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/*******************************************************************************
* Copyright (c) 2009, 2018 Wind River Systems 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:
* Wind River Systems - initial API and implementation
* IBM Corporation - bug fixing
*******************************************************************************/
package org.eclipse.debug.tests.viewer.model;
import java.util.LinkedList;
import org.eclipse.core.runtime.Assert;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IChildrenCountUpdate;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdate;
import org.eclipse.debug.internal.ui.viewers.model.provisional.IViewerUpdateListener;
import org.eclipse.debug.internal.ui.viewers.model.provisional.TreeModelViewer;
import org.eclipse.jface.viewers.ILazyTreePathContentProvider;
import org.eclipse.jface.viewers.TreePath;
import org.eclipse.swt.widgets.Tree;
import org.eclipse.swt.widgets.TreeItem;
import org.eclipse.swt.widgets.Widget;
public class TreeModelViewerAutopopulateAgent implements IViewerUpdateListener {
private TreeModelViewer fViewer;
public TreeModelViewerAutopopulateAgent(TreeModelViewer viewer) {
fViewer = viewer;
fViewer.addViewerUpdateListener(this);
}
public void dispose() {
fViewer.removeViewerUpdateListener(this);
fViewer = null;
}
@Override
public void updateComplete(IViewerUpdate update) {
if (update instanceof IChildrenCountUpdate) {
TreePath path = update.getElementPath();
ILazyTreePathContentProvider contentProvider = (ILazyTreePathContentProvider) fViewer.getContentProvider();
Widget[] items = fViewer.testFindItems(update.getElement());
for (int i = 0; i < items.length; i++) {
if ( path.equals(getTreePath(items[i])) ) {
int itemCount = getItemChildCount(items[i]);
for (int j = 0; j < itemCount; j++) {
contentProvider.updateElement(path, j);
}
}
}
}
}
@Override
public void updateStarted(IViewerUpdate update) {
// TODO Auto-generated method stub
}
@Override
public void viewerUpdatesBegin() {
// TODO Auto-generated method stub
}
@Override
public void viewerUpdatesComplete() {
// TODO Auto-generated method stub
}
private TreePath getTreePath(Widget w) {
if (w instanceof TreeItem) {
TreeItem item = (TreeItem)w;
LinkedList<Object> segments = new LinkedList<>();
while (item != null) {
Object segment = item.getData();
Assert.isNotNull(segment);
segments.addFirst(segment);
item = item.getParentItem();
}
return new TreePath(segments.toArray());
}
return TreePath.EMPTY;
}
private int getItemChildCount(Widget w) {
if (w instanceof Tree) {
return ((Tree)w).getItemCount();
} else if (w instanceof TreeItem) {
return ((TreeItem)w).getItemCount();
}
return 0;
}
}
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