CHAPTER19INTERLISP-DDISPLAYFACILITIESThischapterdescribesthefunctionsthatsupportthedisplayandtheinteractionwithprogramsthatusethedisplay.First,abriefintroductoryviewofusingtheInterlisp-DdisplayandhowsomeoftheotherInterlispfacilitieshavebeenextendedtoincludedisplayinterfaces.ThetwoscreenimagesatleftshowsomeofthedisplayfeaturesasusedbyexploratoryprogrammingtoolsoftheInterlisp-Denvironment.Thescreenisdividedintoseveralrectangularareasorwindows,eachofwhichprovidesaviewontosomedataorprocessandwhichcanbereshapedandrepositionedatwillbytheuser.Whentheyoverlap,theoccludedportionofthelowerwindowisautomaticallysaved,sothatitcanberestoredwhentheoverlappingwindowisremoved.Sincethedisplayisbitmapped,eachwindowcancontainanarbitrarymixtureoftext,lines,curves,andhalf-toneandsolidareaimages.Thetypescriptwindowisintheupperleftcornerofthescreen.Itcorrespondstotheoutputchannel.Init,theuserhasdenedaprogram(factorial)andhasthenimmediatelyrunit,givinganinputof4andgettingaresultof24.Next,hequeriesthestateofhislesusingthelepackagefunction,ndingthatonelehasbeenchanged(previously)andonefunction()hasbeendenedbutnotassociatedwithanyleyet.Theusersetsthevalueofto0incommand74,andthesystemnotesthatthisisachangeandaddstothesetof``changedobjects''thatmightneedtobesaved.Then,theuserrunshisprogram,givingitaparsetreeforthesentence``Myuncle'sstoryaboutthewarwillboreyoutotears''.Thisopensupthebigwindowontherightinwhichthesentencediagramisdrawn.Usingthemouse,theuserstartstomovethenodeontheleft(whichisinvertedtoshowthatitisbeingmoved).Whilethemoveistakingplace,theuserinterruptsthetreeeditorusingControl-H,whichsuspendsthecomputationandcausesthree``break''windowstoappearontopoftheloweredgeofthetypescript.Thesearepartofthewindowbreakpackage.Thesmallestwindowshowsthedynamicstateofthecomputation,whichhasbeenbrokeninsideasubprogramcalled.Thewindowtotherightshowsthevalueofthelocalvariablesboundby.Oneofthemhasbeenselected(andsoappearsinverted)andinresponse,itsvaluehasbeenshowninmoredetailinthewindowatthelowerleftofthescreen.Theuserhasmarkedoneofthecomponentvaluesassuspiciousbydrawingonitusingthewindowcommand.Inaddition,hehasaskedtoexaminethecontentsofthecomponent,whichusedthefunctiontoopenabitmapeditwindowtotheright.Thisshowsanenlargedcopyoftheactualimagethatisbeingmovedbythetreeeditor.Insidethelargestbreakwindow,theuserhasaskedsomequestionsabout,andqueriedthevalueof(now66).Usingthelispuserspackage,theMasterscopecommandbroughtupthehorizontaltreediagramontheleft,whichshowswhichsubprogramscalleachother,startingat.Eachnodeinthecalltreeproducedbythecommandisanactiveelementwhichwillrespondtotheuser'sselectingitwiththemouse.Inthesecondimage,theuserhasselectedthesubprogram,whichhascauseditscodetoberetrievedfromthele()ontheremoteleserver()whereitwasstoredanddisplayedinthe``Browserprintoutwindow''whichhasbeenopenedatmiddleright.UserprogramsandextendedLispforms(likeforanddo)arehighlightedbysystemgeneratedfontchanges.Byselectingnodesinthewindow,theusercouldalsohaveeditedorobtainedasummarydescriptionofanyofthe19.1TFFILES?FDRAWBETWEENDRAWBETWEENEDITTREENPFOLLOW/CURSOR"FOLLOW/CURSORFrame"FOLLOW/CURSORPAINTBITMAPEDITBMNPFOLLOW/CURSORDRAWBETWEENBROWSERSHOWPATHSFOLLOW/CURSORSHOWPATHSSHOWNODEDEMO>LATTICERPHYLUMSHOWPATHS|ï\†î%Lî,™ïVÂîŒ î%”î'*î-Ñ xïOŸî ìî îýîéîPî Sî#(î(9î* î/Xî2î4~ î;\î>~îD•îGjïMùî ìî Tî¦îOî‚îÛ î!Ãî%î&Èî*yî,á î2Jî3÷î8°î;pî>|îBîCÙîFAïLSî ìîn îÚî,î”î!…î#@î()î,å î3¸î6›î9Sî=—îB1îC×îFXïJ­î ìî ŽîWîÇî‡îÁî€î Ëî"× î*+ î2Èî6(î7òî:a î?ÊîA ïIî ìî µîÞî<î!îêîj î%î(íî*£î0›î3½î5hî9fî>äî@îC,îFMïGbî ìî îñîàîµîàî‰î˜î%…î(Z î0Kî2î4Ìî6æî9dî=>îAsîD ïE¼î ìî kîZîUî.î­î–î$Þî&j î.÷î3@î5$î8î9ˆî<2î>CîC­îG€ïDî ì îî¶î1î�î"Rî$¿î)~î*ø î2Eî5ƒî:ºî=SîB>îD=ïBqî ìîî¿îÍî\îõîªî!iî$�î'6î*„î-zï?kî ìî Ý î?î�îîÏîHî"cî$ñî)Xî++î-£î2¯î4@ î;öî=¾î@7îDÀï=Æî Ãî ´î ˜îaîÕîâîkîhî§î$¸ î+î-ßî0hî3¢ î;ˆî>3î?üîD1îF6ï< î ìî Åî îñî¡îëîÕî®îzî"eî$vî)\î+Ûî/+î1î3Wî6Nî:î<•î? îDhï:zîöîÜî’îfîîqîëî"Mî'¿ î/Uî2î4Ãî:?î;�î<”î?îBpîG^ï8Ôî ìî ` îÉîâîƒîÖî¦î ~î#vî&î(vî,î7›î9Jî:€î<.îB‹îDÉîG€ï7/î ìîzî-îîÇîIî‰îDî"î/:î0ÿî3tî5¦î7uî=¦îCîEéï5‰î ìî Fîóîâï2„î ìîîî“îÈîî%wî&pî*¬î,î-eî1î3üî6Uî8Ðî>xîAÎîFyï0Þî ìî Ëî)îÓî}î«îaîî!ˆî$ î(”î*¥î-î/aî4‰î6Žî8ìî<<î=éîAôîDRï/8î ìîKîÁîŸî©îî Ðî#:î&=î)Úî+“î/[î4î7î9�î;ùî>yîCîDï-“î ìî —îîæî9î£îiîæî!ùî$Uî(î)xî-¡î1‰î3åî6Ú î=î?{îB9îF7ï+íî ìîñîùîîéîT î%Sî(î,Xî/êî5)î:áî<šîA*îC;îE»îG€ï*Gî ìî ™îÄîbî¦ îgîLî!„î$Lî%êî(/î-<î0õî6­î9jî>‚îC�îG€ï(¡î ìîsîžîRî­ îõî"üî%lî(Âî-mî1iî2Ž î:%îIï&üî ìîî$Iî& î(yî+Ûî/÷î2gî6 î7ëî:[î=±îCyîGãï%VîØîÉîàî®îJî Óî$Cî)�î,Äî.�î3ºî9§î5îDHîF7ï#°î ìî Sî îàî€îîÀîaî ³î%Îî'Yî)ªî-eî/Ìî1xî3Éî8~î;Gî>2î@™îEˆîH&ï" î ìî @îXîyî î‘î!�î&Àî(¼î*î-¥î/úî5î?�î@oîB4îGîï eî ìî ]î.îÙîKî§îî Åî(® î0&î4.î7fî9ÂîDÂîFnï¿î ìî .îöîÐîî×îMî lî#�î'¿î)Èî/vî2Þî4¯î7&î=ŠîA¬îD’îFïî ìînîhîÅî…ïî ìî üîKî’îVîÈî î"ÿî%cî)'î,¨î2§îAcîB0îDÖïnî ìî mî7îøî•î"àî'î0 î5ºî;|î=ý ïÈîºî,îvîžî î%¥î(|î-åî0î2uî5]î9~î=žîA¿ ï#î ìî |î²î¯îœî%'î& î)�î,ùî.­î1î3¢î6jî<Œî>�ï}î ìî>îŸî…îeîŽî �î#/î(cî*î,[î0%î5±î6ýî: î<`îA6îBûîEOï×î ìîQî³î®î$îPî$ó î,éî0øî3oî7ëî9Èî=î>Áî@´îFyï1î ìî 6îuîäîÎî!Àî$ î(šî*Ùî.Îî4Rî5<î9=î:î=îA"îCÄïŒî ìî ™î ÷îùîNî%î#0î%£î(ýî-Øî/pî4î7èî;7îAEîCúï æî ìî îçîî@îóîoî¾ î$ôî&ìî+aî1¤î4Žî:8î ï&üî Ô înï%Vî ì ï" î;jï eî#!î?5ï¿î;?ïî6w ïnî î)ƒîEýïÈî ìï#î; î@òîE&ï×î²ï1îîî/Gï @î ìî!ÿ} ÈÔ`m$dÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPOSITIONsubprograms.Instead,theusertoldMasterscope(inthebreaktypescriptwindow)toeditwhereveranyonecallstheprogram(alinedrawingfunction).Thisrequestcausesthesystemtoconsultits(dynamicallymaintained)databaseofinformationaboutuserprograms,whereinitndsthatthesubprogramcalls.Itthereforeloadsthecodeforintoaneditwindowwhichappearsunderthe``Browserprintoutwindow''.Thesystemthenautomaticallyndsandunderlinestherst(andonly)callon.Onthepreviousline,isusedasavariable(theonetheusersetandinterrogatedearlier).Thesystem,however,knowsthatthisisnotasubprogramcall,soithasbeenskipped.Iftheusermakesanychangetointheeditor,notonlywillthechangetakeeectimmediately,butwillbemarkedasneedingtobeupdatedinitsleandtheinformationaboutitintheprogramdatabasewillbeupdated.This,inturn,willcausethewindowtoberepainted,asitsdisplaymaynolongerbevalid.TheInterlisp-Ddisplayfacilityhasseverallayers.Atthelowestlevelareroutineswhichviewthedisplayasacollectionofbitsandprovidesprimitivesformovingblocksofbitsaround().Theconceptsimportanttothislevelarepositions,regionsandbitmaps.Thenextlevelisthedisplaystream,anabstractionthatimplementsclippingtorectangularareasofthescreen,lineandcurvedrawing,andprintingtothescreenindierentfonts.Theconceptsimportanttothislevelarefontsanddisplaystreams.Ontheinputside,thereisalowlevelinterfaceforreadingthedisplayinputdevices,thecursorlocationandthemousebuttons.Theinputandoutputcometogetheratthenextlevel,thewindowsystemwhichallowsareasofthescreenusedbydierentprogramstooverlapbykeepingtrackofinformationcoveredandprovidingcontrolprimitivesformouseinteraction.Thischapterisorganizedaccordingtotheselevels.19.1POSITIONApositiondenotesapointinanX,Ycoordinatesystem.Aisaninstanceofarecordwitheldsandandismanipulatedwiththestandardrecordpackagefacilities.Forexample,createsapositionrepresentingthepoint(10,20).[Function]Returnsifisa;otherwise.19.2REGIONARegiondenotesarectangularareainacoordinatesystem.Regionsarecharacterizedbythecoordinatesoftheirbottomleftcornerandtheirwidthandheight.Aisarecordwithelds,,,and.Itcanbemanipulatedwiththestandardrecordpackagefacilities.Thereareaccessfunctionsfortherecordthatreturnstheandoftheregion.Thefollowingfunctionsareprovidedformanipulatingregions:[Function]Returnsaninstanceoftherecordwhichhas,,and19.2DRAWBETWEENSHOWLINKDRAWBETWEENSHOWLINKDRAWBETWEENDRAWBETWEENSHOWLINKSHOWLINKSHOWPATHSBITBLTPOSITIONXCOORDYCOORD(createPOSITIONXCOORD_10YCOORD_20)(POSITIONP)POSITIONNILREGIONLEFTBOTTOMWIDTHHEIGHTREGIONTOPRIGHT(CREATEREGION)REGIONXXXLEFTBOTTOMWIDTHHEIGHTLEFTBOTTOMWIDTH|ïb'î&xï\:î ì ïY5î ìîuî!îfî‹ î µî#)î%Õî)ö î0‹î6yî8uî;ƒîA¾îFÑïW�î ìî²îŽîƒî!‹î'& î.‘î1üî7î;¨î>YîC#îE#ïUéî ìî  î` î8î" î$ î+Æî/ãî3î9Ìî?Hî@ÜîDuîG€ïTDî ì î"î%œî&§î(Nî.`î2 î4­î8!îAùîDþîGïRžî ìîî%î/î2î“î$™î(î*yî0ßî3¹î84î;[ îCÊîG(ïPøî ì îµî)îîEîìî‹î*äî+Öî.Iî0½î6^îC_îDáîH0ïORî ìî î\î=îñîYîZî€î ? î'úî-Vî06î5î:÷î?AîBîDÁîF7îH´ïM­î ì î‘î€îNî®î,î’î#Tî$àî'Iî*Kî.‹î15î5äî>åî@�îCîGjïLî ìî îÓîDîüîîÌ î& î/ðî2­î4°î9¾î;î@ÅîB…îDˆïJaî ìî —î nî¿îrîÎ îPî -î!�î#,î%ˆî+î0¥î3Lî5:î;î>î@+îC„îF+ïH»î ìî4î[îîö î$hî&î'íî,›î/�î1¡î5àî7ÏïE¶î ìî ½ î&îÄînîìî[î#ãî(Lî*Bî,›î0Ìî4 î6Xî;œî?¢îBÖîE/ïDî ìî ™î  îñî©îIîþîˆ î%îî(*î-î1[î3î5²î:lî?ïîAqîDGïBkî ìî€îfî>îºîE î!¥î&¡î)�î/ñî3î6Eî9Áî;eî=üîBãîGîï@Åî ì îî îµî!5î# î*qî.#î0î2¦î7xî:cî=OîACîG(ï?î ìî_îBîÖîBî$îåî${î'†î-Sî3åî5Èî8�î<î>žîBDîE/ï=yî ìî^î·îî·îâîeîÍî óî#�î&Ïî,mî.¥î3“î5íî:™î>>îCXîE³ï;Ôî ìîî¨îðî0îžî ^î#ðî&�î*èî.yî3Âî5Dî7Œî:ƒî> î@UîEfï:.î ìîî9îÁî…îðî2î!xî#€î)î/1î0ìî5Ýî7äî=î@•îBZ ï8ˆî ìîîêî;î î#|î%Îî*; î1×î5î:î;„îAßîH0ï6âî ìî r|ï/¿î ìîixï+Zî ìî ‰îÙîòî-îÛîšîœî!™ î(jî-œî6‰î8î:î?bîA,îBgîFÅï)´î ìîî9îåîH î''î*7î,Œî2î6]î;’ îAqîDï(î,Ìî19î2Kî7r î?-îAtîDùï% îC5 ï#dî¦î5î ðî"Zî*<î.B |ï@î ìîixïÛî ìî kî"îî9 îNî 8î!Ùî"õ î)§î.�î3Ùî6 î>\î@JîB› ï6î ìî šîÕî‘îúî=îèî #î#ùî&¤î+Zî2bî3Äî4ãî9&î<5îC$îIï�îîôî­î‚îòîtî] î%>î(Oî*¦î06î4{î9² î?‘îCˆîEÓïêî ìîäîî îWî!"î%Ñî+7î2¤î4[î6¸ïåî ìî ÁîÎîÇîî äî# î+tï àîC5 ï :î¦îÖîÂî$î%¼î-¢î1ëî5òî;�îA¹îG(ïî(o"ÿÿÿ}Ð`m$ÞxïW�î œ ïTDîµî^ î:ŒïPøî!¦ î9‡ ïM­î7œïLî( ïH»î Iî|ïDî:åï+Zî/9ï)´î î²ï(î ìî¤î4îîÄî"Iî(+î)Ùï% î ì îï#dî#ƒî+9ï6î,Ýî?ÈîC÷ï�î ìî£ïêî}î(.î-ìï àî ì î)}ï :î(}Ðä`m$pxï% î*ï#dîÙî”ï àî¯î¼îíî$ãï :î8bî¤ïY5î¦î6‹î9î<ùî>îB(îD×ïW�î¦îÜîÁî"øî&ãî([î+Wî/Žî3Ñî5Iî8Eî;î?>îCîE’ïUéî¦îîº}ïRäî%Žî&+î&Çxî<µîC˜ïQ>î¦îíî*î"~î&œî(î*� î1ùî3Åî5î:>î< îA�ïO™î¦îîˆ î"òî$nî)^î*ñî.‰î0ìî3î7Ùî;øî=_îB îC[îFyïMóî¦}ïJîî"2î"Îî#kxî<µîC˜ïIHî¦îÃîÖî!ÿî%óî'Gî)�î-lî/ î0 î51î6Óî;Üî>;î@‚îE�ïG¢î¦îrîÐî!¾î#vî'î/»î1î4 î6ñî8öî=¹ïD�îC5 ïB÷î¦î4î%y î0Óî1Úî:î;uî>‚î@†îBù ï?òîC5 ï>Lî¦îqî)sî*üî,Cî2±î4³î8Žî:Zî<:îATîG¸ï<¦î ¡î!žî'Âî.öï9¡îC5 ï7üî¦î; î%¼î+¾î.&î7Êî9—îHîDÇîEžîHsï0î¦îˆî cî!¸î'Âî*}î+çî/åî6iî7D î>î?lîF |ï(áî ìîixï$}î ìî Úî¡ î îYî%_î*î+Éî.?î1¼î3Œî8;î9Œî;0î?÷îAzîB¼ ï"×î ìî …îQ î îMîî8î·î!ºî&g î.Lî0¾î4Lî6î8Öî<‡î>Hî@ºîE}ï!1î ìî ˆîIîÅî›îÄîÿîàî%î&âî)“î/fî1²î4òî9î<¤îAéîE3îG€ïŒî ìî­îöî{î8îfîìî Àî"–î%uî'î*‹î-Hî1Yî3õî5÷ î>î?«î@çîD_îEÜîG€ïæî ì îÑîúîõîIî Iî!ªî%çî'^î(~î+Ùî-:î.¾î0Žî5·î7î;?î>Æ îGTï@î ìî êîcî‹îøî$ãî%ïî(Pî+£î/·î5î8Aî;áî?îAÌîC÷îFyïšî ìî =îvî#îî–îXîdî"³ï•î ìîqîîpî³î} î$mî)î,`î.ïî2èî5Œî: î= î?i îFYïïî ìîîQ î”î!îÎî!fî#£î.~î1vî>0îIïJî î(Jî)?î4uî5jî8óî;jî?ÁîDoîG>ï¤î ìî ^îÂî^î¯îgîAîîî Kî#šî&Oî(×î*Æî0;î3Sî5°î;½ ïŸîC5 ï ùî¦îÙî6î#î)ûî+¨ïî(o"ÿ}p`m$*xï\:î'¸î+ðî1Öî9šïY5îÆ î)‰î,î,æî/kî2ÇïRäî ìî-{ïQ>îFÔïJîî ì î*ïG¢î,±ïD�î ìî%†ïB÷îÙî7 ï?òî ì î&½ï>Lî÷ï<¦î,pï9¡î ì î%�ï3Qî ìî·ï1«î,Ëï0îÏî&gîDï@î| ïïî)î4ò î>ì ïJî ìîî, ïŸî ì îƒÿÿ}p`m$|xï\:î¦ïRäî ïR{î×ïRäîMïR{î$ïRäî( ïR{î,ÕïJîî¯ïJ„î{ïJîîñïJ„î ½ïJîî$¬ïJ„î)xïD�îâî $ïB÷î“î+qï?òîî€îÛ ï>Lîï ï<¦î¦î%ï9¡î¯î[î>ï7üî2pï6Vî¦î‰î(Ìï3Qî{î(îàï1«î#î+î5çî7î?ûîGï0î)!î1œïŸîØï ùî$Ì!}pÌ`m$ŠÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿBITBLT[Function]Returnstheheightofinpixels.[Function]Returnsthenumberofbitsperpixelof.Thefunctionsusedtomanipulatebitmapsare:[Function]Createsandreturnsanewbitmapwhichispixelswidebypixelshigh,withpitsperpixel.Ifis,thedefaultis1.[Function]Ifisbetween0andthemaximumvalueforapixelin,thepixel()ischangedtoandtheoldvalueisreturned.Ifis,isnotchangedbutthevalueofthepixelisreturned.Ifisanythingelse,anerrorisgenerated.If()isoutsidethelimitsof,0isreturnedandnopixelsarechanged.canalsobeawindow.[Function]Returnsanewbitmapwhichisacopyof(samedimensionsandcontents).[Function]Returnsanewbitmapthatistimesaswideasandtimesashigh.Eachpixelofiscopiedintoatimesblockofpixels.If,defaultsto4,to1.Therearetwodistinguishedbitmapsthatarereadbythehardwaretobecomevisibleasthescreenandthecursor.Thescreenisabitmap(=1024)wideby(=808)high.Thecursorisabitmap(=16)wideby(=16)high.Theyareaccessedby:[Function]Returnsthescreenbitmap.[Function]Returnsthecursorbitmap.Note:Thecursorbitmapcanbechangedwiththefunction(page19.16).19.4BITBLTistheprimitivefunctionformovingbitsfromonebitmaptoanother.Itissimilartothefunctionthatisusedinothersystems.[Function]anddeneapairofrectangles,oneineachoftheand19.4(BITMAPHEIGHT)(BITSPERPIXEL)(BITMAPCREATE)NIL(BITMAPBIT)NIL(BITMAPCOPY)(EXPANDBITMAP)NILSCREENWIDTHSCREENHEIGHTCURSORWIDTHCURSORHEIGHT(SCREENBITMAP)(CURSORBITMAP)CURSORBITBLTRASTEROP(BITBLT)BITMAPBITMAPBITMAPBITMAPWIDTHHEIGHTBITSPERPIXELWIDTHHEIGHTBITSPERPIXELBITSPERPIXELBITMAPXYNEWVALUENEWVALUEBITMAPX,YNEWVALUENEWVALUEBITMAPNEWVALUEX,YBITMAPBITMAPBITMAPBITMAPBITMAPWIDTHFACTORHEIGHTFACTORWIDTHFACTORBITMAPHEIGHTFACTORBITMAPWIDTHFACTORHEIGHTFACTORWIDTHFACTORHEIGHTFACTORSOURCEBITMAPSOURCELEFTSOURCEBOTTOMDESTINATIONBITMAPDESTINATIONLEFTDESTINATIONBOTTOMWIDTHHEIGHTSOURCETYPEOPERATIONTEXTURECLIPPINGREGIONWIDTHHEIGHTSOURCEBITMAPDESTINATIONBITMAP|ïb1î'xï\:îC5 ïZ”î¦îÙî6î#lî*Sî,ïW�îC5 ïUéî¦îÙî6î$^î&î(´î+'î.‹î4îïRäî ìî Áîºîóî  îÁî#ôïOßîC5 ïN9î¦î�îdî$$î%^î([î-î18î7_î;Yî>¹îEõïL“î¦î!î'lî* î,~î0eî;î? î?åîBBîFæîHPïIŽîC5 ïGèî¦î ­î":î'Æî)î+óî.sî5î8Ùî;6î<�î@îF‚îG€ïFCî¦îî‰î‰î÷î%dî.Yî1î3rî5Ýî9†î:ôîAïD�î¦îî![î"®î% î*]î,Äî/ î2šî4:î6€î9Íî; îA2ïB÷î¦îîÓî!íî#èî'bî(Ø î/Ãî1Oî3Êî4Óî6Iî;î=‚îATîGÂîH©ïAQî¦îî¦î![î#`î'Gî)™î4µî7=î:î;öî=ï>LîC5 ï<¦î¦îÍîéî Éî%kî)iî*Èî+äî/'î5õî9Û î@úîC£ ï9¡îC5 ï7üî¦î5îºî"î' î*5î5Þî9áî;êî?”îG(ï6Vî!‡î%î&„î*î-aî0›î7+î8kî<­î?Xï4°î¦î%ýî* î,î1xî5Ñî@ØîFRîHQï3 î!²î#_ï0î ìî ÷îVî îpî °î#‰î%èî) î+î-î3�î5Jî:iî>Áî@{îBåîG(ï._î ìî Iî÷îÍîîmî–î)î.›î1éî>}îCaîGï,ºî ìîî€î©îî#Nî&œî3/î7dî; î>�î@àîFUï)´îC5 ï(î¦îÙî7î#lï% îC5 ï#dî¦îÙî7î#aï ^î¦î’îhî"’î'Aî)Êî+¹î1"î4:î6—îA›îEW|ï;î ìîixïÖîfî½îîÔî5î ]î%8î'Ãî+î-©î2Dî3Ýî9_î:Âî<î@†îBîDhï0î(îôî_î˜îEîáï îC5 ï îYîÔîÈîÅînîúî ¼î%‰î(î)‡î,‰î.î:-ïî(o!ÿÿÿ}”`m$lxï\:î ì îZïW�î ì îZïOßî ì î(ÏïL“î<„ïIŽî ì î"âïD�îúï>Lî ì î¬ï9¡î ì î.¥ï4°î3Kï._îE î3ã ï,ºîX î(– ï)´î ì ï% î ì ï ^î< ïÖî ìï0î ìïkî ìïÅîE!}”À`m$\xï\:î¯ïZ”î%$ïW�î¯ïUéî0CïOßî¯î¥î  ïN9î2´î@ÅïL“î9 î1æ ïIŽî*îµîlî$î­î!CïGèîIîÒîhîA×ïFCî‡î'î*�î,3îB›îF$îGºïD�îCîB›îF$îGºïB÷î1ÈîCïAQî/†ï>Lîï<¦î0Òï9¡î¯î:îíî ½î%î*Uî+$ï7üî+ûî0¯î1~îA�ï6Vî¦îÞî®î2'î@VîE îEÙï4°îŸî ×î!¦î6ÿî;²î<�ï3 î¦îÞî®ïkî¤îëîî[î$î'Mî/î4D î<ÛîBïÅî ìî îPîFî"Àî&î+Ãî/áî3Íî:ƒ ï î ìîâî0Fî3Œî<¶îAÞ ÿÿ}TÈ`m$äÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIESwhoseleft,bottomcornersareat,respectively,(,)and(,).Iftheserectanglesoverlaptheboundariesofeitherbitmaptheyarebothreducedinsize(withouttranslation)sothattheytwithintheirrespectiveboundaries.Ifisnon-itshouldbeaandisinterpretedasaclippingregionwithin;clippingtothisregionmayfurtherreducethedeningrectangles.These(possiblyreduced)rectanglesdenethesourceanddestinationrectanglesfor.andcanalsobedisplaystreamsorwindows,inwhichcasetheirassociatedbitmapsareused.Themodeoftransferringbitsisdenedbyand.andspecifybooleanfunctionsthatareusedtodetermine,respectively,themethodofcombiningbitswiththeandtheoperationbetweentheseresultantbitsand.isagraypattern,asdescribedonpage19.6.(Note:Thealignmentofthetexturepatternwithissuchthattheoriginofthedestinationbitmapisatanintersectionofthe``tiles.'')specieshowtocombinethebitsfromwiththebitsfrom(abackgroundpattern)toproducea``Source''.Thisisdesignedtoallowcharactersandgurestobeplacedonabackground.SourceFortheandcase,theargumenttoisignored.Forthecase,the,,andargumentsareignored.specieshowthissourceiscombinedwiththebitsinandstoredbackinto.becomesSourceSourceSourceSource,,,anddefaultto0.anddefaulttothewidthandheightofthe.defaultstowhite.defaultsto.defaultsto.Ifisnotprovided,noadditionalclippingisdone.returnsifanybitsweremoved;otherwise.Note:andacceptwindowsanddisplaystreamsastheirbitmaparguments.Inthesecases,theremainingargumentsareinterpretedasvaluesinthecoordinatesystemofthewindowordisplaystreamandtheoperationofthefunctionsaretranslatedandclippedaccordingly.Ifawindowordisplaystreamisusedasthedestinationto,itsclippingregionlimitstheoperationinvolved.19.5NILREGIONBITBLTBITBLTINPUTINVERT(NOT)TEXTUREINPUTINVERTBITBLTTEXTUREREPLACEPAINT(OR)INVERT(XOR)ERASE(AND(NOT))INPUTREPLACEBITBLTTNILBITBLTBITMAPBITBITBLTSOURCELEFTSOURCEBOTTOMDESTINATIONLEFTDESTINATIONBOTTOMCLIPPINGREGIONDESTINATIONBITMAPSOURCEBITMAPDESTINATIONBITMAPSOURCETYPEOPERATIONSOURCETYPEOPERATIONSOURCEBITMAPTEXTUREDESTINATIONBITMAPTEXTURESOURCETYPESOURCEBITMAPTEXTURESOURCETYPESOURCEBITMAPSOURCEBITMAPTEXTURETEXTURESOURCEBITMAPSOURCELEFTSOURCEBOTTOMOPERATIONDESTINATIONBITMAPDESTINATIONBITMAPOPERATIONDESTINATIONBITMAPDESTINATIONBITMAPDESTINATIONBITMAPDESTINATIONBITMAPSOURCELEFTSOURCEBOTTOMDESTINATIONLEFTDESTINATIONBOTTOMWIDTHHEIGHTSOURCEBITMAPTEXTURESOURCETYPEOPERATIONCLIPPINGREGION|ïb'îŒ î%”î'*î-Ñ xï\:î ìîîÂî±îuî3îsîTî"î& î.˜î9˜î:„î=(îIïZ”îpîêîXîËîŽî$î&¦î(åî+0î/î2(î3Íî7£î9:î>îH;ïDî ì îiî–î<îŠî¬ î%î(*î)Žî/>î0äî4ƒ î:ãî=‘îA÷îCžîE†ïBkî ìî ðî  ï>2îÅï2î ìî µî î‘îþî(öî/;î6¸î8Dî>/î@ùï0qî ìî /îî" î"æî0Uî6ýî9Nï-lî™î÷îøî–î áî"Kî(¦î+½î.î0¸î?ÆîBzîF™ï+Æî ìî ï'Ïî)'ï$ÊîÅï" î,ƒïî-Zïî1Žï¯îþîî)6î*î:­î?Eî@çîG(ï îòîîîZî!î¾î!Ýî#}î/Sî6Xî;iî<þïcî ìîîêîiî"Œî*î*ìî7xî8Þî;LîAlîCl ï½î ìî4îŸî î )î!‰î$'î&Æî*î2 ï¸î ìîñîî#zî)Sî,6î1î60î8 î;}î@Z îHïî ìî mî0î‰îÿî ¢î"î î)õî+�î/Âî1jî3 î:|î>îî@ îBùîHï mî ìîšîî½îî?î÷î"Uî(Nî*  î0æî3›î8w î@IîAÊîBóîHï Çî ìîšîîpî©îVî³ î"³î)jî*Fî,î1gî5¦î9mî;ËîAîïî(o }d`m$HxïWIî «îVïSýî'+ïJaîBêï;-î ìï8}î ìï8pîÅî)ˆï5"î ìï2î4îâî1 îCwï$×î ìï"(î ìï" îÅî0�ï"î ìïîÅî1dïî ìïîÅî-®î5˜ïcî·î$4ï½î‘îÎî/ï¸î4îÔï Çî$`"ÿ}dœ`m$jxï\:î&…î)Ëî/bî2¨î= îBÈïZ”î ìî ïXïî=; ïWIî<îA) ïSýî-î0]î9ìî? ïORî#ãî')î/î30î7î:GîB/îFMïM­î@îCJïLîžî5ëî; îCƒïE¶î ìî 2î+•î.ÛîAÂï>€î ìî 2ï;`îÅî ï8pîøî#>ï5VîÅï2î"|ï0qîŒîÓîøî>î%›î(áï-lî ìî î2dî7Œ ï+Æî Áîé ï(î ìî ï'ÏîÅî ì ï" î!î$H ïîøî% ïîøî% ï¯î ìî 2îÎîîÕî"üî,°î1× îBšï î ìî%Ãî) î0îA6îD|ïcîÀîÞî,h ÿÿÿ} `m$ØÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿTEXTURE19.5TEXTUREATexturedenotesapatternofgraywhichcanbeusedbyto(conceptually)tessellatetheplanetoformaninnitesheetofgray.Itiscurrentlya4by4pattern.Texturesarecreatedinteractivelyusingthefunctionorfrombitmapsusingthefollowingfunction.[Function]Returnsatextureobjectthatwillproducethetextureof.Ifistoolarge,itslowerleftportionisused.Ifistoosmall,itisrepeatedtolloutthetexture.[Function]Returnsifitisatexture,i.e.alegaltextureargumentto.Thecommontextureswhiteandblackareavailableassystemconstantsand.Theglobalvariableisusedbymanysystemfacilitiesasabackgroundgrayshadeandcanbesetbytheuser.Theoriginalbackgroundshadeofthewindowsystemiskeptin.Thebackgroundshadecanbechangedbythefollowingfunction:[Function]Changesthebackgroundshadeofthewindowsystem.determinesthepatternofthebackground.Ifisatexture,thenthebackgroundissimplypaintedwithit.Ifisa,thebackgroundistesselated(tiled)withittocoverthescreen.Ifis,itchangestotheoriginalshade,thevalueof.Itreturnsthepreviousvalueofthebackground.19.6SAVINGBITMAPSBitmapscanbesavedonleswiththelepackagecommand(page11.22).ThefollowingtwofunctionstranslatebitmapsintoandoutofarepresentationwhichmaybeusedtotransferbitmapsbetweenInterlispandothercomputersystems'representations.[Function]Createsabitmapbyreadinganexpression(writtenby)fromtheprimaryinputchannel.[Function]Printsthebitmapontheprimaryoutputchannelinaformatthatcanbereadbackinby.19.7SCREENOPERATIONThefollowingfunctionscontrolthedisplayscreen.19.6BITBLTEDITSHADE(CREATETEXTUREFROMBITMAP)(TEXTUREP)BITBLTWHITESHADEBLACKSHADEGRAYSHADEWINDOWBACKGROUNDSHADE(CHANGEBACKGROUND)BITMAPTWINDOWBACKGROUNDSHADEVARS(READBITMAP)PRINTBITMAP(PRINTBITMAP)READBITMAPBITMAPBITMAPBITMAPBITMAPOBJECTOBJECTSHADESHADESHADESHADESHADEBITMAPBITMAP|ïb1î&Cï\8î ìîixïWÓî ìî vî‘î–î¾îwî-î 8î$Aî&Éî(·î+ïî3uî5! î> îCÄîF!ïV-î ìî —îùîæî’îîÌî[îÏî!8î' î(4î)fî+^î,�î1Íî7kî9ºî>~ îF7ïTˆî ìî IîÒî”îøî$+î'Ñî*.î0;ïQƒîC5 ïOÝî¦îÒîóî"�î&�î)bî,î1Pî3¦î8Cî>žî?rîFîGuïN7î¦î[î*î èî#Rî(#î)„î-=î3Úî5<î7šî;…î<Ñî>3îCÀîEcîGjïL‘î¦îïIŒîC5 ïGæî¦î"î#xî$Íî&7î'`î,\î.Áî/êî3-î7Ñî=õîD¬ïDáî ìî •îîî×îî î)î ¤î"Éî%ˆî(Rî)Óî+Šî.î09î<žîGŽîH=ïC;î ìî ëî&îòî>îWî!2î$Úî&‘î)2 î.qî/þî1î3Èî8mî;Zî?îA®îDîEçîGãïA–î ìî îˆî1î îÊîcî"î# î%Ñî'öî*Ìî,ƒî/î0Uî3AîFgîGï?ðî ìî ¬îpîNî×îÆî0î!*î#‡î%î'8î)”î,3ï<ëîC5 ï;Eî¦înî  î'Êî+æî-Ûî0uî5Úî@B îG€ï9Ÿî¦îqî9î § î(àî.úî0vî1¯î6Àî9óî îAîG3ï'€î ìîî×îCîSî!Aî#îî%ßî'B î0jî4®î7éî:î=„î?jîDªï%Úî ìîUîÉî~îî!?î&’ï"ÕîC5 ï!/î¦îžîÚî"œî$©î)¬î+® î2sî7®îBùîD îG€ï‰î¦îØî €ï„îC5 ïÞî¦î îî'ïî)ùî,]î1•î6 î;-î<àî>îB�îE_îGîï9î¦î¾îî¯î*|ïî ìîiî˜xï °î ìî ÁîÎîÇîuîÒî$�ïî(o ÿÿÿ}¤`m$ÄxïWÓî-èïTˆî¾ïQƒî ìî#˜ïIŒî ìîïGæî?¢ïDáî3à î?' ïC;îþïA–î4Âï<ëî ìîï7ùî* ï6Tî,ï4®î¦ï)&î"ßï"Õî ì ï!/î9» ï„î ì îƒï9î!¨ !ÿÿÿ}¤Ì`m$TxïQƒîíïOÝî9óî@ëïN7î.µïIŒîSïGæîÙï<ëî ï;Eî;�ï9Ÿî*rï7ùî#ï6Tî&ï„îØïÞî"¹"ÿÿ}pL`m$:ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIES[NoSpreadFunction]Setstheinterpretationofthebitsinthescreenbitmap.Ifis,a0bitwillbedisplayedaswhite,otherwisea0bitwillbedisplayedasblack.returnstheprevioussetting.Ifisnotgiven,willreturnthecurrentsettingwithoutchanginganything.Note:ThisfunctiononlyworksontheXerox1100andXerox1108.