| /******************************************************************************* |
| * Copyright (c) 2004, 2008 Tasktop Technologies 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: |
| * Tasktop Technologies - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.mylyn.internal.provisional.commons.ui.editor; |
| |
| import org.eclipse.core.runtime.IStatus; |
| import org.eclipse.core.runtime.Status; |
| import org.eclipse.mylyn.internal.commons.ui.CommonsUiPlugin; |
| import org.eclipse.mylyn.internal.provisional.commons.ui.CommonImages; |
| import org.eclipse.swt.SWTException; |
| import org.eclipse.swt.graphics.Image; |
| import org.eclipse.ui.PlatformUI; |
| |
| /** |
| * Provides a spinner animation for the tab title of an editor. |
| * |
| * @author Shawn Minto |
| * @author Steffen Pingel |
| */ |
| public class EditorBusyIndicator { |
| |
| private class Animator implements Runnable { |
| |
| int imageDataIndex = 0; |
| |
| private final Image[] images; |
| |
| private boolean stopped; |
| |
| public Animator(Image[] images) { |
| this.images = images; |
| } |
| |
| public void run() { |
| if (stopped) { |
| return; |
| } |
| |
| try { |
| Image image = images[imageDataIndex]; |
| imageDataIndex = (imageDataIndex + 1) % images.length; |
| |
| if (updateTitleImage(image)) { |
| PlatformUI.getWorkbench().getDisplay().timerExec(UPDATE_INTERVAL, this); |
| } |
| } catch (Exception e) { |
| CommonsUiPlugin.getDefault().getLog().log( |
| new Status(IStatus.ERROR, CommonsUiPlugin.ID_PLUGIN, "Failed to update animation", e)); //$NON-NLS-1$ |
| } |
| } |
| |
| public void stop() { |
| stopped = true; |
| } |
| } |
| |
| private static final int UPDATE_INTERVAL = 90; |
| |
| private Animator animator; |
| |
| private final IBusyEditor editor; |
| |
| private Image[] images; |
| |
| private Image oldImage; |
| |
| public EditorBusyIndicator(IBusyEditor editor) { |
| this.editor = editor; |
| } |
| |
| /** |
| * Starts the busy indication. |
| * |
| * @see #stop() |
| */ |
| public void start() { |
| if (animator != null) { |
| stop(); |
| } |
| |
| try { |
| if (images == null) { |
| images = CommonImages.getProgressImages(); |
| // if image fails to load do not continue |
| if (images == null) { |
| return; |
| } |
| } |
| |
| oldImage = editor.getTitleImage(); |
| |
| if (images.length > 1) { |
| animator = new Animator(images); |
| animator.run(); |
| } |
| } catch (SWTException e) { |
| CommonsUiPlugin.getDefault().getLog().log( |
| new Status(IStatus.ERROR, CommonsUiPlugin.ID_PLUGIN, "Failed to start animation", e)); //$NON-NLS-1$ |
| } |
| } |
| |
| /** |
| * Stops the animation. |
| * |
| * @see #start() |
| */ |
| public void stop() { |
| if (animator != null) { |
| animator.stop(); |
| animator = null; |
| |
| updateTitleImage(oldImage); |
| oldImage = null; |
| } |
| } |
| |
| private boolean updateTitleImage(final Image image) { |
| if (!PlatformUI.getWorkbench().isClosing()) { |
| if (image != null && !image.isDisposed()) { |
| editor.setTitleImage(image); |
| return true; |
| } else { |
| if (oldImage != null && !oldImage.isDisposed()) { |
| editor.setTitleImage(oldImage); |
| } |
| } |
| } |
| return false; |
| } |
| |
| } |