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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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PanelView subclass:#VerticalPanelView
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instanceVariableNames:''
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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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VerticalPanelView 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/VerticalPanelView.st,v 1.8 1995-02-06 00:53:30 claus Exp $
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'!
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!VerticalPanelView 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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59
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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/VerticalPanelView.st,v 1.8 1995-02-06 00:53:30 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 which arranges its child-views in a vertical column.
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All real work is done in PanelView - except the layout computation is
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redefined here.
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The layout is controlled the instance variables:
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horizontalLayout and verticalLayout
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in addition to horizontalSpace and verticalSpace.
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The vertical layout can be any of:
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#top arrange elements at the top
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#topSpace arrange elements at the top, start with spacing
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#bottom arrange elements at the bottom
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#bottomSpace arrange elements at the bottom, start with spacing
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#center arrange elements in the center
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#spread spread elements evenly
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#spreadSpace spread elements evenly with spacing at ends
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#fit like spread, but resize elements for tight packing
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#fitSpace like fit, with spacing
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the horizontal layout can be:
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#left place element at the left
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#leftSpace place element at the left, offset by horizontalSpace
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#center place it horizontally centered
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#right place it at the right
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#rightSpace place it at the right, offset by horizontalSpace
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#fit resize elements horizontally to fit this panel
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#fitSpace like fit, but add spacing
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The defaults is #center for both directions.
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The layout is changed by the messages #verticalLayout: and #horizontalLayout:.
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For backward compatibility (to times, where only vLayout existed), the simple
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#layout: does the same as #verticalLayout:. Do not use this old method.
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If none of these layout/space combinations is exactly what you need in
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your application, create a subclass, and redefine the setChildPositions method.
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"
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!
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examples
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"
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These examples demonstrate the effect of different layout
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settings.
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You should try more examples, combining spacing and different
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verticalLayout:/horizontalLayout: combinations.
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example: default layout (centered)
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: top-layout
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#top.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: top-layout; horizontal fit
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#top.
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p horizontalLayout:#fit.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: top-layout; horizontal fit with space
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#top.
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p horizontalLayout:#fitSpace.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: topSpace-layout
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#topSpace.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: bottom-layout
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|v p b1 b2 b3|
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0
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#bottom.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: bottomSpace-layout
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#bottomSpace.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: spread-layout
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#spread.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: spreadSpace-layout
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#spreadSpace.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: fit-layout
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#fit.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: fitSpace-layout
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|v p b1 b2 b3|
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#fitSpace.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: fully fitSpace
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|v p b1 b2 b3|
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268 |
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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p verticalLayout:#fitSpace.
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p horizontalLayout:#fitSpace.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: from top, each at left:
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282 |
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283 |
|v p b1 b2 b3|
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284 |
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v := StandardSystemView new.
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p := VerticalPanelView in:v.
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287 |
p verticalLayout:#top.
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288 |
p horizontalLayout:#left.
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p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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b1 := Button label:'button1' in:p.
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b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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v open
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example: centered, right:
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298 |
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299 |
|v p b1 b2 b3|
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300 |
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301 |
v := StandardSystemView new.
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302 |
p := VerticalPanelView in:v.
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303 |
p verticalLayout:#centered.
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304 |
p horizontalLayout:#right.
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59
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305 |
p origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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306 |
b1 := Button label:'button1' in:p.
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307 |
b2 := Button label:'button2' in:p.
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b3 := Button label:'button3' in:p.
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v extent:100 @ 300.
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310 |
v open
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311 |
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77
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312 |
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313 |
example: a panel in a panel
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314 |
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315 |
|v hp p b1 b2 b3|
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316 |
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317 |
v := StandardSystemView new.
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318 |
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319 |
hp := HorizontalPanelView in:v.
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320 |
hp verticalLayout:#fit.
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321 |
hp horizontalLayout:#fitSpace.