[Function]Setstherateatwhichthescreenisrefreshed.isoneofor.Ifis,thescreenwillberefreshedatthesamerateasTV(60cyclespersecond).Thismakesthepicturelookbetterwhenvideotapingthescreen.Note:Changingtheratemaychangethedimensionsofthedisplayonthepicturetube.Severalfunctionsareprovidedforturningothedisplay(partiallyorcompletely).Seepage18.22.19.8CHARACTERSANDFONTSFontscontrolthewaycharacterslookwhenprintedonthescreenoragraphicsprinter.Fontsaredenedbyadistinctivestyleor(suchasGachaorTimesRoman),a(suchas10points),and(suchasboldoritalic).Fontsalsohaveathatindicatestheorientationofcharactersonthescreenorpage.Anormalhorizontalfont(alsocalledaportraitfont)hasarotationof0;therotationofavertical(landscape)fontis90degrees.Whilethespecicationallowsanycombination,inpracticetheuserwillndthatonlycertaincombinationsoffamilies,sizes,faces,androtationsareavailable.Inspecifyingafonttothefunctionsdescribedbelow,aisrepresentedbyaliteralatom,abyapositiveinteger,andabyathree-elementlistoftheform.,whichindicatesthethicknessofthecharacters,canbe,,or;canbeor;andcanbe,,or,indicatinghowspreadoutthecharactersare.Forconvenience,facesmayalsobespeciedbythree-characteratoms,whereeachcharacteristherstletterofthecorrespondingeld.Thus,isasynonymfor.Inaddition,certaincommonfacecombinationsmaybeindicatedbyspecialliteralatoms:========Afontalsohastheproperties,,and(=+),and,foreachcharacter,awidthandbitpattern.Theisthemaximumheightofanycharacterinthefontfromitsbaseline(theprintingposition).Theisthemaximumextentofanycharacterbelowthebaseline,suchasthelowerpartofa``p.''ThereforethetoplineofacharacterwillbeatBase+-1,whilethebottomlinewillbeatBase-.Thewidthofeachcharacterspecieshowastream'spositionwillchangewhenthecharacterisprinted.ThismayhavebothanXandaYcomponent(e.g.,forlandscapefonts),anditvariesfromcharactertocharacterinvariablepitchfonts.19.7(VIDEOCOLOR)NILVIDEOCOLORVIDEOCOLOR(VIDEORATE)NORMALTAPETAPEFAMILYSIZEFACEROTATIONFAMILYSIZEFACE(WEIGHTSLOPEEXPANSION)WEIGHTBOLDMEDIUMLIGHTSLOPEITALICREGULAREXPANSIONREGULARCOMPRESSEDEXPANDEDMRR(MEDIUMREGULARREGULAR)STANDARD(MEDIUMREGULARREGULAR)MRRITALIC(MEDIUMITALICREGULAR)MIRBOLD(BOLDREGULARREGULAR)BRRBOLDITALIC(BOLDITALICREGULAR)BIRASCENTDESCENTHEIGHTASCENTDESCENTASCENTDESCENTASCENTDESCENTBLACKFLGBLACKFLGBLACKFLGTYPETYPETYPE|ïb'îŒ î%”î'*î-Ñ xï\:î<µîC˜ïZ”î¦î¸îG î&î'÷î*†î-Vî/3î1Âî6(î;îîDàîIïXïî¦îôîLîŒîZî!nî'¬î)}î-Àî4î5Vî6®î8îî;¼î=ÐîDîEßïWIî eî$èî'î,xî1Nî9‡î:Æî= ïU£î¦îOîzî ×î%œî)þî/î4ÜïRžî¦î’îªî$î'5î+3î-7î/”î3³î6öî9«î=ÉïO™îC5 ïMóî¦îîÔî‹î!î%î'pî+�î,ÿ î7<î8žî;?îBtîGŠîH\ïLMîrî Cî!)î#�î'Ïî*‚î,{î2ˆî4)î6‘î:î<ßî>•îAîCmîGjïJ§î¦îQî sî$³î'î+Êî.ìî2ëî6§î:nî>¯îAîEñïIî¦îàî =î"ýî%þî*¡î,þ î4)î5áî8>î<ìî>ðîANîEòïEüî ìîºî³îîÑî î#æî&î(]î- î2âî4¥ î<–î?)îBm|ï>Ùî ìîi î�î(xï:tî ìî »î\î¬ît îÍî Öî$zî)=î+3î-ƒî1«î3`î4{î9×î>ãîB³îD÷ï8Îî ìî Üî ú îxîœîØî!vî#î'eî) î2[î7Pî:íî<�î>iîCRï7)î ìî �îTî‹îXîÌî³î‡î"Ôî+Nî.#î3Ùî6@ î=?î? îEqîG€ï5ƒî ìî&îîîÄîUî î “î#„î&Ìî*Åî+óî0éî4Sî6Ëî7ùî=%î>âî@—îBùîH&ï3Ýî ìî îø î:î/î¤î’î##î'Bî)© î1zî5®î8V î@¡îBXîG€ï27î ìî âî‹îaî-îDîÆ î%1î&èî,[î/ßî3œî6Qî;ûî>M ï/2î ìî ´ î îDî+îÓî,î î&@î*�î1Jî2° î:î<î='îA îDÙï-Œî ìî ïî !î<î7îöîî!î"Gî%Âî*þî-Cî/î1jîIï+çîöîÚîìîŸîî!ïî#®î& î,Üî/mî4Àî:¯î;’îA�îGTï*Aî ìîŽîEîUî%Cî'Þî/Âî9î:îB“îC‚ ï(›î ìî áî6îœîí îGîî!´ î)Çî-î0î2Ñî4´î:Hî<5î?°îE‡ï&õî ìîî3îî…îåî¨î!;î"õî%U î.Eî1èî8Éî:6î;aîA:ï%Pî]î^îîÍî$>î)×î,¦ î4ÿî7îî9Ëî?§îA�îEõï#ªî ìï ¥î(î'ºïŸîzî%5ïšî Ìî"°ï•î×î&ãï�î ìî œî¬î›î3îµ î"Vî)8î*9î2Æî:úîBäîDgîG¢ïêî ìî 9 îšîâîßî³îíî#ˆî,)î-³î0/î6Éî;î<õî?²îE´îG€ïDî ìî òîpîcî•îcîTî « î'3î0£î2(î4 î;5î?oîAAîCúïŸî ìîî�îÁîòî>îî‚î"fî%eî'9î(î,î2|î4öî7‡î:Xî<-î=sîCsîF:îHFï ùî ìî îƒîîÍî0îúî"´î%cî'Xî(õî2î2åî5Àî9¤î;aî>•îD~ï Sî ìî îBî îóî±î kî$3î&¦î,Ÿî.î3µî6âî9ùî=Sî@¢îB¦îDHîGîHRï ­î ìî îdîŸîåî!%î#Úî%/î)î,zî2]î4 î9íî;™î@ËîDGïî(o ÿÿÿ}``m$xï\:î ì î�ïZ”îF|ïWIî¦ î@ò ïO™î ì îhïMóî<îîD-ïLMîæï8ÎîTî3zîEýï7)î$ï/2î+ÁîEýï-Œî(î4Øî;�î@› ï+çî ìî1dî5¤î=]îB•ï*Aî íîcîî)àî0° î;Úï&õî5¾îCwï%Pî ìî¤ï ¥î ìî îÅî }î)�ïŸî ìî^îîøî'ïšî ìî°îºîsî$“ï•î ì îºîÅî¦î(Æï�îKî#Vî-î5Gî=ïêî&|ïDî*#ï ùî ÿî,"ÿ}`Œ`m$®xï\:îî_î¥ïZ”î=Ÿî?ýîCCïWIî2£î5î8FïO™î*ïMóî3‚ïLMî¦ÿ} ì$`m$.ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿCharactersandFontsTheinformationaboutaparticularfontisrepresentedinafontdescriptor.Thefollowingfunctionsmanipulatefontdescriptors:[Function]Returnsafontdescriptorforthespeciedfont.isanintegerindicatingthesizeofthefontinpoints.speciesthefacecharacteristicsinoneoftheformatslistedabove;ifis,isused.,whichspeciestheorientationofthefont,is0(or)foraportraitfontand90foralandscapefont.indicatestheoutputdeviceforthefont.ForInterlisp-D,thepossiblevaluesforareforthedisplayscreenandforPressprinters.defaultsto.Fordisplayfonts,looksforalewiththeappropriatename(suchasforafont),searchingthroughdirectoriesonthelist.Iftheleisfound,itisreadintoafontdescriptor.Iftheleisnotfound,looksforfontswithlessfaceinformation(inthisexample,)andfakestheremainingfaces(suchasbydoublingthebitpatternofeachcharacterorslantingit).Ifnoappropriatelysizedfontisfound,theactionofthefunctionisdeterminedby.Ifis,itgeneratesaerrorwiththenameofthemostspecicletried(intheexample);otherwise,returns.ForPressfonts,accessesthewidthsinformationforthefontfromafont-dictionarylewhosenameisinthelist(usuallyinitializedinthesite-greetingletocontainatleast.Thatdictionarymustcontaininformationforthefaceasspecied;thereisnoacceptablefakingalgorithmforhard-copyfonts.Thewidthandheightinformationforpressfontsisexpressedinmicas(=10microns=1/2540inch),notinscreen-pointunits.Theargumenttomayalsobealist,inwhichcaseitisinterpretedasa---quadruple.Thus,isequivalentto.mayalsobeafontdescriptor,inwhichcasethatdescriptorissimplyreturned.[Function]Returnsifisafontdescriptor;otherwise.Thefollowingfunctionstakeafontasoneargument.Thisargumentmusteitherbeaparticularfontdescriptororcoerceabletoafontdescriptor.Adisplaystreamiscoercedtoitscurrentfont,awindowiscoercedtothecurrentfontofitsdisplaystream,andanythingelseiscoercedbyapplyingtoit.[Function]Returnsthevalueofthepropertyoffont.maybeoneof,,,,,,,,,,or.[NoSpreadFunction]Returnsafontdescriptorthatisacopyofthefont,butwhichdiersfrominthat'spropertiesarereplacedbythespeciedproperties19.8(FONTCREATE)NILSTANDARDNILDISPLAYPRESSDISPLAYFONTCREATESTRIKETIMESROMAN8BI.STRIKETIMESROMAN8BOLDITALICFONTDIRECTORIESFONTCREATETIMESROMAN8I.STRIKENILFILENOTFOUNDTIMESROMAN8BI.STRIKEFONTCREATENILFONTCREATEFONTWIDTHSFILES{DSK}FONTS.WIDTHS)FONTCREATE(FONTCREATE'(GACHA10BOLD))(FONTCREATE'GACHA10'BOLD)(FONTP)NILFONTCREATE(FONTPROP)FAMILYSIZEFACEWEIGHTSLOPEEXPANSIONDEVICEASCENTDESCENTHEIGHTROTATION(FONTCOPY)FAMILYSIZEFACEROTATIONDEVICENOERRORFLGSIZEFACEFACEROTATIONDEVICEDEVICEDEVICENOERRORFLGNOERRORFLGFAMILYFAMILYSIZEFACEROTATIONFAMILYXXXFONTPROPPROPFONTPROPOLDFONTPROP1VAL1PROP2VAL2OLDFONTOLDFONTOLDFONT|ïb'î#3 î*î,ºxï\:î ìî ó î¨î¹î î vî#”î%0 î,Æî.¥î/ÿî3 î:žî=¦îCäïZ”î ì î îù ïW�îC5 ïUéî¦îîƒî!¯ î(Vî*Òî-pî3Rî:Ïî©îC‚ ïTDî¦î2î îðî!}î$—î&sî/aî4îî7{î:ŠîCrîEMîH&ïRžî¦îî0î"ðî'�î,®î0·î9î:…îDÞîEÓïPøî¦îît î&qî(1î*—î-åî/Yî0•î5^î6dî8¨î9Ùî>ÒîAÇîD„îFpîH´ïORî¦îøî&–î,Nî.¸î32î7î9Çî<0î?ÅîBz îGãïM­î¦î÷î(î#Fî*eî3î52î7ƒî<%î@NîG¢ïLî¦î+î%½î*åî2tïIî¦î4îÈî+Jî.Êî0êî7lî9£î<¡î>ã îF!ïG\î¦îgî.™î0îîF!ïE¶î¦îºî"ó î)¡î+«î.î<éî=Êî?QîA´îD îE{ïDî¦îîŽîºî ¤î!áî$á î,î-œî0î2tî3òî6yîCóîG¢ïBkî¦î$îIî êî#Ù î+jî-�î0JîFîG(ï@Åî¦îFî¿î$Uî'Ôî+—î-^î/sî5Zî7Óî: î>Þî@±îCúï?î¦îxî£î!!î"±î$Ä î->î0¼î3·î51î9¥î<î@5îAüîDhï=yî¦îF î ½î+‹î,›î7¨î;Íî<Þî>gîDŸï;ÔîÜî#lî&¦î)&î-î.Ýî1\î4×î9Éî<=î?£îAêîDiï:.î(tî)ê î9Pî@„ï7)î¦îKîÌî*wî/¦î1ÿî6] î=Üî@îBmîETîH´ï5ƒî¦î‡ î Ïî"øî&úî*�î+Ïî-Rî/‡î>�îCŽ ï3Ýî¦î8îzîíî#î%Pî&âî+¢î-î?Eî@CîCl ï27î¦î'î  î'½î*î,�î/Œî1Uî7™î;;î<Âî>ã îE¨ï0’î¦îØî î#8î&î*oî-<î1î3¾î7ì î?fîA™îE îHsï.ìî¦îàî�î#_î%»î'žî,Ðî.³î3Uî73î9¦î;Rî?|îCï+çî¦îÐî&(î1'î4\î7Yî9|î:Øî=¬î?�îCÊîFêîHsï*Aî¦ îÞî ·î&uî)uî,úî4u î<ï(›î&Åî(‚ î/|îIï&õîÎî î#î%:î&žî)Å î0Îî2¶î6ûî:"î=) îCËîEqï%Pî¦ï"JîC5 ï ¥î¦î5î ðî"Zî#ƒî&o î0X ïŸî ìî âîî)îAî‹î —î"eî%/î,:î/rî5·î9=î=Gî?Wî@¡ îFñïúî ì îSî îÉîwî îŒ î%xî'î+²î0î1Šî6‘î8?î:î>ÞîB"îCKîHsïTî ìîõî¤îîÊî¸îrîMî"ýî'Äî*{î0(î2Þî4Kî9Tî;Pï®î ìî ™ï©îC5 ïî¦î>î î$ î&(î-*î3%î5Bî;úîAzîDàîG4ï^î¦îÈî#_î'÷î.<î3«î�îBgîFyï gî;î î(åî*f î0ùî3mî9î;*î=©îCl ïî(o ÿ}Ð`m$ÖxïW�î ì î5ÈïRžî.2î1¬ïPøî2ÙïM­î,ªîB÷ïLî,’ïIî"z î1øïG\î-î20 î;nî= ïE¶î0OïDî:ô ïBkî6'ï=yî9HîEýï;Ôî¦îï:.î¦î0e î=ÿï7)î!� ï5ƒî1šï3Ýî0%ï+çî( ï*Aî@ ï(›î¦î_î äî1{ î;�îArîC÷ï"Jî ìî¥ï ¥î-NïTî@ò ï©î ìîñï^î½î î$šî)2î/wî4æî=±îC÷ï¸î¦îdî& ï ³î ìî+Ù"}И`m$¢xïW�îîžî’îIî±îNîî �î!}î#$î#ãî'Ïî-(î1‰î4ßïUéî7ƒïTDî+¢î,@î-ïRžî)î)£î*rî>Œî?lîAîAÒïORî!ŒïM­î%tïLî Àï=yî"ëî'Lî*¢î.Pî2°î6ï+çî¯îMî@ï*Aî" î"ªî%�î&îî)îî*Œî+[î-sî.Sî/úî0¹ï&õî¦îDî7ï"JîÍï ¥îÙî”ï©îSîîšîAïî(ëî*’î8’î9Qî=:î>áï ³îSî™î!îÈï Iîxï ³îíîœï Iî ;ï ³î!°î#Wï Iî%ï ³î&|î'*ï Iî(Éï î5~î8Äï gî¦îìî"öî&= ÿÿÿ} hÈ`m$ÞÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIESandvalues.Thus,willreturnaboldpressfontwithallotherpropertiesthesameasthoseof.acceptsallthepropertiesthatinterrogatesexceptfor,,and.Iftherstpropertyisalist,itistakentobethesequence.Thus,isequivalenttotheexampleabove.[Function]isanintegerthatrepresentsavalidcharacter(asreturnedby).Returnstheamountbywhichastream'sX-positionwillbeincrementedwhenthecharacterisprinted.[Function]Like,butreturnstheYcomponentofthecharacter'swidth,theamountbywhichastream'sY-positionwillbeincrementedwhenthecharacterisprinted.Thiswillbezeroformostcharactersinnormalportraitfonts,butmaybenon-zeroforlandscapefontsorforvector-drawingfonts.[Function]Returnstheamountbywhichastream'sX-positionwillbeincrementediftheprintnamefortheInterlisp-Dobjectisprintedinfont.Ifisadisplaystream,itsfontisused.Ifisnon-,the-pnameofwithrespecttothereadtableisused.[Function]Returnstheregionoccupiedbyifitwereprintedatthecurrentlocationin.Thisisusefulfordeterminingwheretextisinawindowtoallowtheusertoselectit.Theargumentsandarepassedto.Itissometimesusefultosimulateanunavailablefontortouseafontwithcharacteristicsdierentfromtheinterpretationsprovidedbythesystem.Thefollowingfunctionallowstheusertotellthesystemwhatfontdescriptortouseforgivencharacteristics.[Function]Indicatestothesystemthatisthefontwiththecharacteristics.Ifis,thefontassociatedwiththesecharacteristicsisclearedandwillberecreatedthenexttimeitisneeded.Aswithand,iscoercedtoafontdescriptorifitisnotonealready.[Function]Returnsthefontthatwouldbeusedasthedefault(ifwerespeciedasafontargument)fordevice.Ifisafontdescriptor,itissettobethedefaultfontfor.Thefollowingfunctionsallowtheusertoaccessandchangethebitmapsforindividualcharactersinadisplayfont.[Function]Returnsabitmapcontainingacopyoftheimageofthecharacterinthefont.19.9(FONTCOPY'WEIGHT'BOLD'DEVICE'PRESS)FONTCOPYFONTPROPASCENTDESCENTHEIGHT(FONTCOPY'(WEIGHTBOLDDEVICEPRESS))(CHARWIDTH)CHCON1(CHARWIDTHY)CHARWIDTH(STRINGWIDTH)NILPRIN2(STRINGREGION)STRINGWIDTH(SETFONTDESCRIPTOR)NILFONTPROPFONTCOPY(DEFAULTFONT)NIL(GETCHARBITMAP)FONTFONTPROP1VAL1PROP2VAL2FONTCHARCODEFONTCHARCODECHARCODEFONTSTRFONTPRIN2FLGRDTBLSTRFONTFONTPRIN2FLGSTRRDTBLSTRWINDOWPRIN2FLGRDTBLSTRWINDOWPRIN2FLGRDTBLFAMILYSIZEFACEROTATIONDEVICEFONTFONTFAMILYSIZEFACEROTATIONDEVICEFONTFONTDEVICEFONT_DEVICEFONTDEVICECHARCODEFONTCHARCODEFONT|ïb'îŒ î%”î'*î-Ñ xï\Aî¦î£î )ïZ›î¦î¦î'î ¦î$+î'üî+>î.­î0ñî4ä î;¬î>_îB0îD3îH&ïXõîî#î'§î)ƒî+Í î2+î< îChîG¢ïWOî±î#ˆî$}î,Vî-Kî.åî1\î46î9åî;iî<«î?_î@ÍîBQîF(îGîïUªî¦}î)¨î*Dî*áxî+Äî2*ïTî(!î)‹ î04î1àî4>î9±ïPÿîC5 ïOYîßî 8î"î&œî)W î/Áî0Ùî4,î9ýî<îA–îH‰ïM³î¦î×î3î$8î&0î*8î+_î0¥î2&î7aî:î;õ îCÐîG€ïL î¦îŠîôïIîC5 ïGbî¦î"§î#Çî&Šî+}î.î/îî7Tî9Oî;ñ îBôîG€ïE½î¦î±î®î"¼î#éî)4î*µî/õî2¢î4• î¹îB{îDóîGîïBqî¦îfîfî¡î%çî)Vî+î-Tî1iî6°ï?lîC5 ï=Æî¦î î–î$Ìî&öî+/î,ˆî2î3€î8íî;Æî=ä îEðîG€ï< î¦îfî Äî#C î(¬î*qî1µî3Bî84î:î@yîAvîG'îH´ï:{î¦îyî!kî#hî&xî(î,0î4}î6 î;Pî îBçîH0ï2„îÿîÄî Äî"î&î(: î/Óî3Ñî6oî7Ãî9Yî:kî?{îAîD îFæï0ßî¦îSîîèî!½î.èî6Gî8˜î<úîGäï-Ùî ìî gî ÖîŽî¨îZîÓî Ç î( î*þî,Æî.xî0ðî2î5î8,î@êîFyï,4î ìî =îMîîüîNî$Dî'î-î2xî6–î8èî;Óî=uî?ÆîBîFƒï*Žî ìî × î>îëî^î™îJï'‰îC5 ï%ãî¦î[îïî!4î%“î,î-kî/°î2„î5ƒï$=î„î%¶î*äî.µî/rî1°î4} î:Äî=½îA$ï"—î¦îî­î Sî"íî$Íî*¬î,ûî/øî3 î4Rî5®î:ñî<ñîG(ï òî_î#&î$�î)—î+Dî,lî/X î5¿î7î8sî9ÝîùïìîC5 ïGî¦îî„î"—î%Šî)Ûî+ñî/Qî1%î3©î8tî=¤îAîFáîH´ï¡î¦î˜î!;î#|î,<î-î2•î4î54î8& î>ìî@GîA·îCØîE‹îG€ïûî¦îJî6î%ëïöî ìî ÚîÿîîÏîEî"Tî$î(<î+ î/Æî2;î7‡î9Û î@o îFïîH´ïPî ìîšïKîC5 ï¥î¦îìî(î"é î)¯î*ëî.Lî0î2‡î6£î8mî:ÝîH0ï ÿî¦îî Wïî(o"ÿÿ}ø`m$hxï\Aî$Vî0ûî7´î<¿îCwïXõîÖî4äïWOî¦î¦î'LïUªî5ûîB ïTî¦îÚî!»ïPÿî ì î7ïOYîC~ïIî ì îïGbîï?lî ì î'kï:{î8Ëî>Òï5Ðî ì î*4ï0ßî>¦ ï'‰î ìî6qï$=î,/ï"—î?úï òî¦ïìî ì î£ïGî:sïKî ì î!”"ÿÿ}ø`m$xxï\Aî,½î-|ïXõî¦îeïUªîî©ïU@îYïUªîpîïU@î ½ïUªî!Õî#|ïU@î%,ïUªî&Cî&òïU@î(‘ïUªî>bî?!ïPÿî*î‘îÐî�ïOYî¦îïIîîhî§îfï?lîØîîÝîeî!|î#Eï< î.¨î=î=ÐîCîCØï:{î-Õî2ìï8Õî¦î,Oï5Ðî¯îõî$î.î$Eî&ï4*î+³ï2„î¦îÕï0ßî(eî-|î1�ï'‰îâî€îsî+î"’î#0î#ÿî&~î'_î)î)Åî-±î3 î3Éï%ãî(Fî)î7Èî8fî;Yî<œî?�î@-î@üîCîCçîEŽîFMï$=î¦î'î'×ï òî;îúïìîØî1îðîxï¡î'Ãî.¤î/bïûî!rïKî†îíî,îëï¥î@ÓîD;ï ÿîðî®ÿÿÿ}ü`m$ ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿDisplayStreams[Function]Changesthebitmapimageofthecharacterinthefonttothebitmap.Currently,mustbethesamewidthandheightasthecurrentimageforinthefont.Userscaninteractivelyeditcharactersusingthefunction(page20.10).19.9DISPLAYSTREAMSStreamsareusedasthebasisforallI/Ooperations.Filesareimplementedasstreamsthatcansupportcharacterprintingandreadingoperations,andlepointermanipulation.Displaystreamsareatypeofstreamthatalsoprovidesaninterfacefortranslation,clipping,andguregenerationonbitmaps.Alloftheoperationsthatcanappliedtostreamscanbeappliedtodisplaystreams.Forexample,adisplaystreamcanbepassedastheargumentto,toprintsomethingonthebitmapofadisplaystream.Inaddition,specialfunctionsareprovidedtodrawlinesandcurvesandperformothergraphicaloperationsondisplaystreams.Callingthesefunctionsonastreamthatisnotadisplaystreamwillgenerateanerror.Windowsarecloselyrelatedtodisplaystreamsandcanbethoughtofasatypeofdisplaystream.(Inthenearfuture,windowswillbeatypeofdisplaystream.)Allofthefunctionsthatoperateondisplaystreamsalsoacceptwindows.Displaystreamscanbecreatedwiththefollowingfunction:[Function]Returnsadisplaystream,withinitialsettingsasindicatedbelow.Ifisspecied,itisusedasthedestinationbitmap,otherwisethescreenbitmapisused.Eachwindowhasanassociateddisplaystream.Togetthewindowofaparticulardisplaystream,use:[Function]Returnsthewindowassociatedwith,creatingawindowifonedoesnotexist.Returnsifthedestinationofisnotascreenbitmapthatsupportsawindowsystem.19.9.1ManipulatingDisplayStreamsThefollowingfunctionsmanipulatetheeldsofadisplaystream(theymayalsobegivenawindow,inwhichcasetheassociateddisplaystreamisused).Thesefunctionsreturntheoldvalue(theonebeingreplaced).Avalueofforthenewvaluewillreturnthecurrentsettingwithoutchangingit.Thesefunctionsdonotchangeanyofthebitsinthedisplaystream'sdestinationbitmap;justtheeectoffutureoperationsdonethroughthedisplaystream.Warning:ThewindowsystemmaintainstheDestination,XOset,YOset,andClippingRegioneldsofeachwindow'sdisplaystream,adjustingthemduringwindowoperations.Usersshouldbeverycarefulaboutchangingtheseeldsinawindow'sdisplaystream(with,,,or).19.10(PUTCHARBITMAP)EDITCHARPRINT(DSPCREATE)(WFROMDS)NILNILDSPDESTINATIONDSPXOFFSETDSPYOFFSETDSPCLIPPINGREGIONCHARCODEFONTNEWCHARBITMAPCHARCODEFONTNEWCHARBITMAPNEWCHARBITMAPCHARCODEFONTDESTINATIONDESTINATIONDISPLAYSTREAMDISPLAYSTREAMDISPLAYSTREAM|ïb'î$Äî)³xï[øîC5 ïZRî¦îLîÅî$�î(µî*ˆî-î:gî¨îE·îG€ïX­î¦î'Xî(I î:|î=÷î?üîBoîEÿïWî¦î[î‘î >î"›î'`î+hî4îî6šî8øî?KïTî ìî ½îF îîÁ î!(î$Îî.hî3Ýî7š|ïLÞî ìîiîxïHyî ìî(î„îÈîîçîJî�î ‰î#] î*¨î. î0g î8»î:rî?lîBBîDÖïFÔî ìîãî5îþî î$î&äî)Jî.# î7Cî<]îAaîCÇîEîH&ïE.î ìîcî:îî¥îŸî!Kî#‘ î*µî0dî3$î7 î=áî?ñîEÉîH&ïCˆî ìî n î:î*îØîâî´î$Éî'vî)Šî.”î0fî59î;î=èîCáîE/ïAâî ìîFî½îšîêî„îÐî âî&°î'zî)î,hî2óî4åî71î;Îî=sî>ŠîC&îHï@=î ìî°î*î$îxî"Gî#öî'hî*¢î-Yî1œî4Sî9¨î=FîC5 ï>—î ìî äî…îôî«î%î$î& î'%î+…î.Dî/¢î2î3$î7Æî<&î>ÂîD5îFï;’î ìîîxîî©îlî"1î'8î*î,£î.¨î3Üî5ªî7nî8­î;Ðî=žîBcîG—ï9ìî ìî Uîyîî¸îmîiîžî"·î${î)6î.Äî1!î2åî5Oî;Tî>,îCîE/ï8Fî ìîÜî¦îÝï5Aî ìîòîâîkîZîî 7î"”î(¡ï2<îC5 ï0–î¦îÜîî"¸î'€î*šî.…î3mî5î;î?¢ï.ðî¦î6î^î Ùî"hî%Çî'™î* î1Aî6wî<Àî?CîCžîHsï-Kî¦ï*Eî ìî [î‚îõîã îIî!øî&çî) î+Rî-°î2Öî4Žî5¶ î;æî@”îEXï'@îC5 ï%šî¦îî„î$Ò î+`î8³î9¶î?î@_îE­îG4ï#õî¦îÚîSî!î)`î*Çî-* î41î@ŽîAÿîDxîE¨ï"Oî¦îUî!î$¬î%Õî*ü|ïêî ìîi îÜîËxï†î ìî Ìîäîç î î"|î&"î'åî)î-Òî2Iî5Úî8æî;»î=µîApîB¤îH0ïàî ìî îî† îîÊî#Nî$Ðî)Lî-bî3rî7µî:*î<©î@gîCUîFï:î ì î—î2îèîÉîî�î"|î&2î(ëî-%î/“î4gî8Ùî=ðîC×îEßï”î ìîÔîÈî*î¾îLîóî?î!Îî#jî%·î*Uî/Œ î6|î;™î>'î@tîDîE½ïïî ì î“îî6î”î Bïéî ìî`î_î®îNî#°î&6 î.î3µî9Pî<. îFAïDî ìî éî]î¦îšî¶î%Þî)ªî.]î3É î;Æî?ÞîDœîFÑï žî ìîgî3îùîmîöî ‘î!¨î'˜î,4î0Žî?ÑîIï øîSî.î#:ïî("ÿÿÿ}4`m$Šxï[øî ì î-`ïTî',ïAâî"}ï2<î ì î]ï'@î ìî�ï#õî&Qï:î¯ï žî4 î@š ï øî ì îñ"ÿÿÿ}4l`m$8xï[øî†îíî,îëî"tî%F ïZRî3î6hîA°îBoïX­îkî= î.öî1È ïWî-¤î1 î;ãî<¢ï2<î*îQï0–îA&îFMï'@î{îªï%šî.Ÿî2Íï#õî5ïî:} ˆ`m$RÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIES[Function]Destination:Thebitmapthatthedisplaystreammodies.Thiscanbeeitherthescreenbitmap,oranauxilliarybitmapinordertoconstructgures,possiblysavethem,andthendisplaytheminasingleoperation.Initiallythescreenbitmap.[Function][Function]XOset:TheXoriginofthedisplaystream'scoordinatesysteminthedestinationbitmap'scoordinatesystem.Initially0(noX-coordinatetranslation).YOset:TheYoriginofthedisplaystream'scoordinatesysteminthedestinationbitmap'scoordinatesystem.Initially0(noY-coordinatetranslation).Displaystreamshavetheirowncoordinatesystem.Havingthecoordinatesystemlocaltothedisplaystreamallowsobjectstobedisplayedatdierentplacesbytranslatingthedisplaystream'scoordinatesystemrelativetoitsdestinationbitmap.[Function]ClippingRegion:Aregionthatlimitstheextentofcharactersprintedandlinesdrawn(inthedisplaystream'scoordinatesystem).Initiallysetsothatnoclippingoccurs.[Function][Function]XPosition:ThecurrentXposition.Initially0.YPosition:ThecurrentYposition.Initially0.andspecifythe``currentposition''ofthedisplaystream,theposition(inthedisplaystream'scoordinatesystem)wherethenextprintingoperationwillstartfrom.Thefunctionswhichprintcharactersordrawonadisplaystreamupdatethesevaluesappropriately.[Function]Texture:Atexturethatisthebackgroundpatternusedforthedisplaystream.Initiallythevalueof.[Function]Font:AFontDescriptorthatspeciesthefontusedwhenprintingcharacterstothedisplaystream.InitiallyGacha10.Note:determinesitsnewfontdescriptorfrombythesamecoercionrulesthatanduse,withoneadditionalpossibility:Ifisalistoftheformwhereisacceptableasafont-propertyto,thenthenewfontisobtainedby.[Function]LeftMargin:AnintegerthatistheXpositionafteranend-of-line(inthedisplaystream'scoordinatesystem)-initially0.[Function]RightMargin:AnintegerthatisthemaximumXpositionthatcharacterswill19.11(DSPDESTINATION)(DSPXOFFSET)(DSPYOFFSET)(DSPCLIPPINGREGION)(DSPXPOSITION)(DSPYPOSITION)DSPXPOSITIONDSPYPOSITION(DSPTEXTURE)WHITESHADE(DSPFONT)DSPFONTFONTPROPFONTCOPY()FONTCOPY(FONTCOPY(DSPFONTNILDISPLAYSTREAM))(DSPLEFTMARGIN)(DSPRIGHTMARGIN)DESTINATIONDISPLAYSTREAMXOFFSETDISPLAYSTREAMYOFFSETDISPLAYSTREAMREGIONDISPLAYSTREAMXPOSITIONDISPLAYSTREAMYPOSITIONDISPLAYSTREAMTEXTUREDISPLAYSTREAMFONTDISPLAYSTREAMFONTFONTPROP1VAL1PROP2VAL2PROP1PROP1VAL1PROP2VAL2XPOSITIONDISPLAYSTREAMXPOSITIONDISPLAYSTREAM|ïb'îŒ î%”î'*î-Ñ xï\:îC5 ïZ”î¦ î’î"uî'1î* î,tî10î5©î;Óî>÷îAŽîCŠîG€ïXïî¦îèî ÿî"Îî$É î*×î/“î1Lî5 î6Ãî<³îA‡îFÜïWIî¦î„î9î!\î& î)�î+<î,eî0L î6óî<î>lîB¡ïTDîC5 ïRžîC5 ïPøî¦î1î î!“î%‘î'Hî)¦î.Tî3� î:[î>Òî@îBÝ ïORî¦î1 î#ïî(éî.î/8î1µî36 î9ô ïLMî¦î0î î!’î%�î'Hî)¥î.Tî3œ î:[î>Òî@îBÝ ïJ§î¦î1 î#ïî(éî.î/8î1µî36 î9ô ïG¢î¦î¹î!·î%î(Xî+f î22î7Sî<0î>› îEfïEüî¦îîëîsî$Lî(âî-6î1ùî3Ñî5êî<.î=ïîC¤îGãïDWî¦ îNî ¡î%Eî*‚ î15î5¢î:qî<î=á îD×ïAQîC5 ï?¬î¦î"dî$î(‰î+‚î/vî2î6Mî82 î>ÆîCÃîF¥ï>î¦îáî î mî%!î*m î10î6³î;Óî=óî?ºîB‹îD”ï<`î¦ï9[îC5 ï7µîC5 ï6î¦ îoî!Dî& î'•î-Vî2qï3 î¦ înî!Dî& î'”î-Tî2pï0î")î/Jî3Ìî6î;q îAGîBèîE/ï._î¦î©î8î$§î&ÿî)Žî.nî3è î:Ùî?ûîDAîFÐï,ºî¦îÿî#>î&î)*î-cî0Tî6hî:�î> îD�îFnï+î¦î«îÓî‚î#îî(|î,î0, ï(îC5 ï&iî¦î™îRî$%î'î(¸î+D î2÷î7àî;Gî=±î@=îEï$Ãî¦îÂîî"Æî,äï!¾îC5 ï î¦î£îCî ± î'…î*fî/Úî2Lî5Mî8›î×îA îD^ïÇî¦îôî$äî.¾î1î4Œî7) î=Ž îD}ï"î¦îîWî¡îgî Ò}î6î6²î7Nxî9îA»îC4 ï|î¦îlî®î�î#=î+¼î,±î/îî2dî5iî8nî9ñî?¶}ïÖî@þîAšîB6xîCoïÑîC5 ï+î¦ îˆî!èî&Žî)hî*áî-Mî.çî42î7yî9vî< î=Íî@�îBÃîE/ï…î¦îî î#¬î(œî)™î.”ï €îC5 ï Úî¦ î Çî#Wî(/î+:î,ãî/€î6;î8î=ƒî@Ž îG4ïî(!}`m$ìxï\:î ìî*…ïTDî ì î$�ïRžî ì î$‰ïAQî ìî)£ï9[î ì î'Aï7µî ì î'Aï0î¦ î$Ç ï(î ì î$Ëï$Ãî$} ï!¾î ìîØïmî~ïÇî´î'�ï"î$Eî7°ï|î%îAÉïÖî¦î î#j îB˜ïÑî ì î(ï €î ìî(ï"ÿÿÿ}ô`m$lxï\:î]î…î qî$ŸïTDîîÐîlîšïRžîîtî£ïAQîâî�î#½ï9[î¯î,î!Zï7µî¯î,î!Zï(îî·îåï!¾î{î:îÃîñïmî9Cî:ïÇîEòîF±ï"î%î&Ãï¸î(sï"î)ßî*�ï¸î,,ï"î-™î/@ï¸î0ðï"î2\î3 ï¸î4©ï"î=<î>ãï¸î@“ïÖî0î1«ïmî3[ïÖî4Çî5uïmî7ïÖî8�î:(ïmî;ØïÖî=Dî=òïmî?‘ïÑî†îî"1ï €î]îÚî# "} `m$ºÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿDrawingonWindowsandDisplayStreamsbeprintedat(inthedisplaystream'scoordinatesystem)-initiallythevalueof.Thisdetermineswhenanendoflineisautomaticallyinsertedbytheprintingfunctions.Thelinelengthofawindowordisplaystream(asreturnedby,page6.8)iscomputedbydividingthedistancebetweentheleftandrightmarginsbythewidthofanuppercase``A''inthecurrentfont.ThelinelengthischangedwhenevertheFont,LeftMargin,orRightMarginarechanged.[Function]SourceType:Thesourcetypeusedwhenprintingcharacterstothedisplaystream.Mustbeeitheror.Initially.[Function]Operation:Thedefaultoperation(,,,or)usedwhenprintingordrawingonthedisplaystream.Initially.[Function]LineFeed:AnintegerthatspeciestheYincrementforeachlinefeed,normallynegative.Initiallyminustheheightoftheinitialfont(Gacha10).[Function]Scroll:Aagthatdeterminesthescrollingbehaviorofthedisplaystream;eitheror.If,thebitsinthedisplaystreams'sdestinationaremovedafteranylinefeedthatmovesthecurrentpositionoutofthedestinationbitmap.Anybitsmovedoutofthecurrentclippingregionarelost.DoesnotadjusttheXOset,YOset,orClippingRegionelds.Initially.