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/*******************************************************************************
* 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.lang.reflect.Constructor;
import org.eclipse.swt.SWT;
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");
}
/**
* 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);
}
//TODO - the call to the constructor hangs in nextEventMachingMask:
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;
}
}
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