Mega Code Archive
A dynamic gradient
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/*******************************************************************************
* 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: 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.widgets.Display;
import org.eclipse.swt.widgets.Event;
import org.eclipse.swt.widgets.Listener;
import org.eclipse.swt.widgets.Shell;
public class GradientDynamic {
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);
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();
}
}
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