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1991-09-12
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5KB
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183 lines
"======================================================================
|
| Copyright (C) 1990, 1991 Free Software Foundation, Inc.
| Written by Steve Byrne.
|
| This file is part of GNU Smalltalk.
|
| GNU Smalltalk is free software; you can redistribute it and/or modify it
| under the terms of the GNU General Public License as published by the Free
| Software Foundation; either version 1, or (at your option) any later version.
|
| GNU Smalltalk is distributed in the hope that it will be useful, but WITHOUT
| ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
| FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
| details.
|
| You should have received a copy of the GNU General Public License along with
| GNU Smalltalk; see the file COPYING. If not, write to the Free Software
| Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
|
======================================================================"
"
| Change Log
| ============================================================================
| Author Date Change
| sbyrne 24 May 90 created.
|
"
!GC class methodsFor: 'instance creation'!
new: aDisplay drawable: aDrawable
^super new init: aDisplay drawable: aDrawable
!!
!GC methodsFor: 'X hacking'!
changeGC: aBlock
| packet gc |
packet _ XGCAttrPacket command: 56.
packet long: self id.
aBlock notNil
ifTrue: [ aBlock value: packet ]
ifFalse: [ packet noBits ].
display socket bytes: packet done.
!
polyPoint: pointsVec coordMode: coordMode
| packet |
packet _ XPacket command: 64
aux: (X map: coordMode into: #(Origin Previous)).
packet long: drawable id; long: self id.
pointsVec do: [ :point | packet point: point ].
display socket bytes: packet done
!
polyLine: pointsVec coordMode: coordMode
| packet |
packet _ XPacket command: 65
aux: (X map: coordMode into: #(Origin Previous)).
packet long: drawable id; long: self id.
pointsVec do: [ :point | packet point: point ].
display socket bytes: packet done
!
polyLine: aPoint to: otherPoint coordMode: coordMode
| packet |
self polyLine: (Array with: aPoint with: otherPoint)
coordMode: coordMode
!
polySegment: segmentVec
| packet |
packet _ XPacket command: 66. "segments are currently implemented using rectangles"
packet long: drawable id; long: self id.
segmentVec do: [ :seg | packet rectangle: seg ].
display socket bytes: packet done
!
polyRectangle: rectangleVec
| packet |
(rectangleVec isMemberOf: Rectangle) "ugh"
ifTrue: [ rectangleVec _ Array with: rectangleVec ].
packet _ XPacket command: 67.
packet long: drawable id; long: self id.
rectangleVec do: [ :rect | packet point: rect origin.
packet point: rect extent ].
display socket bytes: packet done
!
polyArc: arcs
| packet |
packet _ XPacket command: 68.
packet long: drawable id; long: self id.
arcs do: [ :arc | packet arc: arc ].
display socket bytes: packet done
!
"fillPoly"
polyFillRectangle: rectangles
| packet |
packet _ XPacket command: 70.
packet long: drawable id; long: self id.
rectangles do: [ :rect | packet rectangle: rect ].
display socket bytes: packet done
!
" ... "
polyText8: textItems x: x y: y
| packet |
packet _ XPacket command: 74.
packet long: drawable id; long: self id; word: x; word: y.
textItems do: [ :textItem | packet textItem: textItem ].
display socket bytes: packet done
!!
!GC methodsFor: 'accessing'!
id
^id
!!
!GC methodsFor: 'example class'!
drawExampleImage: button
self polyText8: (Array with: (TextItem onString: 'Welcome to ')
with: (TextItem onString: Version ))
x: 50 y: 30.
self polyLine: 20@20 to: 40@40 coordMode: #Origin.
self polyLine: 40@20 to: 20@40 coordMode: #Origin.
self polyRectangle: (Array with: (10 @ 10 corner: (400 - 20) @ (200 - 20))).
self drawExampleButton: button.
" self polyFillRectangle: (Array with: (10 @ 10 corner: 50 @ 50))."
self polyArc: (Array with: (Arc new: 10 @ 10 size: 40 @ 40 angles: (90*64) @ (180*64))).
self polyArc: (Array with: (Arc new: 10 @ 50 size: 40 @ 40 angles: (270*64) @ (180*64)))
!
drawExampleButton: button
| textStart |
self polyRectangle: (Array with: button).
textStart _ button leftCenter.
self polyText8: (Array with: (TextItem onString: 'Click here to exit'))
x: textStart x + 10 y: textStart y
!!
!GC methodsFor: 'private'!
init: aDisplay drawable: aDrawable
display _ aDisplay.
drawable _ aDrawable.
id _ display nextId.
Registry at: id put: self
!!