DIRECTORY
Atom,
Commander,
Convert,
SampledCurveEdit,
InputFocus,
FS,
Graphics,
IO,
Menus,
MessageWindow,
Process,
Rope,
RuntimeError,
TIPUser,
ViewerClasses,
ViewerOps
;

SampledCurveEditImpl: CEDAR MONITOR
IMPORTS Atom, Commander, Convert, InputFocus, FS, Graphics, IO, Menus, MessageWindow, Process, Rope, RuntimeError, TIPUser, ViewerOps
EXPORTS SampledCurveEdit
~ BEGIN OPEN SampledCurveEdit;

header: MarkedPoint ~ [2, 2, TRUE, open];
ROPE: TYPE ~ Rope.ROPE;

Tool: TYPE = REF ToolRec;
ToolRec: TYPE = RECORD [
actionQueue: LIST OF REF,
actionQueueEmpty: CONDITION,
outline: LIST OF Trajectory,
grabbed: LIST OF MarkedPoint,
grabbedCount: NAT,
selected: LIST OF MarkedPoint _ NIL,
selectedCount: NAT _ 0,
dragSource: MarkedPoint _ header,
paintRectangles: LIST OF PaintRectangle
];

PaintRectangle: TYPE ~ RECORD [
xMin, yMin, xMax, yMax: REAL
];

InitViewer: PROC [self: Viewer] = {
tool: Tool _ NEW[ToolRec];
tool.outline _ LIST[LIST[header]];
tool.grabbed _ NIL;
tool.grabbedCount _ 0;
self.column _ left;
self.data _ tool;
IF self.file # NIL THEN {
LoadFile[self];
};
};

LoadFile: PROC [self: Viewer] = {
Err: PROC [msg: ROPE, pos: INT _ -1] ~ {
MessageWindow.Append[msg, TRUE];
IF pos>=0 THEN MessageWindow.Append[Convert.RopeFromInt[pos], FALSE];
MessageWindow.Blink[];
};
stream: IO.STREAM _ FS.StreamOpen[self.file, $read ! FS.Error => {MessageWindow.Append[error.explanation, TRUE]; MessageWindow.Blink[]; GOTO Quit}];
outline: Outline _ NIL;
stack: ARRAY [0..10) OF REAL;
stackTop: INT _ 0;
PushReal: PROC [real: REAL] ~ {
IF stackTop >= 10 THEN {Err["SampledCurveEdit stack overflow at ", stream.GetIndex]; RETURN};
stack[stackTop] _ real;
stackTop _ stackTop + 1;
};
PopReal: PROC RETURNS [real: REAL] ~ {
IF stackTop <= 0 THEN {Err["SampledCurveEdit stack underflow at ", stream.GetIndex]; RETURN [0]};
stackTop _ stackTop - 1;
real _ stack[stackTop];
};
curTrajEnd: Trajectory _ NIL;
DO
r: REF ANY _ NIL;
r _ stream.GetRefAny[ ! IO.EndOfStream => CONTINUE];
IF r = NIL THEN EXIT;
WITH r SELECT FROM
refInt: REF INT => PushReal[refInt^];
refCard: REF LONG CARDINAL => PushReal[refCard^];
refReal: REF REAL => PushReal[refReal^];
atom: ATOM => {
SELECT atom FROM
$MOVETO => {
y: REAL _ PopReal[];
x: REAL _ PopReal[];
outline _ CONS[LIST[[x: 0, y: 0, isHeader: TRUE, kind: open], [x: x, y: y, isHeader: FALSE, kind: sample]], outline];
curTrajEnd _ outline.first.rest;
};
$LINETO => {
y: REAL _ PopReal[];
x: REAL _ PopReal[];
IF curTrajEnd = NIL THEN {Err["SampledCurveEdit Missing MOVETO", stream.GetIndex]; EXIT};
curTrajEnd.rest _ LIST[[x: x, y: y, isHeader: FALSE, kind: sample]];
curTrajEnd _ curTrajEnd.rest;
};
$CLOSE => {
y: REAL _ curTrajEnd.first.y;
x: REAL _ curTrajEnd.first.x;
outline.first.first.x _ x;
outline.first.first.y _ y;
outline.first.first.kind _ sample;
curTrajEnd _ NIL;
};
ENDCASE => {Err["SampledCurveEdit parse error at position ", stream.GetIndex]; EXIT};
};
ENDCASE => {Err["SampledCurveEdit parse error at position ", stream.GetIndex]; EXIT};
ENDLOOP;
IF stackTop # 0 THEN Err["SampledCurveEdit stack not empty at exit"];
SetOutline[self, outline];
stream.Close;
EXITS Quit => NULL;
};

