gomp-20050608-branch/libjava/classpath/gnu/java/awt/peer/qt/QtComponentGraphics.java

   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
 124