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"
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5
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COPYRIGHT (c) 1989 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:#ScrollableView
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instanceVariableNames:'scrolledView scrollBar helpView innerMargin
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scrollBarPosition'
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Basic'
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!
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ScrollableView comment:'
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COPYRIGHT (c) 1989 by Claus Gittinger
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All Rights Reserved
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53
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$Header: /cvs/stx/stx/libwidg/Attic/ScrView.st,v 1.6 1994-08-23 23:38:46 claus Exp $
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'!
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!ScrollableView class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1989 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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!
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version
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"
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53
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$Header: /cvs/stx/stx/libwidg/Attic/ScrView.st,v 1.6 1994-08-23 23:38:46 claus Exp $
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"
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!
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documentation
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"
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a view containing a scrollbar and some other (slave-)view.
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There are two ways to create a ScrollableView:
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if the type of the view to be scrolled is known in advance,
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use:
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v := ScrollableView for:<ViewClass> in:someSuperView.
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otherwise, create the scrollableView empty with:
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v := ScrollableView in:someSuperView.
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...
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v scrolledView:aViewToBeScrolled
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example1:
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|top scr txt|
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top := StandardSystemView label:'example'.
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scr := ScrollableView for:EditTextView in:top.
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scr origin:0.0@0.0 corner:1.0@1.0.
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txt := scr scrolledView.
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txt list:#('line1'
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'line2'
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'line3'
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'line4'
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'line5'
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'line6').
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top open
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example2:
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|top scr txt1 txt2|
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top := StandardSystemView label:'example'.
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scr := ScrollableView in:top.
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scr origin:0.0@0.0 corner:1.0@1.0.
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top open.
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0
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(Delay forSeconds:5) wait.
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txt1 := EditTextView new.
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txt1 list:#('line1'
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'line2'
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'line3'
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'line4'
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'line5'
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'line6').
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scr scrolledView:txt1.
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(Delay forSeconds:5) wait.
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txt2 := EditTextView new.
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txt2 list:#('alternative line1'
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'alternative line2'
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'alternative line3'
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'alternative line4'
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'alternative line5'
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'alternative line6').
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scr scrolledView:txt2.
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"
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! !
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!ScrollableView class methodsFor:'instance creation'!
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in:aView
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"return a new scrolling view to be contained in aView.
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There is no slave view now - this has to be set later via
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the scrolledView: method.
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The view will have full scrollbars."
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^ self for:nil miniScrollerH:false miniScrollerV:false in:aView
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!
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for:aViewClass
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"return a new scrolling view scrolling an instance of aViewClass.
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The subview is created here.
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The view will have full scrollbars."
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^ self for:aViewClass miniScrollerH:false miniScrollerV:false in:nil
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!
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for:aViewClass in:aView
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"return a new scrolling view scrolling an instance of aViewClass.
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The subview is created here.
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The view will have full scrollbars."
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^ self for:aViewClass miniScrollerH:false miniScrollerV:false in:aView
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!
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for:aViewClass miniScroller:mini in:aView
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"return a new scrolling view scrolling an instance of aViewClass.
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The subview is created here.
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The view will have full scrollbars if mini is false, miniscrollers
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if true."
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^ self for:aViewClass miniScrollerH:mini miniScrollerV:mini in:aView
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!
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for:aViewClass miniScrollerH:miniH miniScrollerV:miniV in:aView
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"return a new scrolling view scrolling an instance of aViewClass.
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The subview is created here.
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The view will have full scrollbars if the corresponding miniH/miniV
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is false, miniscrollers if false."
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|newView|
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aView notNil ifTrue:[
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newView := self basicNew.
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newView device:(aView device).
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aView addSubView:newView
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] ifFalse:[
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"create on Display by default"
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newView := self new.
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].
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newView initializeFor:aViewClass miniScrollerH:miniH miniScrollerV:miniV.
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^ newView
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! !
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!ScrollableView methodsFor:'initialization'!
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initialize
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"default setup: full scrollers"
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^ self initializeFor:nil miniScrollerH:false miniScrollerV:false
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!
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initializeFor:aViewClass miniScrollerH:miniH miniScrollerV:miniV
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|negativeOffset twoMargins halfMargin cls|
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super initialize.
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style == #openwin ifTrue:[self level:0].
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style == #st80 ifTrue:[
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innerMargin := 0
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] ifFalse:[
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innerMargin := ViewSpacing.
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].
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0
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negativeOffset := borderWidth negated.
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"create the scrollbar"
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cls := miniV ifTrue:[MiniScroller] ifFalse:[ScrollBar].
