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/*******************************************************************************
* Copyright (c) 2008 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.swt.snippets;
/*
* Create a ToolBar containing animated GIFs
*
* For a list of all SWT example snippets see
* http://www.eclipse.org/swt/snippets/
*/
import java.io.File;
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
public class Snippet288 {
static Display display;
static Shell shell;
static GC shellGC;
static Color shellBackground;
static ImageLoader[] loader;
static ImageData[][] imageDataArray;
static Thread animateThread[];
static Image[][] image;
private static ToolItem item[];
static final boolean useGIFBackground = false;
public static void main (String [] args) {
display = new Display();
Shell shell = new Shell (display);
shellBackground = shell.getBackground();
FileDialog dialog = new FileDialog(shell, SWT.OPEN | SWT.MULTI);
dialog.setText("Select Multiple Animated GIFs");
dialog.setFilterExtensions(new String[] {"*.gif"});
String filename = dialog.open();
String filenames[] = dialog.getFileNames();
int numToolBarItems = filenames.length;
if (numToolBarItems > 0) {
try {
loadAllImages(new File(filename).getParent(), filenames);
} catch (SWTException e) {
System.err.println("There was an error loading an image.");
e.printStackTrace();
}
ToolBar toolBar = new ToolBar (shell, SWT.FLAT | SWT.BORDER | SWT.WRAP);
item = new ToolItem[numToolBarItems];
for (int i = 0; i < numToolBarItems; i++) {
item[i] = new ToolItem (toolBar, SWT.PUSH);
item[i].setImage(image[i][0]);
}
toolBar.pack ();
shell.open ();
startAnimationThreads();
while (!shell.isDisposed()) {
if (!display.readAndDispatch ()) display.sleep ();
}
for (int i = 0; i < numToolBarItems; i++) {
for (int j = 0; j < image[i].length; j++) {
image[i][j].dispose();
}
}
}
display.dispose ();
}
private static void loadAllImages(String directory, String[] filenames) throws SWTException {
int numItems = filenames.length;
loader = new ImageLoader[numItems];
imageDataArray = new ImageData[numItems][];
image = new Image[numItems][];
for (int i = 0; i < numItems; i++) {
loader[i] = new ImageLoader();
int fullWidth = loader[i].logicalScreenWidth;
int fullHeight = loader[i].logicalScreenHeight;
imageDataArray[i] = loader[i].load(directory + File.separator + filenames[i]);
int numFramesOfAnimation = imageDataArray[i].length;
image[i] = new Image[numFramesOfAnimation];
for (int j = 0; j < numFramesOfAnimation; j++) {
if (j == 0) {
//for the first frame of animation, just draw the first frame
image[i][j] = new Image(display, imageDataArray[i][j]);
fullWidth = imageDataArray[i][j].width;
fullHeight = imageDataArray[i][j].height;
}
else {
//after the first frame of animation, draw the background or previous frame first, then the new image data
image[i][j] = new Image(display, fullWidth, fullHeight);
GC gc = new GC(image[i][j]);
gc.setBackground(shellBackground);
gc.fillRectangle(0, 0, fullWidth, fullHeight);
ImageData imageData = imageDataArray[i][j];
switch (imageData.disposalMethod) {
case SWT.DM_FILL_BACKGROUND:
/* Fill with the background color before drawing. */
Color bgColor = null;
if (useGIFBackground && loader[i].backgroundPixel != -1) {
bgColor = new Color(display, imageData.palette.getRGB(loader[i].backgroundPixel));
}
gc.setBackground(bgColor != null ? bgColor : shellBackground);
gc.fillRectangle(imageData.x, imageData.y, imageData.width, imageData.height);
if (bgColor != null) bgColor.dispose();
break;
default:
/* Restore the previous image before drawing. */
gc.drawImage(
image[i][j-1],
0,
0,
fullWidth,
fullHeight,
0,
0,
fullWidth,
fullHeight);
break;
}
Image newFrame = new Image(display, imageData);
gc.drawImage(newFrame,
0,
0,
imageData.width,
imageData.height,
imageData.x,
imageData.y,
imageData.width,
imageData.height);
newFrame.dispose();
gc.dispose();
}
}
}
}
private static void startAnimationThreads() {
animateThread = new Thread[image.length];
for (int ii = 0; ii < image.length; ii++) {
final int i = ii;
animateThread[i] = new Thread("Animation "+i) {
int imageDataIndex = 0;
public void run() {
try {
int repeatCount = loader[i].repeatCount;
while (loader[i].repeatCount == 0 || repeatCount > 0) {
imageDataIndex = (imageDataIndex + 1) % imageDataArray[i].length;
if (!display.isDisposed()) {
display.asyncExec(new Runnable() {
public void run() {
if (!item[i].isDisposed())
item[i].setImage(image[i][imageDataIndex]);
}
});
}
/* Sleep for the specified delay time (adding commonly-used slow-down fudge factors). */
try {
int ms = imageDataArray[i][imageDataIndex].delayTime * 10;
if (ms < 20) ms += 30;
if (ms < 30) ms += 10;
Thread.sleep(ms);
} catch (InterruptedException e) {
}
/* If we have just drawn the last image, decrement the repeat count and start again. */
if (imageDataIndex == imageDataArray[i].length - 1) repeatCount--;
}
} catch (SWTException ex) {
System.out.println("There was an error animating the GIF");
ex.printStackTrace();
}
}
};
animateThread[i].setDaemon(true);
animateThread[i].start();
}
}
}
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