(Note:ifis,theScrolleldischanged,andthepreviousvalueisreturned.)19.9.2DrawingonWindowsandDisplayStreams[Function]Fillsofthedestinationbitmap(withintheclippingregion)with(apatternofbits).Ifis,thewholedestination(withintheclippingregion)isused.Iforare,thevaluesfromareused.[Function]Fillsinacircularareaofradiusaboutthepoint(,)inthedestinationbitmapofwith.'spositionisleftat(,).[Function]SetstheXpositionoftoitsleftmargin,setsitsYpositiontothetopoftheclippingregionminusthefontascent,andllsitsdestinationbitmapwithitsbackgroundTexture.[Function]Changesthecurrentpositionoftothepoint.[Function]Changesthecurrentpositiontothepointcoordinatesawayfromcurrent19.12SCREENWIDTHLINELENGTH(DSPSOURCETYPE)BITBLTINPUTINVERTINPUT(DSPOPERATION)BITBLTREPLACEPAINTINVERTERASEREPLACE(DSPLINEFEED)(DSPSCROLL)ONOFFONOFFNILnot(DSPFILL)NILNIL(FILLCIRCLE)(DSPRESET)(MOVETO)(,)(RELMOVETO)(,)SOURCETYPEDISPLAYSTREAMOPERATIONDISPLAYSTREAMDELTAYDISPLAYSTREAMSWITCHSETTINGDISPLAYSTREAMSWITCHSETTINGREGIONTEXTUREOPERATIONDISPLAYSTREAMREGIONTEXTUREREGIONTEXTUREOPERATIONDISPLAYSTREAMXYRADIUSTEXTUREDISPLAYSTREAMRADIUSXYDISPLAYSTREAMTEXTUREDISPLAYSTREAMXYDISPLAYSTREAMDISPLAYSTREAMXYDISPLAYSTREAMDISPLAYSTREAMXYDXDYDISPLAYSTREAMDXDY|ïb'îÊî"Gî$@î* î,¾î1­xï\:î¦î½îµî tî"Âî%Gî*î/� î6sî;‹î<°îAÒîDWîH&ïZ”î äî!Æî$ã î+éî/¡î1–î4Qî6î8Éî:9 îB«îGãïXïî¦îîA ïUéî ìî Êî‡îÅî…î·îæî±î"hî&Ýî) î.ªî9î9øî=Dî@îAsîGãïTDî ìîCî™îÛî>î”î!î#®î&õî, î.î0iî4@î5ñî7Øî>8îAîBÂîEïRžî ìî Zî0îäîî„îîî$î&zî*+ î1Ïî3‘ î;¹î> ïO™îC5 ïMóî¦ îªî'ý î.Éî1ùî5¢î:× îA6îBÚîE/ïLMî¦î–î &î"î*µî1‚î2]î;¬ïIHîC5 ïG¢î¦ î‹î!Bî+6î1;î7•î<†îBMîC îHàïEüî¦îßî‘î#Îî%�î*Øî,Üî/9î3èî8×îCÔïB÷îC5 ïAQî¦î†î óî%§î(�î. î0„î2+î8¸î;î>ZîDï?¬î¦î’î"®î&Íî)*î-`î/î1uî5]î8Hî=ï<¦îC5 ï;î¦î%î¿î mî#G î*Vî,Âî2Oî8 î9Ðî<<î@ùîEôï9[îÓîîêî"î"êî%Bî'Ûî)‚î+Úî0ƒî6I î=Cî?�îD îG?ï7µî¦îùîÛî$1î&¤î+î0Òî3[î5)î7œ î>³îD'îG>ï6î¦îEîÕî ©î##î(î-jî1Æî45î7¢î;Dî=ÓîAúîDtï4jî¦îî± î(Šî,¢î41î4ûî9WîE#îIï2Äî¦îîìî!î$Ïî*‘î-Fî/£î5-î8Óî:> |ï._î ìîiîçîàîÀî^î$Mxï)ûîC5 ï(Uî¦îöî!¢î#ô î*éî/�î4;î6�î;Êî@wï&¯î¦î¾îíî!î&î-Òî28î3‰î6\î:Û îBQîG€ï% î¦îî!öî#ˆî'ºî/ãî9¢î> î?£îB(îFyï#dî"?î$‘ï ^îC5 ï¹î¦îÓî•îÔî"Úî%æî'³î0üî4ðî7cî;î§î@jîBÝ ïî¦îzî)î2%î=:î>¾îDîE¯îHFïmî¦î÷î'ïhîC5 ïÂî¦î€î×î[î#‘î/Óî1yî3Kî5·î:¶î=Nî? î@¤îEÚîG€ïî¦î6î îƒî#èî(Dî,î.ùî2î6œî9mî<î> îE.ïwî¦î¾î— î$ïqîC5 ïÌî¦î0î�î$Rî)�î5ßî7Œî9éîAºï ÇîC5 ï !î¦î#îrî$*î)Yî*ùî-Hî7! î>UîAÂîEïî(!ÿ}À`m$xïZ”î¦ ïUéî0¬ ïO™î ì î)žïMóî"wïLMî%þî,xî7yïIHî ì î'ÎïG¢î%Çî1´î8Rî=BîD­ïEüî=òïB÷î ì î$oï<¦î ì î(+ï9[î¦î�î eï4jî1¬îF|{ï2Äî"nxï)ûî ìî/üï&¯î/²ï% î<ï ^î ì î-”ïhî ìîgïqî ìî)ïÌî=…î?4î@ãï Çî ì î"Mï !î0×î3Uî5Ó!ÿÿ}ÀÔ`m$ˆxïO™î†îÌî‰î#·ïIHî¯îÍî¹î!çïB÷îØî%îäî£î[î‰ï<¦î* îî"Eï4jî:¥ ï)ûî{î(îÝî!ûî%çî*ï(Uî±îCƒï&¯î( ï% î)bî1Íî5ëï#dî¦îÕï ^îî¹îpîÊî#î'®ï¹î+éî;�î<½ïîVî"„î,Pî3%î7SïmîîOïhîSî�ïÂî%Bî)pïqî¤î\îîCïÌî+Gî/uî>\î@ ï Çî*îùî±î€î8îgï !î1®î2}î4,î4ü!ÿÿ}”P`m$¸ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIESpositionof.[Function]ChangestheXpositiontotheleftedgeofandtheYpositiontothetopoflessthefontheightof.Thisisthebeginningpositionofthetoplineoftextinthisregion.Ifis,theclippingregionofisused.Note:thisdoesnotsettheXpositiontotheleftmarginlikethefunctiondoes.[Function]Backsupoveracharacterwhichisscreenpointswide.llsthebackedoverareawiththedisplaystream'sbackgroundtextureanddecreasestheXpositionby.IfthiswouldputtheXpositionlessthan'sleftmargin,itsoperationisstoppedattheleftmargin.Itreturnsifanybitswerewritten,otherwise.[Function]Printssothatisitcenteredwithinofthe.Ifis,willbecenteredintheclippingregionof.19.9.3DrawingLinesandCurvesInterlisp-Dprovidesseveralfunctionsfordrawinglinesandcurvesontothedestinationbitmapofadisplaystreamorwindow.Thecurvedrawingfunctionstaketheiroperationfromthedisplaystream,whileforstraightlinestheOperationmaybespeciedasanargumenttothedrawingfunction,withthedisplaystream'soperationonlybeingusedbydefault.Thefollowingfunctionsproducestraightlinesofthespeciedwidth(inscreenpoints;thedefaultis1)inthedisplaystream'sdestinationbitmap.Theydonotallow``brush''patterns;however,theydosupportmodeinwhichredrawingalinewilleraseit.Thesefunctionsareintendedforinteractiveapplicationswhereeciencyisimportant.canbeusedtodrawlineswithbrushes.[Function]Drawsalinefromthecurrentpositiontothepointontothedestinationbitmapof.Thepositionofissetto.Ifthedestinationbitmaphasmultiplebitsperpixel,isacolorspecicationthatdeterminesthecolorusedtodrawtheline(Seepage19.44).Ifis,thiswillbetheof.[Function]Drawsalinefromthecurrentpositiontothepointcoordinatesawayontothedestinationbitmapof.Thepositionofissettotheendoftheline.[Function]Drawsalinefromthepointtothepointontothedestinationbitmapof.Thepositionofissetto.[Function]Drawsalinefromthepointtothepointontothedestination19.13(MOVETOUPPERLEFT)NILDSPRESET(DSPBACKUP)DSPBACKUPTNIL(CENTERPRINTINREGION)NILBITBLTINVERTDRAWCURVE(DRAWTO)(,)(,)NILDSPCOLOR(RELDRAWTO)(,)(DRAWLINE)(,)(,)(,)(DRAWBETWEEN)DISPLAYSTREAMDISPLAYSTREAMREGIONREGIONREGIONDISPLAYSTREAMREGIONDISPLAYSTREAMWIDTHDISPLAYSTREAMDISPLAYSTREAMWIDTHWIDTHDISPLAYSTREAMEXPREGIONDISPLAYSTREAMEXPREGIONDISPLAYSTREAMREGIONEXPDISPLAYSTREAMXYWIDTHOPERATIONDISPLAYSTREAMCOLORXYDISPLAYSTREAMDISPLAYSTREAMXYCOLORCOLORDISPLAYSTREAMDXDYWIDTHOPERATIONDISPLAYSTREAMCOLORDXDYDISPLAYSTREAMDISPLAYSTREAMX1Y1X2Y2WIDTHOPERATIONDISPLAYSTREAMCOLORX1Y1X2Y2DISPLAYSTREAMDISPLAYSTREAMX2Y2POSITION1POSITION2WIDTHOPERATIONDISPLAYSTREAMCOLORPOSITION1POSITION2|ïb'îŒ î%”î'*î-Ñ xï\:î¦îãî(°ïY5îC5 ïW�î¦î7îšî!-î&pî(#î*‡î-î0Jî7_î:î<~î>îCSîEîGjïUéî¦î¬î!>î#šî&…î*ºî6…î7_î:vî;ßî>;îD ïTDî¦î~îüî�î!dî#<î&î'Þî*�î/Áî6Óî:ãî;ßî>]îCÆîH&ïRžî"<î#¥î'`î+Kî-çî1î3ƒî5›î7öî9î>ºî@dîB¿îE/ïPøî¦îOî­î)^ïMóîC5 ïLMî¦î±î(žî+Øî-#î3(î7Uî=žîAõîF7ïJ§î î"î$]î(òî+ïî.Ëî1Éî4 î8¡î=Ï îE9ïIî¦îWî Wî"±î$9î)rî/~î0Uî1Òî4mî8”î;î=iî>ñîD*îFºïG\î!»î#î%_î*Rî,î2 î3tî8…î:î§îCÏîE.ïE¶îîaîÿîžî"íî*ü ïB±îC5 ïA î¦î`î î"Ëî$$î%gî*áî4Nî5ôîBTîCï?eî¦î–î\î"î#óî)~î++î-ˆî2Ðî7îBÜ|ï;î ìîiîçî¢î@xï6œî ì îUîÛîIîºî –î"¶î'âî*þî-—î1¼î4Íî7 î=óîB†îD"îE/ï4öî ìîjî?î îî×î"1î(<î+Eî4<î:rî=éî@XîEï3Qî ìî ŸîÝîÅîÿî_î Ýî#áî%Òî+vî-%î/î5<î6ìî9Kî>–îDeîG€ï1«î ìîšîâîîî äî$î&ï.¦î ìî îî'îLîÍî#ßî'Cî)'î+±î1î5‰î7Ûî<=îAîC¢îHsï-î ìî ½î �îîåîR î!wî'î*Ãî,íî/…î3Pî8²î>¡îD¦îGØï+Zî ìîdî'îKî#­î$Çî'lî*î-qî/Dî34î9î;`îAîC5 ï)´î ì î{î�î’îý î+ïî.wî0fî3Ÿî5Lî8»î;óî? ï&¯îC5 ï% î¦î îQî î#Ÿî&î*øî0Pî2î4‘î=î@dîBÝ ï#dî¦îUî(!î(üî+Òî1î=^î>Éî@äîFÅï ^î¦îîh î"Zî&ûî)`î.Çî1Xî3¼î<3î=�î>ªîB ï¹î¦îc î!Tî#¢î' î*6î+Ôî/5î1ƒî4(î7%î:Zî>ëîE!îIïî¦îEîîîÝî(wî4CïîC5 ïhî¦îî]î 3î#¸î&7î+î0|î2Jî4Éî? îFcïÂî¦îÒî. î$-î(Úî4¥î5î8Sî=Žïî¦îî,îÙî6î!ëî#£î&ïîC5 ïqî¦îî7îùî#kî%×î/sî1.î3šî=5î@qîBÝ ïÌî¦îUî(!î(üî+Òî1î=^î>Éî@ãîGðï ÇîC5 ï !î¦îÙîêî…î"Ñî%î/_î0ôî39î=ƒî@˜îBÝ ïî("ÿ}`m$hxïY5î ìî'õïTDî8^ïPøî"!ïMóî ì î"4ïJ§î¦ïE¶î¦î'óïB±î ìî.˜ï?eîï4öî.›ï+Zîäï)´î#Ûï&¯î ìî0Xï% î8Hî9÷î;¥ï#dîB�îD?îEîï¹îF|ïî!;ïî ì î4|ïhî8†î;î=ƒïî ìî7Ëïqî)�î+Åî. î7Dî9ˆî;ÌïÌîB�îDÔîGï Çî ì î?‘ÿ}¨`m$„xï\:î›î"ÉïY5î4îcî#)ïW�î2ïUéî]î,pî0ŸïTDî1bïRžî¦îÕïMóî*îîNïLMîãî"î8âïIî+hïG\î¦îÕïB±î‘î×î$ƒî(±ïA îˆî/î8@îÉî@ãîHëïYVî ìî uî1îšîÎîÆî‰î°î �î%Fî*Ïî,eî/’î3,î6æî9Bî=Ù îDuîEÿïW°î ìîÃîJîMîcîYî²î ×î#©î'üî*ïî0ã î7Þî<]îBþîIïV îSîêîÉî$:î%î&¦î*ˆî-4î.¡î0“î5. î;¢î>îAäîCžîEÿïTeî ìî ²îîòîâîvîúî=î!Ñ î)²î,–î/óî4î8£î:'î=Xî@«îB$îDœîHsïR¿î ìî!î&îOîÃîbîÕî:ïOºî ìî ˆîwîòî¤îbîÑî¥î$þî+î,Åî-ÿî1Òî5¥î90î;|î?5ïNî ìî<îîºî µî#Zî&Aî(Lî. î/Óî1î6Fî;Zî?�îA îH0ïLnî ìîîîÔî¼îsî"œî$î%]î)Xî*ßî0�î4ëî5ãî?YîCTîDÛîH0ïJÈî ìïGÃî ìî ]î wîGî£î¼î·îýîYîÔî!rî#Rî$lî)Òî-Îî/)î3î4—î7¶î;Cî<ëî?:îCÄ ïFî ìî î‰ îªîîˆ î"Fî$ î&fî*Yî,·î.7 î5Mî8î:_î? ïCî ìî à î+îîHî#î¬î” î&õî) î+î04î9Ìî?Sî@ÜîFœîH´ïArî ìî 2î óîîÍîXî‹îRî Æî%Ïî(7î,î-”î1õî5»î8# î>Gî@ŒîBôîH&ï?Íî ìîîîî†îTî “î"Xî$Ãî)âî,Éî/¬î3—î6”î7�î:î>eî@îBŠîG¢ï>'î ìî î?îøîî îî cî$òî*­î-„î0ëî6î;Ëî>ÎîAçîC>îEèîGÙï<�î ìî ðîªîqîtîOîeî$Mî%½î+Xî.Áî1$î7Žî;Eî=¨î?èîAX îHRï:Ûî ìî ¨îkîî‰îüî îî]î#nî)’î+?î-œî2äî8Yî[î@%îB”îH&ï60î ì îoîMîÄî"‡î*Ê î1rî3Ãî66 ï3+îC5 ï1†î¦îàî÷î ãî)Æî+î,6î._î0î5´î7Oî;Hî=“îA€îDîEôï/àîîŠîËî"ƒî&¦î,jî1Ìî3§î62î8¨î<¿î>Bî@îBîGï.:î¦îBî!êî$; î+Gî,ôî3ï+5îC5 ï)�î¦îÔîßî hî"î*ãî.£î0ãî8üî< î>L îE.ï'éî¦î#‘î.žî0î5wî7î9�î?zî@ÜîFÜï&Dî¦îî î$Gî&~î)î.‹î1Ìî4žî86î>ÛîA( îH0ï$žî¦îËï nîC5 ïÈî¦îî&î"‰î%Äî'î+Fî/‰î=„î@\îA¨îE½ï"î¦î&î*7î,Þî5Æî9<î;ã îC-îH&ï}î!»î+�î,ùî/Yî3î4¼î7î;î=Òî?�îDÌï×î¦î„îî&Ö î7Äî9Uî>Äî@`îCîIï1î¦î�î {î"æî$Í î-î/Dî1Ûî7Hî:‰î=Wî@ëîGŒï‹î¦ î²î _î&„|ïhî ìîi îÇ î!¡î%'î'ýxï î ìî®îXî³îYî î$îÙî"Ûî$„î%ìî+2î,Üî. î6Tî;Åî@pîE^îHsïî(!ÿÿÿ}Œ`m$xïW°î>ËîC÷ïV î ì î1î�ïOºî@òîG«ïNî Ëî2îàïLnî 1î2fî7)î= {ï?Íî5xï:Ûî9Ãï60î"î%<ï3+î ì î3ï+5î ì î1ôï)�î4aî6î7¿ï'éî;Fî<ôî>£ï"î ì ï nîï"î0Ãî2rî4!ï×îDÍîF|îH+ï î ÿ}Œ�`m$rxï\[î 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$`m$žÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIESinitializedtobeadisplaystreamatthetopofthescreen,butthatinitialsettingcanbemodiedbythefunction.[Function]Selectsthedisplaystreamorwindowtobetheterminaloutputchannel,andreturnsthepreviousterminaloutputdisplaystream.putsintoscrollingmodeandcallswiththenumberoflinesthatwilltintogivenitscurrentFontandClippingRegion.Thelinelengthofiscomputed(likeanyotherdisplaystream)fromitsLeftMargin,RightMargin,andFont.Ifoneoftheseeldsischanged,itslinelengthisrecalculated.Ifoneoftheeldsusedtocomputethenumberoflines(suchastheClippingRegionorFont)changes,isnotautomaticallyrecomputed.willcauseittoberecomputed.Ifthewindowsystemisactive,thelinebuerissavedintheoldwindow,andthelinebuerissettotheonesavedinthewindowofthenewdisplaystream,ortoanewlycreatedlinebuer(ifitdoesnothaveone).Caution:Itispossibletomovethetoanonvisibledisplaystreamortoawindowwhosecurrentpositionisnotinitsclippingregion.[Function]Setstheshapethatblinksatthelocationofthenextoutputtothe.iseither(1)-nochanges,returnsarepresentingthecurrentcaret,(2)-turnsthecareto,or(3)awhichgivesthenewcaretshape.Thehotspotofindicateswhichpointinthenewcaretbitmapshouldbelocatedatthecurrentoutputposition.Thepreviouscaretisreturned.[Function]Ifisgreaterthan0,itisthenumberoflinesofoutputthatwillbeprintedtobeforethepageisheld.Apageisheldbeforethe+1lineisprintedtowithoutinterveninginputifthereisnoterminalinputwaitingtoberead.Theoutputisheldwiththescreenvideoreverseduntilacharacteristyped.Outputholdingisdisabledifis0.returnstheprevioussetting.19.11CURSORANDMOUSEThescreenrelativepositionatwhichthecursorbitmapisbeingdisplayedcanbereadorsetusingthefunctions:[Function]Thisreturnsthelocationofthecursorinthecoordinatesystemof(thecurrentdisplaystream,ifis).Ifisa,itwillbereused,andreturned.Ifisnon-,itshouldbeapositionandthecursorwillbepositionedat.19.15TTYDISPLAYSTREAM(TTYDISPLAYSTREAM)TTYDISPLAYSTREAMPAGEHEIGHTTTYDISPLAYSTREAMPAGEHEIGHT(TTYDISPLAYSTREAM(TTYDISPLAYSTREAM))TTYTTYDISPLAYSTREAM(CARET)TTYDISPLAYSTREAMNILCURSOROFFCURSOR(PAGEHEIGHT)TTYDISPLAYSTREAMTTYDISPLAYSTREAMPAGEHEIGHT(CURSORPOSITION)NILPOSITIONNILDISPLAYSTREAMDISPLAYSTREAMDISPLAYSTREAMDISPLAYSTREAMNEWCARETNEWCARETNEWCARETNNNNNEWPOSITIONDISPLAYSTREAMOLDPOSITIONDISPLAYSTREAMDISPLAYSTREAMOLDPOSITIONNEWPOSITIONNEWPOSITION|ïb'îŒ î%”î'*î-Ñ xï\:î ì îBî÷îíîîÓîFîåî"Iî$Äî&ƒî(çî-~î0î2×î6Æî;/î=¿î?¶îE~îG€ïZ”î ìîÒïW�îC5 ïUéî¦î>î¯î \î#rî'òî)Éî+îî9±î;rî=uî?çîA~îEoîG^ïTDî¦îqî÷î€î$î&4î(#î+’î-)î0Úî2Éî5î6Èî9žïRžî¦î%î'Øî*úî-Aî0þî3žî?jîBmîD¶îGjïPøî¦î4îBîåî!dî"óî0î3•î5Eî7)î9àî=î?›ïORî¦îW î ˜î/úî1@î3½î7‚î:î<øî@oîBîDøïM­î¦îîë î$“ î-î/Ñî3¹î5>î7ëî9¦î=0î@ÏîB>îHïLî¦ îîcî".î#Žî'sî(êî+‰î-7î/Šî3î6Lî7ïî:lî=†î?ÚîBŽîD÷îF¥ïJaî¦îVî îp î)cî+-î/î=„î>÷îArîF¥ïH»î¦îLî@îBÓîF°îH0ïGî¦î•î<ïDî¦îîeî |î$ãî&>î*rî,¿î/dî3hî4Ãî8{î:îî"Þî&Æî(1î*bî,¿î/hî0ôî3%î6î7õî:Gî;ÈîKkï7)î^î ôî%î*Žî+¶î-æî3œî8vî?„îArîB›îG€ï5ƒî¦î‹îsî /î%nî&sî*î,fî/Èî2Dî4î6<î=îAîDŒîFòï3Ýî¦î"îéî"áî'éî1qî2™î3Âî7>î;jî?(î@öîCvîFƒï27î¦î>î€î!#î#=î$[î("î)äî,mî.Qî1]î3Lî5öî8^î<8î?8îA'îDíîHsï0’î¦ï-ŒîC5 ï+çî¦îºî7î ãî$î%½î'%î(£î+î0Nî2î5dî7.î;°î>�îAKîCMîH0ï*Aî%¾î*+î,ªî0î1œî5�î7Jî:¯î<;î?uîCâîGJï(›î¦î|îî øî0Ýî6 î=]îA%îB¦îFMîGÙï&õî¦îüî †î%8î&Çî(˜î,)î.áî31î4~î7yî:sî<³î@ËîDiï%Pî¦îîdî"oî$î(Òî-Àî2îî4�î:î=/î>Âï#ªî¦îUî²î$<|ï†î ìîiîæî�xï"î ìî ÓîîîTîüî!î#‡î'Ãî,ƒî-ÿî1Øî8î:žî<žî?ÇîA›îCÈîG€ï|î ì ïwîC5 ïÑî¦îªîEî!Žî&¬î(Pî*šî.°î0Iî2“ î9=î=¡ï+î¦î´î°î$–î)Ÿî6î:-îî<½î>îCYîD#îEeï àî¦î•î¾îûî"°î% î)7î+àî-Ï î4wî>­ïî( ÿ}$`m$ÂxïZ”îaïW�î ìî# ïTDî>~ïRžî6• ïORî"*ïJaî4‘ ïH»î :î/ZïDî>½ï?î{ï:tî ìîÖï8Îî=úï7)î'Yî9Êï5ƒî"]î7mï-Œî ì îéï*Aî¦ï(›î"Æï%Pî@ò ïwî ìî4ï+î7¨ï…î¦î@Ô!ÿÿ}$ `m$dxïW�î î:ïUéî/î32ïRžî”îÂïPøî%Ÿî)Íï:tîÍîŸï7)î¦îxï3Ýî)Âî,”ï-Œîï+çî:ï*AîFbï%Pî;›ïwî] î Ýî% î+Ñ ïÑî?DîCsï+î+6î/dî> ï…î3¬ ï àî6 !ÿÿ}0°`m$`ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿMouseButtonTesting[Function]MovesthecursorpointsintheXdirectionandpointsintheYdirection.anddefaultto0.Thecursorcanbechangedlikeanyotherbitmapbyingintoitorpointingadisplaystreamatitandprintingordrawingcurves.Formostapplications,itisalsonecessarytolocatethe-apointwithinthebyareawhichisusedtodetermineapositionforthecursor.Alsoforsomeapplicationsitisnecessarytosaveandrestorethecursor.TheCursorrecordandthefollowingfunctionsprovidethesecapabilities.ACursorrecordhaseldsand,thelatterathatgivesthelocationofthehotspotinsidethecursor.[Function]Returnsacursorobjectwhichhasasitsimageandthelocation(,)asthehotspot.Ifisa,itisusedasthehotspot.Ifhasdimensionsdierentfromby,thelesserofthewidthsandthelesseroftheheightsareusedtodeterminethebitsthatactuallygetcopiedintothelowerleftcornerofthecursor.Ifis,0isused.Ifis,-1isused.Thedefaultcursorisanuparrowwithitstipintheupperleftcorneranditshotspotat(0,-1).[Function]Returnsarecordinstancethatcontains(acopyof)thecurrentcursorspecication.Ifisarecordinstance,thecursorwillbesettothevaluesin.Ifis,thecursorwillbesettothedefaultcursor,anupwardleftpointingarrow.[Function]Ifisarecordinstance,thecursorwillbesettothevaluesin.Thisdoesnotreturntheoldcursor,andtherefore,providesawayofchangingthecursorwithoutusingstorage.[Function]Invertsthecursor.ThereareseveralcursorsdenedinInterlisp-Dthatmaybeofinteresttousers.Oneoftheseis,anhourglassshapeusedbythesystemtoindicatethatalongcomputationisinprogress.scanbesavedonaleusingthelepackagecommand,orthelepackagecommand.19.11.1MouseButtonTestingTherearevariousgraphicalinputdevicesthatcanbereadfromInterlisp-D.Thedevicesusedinthismannerare:adevicecalledamouse,whichhasthreekeysandsteersthecursor,andsevenuninterpretedkeysonthekeyboard.(SomeXerox1100systemsmayalsohaveasmall,ve-keykeyset.)Thefollowingmacrosareprovidedtotestthestateoftheseinputdevices.(Thethreekeysonthemouse(oftencalledbuttons)arereferredtobytheirlocation:left,middle,orright.)[Macro]Readsthemousestateandreturnsifthatstateisdescribedby.19.16(ADJUSTCURSORPOSITION)BITBLThotspotCURSORWIDTHCURSORHEIGHTpointCURSORBITMAPCURSORHOTSPOTPOSITION(CURSORCREATE)POSITIONCURSORWIDTHCURSORHEIGHTNILNILCURSORHEIGHTCURSORHEIGHT(CURSOR)CURSORCURSORTDEFAULTCURSOR(SETCURSOR)CURSOR(FLIPCURSOR)WAITINGCURSORCURSORCURSORSUGLYVARS(MOUSESTATE)TDELTAXDELTAYDELTAXDELTAYDELTAXDELTAYBITMAPXYBITMAPXYXBITMAPXYNEWCURSOR_NEWCURSORNEWCURSORNEWCURSORNEWCURSOR_NEWCURSORNEWCURSORBUTTONFORMBUTTONFORM|ïb'î"Ûî'gî+þxï\:îC5 ïZ”î¦î$î“î(!î,Sî.î0�î2î7óî?òîD$îEâîHRïXïî¦ î#+î+î/ªî1WïUéî ìî Îîîšî–î îÂî lî$î(Ðî/áî2Jî5,î6Žî8\î=Ýî?îCÍîHFïTDî ìî aî5î’îuîÜî î"Éî&B î.Qî/Æî1Pî4:î:hî<4î@HîG˜îH´ïRžî ìî î·îÆî*Hî-5î17î2™î5Êî7nî=âîBmîG¢ïPøî ìî Uî%î]î¤î@ î!Ûî#;î$±î*Ëî,ƒî/�î2Qî6Þî9Gî>î@ùîE’ïORî ìî ±îî;îDî [î#ñ î+»î-Wî1ôî6Pî8ÓîG(ïM­îØî´îî¢î$î&Òî*Aî,žî1Ðî3ˆî5åî8Xî;Oî?MîAªïJ§îC5 ïIî¦îêî%î"`î&‡î*¢î2gî4%î6î:)î<ðî?^îD¢îEóîG"îH0ïG\î¦î2îÔî Ûî$î%®î-¾î.Éî0Lî1æî5Mî7)î9µîDî?CîAÅîE¤îG€ïDî¦î'îúî!vî%Pî'&î)¢î.zî0êî4Bî6 î<¨î?$îAáîDËïBkî¦îõîkî!Iî#®î'}î)øî.Lî0 î2qî78î:%î>î?î@=îA°îE†îHsï@Åî,î%)î%¢î&ãî([î,>î/ î3Òî8 î9�î;|î@ýîD"îFîH0ï?î¦îîî uî$Áî'uî)Nî+Áî.¸î0Oî;åî<^ï<îC5 ï:tî¦îî$ î(‚î-ôî0éî6qî8=î;µî=î>=î@ÄîE³ï8Îî¦ î î*î+�î2cî6»î×îCîEÆîGÂï7)î¦îjîÞî î)Âî*´î4Æî7î8î:„î>ÆîA…îC‹îE¼îG€ï5ƒî¦îJî+aî,=î.+î3'î5šî;ï2~îC5 ï0Øî¦î!nî"Êî)dî-¡î36î5…î9¡î<;î>î@(îAÆîDîH0ï/2î‡î sî#œî&Ûî)_î-œî0 î2„î7î9â î@2îEÎîGï-Œî¦î^î5î!’î%½î*Äî.jï*‡îC5 ï(áî¦î>îœï%Üî ìî/îÆî˜îŒî·î!© î'î(úî, î/Rî1†î3ƒî8£î:•î?dîBªîD§îHsï$7îØîáîþîzîêî"öî&]î(„î+î/´î1Žî6äî9Ýî;3î>x îF˜îH0ï"‘î ìïŒîöîèî[î4îåîÔîæî"î ³î"úî%6î*]î6„î7Jî8öîBdîD ïæî ì|ï�î ìîiîöî�xïî ìîî„îlî~îIî$2î'"î)Ïî+âî/î2§ î8î:-î='îBîEmîG>ïwî ìîèî­îÌîîíî îÞî ²î$³î'î*˜î-¥î0Qî4î6bî:Ýî=ˆîAE ïÑî ìî îîaîçî1î Oî#‘î(‹î+‹î.Tî1—î2¾î6°î9Dî;Öî@üîCÐï+î ìî¡îúîÎî‚îîxî ®î"mî%úî)©î/î2^î5ëî9 î;î={îAØîEéï…î ìîVî§îäî‘î‹îÏî#zî&Eî+@î-ï €îDÁï Úî¦îÚîKî"µî%öî(¿î.ðî0dî3Cî6…î8î><îIïî( ÿÿ}È`m$ôxï\:î ìî&¦ïUéî*×{ïTDîBÅxïRžî î· {î?xïORî< ïM­î ì îÊïJ§î ì îÊïG\î'ïE¶î(+ î4/ ïBkî;˜ï@Åî¦î ï?î1Ð ï<î ìî�ï:tîUï8Îî,Çï7)î6Gï5ƒî u ï2~î ì îï0Øî#äï*‡î ì ï$7î ì ïŒî ìî0¢î;=ï €î ì î¹ï Úî-�"ÿÿ}È`m$|xï\:îhîµîtî"î$Pî%î%ÎïZ”î"Ðî%î%Üî:¹î=î=Æî>„ïXïîëî 8î ÷î%ßî(-î(ìî)ªïJ§î¯î:îòïIî-'îEîFJïG\î"ŠîB ïBkî8ÁîGï<î¤îvîeï8Îî!§î$yï7)î!âî$´î,Kî/ï2~î*îüîêï0Øîîêï/2î¦îxï €îîßï Úî@JîF(!ÿ}ä”`m$ŠÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIEScanbeoneofthekeyindicators,,or;theatom(indicatingallkeysareup);theform;oraformof,,orappliedtoanyvalidbuttonform.Forexample:willbetrueiftheleftmousebuttonisdown.willbetrueiftheleftmousebuttonistheonlyonedown.willbetrueifeithertheleftmousebuttonisuporthemiddlemousebuttonisdown.[Macro]Similarto,butteststhevalueofratherthangettingthecurrentstate.Thisisusefulfordeterminingwhichkeyscausedatobetrue.[Macro]isasdescribedin.Waitsuntilistrueoruntilmillisecondshaveelapsed.Thevalueofisifwassatisedbeforeittimedout,otherwise.Ifis,itwaitsindenitely.Itcompilesintoanopenloopthatcallsthewaitbackgroundfunction.Thisformshouldnotbeusedinsidethewaitbackgroundfunction.doesnotuseanystorageduringitswaitloop.Themacrosandareidenticaltoandexceptthattheyalsocheckthestateoftheve-ngerkeysetaswellasthestateofthemousebuttons.Thatistheycheckthestateofboththemouseandthekeyset.Thus,iftheleftmousebuttonwastheonlymousebuttonhelddown,wouldbeeventhoughakeysetkeywasdown;whereaswouldbeifakeysetbuttonweredown.Thenamesofthekeysetkeysare:,,,and.19.11.2LowLevelAccesstoMouseThissectiondescribesthelowlevelaccesstothegraphicalinputdevicesandcanbeskippedbymostusers.Graphicalinputinformationisrepresentedinthefollowingglobalvariables:[Variable]TheXpositionofthecursorinabsolutescreencoordinates.Alsoseethefunctionbelow.[Variable]TheYpositionofthecursorinabsolutescreencoordinates.Alsoseethefunctionbelow.[Variable]An8-bitnumberthathasbitsoncorrespondingtothemousebuttonsthataredown:istheleftmousebutton,istherightbutton,isthemiddlebutton.(Bits,,,,andgivethestateofthekeysetkeys,fromlefttoright,ifyouhaveakeyset.)19.17LEFTMIDDLERIGHTUP(ONLY)ANDORNOT(MOUSESTATELEFT)(MOUSESTATE(ONLYLEFT))(MOUSESTATE(OR(NOTLEFT)MIDDLE))(LASTMOUSESTATE)MOUSESTATELASTMOUSEBUTTONSMOUSESTATE(UNTILMOUSESTATE)MOUSESTATEUNTILMOUSESTATETNILNILTTYTTYUNTILMOUSESTATEKEYSETSTATELASTKEYSETSTATEMOUSESTATELASTMOUSESTATE(MOUSESTATE(ONLYLEFT))T(KEYSETSTATE(ONLYLEFT))NILLEFTKEYLEFTMIDDLEKEYMIDDLEKEYRIGHTMIDDLEKEYRIGHTKEYLASTMOUSEXLASTMOUSEXLASTMOUSEYLASTMOUSEYLASTMOUSEBUTTONS4Q2Q1Q200Q100Q40Q20Q10QBUTTONFORMKEYBUTTONFORMBUTTONFORMINTERVALBUTTONFORMBUTTONFORMINTERVALBUTTONFORMINTERVAL|ïb'îŒ 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î@9îBÆîHïî ì î‰î’îoî î!î&î(î-[î1î8pîAÓîBáîGjï^î ìî öî$îìî d î'€î.xî0ä î8Xî;‹î>îBTîFæï¸î ìî }î°ï ³î ìî ¥ î• î5îî"çî'"î-î1Õî3�î6 î;&î=”îBÌîGTï î ìî ÛîHîbî�îÔîØî÷î"î$mî*yïî("ÿÿÿ},`m$>xï\:î ì ïZ”î1î9ÊîE ïXïîhî%èî2iî>ÔïTDî ì ïPøî¦ î#– ïIHî ì îïD�î ì îï?òî ì îhï<¦î%bî+î?Ï ï;î8î<\îBIï9[î# î)¦ î5Lî=– ï7µî[ï4°î ìï3 î@š ï1eî¦ î Ëî.û î== ïî2Ñî:Dï^î },<`m$pxïIHîî/ïG¢î>íîCïD�îî/ïB÷î>íîCï?òî†î îÉï>Lî>™îEîEÜï<¦î¦î*îé"ÿ}hX`m$:ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIES[NoSpreadFunction]Thewindowworldisturnedonifisandoifis.returnsthepreviousstateofthewindowworld(or).Ifisgivennoarguments,itsimplyreturnsthecurrentstatewithoutaectingthewindowworld.19.12.1WhatareWindows?Awindowspeciesaregionofthescreen,adisplaystream,alocationinanocclusionstack,functionsthatgetcalledwhenthewindowundergoescertainactions,andvariousotheritemsofinformation.Thebasicmodelisthatawindowisapassivecollectionofbits(onthescreen).Ontopofthisbasiclevel,thesystemsupportsmanydierenttypesofwindowsthatarelinkedtothedatastructuresdisplayedinthemandprovideselectionandredisplayingroutines.Inaddition,itispossiblefortheusertocreatenewtypesofwindowsbyprovidingselectionanddisplayingfunctionsforthem.Windowsareorderedindepthfromusertobackground.Windowsinfrontofothersobscurethelatter.Operatingonawindowgenerallybringsittothetop.Windowsarelocatedatacertainpositiononthescreen.Eachwindowhasaclippingregionthatconnesallbitssplashedatittoaregionthatallowsaborderaroundthewindow,andatitleaboveit.Eachwindowhasadisplaystreamassociatedwithit,andeitherawindoworitsdisplaystreamcanbepassedinterchangeablytoallsystemfunctions.Therearedependenciesbetweenthewindowanditsdisplaystreamthattheusershouldnotdisturb.Forinstance,thedestinationbitmapofthedisplaystreamofawindowmustalwaysbe.TheXOset,YOset,andClippingRegionattributesofthedisplaystreamshouldnotbechanged.Atsomefuturedate,thenotionsofwindowanddisplaystreamwillbemerged.Windowscanbecreatedbytheuserinteractively,underprogramcontrol,ormaybecreatedautomaticallybythesystem.Windowsareinoneoftwostates:``open''or``closed''.Inan``open''state,awindowisontheocclusionstackandthereforevisibleonthescreen(unlessitiscoveredbyotheropenwindows)andaccessibletomouseoperations.Ina``closed''state,awindowisnotontheocclusionstackandthereforenotvisibleandnotaccessibletomouseoperations.Anyattempttoprintordrawonaclosedwindowwillopenit.WhenInterlisp-Dstartsup,therearethreewindowsonthescreen:atopleveltypescriptwindow,awindowcontainingtheInterlisp-Dlogo,andapromptwindow.Thetopleveltypescriptwindowcorrespondstotheleintheprocesswheretheread-eval-printloopisoperating.Thelogowindowisboundtothevariableuntilitisclosed.Thepromptwindowisusedfortheprintingofhelporpromptingmessages.Itisavailabletouserprogramsthroughthefollowingfunctions:[Variable]Globalvariablecontainingthepromptwindow.