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style == #st80 ifTrue:[cls := ScrollBar].
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scrollBar := cls in:self.
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scrollBar thumbOrigin:0 thumbHeight:100.
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"create the subview"
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((style ~~ #normal) and:[style ~~ #mswindows]) ifTrue:[
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twoMargins := innerMargin * 2.
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halfMargin := innerMargin // 2.
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aViewClass notNil ifTrue:[
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scrolledView := aViewClass in:self.
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style == #openwin ifTrue:[
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scrolledView level:0.
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scrolledView borderWidth:1
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] ifFalse:[
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style == #st80 ifTrue:[
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scrolledView level:1.
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] ifFalse:[
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scrolledView level:-1
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]
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].
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].
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(scrollBarPosition == #right) ifTrue:[
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scrollBar origin:[width - scrollBar extent x
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- (scrollBar borderWidth * 2)
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- halfMargin
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@
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halfMargin]
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extent:[scrollBar extent x @ (height - innerMargin)].
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222 |
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scrolledView notNil ifTrue:[
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scrolledView origin:halfMargin asPoint
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extent:[(width -
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scrollBar width -
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twoMargins)
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@
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(height - innerMargin)].
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]
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] ifFalse:[
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scrollBar origin:halfMargin asPoint
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extent:[scrollBar extent x @ (height - innerMargin)].
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234 |
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scrolledView notNil ifTrue:[
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scrolledView origin:((scrollBar origin x + scrollBar width + innerMargin)
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@
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halfMargin)
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extent:[(width - scrollBar width - twoMargins)
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@
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(height - innerMargin)].
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]
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7
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].
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0
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] ifFalse:[
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(scrollBarPosition == #right) ifTrue:[
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scrollBar origin:[width - scrollBar extent x
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- scrollBar borderWidth
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@
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249 |
negativeOffset]
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] ifFalse:[
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7
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scrollBar origin:negativeOffset asPoint
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0
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252 |
].
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scrollBar extent:[scrollBar extent x @ (height "+ (scrollBar borderWidth * 1)")].
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254 |
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aViewClass notNil ifTrue:[
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256 |
scrolledView := aViewClass in:self.
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7
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(scrollBarPosition == #right) ifTrue:[
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scrolledView origin:scrolledView borderWidth negated asPoint
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0
|
259 |
] ifFalse:[
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260 |
scrolledView origin:((scrollBar width +
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261 |
scrollBar borderWidth -
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262 |
scrolledView borderWidth)
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0
|
263 |
@
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|
264 |
scrolledView borderWidth negated)
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265 |
].
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266 |
scrolledView extent:[(width - scrollBar width - scrolledView borderWidth)
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0
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@
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(height + (scrollBar borderWidth))
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269 |
]
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270 |
].
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271 |
].
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272 |
scrolledView notNil ifTrue:[
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38
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273 |
self setScrollActions.
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274 |
"
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275 |
pass input to myself (and other subviews) to
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276 |
the scrolled view
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277 |
"
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278 |
self keyboardHandler:scrolledView.
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0
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]
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!
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281 |
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7
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282 |
initStyle
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super initStyle.
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284 |
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38
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((style == #motif)
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286 |
or:[(style == #mswindows)
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|
287 |
or:[style == #openwin]]) ifTrue:[
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7
|
288 |
scrollBarPosition := #right
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38
|
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] ifFalse:[
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|
290 |
scrollBarPosition := #left.
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7
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].
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!
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293 |
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realize
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super realize.
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38
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296 |
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297 |
"since scrolledview may have done something to its contents
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298 |
during init-time we had no chance yet to catch contents-
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299 |
changes; do it now
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300 |
"
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38
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301 |
scrolledView notNil ifTrue:[
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302 |
scrollBar setThumbFor:scrolledView
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303 |
]
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0
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304 |
! !
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305 |
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7
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306 |
!ScrollableView methodsFor:'private'!
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307 |
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308 |
setScrollActions
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309 |
|lock|
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310 |
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311 |
"lock prevents repositioning the scroller to the
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312 |
actual (often rounded) position while scrolling,
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313 |
and keeps it instead at the pointer position.
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314 |
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|
315 |
(this avoids run-away scroller when scrolling
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|
316 |
textviews, when the text is aligned line-wise).
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38
|
317 |
Consider this as a kludge."
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7
|
318 |
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|
319 |
lock := false.
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320 |
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321 |
scrollBar scrollAction:[:position |
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|
322 |
lock := true.
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323 |
scrolledView scrollVerticalToPercent:position.