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322 |
hp origin:(0.0 @ 0.0) corner:(1.0 @ 1.0).
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323 |
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324 |
1 to:3 do:[:i |
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325 |
p := VerticalPanelView in:hp.
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326 |
p borderWidth:0.
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327 |
p verticalLayout:#fitSpace.
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328 |
p horizontalLayout:#fit.
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329 |
b1 := Button label:'button1' in:p.
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330 |
b2 := Button label:'button2' in:p.
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331 |
b3 := Button label:'button3' in:p.
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332 |
].
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333 |
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334 |
v extent:300 @ 100.
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335 |
v open
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38
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336 |
"
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|
337 |
! !
|
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0
|
338 |
|
|
63
|
339 |
!VerticalPanelView methodsFor:'accessing'!
|
|
|
340 |
|
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|
341 |
horizontalLayout
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|
|
342 |
"return the horizontal layout as symbol.
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|
343 |
the returned value is one of
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344 |
#left
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345 |
#leftSpace
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346 |
#center
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347 |
#right
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348 |
#rightSpace
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349 |
#fit
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350 |
the default is #centered
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351 |
"
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352 |
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353 |
^ hLayout
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|
354 |
!
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355 |
|
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356 |
verticalLayout
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|
357 |
"return the vertical layout as a symbol.
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|
358 |
the returned value is one of
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|
359 |
#top
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|
360 |
#topSpace
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|
361 |
#spread
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|
362 |
#fit
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|
363 |
#center
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|
364 |
#bottom
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|
365 |
#bottomSpace
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|
366 |
the default is #centered
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|
367 |
"
|
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|
368 |
|
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|
369 |
^ vLayout
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|
370 |
!
|
|
|
371 |
|
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|
372 |
horizontalLayout:aSymbol
|
|
|
373 |
"change the horizontal layout as symbol.
|
|
|
374 |
The argument, aSymbol must be one of:
|
|
|
375 |
#left
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|
|
376 |
#leftSpace
|
|
|
377 |
#center
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|
|
378 |
#right
|
|
|
379 |
#rightSpace
|
|
|
380 |
#fit
|
|
|
381 |
the default (if never changed) is #centered
|
|
|
382 |
"
|
|
|
383 |
|
|
|
384 |
(hLayout ~~ aSymbol) ifTrue:[
|
|
|
385 |
hLayout := aSymbol.
|
|
|
386 |
self layoutChanged
|
|
|
387 |
]
|
|
|
388 |
!
|
|
|
389 |
|
|
|
390 |
verticalLayout:aSymbol
|
|
|
391 |
"change the vertical layout as a symbol.
|
|
|
392 |
The argument, aSymbol must be one of:
|
|
|
393 |
#top
|
|
|
394 |
#topSpace
|
|
|
395 |
#spread
|
|
|
396 |
#fit
|
|
|
397 |
#center
|
|
|
398 |
#bottom
|
|
|
399 |
#bottomSpace
|
|
|
400 |
the default (if never changed) is #centered
|
|
|
401 |
"
|
|
|
402 |
|
|
|
403 |
(vLayout ~~ aSymbol) ifTrue:[
|
|
|
404 |
vLayout := aSymbol.
|
|
|
405 |
self layoutChanged
|
|
|
406 |
]
|
|
|
407 |
!
|
|
|
408 |
|
|
|
409 |
layout
|
|
|
410 |
"leftover for historic reasons - do not use any more"
|
|
|
411 |
|
|
|
412 |
self verticalLayout
|
|
|
413 |
!
|
|
|
414 |
|
|
|
415 |
layout:aSymbol
|
|
|
416 |
"leftover for historic reasons - do not use any more"
|
|
|
417 |
|
|
|
418 |
self verticalLayout:aSymbol
|
|
|
419 |
! !
|
|
|
420 |
|
|
|
421 |
|
|
0
|
422 |
!VerticalPanelView methodsFor:'queries'!