[NoSpreadFunction]Printsinthepromptwindow.[Function]Clearsthepromptwindow.19.19(WINDOWWORLD)TNILWINDOWWORLDTNILWINDOWWORLD(SCREENBITMAP)TEXECLOGOWPROMPTWINDOW(PROMPTPRINT)(CLRPROMPT)FLAGFLAGFLAGEXPEXP|ïb'îŒ î%”î'*î-Ñ xï\:î<µîC˜ïZ”î¦î\îcî#+î$uî(Ãî*§î/‘î2î4¬î6¦î;�î?`ïXïî¦îfîÕî$qî'°î)yî+èî1 î5î6ÿî;Xî= îHsïWIî¦î:î" î$ î%Cî)’î.$î0dî5 î8î=îBvîD¶ïU£î¦|ïQ>î ìîiî0î�xïLÚî ìî �îÉî=î|îÑîžî î$ºî%øî*¼î/œî0Úî6"î7äî9éî@îCäïK4î ìî ½î îîºîîJî$áî)jî.aî1î5åî9‡î=3î>ð îGïIŽî ìî Tî�îäî¨îÉîèîKîlî# î):î*êî-�î/÷î2Mî7{î9Ðî<<î=ëî@ƒîCëîG€ïGèî ìî_îæîªî0î ½î"qî(î*àî-.î1_î3 î5bî8a î>˜îD®îFWïFCî ìî “î‹îîÅ î!gî'-î(íî.¤î/ëî1Hî6xî8¥î:õî=Þî?}îCnîFLïD�î ìî £îNîHî�î!î!Ö î(]î.Uî0‘ïA˜î ìîîXî{î.îî ‰î#‡î%: î-Vî3jî5î8”î:Rî>xîC‘îEõï?òî ìî]îaîŠî±î’î"¼î$î%¾î(ï<íî ìîðî8îèîvî•îî#Bî%=î'‘î,Fî/¬î4Éî73î8Rî=‘îAÇîDŠï;Gî ìî ÚîyîîšîïîœîÅîî Ðî$ùî&"î*™î/Sî1°î7.î9ãî; î=×îAÕï8Bî ìî �îäîˆîâîÁî ^ î&öî*?î,)î/î3)î4‚î9Úî;Îî=ØîB·îGTï6œî ìî êîZîJîîî"‰ î)2î-@î/  î8&î=žî@ îE@îHï4öî ìîŠîçî£îñîØî@î!¤î&Ñî)jî.þî1L î8=î<Üî>„î@ÒîEqï3Qî ìî ¶î òî,î¤îî'Ýî)î,î1ˆî7î9Ð îCÎ ï1«î ìî ·î(îêîjîöî}î €î&©î(¶î,Zî0Žî4î6rî;`î=+îBfîE/ï0î ìîXîîðï-î ìîåîYî4îäîÊîîõ î'÷î+áî1Wî6Lî7úî:çî<ÁîAr ï+Zî ìî æîCï(Uî ìî÷îGîòîšîOî÷î!î#îî%¯ î+¼î-‡î/tî4Bî7Æî8íî>î?{îA~îCÚï&¯î ìî hî)îînîîèî#*î'Îî)0î*¦î/Ïî1Õî5}î8ùî?(îAê îH0ï% î ìîP î¦î‚î¹ îQî!éî# î(Uî)Îî,Oî.bî0Îî6ßî:]î=!îCîE’ï#dî ìî  î îMîúîP î"{î%{î*ƒî,/î/”î1Vî4Æî6Êî7óî<îADîCíîG\ï ^î ìî Ý îFîÅî3îîâî î#tî(üî*Ýî-î1´î2ºî5 î8* î>NîC°îD¶ï¹î ì î«î î}î+îžî _î!”î&†î,Uî/6î1¶î5 î;Wî@Š îH0ïî ìî Gîïî™îÒîžî °î# î&î(íî,Oî/oî0× î7sî:Fî=OîBsîCÛîH0ïmî ìî Mî>î†îßîMî!î#àî(Êî-ôî/cî2 î4ßî7@î<�î>=îAYîCïÇî ìîEî»î&îÛîˆîî#Œî(¿î+î1) ïÂîC™ ïî¦î>î!p î(#î*€î/fïî<µîC˜ïqî¦î„î 0î"Žî'sï lîC5 ï Çî¦îÛî8î#ïî(!} x`m$0xï\:î ì îïZ”î0Üî<Ûî@ ïXïî5“î8Óî>Ÿ ï3Qî ïî–îôïmîƒïÂî ì ïî ì î>ï lî ì ÿÿÿ} xh`m$î-áî00î4Mî5©î9™î:´î?ÌîD+îFæïOÝî ìî ¤îfîÓî îÆî|î9î!¦î$(î&íî(%î,î-Úî3 î9Èî;„î@¹îBJîC‚ïN7î ìî iî£îîÌî¼îAî# î%yî(Ûî-Cî/éî3­î6î:Zî;×î?î@<îG€ïL‘î ìîîî¯îŽîdî î"Mî'dî)î,úî/Gî3î5­î:Ðî=^î?=î@—îEÃîGîïJìî ì îkîäî�î¹î î$ î%²î,¦î0ìî3üî5ºî9/î<êî@_îAºîBÒ ïIFî ìî ¸îîºîîôî õî"åî(î*)î,# î2âî9÷î<‹î@=îB›îFÆîH0ïG î ìî IîÌîŽîî½îæî�î"$î%gî)zî,P î2÷ïD›î8Çî>´îB½ïBõî¦îî‹î#Ûî&¹ î-Ëî/Jî1 î3¦î6Bî;î<úî?€îBjîEGîG(ïAOî¦î(î…î"„î$÷î)Bî*ùî-Wî2}î4wî6Ôî;Ûî=’î?ïîBÛï>Jî8Çî>´îB½ï<¤î¦îñîNî#Ìî&î+oî,Äî0(î2…î7=î?Tî@0îCsï9Ÿî8Çî>´îB½ï7ùî¦îøî›î#î%Qî'óî,ýî.úî1œî7åî<îADîG?ï6Tî¦îQî î!rî$ï3Nî8Çî>´îB½ï1©î¦î<îÄî$î%ìî'?î,œî2gî4‹ î;sî>SîA îG€ï0î§îî$î&Ãî*î+Oî/î3)î5òî;;î?oîAíîG4ï.]î¦îQî!î#`î%óî'^î-(î;øî<Ôî@ï+Xî8Çî>´îB½ï)²î¦îEîµî!¿î#~î(*î)eî,cî0¶î3î5tî:�î?ÆîEìîG€ï( î–î8î²î"úî$·î)_î+Ëî.Æî3pî5Ýî;¹î@ïîCˆîE†ï&gî¦îNî¯î'\î)Ðî+î.“î0Ñî4Üî7fî:Tî<¨îAyîBñîE/ï$Áî¦îþîÂî -î%?î*Îî.åî0\î4~î6Æî;·î?^ îFûîH´ï#î¦îÍî™î!î%Ò î,z ï î8Çî>´îB½ïpî¦ î…î âî&Œî2î2Üî6ïkî8Çî>´îB½ïÅî¦îbî*î mî$Zî&"î*Fî,¿î1î3§î5±î9î;Éî= î@­îD¦îFnï î¦î\î�î Rî#sî$æî)î+Hî05î3Ùî5çî7î<Ýî@úîGJïzî¦î-îoî *î"—î'�î+¾î3âî6‘î8îï Þî¦îaî™îÎî"’î&]î'Áî)|î+èî1%î52î7’ î>^î@qîBÝ ï 8î¦î]îîÂî!!î&Vî)$î,µî1Éî4tî8bî9åîJî ìï<¤î:Jï9Ÿî ìï3Nî ìï0î¦ï.]î05 ï+Xî ìï( î¦ï&gî!íï î ìïpî)™ ïkî ìï îCaïzî.8ïÔî¦ ÿ}Èp`m$PÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIEStheentirewindowcorrectly,tryasmallerwindoworonewithfewerblackbitsinit.Togetahardcopyofanarbitrarypartofthescreenthatcrosseswindowboundaries,usethecommandinthebackgroundmenu(below).[WindowMenuCommand]Promptsforaregiononthescreenandmakesanewwindowwhosebitsareasnapshotofthebitscurrentlyinthatregion.Usefulforsavingsomeparticularlychoiceimagebeforethewindowimagechanges.Occasionally,auserwillhaveanumberoflargewindowsonthescreen,makingitdiculttoaccessthosewindowsbeingused.Tohelpwiththeproblemofscreenspacemanagement,theInterlisp-Dwindowsystemallowsthecreationof.Aniconisasmallrectangle(containingtextorabitmap)whichisa``shrunken-down''formofaparticularwindow.Usingtheandcommands,theusercanshrinkwindowsnotcurrentlybeingusedintoicons,andquicklyrestoretheoriginalwindowsatanytime.[WindowMenuCommand]Removesthewindowfromthescreenandbringsupitsicon.(See,page19.27.)Thewindowcanberestoredbyselectingfromthewindowcommandmenuoftheicon.Ifthebuttonispressedwhilethecursorisinanicon,thewindowcommandmenuwillcontainaslightlydierentsetofcommands.Theandcommandsareremoved,andthecommandisreplacedwiththecommand:[WindowMenuCommand]Restoresthewindowassociatedwiththisiconandremovestheicon.(See,page19.28.)Ifthebuttonispressedwhilethecursorisnotinanywindow,a``backgroundmenu''appearswiththefollowingoperations:[WindowMenuCommand]Callsthefunction(page18.4),whichwritesoutallofthedirtypagesofthevirtualmemory.Aftera,anduntilthepagefaulthandlerisnextforcedtowriteoutadirtypage,yourvirtualmemoryimagewillbecontinuable(asofthe)shouldyouexperienceasystemcrashorotherdisaster.[WindowMenuCommand]Thesameasthecommanddescribedabove.[WindowMenuCommand]Promptsforaregiononthescreen,makesapressleandsendsittotheprinter.Theprintingisdonewith(page18.18),soifisnon-,theimagewillbesentthere,ratherthanto.Somebuilt-infacilitiesandLispuserspackagesaddcommandstothebackgroundmenu,toprovideaneasywayofcallingthedierentfacilities.Theusercandeterminewhatthesenewcommandsdobyholdingthebuttondownforafewsecondsovertheiteminquestion;anexplanatorymessagewillbeprintedinthepromptwindow.19.21HARDCOPYSNAPIconsSHRINKEXPANDSHRINKSHRINKWEXPANDRIGHTREDISPLAYCLEARSHRINKEXPANDEXPANDEXPANDWRIGHTSAVEVMSAVEVMSAVEVMSAVEVMSNAPSNAPHARDCOPYHARDCOPYWFULLPRESSPRINTERNIL(PRINTINGHOST)RIGHT|ïb'îŒ î%”î'*î-Ñ xï\8î¦î+î;î#‰ î)²î+ÿî-Oî2:î7ˆî9rîïZ’î¦îsî­îóî Zî!£î'Èî) î+¯î1oî4qî6Iî8Çî=î@ îD¶ïXìî¦ î î!|î+î1qî3î5z î<þî@ÜïUçî8Çî>´îB½ïTAî¦î?îžî ëî%Oî'xî)ùî.Sî1,î5…î6Òî9âî?-îC{îF?îH´ïRœî¦îfî1î!¢î$Uî*Aî,î.áî3ßî8_î:®î>÷îB› ïPöî¦îçîðî$;î&˜î+¿î/ÈïMñî ì î)îCî,îÆîüîî"/î#Ùî'.î,Êî.Áî1î5‘î:gî;®î@§îBFîFAïLKî ìîµîœîµîúî1î hî"äî(‚î*Yî.­î2~ î;î=Œ îBõîD¶ïJ¥î ìîpî§îî]îHî yî"×î%çî'_î(•î,>î2" î9\î<î=ïî?%îD[îHsïHÿî ìî ! îÉîMî¾îƒî¹ î"öî(Çî,Òî4Øî=5îD|îFæïGZî ìî xî°î^îÕî°î"zî%·î(�î,qî/)î4î8�î:îî?öîE¤îG?ïE´î ìïB¯î8Çî>´îB½ïA î¦îÄî Sî%¬î)Bî+Ñî08î3î7zî9¼î;Çî>Eî?áîIï?cî¦îõî¬î"�î'¿î*Sî,Mî1 î3¥î>ßîBNîD¶ï=¾î¦îî!ßî#–î%ôï:¸î ìî wî¢îî�î€î!<î#¤î'Ùî)Oî+î-î/}î0gî2Ïî8î>fîBOîEï9î ìî >î-îáî&îî!èî-%î4åî;îî>jîD¡îG€ï7mîzîÕî@îÀîØî'Ãï4hî8Çî>´îB½ï2Âî¦î î?î$> î*}î-mî/åî2¿î5Lî:�î<Ãî@:îIï1î¦îêï.î ìî ‡îÑîZîßîßî!«î$#î(iî)îî,{î.Cî0üî6œî7à î@/îD×ï,qî ìî îaîn ï)lî8Çî>´îB½ï'Æî¦îCîÍî),î-î1 î5Aî9mî<î>*î@îB™îFï& î¦îvîëî Zî&Žî*Aî0Œî1€î4Mî7©î:î@/îENîFÐï${î¦îÿîÄî!Wî#ãî%$î(‹î,Eî/•î4î9…î=¦î@gîBn ï"Õî¦îÌîƒî"ëî#çî(_î+ î1çî3î7‡î;î<Úî@vïÐî8Çî>´îB½ï*î¦î|îöî¢î%àî,;î2`ï%î8Çî>´îB½ïî¦îîUî ~î$½î&Âî)î-¬î1áî3 î6ƒî8Õî;Šî?Fî@›îBHîD¥ïzî¦î’îåî!eî$êî0Bî4î8šî:rïÔî¦îîUî1î!Žî%—î(?î*.î-î0íî4öî8îEŠïÏî ìî ÖîîÕ îKîî!?î'î)æî0Þî2£î5 î<¶îA îBÐîGîï)î ìî îîïîwîûî­ î%î(î+î-Îî4qî7òî;Ÿî>±îE·îGãïƒî ìî îQî×î·î! î"Mî%î*.î-^î/Ôî3î4Ôî:ýî= îD‹ï Þî ìî •î„îTîî^îDïî(}`m$ÆxïXìî#ÙïUçî ì{ïJ¥î#xïHÿî/<î7™ïB¯î ìïA îC ï?cî9Eï:¸î ßï9î$çî0ï7mî ìî"5ï4hî ìï2ÂîC ï.î ÿï)lî ìï'Æî#pï& î+‚ï"ÕîàïÐî ìï*î"ï%î ìïzî(î;èïÔîÐî9Æ ïƒî�}¸`m$hÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿChangingEntriesontheWindowCommandMenusThefollowingfunctionsprovideafunctionalinterfacetotheinteractivewindowoperationssothatuserprogramscancallthemdirectly.[Function]Ifis,itcalls.Ifisashrunkenwindow,itbringsupthe``iconwindow''menu.Ifisaunshrunkenwindow,itbringsupthewindowmenu.Theinitialitemsinthesemenusaredescribedabove.Iftheuserselectsoneoftheitemsfromtheprovidedmenu,thatitemisedto.Ifisnotaor,itreturns.[Function]Bringsupthebackgroundmenu.Theinitialitemsinthismenuaredescribedabove.Iftheuserselectsoneoftheitemsfromthemenu,thatitemised.19.12.3ChangingEntriesontheWindowCommandMenusThewindowcommandmenusforunshrunkenwindows,shrunkenwindows,andthebackgroundarecachedinthevariables,,and.Tochangetheentriesinthesemenus,theusershouldchangethechangethemenu``commandlists''inthevariables,,and,andsettheappropriatemenuvariabletoanon-,sothemenuwillberecreated.Thisprovidesawayofaddingcommandstothemenu,ofchangingitsfontorofrestoringthemenuifitgetsclobbered.The``commandlists''areintheformatoftheeldofamenu(seepage19.39),exceptasspeciedbelow.Note:commandmenusarerecreatedusingthecurrentvalueof.[Variable][Variable]Themenuthatisbroughtupinresponsetoarightbuttoninanunshrunkenwindowisstoredonthevariable.Ifissettoanon-,themenuwillberecreatedfromthelistofcommands.Theofeachcommandaddedtoshouldbeafunctionnamethatwillbeedtothewindow.[Variable][Variable]Themenuthatisbroughtupinresponsetoarightbuttoninashrunkenwindowisstoredonthevariable.Ifitis,itisrecreatedfromthelistofcommands.Theofeachcommandaddedafunctionnamethatwillbeedtothewindow.[Variable][Variable]Themenuthatisbroughtupinresponsetoarightbuttoninthebackgroundisstoredonthevariable.Ifitis,itisrecreatedfromthelistofcommands.Theofeachcommandaddedtoshouldbeaformthatwillbeed.19.22(DOWINDOWCOM)NILDOBACKGROUNDCOMAPPLYWINDOWNIL(DOBACKGROUNDCOM)EVALWindowMenuIconWindowMenuBackgroundMenuWindowMenuCommandsIconWindowMenuCommandsBackgroundMenuCommandsMENUITEMSMENUFONTWindowMenuWindowMenuCommandsWindowMenuWindowMenuMENUWindowMenuCommandsCADRWindowMenuCommandsAPPLYIconWindowMenuIconWindowMenuCommandsIconWindowMenuNILIconWindowMenuCommandsCADRAPPLYBackgroundMenuBackgroundMenuCommandsBackgroundMenuNILBackgroundMenuCommandsCADRBackgroundMenuCommandsEVALWINDOWWINDOWWINDOWWINDOWWINDOWWINDOW|ïb'î,î Cî$ûî&ôî)Pî.¡î5xï\:î ìî Ïîêîñîî< î%Æî+uî-0î/› î6Rî;† îB<îD îFæïZ”î ìîùî‚î î‘ïW�îC5 ïUéî¦îÏî"¥î#fî$¡î4-î4îî<î=gî>vîD^ïTDî¦îîjî�î"î%ñî+êî0²î8Tî9áî;, îBÞîHˆïRžî¦îÂîÅî î%-î)‰î,Qî0+î3Ãî5bî8Úî=-î?qîEˆïPøî¦îîsîaî"™î%9î&èî)=î,Úî05î2Šî8Nî<|î??îBYîGîïORî¦î¬î‡î&åî(Pî*Âî1yî5Áî6�î7òïLMîC5 ïJ§î¦î î`î ì î( î-�î0“î4«î8€î:\î=+îA7îC¸ïIî¦î'î¨î î"üî'<î)åî+�î-úî1 î5î7aî;–î>bîA„îFK|ïD�î ìîiî�î9î1îŽî#ßî*Oxï@8î ìî ôîNîÜîpîß î'¡î-ãî4î:\î=Dî?Ô îGŒï>“î ìîºî¦îCî!Ÿî.Žî/¹î>qî@8îBœîG€ï<íî ìîsî:îÛî¶î.î?î"Òî'‘î* î.Èî1@î58î<^î?èîA¯îD(ï;Gî î,Lî-îB%îBêîE‚îG€ï9¡î ì îAîîKîõîî#7î$î%Ïî(*î,î.«î0— î7î:î?¢î@ÈîC›îEOï7üî ìî¹îUî¡îÈînî 4î!üî$Öî&‡î(-î-Òî0î3êî58î6|î95 î@îBÒï6Vî ìî [î¬îXî¶î-îäî ùî$î%Èî&ðî*Îî-˜î0Ûî5Fî9’î;?î@àï3Qî ìî Øî3î”îæî Óî$zî&×î+œî/Bî7³ï0KîC™ ï.¦îC™ ï-î¦îWîî ·î!ýî' î(÷î*î/úî1‚î2‡î5±î9úî;‚î=L îD¶ï+Zî¦îîîî!nî.ýî0î:[î;¼î=Îî?rî@‘îF­îG€ï)´î¦î‰î8î -î& î)Šî+íî..î/ëîEïîGï(î—î^î œî'î+8î<¨îA0îC/îDhï&iî¦îbî.î ×î&ùî(èî*•î,óï#dîC™ ï!¾îC™ ï î¦îhî2î éî"@î'_î)\î*ôî0€î2î3.î6iî:Ãî<[î=pîC`îHsïrî¦î»î´î î0ñî1ôî3jî4´î8™î9jî:´î<îAöîEOîG¡ïÍî¦î^î2ºî3Ãî:zî<2î?aîE½ï'î¦îÏîDî"î$Ìî'tî-—î/†î13î3�ï"îC™ ï|îC™ ïÖî¦î�î‚î!bî"áî()î*Nî,î1Ãî3„î4Âî8%î<§î>hî@Ú îHsï0î¦î»î´î î0ñî1ôî3jî4´î8™î9jî:´î<îAöîEOîG¡ï‹î¦î^î2ºî3Ãî:zî<2î?aîE½ïåî¦î,Sî0Ëî2ºî3âî7Fî:î<ºîBïî("}Ä`m$|xïW�î ì î1ïUéî î'“ïPøîC»ïORî+ëî3<ïLMî ìïIîBïï>“î8 î"Ë î2® ï;Gî ìîÐî/©ï9¡îÚï6VîAï3Qî0úï0Kî ì ï.¦î ìï+Zî&– î1y îCQï)´î6Ðï(î¦î,õï&iî"Æï#dî ì ï!¾î ìïrî%. î6ïÍî >î6™ï'î)cï"î ì ï|î ìï0î%. î6ï‹î >î6™ïåîSî>©"ÿ}ÄØ`m$ŠxïW�îØîïUéî î;î6Tî:ƒïTDî2Uî6ƒïORîSî‚î!î%6ÿÿÿ}œ$`m$,ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIES19.12.4CoordinateSystemsOnewayofthinkingofawindowisasa``view''ontoanobject(e.g.agraph,ale,apicture,etc.)Theobjecthasitsownnaturalcoordinatesystemintermsofwhichitssubpartsarelaidout.Whenthewindowiscreated,theXOsetandYOsetofthewindow'sdisplaystreamaresettomaptheoriginoftheobject'scoordinatesystemintothelowerleftpointofthewindow'sinteriorregion.Atthesametime,theClippingRegionofthedisplaystreamissettocorrespondtotheinteriorofthewindow.Fromthenon,thedisplaystream'scoordinatesystemistranslatedanditsclippingregionadjustedwheneverthewindowismoved,scrolledorreshaped.Thereareseveraldistinctregionsassociatedwithawindowviewinganobject.First,thereisaregioninthewindow'scoordinatesystemthatcontainsthecompleteimageoftheobject.Thisregion(whichcanonlybedeterminedbyapplicationprogramswithknowledgeofthe``semantics''oftheobject)isstoredasthepropertyofthewindow(page19.32).Second,theclippingregionofthewindow(obtainablewiththefunction)speciestheportionoftheobjectthatisactuallyvisibleinthewindow.Thisissetsothatitcorrespondstotheinteriorofthewindow(notincludingtheborderortitle).Finally,thereistheregiononthescreenthatspeciesthetotalareathatthewindowoccupies,includingtheborderandtitle.Thisregion(inscreencoordinates)isstoredasthepropertyofthewindow(page19.33).19.12.5ScrollingThewindowsystemsupportstheideaofscrollingthecontentsofawindow.Scrollingregionsareontheleftandthebottomedgeofeachwindow.Thescrollingregionswillonlybeactiveifthewindowhasawindowproperty(page19.31).Ifawindowhasaandthecursormovesfrominsidethatwindowintoitsscrollingregionandremainsthereformilliseconds(initially1000),ascrollbarappears.Thevalueoftheglobalvariable(initially24)determinesthesizeofthescrollingregion.Thekeyisusedtoindicateupwardorleftwardscrollingbytheamountnecessarytomovetheselectedpositiontothetoportheleftedge.Thekeyisusedtoindicatedownwardorrightwardscrollingbytheamountnecessarytomovethetoporleftedgetotheselectedposition.Thekeyisusedtoindicateglobalplacementoftheobjectwithinthewindow(similarto``thumbing''abook).Inthescrollregion,thepartoftheobjectthatisbeingviewedbythewindowismarkedwithagrayshade.Ifthewholescrollbaristhoughtofastheentireobject,theshadedportionistheportioncurrentlybeingviewed.Thiswillonlyoccurwhenthewindow``knows''howbigtheobjectis(seewindowproperty,page19.32).Whenthebuttonisreleasedinascrollregion,thefunctioniscalled.callsthescrollingfunctionassociatedwiththewindowtodotheactualscrollingandprovidesaprogrammableentrytothescrollingoperation.[Function]Callsthewindowpropertyofthewindowwithargu-ments,,and.Seewindowproperty,page19.31.Thefunctionthattracksthemousewhileitisinthescrollregionis.19.23EXTENTDSPCLIPPINGREGIONREGIONSCROLLFNSCROLLFNSCROLLWAITTIMESCROLLBARWIDTHLEFTRIGHTMIDDLEEXTENTSCROLLWSCROLLW(SCROLLW)SCROLLFNSCROLLFNSCROLL.HANDLERWINDOWDELTAXDELTAYCONTINUOUSFLGWINDOWWINDOWDELTAXDELTAYCONTINUOUSFLG|ïb'îŒ î%”î'*î-Ñ ï\:î ìîi îsxïWÕî ìî î îåî}îXî¤îïî!}î#Nî$šî)Uî,§î.¹î2òî6‰î7ÖîVî@&îC`îEàïRäî ìî ²îî îìîrî!Vî#Ãî'™î*î-Åî/Œî1øî8 î<þîAîîC÷îFcïQ>î ìî jîÊ î¸îrîÒî"ƒî&òî(`î*~î,- î3Fî4öî7Vî<>î=øî@YîF ïO™î ìî *î¨î îéîL î#%î'·î)< î/�î2mî4`î9Äî>îC®ïMóî ìî IîpîÛîµîÆîˆïJîî ìî ðîHîÛî²î| î$èî(î)6î.cî3zî5oî:î=¾îAJîB»îCêîH0ïIHî ìî Vîe î0î´î Œî%øî(bî.Qî2gî4+î6•î;Tî>xîBÄîGTïG¢î ìî õîÖ î î÷ îôî$ôî'þî.Îî0xî2È î:Iî;òî>BîBÂîDîH0ïEüî ìîÃîNîûîNî jî$î(¯î-Îî0!î5_î9”î;Bî=”îB± ïDWî ìî ùîLî"ÿî#òî)Fî+™î0iî2î4iî8tî;5î<–îA�îEÝîG€ïB±î ìî�î—îñîüî®îjî¯ î#8î$Õî'"î+÷î-žî/ëî5î7Ýî=Ûî@)îD�îFBïA î ìîïîtîÝî9îvîyîÕî# î%Óî+0î-Œî0­î3¢î6lî8Èî=íîCÏï?eî ìî Eî¸îhîµîÈîî $î$U î, î-rî1�î36î;î@ªîB]îD¶ï=Àî ìî ¨|ï9[î ìîixï4öî ìî áî(î¿îjîçî!ýî#Õî)sî+ðî1zî3Qî4šî:£î@„îEgîGÙï3Qî ìî aîìî¹î/î îhî7î!~î'pî*^î/õî4Ðî7’î:Áî<Èî@ÉîBAîD¶ï1«î ìî yîîWî î#Þî(Æî*aî+¥î0çî3uî<î>àîAXîE�ï0î ìî Zîcî9îjîJî-î#¶î(î*¿î/ðî3�îB ï._î ì îyî­îðî°î=î!î$î'Åî)–î, î0FîAó îG�ï,ºî ì îßî1îÍîyîÊî<î#úî*˜î-î.}î1ªî3Kî8gî=Vî? îD_ï+î ìî þîsî’î·î|îPî!Æî'î,[î. î0•î3 î4ûî7pî9ûî> îEÇîHsï)nî ìî .îãîîÐîœî"ßî(fî*iî,Ïî1ßî7õî9«î=pî?ÖîBRîDîF™ï'Èî ìî §îîJî6î!·î$Yî%Òî)î*Õî0 î49î:Ûî<¡î? îC0îG€ï&#î ìîî îº î_îˆï#î ìî ÖîQîîÐîKîIîî ˜î$Ëî'´î);î- î1àî3÷î6rî;¶î=>îBVîE‹îFÑï!xî ìîFî³îýîòî…îäî;î"Eî#éî%‚î'Ëî+ î/ýî2Gî6Øî;žî<õî??îDïÒî ìî ¡îÁîÆî]îbî î"­î$øî* î/šî2‰î4Ôî7î;"î îA=îC*ïXïî¦ î[î&î)Wî+ïî/Xî0§î4rî8×î;8î=üîCãîG€ïWIî¦îÄî-î#¦î%_î+#î.‰î/Õî2uî4ê î:Äî;äî?€îC·îEïU£î¦îdî'úî+Çî-/î0Eî3±îB ïSýî¦î_îÃî$î"Sî#Áî&dî*fî,Çî0qî5î6gî:^î;‹î@¶îCîEÄîG€ïRXî¦îLîŒî"@î'hî)Åî-ïî/œî4Äî7!î<Ÿî> îB4ïORî¦îîŽî‰î"Qî$î)¹î,lî.Pî0ëî5î6Þî<žî> î?Éî@òîDîFÐïM­î¦î¹îÛî’î"åî'uî*²î.[î0yî6óî:éî=¡î?œîBjîD/îG¢ïLî)2î+ î1–î3#î5î7«î9¦îeî@ îE’îFýïGî(Ìî*º î6ÿî8>î<î>ñïEpî¦îÏîEîËîæî$ïBkî¦î î!lî%ñî.Lî3Vî5~î8îÂîBúîHFï?î¦î$îfîäî$rî';î,£î.pî0íî3�î5Xî7Öî=îB=îCÈîEßîG€ï=yîwî þî"‚î&2î(©î-oî/@î1ùî7|î9îîC”îFÅï%–î¦îœî!"î#wî)r î0¬î3Yî6uî9yî;Ïï#ðî¦îèîƒî ¾î&Dî+Àî/xî2Uî8î:îî>ÑîA­îGï"Jî¦îzîî!î(-î0Mî3 î;_îAUîErï ¥î&¬î)Žî- î2Áî4§î8/î:Åî?îC—îHïÿî¦îÛî î#dî%Kî&¾î)„î,î/Øî2Sî7˜î9xîÜîAmîCBîE½ïYî¦îî.î–î"î#Õî&<î+Èî./î2þî4Àî7(î;Rî<Æî@`îCŽîFAï³î¦î±îî ™î"]î$Æî*Tî,½î/<î1î3iî7•î9 î:Åî=.î@‰îBMîD¶ïî¦îkîØî 6î!þî$kî(šî*î+Ñî.>î0Áî2ˆî4õî:ÎîCRîDÌïhî¦îSîòîðî"Mî'tî)!î.'î/Oî2$î3Ü î9‡î;äîANîCîD.ïcî¦îî&„î(<î.½î>ÿîAõîG€ï½î¦îûîëî!äî#êî&‹î({î+î.Œî1cî3 î:Uî<î? îFîHïî±î©îFî!Àî'î*Mî,Ýî0=î7SîG4ïqî¦î«ï lî¦î$nî%þî+Cî,Dî/ î4Úî7Ìî:Nî?òîD†îFï Çî¦îåî¤î!˜î$^î6Åî9•î=bî?æîEVîG4ï !î¦îãî!î#?î(Ôî4 î4èî8,ïî(ÿ}¸`m$ˆxï\:î ìî¶ïU£îÁ î5ß ïLî¦îCwïJaî ÖïH»î3sïGî¦î0ÆïEpî!“ïBkî'ÂîEýï=yî¦ï;ÔîÚï:.î;ï5ƒîÕî=>ï3Ýî¦ï/2î ìî=,ï*‡î ìî5²ï(áî+¾î3Žï%–îAÉï"Jî5oï ¥î¦ïî=´ïcî)²î/æïî¦î2Hî8Kï lî(¾ï Çî'Òï !î*Î !ÿÿÿ}¸\`m$~xï\:î]îŒïXïî î$0ïH»î– î'&ïGîA" îJ²ï@Åî2Eî3ï?î?òî@Áï=yî>§î?vîG[îH*ï;Ôî=î=êï:.î1Ãî2“ï8ˆî/Pî0 î7Ÿî8oï*‡îâîî î"iî#(î%·î(î(Ãî)‚î+: î4Êï"Jî*î.=ïcîtîÁî€î!î#^î$î$Ûï lîL î"Üÿ} t`m$~ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIES19.12.6ProgrammaticWindowOperations[Function]Createsanewwindow.indicateswhereandhowlargethewindowshouldbebyspecifyingtheexteriorregionofthewindow(theusableheightandwidthoftheresultingwindowwillbesmallerthantheheightandwidthoftheregionbytwicethebordersizeandfurtherlesstheheightofthetitle,ifany).Ifis,iscalledtoprompttheuserforaregion.Ifisnon-,itisprintedintheborderatthetopofthewindow.Theisprintedusingtheglobaldisplaystream.Thustheheightofthetitlewillbe.Ifisanumber,itisusedasthebordersize.Ifisnotanumber,thewindowwillhaveaborder(initially4)bitswide.Ifisnon-,thewindowwillnotbeopened,i.e.displayedonthescreen.[Function]Returnsifisawindow,otherwise.[Function]Returns,ifisanopenwindow(hasnotbeenclosed);otherwise.[Function]Returnsalistofallactivewindows.[Function]Returnsthewindowwhichcontainsthepositioninscreencoordinatesofifisa,theposition(,)ifandarenumbers,orthepositionofthecursorifis.Returnsifthecoordinatesarenotinanywindow.Iftheyareinmorethanonewindow,itreturnstheuppermost.Example:returnsthewindowthatthecursorisin.[Function]Ifisadisplaystream,itisreturned.Ifisawindow,itsdisplaystreamisreturned.Ifis,itevaluates(whichshouldbeanatom).Ifitsvalueisawindow,itisreopenedifitisclosed,andreturned.Ifitsvalueisnotawindow,issettoanewlycreatedwindow(promptinguserforregion)andreturned.Ifis,anewwindowiscreatedandreturned.Iforaregivenandawindowisinvolved,theorpropertyofthewindowisreset.The=caseismostusefulforprogramsthatwanttodisplaytheiroutputinawindow,butwanttoreusethesamewindoweachtimetheyarecalled.Thenon-casesaregoodfordecodingadisplaystreamargumentpassedtoafunction.[Function]Returnsthewidthofthewindownecessarytohavepointsinits19.25(CREATEW)NILGETREGIONNILWindowTitleDisplayStream(FONTPROPWindowTitleDisplayStream'HEIGHT)WBorderNIL(WINDOWP)NIL(OPENWP)NIL(OPENWINDOWS)(WHICHW)POSITIONNILNIL(WHICHW)(DECODE/WINDOW/OR/DISPLAYSTREAM)NILNEWTITLEBORDERNILNIL(WIDTHIFWINDOW)REGIONTITLEBORDERNOOPENFLGREGIONREGIONTITLETITLEBORDERBORDERNOOPENFLGXXXWINDOWWINDOWWINDOWXYXXXYXYXDSORWWINDOWVARTITLEBORDERDSORWDSORWDSORWWINDOWVARWINDOWVARDSORWTITLEBORDERDSORWINTERIORWIDTHBORDERINTERIORWIDTH|ïb'îŒ î%”î'*î-Ñ ï\:î ìîi îKîœ xïWÕîC5 ïV0î¦î~îšî yî+aî1î5î7¯î:¤î=ûî@KîEeïTŠî¦îªîº î"@î$²î)Øî.-î/úî2lî7¨î:”î>éîC5îEÿïRäî¦îTî§î!=î&Yî(øî*Ýî/–î2¯î5î9.î;Ùî?­îA[îC®îGãïQ>î¦î:î›î"î$Âî'zî,!î.¸î1î5Rî7 î9mî<”î=÷îA›îHsïO™î,î#î$…î(yî*&î/ î1iî4_î6›î7ÃïL“î¦îîQî#•î$Oî%‚î&Êî+xî-î/>î3“î5 î7Dî9•î;*î=fîCïJîî¦îîåî!�î#ìî( î,½îEUîFbïIHî¦îuîî!Dî$î'Nî*hïG¢î_ïD�î¦îÀî &î!Jî&Åî(î){î,¯î.Wî0¯î5"î8Lî?fî@ÌîC:îD^ïB÷î¦îî*î!Óî%î&?î1 î6�î8<î:Ûï?òî¦î!Vî"Èî( î(ïî+Sî0€î30î5ªî7Ÿî<Úî?TîEtîG€ï>Lî¦ï;GîC5 ï9¡î¦î5î ðî"[î#ƒî, ï6œîC5 ï4öî¦î"kî#î+.î,Ñî.øî2 î8î;$î=ÐîAbï3Qî¦ ï0KîC5 ï.¦î¦îÙîî >î!õî#ãî'Ìï+ îC5 ï)ûî¦î÷îsî$¸î(áî.]î0Ùî65î7ÿîî@îEÂîG€ï&¯î¦îÑî�î"}î#Xî+”î,ôî/R î6”î8æî;Yî=î?¤îEOîFÐï% î¦îøî¤î4î"Wî%î*î+Ôî0ƒî2à ï"î¦î%î)Àî,î1Dî4î6mî:—î<ïÿîC5 ïYî¦î8îÁî!î%Õî*¿î,3î-¼î41î:ÂîÙîCiîGîïî¦îˆîûîoî!;î$Õî&3î'Oî,Äî. î/jî5aî6´î7ýî9[î=Óî@{îF�îHïhî¦îRîÁî9î gî.=î/­î1Íî3î4­î8°î=zîB¦ ïÂî¦îÁî î!üî$Õî+Zî1öî6 î7 î8Wî;fî@±îB?îG(ïî¦î¾î#_î*¿î-î0¼î3oî4•î9¹î;!îA îHïwîMî"ûî$Êî'@î,î.î2î9Oî=Ðî@ÔîBWîEÈïÑî¦îàîìî"¶î&î'ºî,fî/©î4î5Àî6èîâîB:îCæîG€ï+î¦îî 3î#Wî&pî)sî+ºî0-î2ùî8·î<î>dîAÉîCûï…î¦îÏî}î!éî(î,oî.î/Eï €îC5 ï Úî¦îãîIî#1î$òî'Yî,‰î2 î4WîB%îFNîHïî(ÿ}„`m$^xïWÕî ìî)FïO™î¦îïL“î!ïJîî1+ïIHî,Èî5/ïG¢î¦ïB÷î*·ï?òî%‡ï;Gî ìîSï9¡î)ï6œî ìîþï4öîFÔï0Kî ì ï+ î ìî4ï(UîFï&¯î÷î(‹ï"îÕïÿî ìîîCïL“îîE¸ïD�î"î9Èï?òî.îãï;Gî{ï9¡îÙî”ï6œî¤îÓï4öîî!@î%î)Fï+ î¤î\ï)ûîE‰îH�ï(Uî*î+0î.qî2Žï&¯î1ïÿî$Ïî'ôî)þî.-î0î2¦î7'ïYîEîjî5Ðî8õï³î%gî(Œî6€î:®î<‡ïhî%ìî*î+ôïÂî,ÿî0$ïî<î%ïwî4ÿî8$ï €î†îdî!Zï Úî7¤î=‚!ÿ}pÔ`m$ªÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿProgrammaticWindowOperationsinteriorifthewidthoftheborderis.Ifis,thedefaultbordersizeisused.[Function]Returnstheheightofthewindownecessarytohavepointsinitsinteriorwithaborderofand,ifisnon-,atitle.Ifis,thedefaultbordersizeisused.andareusefulforcalculatingthewidthandheightforacalltoforthepurposeofpositioningawindow.Interlisp-Dprovidesasetofoperationswhichapplytoanywindow.Inadditiontobeingavailableasfunctions,mostofthesearealsoavailableviathestandardmouseinterface.Seepage19.20[Function]Bringstothetopofthestackofoverlappingwindows,guaranteeingthatitisentirelyvisible.Ifisclosed,itisopened.Thisisdoneautomaticallywheneveraprintingordrawingoperationoccurstothewindow.Ifis,theofiscalled(page19.30).Ifis,itisnotcalled,whichallowsatocallwithoutcausinganinniteloop.[Function]Reshapestotheregion,orpromptsforaregion(with,page19.37)ifnoneissupplied.Callsthewindow's,ifany(page19.31).