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/*******************************************************************************
* Copyright (c) 2004, 2007 Boeing.
* 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:
* Boeing - initial API and implementation
*******************************************************************************/
package org.eclipse.osee.framework.ui.plugin.util;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.osee.framework.plugin.core.util.Jobs;
import org.eclipse.osee.framework.ui.swt.IContentProviderRunnable;
import org.eclipse.osee.framework.ui.swt.ITreeNode;
import org.eclipse.osee.framework.ui.swt.TreeNode;
/**
* @author Robert A. Fisher
*/
public class JobbedNode extends TreeNode {
private static final long serialVersionUID = 2285210369260889786L;
private static final JobbedNode LOADING_NODE = new JobbedNode("Loading...");
private static final JobbedNode CANCELLED_NODE = new JobbedNode("Cancelled");
private static final Object[] LOADING = new Object[] {LOADING_NODE};
private static final Object[] CANCELLED = new Object[] {CANCELLED_NODE};
private final Viewer viewer;
private final IContentProviderRunnable providerRunnable;
private boolean expand = false;
private JobbedNode(String title) {
super(null, null, title);
this.viewer = null;
this.providerRunnable = null;
}
public JobbedNode(Object backingData, Viewer viewer, IContentProviderRunnable providerRunnable) {
this(backingData, viewer, providerRunnable, null);
}
public JobbedNode(Object backingData, Viewer viewer, IContentProviderRunnable providerRunnable, JobbedNode parent) {
super(parent, null, backingData);
this.viewer = viewer;
this.providerRunnable = providerRunnable;
}
@Override
public Object[] getChildren() {
if (children == null && providerRunnable != null) {
children = LOADING;
Jobs.startJob(new GetChildrenJob(null, viewer, this, providerRunnable));
}
return children;
}
public void cancelled() {
cancelled(CANCELLED);
}
public void cancelled(Exception ex) {
cancelled(new Object[] {ex});
}
private void cancelled(Object[] children) {
this.children = children;
Displays.ensureInDisplayThread(new Runnable() {
public void run() {
viewer.refresh();
}
});
}
@Override
public void setChildren(Object[] objChildren) {
super.setChildren(objChildren);
if (expand) {
if (viewer instanceof TreeViewer) {
final TreeViewer treeViewer = (TreeViewer) viewer;
Displays.ensureInDisplayThread(new Runnable() {
public void run() {
treeViewer.refresh();
treeViewer.expandToLevel(2);
}
});
}
}
}
public void refresh() {
refresh(false);
}
public void refresh(boolean expand) {
this.expand = expand;
if (children != null) for (Object obj : children)
if (obj instanceof JobbedNode) ((JobbedNode) obj).refresh(true);
children = null;
}
@Override
protected ITreeNode getChild(Object backingData) {
return new JobbedNode(backingData, viewer, providerRunnable, this);
}
}
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