/*******************************************************************************
* Copyright (c) 2000, 2004 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
*******************************************************************************/
package org.eclipse.swt.snippets;
/*
* Browser example snippet: call Java from JavaScript.
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.5
*/
import org.eclipse.swt.*;
import org.eclipse.swt.browser.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;
public class Snippet307 {
public static void main (String [] args) {
Display display = new Display ();
Shell shell = new Shell (display);
shell.setLayout (new FillLayout ());
shell.setBounds (10,10,300,200);
final Browser browser;
try {
browser = new Browser (shell, SWT.NONE);
} catch (SWTError e) {
System.out.println ("Could not instantiate Browser: " + e.getMessage ());
display.dispose();
return;
}
browser.setText (createHTML ());
final BrowserFunction function = new CustomFunction (browser, "theJavaFunction");
browser.addProgressListener (new ProgressAdapter () {
public void completed (ProgressEvent event) {
browser.addLocationListener (new LocationAdapter () {
public void changed (LocationEvent event) {
browser.removeLocationListener (this);
System.out.println ("left java function-aware page, so disposed CustomFunction");
function.dispose ();
}
});
}
});
shell.open ();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ())
display.sleep ();
}
display.dispose ();
}
static class CustomFunction extends BrowserFunction {
CustomFunction (Browser browser, String name) {
super (browser, name);
}
public Object function (Object[] arguments) {
System.out.println ("theJavaFunction() called from javascript with args:");
for (int i = 0; i < arguments.length; i++) {
Object arg = arguments[i];
if (arg == null) {
System.out.println ("\t-->null");
} else {
System.out.println ("\t-->" + arg.getClass ().getName () + ": " + arg.toString ());
}
}
Object returnValue = new Object[] {
new Short ((short)3),
new Boolean (true),
null,
new Object[] {"a string", new Boolean (false)},
"hi",
new Float (2.0f / 3.0f),
};
//int z = 3 / 0; // uncomment to cause a java error instead
return returnValue;
}
}
static String createHTML () {
StringBuffer buffer = new StringBuffer ();
buffer.append ("\n");
buffer.append ("\n");
buffer.append ("\n");
buffer.append ("\n");
buffer.append ("\n");
buffer.append ("\n");
buffer.append ("
go to eclipse.org\n");
buffer.append ("\n");
buffer.append ("\n");
return buffer.toString ();
}
}