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

   1: /* QtImageGraphics.java --
   2:    Copyright (C)  2005, 2006  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.Image;
  44: import java.awt.Rectangle;
  45: import java.util.Stack;
  46: 
  47: /**
  48:  * QtComponentPainter is a Graphics2D context for painting to QtImage and
  49:  * QtVolatileImages.
  50:  */
  51: public class QtImageGraphics extends QtGraphics
  52: {
  53:   Image parentImage;
  54:   Stack owners;
  55:   QtImageGraphics topParent;
  56: 
  57:   public QtImageGraphics(Image image)
  58:   {
  59:     if(!( image instanceof QtVolatileImage || image instanceof QtImage))
  60:       throw new IllegalArgumentException("Cannot create QtImageGraphics for a non-QImage context.");
  61: 
  62:     owners = new Stack();
  63:     owners.push(this);
  64:     topParent = null;
  65:     int w, h;
  66:     if(image instanceof QtImage)
  67:       {
  68:         w = ((QtImage)image).width;
  69:         h = ((QtImage)image).height;
  70:         initImage((QtImage) image );
  71:         ((QtImage)image).putPainter( this );
  72:       }
  73:     else
  74:       {
  75:         w = ((QtVolatileImage)image).width;
  76:         h = ((QtVolatileImage)image).height;
  77:         initVolatileImage((QtVolatileImage) image );
  78:         ((QtVolatileImage)image).putPainter( this );
  79:       }
  80: 
  81:     parentImage = image;
  82:     initialClip = new Rectangle( 0, 0, w, h );
  83:     setClip( initialClip );
  84:     setBackground(Color.white); // fixme
  85:     currentAlpha = 1.0;
  86:     setColor(Color.black);
  87:     setup();
  88:   }
  89: 
  90:   /**
  91:    * Copying constructor
  92:    */
  93:   QtImageGraphics( QtImageGraphics g )
  94:   {
  95:     super( g );
  96:     parentImage = g.parentImage;
  97:     if(parentImage instanceof QtImage)
  98:       ((QtImage)parentImage).putPainter( this );
  99:     else
 100:       ((QtVolatileImage)parentImage).putPainter( this );
 101:   }
 102: 
 103:   public void dispose()
 104:   {
 105:     delete();
 106:     if( parentImage instanceof QtImage )
 107:       ((QtImage)parentImage).removePainter( this );
 108:     else
 109:       ((QtVolatileImage)parentImage).removePainter( this );
 110:   }
 111: 
 112:   /**
 113:    * Create a copy of this context.
 114:    */
 115:   public Graphics create()
 116:   {
 117:     return new QtImageGraphics( this );
 118:   }
 119: 
 120:   /**
 121:    * Copy an area.
 122:    */
 123:   public void copyArea(int x, int y, int width, int height,
 124:                        int dx, int dy)
 125:   {
 126:     if(parentImage instanceof QtImage)
 127:       ((QtImage)parentImage).copyArea(x, y, width, height, dx, dy);
 128:     else
 129:       ((QtVolatileImage)parentImage).copyArea(x, y, width, height, dx, dy);
 130:   }
 131: 
 132:   /**
 133:    * Returns the GraphicsConfiguration of the context component.
 134:    */
 135:   public GraphicsConfiguration getDeviceConfiguration()
 136:   {
 137:     throw new UnsupportedOperationException("Not implemented yet");
 138:   }
 139: }