1.渐变：

复制代码 代码如下:

package swt_jface.demo10;

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("C:/icons/eclipse.jpg");

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();

while (!shell.isDisposed()) {

if (!display.readAndDispatch()) {

display.sleep();

}

}

display.dispose();

}

public static void main(String[] args) {

new AlphaFadeIn();

}

}

2.动态

复制代码 代码如下:

package swt_jface.demo10;

import org.eclipse.swt.SWT;

import org.eclipse.swt.events.PaintEvent;

import org.eclipse.swt.events.PaintListener;

import org.eclipse.swt.events.ShellAdapter;

import org.eclipse.swt.events.ShellEvent;

import org.eclipse.swt.graphics.GC;

import org.eclipse.swt.graphics.Image;

import org.eclipse.swt.graphics.ImageData;

import org.eclipse.swt.graphics.ImageLoader;

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 Animations {

Display display = new Display();

Shell shell = new Shell(display);

public Animations() {

shell.setLayout(new FillLayout());

ImageLoader imageLoader = new ImageLoader();

final ImageData[] imageDatas = imageLoader.load("C:/icons/eclipse-ani.gif");

final Image image = new Image(display, imageDatas[0].width, imageDatas[0].height);

final Canvas canvas = new Canvas(shell, SWT.NULL);

canvas.addPaintListener(new PaintListener() {

public void paintControl(PaintEvent e) {

e.gc.drawImage(image, 0, 0);

}

});

final GC gc = new GC(image);

final Thread thread = new Thread() {

int frameIndex = 0;

public void run() {

while (!isInterrupted()) {

frameIndex %= imageDatas.length;

final ImageData frameData = imageDatas[frameIndex];

display.asyncExec(new Runnable() {

public void run() {

Image frame =

new Image(display, frameData);

gc.drawImage(frame, frameData.x, frameData.y);

frame.dispose();

canvas.redraw();

}

});

try {

Thread.sleep(imageDatas[frameIndex].delayTime * 10);

} catch (InterruptedException e) {

return;

}

frameIndex += 1;

}

}

};

shell.addShellListener(new ShellAdapter() {

public void shellClosed(ShellEvent e) {

thread.interrupt();

}

});

shell.setSize(400, 200);

shell.open();

thread.start();

while (!shell.isDisposed()) {

if (!display.readAndDispatch()) {

display.sleep();

}

}

display.dispose();

}

public static void main(String[] args) {

new Animations();

}

}

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