SaveProc: PROC [self: Viewer, force: BOOL _ FALSE] = {
IF self.file # NIL THEN {
stream: IO.STREAM _ FS.StreamOpen[self.file, $create ! FS.Error => {MessageWindow.Append[error.explanation, TRUE]; MessageWindow.Blink[]; GOTO Quit}];
outline: Outline _ NIL;
WITH self.data SELECT FROM
tool: Tool => {outline _ tool.outline};
ENDCASE => NULL;
WHILE outline # NIL DO
traj: Trajectory _ outline.first;
IF traj.rest # NIL THEN {
stream.PutF["%g %g MOVETO\n", IO.real[traj.rest.first.x], IO.real[traj.rest.first.y]];
FOR p: PointList _ traj.rest.rest, p.rest UNTIL p=NIL DO
stream.PutF["  %g %g LINETO\n", IO.real[p.first.x], IO.real[p.first.y]];
ENDLOOP;
IF traj.rest.first.kind # open THEN {
stream.PutRope["  CLOSE"];
};
};
outline _ outline.rest;
ENDLOOP;
stream.Close;
};
EXITS Quit => NULL;
};

PaintPoint: PROCEDURE [context: Graphics.Context, x, y: REAL] = {
Graphics.SetColor[context, Graphics.black];
Graphics.DrawBox[context, [x-2, y-2, x+2, y+2]];
Graphics.SetColor[context, Graphics.white];
Graphics.DrawBox[context, [x-1, y-1, x+1, y+1]];
};

DrawOutline: PROCEDURE [tool: Tool, context: Graphics.Context] = {
FOR t: LIST OF Trajectory _ tool.outline, t.rest UNTIL t=NIL DO
IF t.first.rest # NIL THEN {
start: MarkedPoint _ t.first.first;
IF start.kind = open THEN start _ t.first.rest.first;
Graphics.SetCP[context, start.x, start.y];
FOR p: LIST OF MarkedPoint _ t.first.rest.rest, p.rest UNTIL p=NIL DO
Graphics.DrawTo[context, p.first.x, p.first.y];
ENDLOOP;
};
ENDLOOP;
IF tool.outline # NIL THEN {
FOR p: LIST OF MarkedPoint _ tool.outline.first.rest, p.rest UNTIL p=NIL DO
PaintPoint[context, p.first.x, p.first.y];
ENDLOOP;
};
};

InvertSelection: PROCEDURE [viewer: Viewer, context: Graphics.Context] = {
tool: Tool _ NARROW[viewer.data];
[] _ Graphics.SetPaintMode[context, invert];
Graphics.SetColor[context, Graphics.black];
IF tool.selected # NIL THEN {
list: LIST OF MarkedPoint _ tool.selected.rest;
FOR i: NAT IN [0..tool.selectedCount) DO
p: MarkedPoint _ list.first;
Graphics.DrawBox[context, [p.x-4, p.y-4, p.x+4, p.y+4]];
list _ list.rest;
IF list = NIL THEN list _ tool.outline.first.rest;
ENDLOOP;
};
};

MagSqr: PROCEDURE [x, y: REAL] RETURNS [REAL] = {RETURN[x*x+y*y]};

SelectNewTrajectory: PROCEDURE [tool: Tool, v: MarkedPoint] RETURNS [changed: BOOLEAN] ~ {
d: REAL _ 99999999;
last: LIST OF Trajectory _ NIL;
new: LIST OF Trajectory _ NIL;
IF tool.outline = NIL THEN RETURN [FALSE];
FOR t: LIST OF Trajectory _ tool.outline, t.rest UNTIL t=NIL DO
FOR p: LIST OF MarkedPoint _ t.first, p.rest UNTIL p.rest=NIL DO
markedPoint: MarkedPoint _ p.rest.first;
s: REAL _ MagSqr[markedPoint.x-v.x, markedPoint.y-v.y];
IF s < d THEN {new _ t; d _ s};
ENDLOOP;
last _ t;
ENDLOOP;
IF new = tool.outline THEN RETURN [FALSE];
last.rest _ tool.outline;
DO
IF tool.outline.rest = new THEN {tool.outline.rest _ NIL; tool.outline _ new; RETURN [TRUE]};
tool.outline _ tool.outline.rest;
ENDLOOP;
};

GrabPoint: PROCEDURE [tool: Tool, v: MarkedPoint] = {
d: REAL _ 99999999;
tool.grabbed _ NIL;
tool.grabbedCount _ 0;
IF tool.outline # NIL THEN {
FOR p: LIST OF MarkedPoint _ tool.outline.first, p.rest UNTIL p.rest=NIL DO
markedPoint: MarkedPoint _ p.rest.first;
s: REAL _ MagSqr[markedPoint.x-v.x, markedPoint.y-v.y];
IF s < d THEN {tool.grabbed _ p; tool.grabbedCount _ 1; d _ s};
ENDLOOP;
};
};

metersPerPixel: REAL ~ 3.527777e-4;
pixelsPerMeter: REAL ~ 1.0/metersPerPixel;