|
|
|
423 |
|
|
|
424 |
preferedExtent
|
|
|
425 |
"return a good extent, one that makes subviews fit"
|
|
|
426 |
|
|
59
|
427 |
|sumOfHeights maxWidth maxHeight|
|
|
0
|
428 |
|
|
|
429 |
subViews isNil ifTrue:[^ horizontalSpace @ verticalSpace].
|
|
|
430 |
|
|
|
431 |
"compute net height needed"
|
|
|
432 |
|
|
|
433 |
sumOfHeights := 0.
|
|
|
434 |
maxWidth := 0.
|
|
65
|
435 |
maxHeight := 0.
|
|
0
|
436 |
|
|
|
437 |
subViews do:[:child |
|
|
63
|
438 |
|childsPreference|
|
|
|
439 |
|
|
|
440 |
childsPreference := child preferedExtent.
|
|
|
441 |
sumOfHeights := sumOfHeights + childsPreference y.
|
|
|
442 |
maxHeight := maxHeight max:childsPreference y.
|
|
|
443 |
maxWidth := maxWidth max:childsPreference x.
|
|
|
444 |
|
|
|
445 |
"/ sumOfHeights := sumOfHeights + child heightIncludingBorder.
|
|
|
446 |
"/ maxWidth := maxWidth max:(child widthIncludingBorder).
|
|
|
447 |
"/ maxHeight := maxHeight max:(child heightIncludingBorder).
|
|
0
|
448 |
].
|
|
|
449 |
borderWidth ~~ 0 ifTrue:[
|
|
59
|
450 |
sumOfHeights := sumOfHeights + (horizontalSpace * 2).
|
|
|
451 |
maxWidth := maxWidth + (horizontalSpace * 2).
|
|
0
|
452 |
].
|
|
77
|
453 |
(vLayout == #fit or:[vLayout == #fitSpace]) ifTrue:[
|
|
65
|
454 |
sumOfHeights := maxHeight * subViews size.
|
|
|
455 |
borderWidth ~~ 0 ifTrue:[
|
|
|
456 |
sumOfHeights := sumOfHeights + (verticalSpace * 2).
|
|
|
457 |
]
|
|
|
458 |
] ifFalse:[
|
|
|
459 |
sumOfHeights := sumOfHeights + ((subViews size - 1) * verticalSpace).
|
|
|
460 |
].
|
|
0
|
461 |
|
|
65
|
462 |
((hLayout == #leftSpace) or:[hLayout == #rightSpace]) ifTrue:[
|
|
|
463 |
maxWidth := maxWidth + horizontalSpace
|
|
|
464 |
] ifFalse:[
|
|
77
|
465 |
((hLayout == #fitSpace) or:[hLayout == #center]) ifTrue:[
|
|
65
|
466 |
maxWidth := maxWidth + (horizontalSpace * 2)
|
|
|
467 |
]
|
|
|
468 |
].
|
|
0
|
469 |
^ maxWidth @ sumOfHeights
|
|
|
470 |
! !
|
|
|
471 |
|
|
|
472 |
!VerticalPanelView methodsFor:'layout'!
|
|
|
473 |
|
|
|
474 |
setChildPositions
|
|
|
475 |
"(re)compute position of every child"
|
|
|
476 |
|
|
77
|
477 |
|ypos space sumOfHeights numChilds l hEach hInside|
|
|
0
|
478 |
|
|
|
479 |
subViews isNil ifTrue:[^ self].
|
|
|
480 |
|
|
|
481 |
space := verticalSpace.
|
|
63
|
482 |
numChilds := subViews size.
|
|
77
|
483 |
hInside := height - (margin * 2) + (borderWidth*2) - subViews last borderWidth.
|
|
0
|
484 |
|
|
77
|
485 |
vLayout == #fitSpace ifTrue:[
|
|
59
|
486 |
"
|
|
|
487 |
adjust childs extents and set origins.
