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"
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COPYRIGHT (c) 1991 by Claus Gittinger
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All Rights Reserved
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This software is furnished under a license and may be used
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only in accordance with the terms of that license and with the
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inclusion of the above copyright notice. This software may not
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be provided or otherwise made available to, or used by, any
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other person. No title to or ownership of the software is
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hereby transferred.
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"
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View subclass:#VariableVerticalPanel
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instanceVariableNames:'movedHandle prev start
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barHeight barWidth
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shadowForm lightForm
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handlePosition
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handleColor noColor'
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classVariableNames:'arrow defaultPosition'
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poolDictionaries:''
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category:'Views-Layout'
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!
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VariableVerticalPanel comment:'
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COPYRIGHT (c) 1991 by Claus Gittinger
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All Rights Reserved
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a View to separate its subviews vertically by a movable bar;
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the size-ratios of the subviews can be changed by moving this bar.
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The bar-handle is either an exposed knob (style == #motif)
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or the forms defined in Scroller (style ~~ #motif)
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$Header: /cvs/stx/stx/libwidg/VariableVerticalPanel.st,v 1.3 1993-10-13 02:49:51 claus Exp $
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written summer 91 by claus
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'!
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!VariableVerticalPanel class methodsFor:'initialization'!
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initialize
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"read defaults"
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super initialize.
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defaultPosition := Resource name:'VARIABLE_PANEL_HANDLE_POSITION'
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default:#right
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fromFile:'Smalltalk.rs'
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! !
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!VariableVerticalPanel class methodsFor:'defaults'!
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shadowFormOn:aDisplay
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"use same handle as Scroller"
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^ Scroller handleShadowFormOn:aDisplay
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!
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lightFormOn:aDisplay
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"use same handle as Scroller"
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^ Scroller handleLightFormOn:aDisplay
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! !
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!VariableVerticalPanel methodsFor:'initializing'!
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initialize
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super initialize.
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handlePosition := defaultPosition.
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noColor := Color noColor.
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handleColor := Black.
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self is3D ifTrue:[
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self barHeight:(3 * ViewSpacing)
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] ifFalse:[
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self barHeight:(2 * ViewSpacing)
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].
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barWidth := 2 * ViewSpacing "motif style width"
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!
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initStyle
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super initStyle.
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(self is3D and:[style == #next]) ifTrue:[
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shadowForm := self class shadowFormOn:device.
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lightForm := self class lightFormOn:device
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].
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shadowForm notNil ifTrue:[
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self barHeight:(shadowForm height + 2).
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barWidth := shadowForm width
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]
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!
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initCursor
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"set the cursor - a double arrow"
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"which one looks better ?"
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cursor := Cursor upDownArrow
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"cursor := Cursor upLimitArrow"
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!
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initEvents
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self enableButtonEvents.
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self enableButtonMotionEvents
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!
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fixSize
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super fixSize.
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self resizeSubviewsFrom:1 to:(subViews size)
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! !
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!VariableVerticalPanel methodsFor:'accessing'!
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add:aView
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"a view is added; make its size relative (if not already done)"
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super add:aView.
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shown ifTrue:[
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self setupSubviewSizes
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]
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!
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removeSubView:aView
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"a view is removed; adjust other subviews sizes"
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super removeSubView:aView.
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shown ifTrue:[
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self setupSubviewSizes
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]
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!
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barHeight:nPixel
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"set the height of the separating bar"
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barHeight := nPixel.
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"if screen is very low-res, make certain bar is visible and catchable"
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(barHeight < 4) ifTrue:[
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barHeight := 4
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].
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"make it even so spacing is equally spreadable among subviews"
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barHeight odd ifTrue:[
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barHeight := barHeight + 1
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]
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!
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handlePosition:aSymbol
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"define the position of the handle; the argument aSymbol
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may be one of #left, #right or #center"
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handlePosition := aSymbol
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!
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handlePosition
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"return the position of the handle"
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^ handlePosition
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!
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style:styleSymbol
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"define the style of the handle;
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styleSymbol may be #motif to draw a little knob or
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enything else to draw scrollBars handleForm"
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(styleSymbol ~~ style) ifTrue:[
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style := styleSymbol.