PaintProc: ViewerClasses.PaintProc
= {
tool: Tool _ NARROW[self.data];
SELECT whatChanged FROM
NIL => Notify[self, LIST[$Refresh]];
$PaintAll => {
Graphics.SetColor[context, Graphics.white];
Graphics.DrawBox[context, [0, 0, self.cw, self.ch]];
Graphics.SetColor[context, Graphics.black];
DrawOutline[tool, context];
InvertSelection[self, context];
};
$TouchUp => {
Graphics.SetColor[context, Graphics.white];
FOR paintList: LIST OF PaintRectangle _ tool.paintRectangles, paintList.rest UNTIL paintList = NIL DO
box: PaintRectangle ~ paintList.first;
Graphics.DrawBox[context, [box.xMin, box.yMin, box.xMax, box.yMax]];
ENDLOOP;
Graphics.SetColor[context, Graphics.black];
FOR paintList: LIST OF PaintRectangle _ tool.paintRectangles, paintList.rest UNTIL paintList = NIL DO
box: PaintRectangle ~ paintList.first;
mark: Graphics.Mark ~ Graphics.Save[context];
Graphics.ClipBox[context, [box.xMin, box.yMin, box.xMax, box.yMax]];
DrawOutline[tool, context];
InvertSelection[self, context];
Graphics.Restore[context, mark];
ENDLOOP;
};
$NewPt => {
p: MarkedPoint _ tool.outline.first.rest.first;
Graphics.SetColor[context, Graphics.black];
IF tool.outline.first.rest.rest # NIL THEN {
q: MarkedPoint _ tool.outline.first.rest.rest.first;
Graphics.SetCP[context, q.x, q.y];
Graphics.DrawTo[context, p.x, p.y];
PaintPoint[context, q.x, q.y];
};
PaintPoint[context, p.x, p.y];
};
$InvertGrabbed => IF tool.grabbed # NIL THEN {
prevKind: PointKind _ open;
list: LIST OF MarkedPoint;
[] _ Graphics.SetPaintMode[context, invert];
list _ tool.grabbed.rest;
FOR i: NAT IN [0..tool.grabbedCount) WHILE list # NIL DO
p: MarkedPoint _ list.first;
Graphics.DrawBox[context, [p.x-2, p.y-2, p.x+2, p.y+2]];
list _ list.rest;
ENDLOOP;
Graphics.SetCP[context, tool.grabbed.first.x, tool.grabbed.first.y];
prevKind _ tool.grabbed.first.kind;
list _ tool.grabbed.rest;
FOR i: NAT IN [0..tool.grabbedCount+1) WHILE list # NIL DO
p: MarkedPoint _ list.first;
IF prevKind = open OR p.kind = open
THEN Graphics.SetCP[context, p.x, p.y]
ELSE Graphics.DrawTo[context, p.x, p.y];
prevKind _ p.kind;
list _ list.rest;
ENDLOOP;
};
$EraseGrabbedPoint => IF tool.grabbed # NIL THEN {
list: LIST OF MarkedPoint _ tool.grabbed.rest;
Graphics.SetColor[context, Graphics.white];
FOR i: NAT IN [0..tool.grabbedCount) WHILE list # NIL DO
p: MarkedPoint _ list.first;
Graphics.DrawBox[context, [p.x-2, p.y-2, p.x+2, p.y+2]];
list _ list.rest;
ENDLOOP;
};
$InvertSel => InvertSelection[self, context];
ENDCASE => ERROR;
};	

ActionWithPoint: TYPE = REF ActionWithPointRep;
ActionWithPointRep: TYPE = RECORD [
atom: ATOM,
markedPoint: MarkedPoint
];

MalformedTrajectory: PUBLIC ERROR ~ CODE;
CopyTrajectory: PUBLIC PROC [trajectory: Trajectory] RETURNS [Trajectory] ~ {
IF trajectory = NIL THEN ERROR MalformedTrajectory
ELSE {
new: Trajectory ~ LIST[trajectory.first];
end: Trajectory _ new;
markedPoint: MarkedPoint _ trajectory.first;
IF NOT new.first.isHeader THEN ERROR MalformedTrajectory;
WHILE (trajectory _ trajectory.rest) # NIL DO
markedPoint _ trajectory.first;
IF markedPoint.isHeader THEN ERROR MalformedTrajectory;
end.rest _ LIST[markedPoint];
end _ end.rest;
ENDLOOP;
IF new.first.kind # open THEN {
headPoint: MarkedPoint _ new.first;
headPoint.isHeader _ markedPoint.isHeader;
IF headPoint # markedPoint THEN ERROR MalformedTrajectory;
};
RETURN [new];
};
};

