/*******************************************************************************
* Copyright (c) 2000, 2015 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.dialogs.cpd;
import org.eclipse.jface.viewers.StructuredViewer;
import org.eclipse.ui.internal.dialogs.cpd.TreeManager.CheckListener;
import org.eclipse.ui.internal.dialogs.cpd.TreeManager.TreeItem;
/**
* On a model change, update a filtered listener. While the check listener
* provided by the model will take care of the elements which change, since
* we simulate our own check state of parents, the parents may need to be
* updated.
*
* @since 3.5
*/
final class FilteredModelCheckListener implements CheckListener {
private final ActionSetFilter filter;
private final StructuredViewer viewer;
FilteredModelCheckListener(ActionSetFilter filter, StructuredViewer viewer) {
this.filter = filter;
this.viewer = viewer;
}
@Override
public void checkChanged(TreeItem changedItem) {
TreeItem item = changedItem;
boolean update = false;
// Force an update on all parents.
while (item != null) {
update = update || filter.select(null, null, item);
if (update) {
viewer.update(item, null);
}
item = item.getParent();
}
}
}