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/*******************************************************************************
* Copyright (c) 2005 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.ui.internal.cheatsheets.composite.explorer;
import java.io.IOException;
import java.net.URL;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.core.runtime.Path;
import org.eclipse.core.runtime.Platform;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.cheatsheets.ICompositeCheatSheetTask;
import org.eclipse.ui.internal.cheatsheets.CheatSheetPlugin;
import org.eclipse.ui.internal.cheatsheets.composite.views.TaskEditorManager;
import org.osgi.framework.Bundle;
public class TreeLabelProvider extends LabelProvider {
private static int BLOCKED = -1;
private Image defaultImage = null; // Image for tasks with null kind
/*
* A set of related images
*/
private class ImageSet {
// Use a map rather than array so the nuber of icons is not hard coded
Map images = new HashMap();
public void put(int index, Image image) {
images.put(Integer.toString(index), image);
}
public Image getImage(int index) {
return (Image)images.get(Integer.toString(index));
}
void dispose() {
for (Iterator iter = images.values().iterator(); iter.hasNext(); ) {
Image nextImage = (Image)iter.next();
nextImage.dispose();
}
}
}
private Map imageMap = null; // each entry is an ImageSet
public TreeLabelProvider() {
imageMap = new HashMap();
}
public String getText(Object obj) {
if (obj instanceof ICompositeCheatSheetTask)
return ((ICompositeCheatSheetTask) obj).getName();
return obj.toString();
}
public Image getImage(Object obj) {
if (obj instanceof ICompositeCheatSheetTask) {
ICompositeCheatSheetTask task = (ICompositeCheatSheetTask) obj;
return lookupImage(task.getKind(), task.getState(), task.isStartable());
}
return super.getImage(obj);
}
private Image getDefaultImage() {
if (defaultImage == null) {
ImageDescriptor desc = createImageDescriptor("icons/obj16/info_task.gif"); //$NON-NLS-1$
defaultImage = desc.createImage();
}
return defaultImage;
}
public Image lookupImage(String kind, int state, boolean isStartable) {
if (kind == null) {
return getDefaultImage();
}
ImageSet images = (ImageSet) imageMap.get(kind);
if (images == null) {
images = createImages(kind);
imageMap.put(kind, images);
}
if (isStartable) {
return images.getImage(state);
}
return images.getImage(BLOCKED);
}
private ImageSet createImages(String kind) {
ImageSet images = new ImageSet();
ImageDescriptor desc = TaskEditorManager.getInstance().getImageDescriptor(kind);
if (desc != null) {
images.put(ICompositeCheatSheetTask.NOT_STARTED, desc.createImage());
ImageDescriptor inProgress = createImageDescriptor("icons/ovr16/task_in_progress.gif"); //$NON-NLS-1$
OverlayIcon icon = new OverlayIcon(desc, new ImageDescriptor[][] {
{}, { inProgress } });
images.put(ICompositeCheatSheetTask.IN_PROGRESS, icon.createImage());
ImageDescriptor complete = createImageDescriptor("icons/ovr16/task_complete.gif"); //$NON-NLS-1$
icon = new OverlayIcon(desc, new ImageDescriptor[][] {
{}, { complete } });
images.put(ICompositeCheatSheetTask.COMPLETED, icon.createImage());
ImageDescriptor blocked = createImageDescriptor("icons/ovr16/task_blocked.gif"); //$NON-NLS-1$
icon = new OverlayIcon(desc, new ImageDescriptor[][] {
{}, { blocked } });
images.put(BLOCKED, icon.createImage());
}
return images;
}
private ImageDescriptor createImageDescriptor(String relativePath) {
Bundle bundle = CheatSheetPlugin.getPlugin().getBundle();
URL url = Platform.find(bundle, new Path(relativePath));
try {
url = Platform.resolve(url);
return ImageDescriptor.createFromURL(url);
} catch (IOException e) {
return null;
}
}
public void dispose() {
if (imageMap != null) {
for (Iterator iter = imageMap.values().iterator(); iter.hasNext(); ) {
ImageSet nextImages = (ImageSet)iter.next();
nextImages.dispose();
}
imageMap = null;
}
if (defaultImage != null) {
defaultImage.dispose();
defaultImage = null;
}
}
}
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