'From etoys2.1 of 6 September 2007 [latest update: #1654] on 17 September 2007 at 12:33:27 pm'!
"Change Set:		Paint-bulletproof-tk
Date:			17 September 2007
Author:			Ted Kaehler

One more piece of safety code in case the user turns the page of a Guide while painting."!


!SketchMorph methodsFor: 'menu' stamp: 'tk 9/17/2007 12:26'!
editDrawingIn: aPasteUpMorph forBackground: forBackground
	"Edit an existing sketch."

	| w bnds sketchEditor pal aPaintTab aWorld aPaintBox tfx oldRefPt newRefPt newRefPt2 trans |
	self world assureNotPaintingElse: [^self].
	oldRefPt := self referencePositionInWorld.
	w := aPasteUpMorph world.
	w prepareToPaint.
	w displayWorld.
	self visible: false.

	ActiveHand eventRecorders do: 
		[:er | er rememberPaintBoxSettingsAtRecordingOutset].

	sketchEditor := SketchEditorMorph new.
	bnds := sketchEditor findBounds: self in: aPasteUpMorph forBackground: forBackground.
			"it saves refPtOffset"
	forBackground 
		ifTrue: [sketchEditor setProperty: #background toValue: true].
	w addMorphFront: sketchEditor.
	sketchEditor 
		initializeFor: self
		inBounds: bnds
		pasteUpMorph: aPasteUpMorph.

	sketchEditor afterNewPicDo: 
			[:aForm :aRect | 
			newRefPt := (sketchEditor valueOfProperty: #refPtOffset) - (aRect origin - bnds origin).
				"in scale or original painting"
			newRefPt2 := self topRendererOrSelf == self 
				ifTrue: [newRefPt - (self rotationCenter * self extent)]
				ifFalse: ["transformed"
					trans := owner transform.
					(trans localPointToGlobal: newRefPt) - (trans localPointToGlobal:  (self rotationCenter * self extent))].
			self visible: true.
			self form: aForm.
			self rotationCenter: newRefPt asFloatPoint  / aRect extent.
				"a fraction of extent of the final sketch form"
			self position: (self rotationCenter * self extent) negated.
			tfx := aPasteUpMorph transformFrom: aPasteUpMorph world.	"may have moved"
			"align reference points (rotation centers) with original sketch"
			"self topRendererOrSelf position:" (tfx globalPointToLocal: oldRefPt + newRefPt2).
			"We do not understand how to get the vector from the new topLeft to the rotation center,
				so leave the object where it was!!  Ugh!!"
			self rotationStyle: sketchEditor rotationStyle.
			self forwardDirection: sketchEditor forwardDirection.
			aWorld := self currentWorld.
			(aPaintTab := aWorld paintingFlapTab) 
				ifNotNil: [aPaintTab hideFlap]
				ifNil: [(aPaintBox := aWorld paintBox) ifNotNil: [aPaintBox delete]].
			self presenter drawingJustCompleted: self.
			forBackground ifTrue: [self goBehind	"shouldn't be necessary"]]
		ifNoBits: 
			["If no bits drawn.  Must keep old pic.  Can't have no picture"

			self visible: true.
			aWorld := self currentWorld.
			"sometimes by now I'm no longer in a world myself, but we still need
				 to get ahold of the world so that we can deal with the palette"
			((pal := aPasteUpMorph standardPalette) notNil and: [pal isInWorld]) 
				ifTrue: 
					[(aPaintBox := aWorld paintBox) ifNotNil: [aPaintBox delete].
					pal viewMorph: self]
				ifFalse: 
					[(aPaintTab := (aWorld := self world) paintingFlapTab) 
						ifNotNil: [aPaintTab hideFlap]
						ifNil: [(aPaintBox := aWorld paintBox) ifNotNil: [aPaintBox delete]]]]! !