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COPYRIGHT (c) 1995 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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'From Smalltalk/X, Version:2.10.4 on 6-mar-1995 at 20:00:02'!
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Controller subclass:#VariableVerticalPanelController
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instanceVariableNames:'movedHandle prev start'
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classVariableNames:''
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poolDictionaries:''
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category:'Interface-Support'
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!
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!VariableVerticalPanelController class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1995 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/VariableVerticalPanelController.st,v 1.1 1995-03-06 21:06:04 claus Exp $
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"
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! !
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!VariableVerticalPanelController methodsFor:'event handling'!
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buttonMotion:button x:bx y:by
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"mouse-button was moved while pressed;
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clear prev handleBar and draw handle bar at new position"
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|ypos limitTop limitBot subViews barHeight|
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movedHandle isNil ifTrue: [^ self]. "should not happen"
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"speedup - if there is already another movement,
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ignore thisone ... "
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view buttonMotionEventPending ifTrue:[^ self].
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ypos := by - start.
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"
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the two lines below will not allow resizing down to zero
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(so that some is always visible)
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"
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"/ limitTop := barHeight // 2.
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"/ limitBot := self height - barHeight.
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"
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these allow resizing to zero - which is better ?
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"
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limitTop := 0.
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limitBot := view innerHeight.
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subViews := view subViews.
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barHeight := view barHeight.
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movedHandle > 1 ifTrue:[
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limitTop := (subViews at:movedHandle) origin y + (barHeight // 2)
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].
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movedHandle < (subViews size - 1) ifTrue:[
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limitBot := (subViews at:(movedHandle + 2)) origin y - barHeight
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].
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limitBot := limitBot - barHeight.
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(ypos < limitTop) ifTrue:[ "check against view limits"
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ypos := limitTop
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] ifFalse:[
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(ypos > limitBot) ifTrue:[
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ypos := limitBot
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]
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].
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view invertHandleBarAtX:0 y:prev.
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view invertHandleBarAtX:0 y:ypos.
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prev := ypos
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!
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buttonRelease:button x:x y:y
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"end bar-move"
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|aboveView belowView aboveIndex belowIndex newY oldY group subViews|
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((button == 1) or:[button == #select]) ifTrue:[
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movedHandle isNil ifTrue:[^ self].
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(group := view windowGroup) notNil ifTrue:[
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group restoreCursors
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].
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"undo the last xor"
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view invertHandleBarAtX:0 y:prev.
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"compute the new relative heights"
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aboveIndex := movedHandle.
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belowIndex := movedHandle + 1.
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movedHandle := nil.
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subViews := view subViews.
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aboveView := subViews at:aboveIndex.
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belowView := subViews at:belowIndex.
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oldY := aboveView relativeCorner y.
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newY := (prev + start / view height) asFloat.
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aboveView relativeCorner:aboveView relativeCorner x @ newY.
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belowView relativeOrigin:belowView relativeOrigin x @ newY.
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view lockRedraw.
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oldY > newY ifTrue:[
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view resizeSubviewsFrom:aboveIndex to:belowIndex.
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] ifFalse:[
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view resizeSubviewsFrom:belowIndex to:aboveIndex.
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].
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view redrawHandlesFrom:aboveIndex to:belowIndex.
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view unlockRedraw.
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] ifFalse:[
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super buttonRelease:button x:x y:y
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]
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!
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buttonPress:button x:bx y:by
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"button was pressed - if it hits a handle, start move"
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|handle barHeight group|
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((button == 1) or:[button == #select]) ifTrue:[
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handle := 1.
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barHeight := view barHeight.
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view handleOriginsDo:[:hPoint |
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|hy|
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hy := hPoint y.
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(by between:hy and:(hy + barHeight)) ifTrue:[
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movedHandle := handle.
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prev := hy.
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start := by - hy.
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view invertHandleBarAtX:0 y:hy.
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(group := view windowGroup) notNil ifTrue:[
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group showCursor:view cursor
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].
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^ self
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].
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handle := handle + 1
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].
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movedHandle := nil
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] ifFalse:[
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super buttonPress:button x:bx y:by
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]
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! !
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