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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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ScrollableView subclass:#HVScrollableView
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instanceVariableNames:'hScrollBar'
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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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HVScrollableView comment:'
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COPYRIGHT (c) 1991 by Claus Gittinger
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All Rights Reserved
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$Header: /cvs/stx/stx/libwidg/HVScrollableView.st,v 1.6 1994-08-07 13:22:38 claus Exp $
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written jan 91 by claus
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'!
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!HVScrollableView methodsFor:'documentation'!
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documentation
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"
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a view containing both horizontal and vertical scrollbars
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and some other (slave-)view
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"
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! !
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!HVScrollableView methodsFor:'initialization'!
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initializeFor:aViewClass miniScrollerH:miniH miniScrollerV:miniV
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|negativeOffset halfMargin orgX mrg halfSpacing is3D cls|
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"/ self initStyle.
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cls := miniH ifTrue:[HorizontalMiniScroller] ifFalse:[HorizontalScrollBar].
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style == #st80 ifTrue:[cls := HorizontalScrollBar].
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hScrollBar := cls in:self.
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super
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initializeFor:aViewClass
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miniScrollerH:miniH
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miniScrollerV:miniV.
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negativeOffset := borderWidth negated.
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halfMargin := innerMargin // 2.
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is3D := (style ~~ #normal) and:[style ~~ #mswindows].
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"
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change vertical scrollbars size
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"
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is3D ifTrue:[
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mrg := innerMargin + innerMargin + hScrollBar borderWidth.
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halfSpacing := ViewSpacing // 2.
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] ifFalse:[
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mrg := hScrollBar borderWidth
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].
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scrollBar extent:[scrollBar width @ (height - hScrollBar height - mrg)].
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hScrollBar thumbOrigin:0 thumbHeight:100.
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scrollBarPosition == #left ifTrue:[
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orgX := scrollBar origin x + scrollBar width.
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is3D ifTrue:[
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orgX := orgX + halfSpacing + 1.
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style == #st80 ifTrue:[
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orgX := orgX - (scrolledView margin)
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]
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]
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] ifFalse:[
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orgX := 0 - hScrollBar borderWidth
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].
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is3D ifTrue:[
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hScrollBar origin:[(orgX + innerMargin - halfSpacing - hScrollBar margin)
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@
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(height - hScrollBar height - halfMargin)
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]
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extent:[(width -
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scrollBar width -
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(innerMargin * 2))
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@
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hScrollBar height
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]
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] ifFalse:[
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scrollBarPosition == #left ifTrue:[
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hScrollBar
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origin:[(orgX + scrollBar borderWidth)
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@
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(height - hScrollBar height - (hScrollBar borderWidth "* 2"))
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]
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extent:[(width -
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scrollBar width "- (2 * hScrollBar borderWidth)")
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@
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hScrollBar height
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]
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] ifFalse:[
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hScrollBar
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origin:[(orgX)
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@
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(height - hScrollBar height - (hScrollBar borderWidth "* 2"))
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]
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extent:[(width - scrollBar width - hScrollBar borderWidth)
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@
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hScrollBar height
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]
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]
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].
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scrolledView notNil ifTrue:[
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"redefine subviews size"
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is3D ifTrue:[
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scrolledView
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extent:[(width
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- scrollBar width
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- (innerMargin * 2))
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@
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(height
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- hScrollBar height
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- (innerMargin * 2))
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]
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] ifFalse:[
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scrolledView
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extent:[(width
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- scrollBar width
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- scrollBar borderWidth
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"- scrolledView borderWidth")
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@
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(height
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- hScrollBar height
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- hScrollBar borderWidth
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"- scrolledView borderWidth")
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]
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].
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self setScrollActions
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].
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self viewGravity:#south
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!
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realize
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super realize.
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scrolledView notNil ifTrue:[
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hScrollBar setThumbFor:scrolledView
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]
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! !
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!HVScrollableView methodsFor:'private'!
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setScrollActions
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|lock|
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lock := false.
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scrollBar scrollAction:[:position |
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lock := true.
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scrolledView scrollVerticalToPercent:position.
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lock := false
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].
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scrollBar scrollUpAction:[scrolledView scrollUp].
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scrollBar scrollDownAction:[scrolledView scrollDown].
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hScrollBar scrollAction:[:position |
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lock := true.
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scrolledView scrollHorizontalToPercent:position.
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lock := false
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].
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hScrollBar scrollLeftAction:[scrolledView scrollLeft].
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hScrollBar scrollRightAction:[scrolledView scrollRight].
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scrolledView originChangeAction:[:aView |
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lock ifFalse:[
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scrollBar setThumbOriginFor:aView.
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hScrollBar setThumbOriginFor:aView
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]
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].
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scrolledView contentsChangeAction:[:aView |
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scrollBar setThumbFor:aView.
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hScrollBar setThumbFor:aView
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]
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! !
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!HVScrollableView methodsFor:'accessing'!
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horizontalScrollBar
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"return the horizontal scrollbar"
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^ hScrollBar
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!
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scrolledView:aView
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|is3D|
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"set the scrolled view"
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super scrolledView:aView.
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is3D := (style ~~ #normal) and:[style ~~ #mswindows].
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"redefine subviews size"
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is3D ifTrue:[
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scrolledView
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extent:[(width
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- scrollBar width
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- (innerMargin * 2))
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@
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(height
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- hScrollBar height
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- (innerMargin * 2))
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]
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] ifFalse:[
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scrolledView
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extent:[(width
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- scrollBar width
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- scrollBar borderWidth
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"- scrolledView borderWidth")
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@
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(height
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- hScrollBar height
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- hScrollBar borderWidth
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"- scrolledView borderWidth")
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]
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].
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self setScrollActions
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! !
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!HVScrollableView methodsFor:'event processing'!
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sizeChanged:how
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super sizeChanged:how.
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scrolledView notNil ifTrue:[
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hScrollBar setThumbFor:scrolledView
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]
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! !
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