DIRECTORY
Icons USING [IconFlavor, NewIconFromFile],
Imager USING [ConstantColor, Context],
InputFocus USING [SetInputFocus],
MessageWindow USING [Append],
Graph USING [BackgroundIndex, CaretIndex, ColorIndex, GraphColors, GraphColorsArray, GraphFonts, GraphFontsArray, GraphHandle, GraphProc, OutputType, PaintInfo, ROPE, ValueList, Viewer],
GraphCarets USING [GetFocus, Init, SetFocus],
GraphCleanUp USING [CleanUpHandle],
GraphOps USING [Lock, Unlock],
GraphPrivate USING [ChartMenus, Draw, EraseSelEntity, EraseSelText, JumpDownAnyCurve, JumpLeftAnyCurve, JumpLeftSameCurve, JumpRightAnyCurve, JumpRightSameCurve, JumpUpAnyCurve, MoveSelText, MoveXhair2To1, PaintAll, RemoveAllCurves, RotateSelTextCCW, RotateSelTextCW, SelectPoint, SelectEntity, SelectText, ShowSelEntityOnSpec, ShowSelTextOnSpec, SlideLeftNSteps, SlideOnSameCurve, SlideRightNSteps, SwitchAuto, SwitchCaretBlinking, SwitchCaretVisibility, SwitchGrid, SwitchTarget, UserEditAllowed, Wait, ZoomIn, ZoomOut, ZoomPoint],
GraphUtil USING [HandleFromViewer, HandleNotNil, SetCursorForBackgroundIndex, UseDefaultColors, UseMyColors, UseMyFonts],
Process USING [Abort],
Rope USING [Cat, Equal],
TIPUser USING [InstantiateNewTIPTable, TIPScreenCoords],
UserProfile USING [CallWhenProfileChanges, ProfileChangedProc, Token],
ViewerClasses USING [Column, NotifyProc, PaintProc, PaintRectangle, Viewer, ViewerClass, ViewerClassRec], 
ViewerEvents USING [EventProc, RegisterEventProc],
ViewerOps USING [CreateViewer, EnumerateViewers, EnumProc, OpenIcon, PaintViewer, RegisterViewerClass, SwapIconAndViewer, TopViewer],
WindowManager USING [colorDisplayOn];

GraphViewer: CEDAR PROGRAM
IMPORTS Icons, InputFocus, MessageWindow, GraphCarets, GraphCleanUp, GraphOps, GraphPrivate, GraphUtil, Process, Rope, TIPUser, UserProfile, ViewerEvents, ViewerOps, WindowManager
EXPORTS GraphPrivate = { OPEN Graph, GraphOps, GraphPrivate, GraphUtil;

graphIcon: Icons.IconFlavor _ Icons.NewIconFromFile["Graph.icons", 0];
graphViewerClass: ViewerClasses.ViewerClass _ NEW [ViewerClasses.ViewerClassRec _
[paint: GraphPaint,
icon: graphIcon,
cursor: textPointer,
tipTable: TIPUser.InstantiateNewTIPTable["Graph.TIP"],
notify: GraphNotify
]];
initialColumn: ViewerClasses.Column; -- {static, left, right, color}
createOption: {closeOtherViewers, swapLastViewer, iconic, badCreateOption};
backgroundIndex: BackgroundIndex; -- {white, gray, darkGray, black, unknown}

defaultColors: PUBLIC GraphColors _ NEW[GraphColorsArray _ [
[R: 1.0,  G: 1.0,  B: 1.0], -- 0, white, reserved for color cursor, foreground or background.
[R: 1.0,  G: 0.0,  B: 0.8], -- 1, purple red
[R: 0.4,  G: 0.0,  B: 1.0], -- 2, purple
[R: 0.0,  G: 0.0,  B: 1.0], -- 3, blue
[R: 0.0,  G: 0.56, B: 1.0], -- 4, greenish blue
[R: 0.0,  G: 1.0,  B: 1.0], -- 5, green blue
[R: 0.0,  G: 1.0,  B: 0.0], -- 6, green
[R: 0.52, G: 1.0,  B: 0.0], -- 7, yellow green
[R: 1.0,  G: 1.0,  B: 0.0], -- 8, yellow
[R: 1.0,  G: 0.60, B: 0.0], -- 9, orange yellow
[R: 1.0,  G: 0.42, B: 0.0], -- 10, yellowish orange
[R: 1.0,  G: 0.25, B: 0.0], -- 11, orange
[R: 1.0,  G: 0.0,  B: 0.0], -- 12, red
[R: 0.5,  G: 0.5,  B: 0.5], -- 13, gray, reserved for background. (default target color.)
[R: 0.17, G: 0.17, B: 0.17], -- 14, dark gray, reserved for background.
[R: 0.0,  G: 0.0,  B: 0.0]  -- 15, black, reserved for color cursor, foreground or background.
]];

defaultFonts: PUBLIC GraphFonts _ NEW[GraphFontsArray _ [
["TimesRoman", FALSE, FALSE, 10, 11.0], -- 0, TimesRoman10, reserved.
["TimesRoman", FALSE, FALSE, 8, 9.0], -- 1, TimesRoman8, reserved.
["TimesRoman", TRUE, FALSE, 12, 13.0], -- 2, 12b, reserved.
["TimesRoman", FALSE, TRUE, 10, 11.0], -- 3, ~10i
["TimesRoman", TRUE, FALSE, 10, 11.0], -- 4, ~10b

["Helvetica", FALSE, FALSE, 8, 9.0], -- 5, Helvetica8
["Helvetica", FALSE, FALSE, 6, 7.0], -- 6, ~6
["Helvetica", TRUE, FALSE, 14, 15.0], -- 7, ~14b

["Gacha", FALSE, FALSE, 8, 9.0], -- 8, Gacha8
["Hippo", FALSE, FALSE, 8, 9.0], -- 9, Hippo8
["Logo", FALSE, FALSE, 12, 14.0], -- 10, Logo12
["Math", FALSE, FALSE, 8, 9.0] -- 11, Math8, reserved.
]];

systemColor: PUBLIC ARRAY ColorIndex OF Imager.ConstantColor;


ShowChart: PUBLIC GraphProc = {
IF HandleNotNil[handle] THEN { OPEN handle;
viewer: Viewer _ chart.viewer;
IF viewer = NIL THEN {
UseMyColors[handle];
UseMyFonts[handle];
NewChartViewer[handle];
}
ELSE {
IF viewer.iconic THEN ViewerOps.OpenIcon[icon: viewer, bottom: FALSE]
ELSE ViewerOps.TopViewer[viewer];
};
};
}; -- ShowChart

NewChartViewer: GraphProc = { OPEN handle;
viewer: Viewer _ chart.viewer _ ViewerOps.CreateViewer[
flavor: $Graph,
info: [
class: graphViewerClass,
name: graph.fileName,
menu: ChartMenus[],
column: initialColumn,
iconic: TRUE,
data: handle],
paint: TRUE];

SELECT createOption FROM
iconic => {
};
closeOtherViewers => ViewerOps.OpenIcon[icon: viewer,
closeOthers: TRUE, bottom: TRUE, paint: TRUE];
swapLastViewer => {
vLast: Viewer _ NIL;
LastViewer: ViewerOps.EnumProc = {
IF v.column = initialColumn AND NOT v.iconic THEN {vLast _ v; RETURN[FALSE]};
}; -- LastViewer
ViewerOps.EnumerateViewers[LastViewer];

IF vLast = NIL THEN ViewerOps.OpenIcon[icon: viewer,
closeOthers: TRUE, bottom: TRUE, paint: TRUE]
ELSE {
ViewerOps.SwapIconAndViewer[icon: viewer,
openViewer: vLast, paint: TRUE]; -- this paints the new viewer only.
ViewerOps.PaintViewer[vLast, all, TRUE, NIL]; -- paint the last viewer.
};
};
ENDCASE;
}; -- NewChartViewer