CopyOutline: PUBLIC PROC [outline: Outline] RETURNS [Outline] ~ {
new: Outline ~ LIST[NIL];
end: Outline _ new;
WHILE outline # NIL DO
traj: Trajectory _ CopyTrajectory[outline.first];
end.rest _ LIST[traj];
end _ end.rest;
outline _ outline.rest;
ENDLOOP;
RETURN [new.rest];
};

GetOutline: PUBLIC ENTRY PROC [viewer: Viewer] RETURNS [Outline] ~ {
ENABLE UNWIND => NULL;
WITH viewer.data SELECT FROM
tool: Tool => {
UNTIL tool.actionQueue = NIL DO WAIT tool.actionQueueEmpty ENDLOOP;
RETURN [CopyOutline[tool.outline]]
};
ENDCASE => RETURN [NIL];
};

ObtainOutline: PUBLIC ENTRY PROC [viewer: Viewer] RETURNS [outline: Outline] ~ {
ENABLE UNWIND => NULL;
WITH viewer.data SELECT FROM
tool: Tool => {
UNTIL tool.actionQueue = NIL DO WAIT tool.actionQueueEmpty ENDLOOP;
outline _ tool.outline;
tool.outline _ NIL;
tool.grabbed _ tool.selected _ NIL;
tool.grabbedCount _ tool.selectedCount _ 0;
tool.actionQueue _ LIST[NIL, $PaintAll];
TRUSTED {Process.Detach[FORK DispatchProcess[viewer]]};
};
ENDCASE => RETURN [NIL];
};

SetOutline: PUBLIC PROC [viewer: Viewer, outline: Outline] ~ {
viewer.class.notify[viewer, LIST[outline]];
};