|
|
|
488 |
Be careful to avoid accumulation of rounding errors
|
|
|
489 |
"
|
|
77
|
490 |
hEach := (hInside - (numChilds + 1 * space)) / numChilds.
|
|
59
|
491 |
ypos := space + margin - borderWidth.
|
|
63
|
492 |
] ifFalse:[
|
|
77
|
493 |
vLayout == #fit ifTrue:[
|
|
63
|
494 |
"
|
|
77
|
495 |
adjust childs extents and set origins.
|
|
|
496 |
Be careful to avoid accumulation of rounding errors
|
|
63
|
497 |
"
|
|
77
|
498 |
hEach := (hInside - (numChilds - 1 * space)) / numChilds.
|
|
|
499 |
ypos := margin - borderWidth.
|
|
63
|
500 |
] ifFalse:[
|
|
77
|
501 |
"
|
|
|
502 |
compute net height needed
|
|
|
503 |
"
|
|
|
504 |
sumOfHeights := subViews inject:0 into:[:sumSoFar :child | sumSoFar + child heightIncludingBorder].
|
|
|
505 |
|
|
|
506 |
l := vLayout.
|
|
|
507 |
((l == #center) and:[numChilds == 1]) ifTrue:[
|
|
|
508 |
l := #spread
|
|
|
509 |
].
|
|
|
510 |
(l == #spread and:[numChilds == 1]) ifTrue:[
|
|
|
511 |
l := #spreadSpace
|
|
|
512 |
].
|
|
59
|
513 |
|
|
77
|
514 |
"
|
|
|
515 |
compute position of topmost subview and space between them;
|
|
|
516 |
if they do hardly fit, leave no space between them
|
|
|
517 |
"
|
|
|
518 |
(sumOfHeights >= (height - (margin * 2))) ifTrue:[
|
|
|
519 |
"
|
|
|
520 |
if we have not enough space for all the elements,
|
|
|
521 |
fill them tight, and show what can be shown (at least)
|
|
|
522 |
"
|
|
|
523 |
ypos := 0.
|
|
|
524 |
space := 0
|
|
|
525 |
] ifFalse:[
|
|
|
526 |
((l == #bottom) or:[l == #bottomSpace]) ifTrue:[
|
|
|
527 |
ypos := height - (space * (numChilds - 1)) - sumOfHeights.
|
|
|
528 |
"
|
|
|
529 |
borderWidth == 0 ifTrue:[
|
|
|
530 |
ypos := ypos + space
|
|
|
531 |
].
|
|
|
532 |
"
|
|
|
533 |
l == #bottomSpace ifTrue:[
|
|
|
534 |
ypos >= space ifTrue:[
|
|
|
535 |
ypos := ypos - space
|
|
|
536 |
]
|
|
|
537 |
].
|
|
|
538 |
|
|
|
539 |
ypos < 0 ifTrue:[
|
|
|
540 |
space := space min:(height - sumOfHeights) // (numChilds + 1).
|
|
|
541 |
ypos := height - (space * numChilds) - sumOfHeights.
|
|
63
|
542 |
]
|
|
|
543 |
] ifFalse: [
|
|
77
|
544 |
(l == #spread) ifTrue:[
|
|
|
545 |
space := (height - sumOfHeights) // (numChilds - 1).
|
|
|
546 |
ypos := 0.
|
|
|
547 |
(space == 0) ifTrue:[
|
|
|
548 |
ypos := (height - sumOfHeights) // 2
|
|
|
549 |
]
|
|
|
550 |
] ifFalse: [
|
|
|
551 |
(l == #spreadSpace) ifTrue:[
|
|
|
552 |
space := (height - sumOfHeights) // (numChilds + 1).
|
|
|
553 |
ypos := space.
