我需要以微调器的形式将动画 gif 添加到一些 SWT 小部件中，例如标签。此标签将作为默认值labelSpiner.setEnabled(false)。当我开始一些长时间的操作时，这个带有微调器的标签将labelSpinner.setEnabled(true)在窗口的右上角显示 ()。
Normaly Image 可以通过以下方式添加到标签中labelSpinner.setImage(arg0)
如果我将此 SPINNER.GIF 正常方式添加到标签中，它不会动画，它唯一的静态图像。
有人知道如何将动画 gif（例如一些微调器）添加到基于 SWT 的 JAVA SE 应用程序小部件中吗？我浏览了很多例子，但其中很多都是无用的，而且那些好的太复杂了。
我想做的很简单。
有人可以帮忙吗？
您是否尝试过有关SWTImages的 Eclipse 文章？
这部分将加载图像并将其显示在Canvas：
ImageLoader loader = new ImageLoader();
loader.load(getClass().getResourceAsStream("Idea_SWT_Animation.gif"));
Canvas canvas = new Canvas(shell,SWT.NONE);
image = new Image(display,loader.data[0]);
int imageNumber;
final GC gc = new GC(image);
canvas.addPaintListener(new PaintListener(){
public void paintControl(PaintEvent event){
event.gc.drawImage(image,0,0);
}
});
这部分更新了 gif：
Thread thread = new Thread(){
public void run(){
long currentTime = System.currentTimeMillis();
int delayTime = loader.data[imageNumber].delayTime;
while(currentTime + delayTime * 10 > System.currentTimeMillis()){
// Wait till the delay time has passed
}
display.asyncExec(new Runnable(){
public void run(){
// Increase the variable holding the frame number
imageNumber = imageNumber == loader.data.length-1 ? 0 : imageNumber+1;
// Draw the new data onto the image
ImageData nextFrameData = loader.data[imageNumber];
Image frameImage = new Image(display,nextFrameData);
gc.drawImage(frameImage,nextFrameData.x,nextFrameData.y);
frameImage.dispose();
canvas.redraw();
}
});
}
};
shell.open();
thread.start();
在尝试了至少 3 个不同的动画 GIF 示例后，没有一个有效，我开始自己工作，主要基于上面的答案。
这是一个完整的运行示例，包括：
删除 main 方法、base64 方法和图像数据，您将拥有一个工作的动画 GIF 画布。
import java.io.IOException;
import java.io.InputStream;
import org.eclipse.swt.SWT;
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.widgets.Canvas;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;
public class AnimatedGif extends Canvas {
public static void main(String[] args) throws IOException {
byte[] d = decode(b64.toCharArray(), 0, b64.length());
Display display = new Display ();
Shell shell = new Shell(display);
shell.setBounds(0, 0, 100, 100);
AnimatedGif gif = new AnimatedGif(shell, SWT.NONE);
gif.setLocation(10,10);
gif.setSize(16, 16);
gif.load(new java.io.ByteArrayInputStream(d));
shell.open();
gif.animate();
while (!shell.isDisposed ()) {
if (!display.readAndDispatch ()) display.sleep ();
}
display.dispose ();
}
private final ImageLoader loader = new ImageLoader();
private int img = 0;
private volatile boolean animating = false;
private Thread animateThread;
public AnimatedGif(Composite parent, int style) {
super(parent, style);
}
public void load (InputStream resource) throws IOException {
loader.load(resource);
}
public void animate() {
if (animateThread == null) {
animateThread = createThread();
animateThread.setDaemon(true);
}
if (animateThread.isAlive())
return;
animateThread.start();
}
public void stop() {
animating = false;
if (animateThread != null)
try {
animateThread.join();
animateThread = null;
} catch (InterruptedException e) {
// do nothing
}
}
private Thread createThread() {
return new Thread() {
long currentTime = System.currentTimeMillis();
final Display display = getParent().getDisplay();
public void run() {
animating = true;
while(animating) {
img = (img == loader.data.length-1) ? 0 : img + 1;
int delayTime = Math.max(50, 10*loader.data[img].delayTime);
long now = System.currentTimeMillis();
long ms = Math.max(currentTime + delayTime - now, 5);
currentTime += delayTime;
try {
Thread.sleep(ms);
} catch(Exception e) {
return;
}
if (!display.isDisposed())
display.asyncExec(new Runnable() {
@Override
public void run() {