Notify: ENTRY ViewerClasses.NotifyProc = {
ENABLE {UNWIND => NULL; RuntimeError.UNCAUGHT => {MessageWindow.Append["SampledCurveEdit UNCAUGHT ERROR in Notify", TRUE]; MessageWindow.Blink[]; GOTO Quit}};
tool: Tool _ NARROW[self.data];
viewer: Viewer ~ self;
Unknown: PROC ~ {
stream: IO.STREAM _ IO.ROS[];
stream.PutRope["Unknown input: "];
stream.Put[IO.refAny[input]];
MessageWindow.Append[IO.RopeFromROS[stream], TRUE];
stream.Close[];
};
ActionKind: TYPE ~ {Ordinary, AutoInverse, Idempotent};
Queue: PROC [action: REF, kind: ActionKind _ $Ordinary, markedPoint: MarkedPoint _ header] ~ {
LastAction: PROC RETURNS [REF] ~ {
RETURN [WITH ultimate.first SELECT FROM
actionWithPoint: ActionWithPoint => actionWithPoint.atom,
ENDCASE => ultimate.first
]
};
penultimate: LIST OF REF _ NIL;
ultimate: LIST OF REF _ tool.actionQueue;
IF ultimate = NIL THEN TRUSTED {
ultimate _ tool.actionQueue _ LIST[NIL];
Process.Detach[FORK DispatchProcess[viewer]];
};
FOR q: LIST OF REF _ tool.actionQueue, q.rest UNTIL q = NIL DO
penultimate _ ultimate;
ultimate _ q;
ENDLOOP;
SELECT kind FROM
$Ordinary => NULL;
$AutoInverse => IF LastAction[] = action THEN {penultimate.rest _ NIL; RETURN};
$Idempotent => IF LastAction[] = action THEN {
WITH ultimate.first SELECT FROM
actionWithPoint: ActionWithPoint => actionWithPoint.markedPoint _ markedPoint;
ENDCASE => NULL;
RETURN
};
ENDCASE => ERROR;
ultimate.rest _ LIST[
IF markedPoint = header THEN action
ELSE NEW[ActionWithPointRep _ [NARROW[action], markedPoint]]
];
};
QueuePaintAll: PROC ~ {
q: LIST OF REF _ tool.actionQueue;
IF q # NIL THEN {
WHILE q.rest#NIL DO
SELECT q.rest.first FROM
$InvertSel, $InvertGrabbed, $TouchUp, $EraseGrabbedPoint, $PaintAll => q.rest _ q.rest.rest;
ENDCASE => q _ q.rest;
ENDLOOP;
};
Queue[$PaintAll];
};
QueueTouchUp: PROC ~ {
q: LIST OF REF _ tool.actionQueue;
deferred: LIST OF REF _ NIL;
IF q # NIL THEN {
WHILE q.rest#NIL DO
SELECT q.rest.first FROM
$TouchUp => {
deferred _ q.rest;
q.rest _ q.rest.rest;
deferred.rest _ NIL;
};
$InvertSel, $InvertGrabbed, $EraseGrabbedPoint => {
IF deferred # NIL THEN {
deferred.rest _ q.rest;
q.rest _ deferred;
deferred _ NIL;
q _ q.rest;
};
q _ q.rest;
};
ENDCASE => q _ q.rest;
ENDLOOP;
IF deferred # NIL THEN {q.rest _ deferred; RETURN};
};
Queue[$TouchUp];
};
WITH input.first SELECT FROM
atom: ATOM => {
SELECT atom FROM
$Clear => {Queue[$Clear]; QueuePaintAll[]};
$Delete => {
Queue[$DeleteSelected];
QueueTouchUp[];
};
$Refresh => QueuePaintAll[];
$Reverse => {
Queue[$InvertSel, $AutoInverse];
Queue[$ClearSel, $Idempotent];
Queue[$ReverseTrajectory, $AutoInverse];
};
$Save => {
Queue[$Save, $Idempotent];
};
$Smooth => {
Queue[$Smooth];
QueueTouchUp[];
};
ENDCASE => {
WITH Atom.GetProp[atom, viewerClass] SELECT FROM
pointModifier: PointModifier => {
Queue[pointModifier];
QueueTouchUp[];
};
ENDCASE => Unknown[];
};
};
outline: Outline => {
Queue[$ClearSel, $Idempotent];
Queue[outline];
QueuePaintAll[];
};
mousePlace: TIPUser.TIPScreenCoords => {
markedPoint: MarkedPoint _ [mousePlace.mouseX, mousePlace.mouseY, FALSE, sample];
IF InputFocus.GetInputFocus[].owner # viewer THEN InputFocus.SetInputFocus[viewer];
SELECT input.rest.first FROM
$AddPt => {
Queue[$InvertSel, $AutoInverse];
Queue[$AddPt, $Ordinary, markedPoint];
Queue[$NewPt];
Queue[$InvertSel, $AutoInverse];
};
$DeletePt => {
Queue[$GrabPt];
Queue[$DeleteGrabbed];
QueueTouchUp[];
};
$ExtendSelection => {
Queue[$InvertSel, $AutoInverse];
Queue[$ExtendSel, $Idempotent, markedPoint];
Queue[$InvertSel, $AutoInverse];
};
$GrabPt => {
Queue[$InvertSel, $AutoInverse];
Queue[$GrabPt, $Ordinary, markedPoint];
Queue[$InvertGrabbed];
Queue[$EraseGrabbedPoint];
Queue[$RecordGrabbedBox];
Queue[$MoveTo, $Idempotent, markedPoint];
Queue[$InvertGrabbed, $AutoInverse];
Queue[$InvertSel, $AutoInverse];
};
$MovePt => {
Queue[$InvertSel, $AutoInverse];
Queue[$InvertGrabbed, $AutoInverse];
Queue[$MoveTo, $Idempotent, markedPoint];
Queue[$InvertGrabbed, $AutoInverse];
Queue[$InvertSel, $AutoInverse];
};
$ReleasePt => {
Queue[$RecordGrabbedBox];
Queue[$ClearGrabbed];
QueueTouchUp[];
};
$SelectPt => {
Queue[$InvertSel, $AutoInverse];
Queue[$SelectPt, $Idempotent, markedPoint];
Queue[$InvertSel, $AutoInverse];
};
$SelectTrajectory => {
Queue[$RecordSelectionBox];
Queue[$ClearSel, $Idempotent];
Queue[$SelectTrajectory, $Idempotent, markedPoint];
QueueTouchUp[];
};
$ShowPt => {
s: IO.STREAM _ IO.ROS[];
s.PutF["%7.1g %7.1g ", IO.real[markedPoint.x], IO.real[markedPoint.y]];
MessageWindow.Append[s.RopeFromROS, TRUE];
};
$StartPt => {
Queue[$InvertSel, $AutoInverse];
Queue[$ClearSel, $Idempotent];
Queue[$RecordTrajectoryBox];
Queue[$StartPt, $Ordinary, markedPoint];
QueueTouchUp[];
Queue[$NewPt];
};
ENDCASE => Unknown[];
};
ENDCASE => Unknown[];
EXITS Quit => NULL;
}; 

Dequeue: ENTRY PROC [tool: Tool] RETURNS [ref: REF] ~ {
ENABLE UNWIND => NULL;
IF tool.actionQueue.rest = NIL THEN {
tool.actionQueue _ NIL;
ref _ NIL;
NOTIFY tool.actionQueueEmpty;
}
ELSE {
ref _ tool.actionQueue.rest.first;
tool.actionQueue.rest _ tool.actionQueue.rest.rest;
};
};

RegisterPointModifer: PUBLIC PROC [atom: ATOM, pointModifier: PointModifier] ~ {
Atom.PutProp[atom, viewerClass, pointModifier];
};