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shadowForm := self class shadowFormOn:device.
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lightForm := self class lightFormOn:device.
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(self is3D and:[style ~~ #motif]) ifTrue:[
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shadowForm notNil ifTrue:[
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self barHeight:(shadowForm height + 2).
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barWidth := shadowForm width
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]
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].
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self resizeSubviewsFrom:1 to:(subViews size).
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self redraw
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]
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! !
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!VariableVerticalPanel methodsFor:'drawing'!
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drawHandleFormAtX:hx y:hy
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"kludge for now"
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(viewBackground colorId notNil
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and:[shadowColor colorId notNil
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and:[lightColor colorId notNil]]) ifTrue:[
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self foreground:viewBackground background:noColor function:#xor.
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self drawOpaqueForm:shadowForm x:hx y:hy.
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self foreground:shadowColor function:#or.
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self drawOpaqueForm:shadowForm x:hx y:hy.
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self foreground:viewBackground function:#xor.
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self drawOpaqueForm:lightForm x:hx y:hy.
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self foreground:lightColor function:#or.
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self drawOpaqueForm:lightForm x:hx y:hy.
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self foreground:viewBackground.
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paint := nil. "kludge to force paint to be really set"
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self paint:viewBackground.
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self function:#copy
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]
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!
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drawHandleAtX:hx y:hy
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|h y m|
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(self is3D and:[shadowForm notNil]) ifTrue:[
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h := shadowForm height
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] ifFalse:[
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h := barHeight - 4
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].
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self paint:viewBackground.
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self fillRectangleX:margin y:hy
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width:(width - margin - margin)
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height:barHeight.
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self is3D ifTrue:[
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m := (barHeight - h) // 2.
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shadowForm isNil ifTrue:[
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y := hy + (barHeight // 2).
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style == #motif ifTrue:[
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self paint:shadowColor.
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self displayLineFromX:margin y:y toX:(width - margin) y:y.
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y := y + 1.
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self paint:lightColor.
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self displayLineFromX:margin y:y toX:(width - margin) y:y.
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].
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self paint:viewBackground.
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self fillRectangleX:(hx - barWidth) y:hy
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width:(barWidth + barWidth)
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height:h.
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self drawEdgesForX:(hx - barWidth)
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y:(hy + m)
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width:(barWidth + barWidth)
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height:h level:2
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] ifFalse:[
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self drawHandleFormAtX:hx y:(hy + m)
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]
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] ifFalse:[
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y := hy + barHeight - 1.
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self paint:handleColor.
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self displayLineFromX:0 y:hy+1 toX:width y:hy+1.
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self displayLineFromX:0 y:y toX:width y:y.
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self fillRectangleX:hx y:hy width:barHeight height:barHeight
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]
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!
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redrawHandlesFrom:start to:stop
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"redraw some handles"
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subViews notNil ifTrue:[
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self handleOriginsFrom:start to:stop do:[:hPoint |
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self drawHandleAtX:(hPoint x) y:(hPoint y)
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].
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movedHandle notNil ifTrue:[
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self noClipByChildren.
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self xoring:[
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self fillRectangleX:0 y:prev width:width height:barHeight
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].
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self clipByChildren
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]
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]
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!
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redraw
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"redraw the handles"
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self redrawHandlesFrom:1 to:(subViews size)
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! !
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!VariableVerticalPanel methodsFor:'events'!
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sizeChanged:how
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"tell subviews if I change size"
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(how == #smaller) ifTrue:[
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self resizeSubviewsFrom:1 to:(subViews size)
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] ifFalse:[
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self resizeSubviewsFrom:(subViews size) to:1
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]
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!
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buttonPress:button x:bx y:by
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"button was pressed - if it hits a handle, start move"
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|handle|
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(button == 1) ifTrue:[
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handle := 1.
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self handleOriginsDo:[:hPoint |
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|hy|
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hy := hPoint y.
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(by between:hy and:(hy + barHeight)) ifTrue:[
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movedHandle := handle.
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prev := hy.
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start := by - hy.
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self noClipByChildren.
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self xoring:[
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self fillRectangleX:0 y:hy width:width height:barHeight
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].
