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"
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COPYRIGHT (c) 1989 by Claus Gittinger
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71
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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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GraphicsContext subclass:#DisplayMedium
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instanceVariableNames:'width height clipRect window'
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classVariableNames:''
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poolDictionaries:''
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category:'Graphics-Support'
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!
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46
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!DisplayMedium class methodsFor:'documentation'!
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copyright
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"
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COPYRIGHT (c) 1989 by Claus Gittinger
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71
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All Rights Reserved
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0
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46
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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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!
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documentation
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"
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this is an abstract superclass for all kinds of drawables which
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have a physical representation (i.e. have an extent). Dont use messages
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from here - it will vanish soon.
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0
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46
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Instance variables:
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width <SmallInteger> the width (device dependent, usually pixels or inches)
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height <SmallInteger> the height (device dependent, usually pixels or inches)
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clipRect <Rectangle> a clip rectangle (device dep. usually pixels or inches)
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"
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! !
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601
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!DisplayMedium methodsFor:'GC access'!
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601
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at:aPoint
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"return pixel value at coordinate"
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157
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601
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^ self subclassResponsibility
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!
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601
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drawPattern:aPattern
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"set the pattern to be drawn with - the pattern may be a color,
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a bitmap or pixmap"
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157
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601
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aPattern isColor ifTrue:[
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self paint:aPattern
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] ifFalse:[
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self mask:aPattern
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]
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157
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!
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601
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gc
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"ST-80 compatibility;
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in STX a displayMedium is its own graphicsContext"
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157
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601
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^ self
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! !
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!DisplayMedium methodsFor:'accessing'!
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601
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bottomCenter
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"return the topCenter point"
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601
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^ (self left + (width//2) - 1) @ (self top + height - 1)
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!
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601
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bottomLeft
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"return the bottomLeft point"
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^ (self left) @ (self top + height - 1)
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!
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center
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"return the point at the center of the receiver"
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^ (self left + (width // 2)) @ (self top + (height // 2))
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!
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corner
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"return the corner point i.e. the bottom-right point"
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^ (self left + width - 1) @ (self top + height - 1)
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!
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corner:aPoint
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"set the corner point i.e. change extent so that corner will be
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aPoint while leaving the origin unchanging "
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self extent:(aPoint x - self left + 1)
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@
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(aPoint y - self top + 1)
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!
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extent
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"return the extent i.e. a point with width as x, height as y
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coordinate"
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171
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601
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^ width @ height
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!
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extent:extent
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"set the extent"
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width := extent x.
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height := extent y
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!
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height
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"return the height of the receiver"
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^ height
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!
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601
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height:anInteger
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"set the height of the receiver"
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height := anInteger
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!
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601
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isView
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"return true, if the receiver is a view"
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601
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^ false
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!
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left
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"return the left i.e. x-coordinate of top-left of the receiver"
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^ 0
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!
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leftCenter
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"return the leftCenter point"
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^ (self left) @ (self top + (height // 2) - 1)
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!
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origin
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"return the origin i.e. coordinate of top-left of the receiver"
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^ 0 @ 0
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!
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171
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rightCenter
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"return the leftCenter point"
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^ (self left + width - 1) @ (self top + (height // 2) - 1)
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601
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!
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setWidth:w height:h
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"set both width and height - not to be redefined"
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width := w.
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height := h
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!
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0
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601
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top
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"return the top i.e. y-coordinate of top-left of the receiver"
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^ 0
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!
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topCenter
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"return the topCenter point"
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0
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601
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^ (self left + (width//2) - 1) @ (self top)
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!
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topRight
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"return the topRight point"
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^ (self left + width - 1) @ (self top)
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!
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180
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601
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width
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"return the width of the receiver"
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^ width
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!
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width:anInteger
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"set the width of the receiver"
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width := anInteger
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!
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601
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width:w height:h
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"set both width and height of the receiver"
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width := w.
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height := h
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! !
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!DisplayMedium methodsFor:'evaluating in another context'!
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601
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clippedTo:aRectangle do:aBlock
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"evaluate aBlock with clipping rectangle set to aRectangle"
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|oldClip|
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oldClip := clipRect.
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self clipRect:aRectangle.
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aBlock value.
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self clipRect:oldClip
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0
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!
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601
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withFunction:aFunction do:aBlock
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"evaluate aBlock with function set to aFunction"
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|oldFun|
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oldFun := function.
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self function:aFunction.
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aBlock value.
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self function:oldFun
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!
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withMask:aMask do:aBlock
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"evaluate aBlock with mask set to aMask"
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|oldMask|
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oldMask := mask.
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self mask:aMask.
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aBlock value.
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self mask:oldMask
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!
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withPattern:aPattern do:aBlock
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|old|
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0
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aPattern isColor ifTrue:[
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old := paint.
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self paint:aPattern.
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aBlock value.
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self paint:old
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0
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] ifFalse:[
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601
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old := mask.