DispatchProcess: PROC [viewer: Viewer] ~ {
tool: Tool _ NARROW[viewer.data];
ref: REF;
box: PaintRectangle _ [xMin: 999999, yMin: 999999, xMax: -999999, yMax: -999999];
ResetBBox: PROC ~ {box _ [xMin: 999999, yMin: 999999, xMax: -999999, yMax: -999999]};
slop: REAL ~ 5;
BBPoint: PROC [markedPoint: MarkedPoint] ~ {
box.xMin _  MIN[box.xMin, markedPoint.x-slop];
box.xMax _  MAX[box.xMax, markedPoint.x+slop];
box.yMin _  MIN[box.yMin, markedPoint.y-slop];
box.yMax _  MAX[box.yMax, markedPoint.y+slop];
};
RecordBBox: PROC ~ {
IF box.xMin>box.xMax THEN RETURN;
FOR paintList: LIST OF PaintRectangle _ tool.paintRectangles, paintList.rest UNTIL paintList = NIL DO
old: PaintRectangle ~ paintList.first;
IF old.xMin<=box.xMin
AND old.yMin<=box.yMin
AND old.xMax>=box.xMax
AND old.yMax>=box.yMax THEN {
ResetBBox[];
RETURN;
};
IF box.xMin<=old.xMin
AND box.yMin<=old.yMin
AND box.xMax>=old.xMax
AND box.yMax>=old.yMax THEN {
paintList.first _ box;
ResetBBox[];
RETURN;
};
ENDLOOP;
tool.paintRectangles _ CONS[box, tool.paintRectangles];
};
BoundPoints: PROC [list: LIST OF MarkedPoint, count: NAT] ~ {
FOR i: NAT IN [0..count) WHILE list # NIL DO
IF list.first.kind # open THEN BBPoint[list.first];
list _ list.rest;
ENDLOOP;
};
RecordPoints: PROC [list: LIST OF MarkedPoint, count: NAT] ~ {
BoundPoints[list, count];
RecordBBox[];
};
WHILE (ref _ Dequeue[tool]) # NIL DO
action: ATOM _ $NothingMoreToDo;
markedPoint: MarkedPoint;
WITH ref SELECT FROM
atom: ATOM => action _ atom;
actionWithPoint: ActionWithPoint => {
action _ actionWithPoint.atom;
markedPoint _ actionWithPoint.markedPoint;
};
pointModifier: PointModifier => {
IF tool.selected # NIL THEN {
BoundPoints[tool.selected, tool.selectedCount+2];
IF pointModifier.pointModifyProc[pointModifier, tool.selected, tool.selectedCount]
THEN RecordPoints[tool.selected, tool.selectedCount+2]
ELSE ResetBBox[];
}
ELSE [] _ pointModifier.pointModifyProc[pointModifier, NIL, 0];
};
outline: Outline => {
tool.outline _ outline;
};
ENDCASE => ERROR;
SELECT action FROM
$NothingMoreToDo => NULL;
$Save => {
ViewerOps.SaveViewer[viewer];
};
$StartPt => {
tool.selected _ NIL;
tool.selectedCount _ 0;
tool.grabbed _ NIL;
tool.grabbedCount _ 0;
tool.outline _ CONS[LIST[header, markedPoint], tool.outline];
ViewerOps.SetNewVersion[viewer];
};
$SelectTrajectory => {
BoundPoints[tool.outline.first, LAST[NAT]];
IF SelectNewTrajectory[tool, markedPoint]
THEN RecordPoints[tool.outline.first, LAST[NAT]]
ELSE ResetBBox[];
};
$AddPt => {
IF tool.outline.first.rest # NIL AND tool.outline.rest.rest # NIL THEN {
tool.outline.first.rest.first.kind _ sample;
};
tool.outline.first.rest _ CONS[markedPoint, tool.outline.first.rest];
ViewerOps.SetNewVersion[viewer];
};
$Clear => {
tool.outline.first.rest _ tool.grabbed _ tool.selected _ NIL;
tool.outline.rest _ NIL;
tool.grabbedCount _ tool.selectedCount _ 0;
ViewerOps.SetNewVersion[viewer];
};
$ClearGrabbed => {
tool.grabbed _ NIL;
tool.grabbedCount _ 0;
};
$ClearSel => {
tool.selected _ NIL;
tool.selectedCount _ 0;
tool.grabbed _ NIL;
tool.grabbedCount _ 0;
};
$DeleteGrabbed => {
IF tool.outline.first.rest # NIL AND tool.grabbed # NIL THEN {
BBPoint[tool.grabbed.first];
BBPoint[tool.grabbed.rest.first];
