/*******************************************************************************
* Copyright (c) 2000, 2005 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
*******************************************************************************/
/*
* Control example snippet: set a background image (a dynamic gradient)
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*
* @since 3.2
*/
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class BackgroundImageControl {
static Image oldImage;
public static void main(String[] args) {
final Display display = new Display();
final Shell shell = new Shell(display);
shell.setBackgroundMode(SWT.INHERIT_DEFAULT);
FillLayout layout1 = new FillLayout(SWT.VERTICAL);
layout1.marginWidth = layout1.marginHeight = 10;
shell.setLayout(layout1);
Group group = new Group(shell, SWT.NONE);
group.setText("Group ");
RowLayout layout2 = new RowLayout(SWT.VERTICAL);
layout2.marginWidth = layout2.marginHeight = layout2.spacing = 10;
group.setLayout(layout2);
for (int i = 0; i < 8; i++) {
Button button = new Button(group, SWT.RADIO);
button.setText("Button " + i);
}
shell.addListener(SWT.Resize, new Listener() {
public void handleEvent(Event event) {
Rectangle rect = shell.getClientArea();
Image newImage = new Image(display, Math.max(1, rect.width), 1);
GC gc = new GC(newImage);
gc.setForeground(display.getSystemColor(SWT.COLOR_WHITE));
gc.setBackground(display.getSystemColor(SWT.COLOR_BLUE));
gc.fillGradientRectangle(rect.x, rect.y, rect.width, 1, false);
gc.dispose();
shell.setBackgroundImage(newImage);
if (oldImage != null)
oldImage.dispose();
oldImage = newImage;
}
});
shell.pack();
shell.open();
while (!shell.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
if (oldImage != null)
oldImage.dispose();
display.dispose();
}
}