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 
QtImageGraphics(Image image)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    */
QtImageGraphics( QtImageGraphics g )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 
dispose()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    */
create()115   public Graphics create()
116   {
117     return new QtImageGraphics( this );
118   }
119 
120   /**
121    * Copy an area.
122    */
copyArea(int x, int y, int width, int height, int dx, int dy)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    */
getDeviceConfiguration()135   public GraphicsConfiguration getDeviceConfiguration()
136   {
137     throw new UnsupportedOperationException("Not implemented yet");
138   }
139 }
140