IF tool.grabbed.rest.rest # NIL THEN BBPoint[tool.grabbed.rest.rest.first];
RecordBBox[];
markedPoint _ tool.grabbed.rest.first;
tool.grabbed.rest _ tool.grabbed.rest.rest;
};
tool.grabbed _ tool.selected _ NIL;
tool.grabbedCount _ tool.selectedCount _ 0;
ViewerOps.SetNewVersion[viewer];
};
$DeleteSelected => {
IF tool.selected # NIL THEN {
RecordPoints[tool.selected, tool.selectedCount+2];
THROUGH [0..tool.selectedCount) WHILE tool.selected.rest # NIL DO
tool.selected.rest _ tool.selected.rest.rest;
ENDLOOP;
};
tool.selected _ NIL;
tool.selectedCount _ 0;
tool.grabbed _ NIL;
tool.grabbedCount _ 0;
ViewerOps.SetNewVersion[viewer];
};
$ExtendSel => IF tool.selected # NIL THEN {
new: LIST OF MarkedPoint _ NIL;
count: INT _ 0;
grabbedToGo: INT _ LAST[INT];
selectedToGo: INT _ LAST[INT];
GrabPoint[tool, markedPoint];
FOR list: LIST OF MarkedPoint _ tool.outline.first, list.rest
UNTIL list = NIL OR (grabbedToGo<=0 AND selectedToGo<=0) DO
IF list = tool.grabbed THEN {
IF new = NIL THEN new _ tool.grabbed;
grabbedToGo _ tool.grabbedCount;
};
IF list = tool.selected THEN {
IF new = NIL THEN new _ tool.selected;
selectedToGo _ tool.selectedCount;
};
IF new # NIL THEN count _ count + 1;
grabbedToGo _ grabbedToGo - 1;
selectedToGo _ selectedToGo - 1;
ENDLOOP;
tool.selected _ new;
tool.selectedCount _ count;
tool.grabbed _ NIL;
tool.grabbedCount _ 0;
ViewerOps.SetNewVersion[viewer];
};
$GrabPt => GrabPoint[tool, markedPoint];
$MoveTo => {
markedPoint.kind _ tool.grabbed.rest.first.kind;
tool.grabbed.rest.first _ markedPoint;
ViewerOps.SetNewVersion[viewer];
};
$RecordGrabbedBox => RecordPoints[tool.grabbed, tool.grabbedCount+2];
$RecordTrajectoryBox => RecordPoints[tool.outline.first, LAST[NAT]];
$RecordSelectionBox => RecordPoints[tool.selected, tool.selectedCount];
$ReverseTrajectory => {
IF tool.outline # NIL THEN {
old: Trajectory _ tool.outline.first.rest;
tool.outline.first.rest _ NIL;
WHILE old # NIL DO
temp: Trajectory _ old;
old _ old.rest;
temp.rest _ tool.outline.first.rest;
tool.outline.first.rest _ temp
ENDLOOP;
};
ViewerOps.SetNewVersion[viewer];
};
$SelectPt => {
GrabPoint[tool, markedPoint];
IF tool.selected # tool.grabbed THEN {
tool.selected _ tool.grabbed;
tool.selectedCount _ tool.grabbedCount;
};
tool.grabbed _ NIL;
tool.grabbedCount _ 0;
};
$Smooth => {
IF tool.selected # NIL THEN {
list: LIST OF MarkedPoint _ tool.selected.rest;
prev: MarkedPoint _ tool.selected.first;
BBPoint[prev];
FOR i: NAT IN [0..tool.selectedCount) DO
current: MarkedPoint _ list.first;
next: MarkedPoint _ IF list.rest = NIL THEN tool.outline.first.rest.first ELSE list.rest.first;
BBPoint[current];
current.x _ (2*current.x + prev.x + next.x)/4;
current.y _ (2*current.y + prev.y + next.y)/4;
BBPoint[current];
prev _ list.first;
list.first _ current;
list _ list.rest;
IF list = NIL THEN list _ tool.outline.first.rest;
ENDLOOP;
BBPoint[list.first];
};
RecordBBox[];
ViewerOps.SetNewVersion[viewer];
};
$PaintAll, $TouchUp => {
ViewerOps.PaintViewer[viewer, client, FALSE, action];
tool.paintRectangles _ NIL;
};
$NewPt, $InvertGrabbed, $InvertSel, $EraseGrabbedPoint => {
ViewerOps.PaintViewer[viewer, client, FALSE, action];
};
ENDCASE => ERROR;
ENDLOOP;
};

