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/******************************************************************************
* All Right Reserved.
* Copyright (c) 1998, 2004 Jackwind Li Guojie
*
* Created on 2004-4-21 22:36:43 by JACK
* $Id$
*
*****************************************************************************/
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.PaintEvent;
import org.eclipse.swt.events.PaintListener;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.graphics.ImageData;
import org.eclipse.swt.layout.FillLayout;
import org.eclipse.swt.widgets.Canvas;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class AlphaFadeIn {
Display display = new Display();
Shell shell = new Shell(display);
public AlphaFadeIn() {
shell.setLayout(new FillLayout());
final Canvas canvas = new Canvas(shell, SWT.NULL);
ImageData imageData = new ImageData("java2s.gif");
ImageData imageData2 = imageData.scaledTo(100, 100);
Image image2 = new Image(display, imageData2);
byte[] alphaValues = new byte[imageData.height * imageData.width];
for(int j=0; j<imageData.height; j++) {
for(int i=0; i<imageData.width; i++) {
alphaValues[j*imageData.width + i] = (byte) (255 - 255 * i / imageData.width);
}
}
imageData.alphaData = alphaValues;
final Image image = new Image(display, imageData);
canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent e) {
e.gc.drawImage(image, 10, 10);
}
});
shell.setSize(200, 100);
shell.open();
//textUser.forceFocus();
// Set up the event loop.
while (!shell.isDisposed()) {
if (!display.readAndDispatch()) {
// If no more entries in event queue
display.sleep();
}
}
display.dispose();
}
private void init() {
}
public static void main(String[] args) {
new AlphaFadeIn();
}
}
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