IsGraphViewer: PUBLIC PROC [viewer: Viewer] RETURNS [BOOL] = {
IF viewer = NIL THEN RETURN[FALSE];
RETURN[viewer.class.flavor = $Graph];
}; -- IsGraphViewer

GraphPaint: ViewerClasses.PaintProc = {
IF IsGraphViewer[self] AND context # NIL AND NOT self.iconic THEN {
handle: GraphHandle _ HandleFromViewer[self];
IF handle # NIL THEN { OPEN handle;
IF clear THEN paintInfo.clear _ FALSE;
IF whatChanged # NIL AND ISTYPE[whatChanged, PaintInfo] THEN {
paintInfo.output _ screen;
Draw[context, handle];
}
ELSE {
paintInfo.output _ screen;
paintInfo.action _ paint;
FOR i: CaretIndex IN CaretIndex DO
chart.caretState[i].visible _ FALSE;
ENDLOOP;
IF whatChanged = NIL THEN paintInfo.item _ all
ELSE IF ISTYPE[whatChanged, ViewerClasses.PaintRectangle] THEN {
vr: ViewerClasses.PaintRectangle _ NARROW[whatChanged];
paintInfo.item _ rectangle;
paintInfo.rect _ [vr.x, vr.y, vr.w, vr.h];
};
Draw[context, handle];
IF whatChanged = NIL THEN mergingBounds _ FALSE;
};
}; -- handle # nil
};
}; -- GraphPaint

GraphBeforeDestroy: ViewerEvents.EventProc = {
handle: GraphHandle _ HandleFromViewer[viewer];
IF handle # NIL AND event=destroy AND IsGraphViewer[viewer] AND before THEN {
Lock[handle];
IF GraphCarets.GetFocus[] = handle THEN GraphCarets.SetFocus[NIL];
IF handle.selectProc # NIL THEN {
TRUSTED {Process.Abort[handle.selectProc]};
Unlock[handle];
UNTIL handle.selectProc = NIL DO Wait[]; ENDLOOP;
Lock[handle];
};
handle.chart.viewer _ NIL;
Unlock[handle];
};
}; -- GraphBeforeDestroy

GraphAfterDestroy: ViewerEvents.EventProc = {
handle: GraphHandle _ HandleFromViewer[viewer];
IF handle # NIL AND event=destroy AND IsGraphViewer[viewer] AND NOT before THEN {
Lock[handle];
IF handle.controller = NIL THEN handle _ GraphCleanUp.CleanUpHandle[handle, TRUE]
ELSE Unlock[handle];
};
}; -- GraphAfterDestroy