MenuAction: Menus.ClickProc = {Notify[NARROW[parent], LIST[clientData]]};

AddMenuItem: PUBLIC PROC [atom: ATOM] = {
name: ROPE ~ Atom.GetPName[atom];
menu: Menus.Menu _ NARROW[viewerClass.menu];
ResetViewerMenu: PROC [v: Viewer] RETURNS [BOOL _ TRUE] ~ {
IF v.class = viewerClass THEN ViewerOps.SetMenu[v, menu];
};
Menus.AppendMenuEntry[
menu: menu,
entry: Menus.CreateEntry[
name: name,
proc: MenuAction,
clientData: atom,
documentation: NIL
]
];
ViewerOps.EnumerateViewers[ResetViewerMenu];
};

CreateMenu: PROC RETURNS [Menus.Menu] = {
menu: Menus.Menu _ Menus.CreateMenu[];
Menus.AppendMenuEntry[
menu: menu,
entry: Menus.CreateEntry[
name: "Clear",
proc: MenuAction,
clientData: $Clear,
documentation: "Clear the viewer"
]
];
Menus.AppendMenuEntry[
menu: menu,
entry: Menus.CreateEntry[
name: "Refresh",
proc: MenuAction,
clientData: $Refresh,
documentation: "Refresh the viewer"
]
];
Menus.AppendMenuEntry[
menu: menu,
entry: Menus.CreateEntry[
name: "Save",
proc: MenuAction,
clientData: $Save,
documentation: "Save the samples"
]
];
Menus.AppendMenuEntry[
menu: menu,
entry: Menus.CreateEntry[
name: "Smooth",
proc: MenuAction,
clientData: $Smooth,
documentation: "Smooth out the selected samples"
]
];
Menus.AppendMenuEntry[
menu: menu,
entry: Menus.CreateEntry[
name: "Reverse",
proc: MenuAction,
clientData: $Reverse,
documentation: "Reverse the order of the points in the current trajectory"
]
];
Menus.AppendMenuEntry[
menu: menu,
entry: Menus.CreateEntry[
name: "Delete",
proc: MenuAction,
clientData: $Delete,
documentation: "Delete the currently selected points"
]
];
RETURN [menu];
};

NewTIP: PUBLIC PROC = {
ResetViewerTIP: PROC [v: Viewer] RETURNS [BOOL _ TRUE] ~ {
IF v.class = viewerClass THEN v.tipTable _ viewerClass.tipTable;
};
viewerClass.tipTable _ TIPUser.InstantiateNewTIPTable["SampledCurveEdit.TIP"];
ViewerOps.EnumerateViewers[ResetViewerTIP];
};

viewerClass: ViewerClasses.ViewerClass _ NEW[ViewerClasses.ViewerClassRec _ [
paint:  PaintProc,
notify: Notify,
init: InitViewer,
save: SaveProc,
menu: CreateMenu[],
tipTable: TIPUser.InstantiateNewTIPTable["SampledCurveEdit.TIP"]
]];

Break: PROC [char: CHAR] RETURNS [IO.CharClass] = {
IF char = '_ OR char = '; THEN RETURN [break];
IF char = '  OR char = '	 OR char = ', OR char = '\n THEN RETURN [sepr];
RETURN [other];
};

GetToken: PROC [stream: IO.STREAM, breakProc: IO.BreakProc] RETURNS [rope: ROPE _ NIL] ~ {
rope _ stream.GetTokenRope[breakProc ! IO.EndOfStream => CONTINUE].token
};

SampledCurveEditCommand: Commander.CommandProc ~ {
stream: IO.STREAM _ IO.RIS[cmd.commandLine];
name: ROPE _ GetToken[stream, Break];
name _ FS.ExpandName[name ! FS.Error => {cmd.out.PutRope[error.explanation]; name _ NIL; CONTINUE}].fullFName;
IF Rope.Length[name] = 0 THEN 
[] _ ViewerOps.CreateViewer[$SampledCurveEdit, [name: "Sampled Curve Editor [No File]", file: NIL]]
ELSE
[] _ ViewerOps.CreateViewer[$SampledCurveEdit, [name: Rope.Concat["Sampled Curve Editor ", name], file: name]];
};

ViewerOps.RegisterViewerClass[$SampledCurveEdit, viewerClass];
Commander.Register["SampledCurveEdit", SampledCurveEditCommand, "Create a viewer to edit a sampled curve"];

END.


*SampledCurveEditImpl.mesa
Copyright (C) 1983, Xerox Corporation.  All rights reserved.
Michael Plass, September 24, 1984 3:11:36 pm PDT
Last Edited by: Stone, October 9, 1984 8:29:12 pm PDT
The first trajectory in the outline is the one currently being edited.
Points to the item before the point or points actually grabbed.
Points to the item before the point actually selected.
PROC [self: Viewer, context: Graphics.Context, whatChanged: REF ANY, clear: BOOL]
List head is present iff DispatchProcess is alive.
Records touchup box
Records touchup box
Records touchup box
Will record boxes that need touchup
Remove list head so Notify knows that DispatchProcess need restarting
Returning NIL will cause this DispatchProcess to go away.
In case an external client was waiting for access to the outline.
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