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|
324 |
lock := false
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|
325 |
].
|
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|
326 |
scrollBar scrollUpAction:[scrolledView scrollUp].
|
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|
327 |
scrollBar scrollDownAction:[scrolledView scrollDown].
|
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328 |
|
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|
329 |
scrolledView originChangeAction:[:aView |
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|
330 |
lock ifFalse:[
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|
331 |
scrollBar setThumbOriginFor:aView.
|
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|
332 |
]
|
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|
333 |
].
|
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|
334 |
scrolledView contentsChangeAction:[:aView |
|
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|
335 |
scrollBar setThumbFor:aView.
|
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|
336 |
]
|
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|
337 |
! !
|
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|
338 |
|
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0
|
339 |
!ScrollableView methodsFor:'accessing'!
|
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|
340 |
|
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341 |
scrollBar
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|
342 |
"return the scrollbar"
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|
343 |
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|
344 |
^ scrollBar
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|
345 |
!
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|
346 |
|
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347 |
scrolledView
|
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|
348 |
"return the scrolled view"
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349 |
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|
350 |
^ scrolledView
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|
351 |
!
|
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|
352 |
|
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|
353 |
scrolledView:aView
|
|
38
|
354 |
"set the view to scroll"
|
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|
355 |
|
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|
356 |
|halfMargin twoMargins|
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0
|
357 |
|
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|
358 |
scrolledView notNil ifTrue:[
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38
|
359 |
scrolledView destroy.
|
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|
360 |
scrolledView := nil.
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0
|
361 |
].
|
|
|
362 |
scrolledView := aView.
|
|
|
363 |
|
|
38
|
364 |
((style ~~ #normal) and:[style ~~ #mswindows]) ifTrue:[
|
|
|
365 |
"3D look"
|
|
|
366 |
|
|
|
367 |
twoMargins := innerMargin * 2.
|
|
|
368 |
halfMargin := innerMargin // 2.
|
|
0
|
369 |
|
|
38
|
370 |
style == #openwin ifTrue:[
|
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|
371 |
scrolledView level:0.
|
|
|
372 |
scrolledView borderWidth:1
|
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|
373 |
] ifFalse:[
|
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|
374 |
scrolledView level:-1
|
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|
375 |
].
|
|
|
376 |
|
|
7
|
377 |
(scrollBarPosition == #right) ifTrue:[
|
|
38
|
378 |
scrolledView
|
|
|
379 |
origin:halfMargin asPoint
|
|
|
380 |
extent:[(width -
|
|
|
381 |
scrollBar width -
|
|
|
382 |
twoMargins)
|
|
|
383 |
@
|
|
|
384 |
(height - innerMargin)
|
|
|
385 |
].
|
|
7
|
386 |
] ifFalse:[
|
|
38
|
387 |
scrolledView
|
|
|
388 |
origin:((scrollBar origin x
|
|
|
389 |
+ scrollBar width
|
|
|
390 |
+ innerMargin)
|
|
|
391 |
@
|
|
|
392 |
halfMargin)
|
|
|
393 |
extent:[(width
|
|
|
394 |
- scrollBar width
|
|
|
395 |
- twoMargins)
|
|
|
396 |
@
|
|
|
397 |
(height - innerMargin)
|
|
|
398 |
].
|
|
|
399 |
]
|
|
|
400 |
] ifFalse:[
|
|
|
401 |
"non 3D look"
|
|
|
402 |
(scrollBarPosition == #right) ifTrue:[
|
|
|
403 |
scrolledView
|
|
|
404 |
origin:scrolledView borderWidth negated asPoint
|
|
|
405 |
] ifFalse:[
|
|
|
406 |
scrolledView
|
|
|
407 |
origin:((scrollBar width
|
|
|
408 |
+ scrollBar borderWidth
|
|
|
409 |
- scrolledView borderWidth)
|
|
|
410 |
@
|
|
|
411 |
scrolledView borderWidth negated)
|
|
7
|
412 |
].
|
|
38
|
413 |
scrolledView
|
|
|
414 |
extent:[
|
|
|
415 |
(width
|
|
|
416 |
- scrollBar width
|
|
|
417 |
- scrolledView borderWidth)
|
|
|
418 |
@
|
|
|
419 |
(height
|
|
|
420 |
+ (scrollBar borderWidth))
|
|
|
421 |
]
|
|
0
|
422 |
].
|
|
|
423 |
|
|
38
|
424 |
super addSubView:scrolledView.
|
|
|
425 |
self setScrollActions.