ImageData nextFrameData = loader.data[img];
Image frameImage = new Image(display, nextFrameData);
new GC(AnimatedGif.this).drawImage(frameImage, nextFrameData.x, nextFrameData.y);
frameImage.dispose();
//canvas.redraw();
}
});
}
Display.getDefault().asyncExec(new Runnable() {
@Override
public void run() {
new GC(AnimatedGif.this).fillRectangle(
0,
0,
getBounds().width,
getBounds().height);
}
});
}
};
}
private static final char[] map1 = new char[64];
static {
int i = 0;
for (char c = 'A'; c <= 'Z'; c++)
map1[i++] = c;
for (char c = 'a'; c <= 'z'; c++)
map1[i++] = c;
for (char c = '0'; c <= '9'; c++)
map1[i++] = c;
map1[i++] = '+';
map1[i++] = '/';
}
private static final byte[] map2 = new byte[128];
static {
for (int i = 0; i < map2.length; i++)
map2[i] = -1;
for (int i = 0; i < 64; i++)
map2[map1[i]] = (byte) i;
}
public static byte[] decode(char[] in, int iOff, int iLen) {
if (iLen % 4 != 0)
throw new IllegalArgumentException(
"Length of Base64 encoded input string is not a multiple of 4.");
while (iLen > 0 && in[iOff + iLen - 1] == '=')
iLen--;
int oLen = (iLen * 3) / 4;
byte[] out = new byte[oLen];
int ip = iOff;
int iEnd = iOff + iLen;
int op = 0;
while (ip < iEnd) {
int i0 = in[ip++];
int i1 = in[ip++];
int i2 = ip < iEnd ? in[ip++] : 'A';
int i3 = ip < iEnd ? in[ip++] : 'A';
if (i0 > 127 || i1 > 127 || i2 > 127 || i3 > 127)
throw new IllegalArgumentException(
"Illegal character in Base64 encoded data.");
int b0 = map2[i0];
int b1 = map2[i1];
int b2 = map2[i2];
int b3 = map2[i3];
if (b0 < 0 || b1 < 0 || b2 < 0 || b3 < 0)
throw new IllegalArgumentException(
"Illegal character in Base64 encoded data.");
int o0 = (b0 << 2) | (b1 >>> 4);
int o1 = ((b1 & 0xf) << 4) | (b2 >>> 2);
int o2 = ((b2 & 3) << 6) | b3;
out[op++] = (byte) o0;
if (op < oLen)
out[op++] = (byte) o1;
if (op < oLen)
out[op++] = (byte) o2;
}
return out;
}
static String b64 =
"R0lGODlhEAAQAPf/AMra5KO9zOzz9s3b5MDS3aS+zZOwwsrZ4+bt89jm7IKftuLr" +
"8ZCswH6bs9vn7qrD0+Ts8oqnvYKetomlu8PV4t7p79Pg6dzp79vm7q/F1aC6zdTi" +
"6bbL2XqYsdDf55SwxK/H1ajC0Yajudzp7q7E087c59Xi6niWr8XY4qW/0LnM2aO9" +
"zoyov7bK2djk7ICbtIOhtt7p7pq1yc3b5sDU38DR39vm7LDH1afA0Yqovebu85Gt" +
"wouovsvZ5oCdtunv9IaiuXyZscrb5qnC0Zezxdjj64WiuZ65y7vQ3N/p8OLq8avE" +
"1MTX4o6rwJaxxLnN29jm7a7F1dvm7Y2qwH2bs7zQ3Jizx9Df6djj7HmXr+Tt8rvO" +
"26/E1LrO3KC5zKW+z8/e577Q3oCctYShubTK2HyasZGtwHuYsdTg6enw89/p76zE" +
"04iku+Lr8LXJ2JKvw+Xt8tHf583b57vP3pu2ycjY45m0yNvp7qzE1bHI13qZsaK8" +
"zn2aspq0yODp8Nfi6svb5oaiuuDp76vE09Hf6ZWzxMfY4qnC087e5+rx9eLs8pSv" +
"xL/R3rPI2Nfj64ajuq7E1Y2pv7rQ2+Lp8J65yarC1JKvxLzR3nybsrzQ3unw9HmY" +
"sLvR3LPI17nO28rY5Iqlvc3c5urx9Iakus/f53iVrtPi6cnY436btNTi6tfi67PK" +
"1rHI2H6bspy3yJ63ydXi7JezxKjA0ZGuwNjk64CbtazE0Zezx8DR3NXi68TX4Nvn" +
"7e7097vP24CctH2atIqlvN7o7tPh6Nzn7JGvwK/F1MbX4dHg6MfY4b7S3c/e5n2b" +
"srjN2ezy9eDq78rb4svb473R2+Ts8cHV3r7R3eXu8rfN2JSvwo+tv9/p7pSxw6C7" +
"ytbj6cTX36zD1NHg5vL3+KnB0Onx9cPV35y4yLPJ1dnl7LnO2cHU3avD0bnP2sDV" +
"4pKvwdfk7O7z99Xi6XqXsNTi6N3o7sjY4ubv8s7c5qvE0env842svuLs8Z64yJm0" +
"xZq2x46svuLq8P///yH/C05FVFNDQVBFMi4wAwEAAAAh+QQFAAD/ACwAAAAAEAAQ" +
"AAAIvQD/CRR4poEEf0q0DFz478SZFwqAxPC3AAEChqU6GAQSwcHEihcFntAoQUQE" +
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"/wAsAAAAABAAEAAACNYA/wkUeMTSDhZGXgxc+C9Fij10PjSZoADVJoYk8IRIoaHP" +
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"9cQ/BzFGOMAg5Z+Nf3YmjCkrsEISf37U/FOs6JICBa2CDPS3YMHAJDEQWOFThqE/" +
"HQj+lV7wA9CvqgJhx9aihGFAACH5BAUAAP8ALAAAAAAQABAAAAjAAP8JFMipCodO" +
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"PwLjTRBXhN8TAxEgEDhWrt9SDCXfjQFEwYszkKX+06LEH90zDAMCACH5BAkAAP8A" +