[Function]callsthefunctionorfunctionsonthewindowpropertyof,ifany(page19.30).Ifoneofthesistheatomorreturnstheatomasavalue,returnswithoutdoinganythingfurther.Otherwise,removesfromthewindowstackandrestoresthebitsitisobscuring.Ifwasclosed,isreturnedasthevalue.Ifitwasnotclosed,(forexamplebecauseitsreturnedtheatom),isreturnedasthevalue.canberestoredinthesameplacewiththesamecontents(reopened)bycallingorbyusingitasthesourceofadisplayoperation.[Function]Ifisaclosedwindow,callsthefunctionorfunctionsonthewindowpropertyof,ifany(page19.30).Ifoneofthesistheatom,thewindowwillnotbeopened.Otherwisethewindowisplacedontheocclusionstackofwindowsanditscontentsdisplayedonthescreen.Ifisanopenwindow,itreturns.[Function]Movestothepositionspeciedbyandaccordingtothefollowingrules:Ifis,(page19.36)iscalledtoreadapositionfrom19.26NILWBorder(HEIGHTIFWINDOW)NILNILWBorderWIDTHIFWINDOWHEIGHTIFWINDOWGETBOXPOSITION(TOTOPW)NILTOTOPFNTTOTOPFNTOTOPW(SHAPEW)GETREGIONRESHAPEFN(CLOSEW)CLOSEWCLOSEFNCLOSEFNDON'TDON'TCLOSEWCLOSEWCLOSEFNDON'TNILOPENW(OPENW)OPENWOPENFNOPENFNDON'TNIL(MOVEW)NILGETBOXPOSITIONBORDERBORDERINTERIORHEIGHTTITLEFLGBORDERINTERIORHEIGHTBORDERTITLEFLGBORDERWINDOWNOCALLTOPWFNWINDOWWINDOWNOCALLTOPWFNWINDOWNOCALLTOPWFNWINDOWNEWREGIONWINDOWNEWREGIONWINDOWWINDOWWINDOWWINDOWWINDOWWINDOWWINDOWWINDOWWINDOWWINDOWWINDOWPOSorXYWINDOWPOSorXYPOSorX|ïb'îF î('î-y xï\8î¦î¿îRî ãî$õî&áî)rî.î4Úî5éî=uîA˜îB¨îE9ïZ’î¦îî%,î&—ïW�îC5 ïUçî¦îÍîî#Gî$óî'Dî,^î2_î4îBQîFdîHïTAî¦îyî€î —î$ýî,5î/3î7î8]î=¡î>kî?ƒîBËïRœî¦î–îrîÏî#sî'ëî0ùî2dïO–îtî$ î' î+6î-‰ î4uî6ëî:áî=®îAüîDOîE�îH0ïMñî3înîÌî î!Á î(Öî)ÿïJìî ì îUîî·îúî0î î"Åî&êî*Íî,•î/Nî5Iî71î<¶î>~îB`îH0ïIFî ì î<î•îMîÓî$îîî#£î%Þî(<î-Ñî2' î8Kî:ßî>"ïFAîC5 ïD›î¦î!Êî#tî%Ïî(@î)öî,Qî/¿î1t î8õî>ö îGïBõî¦îúîbî\î$)î+ƒî,ìî1mî2Àî4)î9†î<œî>îAr ïAOî¦îÕîþî$;î%ýî+Eî1iî5ªî7Vî9´ï>Jî¦î$:î(Eî)=î28î:î;‹î?šîCrîH\ï<¤î"™î$òî%æî'Sî(Õî+_î/Éî3ëî8,î?êîA®ï:ÿî¦î­î!“î#‚î(0ï7ùîC5 ï6Tî¦î$#î&î(¿î4íî6î8î=Ïî@SîAÄîFLï4®î6î î#lî'Šî(õî,pî-æî4î7�î9ùîG–îH}ï3î¦îEîï0îC5 ï.]îwî Åî#dî)î+î1Yî3Ÿî6>î;§îH&ï,·îÿîî”î"`î&Iî+fî-î/éî1Íî:9î;nî=î?�îHï+î¦î¡îKî(î* î+‚î5ºî:µî@îD2ï)lî¦îÇ î)î4(î7yî9Äî>ØîB5îD×ï'Æî¦îî«îîs î&Hî-®î0\î:Åî<3îAÍîC~îEàï& î¦îî_îúî_î#Öî&|î+áî0ðî9î>šî@éîHˆï${î°îî!°î#]î%ºï!uîˆî î" î'Vî)î+iî.èî2~î5šî7üî;{î@é îGãïÐî¦î ¾î"�î${î(!î)vî+"î-€î1Ëî3‚î4«î9Y ïÊîC5 ï%î¦îuî!î"xî&Ûî1�î4Õî7jî=î?îECîG€ïî¦îÀî'Êî.Íî/œî0îî3€î7/î;Áî=4î?ÐîA{îHÕïÙî¦î<îÅî#Ÿî$¦î'/î,‚î/Vî1ôî4î9ðî@—îC îHsï3î¦î÷îôî Kî&Hî)±î+bî1î3´î5†î:éî@üîBúîEPïŽî¦îî oî"]î%Íî+Kî, î3ÔïˆîC5 ïãî¦î!žî#"î%Vî*kî/ãî6Gî:î@îAœîCÐï=î¦ï 8î¦îÁî!¡î.£î2Oî6Rî7¬î;�î=,î@4îALîFyïî( }œ`m$Rxï\8î?ïZ’îÇïW�î ìî.îïTAî;ïRœîî*”ïO–î ì îA ïMñî ì ïFAî ìî!5ï>Jî%Àî+¶ï<¤î$î9lîDOï7ùî ìî„ï4®î¦î@ï0î ìîþï.]î¦îA~ï,·î4XîC6ï+î#î/àï)lî#Œï& î2»îDUï${î¦ïÐîïÊî ìî'ï%î, ïî"HîCËïÙîkïŽî1Oïˆî ìîõï 8îî"l ÿÿ}œ`m$�xï\8î/»î7žïW�î] î"ßî(î)ÏïUçî77 ïTAî&£î0�î5©îD:ïFAî¤îÓîÞîÓïD›îïî ïBõî%¨î)Öï>JîCî8î4 î8:ï<¤î¦îœï7ùî¤îÓîÞï6Tîýî",î-Gï0î¤îÓï,·î¦îÕï)lî.]î2Œï'Æî'Íî+ûî4ãî9ï!uî¦îÕïÊîÍîüï%î_îŽïî)tî-£ïŽî'îUïˆîÍîüîîïãîéî î1´î8Óï 8îÿÿ}¤`m$¨ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIEStheuser.Ifisa,isused.Ifandareboth,apositioniscreatedusingastheandasthe.Ifisa,apositioniscreatedusingitsastheandasthe.Ifisnotopenandisnon-,thewindowwillbemovedwithoutbeingopened.Otherwise,itwillbeopened.Ifhastheatomasaproperty(page19.32),thewindowwillnotbemoved.Ifhasanyothernon-valueasaproperty,itshouldbeafunctionorlistoffunctionsthatwillbecalledbeforethewindowismovedwiththeasanargument.Ifitreturnstheatom,thewindowwillnotbemoved.Ifitreturnsaposition,thewindowwillbemovedtothatpositioninsteadoftheonespeciedbyand.Iftherearemorethanones,thelastonetoreturnavalueistheonethatdetermineswherethewindowismovedto.Ifismovedandhasawindowpropertyof(page19.32),itshouldbeafunctionoralistoffunctionsthatwillbecalledafterthewindowismovedwithasanargument.returnsthenewposition,orifthewindowcouldnotbemoved.[Function]Likeformovingwindowsbutisinterpretedrelativetothecurrentpositionof.Example:Thefollowingcodemovestotherightonescreenpoint.[Function]Fillswithitsbackgroundtexture,changesitscoordinatesystemsothattheoriginisthelowerleftcornerofthewindow,setsitsXpositiontotheleftmarginandsetsitsYpositiontothebaselineoftheuppermostlineoftext,ie.thetopofthewindowlessthefontascent.[Function]Putsonthebottomofthestackbymovingallthewindowsthatitcoversinfrontofit.[Function]Redisplaytheregionofthewindow.Ifis,theentirewindowisredisplayed.Ifis,anddoesn'thavea(page19.32),willnotchangeandthemessage``Thatwindowdoesn'thaveaREPAINTFN''willbeprintedinthepromptwindow.[Function]makesasmalliconwhichrepresentsandremoves19.27POSITIONNUMBERPXCOORDYCOORDREGIONLEFTXCOORDBOTTOMYCOORDNILDON'TMOVEFNNILMOVEFNDON'TMOVEFNAFTERMOVEFNMOVEWNIL(RELMOVEW)MOVEW(RELMOVEW(createPOSITIONXCOORD_1YCOORD_0))(CLEARW)(BURYW)(REDISPLAYW)NILNILREPAINTFN(SHRINKW)SHRINKWPOSorXPOSorXPOSorXYPOSorXYPOSorXWINDOWPOSorXWINDOWWINDOWWINDOWPOSorXYWINDOWWINDOWWINDOWWINDOWPOSITIONPOSITIONWINDOWWINDOWWINDOWWINDOWWINDOWWINDOWWINDOWWINDOWREGIONALWAYSFLGREGIONWINDOWREGIONALWAYSFLGWINDOWWINDOWWINDOWTOWHATICONPOSITIONEXPANDFNWINDOWWINDOW|ïb'îŒ î%”î'*î-Ñ xï\8î¦îïY3î¦îâîLî'.î,Äî./ïV-î¦îBî"³î%4î.€î/Œî0äî6Rî7ìî<âîE£îG€ïTˆî5î!Eî"òî*ZïQƒî¦î îŒî%Õî&Æî(î-Vî.Öî3°î7lî=Pî?îG(ïOÝî5îáî&IïLØî¦îÝî 4î"“î%îî-7î.�î3Òî4šî6äî;÷î>Œî@hîDÖïK2î¦înî Ì î'Ÿî(ôî+�î-ŒïH-î¦î î!‚î#ãî,î-Íî4Œî:%î=æîBUîD¶ïF‡î¦î0îƒîSî#Mî*lî,¿î/>î2ºî8cî;êî=wîCðïDáî¦î î–î—î Ñî&Xî(,î*yî,Bî2Mî5*î7äî9åî=êîBGîD¶ïC;î¦î0îÐî!î)î+Jî-Xî4\î5ûî7oî<<î>¸îF…îG€ïA–î¦îÔîƒî!ýî#òî) î*“î+ïî0¤î1Ôî7qî9Õî?îA²îC§îH0ï?ðî¦îqî®î$\î&î(pî+î0¹î7mî:ùî;Ôî=Tî@ÚîC*îFºï>Jî¦î_î Åî#'î%©î(Wî* î.9î/fî3î4�î6ãî9‘îî@îD-îG€ï6Tî¦îÍî8î"ºî+¯î-[î/Jï3Nî^î! î#iî&Tî+éî0µî2î4qî9˜î=`î?ÓîAÁï0IîC5 ï.£î¦îNî!kî&<î+Éî4Tî5¡ î<ŽîAJîBÙîEï,þî¦îþî$*î% î+„î.uî4œî7ûîBNîDîFŽï+Xî¦îPî…ï%NîC5 ï#¨î¦î Êî#úî%ë î-‡î2¡î7áî9Ò î@¨îE7îGï"î¦î'îHîÖî"Vî&@î(Öî-Eî/ î1¡î7Kî: î< î=¹îCîDêîGjï \î¦îkî7î!íî#Ýî%€î*Ôî,˜î/ î2;î5î6Öî9Jî@6îCîDÐîGúï·î¦îîwî.î Œî%²î(Fî*£î-�ï±îC5 ï î¦î }î"wî$Ëî)†î+3î-‡î0íî2Ýî7Âî9§î;úîA›îD]îE¨ïfî¦îSîÃîzïaîC5 ï»î¦î7î Êî*Åî,³î/Fî9ûî; îBIîFnîG€ïî¦î”î Áî"1 î*î38î7-î8î@¬îEkîH´ïoîŸî#Aî-Yî/çî2@î6Éî9cî;¥î@ÝîD¶ïÊî¦î`î£î Ì î*Zî-î.òî3Âî5nî7Ëî<±ï ÄîC5 ï î2î"Œî#Ûî'›î*Âî.ò î;—î>rïî(!ÿÿ}ø`m$2xïY3î uïV-î(žïTˆî¦î%PïQƒî Êî9ZîA„ïOÝî¦î!?ïLØî1MïH-î'bî.úïF‡î5zî>�ïC;îBRï>JîTï9Ÿîøïoî'—î+Åï Äî{îªîµîmî.îæ î'—î)äï î5”î9ÃîDîH. ÿÿÿ}Ø`m$ÊÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿWindowPropertiesfromthescreen.Iconshaveadierentwindowcommandmenuthatcontains``''insteadof``''.Thecommandcallswhichreturnstheshrunkenwindowtoitsoriginalsizeandplace.Theproperty(page19.30)ofthewindowaectstheoperationof.Ifthepropertyofistheatom,prints``Can'tshrinkthatwindow''intheandreturns.Otherwise,thepropertyofthewindowistreatedasa(listof)function(s)toapplyto;ifanyreturnstheatom,prints``Can'tshrinkthatwindow''intheandreturns.,ifgiven,indicatestheimagetheiconwindowwillhave.Ifisastring,atomorlist,theicon'simagewillbethatstring(currentlyimplementedasatitle-onlywindowwithasthetitle.)Ifisa,theicon'simagewillbeacopyofthebitmap.Ifisa,thatwindowwillbeusedastheicon.Ifisnotgiven(asisthecasewheninvokedfromthewindowcommand),thenthefollowingapplyinturn:(1)Ifthewindowhasanproperty(page19.31),itgetscalledwitharguments,whereisthewindowbeingshrunkandisthepreviouslycreatedicon,ifany.Theshouldreturnoneoftheentitiesdescribedaboveorreturntheifitdoesnotwanttochangeit.(2)Ifthewindowhasanproperty(page19.31),itisusedasthevalueof.(3)Ifthewindowhasneitheranorproperty,theiconwillbe'stitleor,ifdoesn'thaveatitle,thedateandtimeoftheiconcreation.givesthepositionthatthenewiconwillbeonthescreen.Ifitis,theiconwillbeinthecornerofthewindowfurthestfromthecenterofthescreen.Inallcasestheiconiscachedontheproperty(page19.31)ofsorepeatingreusesthesameicon(unlessoverriddenbythedescribedabove).Thustochangetheiconitisnecessarytoremovethepropertyorcallexplicitlygivingaargument.[Function]Restoresthewindowforwhichisanicon,andremovestheiconfromthescreen.Ifthe(page19.31)windowpropertyofthemainwindowistheatom,thewindowwon'tbeexpanded.Otherwise,thewindowwillberestoredtoitsoriginalsizeandlocationandthe(orlistoffunctions)willbeappliedtoit.19.12.7WindowPropertiesThebehaviorofawindowiscontrolledbyasetofwindowproperties.Someoftheseareusedbythesystem.However,anyarbitrarypropertynamemaybeusedbyauserprogramtoassociateinformationwithawindow.Formanyapplicationstheuserwillassociatethestructurebeingdisplayedwithitswindowusingaproperty.Thefollowingfunctionsprovideforreadingandsettingwindowproperties:19.28EXPANDSHRINKEXPANDEXPANDWSHRINKFNSHRINKWSHRINKFNDON'TSHRINKWPROMPTWINDOWSHRINKFNDON'TSHRINKWPROMPTWINDOWBITMAPWINDOWSHRINKICONFN()ICONFNICONICONFNICONNILICONWINDOWSHRINKWICONFNICONWINDOWSHRINKW(EXPANDW)EXPANDFNDON'TEXPANDFNWINDOWWINDOWWINDOWTOWHATTOWHATTOWHATTOWHATTOWHATTOWHATWINDOWOLDICONWINDOWOLDICONTOWHATOLDICONTOWHATWINDOWWINDOWICONPOSITIONWINDOWTOWHATICONICON|ïb'î#óî)E xï\8î¦î=îÍî#î&øî*oî+Ëî1ˆî6âî=pîA€îDïZ’î¦îaî°î#{î%Oî+ î-î5±î<)îEÓïXìî¦îUî²î$µî)Üî+‰î-bî2gî5î7ÄïUçî¦î!‡î'î*¨î.¢î0@î2…î=XîAuîC¹ïTAî¦î%îæî!Mî*³î0.î7Žî8ßî;"îB¶ïRœî¦î‡îáî$î&Òî,¡î.Fî;-î=ÚîC ïPöî¦î!.î&ºî(iî*½î/Ûî1<î5Ìî7pî8�î;;î<œî=� îDqîFïOPî¦îÀîÑî!Eî#÷î(ºî++î2íî:Vî>SîBÈîGïMªî¦î}î)î, î.ÕïJ¥î÷îáîOî#jî)$î+�î/§î2î5"î:Wî=îAîHsïHÿî¦îâî$î ±î"‡î%2î'¢î+’î/®î2jî4lî7Jî;0 îA“ ïGZî¦îjî«îkî ™î%Øî.ôî0¸î3-î7;î>¿î@AîFŒîG€ïE´î¦î‡î“î"?î$1î%]î(°î*jî,Ëî2î9dî:ÑîAîAçîD¶ïDî¦îOî>îwî!$î#‚ïA î¦î#î ¢î#(î&íî)&î*¥î-î0î3Ûî9+î<£îD¶ï?cî¦îóî"0î$¨î*Îî.°î0wî4&î6fî8î:xî?¹îBFï=¾î¦îCî!î%{î&×î)©î-¤î0ÃîDäîEÉï<î~îãî!:î&[î*î.°î7qî8Öî;- îAÄîF„ï:rî¦îîƒî%î)£î-åî0¥î2sî:Óî?£îEßï8Ìî¦îoîŸî& î'†î(áî,î.�î1ìî3Ÿî8Iî:3î<_î=åî@IîEvîGîï7&î…î!î$Óî)<î*�î+øî//î0Ùî35î6Ùî=ßî>¹î@ÜîB[îD¶ï5�î¦î,îîî&‘î,Zî2_î4Ïî7äî: îAûîCmîFKîH}ï3Ûîƒî"=î%€î&©î)Ìî,)î/+î1àî5î6ºî9î<ï0Öî!î$ƒî&ìî,5î/ î1wî4oî7|î:1î<-î>=î@§îE„îGîHsï/0î,î îmî sî#!î%î&Åî)'î-vî/2î1”î6¿î;Öî?>îA îEÄîG€ï-Šî¦ï*…î¦îµîäî”î"2î%tî' î+ïî.4î0Óî?ÕîCÒîH&ï(ßî¢îƒî,*î0hî2äî6|î9�î>T îEgîG€ï':î@î#oî(Šî,î-Èî2vî4Þî7ëî9Kî:Àî@ÙîB�îG€ï%”î ‘î&&î'éî0× î6¹î:×îAÔï"�îC5 ï éî¦îIî¿î$ÿî'Sî/î0£î2«î6#î8ñî>rî@èîDîG€ïCî¦î½î]î(6î,î0Dî5Šî;?î=î?“îC,îHsï�î¦î î!Àî"£î%î*6î.î/ûî6Î î=«î@îE>îGîïøî¦îî¿î ©î%Àî(zî+Aî0…î3Kî=î?UîA¢îCk ïRî¦îOî>î!$î"Ñ|ïíî ìîiî» xïˆî ìî Ôî‘î[î–îÏîL î"Úî$çî&"î(Oî*î/R î5?î6~î:bî<,î?ÄîB(îEsîG€ïãî ìîî<îãîŒî#+î&ðî)úî+òî/4î17î2iî5hî:ûî<±îBZ ï=î ìî 9î–îßî½î¹ î#}î&î);î,î1îî4€î:mî>iîD·îHï —î ìîî¹îáîúîÏî"Üî(Ôî-Úî0î5î7ºî<îAB ïî(!ÿÿ} `m$ xïZ’îVî%ÿî0î?QïUçîcïTAîDî#�î>‚îCwïRœî0œ ïPöîúïOPî.¹î3ÝïMªî!‡ ïGZîA‚ïE´î;ýïA î?ï?cîDOï=¾î7rîD ï:rîoï7&î¦ï5�î ïî(fï/0î¦ï*…î6© ï(ßî%¥ï':î¦ï%”î¦ î*qï"�î ìîˆïCî Úï�îŒïøî5º ÿÿ} à`m$xxïUçî7“î;ÂïTAî1Ëî5úïOPîgî–ïJ¥î¦î^îîB�îDGîG ïGZî)î*¿î-€î8Óî:‹î=LïE´î3‹î5Cî8ïA î;îóî´ï=¾î8Iîyï<î¦îÕî1_ï:rî4çî6Ÿî9`ï8Ìî ï7&î8�î:Fî=ï5�î<¢î@Ðï3Ûî¦îÕï0Öî¦ ï(ßî¦îÕï%”î<î=·î@yï"�î{ï éî+w ÿ} �`m$ŒÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIES[NoSpreadFunction]Returnsthepreviousvalueof'saspect.Ifisgiven,(evenifgivenas),itisstoredasthenewaspect.Someaspectscannotbesetbytheuserandwillgenerateerrors.Anynamethatisnotrecognizedisstoredonapropertylistassociatedwiththewindow.[Function]addsanewitemtoawindowproperty.Ifistoanelementofthepropertyofthewindow,nothingisadded.Ifthecurrentpropertyisnotalist,itismadealistbeforeadded.returnsthepreviousproperty.Thenewitemalwaysgoesontheendofthelist.(Note:Iftheorderofitemsinthelistisimportant,thelistcanbemodiedusing.)isusefulforaddingorfunctionstoawindowwithoutaectingitsexistingfunctions.[Function]deletesfromthewindowpropertyofandreturnsthepreviouslistifwasanelement.Ifwasnotamemberofwindowproperty,isreturned.19.12.7.1MouseFunctionWindowPropertiesThesepropertiesallowtheusertocontroltheresponsetomouseactivityinawindow.Thevalueoftheseproperties,ifnon-,shouldbeafunctionthatwillbecalled(withthewindowasargument)whenthespeciedeventoccurs.Note:thesefunctionsshouldbe``self-contained'',communicatingwiththeoutsideworldsolelyviatheirwindowargument,e.g.,bysettingwindowproperties.Inparticular,thesefunctionsshouldnotexpecttoaccessvariablesboundonthestack,asthestackcontextisformallyundenedatthetimethesefunctionsarecalled.Sincethefunctionsareinvokedasynchronously,theyperformanyinputoperationsfromtheirownwindow.[WindowProperty]Wheneverabuttongoesdowninthewindowandtheprocessassociatedwiththewindow(storedundertheproperty)isnotthettyprocess,theiscalled.Thedefaultis(page18.34)whichgivestheprocessassociatedwiththewindowthettyandcallsthe.[WindowProperty]Wheneverthemousemovesintothewindow,theiscalled.[WindowProperty]Theiscalledwhenthecursorleavesthewindow.[WindowProperty]Theiscalledwheneverthecursorhasmovedandisinsidethewindow.Thisallowsawindowfunctiontoimplement``active''regionswithinitselfbyhavingitsdetermineifthecursorisinaregionofinterest,andifso,performsomeaction.19.29(WINDOWPROP)NIL(WINDOWADDPROP)WINDOWADDPROPEQWINDOWADDPROPWINDOWPROPWINDOWADDPROPOPENFNCLOSEFN(WINDOWDELPROP)WINDOWDELPROPNILNILTTYWINDOWENTRYFNPROCESSWINDOWENTRYFNGIVE.TTY.PROCESSBUTTONEVENTFNCURSORINFNCURSORINFNCURSOROUTFNCURSOROUTFNCURSORMOVEDFNCURSORMOVEDFNCURSORMOVEDFNWINDOWPROPNEWVALUEWINDOWPROPNEWVALUEPROPPROPWINDOWPROPITEMTOADDITEMTOADDPROPWINDOWITEMTOADDWINDOWPROPITEMTODELETEITEMTODELETEPROPWINDOWITEMTODELETEITEMTODELETEPROP|ïb'îŒ î%”î'*î-Ñ xï\:î<µîC˜ïZ”î¦îî’î%Iî)î0\î5ñî;îD<îEÔïXïî¦îlîÕî �î$Êî&+î'‰î(ýî-&î.Üî1Cî8î<Üî@¸îEeïWIî¦î‹îœî‹îßî"Ëî%vî(î-‰î1ûî8Âî¯îCÞîEfïM­î¦îHîÆî «î&bî'íî*€î+Êî.†î/üî1‡î5dî6®î9 îEfïLî#î'¥î)óî/mî5€î8Eî;!î>3îB„îE‹îG€ïJaî¦îZîîlî!*î%Žî' î)iî-î.Ïî2tî4î6{î8µî: î@ÐîC,îEgîGîïH»î¦îiî)wî6>î7ªî;Àî=üîHïGî î$î%±î&Úî,î1î6’î8jî=p ïDîC5 ïBkî#Xî2…î6+î8Êî>2îH&ï@ÅîÉî Äî%¸î([î.*î0¬î<³î?¢îAÖîH\ï?î!Âî$kî&Þî(î-pî/'î4Nî=:îAîB‰|ï:ºî ìîqîýîÇî  xï6Vî ìî Þ îCîÝî.îî¹î#\î%­î+Aî,âî1,î5åî7…î8¢î>HîAîD¬îFWï4°î ì î³îîUî/î¥î’î¹î%,î'õî*œî,‰î0{î4 î6eî;Šî=5îCÐîG€ï3 î ìî�î?ï0î ìî ëî{î}îþî÷î!$ î(} î2&î5Gî7®î<}î@nîDTîF™ï._î ìîî—î{îyîÞî$ î+ î,Û î3gî6ñî<îîAiîCàîH0ï,ºî ìî íî›îêîæî;îüî!¡î#öî'^î,&î-ˆî2þî9hî:÷î=Lî@gîCäï+î ìî ;î±î`î¼î²îî$<î.0î1;î6‹î<.î?Ô îFyï)nî ìî 0î1ï&iî=îîCÚï$Ãî¦îpîÑî$vî'Åî+Äî-©î0>î5�î8Šî;î@' îFÅï#î¦îLî¼î$�î(äî29î8�î:Cî<ÿî?¥îAþîG€ï!xî#Pî$óî*î-%î2îAÔîEÊïÒî¦î1î î"ýî(M î/3î2Ëî5©î;Pî>-î@¾îCóîG€ï,î"’ï'î=îîCÚï�î¦î8î •î$ëî)*î,î.]î3Üî?$î@Žï|î=îîCÚïÖî¦î$>î%¨î)œî-Mî/ªî3Õî7Ýî:;ïÑî=îîCÚï+î¦î%þî'rî+nî1¦î4 î8@î:¼î?GîBîCxîG€ï…î¦îKî Qî$jî%ƒî*™î/þî1šî8i î=¡îBSîF„ï àî¦î®î2î+–î2 î3�î5øî:0î;¨î=bî>™îBæîD«ï :î¦î[î»îÕî#(î&¸ïî(ÿÿÿ}p`m$jxï\:î ì î%/ïXïî"EïRžî ì î(AïPøî¦ îG«ïLî¦ ïH»î! î*Í îB‹ïGî¦ïDî ì î*ŽïBkî¦ ï?î>ï4°îÐï+î9'ï&iî ì ï#î+‹ï!xî¦ î3¦ï,î¦ ï'î ì ï�î69 ï|î ì ïÖî| ïÑî ì ï+î… ï àî  !ÿ}p`m$lxï\:îî/î:îáîqî!ùî#�ïZ”î+î/1î1éî3�î<Ìî@UîAìïXïî48î5ßïWIî4òî6™ïRžî†îµî¿îgî öî%ºïPøî>AîCïORî%î&Äî8\î<‹ïM­î=vîB:ïDî†îµî¿îgî ö ïBkî(' îD îE°ï@Åî¦îÕî2Q ï?î¦ î9ãî;Š ÿÿ}„¤`m$|ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿEventWindowProperties[WindowProperty]Theiscalledwheneverthereisachangeinthestate(upordown)ofthemousebuttonsinsidethewindow.Changestothemousestatewhiletheisrunningwillnotbeinterpretedasnewbuttonevents,andthewillnotbere-invoked.[WindowProperty]Theiscalledinlieuofthestandardwindowmenuoperationwhenthekeyisdepressedinawindow.Morespecically,theiscalledinsteadofthewhen.Ifthekeyistobetreatedlikeanyotherkeyinawindow,supplyandwiththesamefunction.Note:Whenanapplicationprogramdenesitsown,thereisaconventionthatthedefault,(page19.22),maybeexecutedbydepressingthekeywhenthecursorisintheheaderorborderofawindow.Userprogramsareencouragedtofollowthisconvention.19.12.7.2EventWindowProperties[WindowProperty]Thewindowpropertycanbeasinglefunctionoralistoffunctionsthatarecalledjustbeforeawindowisclosedby(page19.26).(Note:Iftheofthelistisaword,itistreatedasasinglefunction.)Thefunction(s)willbecalledwiththewindowasasingleargument.Ifanyofthesaretheatom,orifthevaluereturnedbyanyofthesistheatom,thewindowwillnotbeclosed.Note:Ashouldnotcallonitsargument.[WindowProperty]Thewindowpropertycanbeasinglefunctionoralistoffunctions.Ifoneofthesistheatom,thewindowwillnotbeopened.Otherwise,thesarecalledafterawindowhasbeenopenedby(page19.26),withthewindowasasingleargument.[WindowProperty]Ifnon-,wheneverthewindowisbroughttothetop,theiscalled(withthewindowasasingleargument).Thisfunctionmaybeusedtobringacollectionofwindowstothetoptogether.Iftheargumentof(page19.26)isnon-,theofthewindowisnotcalled,whichprovidesawayofavoidinginniteloopswhenusingfromwithina.[WindowProperty]Thewindowpropertycanbeasinglefunctionoralistoffunctionsthatarecalledjustbeforeawindowisshrunkenby(page19.27),withthewindowasasingleargument.Ifanyofthesaretheatom,19.30BUTTONEVENTFNBUTTONEVENTFNBUTTONEVENTFNBUTTONEVENTFNRIGHTBUTTONFNRIGHTBUTTONFN(DOWINDOWCOM)RIGHTRIGHTBUTTONFNBUTTONEVENTFN(MOUSESTATE(ONLYRIGHT))RIGHTRIGHTBUTTONFNBUTTONEVENTFNRIGHTBUTTONFNRIGHTBUTTONFNDOWINDOWCOMRIGHTCLOSEFNCLOSEFNCLOSEWCARLAMBDACLOSEFNDON'TCLOSEFNDON'TCLOSEFNCLOSEWOPENFNOPENFNOPENFNDON'TOPENFNOPENWTOTOPFNNILTOTOPFNTOTOPWNILTOTOPFNTOTOPWTOTOPFNSHRINKFNSHRINKFNSHRINKWSHRINKFNDON'TNOCALLTOPWFN|ïb'î"î%âî+3 xï\:î=îîCÚïZ”î¦î&@î'Õî+óî2Kî5üî7�î8ãî=±î?ˆîBîEgîHïXïî¦îâî•îïî$@î)-î-'î/€î5)î:®î°îCîF,ïWIî¦î%[î&¹î+ßî.|î0âî2Å î9Äî;eî>DîB¥îG(ïU£î¦î%tî(î*�î,~î. ïRžî=îîCÚïPøî¦î&,î'¶î+Êî-–î0kî2Bî4¿î:uî?¼îC¹ïORî#‹î'±î/¯î2·î4–î;[î=|î?îF!ïM­î¦ îæî,­î.î2î6°î8dîF+ïLî,¨î.7î/äî7Tî:î;¬î=†î?¢îDiîG?ïJaî¦îHîáî“î Âî&Hî61îDbîG€ïH»î¦î ïE¶î¦î¡î¼î!± î(Äî.Tî2ÿî4ßîBÓîC¶îGCîH´ïDî¦ îÆî!§î$î3¾î>†îBWîFÜïBkî¦î¾îŸî!Á î(¨î0î2Ëî6¦î9,î=€î?î@éîCoîHï@Åî¦îîÕîþî$§î'õî.î0T î7¡î9Nî=‚î@! |ï<`î ìîqîNîŸ xï7üî=îîCÚï6Vî¦î Ôî%ôî+‚î.î/ìî1î4ïî:]î<î=:î?oîA îGï4°î¦îî î ¸î%î&Kî+�î,ûî15î8Üî<§îAlîEðîG€ï3 î˜î7î}î ¡î!óî({î,Eî-‚î.Õî3Vî4ëî5üî9Ì î@5îBó ï1eî¦îSîEî <î#Xî%¹î*ãî,“î-¿î1«î8]î9áî<ƒî>>îF€îGŒï/¿î¦î!î!íî"æî$Æî&Cî(¾î,‚î25î4Mî7 î8ÞîA:îB`îCèîFcï.îÚî¶îî$:î&ãî)Vî+Eï+î¦î“î#ƒî'ûî*nî2…î4‰î6bï(î=îîCÚï&iî¦îØî$åî*aî,Ñî.§î/¶î3…î8àî:‰î;™î=»î?Y îEÌîG4ï$Ãî¦îoî çî"î#|î%êî-©î.•î1î6;î8õî;yî=yîC ï#î¦îî )î"„î&�î)Ãî*õî0%î2¡î6î:èîA¬îErï!xî¦î¾îî"Bî#ïî%î)ïrî=îîCÚïÍî¦î@î…îzî%Âî(8î-yî.üî4Iî6î8…î;pîDfîEéï'î¦îXî×î#î$íî&7î*? î1Ãî4üî:’î=´î?ÄîCîDíîH´ï�î¦ îÕî�î%7î&äî)Bî+µï|î¦î–î'®î.Bî6gî:“î?î@ðîF4îG€ïÖîîåî"Sî'‹î)î+Šî/ëî4î9¡î:Ûî=Áî?‰îE.ï0î¦îLîþî(2î+–î/×î6áï+î=îîCÚï…î¦î!÷î'=î,ñî/™î1§î2ïî6öî<Šî>kî?³îBîCäï àî¦îƒîåî êî#šî'öî)/î.gî/âî5öî>xîBEîFÅï :î¦îî/î Ýî"î%òî, î."î0Ãî2|î;•î<žî>òîAQîIïî(ÿÿÿ}¸`m$|xï\:î ì ïZ”î¦ ïWIî÷ ïU£î ïRžî ì ïPøîœ ïORî¦ î*ƒïM­î!@ î:¿ ïLî¦ î!»î&Æî2oïJaî*» î8ì ïE¶î7ç ïDî(Ò î4¯ ïBkî+/ï7üî ìï6Vîuï4°î3>ï3 î¦î#ï1eî@Ÿï/¿î¹î;Yï.î¦ï+îî,öï(î ìï&iîbï$ÃîÝî)uï#î î<ìïrî ìïÍîÿî=çï|î0iîC¯ïÖî¦ï0î"¤î1ï+î ìï…î›ï àî8ï :î4ÜîDÎÿ}¸�`m$¤xï|îcî!Y}H `m$ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIESorifthevaluereturnedbyanyofthesistheatom,thewindowwillnotbeshrunk.[WindowProperty]If(page19.27)iscalledwithoutbegingivenaargument(asisthecasewheninvokedfromthewindowcommand)andthewindow'spropertyisnon-,thenitgetscalledwithtwoarguments,thewindowbeingshrunkandthepreviouslycreatedicon,ifany.Theshouldreturnoneoftheentitiesdescribedonpage19.27orreturnthepreviouslycreatediconifitdoesnotwanttochangeit.[WindowProperty]If(page19.27)iscalledwithoutbeinggivenaargument,thewindow'spropertyis,andthepropertyisnon-,thenitisusedasthevalueof.[WindowProperty]Wheneveraniconiscreated,itiscachedonthepropertyofthewindow,socallingagainwillreusethesameicon(unlessoverriddenbythe.Thus,tochangetheiconitisnecessarytoremovethepropertyorcall(page19.27)explicitlygivingaargument.[WindowProperty]Thewindowpropertycanbeasinglefunctionoralistoffunctions.Ifoneofthesistheatom,thewindowwillnotbeexpanded.Otherwise,thesarecalledafterthewindowhasbeenexpandedby(page19.28),withthewindowasasingleargument.[WindowProperty]Ifthepropertyis,thewindowwillnotscroll.Otherwise,itshouldbeafunctionoffourarguments:(1)thewindowbeingscrolled,(2)thedistancetoscrollinthehorizontaldirection(positivetoright,negativetoleft),(3)thedistancetoscrollintheverticaldirection(positiveup,negativedown),and(4)aagwhichisifthescrollingbuttonisbeinghelddown.Formoreinformation,see(page19.24).Formostscrollingwindows,thefunctionshouldbe(page19.24).[WindowProperty]Theispassedastheargumentto(page19.37)whenthewindowisreshaped.[WindowProperty]Thewindowpropertycanbeasinglefunctionoralistoffunctionsthatarecalledwhenawindowisreshapedby(page19.26).Iftheisoralistcontaining,thewindowwillnotbereshaped.Otherwise,thefunction(s)arecalledafterthewindowhasbeenreshaped,itscoordinatesystemreadjustedtothenewposition,thetitleandborderdisplayed,andtheinteriorlledwithtexture.Theshoulddisplayanyadditionalinformationneededtocompletethewindow'simageinthenewpositionandshape.Theiscalledwiththreearguments:(1)thewindowinitsreshapedform,(2)abitmap19.31CLOSEFNDON'TICONFNSHRINKWSHRINKICONFNNILICONFNICONSHRINKWICONFNNILICONNILICONWINDOWICONWINDOWSHRINKWICONFNICONWINDOWSHRINKWEXPANDFNEXPANDFNEXPANDFNDON'TEXPANDFNEXPANDWSCROLLFNSCROLLFNNILTSCROLL.HANDLERSCROLLFNSCROLLBYREPAINTFNNEWREGIONFNNEWREGIONFNGETREGIONRESHAPEFNRESHAPEFNSHAPEWRESHAPEFNDON'TDON'TRESHAPEFNRESHAPEFNTOWHATTOWHATTOWHATTOWHATTOWHATNEWREGIONFN|ïb'îŒ î%”î'*î-Ñ xï\8î¦îjîÊî)î Ðî&gî(bî+î,ºî4úî6î7nî9ÌîA{îBXîD¶ïZ’î¦îOîÂî±ïW�î=îîCÚïUçî¦îÇî# î'Ðî)Wî-hî2Œî6qî:?îAvîG¸ïTAî¦îîwîgî"î'^î*Çî2¼î7çî>¿îAyîCÛïRœî6î"Ìî$8î)|î*Yî-}î.Óî1Ÿî5“î8¬î;W îBXîD¶ïPöî¦îwî î"Öî%= î+âî0°î4î5~î8»îA1îE²ïOPî¦î�î†î%8î*1î0–î2Úî6]î:7î<9î@¤îCA ïMªî¦îkîmî Ìî""î%Oî'Âî+î,Èî1lïJ¥î=îîCÚïHÿî¦î®î#{î'Ÿî)î-î26î6î9Ðî@ïîG€ïGZî¦î#Cî(ßî,Õî-·î0rî6»î(î?iîA½îC� ï2Âî¦î5îìî²î&Öî'ìî)eî+Ðî3Œî4vî6áî<î>ÍîANîCKï1î¦ îºî(î)?