GraphNotify: ViewerClasses.NotifyProc= {
IF IsGraphViewer[self] AND NOT self.iconic THEN {
handle: GraphHandle _ HandleFromViewer[self];
IF HandleNotNil[handle] THEN {
mx, my: INTEGER;
nArg: INT;
FOR params: LIST OF REF ANY _ input, params.rest UNTIL params = NIL DO
Lock[handle];
WITH params.first SELECT FROM
xy: TIPUser.TIPScreenCoords => {
mx _ xy.mouseX;
my _ xy.mouseY;
};
n: REF LONG INTEGER => nArg _ n^;
a: ATOM => {
SELECT a FROM
$SetFocus => InputFocus.SetInputFocus[handle.chart.viewer];
$SelectText => SelectText[handle, mx, my];
$Slide => SlideOnSameCurve[handle, mx, my];
$SelectCurve => SelectEntity[handle, mx, my];
$SelectPoint => SelectPoint[handle, mx, my];
$ZoomPoint => ZoomPoint[handle, mx, my];
$ShowSelTextOnSpec => ShowSelTextOnSpec[handle];
$ShowSelEntityOnSpec => ShowSelEntityOnSpec[handle];
$JumpLeftSameCurve => JumpLeftSameCurve[handle];
$JumpLeftAnyCurve => JumpLeftAnyCurve[handle];
$JumpUp => JumpUpAnyCurve[handle];
$ZoomIn => ZoomIn[handle, mx, my];
$LeftStep => SlideLeftNSteps[handle, nArg];
$RemoveCurve => IF UserEditAllowed[handle] THEN EraseSelEntity[handle];
$RemoveAllCurves => IF UserEditAllowed[handle] THEN RemoveAllCurves[handle];
$JumpRightSameCurve => JumpRightSameCurve[handle];
$JumpRightAnyCurve => JumpRightAnyCurve[handle];
$ClearText => EraseSelText[handle];
$RotateSelTextCW => RotateSelTextCW[handle, nArg];
$RotateSelTextCCW => RotateSelTextCCW[handle, nArg];
$MoveSelText => MoveSelText[handle, mx, my];
$JumpDown => JumpDownAnyCurve[handle];
$ZoomOut => ZoomOut[handle, mx, my];
$RightStep => SlideRightNSteps[handle, nArg];
$PrimaryVisibility, $SecondaryVisibility, $TextCaretVisibility =>
SwitchCaretVisibility[handle, SELECT a FROM
$PrimaryVisibility => primary, $SecondaryVisibility => secondary,
ENDCASE => text
];
$PrimaryBlinking, $SecondaryBlinking, $TextCaretBlinking =>
SwitchCaretBlinking[handle, SELECT a FROM
$PrimaryBlinking => primary, $SecondaryBlinking => secondary,
ENDCASE => text
];
$SaveCrosshair => MoveXhair2To1[handle];
$ToggleAutoBounds => SwitchAuto[handle, bounds];
$ToggleAutoDiv => SwitchAuto[handle, divisions];
$ToggleTargetX, $ToggleTargetY => 
SwitchTarget[handle, IF a = $ToggleTargetX THEN x ELSE y];
$ToggleGridX, $ToggleGridY =>
SwitchGrid[handle, IF a = $ToggleGridX THEN x ELSE y];
$CleanAndPaint => PaintAll[handle, TRUE];
$Repaint => PaintAll[handle, FALSE];
ENDCASE;
};
ENDCASE;
Unlock[handle];
ENDLOOP;
};
};
}; -- GraphNotify

ProcessUserProfile: PUBLIC UserProfile.ProfileChangedProc = {
rope: ROPE _ UserProfile.Token[key: "Graph.Column", default: "color"];
initialColumn _ SELECT TRUE FROM
rope.Equal["color", FALSE] => color,
rope.Equal["left", FALSE] => left,
rope.Equal["right", FALSE] => right,
ENDCASE => static;
IF initialColumn = static THEN {
MessageWindow.Append[
Rope.Cat["Warning: Illegal entry in user profile, Graph.Column: ", rope, "."],
TRUE];
initialColumn _ color;
};
IF initialColumn = color AND NOT WindowManager.colorDisplayOn THEN initialColumn _ left;

rope _ UserProfile.Token[key: "Graph.CreateOption", default: "closeOtherViewers"];
createOption _ SELECT TRUE FROM
rope.Equal["closeOtherViewers", FALSE] => closeOtherViewers,
rope.Equal["swapLastViewer", FALSE] => swapLastViewer,
rope.Equal["iconic", FALSE] => iconic,
ENDCASE => badCreateOption;
IF createOption = badCreateOption THEN {
MessageWindow.Append[
Rope.Cat["Warning: Illegal entry in user profile, Graph.CreateOption: ", rope, "."],
TRUE];
createOption _ closeOtherViewers;
};

rope _ UserProfile.Token[key: "Graph.Background", default: "white"];
backgroundIndex _ SELECT TRUE FROM
rope.Equal["white", FALSE] => white,
rope.Equal["gray", FALSE] => gray,
rope.Equal["darkGray", FALSE] => darkGray,
rope.Equal["black", FALSE] => black,
ENDCASE => unknown;
IF backgroundIndex = unknown THEN {
MessageWindow.Append[
Rope.Cat["Warning: Illegal entry in user profile, Graph.Background: ", rope, "."],
TRUE];
backgroundIndex _ white;
};

