<> <> <> <> DIRECTORY Atom USING [PutPropOnList], CD, CDBasics, CDDraw, CDProperties, CDValue, CDVArrow, CDVPrivate, CDVScale, CDVFurtherPainters, Graphics, Process, ViewerEvents; CDVArrowImpl: CEDAR MONITOR IMPORTS CDDraw, CDBasics, CDProperties, CDValue, CDVPrivate, CDVScale, CDVFurtherPainters, Graphics, Process, ViewerEvents EXPORTS CDVArrow = BEGIN <<>> <<-- implements arrows on chipndale viewers>> <<>> <<-- we have to distribute the command to the separate viewers because >> <<-- arrows have different sizes in design coordinates, depending on scale >> <<-- of the viewer.>> <<>> <<-- we do store the arrow position twice!>> <<-- 1: on a per design basis (using CDValue); this is used to reeinstall arrows >> <<-- when viewers are opened>> <<-- 2: on a per viewer basis (in the PainterRec); this allows erasing the arrows>> <<-- however we need a flag in the PainterRec if it is valid ($on) >> ShowArrow: PUBLIC PROC [design: CD.Design, pos: CD.DesignPosition] = <<--called from client>> BEGIN CDValue.Store[boundTo: design, key: $arrow, value: NEW[CD.DesignPosition_pos]]; CDDraw.InsertCommandAll[design, CDDraw.Comm[cmd: ref, erase: FALSE, rect: [pos.x, pos.y, 0, 0], ref: $PutArrowXXX]] END; RemoveArrow: PUBLIC PROC[design: CD.Design] = <<--called from client>> BEGIN CDValue.Store[boundTo: design, key: $arrow, value: NIL]; CDDraw.InsertCommandAll[design, CDDraw.Comm[cmd: ref, erase: FALSE, rect: [0, 0, 0, 0], ref: $RemoveArrowXXX]] END; GetAPainterRec: ENTRY PROC [me: CDVPrivate.MyGraphicRef] RETURNS [pr: REF CDVPrivate.PainterRec] = BEGIN ENABLE UNWIND => NULL; x: REF = CDProperties.GetPropFromList[me.properties, $CDxArrowPaintProc]; IF x#NIL THEN pr _ NARROW[x] ELSE { pr _ NEW[CDVPrivate.PainterRec_[proc: PaintArrow]]; me.properties _ Atom.PutPropOnList[me.properties, $CDxArrowPaintProc, pr] } END; PaintArrow: CDVPrivate.PainterProc = <<-- PROC [me: MyGraphicRef, paintRef: REF PainterRec, interrestRect: CD.DesignRect];>> BEGIN vp: CD.Position _ CDVScale.DesignToViewerPosition[me.scale, [paintRef.rect.x1, paintRef.rect.y1]]; vp _ CDBasics.AddPoints[vp, [1, 1]]; me.viewContext.SetColor[Graphics.black]; []_ Graphics.SetPaintMode[me.viewContext, opaque]; me.viewContext.SetCP[vp.x+10, vp.y]; me.viewContext.DrawTo[vp.x, vp.y]; me.viewContext.DrawTo[vp.x, vp.y+10]; me.viewContext.SetCP[vp.x, vp.y]; me.viewContext.DrawTo[vp.x+18, vp.y+18]; END; PaintTheArrow: CDVFurtherPainters.FurtherPaintProc = <<--PROC [me: CDVPrivate.MyGraphicRef, key: REF]>> <<--eg. former paints ticks>> <<--called through ProtectedRepaint only>> <<--called in viewers paint proc>> BEGIN pr: REF CDVPrivate.PainterRec = GetAPainterRec[me]; comm: REF CDDraw.Comm = NARROW[key]; arrowSize: CD.DesignNumber = MAX[CDVScale.UngriddedViewerToDesignScalar[me.scale, 20], 1]; aRect: CD.DesignRect _ [x1: comm.rect.x1, y1: comm.rect.y1, x2: comm.rect.x1+arrowSize, y2: comm.rect.y1+arrowSize]; IF pr.data = $on THEN { oldRect: CD.DesignRect; IF pr.rect=aRect THEN RETURN; oldRect _ pr.rect; pr.rect _ aRect; CDDraw.InsertCommand[me.ct, CDDraw.Comm[cmd: rect, erase: TRUE, rect: oldRect, ref: NIL]]; } ELSE { pr.rect _ aRect; CDVPrivate.IncludeAPainterRec[me, pr]; pr.data _ $on; }; CDDraw.InsertCommand[me.ct, CDDraw.Comm[cmd: rect, erase: FALSE, rect: aRect, ref: NIL]]; END; RemoveTheArrow: CDVFurtherPainters.FurtherPaintProc = <<--PROC [me: CDVPrivate.MyGraphicRef, key: REF]>> <<--eg. former paints ticks>> <<--called through ProtectedRepaint only>> <<--called in viewers paint proc>> BEGIN pr: REF CDVPrivate.PainterRec = GetAPainterRec[me]; IF pr.data = $on THEN { oldRect: CD.DesignRect _ pr.rect; pr.rect _ CDBasics.empty; pr.data _ NIL; CDDraw.InsertCommand[me.ct, CDDraw.Comm[cmd: rect, erase: TRUE, rect: oldRect, ref: NIL]]; CDVPrivate.RemoveAPainterRec[me, pr]; } END; CallOnOpenOrCreate: ViewerEvents.EventProc = <<-- PROC [viewer: ViewerClasses.Viewer, event: ViewerEvent, before: BOOL] RETURNS[abort: BOOL _ FALSE]>> TRUSTED BEGIN <<--crazy: we fork, because we want to wait >> Process.Detach[FORK ReInstallTheArrow[NARROW[viewer.data]]]; END; ReInstallTheArrow: PROC [me: CDVPrivate.MyGraphicRef] = BEGIN <<--crazy: we wait, to increase propability of the commandtable beeing initialized >> TRUSTED {Process.SetPriority[Process.priorityBackground]}; Process.Pause[Process.MsecToTicks[500]]; IF me.ct#NIL THEN { -- which now certainly is true WITH CDValue.Fetch[boundTo: me.actualDesign, key: $arrow, propagation: design] SELECT FROM pos: REF CD.DesignPosition => { CDDraw.InsertCommand[me.ct, CDDraw.Comm[cmd: ref, erase: FALSE, rect: [pos.x, pos.y, 0, 0], ref: $PutArrowXXX]] }; ENDCASE => { CDDraw.InsertCommand[me.ct, CDDraw.Comm[cmd: ref, erase: FALSE, rect: [0, 0, 0, 0], ref: $RemoveArrowXXX]] }; } END; Init: PROC [] = BEGIN CDValue.EnregisterKey[$arrow]; CDVFurtherPainters.InstallFurtherPaint[keyValue: $PutArrowXXX, proc: PaintTheArrow]; CDVFurtherPainters.InstallFurtherPaint[keyValue: $RemoveArrowXXX, proc: RemoveTheArrow]; [] _ ViewerEvents.RegisterEventProc[proc: CallOnOpenOrCreate, event: open, filter: $Chipndale, before: FALSE]; [] _ ViewerEvents.RegisterEventProc[proc: CallOnOpenOrCreate, event: create, filter: $Chipndale, before: FALSE]; END; Init[]; END.