î+Äî/ëî3Wî5çî;Bî=èîAuîGãï/vî î!Èî&3î)Kî+¨î0Ïî2{î3¤î7Œï,qî=îîCÚï*Ëî¦îî"–î(î+þî,Ìî/î43î6Îî92î=V îDîEeï)&î¦îªîèî rî">î%U î,Ÿî.Úî1Lî6ˆî:dî?çîB"îD”ï'€î¦îŠîgîJî!Þ î(�î.ˆî4Iî6-î:î?¸îA›îE#îG€ï%Úî¦îîÃî"}î$=î&®î+‘î1gî7î9…î?îC³îF{îH´ï$4î¦îLî^î!2î"šî$þî*„î.ùî0kî4:î7Yî;»î>kîB ï"�î¦î&Gî*î.ªî1Wî4µî:7î@?ï éî¦îî!“î2Nî6 ïäî=îîCÚï>î¦î$²î&Vî*òî,Ùî9„î?âï˜î¦îcîvî#'î%…î*«î,ï“î=îîCÚïíî¦î"Dî'Fî,µî/î0âî1åî5§î:÷î<“î=–î?¬îA>îGïGî¦îáî¿î!Zî"lî'}î(Ñî.‡î5ãî9‰î>î?‚ï¢î¦î²îjî ˆî"¸ î-”î.eî0·î5Óî8qî:Ùî<½îC ïüî¦îì î Àî"úî&Öî)øî,>î1Mî3©î6ëî<ýî>¿ îEfïVî¦ î,îÂî"î$Ûî*]î,£î/Wî1ôî6T î<²î?OîA•îFbï °î¦îËî î+î/£î4^î7 î=ˆ îEï î¦îTî8î!–î'™î+£î-Pî/¯î2›î7Ùî:�î>óï eî¦îîî 0î#½ î*ëî-î/{î4©î6\î8;î>îAÓîCÿîE.ïî(!ÿÿÿ}Ø`m$¶xï\8î/î=HïW�î ìïUçîDïTAî-)ïRœî¦î&÷ïPöî;šïJ¥î ìïHÿî8ïGZî¯î*Pî2Õî@‡ïB¯î ì ïA î<” ï?cî#Bï=¾îï:¸î9 ï9î/ï6 î ìï4hî”ï2Âî î/Xï1î!Kï/vî¦ï,qî ìï*Ëîhî)yï$4îÐï"�îü îB ï éî#‚ïäî ì ï>î¶ îAÉï“î ìïíîVïGî0kîAÉï¢îî)`ï °î"ýï îAÉ!ÿÿÿ}Ø@`m$˜xïUçî;„î=<î?þïOPî#î Ûî#�ïHÿî; î<Áî?‚ïE´î$Gî%ÿî(Àï9î3�î5Eî8ï>î/p "} ,`m$6ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿMiscellaneousPropertieswiththecontentsoftheoldwindow,and(3)theregionwithinthebitmapthatcontainstheoldimage.Thisfunctionisprovidedsothatuserscanreformatwindowcontentsorwhatever.(page19.33)isthedefaultandshouldbeusefulformanywindows.[WindowProperty]Thewindowpropertycanbeasinglefunctionoralistoffunctionsthatarecalledtorepaintpartsofthewindowby(page19.27).Thesarecalledwithtwoarguments:thewindowandtheregioninthecoordinatesofthewindow'sdisplaystreamoftheareathatshouldberepainted.Beforetheiscalled,theclippingregionofthewindowissettoclipalldisplayoperationstotheareaofinterestsothatthecandisplaytheentirewindowcontentsandtheresultswillbeappropriatelyclipped.(Note:(page19.27)shouldnotbeusedinsbecauseitresetsthewindow'scoordinatesystem.Ifawantstoclearitsregionrst,itshoulduse(page19.12).)[WindowProperty]Iftheis,thewindowwillnotbemovedby(page19.26).Otherwise,iftheisnon-,itshouldbeafunctionoralistoffunctionsthatwillbecalledbeforeawindowismovedwithtwoarguments:thewindowbeingmovedandthenewpositionofthelowerleftcornerinscreencoordinates.Ifthereturns,thewindowwillnotbemoved.Ifthereturnsa,thewindowwillbemovedtothatposition.Otherwise,thewindowwillbemovedtothespeciednewposition.[WindowProperty]Ifnon-,itshouldbeafunctionoralistoffunctionsthatwillbecalledafterthewindowismoved(by,page19.26)withthewindowasanargument.19.12.7.3MiscellaneousProperties[WindowProperty]Accessesthetitleofthewindow.Ifatitleisaddedtoawindowwhosetitleisorthetitleisremoved(setto)fromawindowwithatitle,thewindow'sexterior(itsregiononthescreen)isenlargedorreducedtoaccomodatethechangewithoutchangingthewindow'sinterior.Forexample,changesthetitleoftobe``Results''.removesthetitleof.[WindowProperty]Accessesthewidthoftheborderofthewindow.Theborderwillhaveatmost2pointofwhite(butnevermorethanhalf)andtherestblack.Thedefaultborderisthevalueoftheglobalvariable(initially4).[WindowProperty]Usedtolimitscrollingoperations(seepage19.23).Accessestheextentregionofthewindow.Ifnon-,theisaregioninthewindow'sdisplaystreamthatcontainsthecompleteimageoftheobjectbeingviewedbythewindow.Userprogramsareresponsibleforupdatingthe.Thefunctions,19.32RESHAPEBYREPAINTFNREPAINTFNREPAINTFNREDISPLAYWREPAINTFNREPAINTFNREPAINTFNCLEARWREPAINTFNREPAINTFNDSPFILLMOVEFNMOVEFNDON'TMOVEWMOVEFNNILMOVEFNDON'TMOVEFNPOSITIONAFTERMOVEFNNILMOVEWTITLENILNIL(WINDOWPROP'TITLE"Results")(WINDOWPROP'TITLENIL)BORDERWBorderEXTENTNILEXTENTEXTENTUNIONREGIONSWINDOWWINDOWWINDOWWINDOW|ïb'î"! î+ xï\:î¦îßî\î"æî$¾î'<î)Äî/kî2@î4†î7î;cî?ÄîBBîGïZ”î¦îFîåî"Žî'Þî+7î0íî2™î8¦î:ªî=·îAsîD=ïXïî¦îÃî""î#Ûî9Ëî=}îA†îBæîE9ïWIî¦î[îÓî Âî$×î'î*ÙïTDî=îîCÚïRžî¦î"­î'âî-†î0î2î3Rî7Iî<Ìî>�î?ÔîBîCäïPøî¦îtîÇî ½î"lî'î*ƒî,<î.œî3Äî>­îBkîGïORî6î ]î"Îî&áî*î,á î4Aî6¾î<î>ØîAUîE´îG€ïM­î¦ îÿî Îî#Bî)\î.!î2¤î4sî6çî9õî<×îAfîCl ïLî¦îî&¦î(î,vî.ßî44î8î:Bî<«îAÞîCTîEzîG3ïJaî¦î«îq î%/î&óî)gî,tî.Cî34î5 î7ðîB�îE/ïH»î¦îîî#\î(Þî+«î.!î2…î5Fî7M î?ÐîExïGî^î!Cî%î* î,»î.Óî25î;›î<ËîBîC�îG€ïEpî¦îÓ î$¼î*7î+âî5tî9|î;Tî>Íî@ÐîE;îHˆïCÊî¦îî$÷î(³ï@Åî=îîCÚï?î¦î.î!)î&Îî'²î*î/Eî1õî4oî6fî:ïîA¯îEsï=yî¦ îqîÆî'›î(ûî.?î/î0Zî4Çî6«î7Éî=2î>êî@îB8îCäï;Ôî¦î•îbîtî#Œî'úî)Gî.‘î0î4Åî8î:Í îB5îD¶ï:.î¦îzî î"Éî%3î(*î-sî/7î1 î5sî7òîîBD ï8ˆî¦îJî!{î*€î+î-ÿî3Iî6î8«î:½î@+îAÎï6âî¦îcî$Rî%;î'¦î,Ûî/‘î1Žî6î7Øî:²î@› îG€ï5=î¦îÍîvî!eî%çî'”î)ñî/’î2}ï27î=îîCÚï0’î¦î4îyîbî Äî%Iî'Fî(|î-þî/Îî1î3Mî5î;î=ñî@§îB£îF¤ï.ìî¦îî*î •î%î+¼î,˜î/Üî3îî7î9cî>Šî@7îB%|ï*‡î ìîq îh xï&#î=îîCÚï$}î¦îtî î#î$ÿî'•î-ëî/¤î1î4 î5®î:î;íî=OîB¯îGï"×î¦î©î³î!Xî$kî&î,î.ëî3dî4©î8Tî9Åî?3îB“îDîG€ï!1î¦î°î"Éî%"î)iî+uî-Úî2�î4î9Ÿî;iî@¯îBd ïŒî¦î î·î#Æî)¥î, î2î7•î:Fïæî,Éî2î4›î7�î?nîAAîCW ï@î1®î7î9sî<>îCNï;î=îîCÚï•î¦îFî¯î#˜î%[î'Ãî,Fî.î0qî6=î9î= î@TîC£îEEîH©ïïî¦îIîî Íî#Ìî'šî+2î.\î0Ñî1Õî4’î6öî9�î=Ýî@ºîEfïJî¦îînîî Ìî#)î'Hî2ß î8RïDî=îîCÚïŸî¦îGîî Xî%æ î,žî/xî2Ìî7“î=8î?¦îCÖîH&ï ùî¦îîÛî!gî&«î'’î/•î1 î2>î6‰î8Aî:ªî@·îEqï Sî¦îoîËî"&î(î, î-Áî0î4.î7óî<”î>‹î@æîF�ï ­î¦îŽîº î&¿î(Õî.rî5´î6iî9îIïî("}8`m$îxïXïî*1ïTDî ìïRžîŠïPøî5À ïORî¦ïLî†ïJaî:dïGî¦î4 ïEpî-5ïCÊî‘ï@Åî ìï?î“î"›î<ðï=yî"î+ºï8ˆîÊî&MîDOï6âî™ï27î ì ï0’îóï.ìî'‰ï&#î ìï"×îXî0ßïŒî@ ïæî×î#¸ ï@î¦ î'ìî-Íï;î ìïJî,zïDî ìï ùî$&î)ûï ­î0©î>ì ÿÿÿ}8`m$ˆxïæî¦îÕî9jî=™ï@î!»î%êî=õîB$ÿ} T`m$ ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIES,etc.(page19.3)areusefulforcomputinganewextentregion.Insomesituations,itisusefultodeneanthatonlyexistsinonedimension.Thismaybedonebyspecifyinganregionwithawidthorheightof.handlingrecognizesthissituationasmeaningthatthenegativedimensionisunknown.[WindowProperty]Ifthewindowpropertyisnon-,itshouldbeaandwillbemadetheTTYprocessby(page18.34),thedefaultproperty.Thisimplementsthemechanismbywhichthekeyboardisassociatedwithdierentprocesses.[WindowProperty]Iftheisnon-,itwillbecalledwiththewindowasasingleargumentwhenthewindowisfull(i.e.,whenenoughhasbeenprintedsincethelastinteractionsothatthenextcharacterprintedwillcauseinformationtobescrolledothetopofthewindow.)Iftheis,thesystemfunction(page19.33)iscalled.Note:isonlycalledonwindowswhicharetheofsomeprocess(seepage19.15).Thefollowingpropertiesareread-only(i.e.theirpropertyvaluescannotbechangedusing.[WindowProperty]Valueisthedisplaystreamofthewindow.Allsystemfunctionswilloperateoneitherthewindoworitsdisplaystream.[WindowProperty][WindowProperty]Valueistheheightandwidthoftheinteriorofthewindow(theusablespacenotcountingtheborderandtitle).[WindowProperty]Valueisaregion(inscreencoordinates)indicatingwherethewindow(countingtheborderandtitle)islocatedonthescreen.19.12.8AuxiliaryFunctions[Function]Itstheoldregioncontentsintothelowerleftcornerofthenewregion.Ifthenewshapeislargerineitherorbothdimensions,thenewareasexposedaretothetopandrightoftheoldimage.Whenthishappens,calls's(page19.32)todisplaythenewlyexposedregion'scontents.Notethatthismayresultintwocallstothe.[Function]Ifthewindowproperty(page19.33)is,whenthewindowisfullthesystemfunctioniscalled.simplyreturnsiftherearecharactersinthetype-inbuerfor,otherwiseitinvertsthewindow19.33EXTENDREGIONEXTENTEXTENT-1SCROLLFNEXTENTPROCESSPROCESSNILPROCESSGIVE.TTY.PROCESSWINDOWENTRYFNPAGEFULLFNPAGEFULLFNNILTTYPAGEFULLFNNILPAGEFULLFNPAGEFULLFNTTYDISPLAYSTREAMWINDOWPROPDSPHEIGHTWIDTHREGION(RESHAPEBYREPAINTFN)BITBLTRESHAPEBYREPAINTFNREPAINTFNREPAINTFN(PAGEFULLFN)PAGEFULLFNNILPAGEFULLFNPAGEFULLFNWINDOWOLDIMAGEOLDREGIONWINDOWWINDOWWINDOW|ïb'îŒ î%”î'*î-Ñ xï\:î!»î"—î%Kî)î,kî.¼î2Ñî5 î;àî= î?ôîDïY5î¦îÂî¡ î$tî&î'Ñî,4î.0î2Ÿî:¹î=ÓîA9îE9îG4ïW�î¦ î î"Rî%mî'wî+î- î3 î;Rî?¬îBßîD"îHïUéî¦îøîyî(+î-ý î4µî7oî= î>èîD˜îG€ïTDî¦î"žî)Eî*°ïQ>î=îîCÚïO™î¦î;î"&î'aî- î.‰î3Íî4½î6&î:²î<µîDkîG4ïMóî¦îÞîäî ‹î$,î)Eî9Æî=ÌîB’îE9ïLMî#„î*æî.k î6<î9î@ îCîG€ïJ§î¦î©î î%zî(’î. ïG¢î=îîCÚïEüî¦îXî%î&œî+áî,íî.sî1Mî3lî7‘î:Ùî=gîB¿îDœîEõïDWî¦îÛî!žî$ î)Cî*¿î-Xî0xî4:î90î;´î?îCÿîG€ïB±î¦îs î$kî&Pî)?î+Àî.ïî4öî9éî<µî@Š îH0ïA î¦î°îÜî!î#‰î&î'éî*aî0Ôî2oî=íîA÷îBîîEfï?eî¦î&î)Âî-Õî/@ï<`î¦î$Cî%†î(vî,Cî. î3¤î7‡î9±ï:ºî¦î^îîî!½î$‡î'Ëï7µî ìî ¸î» î#îkîxî!†î$aî'œî-(î1Iî5¸î7�î<þîIï4°î=îîCÚï3 î¦î°î1î¤î$iî(ëî*¹î--î3î5�î:î@îBÝîGÙï1eî¦î�îìî#î$Öî&®î+]ï._î=îîCÚï,ºî=îîCÚï+î¦îžî îoî#©î&bî*Eî,î.bî3Lî5î7iî<”î?oîC´îGjï)nî¦îRî¯î$'î&Üï&iî=îîCÚï$Ãî¦î·î?î…î"âî%$î)w î1O î7Èî;úî>tîC¸ï#î¦îî{î!0î$tî%Þî*˜î,�î.ú|ï¹î ìîiîUxïTîC5 ï®î¦îîî!eî#¿î'òî-Oî0î2hî6!î8‡î<Åî>pî@ÀîCžîH\ïî¦îýîâî ¹î"î%ÿî'¥î+‡î-Cî0v î7ôî:Kî=0î@£îEåîH0ïcî¦î î�î:î"Žî$Kî&­î)î-´î1Íî4qï½î¦î 1î)ïî-Ñî2 î3Ûî8¯î;1î?TîDÂïî¦î“î!î#Òî&qî)rî-:î.æî1�î4œî6Iî@6ïîC5 ï lî¦îîZî lî.Âî2iî6gî:Bî; î>¥î@íîEÿîGTï Çî¦îî„î,ìî.[î;Ïî@@îDóîFWï !î¦î î �î">î$­î'¯î)lî-’î58î6%îî ìïO™î¬î1Hî=òïMóî+ˆïLMî¦ ïG¢î ì ïEüîæ î)\ïB±îGïA î4ç î?rï?eî ï<`î î;èï7µî@› ï4°î ìï._î ìï,ºî ìï&iî ìïTî ìî/šï®îïcî:9ï½î!¶ïî8¦ïî ì îZï lî%ì î7½ï Çî#ý î2à "ÿÿ}¼4`m$†xïTîºîèî óî%·î(Fï½îØîïîî/ï !î/ßî4 "ÿÿ}ð,`m$*ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿExample:AScrollableWindowandwaitsfortheusertotypeacharacter.isuseradvisable.19.12.9Example:AScrollableWindowThefollowingisasimpleexampleshowinghowonemightcreateascrollablewindow.createsawindowthatdisplaystheprettyprintedexpression.Thewindowproperties,,andareusedforsavingthisexpression,andtheinitialwindowposition.Usingthisinformation,simplyreinitializesthewindowposition,andprettyprintstheexpressionagain.Notethatthewholeexpressionisreformattedeverytime,evenifonlyasmallpartactuallylieswithinthewindow.Ifthiswindowwasgoingtobeusedtodisplayverylargestructures,itwouldbedesirabletoimplementamoresophisticatedthatonlyredisplaysthatpartoftheexpressionwithinthewindow.However,thisschemewouldbesatisfactoryifmostoftheitemstobedisplayedaresmall.resetsthewindow(andstorestheinitialwindowposition),callstodisplaythewindow'sexpression,andthensetsthepropertyofthewindowsothatwillbeabletohandlescrollingand``thumbing''correctly.19.34PAGEFULLFNCREATE.PPWINDOWEXPRPPEXPRPPORIGXPPORIGYREPAINT.PPWINDOWREPAINTFNRESHAPE.PPWINDOWREPAINT.PPWINDOWEXTENTSCROLLBYREPAINTFN(DEFINEQ(CREATE.PPWINDOW[LAMBDA(EXPR)(*rrb``4-OCT-8212:06'')(*createsawindowthatdisplaysaprettyprintedexpression.)(PROG(WINDOW)(*asktheuserforapieceofthescreenandmakeitintoawindow.)(SETQWINDOW(CREATEWNIL"PPwindow"))(*puttheexpressiononthepropertylistofthewindowsothattherepaintandreshapefunctionscanaccessit.)(WINDOWPROPWINDOW(QUOTEPPEXPR)EXPR)(*settherepaintandreshapefunctions.)(WINDOWPROPWINDOW(QUOTEREPAINTFN)(FUNCTIONREPAINT.PPWINDOW))(WINDOWPROPWINDOW(QUOTERESHAPEFN)(FUNCTIONRESHAPE.PPWINDOW))(*makethescrollfunctionSCROLLBYREPAINTFN,asystemfunctionthatusestherepaintfunctiontodoscrolling.)(WINDOWPROPWINDOW(QUOTESCROLLFN)(FUNCTIONSCROLLBYREPAINTFN))(*callthereshapefunctiontoinitiallyprinttheexpressionandcalculateitsextent.)(RESHAPE.PPWINDOWWINDOW)|ïb'î Bî&Oî'Å î.5xï\:î¦î[îÕî î"nî%dî'î*î+G î:˜î<î>ø |ïWÕî ìîiîwîí î\xïSqî ìî ÁîÎî8îaîÂî5î$“î'”î*>î.1î20î3Y î9qïPlî3îßî2î"‚î%wî*Òî-Yî1‚î6{ î@³îA·îD¶ïNÆî ì îgî$îî&î(kî+¤î-ßî2î4³ î;½î>qî@ÎîD¶ïM î ìî;îiî7 î-sî2 î9tî<îAXîG(ïKzî ì îSî³ îhî›î"î$àî'@î+L î2î3o î:ëî>ŸîBîEcîFÆïIÕî ìî #îÌî»îÛî[îªî î%êî'yî*&î/[î2î5èî7£î9 î<çî>¢îC_îFyïH/î ì îzîÈîìîÔî™î?î&î':î*à î:èî=­î@½ îGïF‰î ìî îîÆîE îîzîøî%î+^î.î3î7eî9u î@¬îB-îE§îG€ïDãî ìî ’î?î.îHî™ïAÞîµîPî‚î§î"|î%~î)/î+`î,ìî/î1Bî4î6~î:ï@8î ìî î ±îîçî îUîªîî!æî%î(–î+ î4cî:eî<ˆî?QîAvîDãîGï>“î¸îaîPî Fî!óî&vî)˜î+ôî.© î6Nî8'ïî(!ÿÿÿ}œ`m$¤xï\:î1­ ïPlî ìî=VïNÆî]îCîµïM îNïH/î2ÛïAÞî ìî<âï@8î.iï>“î ìï;�î ìï8Bî ìï6œî šîS{î'Tî) î+Rî,‘î-ºî1)î3ï4öî'Tî) î-Œî.Éî3£î6|ï3Qî'Tî(“î,tî1 xï0î HîS{î'Tî) î+�î-ãî0Îî2ýî49î7¨î9Sï._î'Tî+tî.î1Ïî3.î5úî76xï,ºîSî]î?î$Ïî(+î+‡{ï+î'Tî) î+vî-Ë î4`î6\ï)nî'Tî,¦î.ìî0–î2éî7Âî9‚ï'Èî'Tî)§î.Bî0ìî5Ðï&#î'Tî)ðî. xï$}îS îhî"Iî(+ï"×îh{î'Tî) î+'î-{î2î4Ãï!1î'T xïŒîS îhî"Iî(+ ïæîhî$Ïï@îS îhî"Iî(+ ïšîhî$Ï{ïõî'Tî) î,Àî/î2¼ïOî'Tî8Fî9�ï©î'Tî,¥î/~î2kî4¿ïî'Tî,§î.Vî0F xï^îS îhî"Iî(+ï¸îhî$Ï{ïî'Tî) î+¨î-üî2âî83ï lî'Tî,Qî/¢î1õ î8‰ï Çî'Tî-î.îxï !îSî!r!ÿÿÿ}œx`m$fÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIES19.35(RETURNWINDOW])(REPAINT.PPWINDOW[LAMBDA(WINDOWREGION)(*rrb``4-OCT-8211:52'')(*therepaintingfunctionforawindowwithaprettyprintedexpression.Thisrepaintingfunctionignorestheregiontoberepaintedandrepaintstheentirewindow.)(*setthewindowpositiontothebeginningoftheprettyprintingoftheexpression.)(MOVETO(WINDOWPROPWINDOW(QUOTEPPORIGX))(WINDOWPROPWINDOW(QUOTEPPORIGY))WINDOW)(PRINTDEF(WINDOWPROPWINDOW(QUOTEPPEXPR))0NILNILNILWINDOW])(RESHAPE.PPWINDOW[LAMBDA(WINDOW)(*rrb``4-OCT-8212:01'')(*thereshapefunctionforawindowwithaprettyprintedexpression.)(PROG(BTM)(*setthepositionofthewindowsothattherstcharacterappearsintheupperleftcornerandsavetheXandYfortherepaintfunction.)(DSPRESETWINDOW)(WINDOWPROPWINDOW(QUOTEPPORIGX)(DSPXPOSITIONNILWINDOW))(WINDOWPROPWINDOW(QUOTEPPORIGY)(DSPYPOSITIONNILWINDOW))(*calltherepaintfunctiontoprettyprinttheexpressioninthenewlyclearedwindow.)(REPAINT.PPWINDOWWINDOW)(*savetheregionactuallycoveredbytheprettyprintedexpressionsothatthescrollingroutineswillknowwheretostop.Theprettyprintingoftheexpressiondoesacarriagereturnafterthelastpieceoftheexpressionprintedsothatthecurrentpositionisthebaselineofthenextlineoftext.Hencethelastvisiblepieceoftheexpression(BTM)istheendingpositionplustheheightofthefontabovethebaselinee.gitsASCENT.)(WINDOWPROPWINDOW(QUOTEEXTENT)(createREGIONLEFT_0|ïb'îŒ î%”î'*î-Ñ xïî("ÿÿÿ}$`m$xï\GîSî ïWœî ìïU÷î šîSî {î'Tî) î+Rî,‘î-ºî1)î3ïR«î*îÝî. î—î"åî%î&Lî+$î.$î/_î3<î7Õ ïQî*î> î§î!õî&¢î(ôî-î.Èî0�î6€î9)ïO`î*î�îwïLî'Tî) î+%î-xî2Rî7eî9ïJnî'Tî-Šî/6î1‰î5iïHÉî'Tî)î+] xïG#î Hî îî#øî)ÙïE}î îî#øî)ÙïC×îïB1î Hî¯ îÄî%¦î+‡ï@Œî¯î]îºîî!rï;áî ìï:;î šîS{î'Tî) î+Rî,‘î-ºî1)î3ï8•î'Tî) î+`î0Fî2Éî5—î7Èï6ðî'Tî)[î,0î/3î0rî4Sï5Jî'Tî(´î+xï3¤î HîS{ï0Yî*îÞîøîJî�î\î î"Wî$_î'0î(ðî+Çî.î0Ñî4¥î6¾î8î;«ï.³î*î|îèîBî©îßî"ˆî%}î'Ïî)Xî,î-Šî/¸î2 î6¥î9'xï+gîSîºï)ÂîS îhî"Iî(+ï(îh î(+î+‡ï&vîS îhî"Iî(+ï$Ðîh î(+î+‡{ï#+î'Tî) î+©î-ýî2™î5î7êï!…î'Tî+5î.‡î0Üî2<î4Žî7pïßî'Tî)©î-î2#î4*xï9îSî!r{ïîîSîîüîOîyîÃî"•î'nî)Oî+¢î/€î4î5{î7Íî:­ïHî*îîRîiîÅî"îî%ˆî).î-î.¿î21î4ùî8×î;›ï¢î*îÕî)î‰îÛî¼î Çî"î#Òî'@î+Yî.’î0æî3yî6èî8“ïüî*îŠîÜî¾îYî î"ôî%Hî'"î)ûî,Aî/î0„î2Øî5ãî8ŽïWî*î}î˜îBîíî Pî$“î&æî)yî-–î1î2¯î5î6cî8µï±î*îÔîHî›î£î î"Fî%î'óî*Fî.hî0î2fî5?î9ï î*îCîýî:î,xï ÀîS îhî"Iî(+ï îØî‘ï tî‘îÄî!rÿÿ}$`m$|ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿInteractiveDisplayFunctions19.13INTERACTIVEDISPLAYFUNCTIONSThefollowingfunctionsallowtheusertointeractivelyspecifypositionsorregionsonthedisplayscreen.[Function]Returnsathatisspeciedbytheuser.waitsfortheusertopressandreleasetheleftbuttonofthemouseandreturnsthecursorpositionatthetimeofrelease.Ifisa,thepositionwillbeinthecoordinatesystemof'sdisplaystream.Ifis,thepositionwillbeinscreencoordinates.Ifisa,thecursorwillbechangedtoitwhileisrunning.Ifis,thevalueofthesystemvariablewillbeusedasthecursor.[Function]Allowstheusertopositiona``ghost''regionofsizebyonthescreen,andreturnstheofthelowerleftcorneroftheregion.Ifisnon-,rstprintsitinthe.thenchangesthecursortoabox(usingtheglobalvariable).Ifandarenumbers,theyaretakentobetheoriginalpositionoftheregion,andthecursorismovedtothenearestcornerofthatregion.Theuseristhenfreetomovethecursoraroundthescreen.Whenamousebuttonisdepressed,aghostregionislockedtothecursorsothatifthecursorismoved,theghostregionmoveswithit.Ifandarenumbers,thecorneroftheoriginalregionthatisnearestthecursorpositionatthetimethebuttonispressedislocked,otherwisethelowerleftcornerislocked.Theusercanchangetoanothercornerbycontinuingtoholddowntheleftbuttonandholdingdowntherightbuttonalso.Withbothbuttonsdown,thecursorcanbemovedacrossthescreenwithouteectontheghostregionframe.Whentherightbuttonisreleased,themousewillsnaptothenearestcorner,whichwillthenbecomelockedtothecursor.Whenallbuttonsarereleased,thelowerleftcorneroftheregionisreturned.Ifisa,thereturnedpositionwillbein'scoordinatesystem;otherwiseitwillbeinscreencoordinates.Example:19.36BOTTOM_[SETQBTM(IPLUS(DSPYPOSITIONNILWINDOW)(FONTPROPWINDOW(QUOTEASCENT]WIDTH_(WINDOWPROPWINDOW(QUOTEWIDTH))HEIGHT_(IDIFFERENCE(WINDOWPROPWINDOW(QUOTEHEIGHT))BTM]))(GETPOSITION)POSITIONGETPOSITIONWINDOWNILCURSORGETPOSITIONNILCROSSHAIRS(GETBOXPOSITION)POSITIONNILGETBOXPOSITIONPROMPTWINDOWGETBOXPOSITIONBOXCURSORWINDOW(GETBOXPOSITION100200NILNILNIL"Specifythepositionofthecommandarea.")WINDOWCURSORWINDOWWINDOWWINDOWCURSORCURSORWIDTHHEIGHTORGXORGYWINDOWPROMPTMSGWIDTHHEIGHTPROMPTMSGORGXORGYORGXORGYWINDOWWINDOW|ïb'î × î'ªî,™ïGöî ìîi îŽî 5xïC‘î ìî ÁîÎîÆîlîÉî!¿î#l î+'î/¿î5€î7Bî<î> î@gîEï@ŒîC5 ï>æî¦îîî%|î(]î)Üî/’î1 î4îA¡îE0îG€ï=@î¦îÙîÃî zî#kî()î*Ãî-rî2î4î6ªî;<î>.îCîE³ï;šî¦îÔî[î ©î#¼î%dî*dî1£î2þî9"î9îî<<îAjîDîEãîG€ï9õî¦ î|î# î*2î+©î0oî5¥î=1îA8îB+îD ï8Oî¦îMî:îäî" î)Ûî0êî2Rî8ƒî9\î;¸î?àîB†îDsï6©î¦îVî¯î((î)–î/Uî6oî:bî;Aî=¡îAKîCîEfï5î¦î%Ãî(lî*[î-”î/@î1žï1þîC5 ï0Yî¦îaîìî"î#íî)Xî*°î/äî4Rî68î=ØîEMîG€ï.³î¦î‚îuî$bî.zî0pî3 î7î9Âî>Lî@BîBÞîH\ï- îàî!1î&vî3eî6 î9Ûî;î<©îIï+gî$î'cî,´î/;î3Žî5dî6¶î9”î=Ýî@cîD«ï)Âî6î Ëî&fî-6î/Žî5šî8®î;î>Êî@~îBtîDØï(î¦îÒîyî Æî%Oî'óî*@î.Zî/³î4$î5Áî8 î<ªî@åîB‹îEFï&vî¦îpîZî¸î!Ðî$Žî&/î)Þî,/î0Nî4ûî7Lî<î@ îA&îEoï$Ðî¦î îÆî ôî$ î(åî*Uî.¼î0oî2Òî7î8Êî;›î=î?cîC“îEï#+î¦îîáî"=î&˜î)Ëî+öî1»î8³î; îAFîC¿îH&ï!…î¦î4îiî#Øî&Ôî(nî-Lî/Úî44î9¡î;hî=õîAHîCÕîHsïßî¦îšîî"ßî)î+~î/Sî1Ôî6.î7§î<¸î?œîB¢îE9ï9î¦îgî‚î"âî$ð î+Øî-šî0Üî4·î7)î9°î>2î@ûîFï“î¦îî…î" î%¤î)8î,‹î1–î5Ôî8Kî<Žî?1îA9îEÔïîî¦î0î‘î#Äî'¢î)Óî,\î0/î4šî9”î=Õî@^îCÙîHsïHî¦î<îŒî#Õî&qî)�î+=î-Žî2/î6Èî:Åî=aî@wîE|ï¢î¦îiîÜî Ìî$öî&úî,î.hî4$î6—î:sî<üîA]îC*îE�ïüî¦îîXî&Íî(Dî.‚î/jî1Óî7tî<½î?qîAlîH}ïWî¦ îdî#Tî)xî*Íî-vî/eî1î5G ïRî¦ïî(ÿÿ}`m$xï\Gî‘î!rî'Tî*°î0’ îÛîD¼ïWVî‘î › î+‡î1iî7KïU°î‘î!r î-6 î7Kî=,îCïReî-6ïP¿î ìï@Œî ì î ï>æî+î7Ê ï;šî4ï9õî>³ï8Oî3xï6©îc î7Üï5îØ ï1þî ìî8¨ï.³î&þï- î#ðî'8 î>í ï+gî¦ ï)Âî¦ïüî)xïLî¦î%î(tî+Ðî/-î2‰ï §îÚî#jî&Æî.Vî0Ûî47î:ð"ÿÿÿ}„`m$žxï@ŒîØîîï;šî+Õî0ï9õî$Ùî)î7=î;kï8Oî+Zï6©î0Ùï1þî]îSî!Íî#–î&6î'þî*žî.Íî0Øî2ï0Yî9î@ï- î¦îMï)Âî"Sî$î)"î*ëï#+î-“î/[î4‹î6Tïüî åî%îC$îGSÿÿ} |`m$hÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIESpromptstheuserfora100wideby200highregionandreturnsitslowerleftcornerinscreencoordinates.[Function]Letstheuserspecifyanewregionandreturnsthatregioninscreencoordinates.promptsforaregionbydisplayingafour-prongedboxnexttothecursorarrow.Iftheuserpressestheleftbutton,onecornerofa``ghost''regionoutlineislockedtothatpointandtheoppositecornerislockedtothecursor.Asthecursormoves,theoutlineexpands.Tospecifyaregion,theusermovesthecursortoonecorneroftheintendedregion,pressestheleftbutton,movesthecursortotheoppositecornerwhileholdingdowntheleftbutton,andthenreleasesthebutton.Ifisaandtheuserpressesthemiddlebutton,thecorneroffarthestfromthecursorpositionisxedandthecornernearestthecursorislockedtothecursor.Onecanswitchfromonecornertoanotherwhilepositioningtheregion.Tochangetoanothercorner,continuetoholddowntheleftbuttonandholddowntherightbuttonalso.Withbothbuttonsdown,thecursorcanbemovedacrossthescreenwithouteectontheghostregionframe.Whentherightbuttonisreleased,thecursorwillsnaptothenearestcorner,whichwillbecomethemovingcorner.Inthisway,theregionmaybemovedalloverthescreen,beforeitssizeandpositionisnalized.and,ifgiven,arethesmallestandthatthereturnedregionwillhave.Iftheuserspeciedregionissmaller,itwillbeincreasedinwidthorheighttothesedimensions.Ifisnon-,itwillbecalledtodeterminevaluesforthepositionsofthecorners.Thisprovidesawayof``ltering''prospectiveregions;forinstance,byrestrictingtheregiontolieonanarbitrarygrid.Whentheuserisspecifyingaregion,theregionisdeterminedbytwoofitscorners,onethatisxedandonethatistrackingthecursor.Eachtimethecursormovesoramousebuttonispressed,iscalledwiththreearguments:,thepositionofthexedcorneroftheprospectiveregion;,thepositionoftheoppositecorneroftheprospectiveregion;and.allowsthecalleroftopassinformationtothe.Thersttimeabuttonispressed,isandisthepositiontheuserselectedforthexedcornerofthenewregion.Inthiscase,thepositionreturnedbywillbeusedforthexedcornerinsteadoftheoneproposedbytheuser.Forallothercalls,isthepositionofthexedcorner(asreturnedbythepreviouscall)andisthenewpositiontheuserselectedfortheoppositecorner.Inthesecases,thevalueofisusedfortheoppositecornerinsteadoftheoneproposedbytheuser.Inallcases,theghostregionisdrawnwiththevaluesreturnedby.[Function]Performsthesamepromptingasandreturnsthespeciedbytheuserinsteadoftheofitslowerleftcorner.19.37(GETREGION)GETREGIONREGIONWIDTHHEIGHTNILGETREGIONNIL(GETBOXREGION)GETBOXPOSITIONREGIONPOSITIONMINWIDTHMINHEIGHTINITREGIONNEWREGIONFNNEWREGIONFNARGINITREGIONINITREGIONMINWIDTHMINHEIGHTNEWREGIONFNNEWREGIONFNFIXEDPOINTMOVINGPOINTNEWREGIONFNARGNEWREGIONFNARGNEWREGIONFNMOVINGPOINTFIXEDPOINTNEWREGIONFNFIXEDPOINTMOVINGPOINTNEWREGIONFNNEWREGIONFNWIDTHHEIGHTORGXORGYWINDOWPROMPTMSG|ïb'îŒ î%”î'*î-Ñ xï\:î¦îøî>î"î$@î%Qî'Ìî+î,åî/`î2kî6“î90î=Çî?ˆîC7îE’ïZ”î¦îSîˆ ïW�îC5 ïUéî¦î¼î.î 9î$æî&$î)$î-xî0Aî5î7åî<9î=úîBD ïTDîÕî%Yî'¯î(óî-Mî/b î6î7Gî:=î?ÁîB�îE¸îG€ïRžî¦îèî ™î"1î$¥î'³î,mî.âî1lî6Nî9î=qî?@î@€îE�ïPøî¦îNî¼î"!î#Òî&¢î*Bî,úî/\î4ßî9.î:�î?î@³îCîGÎïORî¦î"îjî#'î%¢î*dî0•î2Øî7Žî8Õî=’î@ îC"îG€ïM­î¦îúîÑî ¤î%î&úî)�î/aî4-î8ùî;€î>îCîG€ïLî¦îÂîaî¯î% î)]î,ÿî1÷î5°î7ÿî:cî?îAÃîDØïJaî¦îïG\î¦î ûî"dî)î+Ìî.(î1î5¾î8î<¼îA€îCÜîH&ïE¶î”î$œî(î*Šî.Ëî4î5Ÿî9î;æî>YîB»îG€ïDî¦îÑî;î!�î#Jî%§ïA î¦î�îüî!î$aî&ðî+!î,´î1 î57 î<2î>uîC.îE9ï?eî¦îTî[î"ÿî( î*Nî-|î1Dî3¢î6î:„î=:î@hîD0îFŽï=Àî¦îî‰î#î&Rî+Mî/yî1àî6î8¨î:¡î?-îC@îE¨ï<î¦îÁî †î"žî%î(Éî-î1Íî5õî8fî;Èî@JîAÈîG€ï:tî¦îäî î!ëî#«î&î*Ýî/˜î3µî6qî;•î>îCîHï8Îî¦î@îhîÀî#úî&õî(Þî-[î/Cî2Uî4¬î95î=zî?NîAñîD ï7)î¦îï4#î¼î(ˆî)‹î+î/Kî1Äî4Hî>€îGï2~î¦î*îæî$Lî'î+Tî,ûî/~î2›î8bî<Èî>YîC¤îEîGîï0Øî¦î©îVî#4î$÷î)-î*Ùî._ ï-Óî¦î"Ðî$"î)gî**î+gî-øî/Ïî3ªî5?