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COPYRIGHT (c) 1990-93 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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StandardSystemView subclass:#ModalBox
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instanceVariableNames:'haveControl shadowView'
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classVariableNames:'PopShadow'
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poolDictionaries:''
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category:'Views-Basic'
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!
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ModalBox comment:'
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COPYRIGHT (c) 1990-93 by Claus Gittinger
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All Rights Reserved
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2
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%W% %E%
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written Jan 90 by claus
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'!
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!ModalBox class methodsFor:'documentation'!
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documentation
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"
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this class implements modal boxes; ModalBoxes are different from
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others, in that they take complete control over the display, until
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all processing is done (i.e. other views will not get any events
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while the box is active).
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0
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class variables:
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PopShadow <Boolean> if true, modalBoxes will show a shadow
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2
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"
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! !
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!ModalBox class methodsFor:'initialization'!
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initialize
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super initialize.
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PopShadow := self classResources name:'POPUP_SHADOW' default:false
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! !
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0
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!ModalBox class methodsFor:'instance creation'!
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new
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^ super on:ModalDisplay
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! !
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!ModalBox methodsFor:'initialize / release'!
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initialize
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super initialize.
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haveControl := false.
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self is3D ifTrue:[
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borderWidth := 0.
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self level:2
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].
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2
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PopShadow ifTrue:[
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shadowView := (ShadowView on:device) for:self
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]
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!
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initEvents
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super initEvents.
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self enableKeyEvents
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addToCurrentProject
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"ignored here"
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^ self
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!
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destroy
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super destroy.
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shadowView notNil ifTrue:[shadowView destroy]
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!
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create
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super create.
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PopShadow ifFalse:[
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self saveUnder:true
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]
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!
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createOnTop
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^ true
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! !
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!ModalBox methodsFor:'show / hide'!
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mapped
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"wait till visible for grabbing"
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super mapped.
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device grabKeyboardIn:drawableId.
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device setInputFocusTo:drawableId.
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show
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"make myself visible and take control"
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self fixSize.
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shadowView notNil ifTrue:[shadowView realize].
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self raise.
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self realize.
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self takeControl
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!
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showAt:aPoint
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self origin:aPoint.
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((top + height) > (device height)) ifTrue:[
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self top:(device height - height)
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].
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((left + width) > (device width)) ifTrue:[
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self left:(device width - width)
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].
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(top < 0) ifTrue:[
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self top:0
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].
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(left < 0) ifTrue:[
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self left:0
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].
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self show
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!
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showAtPointer
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self showAt:(device pointerPosition - ((width // 2) @ (height // 2)))
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!
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showAtPointerNotCovering:aView
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|x y|
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x := device pointerPosition x - (width // 2).
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y := device pointerPosition y - (height // 2).
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(((x @ y) corner:((x + width) @ (y + height))) intersects:
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(aView origin corner: aView corner)) ifTrue:[
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x := aView origin x + aView width
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].
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self showAt:(x @ y)
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!
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hide
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"make myself invisible and leave control"
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self unrealize.
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device synchronizeOutput.
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shadowView notNil ifTrue:[shadowView unrealize].
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self leaveControl.
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! !
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!ModalBox methodsFor:'private'!
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takeControl
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haveControl := true.
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"
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device grabKeyboardIn:drawableId.
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device setInputFocusTo:drawableId.
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"
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"this is a kludge - we do not have multiple processes, therefore
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we start another dispatch loop, which exits when control is lost"
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device dispatchWhile:[haveControl]
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!
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leaveControl
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haveControl := false.
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device ungrabKeyboard
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! !
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