扣丁学堂Java在线视频之SWT(JFace)体验之图片的动态渐变效果

SWT(JFace)体验之图片的动态渐变效果有不少喜欢Java开发或者是正在参加Java培训的小伙伴还不是很清楚，本篇文章扣丁学堂Java培训小编就带大家一起来看一下扣丁学堂Java在线视频之SWT(JFace)体验之图片的动态渐变效果，想要学习的小伙伴随小编一起来吧。

Java在线视频

1、渐变：

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：
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(); 
 } 
}
以上就是扣丁学堂Java在线学习小编给大家分享的SWT(JFace)体验之图片的动态渐变效果，希望对小伙伴们有所帮助，想要学习Java开发的小伙伴可以选择专业的Java培训机构扣丁学堂进行学习。