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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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View subclass:#PanelView
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instanceVariableNames:'layout verticalSpace horizontalSpace mustRearrange'
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classVariableNames:''
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poolDictionaries:''
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category:'Views-Layout'
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!
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PanelView comment:'
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COPYRIGHT (c) 1989 by Claus Gittinger
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All Rights Reserved
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$Header: /cvs/stx/stx/libwidg/PanelView.st,v 1.5 1994-08-07 13:23:05 claus Exp $
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'!
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!PanelView 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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$Header: /cvs/stx/stx/libwidg/PanelView.st,v 1.5 1994-08-07 13:23:05 claus Exp $
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"
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!
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documentation
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"
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this is a view for holding subviews. (layout-widget ?!!)
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Instances of PanelView try to get all their subviews into them,
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arranging subviews left-to-right, top-to-bottom.
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If you dont like its layout, define a new subclass or use one of
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the existing subclasses: HorizontalPanelView and VerticalPanelView.
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"
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! !
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!PanelView methodsFor:'initialization'!
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initialize
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super initialize.
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layout := #center.
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verticalSpace := ViewSpacing.
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horizontalSpace := ViewSpacing.
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mustRearrange := false
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!
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realize
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mustRearrange ifTrue:[
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self setChildPositions
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].
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super realize
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! !
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!PanelView methodsFor:'accessing'!
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verticalSpace:numberOfPixels
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"set the space between elements (default is 1mm)"
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verticalSpace := numberOfPixels
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!
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horizontalSpace:numberOfPixels
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"set the space between elements (default is 1mm)"
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horizontalSpace := numberOfPixels
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!
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space:numberOfPixels
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"set the space between elements (default is 1mm)"
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horizontalSpace := numberOfPixels.
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verticalSpace := numberOfPixels
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!
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layout
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"return the layout as symbol.
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the returned value is #left / #top; #spread; #center or #right / #bottom"
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^ layout
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layout:aSymbol
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"change the layout - the argument, aSymbol is interpreted in subclasses
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HorizontalPanelView and VerticalPanelView;
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it may be: #left / #top; #spread; #center or #right / #bottom"
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(layout ~~ aSymbol) ifTrue:[
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layout := aSymbol.
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self layoutChanged
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]
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!
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addSubView:aView
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"redefined to recompute layout when a subview is added"
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super addSubView:aView.
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self layoutChanged
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!
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addSubView:newView after:aView
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"redefined to recompute layout when a subview is added"
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super addSubView:newView after:aView.
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self layoutChanged
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!
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addSubView:newView before:aView
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"redefined to recompute layout when a subview is added"
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super addSubView:newView before:aView.
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self layoutChanged
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! !
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!PanelView methodsFor:'event processing'!
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sizeChanged:how
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super sizeChanged:how.
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self setChildPositions
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! !
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!PanelView methodsFor:'private'!
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layoutChanged
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shown ifTrue:[
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self setChildPositions
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] ifFalse:[
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mustRearrange := true
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]
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!
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setChildPositions
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"(re)compute position of every child"
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|first xpos ypos maxHeightInRow thisRow fixRow|
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subViews notNil ifTrue:[
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xpos := horizontalSpace.
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ypos := verticalSpace.
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maxHeightInRow := 0.
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first := true.
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thisRow := OrderedCollection new.
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subViews do:[:child |
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"go to next row, if this subview won't fit"
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first ifFalse: [
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(xpos + child widthIncludingBorder + horizontalSpace) > width
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ifTrue: [
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thisRow notEmpty ifTrue:[
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thisRow do:[:rowElement |
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rowElement heightIncludingBorder < maxHeightInRow ifTrue:[
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rowElement top:(rowElement top + (maxHeightInRow - rowElement heightIncludingBorder))
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]
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]
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].
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ypos := ypos + verticalSpace + maxHeightInRow.
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xpos := horizontalSpace.
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maxHeightInRow := 0.
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thisRow := OrderedCollection new.
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]
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].
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thisRow add:child.
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child origin:(xpos@ypos).
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xpos := xpos + (child widthIncludingBorder) + horizontalSpace.
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(maxHeightInRow < (child heightIncludingBorder)) ifTrue:[
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maxHeightInRow := child heightIncludingBorder
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].
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first := false
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].
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thisRow notEmpty ifTrue:[
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thisRow do:[:rowElement |
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rowElement heightIncludingBorder < maxHeightInRow ifTrue:[
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rowElement top:(rowElement top + (maxHeightInRow - rowElement heightIncludingBorder))
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]
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]
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].
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].
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mustRearrange := false
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! !
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