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self clipByChildren.
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^ self
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].
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handle := handle + 1
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].
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movedHandle := nil
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] ifFalse:[
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super buttonPress:button x:bx y:by
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]
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!
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buttonMotion:button x:bx y:by
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"mouse-button was moved while pressed;
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clear prev handleBar and draw handle bar at new position"
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|ypos limitTop limitBot|
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movedHandle isNil ifTrue: [^ self]. "should not happen"
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"speedup - if there is already another movement,
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ignore thisone ... "
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device synchronizeOutput.
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self buttonMotionEventPending ifTrue:[^ self].
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ypos := by - start.
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limitTop := barHeight // 2.
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limitBot := self height - barHeight.
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movedHandle > 1 ifTrue:[
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limitTop := (subViews at:movedHandle) origin y + (barHeight // 2)
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].
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movedHandle < (subViews size - 1) ifTrue:[
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limitBot := (subViews at:(movedHandle + 2)) origin y - barHeight
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].
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limitBot := limitBot - barHeight.
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(ypos < limitTop) ifTrue:[ "check against view limits"
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ypos := limitTop
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] ifFalse:[
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(ypos > limitBot) ifTrue:[
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ypos := limitBot
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]
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].
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self noClipByChildren.
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self xoring:[
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self fillRectangleX:0 y:prev width:width height:barHeight.
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self fillRectangleX:0 y:ypos width:width height:barHeight
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].
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self clipByChildren.
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prev := ypos
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!
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buttonRelease:button x:x y:y
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"end bar-move"
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|aboveView belowView aboveIndex belowIndex newY|
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(button == 1) ifTrue:[
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movedHandle isNil ifTrue:[^ self].
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"undo the last xor"
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self noClipByChildren.
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self xoring:[
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|
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self fillRectangleX:0 y:prev width:width height:barHeight
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].
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self clipByChildren.
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"compute the new relative heights"
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aboveIndex := movedHandle.
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belowIndex := movedHandle + 1.
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aboveView := subViews at:aboveIndex.
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belowView := subViews at:belowIndex.
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377 |
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newY := (prev + start / height) asFloat.
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aboveView relativeCorner:aboveView relativeCorner x @ newY.
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belowView relativeOrigin:belowView relativeOrigin x @ newY.
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self resizeSubviewsFrom:aboveIndex to:belowIndex.
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movedHandle := nil.
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|
384 |
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|
385 |
self redrawHandlesFrom:aboveIndex to:belowIndex
|
|
386 |
] ifFalse:[
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387 |
super buttonRelease:button x:x y:y
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|
388 |
]
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|
389 |
! !
|
|
390 |
|
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391 |
!VariableVerticalPanel methodsFor:'private'!
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|
392 |
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|
393 |
anyNonRelativeSubviews
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|
394 |
"return true, if any of my subviews has no relative origin/extent"
|
|
395 |
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|
396 |
1 to:(subViews size) do:[:index |
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|
397 |
|view|
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|
398 |
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|
399 |
view := subViews at:index.
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|
400 |
view relativeExtent isNil ifTrue:[^ true].
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|
401 |
view relativeOrigin isNil ifTrue:[^ true]
|
|
402 |
].
|
|
403 |
^ false
|
|
404 |
!
|
|
405 |
|
|
406 |
setupSubviewSizes
|
|
407 |
"setup subviews sizes (in case of non-relative sizes)"
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|
408 |
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|
409 |
|y h|
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|
410 |
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|
411 |
self anyNonRelativeSubviews ifTrue:[
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|
412 |
"there is at least one subview without
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|
413 |
relative origin/extent - setup all subviews
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|
414 |
to spread evenly ..."
|
|
415 |
|
|
416 |
y := 0.0.
|
|
417 |
h := 1.0 / (subViews size).
|
|
418 |
|
|
419 |
1 to:(subViews size) do:[:index |
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|
420 |
|view|
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|
421 |
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|
422 |
view := subViews at:index.
