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

   1: /* QtComponentGraphics.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.Rectangle;
  45: import java.awt.Paint;
  46: 
  47: /**
  48:  * QtComponentPainter is a Graphics2D context for painting directly to AWT 
  49:  * components. They require an existing QPainter object (the one passed into 
  50:  * the native paint method), and are created there (ONLY).
  51:  *
  52:  * Since this context does direct on-screen drawing it is NOT thread-safe,
  53:  * and should NOT be used outside the thread in which it was created.
  54:  *
  55:  * In other words,
  56:  * this is intended for use by QtComponentPeer.paintEvent() only.
  57:  *
  58:  */
  59: public class QtComponentGraphics extends QtGraphics
  60: {
  61:   private QtComponentPeer peer;
  62: 
  63:   /**
  64:    * Creates a new ComponentGraphics from an *existing* QPainter object.
  65:    *
  66:    * @param ptr the pointer to the QPainter object.
  67:    */
  68:   public QtComponentGraphics(long ptr, QtComponentPeer component, 
  69:                  int x, int y, int w, int h)
  70:   {
  71:     nativeObject = ptr;
  72:     peer = component;
  73: 
  74:     Rectangle r = new Rectangle(x, y, w, h);
  75:     initialClip = r;
  76:     
  77:     setAlpha( 1.0 );
  78:     Color c = component.owner.getBackground();
  79:     if(c == null)
  80:       setBackground(Color.white);
  81:     else
  82:       setBackground( c );
  83: 
  84:     c = component.owner.getForeground();
  85:     if(c == null)
  86:       setColor( Color.black );
  87:     else
  88:       setColor( c );
  89:     setup();
  90:     setClip( initialClip );
  91:   }
  92: 
  93:   /**
  94:    * Copying constructor
  95:    */
  96:   QtComponentGraphics( QtComponentGraphics g )
  97:   {
  98:     super( g ); // Slalom is fun
  99:   }
 100: 
 101:   public Graphics create()
 102:   {
 103:     return new QtComponentGraphics( this );
 104:   }
 105: 
 106:   /**
 107:    * This is a tricky one
 108:    */ 
 109:   public void copyArea(int x, int y, int width, int height, 
 110:                int dx, int dy)
 111:   {
 112:     // FIXME 
 113:   }
 114: 
 115:   /**
 116:    * Returns the GraphicsConfiguration of the context component.
 117:    */
 118:   public GraphicsConfiguration getDeviceConfiguration()
 119:   {
 120:     return peer.getGraphicsConfiguration();
 121:   }
 122: } 
 123: