"
COPYRIGHT (c) 1988 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.
"
PseudoView subclass:#DisplayRootView
instanceVariableNames:''
classVariableNames:''
poolDictionaries:''
category:'Views-Basic'
!
DisplayRootView comment:'
COPYRIGHT (c) 1988 by Claus Gittinger
All Rights Reserved
this class describes Xs rootWindow (which is the background window and
must be used for drawing outside of Views i.e. for dragging between Views)
$Header: /cvs/stx/stx/libview/DisplayRootView.st,v 1.4 1993-10-13 02:43:01 claus Exp $
written spring/summer 89 by claus
'!
Smalltalk at:#RootView put:nil!
!DisplayRootView class methodsFor:'initialization'!
initialize
Display isNil ifTrue:[
Workstation initialize
].
super initialize
! !
!DisplayRootView class methodsFor:'instance creation'!
new
"since there is only one RootView - catch new"
RootView isNil ifTrue:[
RootView := super new
].
^ RootView
! !
!DisplayRootView methodsFor:'initialization'!
initialize
super initialize.
width := device width.
height := device height.
realized := true.
drawableId := device rootWindowFor:self
!
reinitialize
"reinit after snapin"
width := device width.
height := device height.
drawableId := device rootWindowFor:self.
gcId := nil.
! !
!DisplayRootView methodsFor:'accessing'!
name
^ 'RootWindow'
!
controller
^ nil
! !
!DisplayRootView methodsFor:'queries'!
canDrop:anObjectOrCollection
"return true, if anObjectOrCollection can be
dropped in the receiver. This method should be
redefined in views which can take objects"
^ false
!
isWindowManagerRunning
"answer true, if a window manager is currently running.
This is done by performing an action (enabling button events of
root window), which will fail if a winman is running."
|errorOccured|
errorOccured := false.
device class deviceErrorSignal handle:[:ex |
errorOccured := true.
ex return
] do:[
self enableButtonEvents.
device synchronizeOutput.
].
^ errorOccured
! !