1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
|
/* CellRendererPane.java --
Copyright (C) 2002, 2004, 2006, Free Software Foundation, Inc.
This file is part of GNU Classpath.
GNU Classpath is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU Classpath is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU Classpath; see the file COPYING. If not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
02110-1301 USA.
Linking this library statically or dynamically with other modules is
making a combined work based on this library. Thus, the terms and
conditions of the GNU General Public License cover the whole
combination.
As a special exception, the copyright holders of this library give you
permission to link this library with independent modules to produce an
executable, regardless of the license terms of these independent
modules, and to copy and distribute the resulting executable under
terms of your choice, provided that you also meet, for each linked
independent module, the terms and conditions of the license of that
module. An independent module is a module which is not derived from
or based on this library. If you modify this library, you may extend
this exception to your version of the library, but you are not
obligated to do so. If you do not wish to do so, delete this
exception statement from your version. */
package javax.swing;
import java.awt.Component;
import java.awt.Container;
import java.awt.Graphics;
import java.awt.Rectangle;
import javax.accessibility.Accessible;
import javax.accessibility.AccessibleContext;
import javax.accessibility.AccessibleRole;
/**
* Paints the cells of JList, JTable and JTree.
* It intercepts the usual paint tree, so that we don't walk up and
* repaint everything.
*
* @author Andrew Selkirk
*/
public class CellRendererPane extends Container implements Accessible
{
private static final long serialVersionUID = -7642183829532984273L;
/**
* Provides accessibility support for CellRendererPanes.
*/
protected class AccessibleCellRendererPane extends AccessibleAWTContainer
{
private static final long serialVersionUID = -8981090083147391074L;
/**
* Constructor AccessibleCellRendererPane
*/
protected AccessibleCellRendererPane()
{
// Nothing to do here.
}
/**
* getAccessibleRole
* @return AccessibleRole
*/
public AccessibleRole getAccessibleRole()
{
return AccessibleRole.PANEL;
}
}
/**
* accessibleContext
*/
protected AccessibleContext accessibleContext = null;
/**
* Constructs a new CellRendererPane.
*/
public CellRendererPane()
{
setVisible(false);
}
/**
* Should not be called.
*
* @param graphics not used here
*/
public void update(Graphics graphics)
{
//Nothing to do here.
}
/**
* Despite normal behaviour this does <em>not</em> cause the container
* to be invalidated. This prevents propagating up the paint tree.
*/
public void invalidate()
{
// Overridden to do nothing.
}
/**
* Should not be called.
*
* @param graphics not used here
*/
public void paint(Graphics graphics)
{
// Overridden to do nothing.
}
/**
* Overridden to check if a component is already a child of this Container.
* If it's already a child, nothing is done. Otherwise we pass this to
* <code>super.addImpl()</code>.
*
* @param c the component to add
* @param constraints not used here
* @param index not used here
*/
protected void addImpl(Component c, Object constraints, int index)
{
if (!isAncestorOf(c))
{
super.addImpl(c, constraints, index);
}
}
/**
* Paints the specified component <code>c</code> on the {@link Graphics}
* context <code>graphics</code>. The Graphics context is tranlated to
* (x,y) and the components bounds are set to (w,h). If
* <code>shouldValidate</code>
* is set to true, then the component is validated before painting.
*
* @param graphics the graphics context to paint on
* @param c the component to be painted
* @param p the parent of the component
* @param x the X coordinate of the upper left corner where c should
be painted
* @param y the Y coordinate of the upper left corner where c should
be painted
* @param w the width of the components drawing area
* @param h the height of the components drawing area
* @param shouldValidate if <code>c</code> should be validated before
* painting
*/
public void paintComponent(Graphics graphics, Component c,
Container p, int x, int y, int w, int h,
boolean shouldValidate)
{
// reparent c
addImpl(c, null, 0);
Rectangle oldClip = graphics.getClipBounds();
boolean translated = false;
try
{
// translate to (x,y)
graphics.translate(x, y);
translated = true;
graphics.clipRect(0, 0, w, h);
// set bounds of c
c.setBounds(0, 0, w, h);
// validate if necessary
if (shouldValidate)
{
c.validate();
}
// paint component
c.paint(graphics);
}
finally
{
// untranslate g
if (translated)
graphics.translate(-x, -y);
graphics.setClip(oldClip);
}
}
/**
* Paints the specified component <code>c</code> on the {@link Graphics}
* context <code>graphics</code>. The Graphics context is tranlated to (x,y)
* and the components bounds are set to (w,h). The component is <em>not</em>
* validated before painting.
*
* @param graphics the graphics context to paint on
* @param c the component to be painted
* @param p the parent of the component
* @param x the X coordinate of the upper left corner where c should
be painted
* @param y the Y coordinate of the upper left corner where c should
be painted
* @param w the width of the components drawing area
* @param h the height of the components drawing area
*/
public void paintComponent(Graphics graphics, Component c,
Container p, int x, int y, int w, int h)
{
paintComponent(graphics, c, p, x, y, w, h, false);
}
/**
* Paints the specified component <code>c</code> on the {@link Graphics}
* context <code>g</code>. The Graphics context is tranlated to (r.x,r.y) and
* the components bounds are set to (r.width,r.height).
* The component is <em>not</em>
* validated before painting.
*
* @param graphics the graphics context to paint on
* @param c the component to be painted
* @param p the component on which we paint
* @param r the bounding rectangle of c
*/
public void paintComponent(Graphics graphics, Component c,
Container p, Rectangle r)
{
paintComponent(graphics, c, p, r.x, r.y, r.width, r.height);
}
/**
* getAccessibleContext <em>TODO</em>
* @return AccessibleContext
*/
public AccessibleContext getAccessibleContext()
{
if (accessibleContext == null)
accessibleContext = new AccessibleCellRendererPane();
return accessibleContext;
}
}
|