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|
423 |
index == subViews size ifTrue:[
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|
424 |
view origin:(0.0 @ y) corner:(1.0 @ 1.0)
|
|
425 |
] ifFalse:[
|
|
426 |
view origin:(0.0 @ y) corner:(1.0 @ (y + h))
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|
427 |
].
|
|
428 |
y := y + h
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|
429 |
]
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|
430 |
]
|
|
431 |
!
|
|
432 |
|
|
433 |
resizeSubviewsFrom:start to:stop
|
|
434 |
"readjust size of some subviews"
|
|
435 |
|
|
436 |
|step nSubviews|
|
|
437 |
|
|
438 |
subViews notNil ifTrue:[
|
|
439 |
(start <= stop) ifTrue:[
|
|
440 |
step := 1
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|
441 |
] ifFalse:[
|
|
442 |
step := -1
|
|
443 |
].
|
|
444 |
nSubviews := subViews size.
|
|
445 |
start to:stop by:step do:[:index |
|
|
446 |
|bw view o1 o2 relOrg relCorner newOrg newCorner|
|
|
447 |
|
|
448 |
view := subViews at:index.
|
|
449 |
bw := view borderWidth.
|
|
450 |
|
|
451 |
index == 1 ifTrue:[
|
|
452 |
o1 := 0.
|
|
453 |
] ifFalse:[
|
|
454 |
o1 := barHeight // 2 - bw
|
|
455 |
].
|
|
456 |
index == nSubviews ifTrue:[
|
|
457 |
o2 := 0.
|
|
458 |
] ifFalse:[
|
|
459 |
o2 := barHeight // 2 - bw
|
|
460 |
].
|
|
461 |
|
|
462 |
relCorner := view relativeCorner.
|
|
463 |
relCorner isNil ifTrue:[
|
|
464 |
self error:'subview must have relative corner'
|
|
465 |
].
|
|
466 |
newCorner := view cornerFromRelativeCorner.
|
|
467 |
newCorner notNil ifTrue:[
|
|
468 |
newCorner y:(newCorner y - o2)
|
|
469 |
].
|
|
470 |
|
|
471 |
relOrg := view relativeOrigin.
|
|
472 |
relOrg isNil ifTrue:[
|
|
473 |
self error:'subview must have relative origin'
|
|
474 |
].
|
|
475 |
newOrg := view originFromRelativeOrigin.
|
|
476 |
newOrg notNil ifTrue:[
|
|
477 |
(index ~~ 1) ifTrue:[
|
|
478 |
newOrg y:(newOrg y + o1)
|
|
479 |
].
|
|
480 |
].
|
|
481 |
view pixelOrigin:newOrg corner:newCorner
|
|
482 |
]
|
|
483 |
]
|
|
484 |
!
|
|
485 |
|
|
486 |
handleOriginsFrom:start to:stop do:aBlock
|
|
487 |
"evaluate the argument block for some handle-origins"
|
|
488 |
|
|
489 |
|x hw|
|
|
490 |
|
|
491 |
subViews notNil ifTrue:[
|
|
492 |
shadowForm notNil ifTrue:[
|
|
493 |
hw := shadowForm width
|
|
494 |
] ifFalse:[
|
|
495 |
hw := barHeight
|
|
496 |
].
|
|
497 |
(handlePosition == #left) ifTrue:[
|
|
498 |
x := hw * 2
|
|
499 |
] ifFalse:[
|
|
500 |
(handlePosition == #right) ifTrue:[
|
|
501 |
x := width - (2 * hw) - margin
|
|
502 |
] ifFalse:[
|
|
503 |
x := width // 2
|
|
504 |
]
|
|
505 |
].
|
|
506 |
(start + 1) to:stop do:[:index |
|
|
507 |
|view y|
|
|
508 |
|
|
509 |
view := subViews at:index.
|
|
510 |
y := view origin y - barHeight + 1.
|
|
511 |
aBlock value:(x @ y)
|
|
512 |
]
|
|
513 |
]
|
|
514 |
!
|
|
515 |
|
|
516 |
handleOriginsDo:aBlock
|
|
517 |
"evaluate the argument block for every handle-origin"
|
|
518 |
|
|
519 |
self handleOriginsFrom:1 to:(subViews size) do:aBlock
|
|
520 |
! !
|