IF reason = firstTime THEN UseDefaultColors[];
SetCursorForBackgroundIndex[backgroundIndex];
}; -- ProcessUserProfile

Init: PROC [] = {
ViewerOps.RegisterViewerClass[$Graph, graphViewerClass];
[] _ ViewerEvents.RegisterEventProc[proc: GraphBeforeDestroy, event: destroy, before: TRUE];
[] _ ViewerEvents.RegisterEventProc[proc: GraphAfterDestroy, event: destroy, before: FALSE];
ProcessUserProfile[firstTime];
UserProfile.CallWhenProfileChanges[ProcessUserProfile];
GraphCarets.Init[];
}; -- Init

Init[];
}.

CHANGE LOG.
SChen, October 19, 1985 10:09:23 pm PDT, created.
	*File: GraphViewer.mesa, Copyright (C) 1985 by Xerox Corporation.  All rights reserved.
Last Edited by:
Sweetsun Chen, November 21, 1985 10:56:25 pm PST

FS USING [ExpandName, GetDefaultWDir],
(constant) variables
destroy: GraphDestroy

parameters initialized or updated by ProcessUserProfile
entity colors: all vivid
gray or black
[family, bold, italic, vFontSize, pFontScale]
public procedures
if graph viewer already exists, then pop it up to the top;
else create the viewer for the graph on the handle.
Supposed to be locked before this is called.
This proc will unlock handle before paintproc is to be invoked. No more, 11/13/85.
waitingGraph _ TRUE;
WHILE waitingGraph DO Wait[]; ENDLOOP;
Unlock[handle];
inhibitDestroy: inhibitDestroy,
Unlock[handle];
ViewerOps.PaintViewer[viewer, all, TRUE, NIL];
waitingGraph _ FALSE;
AddEntity: PUBLIC PROC [viewer: Viewer _ NIL, entity: Entity _ NIL] = {
IF vector = NIL OR NOT IsGraphViewer[viewer] THEN RETURN ELSE {
shouldPaint: BOOL _ FALSE;
expectedSize: CARDINAL;
handle: GraphHandle _ NARROW[viewer.data];
IF handle # NIL THEN {
Lock[handle];
expectedSize _ handle.graphSpec.nCurvesMax + 1;
IF vector.size # expectedSize THEN MessageWindow.Append[
IO.PutFR["Only %g elements in vector when %g expected.",
IO.int[vector.size], IO.int[expectedSize]], TRUE]
ELSE {
IF handle.curves = NIL THEN {
handle.lineStates _ NEW[StateSequence[handle.graphSpec.nCurvesMax]];
Note: lineStates[n] is the state of curve # n+1.
FOR i: CARDINAL IN[0..handle.graphSpec.nCurvesMax) DO
handle.lineStates[i] _ NEW[LineStateRec _ []];
ENDLOOP;
}
ELSE IF handle.curves.first # NIL THEN shouldPaint _ TRUE;
handle.curves _ CONS[vector, handle.curves]
};
Unlock[handle];
};
IF shouldPaint THEN ViewerOps.PaintViewer[viewer, client, FALSE, handle.curves];
};
}; -- AddEntity
other private procedures
[self: Viewer, context: Imager.Context, whatChanged: REF ANY, clear: BOOL]
there is no checking of the viewer class in Draw.
Lock[handle];
waitingGraph _ FALSE;
Unlock[handle];
GraphOpen: ViewerEvents.EventProc = {
handle: GraphHandle _ HandleFromViewer[viewer];
IF handle # NIL AND event = open AND IsGraphViewer[viewer] AND NOT before THEN
handle.graphOpened _ TRUE;
}; -- GraphOpen

initialColumn
createOption
backgroundType
colors
[] _ ViewerEvents.RegisterEventProc[proc: GraphOpen, event: open, before: FALSE];
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