Source for gnu.java.awt.peer.qt.QtImageGraphics

   1: /* QtImageGraphics.java --
   2:    Copyright (C)  2005  Free Software Foundation, Inc.
   3: 
   4: This file is part of GNU Classpath.
   5: 
   6: GNU Classpath is free software; you can redistribute it and/or modify
   7: it under the terms of the GNU General Public License as published by
   8: the Free Software Foundation; either version 2, or (at your option)
   9: any later version.
  10: 
  11: GNU Classpath is distributed in the hope that it will be useful, but
  12: WITHOUT ANY WARRANTY; without even the implied warranty of
  13: MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14: General Public License for more details.
  15: 
  16: You should have received a copy of the GNU General Public License
  17: along with GNU Classpath; see the file COPYING.  If not, write to the
  18: Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
  19: 02110-1301 USA.
  20: 
  21: Linking this library statically or dynamically with other modules is
  22: making a combined work based on this library.  Thus, the terms and
  23: conditions of the GNU General Public License cover the whole
  24: combination.
  25: 
  26: As a special exception, the copyright holders of this library give you
  27: permission to link this library with independent modules to produce an
  28: executable, regardless of the license terms of these independent
  29: modules, and to copy and distribute the resulting executable under
  30: terms of your choice, provided that you also meet, for each linked
  31: independent module, the terms and conditions of the license of that
  32: module.  An independent module is a module which is not derived from
  33: or based on this library.  If you modify this library, you may extend
  34: this exception to your version of the library, but you are not
  35: obligated to do so.  If you do not wish to do so, delete this
  36: exception statement from your version. */
  37: 
  38: package gnu.java.awt.peer.qt;
  39: 
  40: import java.awt.Color;
  41: import java.awt.GraphicsConfiguration;
  42: import java.awt.Graphics;
  43: import java.awt.Graphics2D;
  44: import java.awt.Image;
  45: import java.awt.Paint;
  46: import java.awt.Rectangle;
  47: import java.util.Stack;
  48: 
  49: /**
  50:  * QtComponentPainter is a Graphics2D context for painting to QtImage and
  51:  * QtVolatileImages.
  52:  */
  53: public class QtImageGraphics extends QtGraphics
  54: {
  55:   Image parentImage;
  56:   Stack owners;
  57:   QtImageGraphics topParent;
  58: 
  59:   public QtImageGraphics(Image image)
  60:   {
  61:     if(!( image instanceof QtVolatileImage || image instanceof QtImage))
  62:       throw new IllegalArgumentException("Cannot create QtImageGraphics for a non-QImage context.");
  63: 
  64:     owners = new Stack();
  65:     owners.push(this);
  66:     topParent = null;
  67:     int w, h;
  68:     if(image instanceof QtImage)
  69:       {
  70:     w = ((QtImage)image).width; 
  71:     h = ((QtImage)image).height; 
  72:     initImage((QtImage) image );
  73:     ((QtImage)image).putPainter( this );
  74:       } 
  75:     else
  76:       {
  77:     w = ((QtVolatileImage)image).width; 
  78:     h = ((QtVolatileImage)image).height; 
  79:     initVolatileImage((QtVolatileImage) image );
  80:     ((QtVolatileImage)image).putPainter( this );
  81:       }
  82: 
  83:     parentImage = image;
  84:     initialClip = new Rectangle( 0, 0, w, h );
  85:     setClip( initialClip );
  86:     setBackground(Color.white); // fixme
  87:     currentAlpha = 1.0;
  88:     setColor(Color.black);
  89:     setup();
  90:   }
  91: 
  92:   /**
  93:    * Copying constructor
  94:    */
  95:   QtImageGraphics( QtImageGraphics g )
  96:   {
  97:     super( g ); 
  98:     parentImage = g.parentImage;
  99:     if(parentImage instanceof QtImage)
 100:       ((QtImage)parentImage).putPainter( this );
 101:     else
 102:       ((QtVolatileImage)parentImage).putPainter( this );
 103:   }
 104: 
 105:   public void dispose()
 106:   {
 107:     delete();
 108:     if( parentImage instanceof QtImage )
 109:       ((QtImage)parentImage).removePainter( this );
 110:     else
 111:       ((QtVolatileImage)parentImage).removePainter( this );
 112:   }
 113: 
 114:   /**
 115:    * Create a copy of this context.
 116:    */
 117:   public Graphics create()
 118:   {
 119:     return new QtImageGraphics( this );
 120:   }
 121: 
 122:   /**
 123:    * Copy an area.
 124:    */ 
 125:   public void copyArea(int x, int y, int width, int height, 
 126:                int dx, int dy)
 127:   {
 128:     if(parentImage instanceof QtImage)
 129:       ((QtImage)parentImage).copyArea(x, y, width, height, dx, dy);
 130:     else
 131:       ((QtVolatileImage)parentImage).copyArea(x, y, width, height, dx, dy);
 132:   }
 133: 
 134:   /**
 135:    * Returns the GraphicsConfiguration of the context component.
 136:    */
 137:   public GraphicsConfiguration getDeviceConfiguration()
 138:   {
 139:     throw new UnsupportedOperationException("Not implemented yet");
 140:   }
 141: } 
 142: