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

   1: /* QtComponentGraphics.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.Rectangle;
  44: 
  45: /**
  46:  * QtComponentPainter is a Graphics2D context for painting directly to AWT
  47:  * components. They require an existing QPainter object (the one passed into
  48:  * the native paint method), and are created there (ONLY).
  49:  *
  50:  * Since this context does direct on-screen drawing it is NOT thread-safe,
  51:  * and should NOT be used outside the thread in which it was created.
  52:  *
  53:  * In other words,
  54:  * this is intended for use by QtComponentPeer.paintEvent() only.
  55:  *
  56:  */
  57: public class QtComponentGraphics extends QtGraphics
  58: {
  59:   private QtComponentPeer peer;
  60: 
  61:   /**
  62:    * Creates a new ComponentGraphics from an *existing* QPainter object.
  63:    *
  64:    * @param ptr the pointer to the QPainter object.
  65:    */
  66:   public QtComponentGraphics(long ptr, QtComponentPeer component,
  67:                              int x, int y, int w, int h)
  68:   {
  69:     nativeObject = ptr;
  70:     peer = component;
  71: 
  72:     Rectangle r = new Rectangle(x, y, w, h);
  73:     initialClip = r;
  74: 
  75:     setAlpha( 1.0 );
  76:     Color c = component.owner.getBackground();
  77:     if(c == null)
  78:       setBackground(Color.white);
  79:     else
  80:       setBackground( c );
  81: 
  82:     c = component.owner.getForeground();
  83:     if(c == null)
  84:       setColor( Color.black );
  85:     else
  86:       setColor( c );
  87:     setup();
  88:     setClip( initialClip );
  89:   }
  90: 
  91:   /**
  92:    * Copying constructor
  93:    */
  94:   QtComponentGraphics( QtComponentGraphics g )
  95:   {
  96:     super( g ); // Slalom is fun
  97:   }
  98: 
  99:   public Graphics create()
 100:   {
 101:     return new QtComponentGraphics( this );
 102:   }
 103: 
 104:   /**
 105:    * This is a tricky one
 106:    */
 107:   public void copyArea(int x, int y, int width, int height,
 108:                        int dx, int dy)
 109:   {
 110:     // FIXME
 111:   }
 112: 
 113:   /**
 114:    * Returns the GraphicsConfiguration of the context component.
 115:    */
 116:   public GraphicsConfiguration getDeviceConfiguration()
 117:   {
 118:     return peer.getGraphicsConfiguration();
 119:   }
 120: }