SWT(JFace)体验之图片的动态渐变效果

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.ec开发者_JS教程lipse.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);

     编程客栈;   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) {

        &nhttp://www.devze.combsp;       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 AlphaFwww.devze.comadeIn();

    }

}

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.ShellMeCdFSSAdapter;

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;

   &编程客栈nbsp;                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();

    }

}