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self mask:aPattern.
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aBlock value.
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self mask:old
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0
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]
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! !
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!DisplayMedium methodsFor:'filling'!
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black
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"fill the receiver with black"
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self fill:Black
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!
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clear
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"clear the receiver with background"
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80
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"currently need this kludge for form ..."
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transformation isNil ifTrue:[
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self clearRectangleX:0 y:0 width:width height:height
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] ifFalse:[
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self clearDeviceRectangleX:0 y:0 width:width height:height
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]
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!
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601
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clearInside
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"clear the receiver with background - ST-80 compatibility"
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^ self clear
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!
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286 |
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0
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clearRectangle:aRectangle
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"clear the rectangular area in the receiver to background"
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self clearRectangleX:(aRectangle left)
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y:(aRectangle top)
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width:(aRectangle width)
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height:(aRectangle height)
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0
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!
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clearRectangleX:left y:top width:w height:h
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"clear the rectangular area in the receiver to background"
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self fillRectangleX:left
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y:top
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width:w
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height:h
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75
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with:bgPaint
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!
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fill:something
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"fill the receiver with something;
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something may be a Form, Color or colorIndex"
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309 |
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self fillRectangleX:0 y:0 width:width height:height with:something
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311 |
!
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312 |
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601
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fillArcX:x y:y w:w h:h from:startAngle angle:angle with:aPattern
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314 |
"fill an arc in the receiver with aPattern,
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which may be a Color or Form"
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self withPattern:aPattern do:[
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self fillArcX:x y:y w:w h:h from:startAngle angle:angle
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]
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!
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fillCircle:aPoint radius:aNumber with:aPattern
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"fill a circle in the receiver with aPattern,
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which may be a Color or Form"
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325 |
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326 |
self fillCircleX:(aPoint x) y:(aPoint y) radius:aNumber with:aPattern
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327 |
!
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328 |
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329 |
fillCircleX:x y:y radius:r with:aPattern
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330 |
"fill a circle with aPattern,
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which may be a Color or Form"
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332 |
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333 |
|d|
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d := 2 * r.
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self fillArcX:(x - r) y:(y - r) w:d h:d from:0 angle:360 with:aPattern
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336 |
!
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337 |
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338 |
fillPolygon:aPolygon with:aPattern
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"fill a polygon in the receiver with aPattern,
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which may be a Form or Color"
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341 |
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342 |
self withPattern:aPattern do:[
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self fillPolygon:aPolygon
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344 |
]
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345 |
!
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346 |
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0
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347 |
fillRectangle:aRectangle with:something
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348 |
"fill the rectangular area in the receiver with something;
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349 |
something may be a Form, Color or colorIndex"
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350 |
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351 |
self fillRectangleX:(aRectangle left)
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71
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352 |
y:(aRectangle top)
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353 |
width:(aRectangle width)
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354 |
height:(aRectangle height)
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355 |
with:something
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0
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356 |
!
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357 |
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358 |
fillRectangleX:x y:y width:w height:h with:aPattern
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359 |
"fill the rectangular area in the receiver with aPattern,
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|
360 |
which may be a Form or Color"
|
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|
361 |
|
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362 |
self withPattern:aPattern do:[
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71
|
363 |
self fillRectangleX:x y:y width:w height:h
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0
|
364 |
]
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71
|
365 |
|
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366 |
"
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157
|
367 |
Display rootView
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|
368 |
fillRectangleX:0
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369 |
y:0
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370 |
width:50
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|
371 |
height:50
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|
372 |
with:(Color grey:50)
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71
|
373 |
"
|
|
0
|
374 |
!
|
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375 |
|
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376 |
invertRectangle:aRectangle
|
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|
377 |
"invert a rectangle in the receiver"
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|
378 |
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|
379 |
self xoring:[
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71
|
380 |
self fillRectangle:aRectangle
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0
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381 |
]
|
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|
382 |
!
|
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|
383 |
|
|
601
|
384 |
white
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|
385 |
"fill the receiver with white"
|
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0
|
386 |
|
|
601
|
387 |
self fill:White
|
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0
|
388 |
! !
|
|
|
389 |
|
|
601
|
390 |
!DisplayMedium methodsFor:'initialization'!
|
|
0
|
391 |
|
|
601
|
392 |
initialize
|
|
|
393 |
"set up some useful default values"
|
|
0
|
394 |
|
|
601
|
395 |
super initialize.
|
|
0
|
396 |
|
|
601
|
397 |
width := 0.
|
|
|
398 |
height := 0
|
|
|
399 |
! !
|
|
0
|
400 |
|
|
601
|
401 |
!DisplayMedium class methodsFor:'documentation'!
|
|
0
|
402 |
|
|
601
|
403 |
version
|
|
|
404 |
^ '$Header: /cvs/stx/stx/libview/Attic/DMedium.st,v 1.15 1996-04-23 20:11:45 cg Exp $'
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|
0
|
405 |
! !
|