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COPYRIGHT (c) 1989-93 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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View subclass:#PopUpView
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instanceVariableNames:'shadowView haveControl'
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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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PopUpView comment:'
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COPYRIGHT (c) 1989-93 by Claus Gittinger
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All Rights Reserved
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%W% %E%
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written spring/summer 89 by claus
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'!
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Smalltalk at:#ActiveGrab put:nil!
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2
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!PopUpView class methodsFor:'documentation'!
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documentation
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"
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this class implements an abstract superclass for all views which bypass the window manager
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and pop up on top of the screen. They are usually not decorated by
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window managers.
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class variables:
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PopShadow <Boolean> if true, popupviews show a shadow
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"
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! !
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!PopUpView class methodsFor:'defaults'!
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defaultExtent
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^ (Display width // 2) @ (Display height // 2)
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! !
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!PopUpView 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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!PopUpView methodsFor:'initialization / release'!
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initialize
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|c|
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super initialize.
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c := device center.
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left := c x - (width // 2).
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top := c y - (height // 2).
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self is3D ifTrue:[
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borderWidth := 0.
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self level:2
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] ifFalse:[
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borderWidth := 1
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].
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PopShadow ifTrue:[
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shadowView := (ShadowView on:device) for:self.
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device hasGreyscales ifTrue:[
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shadowView paint:(Color darkGrey)
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]
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].
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haveControl := false
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!
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destroy
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haveControl := false.
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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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2
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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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!PopUpView methodsFor:'dispatching'!
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modalLoop
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haveControl := true.
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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 dispatchFor:nil "drawableId" while:[haveControl]
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! !
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!PopUpView methodsFor:'private'!
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takeControl
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^ self.
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haveControl := true.
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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 dispatchFor:drawableId while:[haveControl]
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!
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leaveControl
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haveControl := false
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! !
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!PopUpView methodsFor:'realize / unrealize'!
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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 grabPointerIn:drawableId.
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ActiveGrab := self.
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!
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realize
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shadowView notNil ifTrue:[shadowView realize].
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self raise.
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super realize.
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"get the pointer into my window"
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"
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device grabPointerIn:drawableId.
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ActiveGrab := self.
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"
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"and handle events for me"
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self takeControl
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!
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unrealize
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haveControl := false.
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ActiveGrab := nil.
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device ungrabPointer.
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2
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super unrealize.
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shadowView notNil ifTrue:[shadowView unrealize].
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! !
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!PopUpView methodsFor:'accessing'!
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heightIncludingBorder
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^ height
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!
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widthIncludingBorder
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^ width
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!
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createOnTop
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^ true
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! !
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