|
|
|
426 |
"
|
|
|
427 |
pass input to myself (and other subviews) to
|
|
|
428 |
the scrolled view
|
|
|
429 |
"
|
|
|
430 |
self keyboardHandler:scrolledView.
|
|
|
431 |
|
|
|
432 |
realized ifTrue:[
|
|
|
433 |
self sizeChanged:nil.
|
|
|
434 |
scrolledView realize
|
|
|
435 |
].
|
|
0
|
436 |
! !
|
|
|
437 |
|
|
|
438 |
!ScrollableView methodsFor:'slave-view messages'!
|
|
|
439 |
|
|
|
440 |
leftButtonMenu
|
|
38
|
441 |
"return scrolledViews leftbuttonmenu"
|
|
|
442 |
|
|
|
443 |
scrolledView isNil ifTrue:[^ nil].
|
|
0
|
444 |
^ scrolledView leftButtonMenu
|
|
|
445 |
!
|
|
|
446 |
|
|
|
447 |
leftButtonMenu:aMenu
|
|
|
448 |
"pass on leftbuttonmenu to scrolledView"
|
|
|
449 |
|
|
|
450 |
scrolledView leftButtonMenu:aMenu
|
|
|
451 |
!
|
|
|
452 |
|
|
|
453 |
middleButtonMenu
|
|
38
|
454 |
"return scrolledViews middlebuttonmenu"
|
|
|
455 |
|
|
|
456 |
scrolledView isNil ifTrue:[^ nil].
|
|
0
|
457 |
^ scrolledView middleButtonMenu
|
|
|
458 |
!
|
|
|
459 |
|
|
|
460 |
middleButtonMenu:aMenu
|
|
|
461 |
"pass on middlebuttonmenu to scrolledView"
|
|
|
462 |
|
|
|
463 |
scrolledView middleButtonMenu:aMenu
|
|
|
464 |
!
|
|
|
465 |
|
|
|
466 |
rightButtonMenu
|
|
38
|
467 |
"return scrolledViews rightbuttonmenu"
|
|
|
468 |
|
|
|
469 |
scrolledView isNil ifTrue:[^ nil].
|
|
0
|
470 |
^ scrolledView rightButtonMenu
|
|
|
471 |
!
|
|
|
472 |
|
|
|
473 |
rightButtonMenu:aMenu
|
|
|
474 |
"pass on rightbuttonmenu to scrolledView"
|
|
|
475 |
|
|
|
476 |
scrolledView rightButtonMenu:aMenu
|
|
|
477 |
!
|
|
|
478 |
|
|
|
479 |
doesNotUnderstand:aMessage
|
|
|
480 |
"this is funny: all message we do not understand, are passed
|
|
|
481 |
on to the scrolledView - so we do not have to care for all
|
|
|
482 |
possible messages ...(thanks to the Message class)"
|
|
|
483 |
|
|
|
484 |
scrolledView isNil ifFalse:[
|
|
|
485 |
^ scrolledView perform:(aMessage selector)
|
|
|
486 |
withArguments:(aMessage arguments)
|
|
|
487 |
]
|
|
|
488 |
! !
|
|
|
489 |
|
|
38
|
490 |
!ScrollableView methodsFor:'forced scroll'!
|
|
|
491 |
|
|
|
492 |
pageUp
|
|
|
493 |
"page up"
|
|
|
494 |
|
|
|
495 |
scrollBar pageUp
|
|
|
496 |
!
|
|
|
497 |
|
|
|
498 |
pageDown
|
|
|
499 |
"page down"
|
|
|
500 |
|
|
|
501 |
scrollBar pageDown
|
|
|
502 |
! !
|
|
|
503 |
|
|
0
|
504 |
!ScrollableView methodsFor:'event processing'!
|
|
|
505 |
|
|
38
|
506 |
keyPress:key x:x y:y
|
|
|
507 |
"a key was pressed - handle page-keys here"
|
|
|
508 |
|
|
|
509 |
(key == #Prior) ifTrue: [^ self pageUp].
|
|
|
510 |
(key == #Next) ifTrue: [^ self pageDown].
|
|
|
511 |
|
|
|
512 |
super keyPress:key x:x y:y
|
|
|
513 |
!
|
|
|
514 |
|
|
0
|
515 |
sizeChanged:how
|
|
|
516 |
super sizeChanged:how.
|
|
38
|
517 |
scrolledView notNil ifTrue:[
|
|
|
518 |
scrollBar setThumbFor:scrolledView
|
|
|
519 |
]
|
|
0
|
520 |
! !
|