î;¢î?´îA×îDï,-î¦îVî¬î üî$ î)Žî*¯î-}î/- î5¢ î<ÒîB îD=ï*‡î¦î¤ î î"nî&±î(bî*Sî,[î.Mî3ñî7_î;wî=Øî@ÒîB@ îH´ï(áî¦î+îpî"˜î#ë î+î,÷î/‰î1)î2êî7þî:�î=Cî>–îAãîD€îGï'<î¦îîrî Üî%¯î),î,[î.Åî2üî7Hî9î:Lî>¯îC)îD ï%–î!�î#%î'6î*kî. î<Þî=×î@QîE«îG€ï#ðî¦îîGî ÷î#M î*}î7ùî8Íî;#î@XîBîD^ï"Jî¦î2î+î É î(Aî-[îòîB=îD ï³î¦îUî)[î,î.%î1xî3Ìî6Cî9Áî>%îBíîD½îG4ïî¦î¤î¤î"î%“î(Bî*6î-×î9Aî:²î=îBXîDîFxïhî¦îÞîïî#qî%Wî'¡î-î0î;ßî=5î?îBWîG€ïÂî¦î¦î×î"î$‚î* î.ôî0Ëî4Zî8-î:“î>Cïî¦î3î�îêî!iî' î+wî0Hî2!î4 î7kî=…î?¡îB îEÿîGïïwî¦îmîËî!qî%±î'î+Pî.hî0Åî4ïî:…îEÕïqîC5 ïÌî¦îÎî rî$3î+8î9¹î<µîAªï &î¦îGîAî!žî$•î)Cî*ûî4•î6Lî8%î;ëî>^ïî(!ÿÿÿ} (`m$jxïW�î ì î@¤ïTDî¦ïG\î#‹ï4#î9¡îA\ï-Óî&âï ¥î#ñïÿî3ªïqî ì î6ùïÌî-+ îDOï &î-X!} (``m$8xïW�î*îuî"E î*x î4® î?¼ïG\î% ïE¶î¦ ï4#î¦î!˜ï-Óî ï%–î¦ î5i ï#ðî/0î1ï"Jî0Q î;_î=c îHqï ¥î<À ïÿî))î+î91 ï³îh ïî1C ïhî2¦î4�ïÂî@ ïwî< ïqî¯î¥î î!çî$ˆî&Pî(ðî-î/)î0Ñÿÿÿ} ˆ`m$tÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿMenus19.14MENUSAmenuisbasicallyameansofselectingfromalistofitems.Thesystemprovidescommonlayoutandinteractiveuserselectionmechanisms,thencallsauser-suppliedfunctionwhenaselectionhasbeenconrmed.Thetwomajorconstituentsofamenuarealistofitemsanda``whenselectedfunction.''Thelabelthatappearsforeachitemistheitemitselffornon-lists,oritsiftheitemisalist.Themenuincludesapositiononthescreenwhereitwillbedisplayedandameansofspecifyingtheplaceinthemenuthatistobeputatthatposition.Inaddition,thereareamultitudeofdierentformattingparametersforspecifyingfont,size,andlayout.Whenamenuiscreated,itsunspeciedeldsarelledwithdefaultsanditsscreenimageiscomputedandsaved.Menuscanbeeitherpopuporxed.Ifxedmenusareused,themenumustbeincludedinawindow.[Function]Thisfunctionprovidesmenusthatpopupwhentheyareused.Itdisplaysat(inscreencoordinates)andwaitsfortheusertoselectanitemwithamousekey.Whileanykeyisdown,theselectedmenuitemisvideoreversed.Whenallkeysarereleased,'seldiscalledwiththreearguments:(1)theitemselected,(2)themenu,and(3)thelastmousekeyreleased(,,or),andreturnsitsvalue.Ifnoitemisselected,returns.Ifis,themenuisbroughtupatthevaluefrom'seld,ifitisa,oratthecurrentcursorposition.Theorientationofwithrespecttothespeciedpositionisdeterminedbyitseld.[Function]Thisfunctionprovidesmenusthatremainactiveinwindows.displaysatin(isdefaultedasinexceptthatitisinwindowcoordinates).isaddedtothepropertyof.Theandofarereplacedwith,sothatwillbeactiveduringwait.ofissettorestore'simagewhenthewindowisreshaped.Whenanitemisselected,thevalueoftheeldofiscalledwiththreearguments:(1)theitemselected,(2)themenu,and(3)themousekeythattheitemwasselectedwith(,,or).Morethanonemenucanbeputinawindow,butamenucanonlybeaddedtoonewindowatatime.Ifisnotgiven,awindowiscreatedat(inscreencoordinates)thatisthesizeof.returnsthewindowintowhichisplaced.[Function]Thisfunctionremovesfromthewindow.Ifistheonlymenuinthewindowandisnon-,itswindowwillbeclosed(by).Ifis,thelistofcurrentlyactive(open)windowsissearchedforonethatcontains.Ifnonisfound,doesnothing.19.38CAR(MENU)WHENSELECTEDFNLEFTMIDDLERIGHTMENUMENUNILNILMENUPOSITIONPOSITIONMENUOFFSET(ADDMENU)ADDMENUMENUMENUCURSORINFNBUTTONEVENTFNMENUBUTTONFNTTYRESHAPEFNWHENSELECTEDFNLEFTMIDDLERIGHTADDMENU(DELETEMENU)NILCLOSEWNILDELETEMENUMENUPOSITIONMENUPOSITIONMENUPOSITIONMENUMENUMENUWINDOWPOSITION_MENUPOSITIONWINDOWPOSITIONMENUWINDOWWINDOWMENUWINDOWMENUMENUWINDOWPOSITIONMENUMENUMENUCLOSEFLGFROMWINDOWMENUFROMWINDOWMENUCLOSEFLGFROMWINDOWMENU|ïb1î'žï\8î ìîixïWÓî ìî ¦î´îNîî`îÏî·î${î(î)hî+Óî-ºî2sî5xî:î?ØîE³ïV-î ìî ¨ îXîVîþ î$î'9î*Mî+~î.iî3üî9xî=1î>aîD îFƒïTˆî ìîGî<îî î"¹î$�î%×î)Óî,Cî-Šî/åî1»î5€î8Sî9›î>îCa ïRâî ìî Ðî8îî'îqî®î ßî"Xî$Äî'õî+]î-§î0gî3�î5aî:aî;Ïî>;îAlîBåîDîGïQ<î ìî ÝîPî�îÞîöîhî"±î&Úî(Cî+î-î30î5ùî76î;Šî=V îCÛîFLïO–î ìî ¡îîîîÃî7îíîåîmî î áî&½î(”î.aî1ðî4Jî5|î;Ëî=ŒîC ïMñî ì îóî6 î®îûî î"Âî'‡î+£î,Óî0¸î2*î7Qî91 î@fîD îFbïLKî ìî î,îàî¹îïîøî bî&Éî)~ïIFî ìîvîýîéîÐî˜î¦îfî!Mî"Ìî&.î*�î,Üî0kî2Æî6¡î:î;ðîA�îC9îD_ïFAîC5 ïD›î¦îÇî Eî%Ùî*Dî-î/íî2î5Ãî8Ùî;4î? î@�ïBõî¦î©î!ßî&& î-òî0¸î4Cî6�î8þî<î=ÄîA’îC‘îFÅïAOî¦îäîPî ¦î$Ðî'„î*,î+¬î/æî2Yî7–î;‰î>Áî@AîDï?ªî¦îÏîÑî üî#aî,ªî:yî=¥î?$îC+îFWï>î¦ îÀî Ùî#)î&>î+³î-Ëî0î4Fî6îî9î;Vî=ÇîBîD•ï<^î¦î|î!{î"pî(~î)òî0¹î5�î7sî;çî=�î?žîBÚîD]ï:¸îƒî"³î#‹î+Mî/:î0î2lî6Fî7­î<Üî>éî@}îBÖîFyï9î7î&æî*8î+sî,£î-èî5¥î6[î7ùî9kî;£î@CîDIï7mî¦îr î!\î'î*"î.¼î0_î2²î8Iî=|î>Ü îFîHï5Çî ‘ï2ÂîC5 ï1î¦îÒî [î%úî*pî-Pî2î6î7ÅîD«ï/vî/î$öî-gî4œî6zî<ýî?îE‘ï-Ñî¦îÃîjî%î #î%› î33î4ïî9`î;_îB?îH&ï,+îÿîÐî){î7Šî? îAPîFÅï*…î!»î"³î$‘î+©î.mî0xî4|î<)îH&ï(ßî�îî!.î"çî+î,rî0‡î4Eî6¯î;âî=YîCÎîGîï':î¦îÑîDî!Îî$4î'ãî)£î8Xî;yîAVîBÉîFÅï%”î¦î9 î"tî$¦î'î*?î/Ïî2î4kî8±î;rî=¤î@îDqîGï#îî¦îîîÄî$èî'ýî+Òî1´î2�î8î9ýî=µî@ÕîCzîGTï"Hî¦î î*îáîî$¡î'+î(_î,Gî.Ûî1ýî3÷î8"î9Úî<ŽîAÀîCbîD–îH\ï £îsîÎî!1î%,î&Eî+\î,¶î1lî9,î;Aî?f îGïýî¦îînîî#`ïøî î"ºî%î*>î-î53î6�ïòîC5 ïMî¦î©î î)[î,ªî.óî<÷î=½îC(îD~îFÆï§î¦î¨îyîúî%Eî/ î0¯î5ôî6ôî8ñî>;îA îCîGjïî±ïüî¦î"Õî&àî'Øî*Qî,¨î.{î4nî8sî<ðîB¶îD<ïVî¦îáî‹îVî(Eî) î*¡î-kî.Õî<"î?Oïî(ÿ}ä`m$xïRâî7IïFAî ìî,ï?ªî. ï<^îîpî$Kî,Àï:¸î¦î .î,´ï9îr î.ìï5Çî¦ ï2Âî ìî#öï1î>1ï/vîA=ï-Ñî> ï,+î › î,% ï*…î¦ î9î?öï':î, ï#îî(uî,ªî4Kïøî¦ïòî ì î(Ÿï§î3nïî¦ïüî$[ïVî37 ÿÿÿ}äà`m$txïFAîöîgïD›îEÈïBõîNï?ªî)ï:¸î%ï9î¦ï7mî# ï2Âî{îìîî&î"Ëï/vî¦î9î'î+Dî-ßï-Ñî.Íï,+î¦îÕî97î=eï*…î'xï(ßî¦îÕî'uï':î=9ï £î¦îÕî2óïýîÏïøî1ïòîîrîîäî¬î!Sî'tïMî%\î4î5¬î;Ìî?(ï§î(î)µî-�ïüîCîêî! ïVî$´ }ÄÐ`m$–ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIES19.14.1MenuFieldsAmenuisadatatypewiththefollowingelds:[MenuField]Thelistofitemstoappearinthemenu.Ifanitemisalist,itswillappearinthemenu.Iftheitem(orits)isabitmap,thebitmapwillbedisplayedinthemenu.Thedefaultselectionfunctionsinterpreteachitemasalistofthreeelements:alabel,aformwhosevalueisreturneduponselection,andahelpstringthatisprintedinthepromptwindowwhentheuserpressesamousekeywiththecursorpointingtothisitem.[MenuField]Afunctiontobecalledwhenanitemisselected.Thefunctioniscalledwiththreearguments:(1)theitemselected,(2)themenu,and(3)themousekeythattheitemwasselectedwith(,,or).Thedefaultfunctionevaluatesandreturnsthevalueoftheoftheitemifthereisone,orsimplyreturnstheitemifitisnotalistorifitsis.[MenuField]Thefunctionwhichiscalledwhentheuserhasheldamousekeyonanitemformilliseconds(initially1200).Thefunctioniscalledwiththreearguments:(1)theitemselected,(2)themenu,and(3)themousekeythattheitemwasselectedwith(,,or).isintendedforpromptingusers.Thedefaultiswhichprints(inthepromptwindow)thethirdelementoftheitemor,ifthereisnotathirdelement,thestring``Thisitemwillbeselectedwhenthebuttonisreleased.''[MenuField]Ifwascalled,willbecalled:(1)whenthecursorleavestheitem,(2)whenamousekeyisreleased,or(3)whenanotherkeyispressed.Thefunctioniscalledwiththesamethreeargumentvaluesusedtocall.Thedefaultisthefunction(page19.19),whichjustclearsthepromptwindow.[MenuField]Thepositionofthemenutobeusedifthecalltoordoesnotspecifyaposition.Forpopupmenus,thisisinscreencoordinates.Forxedmenus,itisinthecoordinatesofthewindowthemenuisin.Thepointwithinthemenuimagethatisplacedatthispositionisdeterminedby.Ifis,themenuwillbebroughtupatthecursorposition.[MenuField]Thepositioninthemenuimagethatistobelocatedat.Thedefaultosetis(0,0).Forexample,tobringupamenuwiththecursoroveraparticularmenuitem,setitstoapositionwithinthatitemandsetitsto.[MenuField]Thefontinwhichtheitemswillbeappearinthemenu.Defaultisthevalueof19.39ITEMSCARCARWHENSELECTEDFNLEFTMIDDLERIGHTDEFAULTWHENSELECTEDFNCADRCADRNILWHENHELDFNMENUHELDWAITLEFTMIDDLERIGHTWHENHELDFNDEFAULTMENUHELDFNWHENUNHELDFNWHENHELDFNWHENUNHELDFNWHENHELDFNWHENUNHELDFNCLRPROMPTMENUPOSITIONMENUADDMENUMENUOFFSETMENUPOSITIONNILMENUOFFSETMENUPOSITIONMENUOFFSETMENUPOSITIONNILMENUFONT|ïb'îŒ î%”î'*î-Ñ ï\8î ìîiîgxïWÓî ìî wîTî¿îèîsî‹îéî"öïTÎîAsîEßïS(î¦îŽîÛî¤î"\î$î(¯î*nî,Ýî1sî3î5î8:î9¶î:ðî=šîB îEZïQƒî¦îmîäî ”î"/î$¦î'ãî*8î.±î/Èî1Lî2�î7·î:.î>÷îA»îCÄïOÝî¦îZî¿î 7î#î'Àî-hî3hî9îî,ï:ÿîAsîEßï9Yî¦î…î î$î%Šî)†î-Aî/§î2§î5#î8Dî9vî=Õî@qîB~îDvîG¢ï7³î"k î*\ î/ûî4½î7¾î=^î>ôîCîFWï6 î¦ îî!Lî#Êî' î,´î.ùî1vî5Ôî8¨î:îî=kîAáîD”îG€ï4hî¦îõîÊî#î&bî*8î0Jî1Rî7tîB�îD&ï2Âî¦îùî Ïî%î(î,»î=!îACîECîG€ï1î¦î•î"?î$¥î(î-Pî/î1wî4£î6Éî83î;Âî=6î?²î@äîDSï/vî¦îîÖî!�î$¿î'hî)Wî.î20î4�î8ûî:e ï,qîAsîEßï*Ëî¦î"5î$ðî3ýî6¸î8¹î=Iî?€îCCîE³ï)&î¦îÝîhî"î$oî(Nî)¥î.(î0éî2‚î8[î:Kî<žî@}îE²îHsï'€î¦î@î %î%«î'%î+)î.Qî0¿î4Iî7ßî>îBNîE—îGTï%Úî î!#î$3î3æî5‹î8#îF!ï$4î¦îî î"ºî&�î(êî-Ðï!/îAsîEßï‰î¦î˜îñî!Åî$>î(8î*î, î/aî0Ýî3Vî5ûî;ÀîD!îGjïäî¦îrîÎî$'î'î+�î0†î3Xî4öî6Õî;> îCœîFxï>î¦îîíîpî!6î#¬ î+î,Øî/Nî4Žî7î:ûî<~î>ùîAèîEœï˜î¦îîöî" î$àî&Uî*·î,Xî/î4Iî5¾ î= îGwîH\ïòî"?î&/î' î)hî-Eî/îî1Ýî7î9 î:·î=îA?ïíîAsîEßïGî¦î©î î!íî$wî(‚î,¸î/±î1Hî3#î5?î:&îEÿîGï¢î¦îhî 8î!Áî%Ìî(“î.„î0Oî4î6Bî7‰î;…î>»îA7îEîH´ïüî¦ îäî!Ðî%]î'†î2gî4"î5Yî:¥î>ôîAÎîDÿîGÂïVî¦î$î(Kï QîAsîEßï «î¦î‹î†îBî#\î%Èî)~î,6î.5î2Çî4‚î6ïî;~î@‰îBîDpîH&ïî( ÿÿ}ˆ`m$øxïTÎî ìïS(î?…ïQƒî,+ïGæî ì ïBõî)žî. î6%ïAOî¦îAÃï?ªîDƒï>î¦ï:ÿî ì ï7³î¦ ï4hî&Ûî+@î3@î9y ï2Âî.=ï,qî ì ï*Ëî9 î)R ï%Úî¦ î) î=Òï!/î ì ï‰î7Äî=Ÿï˜î? ïòî¦ î#ªïíî ì ïGî;ê ïüî)m ïVî î%Åï Qî ìÿÿÿ}ˆ0`m$zÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿMenuFields,initiallyHelvetica10.[MenuField]Ifspecied,atitlewillappearinalineabovethemenu.Thetitlewillbeinthesamefontaswindowtitles.[MenuField]Ifnon-,themenuitemsarecentered;otherwisetheyareleft-justied.[MenuField][MenuField]Theseeldscontroltheshapeofthemenuintermsofrowsandcolumns.Ifisgiven,themenuwillhavethatnumberofrows.Ifisgiven,themenuwillhavethatnumberofcolumns.Ifonlyoneisgiven,theotheronewillbecalculatedtogeneratetheminimalrectangularmenu.(Normallyonlyoneoforisgiven.)Ifneitherisgiven,theitemswillbeinonecolumn.[MenuField]Theheightofeachitemboxinthemenu.Ifnotspecied,itwillbethemaximumoftheheightoftheandtheheightsofanybitmapsappearingaslabels.[MenuField]Thewidthofeachitemboxinthemenu.Ifnotspecied,itwillbethewidthofthelargestiteminthemenu.[MenuField]Thesizeoftheborderaroundeachitembox.Ifnotspecied,0(noborder)isused.[MenuField]Thesizeoftheoutlinearoundtheentiremenu.Ifnotspecied,amaximumof1andtheisused.[MenuField](popupmenusonly)Ifisnon-,thepositionofthemenuosetisseteachtimeaselectionisconrmedsothatthemenuwillcomeupnexttimeinthesamepositionrelativetothecursor.Thiswillcausethemenutoreappearinthesameplaceonthescreenifthecursorhasnotmovedsincethelastselection.Thisisimplementedbychangingtheeldoneachuse.Ifistheatomortheatom,onlytheXortheYcoordinateoftheeldwillbechanged.Forexample,bysettingthepositionto(-1,0)andsettingto,themenuwillpopupsothatthecursorisjusttotheleftofthelastitemselected.Thisisthesettingofthewindowcommandmenus.Thefollowingeldsarereadonly.[MenuField]Returnstheheightoftheentiremenu.19.40MENUFONTTITLECENTERFLGNILMENUROWSMENUCOLUMNSMENUROWSMENUCOLUMNSMENUROWSMENUCOLUMNSITEMHEIGHTMENUFONTITEMWIDTHMENUBORDERSIZEMENUOUTLINESIZEMENUBORDERSIZECHANGEOFFSETFLGCHANGEOFFSETFLGNILMENUOFFSETCHANGEOFFSETFLGXYMENUOFFSETMENUOFFSETCHANGEOFFSETFLGYIMAGEHEIGHT|ïb'î%âî)ßxï\8î_î;î$5î*EïY3îAsîEßïW�î¦î5î@î xî#Qî&î*™î,Tî-Œî0Nî4[î6Æî;Sî>7îAîCÇîEÅîG€ïUçî¦î î î¹î$àïRâîAsîEßïQ<î¦î'îkîGî!¤î%‚î)(î+yî1}î7¡î:®î<ÿî?gïN7îAsîEßïL‘îAsîEßïJìî¦î×î¥î$†î'î+%î-î/Ÿî3¯î5Žî9ˆî;qî>çîAÎîH\ïIFîïî fî$}î&çî*Ðî-…î0Õî3­î8àî:¤î>ŽïG î¦î-îXîÒî#Ëî&�î)ïî,×î2î3îî:9î;Öî?îAÎîCTîG€ïEúî¦î?îåî ‹î"w î(Ûî*…î0î2[î7À î>ÞîC=ïDUî¦îÁîoî&kî1øî3gî8!î9¦î>Xî?ÇîCÕîF7ïB¯î¦îOî>îëî ”ï?ªîAsîEßï>î¦îpî›î Gî#iî&€î)*î*Ëî-î1yî2îî5Vî;Eî<�î?,îAîCbï<^î¦îLî˜î¼î!bî*Ùî-|î/Èî4pî6î8£î=ÄîDîE©ï9YîAsîEßï7³î¦îƒîiî (î#]î&‡î)Cî*÷î-\î1Óî3[î5Öî;Øî=4î?åîAÛîD@îH&ï6 î¦îîZî!|î#)î%†ï3îAsîEßï1bî¦î™î^î3î!­î&Aî+î.cî1¢î50î6Îî9^î?{î@ËîCeîHsï/½î¦ï,·îAsîEßï+î¦î~î)îâî!Bî%çî*£î-î0íî5Tî6×î9Lî?Gî@rîFðîH©ï)lî¦î[î)î*jï&gîAsîEßï$Áî¦îqî Ìî$Vî2éî4Nî9’î:hî<ÀîA÷îC¨îFï#î¦îˆî#înî"Íî& î'yî-Jî.åî5’î7„î:�î=îAîCöîGÍï!uî¦î¸îàî’î!õî%tî*¶î/–î1Hî3«î8hî;…î>3îAëîDMîH0ïÐî¦îpî:î!¶î%Nî(ýî+î-›î1îî3lî5èî:0î<Áî?RîCòîG€ï*î¦î? î ¶î#èî%n î-Ôî/éî5ÜîA[îD�îF¯ï„î¦îôî)Íî+Uî-Ïî2ßî4¾î79î;§î< î?ÔîBOîCøîE×îHRïÞî¦ î]î î+Gî.Xî0ùî2áî8Ëî;mîA3îC%îG€ï9î ©î%ýî'Âî(´î+€î.Lî?ûîB—îC‹îFï“î¦î_î9îYî!*î$î&rî*¬î,&î.Õî0‘î2þî5€î7Gî9³îÙî¦î,î†îöî%†î'9î)-î1aî2Ñ î9 îHsï=3î¦îšîGî!;î#˜î,Ôî.>|ï8Îî ìîiî—îCî@xï1eî ìîÄîßî¯îºîOî"î#»î$×î(²î-tî2ãî7Rî8¯î?rîBîCðï/¿î ì îÉîrîaïÒî ìîßîîßîìî0î gî#*î&Qî(½î,rî.-î0î2(î4î8î<äî>ŸîD½îF¯ï,î ìî oîöî6îéî»îÒîîäî!«î$$î&Ôî*î,‚î0³î2fî4Êî: îApîCêîF™ï†î ìî Iîsî î}îøîÑî"î#°î& î+— ïî(!ÿÿÿ}`m$ˆxï\:î ì ïQËî ì îºïP%î9‡ïM î ìî$ÙïKzî³ ïFÏî ìîÚïB$î ì î$«ï>Ùî@Yï4jî ìî¤îØîâî‘î!rî#øî)ï1eîSî÷î4Vî>%ï/¿î¿ï,ºî ìî¤îØîâî‘îíî ›î"Iî#øî%¦î'Tî)î*°î,^î. î/»ï+îØî?îíï)nîØ îíî ›ï'ÈîØîhî î(+ î1iî3îï&#îØ îîÄï$}îØî?îíï"×îØî"Iî#øï�î ìî{ïÛîSî]îî"I{ï6îâî î î$fî*€xï�îâïêî]{îâî¢î«î"_î%_î'¼xïDîâîíïŸîhî# ï ùîíî#øî%¦î)Ùî,^î3îî:§î@‰îCåï Sî'Tî)Ùî,^î3îî:§î@‰îCåï ­î{î{îhî#î‡î!î"‘xî(P !}ø`m$xïQËî*ïP%î$]ïM î]îÎîºïKzîìî-«î3�ïFÏî]îIïE*î+=î0zïB$î*îî‡î [î#€ï@î*áî02î63î9Xï>Ùî-Gï=3î(¿ } \`m$JÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿGridFunctionsThisexpressiondisplaysapopupmenuwithtwoitems,and,andwaitsfortheusertoselectone.Ifisselected,iscalled.Ifisselected,iscalled.Ifneitheroftheseisselected,theformreturns.Thepurposeofthisexampleistoshowsomegoodpracticestofollowwhenusingmenus.First,themenuisonlycreatedonce,andsavedinthevariable.Thisismoreecientifthemenuisusedmorethanonce.Second,alloftheinformationaboutthemenuiskeptinoneplace,whichmakesiteasytounderstandandedit.Third,theformsevaluatedasaresultofselectingsomethingfromthemenuarepartofthecodeandhencewillbeknowntomasterscope(asopposedtothesituationiftheformswerestoredaspartoftheitems).Fourth,theitemsinthemenuhavehelpstringsfortheuser.Finally,thecodeiscommented(alwaysworththetrouble).19.15GRIDFUNCTIONSAGridisapartitioningofanarbitrarycoordinatesystem(hereafterreferredtoasthe``sourcesystem'')intorectangles.ThissubsectiondescribesfunctionsthatoperateonGrids.ItincludesfunctionstodrawtheoutlineofaGrid,totranslatebetweenpositionsinasourcesystemandGridcoordinates(thecoordinatesoftherectanglewhichcontainsagivenposition),andtoshadeGridrectangles.AGridisdenedbyits``unitgrid'',aregion(calledaGridSpec)whichistheoriginrectangleoftheGridintermsofthesourcesystem.ItsistheX-coordinateoftheleftedgeoftheoriginrectangle,itsistheY-coordinateofthebottomedgeoftheoriginrectangle,itsisthewidthofthegridrectangles,anditsistheheightofthegridrectangles.[Function]Outlinesthegriddenedbywhichisrectangleswideandrectangleshighon.Eachboxinthegridhasaborderwithinitthatispointsoneachside;sotheresultinglinesinthegridare2*thick.Ifistheatom,insteadofaborderthelowerleftpointofeachgridrectanglewillbeturnedon.Ifisnon-,itshouldbeatextureandtheborderlineswillbedrawninthatshade.[Function]Shadesthegridrectangle(,)ofwithtextureusingon.isinterpretedthesameasfor.ThefollowingtwofunctionsmapfromtheX,YcoordinatesofthesourcesystemintotheGridX,Ycoordinates:[Function]ReturnstheGridX-coordinate(intheGridspeciedby)thatcontainsthesourcesystemX-coordinate.[Function]ReturnstheGridY-coordinate(intheGridspeciedby)thatcontainsthesourcesystemY-coordinate.19.42(B-SELECTED(*ifBisselected)(DOBTHING))(PROGN(*userselectedoutsidethemenu)NIL)))ABADOATHINGBDOBTHINGNILFOOMENULEFTBOTTOMWIDTHHEIGHT(GRID)POINTNIL(SHADEGRIDBOX)GRID(GRIDXCOORD)(GRIDYCOORD)GRIDSPECUNITSWIDEUNITSHIGHGRIDBORDERDISPLAYSTREAMGRIDSHADEGRIDSPECUNITSWIDEUNITSHIGHDISPLAYSTREAMGRIDBORDERGRIDBORDERGRIDBORDERGRIDSHADEXYSHADEOPERATIONGRIDSPECGRIDBORDERDISPLAYSTREAMXYGRIDSPECSHADEOPERATIONDISPLAYSTREAMGRIDBORDERXCOORDGRIDSPECGRIDSPECXCOORDYCOORDGRIDSPECGRIDSPECYCOORD|ïb'î%"î(NxïW–î ìî î®îÝîîÊî×î"±î%Æî(lî-¿î1Hî2 î4Òî8Iî:�î<Ûî?ÎîAxîE1îH\ïUðî Vî Ïî®î'îËî"Åî$?î1î2—î7;î8Êî=ˆî?OîBäîD]ïTJî ìî Iî­îáïQEî ìî ±îÞî…îîvîÐîlî!áî%`î(¿î.Oî/ìî4î7°î;Fî@%îC³îFïOŸî ìî Pîbî!î¸îgî(îÏî!'î,4î- î0î1€î5 î:,î;†î=ÝîAµîCîFMïMùî ìî îîKîHîî{ î$ î'ùî*eî.Rî/Ëî2òî4­î7eî;`î?yîC¼îE îH0ïLTî ì î&îôî�îÕîKî"Lî(‰î*Nî+�î/pî1@î6îî=£îA îC•îGŒïJ®î ìî Òî�îóî<î÷îðîŸî”î$î%Î î-ƒî/®î5(î6Ûî9>î>Ùî@?îB¢îF�ïIî ìîîØîÊî’îÿîÓî ãî#Qî'î(Äî+2î/ î2sî5œî:î»îBfîG€ïGbî ìî 0îšî îâîÖî!3|ï@?î ìîiî“xï;Úî ìî ƒîèî^î“ î îÏîÊî"v î)@î- î4î9\î;î<Íî?6îD=ï:4î ìî þ î•îé îÏî$ïî+%î..î3Qî5’î:«î<^îAúîH0ï8�î ìî hîÒî‚îFî{î=îöî"‚î'øî-Æî/î0µî5 î9‘îî=î>ÂîAîDnîFï3�î ìî ¡î üîEî?îî}î Øî"Y î)î*Êî-%î/•î2×î4Œî6çî:â îAîHsï1øî ìî <î ¼ îmîîhî î Vî"î$Qî(B î.fî4Ýî6:î8‹î<\î>î@WîC* ï0Rî ìî ¡îîsîÐîî¾î î"ü ï-MîC5 ï+§î¦î9îªî"žî'˜î0Uî4sî=W îCÆîG(ï*î½ î% î(%î44î5î8jî;î<¶î? îAßîDGîEfï([î¦îÙî!îßî)Ýî-ïî/æî3î6Lî8î:Qî?ãîCîD­îFýï&¶î¦îéî#éî'Øî1êî3Gî5•î=5î>îB¢îDKîEfï%î¦î*îî ±î$sî&Rî)¦î,­î2«î5{î7‘î<$î? îHsï#jî¦îëîÆîî#“î%‚î&«î+Nî.î0`î4Øî8î:¸î<§î@ÜîB‰îETï eîC5 ï¿î¦î6î€î!Lî'î(`î)�î*yî2¤î5¨î>�ïî¦î#¿î-Iî.´ î5Àî8î;—î=CîBÛïî ìî óî1î î6îî#î%¤î(À î04î2î4¬î9)î=Ñî@ØîCgîFòïoî ì ïiîC5 ïÄî¦îáîFî"¨î$) î*ïî-î/‚î2ãî8Œî@¦îA«îDïî¦îîOî"Æî$G î0=ïîC5 ï sî¦îáîGî"¨î$( î*îî-î/�î2ãî8Œî@¦îA«îDï Íî¦îîOî"Æî$F î0Eïî(!ÿÿ}`m$æxï\Aî{î{îhî#îˆî! î"†xî(F ïZ›î{{î]î îìî ßî%oî'¹xî,2ïW–î,hî0qïUðî ìîbî![î)ÑïTJî\ïOŸî&Sï3�î6îBæï1øî02ï0Rîyï-Mî ìî@ï&¶î9ï#jîfï eî ì î@ïî?~ïiî ì î 1ïî ì î 9!ÿÿ}¼`m$vxï-Mîöîîî�î% î.%î2Tî9ï+§î)¥î5ñï*î¦î*î.Nï([î!< ï&¶îI î)J ï%î@Çï eî¯îgîîóî"î%ýî,õ î6î:/ï¿î'ˆî(¸î,î:8îB/îFMïî«îÙî$š ïiîîÐîïÄî:Žïî+î+Õïîî!ï sî:Žï Íî+!ÿ}Ä `m$|ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIESThefollowingtwofunctionsmapfromtheGridX,YcoordinatesintotheX,Ycoordinatesofthesourcesystem:[Function]ReturnsthesourcesystemX-coordinateoftheleftedgeofaGridrectangleatGridX-coordinate(intheGridspeciedby).[Function]ReturnsthesourcesystemY-coordinateofthebottomedgeofaGridrectangleatGridY-coordinate(intheGridspeciedby).19.16COLORGRAPHICSThecolorboardsontheXerox1100andtheXerox1132dierindesign.TheXerox1100boardsupports4bitsperpixelcolor.TheXerox1132supports4or8bitsperpixel.Alloftheuser'scodeshouldbewritteninhigherlevelmachineindependentfunctions.Bothcolorboardsproduceanimagethatis640pixelswideby480pixelshigh.Theimagecanbethoughtofasapaint-by-numberpaintingwherethenumberofapixelisitsvalue.Thenumberofbitsperpixel(4ontheXerox1100,4or8ontheXerox1132)determinesthenumberofdierencecolorsthatcanbedisplayedatonetime.Whenthereare4bpp,16colorscanbedisplayedatonce.Whenthereare8bpp,256colorscanbedisplayedatonce.Amappingtablecalleda``colormap''determineswhatcoloractuallyappearsforeachpixelvalue.Acolormapgivesthecolorintermsofhowmuchofthethreeprimarycolors(red,greenandblue)displayedonthescreenforeachpossiblepixelvalue.Inthefollowingsections,thenotionsof``colormap'',and``color''aredescribed.19.16.1ColorBitmapsA``colorbitmap''isactuallyjustabitmapthatallowsmorethanonebitperpixel.Totestwhetherabitmapisa``colorbitmap'',usethefollowingform:Colorbitmapsarecreatedbycalling(page19.4)withaargumentofanythingotherthan1or.Currently,anyvalueofexcept1,4,8or(defaultsto1)willcauseanerror.A4bitperpixelcolorscreenbitmapusesapproximately76kofstorage.Thereisonlyonesuchbitmap.Thefollowingfunctionprovidesaccesstoit:[Function]Returnsthecolorbitmapthatisbeingorwillbedisplayedonthecolordisplay.Thiswillbeifthecolordisplayhasneverbeenturnedon(see,page19.47).19.43(LEFTOFGRIDCOORD)(BOTTOMOFGRIDCOORD)Note:ThissectiondescribestheInterlisp-Dfacilitiesforusingacolordisplay.TousethesefacilitiesyouneedtohaveaXerox1100orXerox1132withacolordisplayattached,andyoumustloadintheLispUserslesCOLOR.DCOMandLLCOLOR.DCOM(automaticallyloadedbyCOLOR.DCOM).(NEQ(fetch(BITMAPBITMAPBITSPERPIXEL)of)1)BITMAPCREATENILNIL(COLORSCREENBITMAP)NILCOLORDISPLAYGRIDXGRIDSPECGRIDXGRIDSPECGRIDYGRIDSPECGRIDYGRIDSPECXXBITSPERPIXELBITSPERPIXEL|ïb'îŒ î%”î'*î-Ñ xï\:î ìî ÆîØî†î„î î" î$kî'Éî*¹ î2î4Úî7<î:, îAsîC/îE’ïZ”î ìïW�îC5 ïUéî¦îÄî î#Cî'¥î)% î/Îî1qî3¹î6î9Eî:èî;ûî??îEîF„ïTDî¦î' î$Eî&jî(Çî,!î1Âî9ÔïQ>îC5 ïO™î¦î×î2î#{î'ïî)o î0+î1àî4;î8þî­îAÆîE±îG€ï+çî ìî }îºîÃîîèî ¨î$Dî*iî,yî.âî3"î5iî8£î=ëîA[îE§îG€ï*Aî ìîøîlîÊî¤î[î"…î&¤î)Yî.2î0„ |ï%Üî ìîiî<xï!xî ìî �îÒîIîÌîöî®îïî$·î'›î+Ýî/…î2Áî5ƒî7·î:Bî>sî@±îCSîH´ïÒî ìîöîaîŠî´îjîÝî!;î'GïÇî ìî ÷îZîÚîÏîøî,Qî0=î3Ïî7îAÒîH&ï"î ìî¡îGîtî²îîé î#ˆî&0î)áî4áî97î:ÏîþîA¨îD×ïÑî ìî ÁîÎîCîÍî!×î#„ïÌîC5 ï &î¦î´îìî"@î&Êî)pî*µî.Wî/ôî2xî4Aî:5î<î>LîA¡îFÆï €î¦îbîî ñî#aî&íî+®î.3î2 î5yî9øî<îIï Úî¦îêïî("ÿÿÿ}ô`m$^xïW�î ìî#ïQ>î ìî$¶{ïBkî ìî Øî÷î…î7î“ î"ëî$“ î)úî,1î/×î1î4’î9Ìî;øî>hîAâ îGHï@Åî ìî îšî±î×îÞîî¾îÅî"úî%æî' î*cî.Öî4‡î7î9¢î<Ýî?ÅîA\îC˜ï?î ìxî ¥ {î�xî1 {î"Ê î+žî/Ýxî1¶ {xïÍî ìîîîºî+‡î.äî0“ïÇî!ˆ ï"îî?rïÌî ìï €îcî>ì ÿÿÿ}ôt`m$¢xïW�î4î8îðïTDîåî"éî3¼ïQ>îâîæîžïMóî#>î&Bî7ïÒî›ïÍî. ïÇî8o ï"î+£ !ÿÿ}hP`m$:ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿColorSpecications[Variable]Aglobalvariablesettoathatcoverstheentirecolordisplayscreen.Currentlythisis.[Variable]Thewidthofthecolordisplay.Currently640.[Variable]Theheightofthecolordisplay.Currently480.19.16.2ColorSpecicationsAcolormapmapsacolornumber(from0to2-1)intotheintensitiesofthethreecolorguns(red,greenandblue).Eachentryinthecolormaphas8bitsforeachoftheprimarycolorsallowing256levelsperprimaryor224possiblecolors(notallofwhicharedistincttothehumaneye).WithinInterlisp-Dprograms,colorscanbemanipulatedasnumbers,red-green-bluetriples,names,orhue-lightness-saturationtriples.Anyfunctionthattakesacolorwillacceptanyofthedierentspecications.Ifanumberisgiven,itwillbethecolornumberusedintheoperation.Itmustbevalidforthecolorbitmapusedintheoperation.(Sincealloftheroutinesthatuseacolorneedtodetermineitsnumber,itisfastesttousenumbersforcolors.describedbelowprovidesawaytotranslateintonumbersfromtheotherrepresentations.)Ared-green-blue(RGB)tripleisalistofthreenumbersbetween0and255.TherstelementgivestheintensityforRED,thesecondforGREENandthethirdforBLUE.WhenanRGBtripleisused,thecurrentcolormapissearchedtondthecolorwiththecorrectintensities.Ifnoneisfound,anerrorisgenerated.