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
|
/*******************************************************************************
* Copyright (c) 2000, 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
* Scott Kovatch - interface to apple.awt.CHIViewEmbeddedFrame
*******************************************************************************/
package org.eclipse.swt.awt;
import java.awt.Canvas;
import java.awt.EventQueue;
import java.awt.Frame;
import java.awt.Toolkit;
import java.lang.reflect.Constructor;
import java.lang.reflect.Method;
import org.eclipse.swt.SWT;
import org.eclipse.swt.internal.Library;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
/**
* This class provides a bridge between SWT and AWT, so that it
* is possible to embed AWT components in SWT and vice versa.
*
* @see <a href="http://www.eclipse.org/swt/snippets/#awt">Swing/AWT snippets</a>
* @see <a href="http://www.eclipse.org/swt/">Sample code and further information</a>
*
* @since 3.0
*/
public class SWT_AWT {
/**
* The name of the embedded Frame class. The default class name
* for the platform will be used if <code>null</code>.
*/
public static String embeddedFrameClass;
/**
* Key for looking up the embedded frame for a Composite using
* getData().
*/
static String EMBEDDED_FRAME_KEY = "org.eclipse.swt.awt.SWT_AWT.embeddedFrame";
static {
System.setProperty("apple.awt.usingSWT", "true");
}
static boolean loaded, swingInitialized;
static native final int /*long*/ getAWTHandle (Canvas canvas);
static synchronized void loadLibrary () {
if (loaded) return;
loaded = true;
Toolkit.getDefaultToolkit();
/*
* Note that the jawt library is loaded explicitly
* because it cannot be found by the library loader.
* All exceptions are caught because the library may
* have been loaded already.
*/
try {
System.loadLibrary("jawt");
} catch (Throwable e) {}
Library.loadLibrary("swt-awt");
}
static synchronized void initializeSwing() {
if (swingInitialized) return;
swingInitialized = true;
try {
/* Initialize the default focus traversal policy */
Class[] emptyClass = new Class[0];
Object[] emptyObject = new Object[0];
Class clazz = Class.forName("javax.swing.UIManager");
Method method = clazz.getMethod("getDefaults", emptyClass);
if (method != null) method.invoke(clazz, emptyObject);
} catch (Throwable e) {}
}
/**
* Returns a <code>java.awt.Frame</code> which is the embedded frame
* associated with the specified composite.
*
* @param parent the parent <code>Composite</code> of the <code>java.awt.Frame</code>
* @return a <code>java.awt.Frame</code> the embedded frame or <code>null</code>.
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* </ul>
*
* @since 3.2
*/
public static Frame getFrame(Composite parent) {
if (parent == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if ((parent.getStyle() & SWT.EMBEDDED) == 0) return null;
return (Frame) parent.getData(EMBEDDED_FRAME_KEY);
}
/**
* Creates a new <code>java.awt.Frame</code>. This frame is the root for
* the AWT components that will be embedded within the composite. In order
* for the embedding to succeed, the composite must have been created
* with the SWT.EMBEDDED style.
* <p>
* IMPORTANT: As of JDK1.5, the embedded frame does not receive mouse events.
* When a lightweight component is added as a child of the embedded frame,
* the cursor does not change. In order to work around both these problems, it is
* strongly recommended that a heavyweight component such as <code>java.awt.Panel</code>
* be added to the frame as the root of all components.
* </p>
*
* @param parent the parent <code>Composite</code> of the new <code>java.awt.Frame</code>
* @return a <code>java.awt.Frame</code> to be the parent of the embedded AWT components
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the parent Composite does not have the SWT.EMBEDDED style</li>
* </ul>
*
* @since 3.0
*/
public static Frame new_Frame(final Composite parent) {
if (parent == null) SWT.error(SWT.ERROR_NULL_ARGUMENT);
if ((parent.getStyle() & SWT.EMBEDDED) == 0) {
SWT.error(SWT.ERROR_INVALID_ARGUMENT);
}
final int /*long*/ handle = parent.view.id;
Class clazz = null;
try {
String className = embeddedFrameClass != null ? embeddedFrameClass : "apple.awt.CEmbeddedFrame";
if (embeddedFrameClass == null) {
clazz = Class.forName(className, true, ClassLoader.getSystemClassLoader());
} else {
clazz = Class.forName(className);
}
} catch (ClassNotFoundException cne) {
SWT.error (SWT.ERROR_NOT_IMPLEMENTED, cne);
} catch (Throwable e) {
SWT.error (SWT.ERROR_UNSPECIFIED , e, " [Error while starting AWT]");
}
Object value = null;
Constructor constructor = null;
try {
constructor = clazz.getConstructor (new Class [] {long.class});
value = constructor.newInstance (new Object [] {new Long(handle)});
} catch (Throwable e) {
SWT.error(SWT.ERROR_NOT_IMPLEMENTED, e);
}
final Frame frame = (Frame) value;
parent.setData(EMBEDDED_FRAME_KEY, frame);
Listener listener = new Listener() {
public void handleEvent(Event e) {
switch (e.type) {
case SWT.Dispose: {
parent.setVisible(false);
EventQueue.invokeLater(new Runnable () {
public void run () {
frame.dispose ();
}
});
break;
}
}
}
};
parent.addListener(SWT.Dispose, listener);
return frame;
}
/**
* Creates a new <code>Shell</code>. This Shell is the root for
* the SWT widgets that will be embedded within the AWT canvas.
*
* @param display the display for the new Shell
* @param parent the parent <code>java.awt.Canvas</code> of the new Shell
* @return a <code>Shell</code> to be the parent of the embedded SWT widgets
*
* @exception IllegalArgumentException <ul>
* <li>ERROR_NULL_ARGUMENT - if the display is null</li>
* <li>ERROR_NULL_ARGUMENT - if the parent is null</li>
* <li>ERROR_INVALID_ARGUMENT - if the parent's peer is not created</li>
* </ul>
*
* @since 3.0
*/
public static Shell new_Shell(final Display display, final Canvas parent) {
if (display == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
if (parent == null) SWT.error (SWT.ERROR_NULL_ARGUMENT);
SWT.error(SWT.ERROR_NOT_IMPLEMENTED);
return null;
// TODO: Uncomment this code once Display/Shell related issues are ironed out.
// int /*long*/ handle = 0;
//
// try {
// loadLibrary ();
// handle = getAWTHandle (parent);
// } catch (Throwable e) {
// SWT.error (SWT.ERROR_NOT_IMPLEMENTED, e);
// }
// if (handle == 0) SWT.error (SWT.ERROR_INVALID_ARGUMENT, null, " [peer not created]");
//
// final Shell shell = Shell.cocoa_new (display, handle);
// final ComponentListener listener = new ComponentAdapter () {
// public void componentResized (ComponentEvent e) {
// display.asyncExec (new Runnable () {
// public void run () {
// if (shell.isDisposed()) return;
// Dimension dim = parent.getSize ();
// shell.setSize (dim.width, dim.height);
// }
// });
// }
// };
// parent.addComponentListener(listener);
// shell.addListener(SWT.Dispose, new Listener() {
// public void handleEvent(Event event) {
// parent.removeComponentListener(listener);
// }
// });
// shell.setVisible (true);
// return shell;
}
}
|