|
|
|
554 |
(space == 0) ifTrue:[
|
|
|
555 |
ypos := (height - sumOfHeights) // 2
|
|
|
556 |
]
|
|
|
557 |
] ifFalse: [
|
|
|
558 |
((l == #top) or:[l == #topSpace]) ifTrue:[
|
|
|
559 |
space := space min:(height - sumOfHeights) // (numChilds + 1).
|
|
|
560 |
l == #topSpace ifTrue:[
|
|
|
561 |
ypos := space.
|
|
|
562 |
] ifFalse:[
|
|
|
563 |
ypos := 0
|
|
|
564 |
]
|
|
63
|
565 |
] ifFalse:[
|
|
77
|
566 |
"center"
|
|
|
567 |
ypos := (height - (sumOfHeights
|
|
|
568 |
+ ((numChilds - 1) * space))) // 2.
|
|
|
569 |
ypos < 0 ifTrue:[
|
|
|
570 |
space := (height - sumOfHeights) // (numChilds + 1).
|
|
|
571 |
ypos := (height - (sumOfHeights
|
|
|
572 |
+ ((numChilds - 1) * space))) // 2.
|
|
|
573 |
]
|
|
63
|
574 |
]
|
|
77
|
575 |
]
|
|
63
|
576 |
]
|
|
|
577 |
]
|
|
77
|
578 |
].
|
|
63
|
579 |
].
|
|
|
580 |
].
|
|
|
581 |
|
|
|
582 |
"
|
|
|
583 |
now set positions
|
|
|
584 |
"
|
|
|
585 |
subViews do:[:child |
|
|
|
586 |
|xpos|
|
|
|
587 |
|
|
|
588 |
hLayout == #left ifTrue:[
|
|
|
589 |
xpos := 0
|
|
|
590 |
] ifFalse:[
|
|
|
591 |
hLayout == #leftSpace ifTrue:[
|
|
|
592 |
xpos := horizontalSpace
|
|
|
593 |
] ifFalse:[
|
|
|
594 |
hLayout == #right ifTrue:[
|
|
|
595 |
xpos := width - child widthIncludingBorder
|
|
|
596 |
] ifFalse:[
|
|
|
597 |
hLayout == #rightSpace ifTrue:[
|
|
|
598 |
xpos := width - horizontalSpace - child widthIncludingBorder.
|
|
|
599 |
] ifFalse:[
|
|
77
|
600 |
hLayout == #fitSpace ifTrue:[
|
|
63
|
601 |
xpos := horizontalSpace.
|
|
|
602 |
child width:(width - (horizontalSpace + child borderWidth * 2))
|
|
|
603 |
] ifFalse:[
|
|
77
|
604 |
hLayout == #fit ifTrue:[
|
|
|
605 |
xpos := 0.
|
|
|
606 |
child width:(width - (child borderWidth * 2))
|
|
|
607 |
] ifFalse:[
|
|
|
608 |
"centered"
|
|
|
609 |
xpos := (width - child widthIncludingBorder) // 2.
|
|
|
610 |
]
|
|
63
|
611 |
]
|
|
|
612 |
]
|
|
|
613 |
]
|
|
|
614 |
]
|
|
|
615 |
].
|
|
|
616 |
(xpos < 0) ifTrue:[ xpos := 0 ].
|
|
|
617 |
|
|
77
|
618 |
(vLayout == #fit or:[vLayout == #fitSpace]) ifTrue:[
|
|
59
|
619 |
child origin:(xpos @ ypos rounded)
|
|
|
620 |
corner:(xpos + (child width))
|
|
|
621 |
@ (ypos + hEach - (child borderWidth)) rounded.
|
|
77
|
622 |
ypos := ypos + hEach + space
|
|
63
|
623 |
] ifFalse:[
|
|
|
624 |
child origin:(xpos@ypos).
|
|
|
625 |
ypos := ypos + (child heightIncludingBorder) + space
|
|
59
|
626 |
]
|
|
0
|
627 |
]
|
|
|
628 |
! !
|