(Thatis,noattemptismadebythesystemtoassigncolornumberstointensitiesautomatically.)ExampleofanRGBtripleis(255255255)whichgivesthecolorwhite.Therecordwithelds,,andisprovidedtomanipulateRGBtriples.Acolornameisanatomthatisontheassociation-list.Theofthecolorname'sentrywillbeusedasthecolorcorrespondingtothecolorname.Thiscanbeanyoftheotherrepresentations.(Note:Itcanevenbeanothercolorname.Loopsinthenamespacesuchaswouldbecausedbyputtingandonarecheckedforbythesystem.)Severalcolornamesareavailableintheinitialsystemandareintendedtoallowcolorprogramswrittenbydierentuserstocoexist.Theseare:19.44WHOLECOLORDISPLAYREGION(CREATEREGION00640480)COLORSCREENWIDTHCOLORSCREENHEIGHTCOLORNUMBERPRGBREDGREENBLUECOLORNAMESCDR'(RED.CRIMSON)'(CRIMSON.RED)COLORNAMESnotBITSPERPIXEL|ïb'î#¡î's xï\:îC™ ïZ”î¦îjîÂî#,î%€î'eî.Žî1’î6î8–î<·î@jîEPïXïî¦îàî î7ÂïUéîC™ ïTDî¦î|îZî î"oî%éî+î1TïQ>îC™ ïO™î¦î|î²î iî"Çî&Aî+rî1¬|ïK4î ìîiî< xïFÏî ìî �îîLîþî=îÎî î#ÿî%Iî' î0lî0åî2¨î5”î8 î>…î@SîBÆîFcïE*î ìî cîçîâîÊîzî î#âî%Âî(Sî,î/Lî1óî3Zî6-î8œî;þî=éî@zîEßïCOî ìî­î„îŽîDî¹î ¿ïC¸î!nïCOî#•î)î-Wî0†î2·î4²î9î;•î@¨îB™îE9ïA©î ìî eî îrîîyî#wî&î'ï î/×î1„î7‡î9ïî=«î@ÃîEEï@î ìî õîŸ î4 îÖî Xî#Ÿî)[î,mî0.î1žî5^î8Nî<Ìî?±îA¯îDSï>]î ì ï;Xî ìî ~î ¸îñîmîŒîòî¬î­î î#§î(àî,+î-éî0X î73î8»î<1î>2îA§îCôîFcï9²î ìî©îñî¬î îìî!%î#"î$èî'Tî,«î/†î2î3?î6Çî:0î;ëîBvîD^ï8 î ìî Cî °îÞî�îî±îîî,î2;î6Fî;Óî<þî?ÖîA…îGï6gî ìî—îûîYîôï3bî ìî šîî¾îùîªîtîî Nî"­î$‡î(1î-ÿî3Œî4äî7¼î;<î>5îAîFnï1¼î ìî ^îþîNîLî¾îaî!±î'jî*4î,¦î0!î2qî73î;]î=`îAîDÌîFLï0î ìî rî`îîDîØî¢î!xî$wî&ýî*¡î-âî0hî5 î<„î>-îAÆîCYîGîï.qî ìî �î îMî0î"îMî#{î% î(îî+î-’î20î4î82î;ÒîA¤îCw ï,Ëî ìîWîîÇî·î Sî#ûî%gî(tî+ î.î2"î5’î7ðî;lî?°îB‡ï+%î ìî î%î4îî¥î!î&Üî(ˆ î/ªî3Eï( î ìî uîíî§îîýîuî?î§îªî" î(Ùî3yî4Sî:.î;ãî>?îA·îFLï&zî ìî ˜îŠîÇîvî×îT î"Fî#öî&Wî)Ôî.î18î3Åî5·î8Yî:î«îC îEï#/îîî(²î3»î8‡î=Ýî@%îB,îD–ï!‰î ìîÆîKî–îóî³î kî"Ôî&Çî+Iî. î0fî6(î7àî;‘î?îE.ïãî ìî æîpîëî˜îžîœïî(ÿÿ}ì`m$Pxï\:î ìïZ”î(ÇïXïî!ê î-­î/[î1 î4fïUéî ìïQ>î ìï8 î!w ï,ËîFÔï+%îŸîîÄï( î+ î7&ï#/î ìîöî¤î°î#î$Åî*à {î6 ÿÿÿ}ì `m$NxïG9î'¼ }Œ `m$ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIESnameRGBnumberindefaultcolormap01234567Ahue-lightness-saturationtripleisalistofthreenumbers.Therstnumber(hue)isbetween0and355andindicatesapositionindegreesonacolorwheel(blueat0,redat120andgreenat240).Thesecond(lightness)isabetween0and1whichindicateshowmuchtotalintensityisinthecolor.Thethird(saturation)isabetween0and1whichindicateshowdisparatethethreeprimarylevelsare.Therecordwithelds,,andisprovidedtomanipulateHLStriples.Example:thecolorblueisrepresentedinHLSnotationby(0.51.0).[Function]Returnsthecolornumber(osetintothescreencolormap)of.shouldbeeither(1)apositivenumberlessthanthemaximumnumberofcolors,(2)acolorname,(3)anRGBtriple,or(4)anHLStriple.Ifisoneoftheaboveandisfoundinthescreencolormap,itscolornumberinthescreencolormapisreturned.Ifnot,anerrorisgeneratedunlessisnon-,inwhichcaseisreturned.[Function]ReturnsifisanRGBtriple;otherwise.[Function]ReturnsifisanHLStriple;otherwise.19.16.3ColorMapsThescreencolormapholdstheinformationaboutwhatcolorisdisplayedonthecolorscreenforeachpixelvalueinthecolorscreenbitmap.Thevaluesinthecurrentscreencolormapmaybechangedandthischangewillbereectedinthecolorsbeingdisplayedatthenextverticalretrace(approximately1/30ofasecond).Changingthecolormapcanbeusedtogetdramaticeects.[Function]Createsacolormapforascreenthathasbitsperpixel.Ifis,thenumberofbitsperpixelistakenfromthecurrentcolordisplaysetting.speciestheinitialcolorsthatshouldbeinthemap.Ifisnot,itshouldbealistofcolorspecications19.45BLACK(000)BLUE(00255)GREEN(02550)CYAN(0255255)RED(25500)MAGENTA(2550255)YELLOW(2552550)WHITE(255255255)FLOATPFLOATPHLSHUELIGHTNESSSATURATION(COLORNUMBERP)NILNIL(RGBP)NIL(HLSP)NIL(COLORMAPCREATE)NILNILCOLORBITSPERPIXELNOERRFLGCOLORCOLORCOLORNOERRFLGXXXXXXINTENSITIESBITSPERPIXELBITSPERPIXELBITSPERPIXELINTENSITIESINTENSITIES|ïb'îŒ î%”î'*î-Ñ xï[yî ìï[*îÀî5”î:»î î ìî œîBîfîžîFî1î!1î"Uî%Êî)¸î-Dî.×î0^î2Ìî4_î6íî9�î=_î>ñîBîEOï²î@nîBÛîGï:Áî ìî d îÄîAîî"šî#áî&¨î'ïî, î1Êî4ßî:Éî=9î@ÒîFï9î ìî îõîzîªî ãî)fî*Zî6)î7«î=�î?T îFŽï7vî ìî™îÈî%îŸî·î" î&…î(1î+�î0êî2äî4‘î6ï4qîC5 ï2Ëî¦îýîî#î(iî,·î/±î22î6Œî:*î=ßîD ï1%î¦î*î%î"î$Kî%€î*�î/Ñî2pî5Ÿî8 î>�îCÄîE‡ï/î¦îÊîñîiî"{î$Ÿî&Œî*%î."î/âî2î3óî7@î;jîAºîC#îEÊîG€ï-Úî¦îºî…î î$%î%çî(Zî,¦î3&î5î8¥î=âî?¥îBîFcï,4î¦îØî]î"Åî$`î'Lî)Uî,Þî.cî4Âî@qîAöîG:îH0ï*Žî¦î°î!¥î#ï'‰îC5 ï%ãî¦î5î ðî"Zî$Iî'äî/ ï"ÞîC5 ï!8î¦î5î ðî"Zî$Iî'™î.Á |ïÓî ìîiî<xïoî ìî Ñîî¡îÉîŠîø î%‹î)yî,äî0nî1èî8î:&î<”î@îDdîF¯ïÉî ìî Tîÿî°îî�îÉî" î$ãî)î*Âî-$î1íî6'î9¥î<Áî?ÇîAºîG(ï#î ìî „î"îÄî­î2îØî/î#'î&èî,ûî.Œî0ãî3éî8²î=. îFšï~î ìî £î ÌîVî�îíîgî!~î$î%öî)/î*Üî-#î2ÎïxîC5 ïÓî¦îâîaî"2î% î(1î)±î.=î1_î=²î@¨îCqîH\ï -î!î%:î&Nî(ãî.Bî02î3 î5´î9Pî:òî>çîBƒîEï ‡î¦îTî 6î-óî3…î6î:2î>cîAbîFîH0ï áî¦î1îUî(:î)Òî.øî0î1„î6)î8Fî9œî<î=ëîA’ ïî(!ÿÿ}À`m$òxïX+î ìîÀî"Eî#óïU3î ìïU&îÀî"Eî#óïR!î ìîÀî"Eî%¢ïOî ìîÀî"Eî%¢ïL$î ìïLîÀî#óî%¢ïIî ìîÀî#óî%¢ïF î ìîÀî#óî'PïCî ìïCîÀî#óî'Pïêï'‰îöï%ãîÙî”ï"Þîöï!8îÙî”ïxî] î ïÓî4( ï -î¦ ï ‡î%¶ ï áî  ÿÿÿ}ˆ|`m$TÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿColorMaps(otherthancolornumbers),e.g.thelistofRGBtriplesreturnedbythefunction(below).Ifis,thedefaultisthevalueof(ifis4)or(ifis8).[Function]Returnsifitisacolormapthathasbitsperpixel;otherwise.Ifis,itreturnsifitiseithera4bitsperpixeloran8bitsperpixelcolormap.[Function]Returnsalistoftheintensitylevelsof(defaultis)inaformacceptedby.Thislistcanbewrittenonleandthusprovidesawayofsavingcolormapspecications.[Function]Ifisacolormap,itreturnsacolormapthatcontainsthesamecolorintensitiesas;otherwiseitreturnsacolormapwithdefaultcolorvalues.[Function]Readsandsetsthecolormapthatisusedbythecolordisplay.Ifisnon-,itshouldbeacolormapandsetsthesystemcolormaptobethatcolormap.Returnsthepreviousvalueofthescreencolormap.Ifis,thecurrentscreencolormapisreturnedwithoutchange.[Function]Returnsacolormapwhichisdierentshadesofoneormoreoftheprimarycolors.Forexample,givesacolormapofdierentshadesofgray;givesdierentshadesofred.Thefollowingfunctionsareprovidedtoaccessandchangetheintensitylevelsinacolormap.[Function]Setstheprimaryintensitiesofcolornumberinthecolormaptotheonesspeciedby.canbeeitheranRGBtriple,anHLStripleoracolorname.Returns.[Function]Setsandreadstheintensityleveloftheprimarycolor(either,or)forthecolornumberinthecolormap.Ifisanumberbetween0and255,itisset.Thepreviousvalueoftheintensityofisreturned.[Function]Addstotheintensityoftheprimarycolor(either,or)foreverycolornumberin.[Function]Rotatesasequenceofcolorsin.Therotationmovestheintensityvaluesofcolornumberintocolornumber+1,theintensityvaluesofcolornumber+1intocolornumber+2,etc.and'svaluesinto.19.46INTENSITIESFROMCOLORMAPNIL\DEFAULTCOLORINTENSITIES\DEFAULT8BITCOLORINTENSITIES(COLORMAPP)NILNIL(INTENSITIESFROMCOLORMAP)(SCREENCOLORMAP)COLORMAPCREATE(COLORMAPCOPY)(SCREENCOLORMAP)NILSCREENCOLORMAPNIL(MAPOFACOLOR)(MAPOFACOLOR'(REDGREENBLUE))(MAPOFACOLOR'RED)(SETCOLORINTENSITY)NIL(COLORLEVEL)REDGREENBLUE(ADJUSTCOLORMAP)REDGREENBLUE(ROTATECOLORMAP)INTENSITIESBITSPERPIXELBITSPERPIXELCOLORMAP?BITSPERPIXELCOLORMAP?BITSPERPIXELBITSPERPIXELCOLORMAP?COLORMAPCOLORMAPCOLORMAPBITSPERPIXELCOLORMAPCOLORMAPNEWCOLORMAPNEWCOLORMAPNEWCOLORMAPPRIMARIESCOLORMAPCOLORNUMBERCOLORSPECCOLORNUMBERCOLORMAPCOLORSPECCOLORSPECCOLORMAPCOLORNUMBERPRIMARYCOLORNEWLEVELPRIMARYCOLORCOLORNUMBERCOLORMAPNEWLEVELPRIMARYCOLORPRIMARYCOLORDELTACOLORMAPDELTAPRIMARYCOLORCOLORMAPCOLORMAPSTARTCOLORTHRUCOLORCOLORMAPSTARTCOLORSTARTCOLORSTARTCOLORSTARTCOLORTHRUCOLORSTARTCOLOR|ïb'î&î)åxï\:î¦î-îÁî#­î*·î.¿î1Žî4;î6dî:qî? îEîG€ïZ”î¦î1�î7ôîBîFVîG€ïXïî¦îFî­î î#©î:îE îFrîHïWIî/±î:½î<'ïTDîC5 ïRžî¦î%î&–î(î)žî*ëî.Šî1Æî4¶î@¥îCiîFïPøîº î!‚î,Lî0Gî1.î2Žî?Bî@­îB îC‚îGvîH©ïORî¦îEî¸î î!ßî#Íî%î' î*î-wïLMîC5 ïJ§î¦î­îªî¹î!Eî#vî$žî&xî(Ôî,oî5Jî:;îHëïIî¦îEî`î¶îõî#Iî0ùî1Æî4Ïî6ýî9xî;Yî=ªî?ùîAðîD4îFÚïG\î¦î0îYî!.î"æî$¾î'î*”î-¬ ïDWîC5 ïB±î¦î ´î"'î#Yî&Ûî*Vî+³î0kî1œî5î8?î;î@zîBàîFcïA î¦ îîî&uî'Sî-Yî.�î3 î4+î7‡î:€î=zîBîE\ï>îC5 ï<`î¦î¾îkî!î#Vî&Èî)Øî,œî-þî1/î3!î5vî8èî>ï:ºî¦îîGîî ]î$Çî&¨î'Ãî+/î.9î=î?ªîAúîFcï9î¦î¾îkîZî!&î$ î(;î-nî/Ìî5Vî8üî:´î=îAGîDÁîH\ï7oî!ôî%äî&¿î)î-âî2î5‘î8¨î:î?¨îD¯ï4jîC5 ï2Äî¦îîmî"î%jî)ªî+Jî1 î5¡î7�î:nîîîBJîC_îFÅï/xî¦îYîàî#=î$ðî8î;|îAîE`îGï,sî ìî ÁîÎîÆîî äî"‘î&šî)Oî-óî0Pî5Úî9¡î;Mîžî@�îCîFÅï&#îEî!î#–î&æî,ªî6#î?$îAÐîCâîGîï$}î¦îAî@î!.î$~î($î)çî+î.‰î2Éî:�ï!xîC5 ïÒî¦î½î§î!wî$ î)Éî-Aî/.î1Áî7(îE{ï,î,î î%dî&�î(õî+î/&î>»î@•îCîFÅï†îžîwî(Dî)¬î*Òî/÷î5^î6�î9Aî<)î=|î>ãîA€îDSïáî¦îMîîaî$ìî1î2}ïÛîC5 ï6î¦î÷î!Ëî$Pî*î+ßî.cî3¼îAóîIï�î^î!|î"yî$´î(eî+ßî1î9«ï‹îC5 ïåî¦î|î‰î#Pî$ìî(Ïî1Xî2î4Òî9Þî>î@DîE³ï?î¦îpîüî+î-èî1tî>áîAãîDSï ™î¦îËî}î ñî.Gî0Ôî3¤î7îDnîGTï ôî¦î"î#rî'œî2¥ïî(ÿÿ}`m$BxïZ”îiîCÑïXïî%\ïWIî¦ïTDî ì î$&ïPøî¦î-ÂïLMî ìî%åïJ§î;yïIî%5 ïDWî ì î&7ï>î ìî!'ï:ºîÂî0à ï7oî#^ï4jî ì î…ï1î$r î/^î4iî9sï/xî(r î3_ï)nî ìî3†ï$}î7üï!xî ì î7ãï,î¦î4î"ïÛî ìî-äï6îF|ï�î¦î ï‹î ìî0ÿÿ}\`m$„xïZ”î9 ïXïî;Û ïWIî1‰ ïTDî*î©îv ïRžîýî|î7M ïPøî# î7Gî9ÆïLMîíî!lïJ§î-úî0yïDWî¯î.î‡ ïB±î0î®ïA î|î!ûï>î]î/î®ï<`î?�îBaîDàï7oî¦îxî÷ï4jîØï)nîâîaî!»î$:î,+î.ªï'Èî4Sî6Òï&#î¦î%î.Èî1Fî7!î9 ï!xîî€îÙîXî&Iî+ î.dî1ïÒî:×î?›îBòï,î4zî6ùï†î¦î%î õïáî&£î+gî.¾ïÛî]î!îxî"(î$vî%5î&ìî)kï6îiî¶îuî7]î¶î@*îEÉîG€ïS»î¦ïP¶î¦îÅî#,î%Úî(1î+¥î-Rî0Mî1±î4î6_î9Oî:³î>î?ØîBÞîF1îGTïOî¦î€î4îÀî"2î#‘î%Áî+5î-²î18î3iî6ïMkî¦îiînîxî#˜î&Wî(î+î,Zî.ùî0Óî3Éî6÷î;Nî=î@_îB-îD îF¥ïKÅî¦ïHÀî¦îˆîŒîî%`î'¨î*î/Qî1î2Kî5Ñî:Œî?ÀîAyîCuîGÙïGî¦îîâî ²î$‹î*î-Cî2…î6Êî9Dî=î>ÙîA“îCfîEßïEtî¦înîyî!¸î$¨î(>î-€î/Sî1Ìî5aî9Cî=Šî?î@×îCPîGjïCÏî¦î£îvîïî$ìî'eî*wî,ä î3Ôî6Åî:/î=Ñî@ãîCêîFcïB)î¦ îî ;î"“î&î+>î/6î0èî3?î7þî;rîAîCêîFWï@ƒî¦î’îsîÅî#aî%î'aî+¬î/ î5"î7Ì î>_ îEßï>Ýî¦î_îÚî»î%î' î. î0[î4wî6î8²î:[î<«î?”îB;îG€ï=8îŸî Øî%î+rî/øî1{î5¸î8.î;ìî=¼î@ îG4ï;’î¦î*î›î9î$Šî&Uî(Æî-®î1Öî8;î<¼î>:îCòîFcï9ìî¦îòî ûî#Õî'Rî+î/Lî0ºî6(î8&î=|îEoï8Fî¦îaîÈî!ûî#oî%%î'Œî,zî.;î0¡î3kî91î—îC¶îFcï+¥î¦î’î$ƒî'šî*Cî-éî/ùî1"î5‚î=bî?|ï'@î ìîiî¦îîÔîÃî" î$¾xï"Ûî ìî ·î(îÌîLî1î”î�î":î$Ôî(ßî+2î.£î3Gî4¨î6üî9Pî>®îAÞîDîFcï!6î ìîºîîßîjîìî!Óî$¨î%ñ î,Žî1µî3� î:Uî=˜îAîC@îE¾ï�î ìî ¨îîKîøî~îÛîUï‹îC5 ïåî¦îÙî6î#ûî'uî*�î+ìî.Iî1Ãî6qî7Üî:YîCïàîC5 ï:î¦î µî$®î%“î&òî*�î,¤î/ î2Žî7Üî@ëîB^îG£îHˆï”î¦îîîeî"Ñî'q î6¸î9Jî;¯î?‘îHsïïî¦îÌîCî°î!î"iî%Ÿî'Iî)£î-Õî1Lî4æîBUîC½îIïIî¦î•îLî©î Hî!õî$Rî'Ìî,î.Sî0nî2ïDî¦î#îRî!Úî%~î*Wî/Ê î6#î9î=ûîAíîDuï žî¦îýîôî#kî&î)Öî.Íî3Lî8Eî;Cî=êîB«îFnï øî¦îùîVî"Ðî'î)™î,çî/†ïî(!ÿÿ}°`m$\xï[øî ì î%ïP¶î )ïOî8²ï=8î¦î'zï;’î4Gï9ìî?Ýï+¥îî9‚ï‹î ìïåî@}ïàî ì î2ˆï:î")îEïïîF|!ÿÿ}°l`m$Bxï[øî¯î]îýî<ïZRî2•î3CïP¶î î_ïàî¯î.î‡ î' î1 ï:î0î¯î9eî;äï”î-’ îAîCƒïïî6c î@ì!ÿ} h`m$DÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿPrintingandDrawinginColor19.16.5PrintingandDrawinginColorThecurrentcolorimplementationallowsdisplaystreamstooperateoncolorbitmaps.Thefollowingtwofunctionssetthecolorinwhichadisplaystreamprintsordraws:[Function]Setstheforegroundcolorofadisplaystream.Returnsthepreviousforegroundcolor.Ifis,itreturnsthecurrentforegroundcolorwithoutchanginganything.Thedefaultforegroundcoloris7,whichiswhiteinthedefaultcolormap.[Function]Setsthebackgroundcolorofadisplaystream.Returnsthepreviousbackgroundcolor.Ifis,itreturnsthecurrentbackgroundcolorwithoutchanginganything.Thedefaultbackgroundcoloris0whichisblackinthedefaultcolormap.,thelineandcurvedrawingroutinesandtheprintingroutinesknowhowtooperateonadisplaystreamthathasacolorbitmapasitsdestination.Followingaresomenotesaboutthem.(page19.4)Wheningfromacolorbitmapontoanothercolorbitmapwiththesamebitsperpixel,theoperations,andaredoneonabitlevel;notonapixellevel.Thuspaintingcolor3ontocolor10willresultincolor11.Wheningfromablackandwhitebitmapontoacolorbitmap,the1bitswillappearintheandthe0bitsin.Currently,istheonlyoperationthatissupportedingfromblackandwhitetocolor.Thisoperationisfairlyexpensive;ifthesamebitmapisgoingtobeputupseveraltimesinthesamecoloritisfastertocreateacolorcopythenbltthecolorcopy.Iftheisandtheisacolorbitmap,theargumentistakentobeacolor.Thus,tollanareawiththecolor,do:Curvedrawing(page19.14)Forthefunctions,and,thenotionofabrushhasbeenextendedtoincludeacolor.Abrushcanbealistoftheform.Abrushcanalsobeabitmap,whichcanbecolorbitmap.Linedrawing(page19.13)Thelinedrawingfunctionshavebeenextendedtotakeanotherargumentwhichisthecolorthelineistoappearinifthedestinationofthedisplaystreamisacolorbitmap.Iftheargumentis,theofthedisplaystreamisused.PrintingPrintingonlyworks(currently)inmode.Thecharacterswillhaveaforegroundcolorofandabackgroundof.Thersttimeacharacterisprintedinanewcolor,thecolorimagescorrespondingtothe19.48(DSPCOLOR)NIL(DSPBACKCOLOR)NILBITBLTBITBLTBITBLTPAINTINVERTERASEBITBLTDSPCOLORDSPBACKCOLORREPLACEBITBLTTEXTUREBLUE(BITBLTNILNILNIL5075100200'TEXTURE'REPLACE'BLUE)DRAWCIRCLEDRAWELLIPSEDRAWCURVE()NILDSPCOLORREPLACEDSPCOLORDSPBACKCOLORCOLORDISPLAYSTREAMCOLORCOLORDISPLAYSTREAMCOLORSOURCETYPEDESTINATIONBITMAPTEXTURECOLORBITMAPSHAPESIZECOLORCOLOR|ïb'î uî%Æî(dî-áî/‚ï\:î ìîiî»îXîÖîwxïWÕî ìî Àîƒîü îÐî"øî'¥î,“î.?î3#î5&î8Ÿî>TîA(îG3ïV0î ìîäîÿî]î×îƒî�î¶î#dî'Ñî+¹î-|ïS*îC5 ïQ…î¦î¨î& î$fî(î)Ùî+"î/ñî5Aî:”î=îB¼ ïOßî¦î¾î"$î&î'î(^î-î/|î4J î;sî>öîDïN9î¦î(î!î%Ø î-î0ªî20î3Þî8î9Šî=bî?*îA£îFcïL“î¦ïIŽîC5 ïGèî¦î˜î î$œî('î)ðî+*î/éî5 î:Oî<¾îBY ïFCî¦î¨î"î%ñî&Ïî(%î,Öî/5î3û î;�î>ýîDïD�î¦î+î!î%Þ î-î1î2�î3íî8î9œî=_î?(îA¢îFcïB÷î¦ï?òîöîÆîîÀîiîî Uî%’î(;î*Œî/½î4úî8©î;Ÿî=@îBîDîE/ï>Lî ìîXî#î–î¿î9îèî”î m î'ðî.kî0¼î4Lî7çî;Åï;Gîzî6î¦î Õî#@î&´î'ìî+uî04î3qî8‡î<î@ÏîCöîFcï9¡î¦î>î©î ^î"´ î-‡î3âî;?î=ˆî@ðîBíîDîF!ï7üî¦îîîFî ªî$pî'êî-Iî0Ãî1öî5#î8�î:�î=)î@ñîB�îFï4öî¦î ÿî#•î'3î(–î,vî/eî3\î8Eî;¬î=î@ÃîFîH©ï3Qî¦î\îî!µî#yî-@î0 î2€î3Ëî6�îBYîCK ï1«îüîWî!¤î$¬î*Àî-|î.Öî:Cî<�î?äîC{îF ï0î¦îXîfî ‚î&¬î(î+» î2�î3æî6Hî9Èî>|î?ìîC¸îEjîG^ï._î¦îÉîiî""î#áî&Rî)Þî-kî.Óî0Qî4 î5àî9ñî;-î>ºîBîERîG€ï,ºî¦î ï)´î¦î/î$Cî,$î.áî>±î@#îATîDÖï(î¦î _î&„î'ïî+­î-Zî/Jî0tî4tî8Gî9õî<î=õî@ìîDîFcï&iîîßï¹î ìî îRîïî¦îbîÒî+Dî6î@^îAMîC½îH&ïmî¦îÞîÊîLî"´î(¥î*aî/Jî0�î4ªî6Dî:1î<Èî>Æî?ýîBGîD îFyïÇî%½î&¾î(8î,î.|î14î3î4)î9!î=î?‘îAnîD×ïÂî ìî #îkî'ïî¦îuî"î"bî(Tî+�î.ãî4¾î6dî9Sî>SîDpîHsïwî¦îîîÝî"’î#þî%«î*/î+Üî-=î/› î6œî8Tî:²î?aîCÎîE9îFcïÑî¦îîªî&î,<î0@î10î:òî<¾î?0îCòîHsï+î¦ï &î ìî¦îî aî$� î+„î3óî8Óî;Ö îBlîECîH´ï €î¦ îáî"vî+Ÿî.nî/± î7PîC7îD-îGï Úî¦îØîî"î#~î(]î*î+Rî.Mî22î4Ÿî8)î<Å îEÃîG€ïî(!ÿÿ}X`m$¢xïS*î ìî!—ïOßî#—ïIŽî ì î$óïFCî#lï?òî ìï;Gî ìîÊï9¡î)Tî.[î6�ï4öîôï3Qî%íî8D ï1«î¦î59ï)´î%¶ï&iî¦ï#dî¦î_î!»î%î2Fî4Ëî7Pî:­î> îE™ï!¾î¦ïî"Ý î,2 î8ÏïÇî¦î$æïÑî-»î3¡ï &î-_ï €î$Hî9" ÿÿ}Xè`m$zxïS*îSîÒî‚î±ïOßîGîÆïIŽî¯î.îßî ïFCî+îªï)´î”îÛî1Fî6n ï(îï#dî(tî*óïÇî}î8î —î#ïÑî!î#›!ÿÿÿ}@p`m$NÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿINTERLISP-DDISPLAYFACILITIEScurrentfontarecalculatedandcached.Thustherstcharactermaytakeawhiletoappearbutsucceedingcharactersprintquickly.19.16.6UsingtheCursorontheColorScreenThecursorcanbemovedtothecolorscreen.Whileonthecolorscreen,thecursorisplacedusingmode,thuswithsomecolormapsitmaybehardtosee.Itisautomaticallytakendownwheneveranoperationisperformedthatchangesanybitsonthecolorscreen.Whilethecursorisonthecolorscreen,theblackandwhitecursoriscleared.[Function]mustbeeitherthevalueoforthevalueof.movesthecursorontothespeciedscreen.Thevaluereturnedisthescreenbitmapthatthecursorwasonbeforewascalled.19.16.7MiscellaneousColorFunctionsThefollowingfunctionsprovidesomecommonoperationsoncolorbitmapsanddisplaystreams.[Function]Fillstheregioninwiththecolor,usingtheoperation.[Function]Fillsanareainthecolorbitmapwithacolor.[Function]Createsandreturnsacolorbitmapcopyingtheblackandwhitebitmap.Thereturnedcolorbitmapwillhavecolornumberinthosepixelsofthatwere1andinthosepixelsofthatwere0.Thisprovidesawayofproducingacolorbitmapfromablackandwhitebitmap.Note:thisisafairlyexpensiveoperationintermsofbothtimeandspace.19.16.8Demonstrationprograms[Function]Bringsupamenuofcolordemonstrationprograms.Thesystemwillcyclethroughtheentriesonthemenuautomatically,allowingeachtorunforasmallxedamountoftime(typically40seconds).Selectingoneoftheentriesinthemenuwillcauseittostartthatprogram.[Function]RunstheInterlisp-Dlogodemonstrationuntilabuttonispressedthenadds19.49XOR(CHANGECURSORSCREEN)(COLORSCREENBITMAP)(SCREENBITMAP)CHANGECURSORSCREENCHANGECURSORSCREEN(COLORFILL)(COLORFILLAREA)(COLORIZEBITMAP)Thefollowingfunctionsprovidesomedemonstrationsofthecolordisplay.TheseareavailableintheLispusersleCOLORDEMO.DCOM.(COLORDEMO)(COLORDEMO1)SCREENBITMAPSCREENBITMAPREGIONCOLORNUMBERCOLORBITMAPOPERATIONREGIONCOLORBITMAPCOLORNUMBEROPERATIONLEFTBOTTOMWIDTHHEIGHTCOLORNUMBERCOLORBITMAPOPERATIONBITMAP0COLOR1COLORBITSPERPIXELBITMAP1COLORBITMAP0COLORBITMAP|ïb'îŒ î%”î'*î-Ñ xï\8î¦îxîpî!Í î(Aî+î09î3Áî6*î8÷î>æîAôîD÷îF,ïZ’î¦îSîÖî U î'? î-¦î1 |ïV-î ìîiî[î¸î:î2î�î"axïQÉî ìî Äîòî~îpîöî¦îî!„î&Fî*]î,eî.Åî2Cî6Ôî95î=bî>ÐîC*ïP#î ìî7îTî‡î1îÆî|î ìî$î&î)eî+,î.Qî/áî1f î9ìî=ÃîA¥îGîïN}î ìîîjîîãî î"˜î%/î'+î)€î,òî1§î5³î8î<*î=�î?‰îAÞîEPïLØî ìî Iîðî¥îbîŒî÷ïIÒîC5 ïH-î!üî%«î'ãî,î.½î2®îEsîG€ïF‡î¦îOî(Ìî9�î=Ãî@#îDPîG€ïDáî¦îZî"Lî%5î(îî.—î0î2…î6Îî;�î>nî@ßîEîGÙïC;î¦î+•î.>|ï>×î ìîi î`î2xï:rî ìî ÁîÎîÆîÌî!\î' î-®î/²î3,î8_î;î?Âï7mîC5 ï5Çî¦î×îOî'î2rî5¥î8îEAîF7ï4!î¦îî'Rï/°îC5 ï. î¦î½î«î¢î!Nî#¬î'&î+Õî.íî0ï+îC5 ï)_î¦îœîbî$!î%[î(æî-¦î2Þî5Lî9î;Éî?—îIï'¹î¦î·î ˆî$=î)&î, î/‰î3>î>Dî@,îDîH&ï&îÿîõî#mî$Êî-<î/î2Øî6êî>$îAîD‘îFÆï$nî¦î$î@î! î"´î)/î*Lî-¹î2\î5³î6Ðî:jî=î@ÃîEñï"Èî¦îEî°îØî sî&·î,Ûî.ˆî2Oî4î7@î:bî=|ïcî ìîi î¸xïTîC5 ï®î¦îåîéîî"×î$‚î'ð î0éî7uî:>î>©îAFîDªïî¦î@îèî!(î#Áî'Û î0éî6£î: î;öî>ÅîA=îB¡îFxïbî¦îÇî˜î!Ô î'æî)äî0?î60î8óî:Åî=<îAÂîCˆîFï½î¦îOîîVî!î$î&Üï ·îC5 ï î¦î–îG î#°î%¦î) î2_î5÷î7sî<5î=óîC-îF¤ïî("ÿÿ}°`m$¨xïQÉîFÔïIÒî ìî$AïH-î4¯ïF‡î î)ÛïC;îñï7mî ì î4Kï1Uî ì îF©ï+î ìî1"{ïÿî ìî Žî=îèîxî¿ î(Üî*_î,Šî/Ðî4Êî8Šî:½î@>îAÄîCïïYî ìxî ! {xïTî ì ï ·î ì !ÿ}°`m$dxïIÒîº ïH-î¦ ï7mî*îÖîUî#Fî%Åî-!î1?ï5Çî!¨î(Úî+Yî;±î>0ï4!î (î$Fï1Uî†î“î Äî%ºî+4î-³î5¤î8#î?îC�ï+î]îèîüî"­î%Âî(r ï)_îDWï'¹î8 î;µï&î¦î'©î*½î8Ë!}ÀÔ`m$jÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿDemonstrationprograms.Thebuttonwillbringupamenuthatallowschangingthespeedofrotationoredittingthecolormap.Thebuttonwillrotatethecolormapinthekineticarea.[Function]Putsupatestpatternofsize,thenrotatesthecolormap.ThespeedofrotationofthecolormapisdeterminedbytheYpositionofthecursor.Thebuttonwillbringupamenuthatallowseditingofthecolormaporchangingthecolormaptoamapofdierentshadesofonecolor.[Function]Runscolorkineticinaregionofthecolordisplayusingcolorsthrough.[Function]Drawsaseriesofconcentricrectanglesofincreasingsizeinincreasingcolornumbers.determinesthesizeoftherectangles.Thiscanthenbe``run''bycallingdescribedbelow.[Function]Drawsaseriesofconcentricrectanglesofsizeinincreasingcolornumbers.determineswhetherthecolornumbersincreaseordecrease.Thiscanthenbe``run''bycallingdescribedbelow.[Function]Drawsaseriesofconcentriccirclesonthecolorscreeninincreasingcolornumbers.Thecircleswillbeofsize.Thiscanthenbe``run''bycallingdescribedbelow.[Function]Displaysapatternofcolorsonthecolordisplay.Thisisusefulwheneditingacolormap.Thepatternhassquaresofthe16possiblecolorslayedoutintworowsatthetopofthescreen.Colors0through7inthetoprow.Colors8through15inthenextrow.Thebottompartofthescreenisthenlayeredwithbarsofwidthwiththeconsecutivecolornumbers.Thepatternisdesignedsothateverycolorhasaborderwitheveryothercolor(unlessistoolargetoallowroomforeverycolor-about20).[Function]Goesintoaninnitelooprotatingthescreencolormap.Thecolorsbetween(default0)and(defaultmaximumcolor)arerotated.Ifisgiven,iscalledeachtimethecolormapischanged.Thisprovidesaneasywayof``animating''screenimages.[Function]RunsaversionofthePolygonsprogramonthecolorscreen.19.50COLORKINETICMIDDLELEFT(COLORDEMO2)MIDDLE(COLORKINETIC)(TUNNEL)ROTATEIT(MINESHAFT)ROTATEIT(WELL)ROTATEIT(SHOWCOLORTESTPATTERN)(ROTATEIT)(DISMISS)Note:ThefollowingfunctionisavailableintheLispusersleCOLORPOLYGONS.DCOM.(COLORPOLYDEMO)SIZESIZEREGIONFIRSTCOLORLASTCOLORREGIONFIRSTCOLORLASTCOLORSPEEDSPEEDNOUTFLGNOUTFLGNNBARSIZEBARSIZEBARSIZEBEGINCOLORENDCOLORWAITBEGINCOLORENDCOLORWAITWAITCOLORDS|ïb'î"B î+�xï\:î!»î"�î+ î/€î2/î5Üî7òî9!î=î?ÖîDïZ”î¦îîûîÀî$ôî&Ãî+×î.Aî1Èî5Šîî%¼î(…î*]î,Û î4î7Rî9ûî=?î?NîCbîE|ïA îãî%ï>îC5 ï<`î¦î1î™î!•î#Œ î*^ î0ùî2ðî7…î9q î@!îCÛï:ºî î$î)7î+~î.âî4xî9žî;KîAFîDGîFºï9î¦î•î‰î‚î+ î1Eï6îC5 ï4jî¦îÜîïî •î"7 î(´î,Éî.¸î1î4dî8„î: î@vîCÛï2Äî¦î[îeî îî"¼î$Sî'Äî(î+uî-Þî0áî2¯î6‚î8[îC¸ï1î¦ï.îC5 ï,sî¦îPî™î#sî%Jî)hî+Œî. î1£î74î:lî;öî@*îCüîH´ï*Îî¦îî«î!uî&#î(Šî-cî/î1`î37î8hîî3Úî6'î8Šî;Çî@îA:îF]îH0ï'‚î¦îîî Wî#.î'óî*Õî,Žî.ìî3"î4Žî7²î<‚î?›îB’ï%Üî¦î—îÁî!0 î(�î,î2�î5iî:5î;²îAzîCNîF,ï$7î¦îGîàî/î#Ìî' î*âî.¤î2Dî<»î>Lî@ÚîDdîF7ï"‘î¦îLî‡î!8î$²î%¯î)�ïŒîC5 ïæî¦înî|î ¢î%‰î(ãî.8î0Íî5;î8íî=0î@>îDsï@î Aî%cî'î1-î6Oî<Ïî@ÆîCîH\ïšî[îãî-,î.³î2Äî6î9Oî;Éî?`îB”îDïõî¦î½î Gî"6î%7î( î)Ä î1‰î5¾ïêîC5 ïDî¦îBîkî!.î"åî%Cî+î0¢î2¦î5î8~ïî(ÿÿ}d`m$ xï\:î¦ î%xïZ”î8lïUéî ì îˆïRžîDOïLMî ì î+ˆïEüî ìîxïA î¦ï>î ì îøï9î#ãï6î ìîßï2Äî<œï.î ìî!vïŒî ìî&ïšî!î+´{ïïî ìî µîuîDîŠîôî"”î$8î&‚î,pxî.¦{xïêî ì îS ÿ}dè`m$pxïUéîïTDî(ÎïLMî¯î[î!kî$î)·ïJ§î)\îAyîGˆïIîÙî"uïEüî¤ïB±î¦ï>î*îòîï<`î5Ùï:ºî¦îÄï6îöï2Äî&Üï.îhï'‚îDKï$7î7ïŒîSî”îEî Kî"üî#ýï@î¦îèî)Íî.Ôïšî¦î§î( î)¡ïêî†îÿÿ}L `m$|ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ TIMESROMANþ¡GACHAþ¡CMSîþç  TIMESROMANþ¡  TIMESROMANþ¡ CMSYêþ¡ Ð š ° Ä( ä2N9 C �N ŠX Va dj 4s ê~ ¼‰ ’ Hœ z¥ ¶® t¸ ú fË lÔ :ß 6ê ^ó "ü � &  ¢! Ø+ ²5=jDÈJ äS ˜^ h 0qâyd 4‰ h’„šœ¢ f¬ Z¶ <¿¾ÇÏj/Ò3Ðÿÿ›�Í»ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ chapwp.PRESSSANNELLASEPTEMBER 15, 1983 13:25:31