#DOCUMENTATION by mawalch
class: DisplaySurface
comment/format in: #withCursor:do:
"
COPYRIGHT (c) 2009 by Claus Gittinger / eXept Software AG
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.
"
"{ Package: 'stx:libview' }"
"{ NameSpace: Smalltalk }"
AbstractBackground subclass:#ImageBackground
instanceVariableNames:'image align cachedMagnifiedImage'
classVariableNames:''
poolDictionaries:''
category:'Graphics-Support'
!
!ImageBackground class methodsFor:'documentation'!
copyright
"
COPYRIGHT (c) 2009 by Claus Gittinger / eXept Software AG
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.
"
!
examples
"
[exBegin]
|v|
v := View new.
v viewBackground:(ImageBackground new image:(Image fromFile:'~/work/stx/hsv.png')).
v open.
[exEnd]
[exBegin]
|v|
v := View new.
v viewBackground:(ImageBackground new
image:(Image fromFile:'~/work/stx/hsv.png');
align:#fit).
v open.
[exEnd]
"
! !
!ImageBackground methodsFor:'accessing'!
align:something
align := something.
!
image:something
image := something.
! !
!ImageBackground methodsFor:'drawing'!
fillRectangleX:x y:y width:w height:h in:aView
align == #right ifTrue:[
image displayOn:aView x:(aView right - image width) y:0.
^ self
].
align == #center ifTrue:[
image displayOn:aView x:(aView right - image width)//2 y:(aView bottom - image height)//2.
^ self
].
align == #fit ifTrue:[
(cachedMagnifiedImage notNil
and:[ cachedMagnifiedImage width == aView width
and:[ cachedMagnifiedImage height == aView height ]]) ifFalse:[
cachedMagnifiedImage := image magnifiedTo:aView extent.
aView invalidate.
^ self.
].
cachedMagnifiedImage displayOn:aView x:0 y:0.
^ self
].
"/ align == #left
x < image width ifTrue:[
y < image height ifTrue:[
image displayOn:aView x:0 y:0
]
]
! !
!ImageBackground class methodsFor:'documentation'!
version_CVS
^ '$Header$'
! !