/*******************************************************************************
* 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
*******************************************************************************/
package org.eclipse.swt.snippets;
/*
* Take a snapshot of a control
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.4
*/
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;
public class Snippet292 {
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
final Group group = new Group(shell, SWT.NONE);
group.setText("Group");
group.setLayout(new GridLayout());
final Tree tree = new Tree(group, SWT.BORDER);
for (int i = 0; i < 5; i++) {
TreeItem treeItem = new TreeItem (tree, SWT.NONE);
treeItem.setText ("TreeItem " + i);
for (int j = 0; j < 3; j++) {
TreeItem subItem = new TreeItem(treeItem, SWT.NONE);
subItem.setText("SubItem " + i + "-" + j);
}
if (i % 3 == 0) treeItem.setExpanded (true);
}
new Button(group, SWT.PUSH).setText("Button");
final Label label = new Label (shell, SWT.NONE);
label.addListener (SWT.Dispose, new Listener () {
@Override
public void handleEvent (Event e) {
Image image = label.getImage ();
if (image != null) image.dispose ();
}
});
Button button = new Button (shell, SWT.PUSH);
button.setText ("Snapshot");
button.addListener (SWT.Selection, new Listener () {
@Override
public void handleEvent (Event e) {
Image image = label.getImage ();
if (image != null) image.dispose ();
image = new Image (display, group.getBounds ());
GC gc = new GC (image);
boolean success = group.print (gc);
gc.dispose ();
label.setImage (image);
if (!success) {
MessageBox messageBox = new MessageBox (shell, SWT.OK | SWT.PRIMARY_MODAL);
messageBox.setMessage ("Sorry, taking a snapshot is not supported on your platform");
messageBox.open ();
}
}
});
GridLayout layout = new GridLayout (2, true);
shell.setLayout(layout);
group.setLayoutData (new GridData (SWT.FILL, SWT.FILL, true, true));
label.setLayoutData (new GridData (SWT.FILL, SWT.FILL, true, true));
button.setLayoutData (new GridData (SWT.FILL, SWT.FILL, true, true, 2, 1));
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) display.sleep();
}
display.dispose();
}
}