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"kBduQqVgQpMPdPakSHFR4AsjZC0dYRgQACH5BAUAAP8ALAAAAAAQABAAAAjRAP8J" +
"FFgBAQIdP2wMXPhPCYSHECG0GcaQBi9/GDNirNBuIA8xkjSNuEDywoiTuzYIpKLg" +
"0RxFCWLGhAIlgaN/D4womNCE0UJHJSzkMpHphQIjwFgw/KcrFBo0hCTUghHBy1JG" +
"dTx4CNVAAVUiS9cxmTGjRxlfO80spUHDEAoUE17AmLDDysIuYeYwqnHpH8sJDG5p" +
"CFGJSwsVT7pIEtg1ghkiGnCEWHODDIctWwbOreslxaEHUW40usEwAgMrGlIMipKB" +
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"xwPQjwUQD+rAsBATHysIYiQZCNHfwBWtFCi4pMjBiH9q/PhLkkBghxdjJtj5Z+Of" +
"FAwmYzj4xyaIDxEsmih0kQCDUSzw+CiYsGPhP1V/irhIlaXBvwmWnFowtcHElTIv" +
"jPD44FRIHEIWrvgESnahEDklwMygIoFNEydHFFJAcepTjzr/YEQwQ8QLjgfeOHRB" +
"QoMCBYFAcryRsQdHCBKNODzZEobDwCmL6KwIcWjJDTIqtiBZaObI6ChcQNxw48ap" +
"wBVDSGRYs2ZhQAA7";
}
这是提供的示例代码。基本上这就是它的工作原理。与其他图像格式不同，动画 GIF 将具有一组 ImageData（就像动画中的帧）。您将以所需的延迟在 Cavans 上渲染此图像数据。
http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/DisplayananimatedGIF.htm
这也是基于关于SWT的 Eclipse 文章的工作示例代码。我试图从文件夹中的图像制作幻灯片或动画 gif 对话框。发布在这里，因为它可能对某人有用。
public class GifDialog extends Dialog {
Shell dialog;
private Canvas canvas;
int numberImage = 1;
private volatile boolean running = true;
final List<Image> imageCollection = new ArrayList<Image>();
DenemeDialog(Shell parent) {
super(parent);
}
public String open() {
Shell parent = getParent();
this.func();
dialog = new Shell(parent, SWT.DIALOG_TRIM | SWT.APPLICATION_MODAL);
dialog.setSize(600, 400);
dialog.setText("Show Begins!!!");
Monitor primary = dialog.getDisplay().getPrimaryMonitor();
Rectangle bounds = primary.getBounds();
Rectangle rect = dialog.getBounds();
int x = bounds.x + (bounds.width - rect.width) / 2;
int y = bounds.y + (bounds.height - rect.height) / 2;
dialog.setLocation(x, y);
dialog.setLayout(new FillLayout());
final Canvas canvas = new Canvas(dialog, SWT.NONE);
final Image image = new Image(dialog.getDisplay(), imageCollection.get(
0).getImageData());
final GC gc = new GC(image);
canvas.addPaintListener(new PaintListener() {
public void paintControl(PaintEvent event) {
event.gc.drawImage(image, 0, 0);
}
});
Thread thread = new Thread() {
public void run() {
while (running) {
dialog.getDisplay().asyncExec(new Runnable() {
public void run() {
numberImage = numberImage == imageCollection.size() - 1
? 0 : numberImage + 1;
ImageData nextFrameData = imageCollection.get(
numberImage).getImageData();
Image frameImage = new Image(dialog.getDisplay(),
nextFrameData);
gc.drawImage(frameImage, nextFrameData.x,
nextFrameData.y);
frameImage.dispose();
canvas.redraw();
if (numberImage == 0)
try {
running = false;
} catch (Exception e) {
e.printStackTrace();
}
try {
Thread.sleep(200);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
});
}
}
};
dialog.open();
thread.start();
Display display = parent.getDisplay();
while (!dialog.isDisposed()) {
if (!display.readAndDispatch())
display.sleep();
}
return "After Dialog";
}
public void func() {
File path = new File("..\folder");
File[] files = path.listFiles();
for (int i = 0; i < files.length; i++) {
if (files[i].isFile()) { // this line weeds out other
// directories/folders
try {
ImageData imageData = new ImageData(
new ByteArrayInputStream(loadImage(files[i])));
final Image image = new Image(Display.getDefault(),
imageData);
imageCollection.add(image);
} catch (IOException e1) {
e1.printStackTrace();
}
}
}
}
public byte[] loadImage(File file) throws IOException {
BufferedImage image = ImageIO.read(file);
ByteArrayOutputStream bos = new ByteArrayOutputStream();
ImageIO.write(image, "jpg", bos);
return bos.toByteArray();
}
public Canvas getCanvas() {
return canvas;
}
public void setCanvas(Canvas canvas) {
this.canvas = canvas;
}