"
COPYRIGHT (c) 1989 by Claus Gittinger
All Rights Reserved
This software is furnished under a license and may be used
only in accordance with the terms of that license and with the
inclusion of the above copyright notice. This software may not
be provided or otherwise made available to, or used by, any
other person. No title to or ownership of the software is
hereby transferred.
"
View subclass:#PopUpView
instanceVariableNames:'shadowView haveControl'
classVariableNames:'PopShadow'
poolDictionaries:''
category:'Views-Basic'
!
PopUpView comment:'
COPYRIGHT (c) 1989 by Claus Gittinger
All Rights Reserved
$Header: /cvs/stx/stx/libview/PopUpView.st,v 1.4 1993-10-13 02:44:06 claus Exp $
written spring/summer 89 by claus
'!
Smalltalk at:#ActiveGrab put:nil!
!PopUpView class methodsFor:'documentation'!
documentation
"
this class implements an abstract superclass for all views which bypass the window manager
and pop up on top of the screen. They are usually not decorated by
window managers.
class variables:
PopShadow <Boolean> if true, popupviews show a shadow
"
! !
!PopUpView class methodsFor:'defaults'!
defaultExtent
^ (Display width // 2) @ (Display height // 2)
! !
!PopUpView class methodsFor:'initialization'!
initialize
super initialize.
PopShadow := self classResources name:'POPUP_SHADOW' default:false
! !
!PopUpView methodsFor:'initialization / release'!
initialize
|c|
super initialize.
c := device center.
left := c x - (width // 2).
top := c y - (height // 2).
self is3D ifTrue:[
borderWidth := 0.
self level:2
] ifFalse:[
borderWidth := 1
].
PopShadow ifTrue:[
shadowView := (ShadowView on:device) for:self.
device hasGreyscales ifTrue:[
shadowView paint:(Color darkGrey)
]
].
haveControl := false
!
destroy
haveControl := false.
super destroy.
shadowView notNil ifTrue:[shadowView destroy]
!
create
super create.
PopShadow ifFalse:[
self saveUnder:true
]
! !
!PopUpView methodsFor:'dispatching'!
modalLoop
haveControl := true.
"this is a kludge - we do not have multiple processes, therefore
we start another dispatch loop, which exits when control is lost"
device dispatchFor:nil "drawableId" while:[haveControl]
! !
!PopUpView methodsFor:'private'!
takeControl
^ self.
haveControl := true.
"this is a kludge - we do not have multiple processes, therefore
we start another dispatch loop, which exits when control is lost"
device dispatchFor:drawableId while:[haveControl]
!
leaveControl
haveControl := false
! !
!PopUpView methodsFor:'realize / unrealize'!
mapped
"wait till visible for grabbing"
super mapped.
device grabPointerIn:drawableId.
ActiveGrab := self.
!
realize
shadowView notNil ifTrue:[shadowView realize].
self raise.
super realize.
"get the pointer into my window"
"
device grabPointerIn:drawableId.
ActiveGrab := self.
"
"and handle events for me"
self takeControl
!
unrealize
haveControl := false.
ActiveGrab := nil.
device ungrabPointer.
super unrealize.
shadowView notNil ifTrue:[shadowView unrealize].
! !
!PopUpView methodsFor:'accessing'!
heightIncludingBorder
^ height
!
widthIncludingBorder
^ width
!
createOnTop
^ true
! !