DelayedLoadChildNodesOnTreeExpansion.java

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/*
 * 
 * Autopsy Forensic Browser
 * 
 * Copyright 2018 Basis Technology Corp.
 * Contact: carrier <at> sleuthkit <dot> org
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *     http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.sleuthkit.autopsy.corecomponents;

import javax.swing.event.TreeExpansionEvent;
import javax.swing.event.TreeExpansionListener;
import org.openide.explorer.view.Visualizer;
import org.openide.nodes.Node;

public final class DelayedLoadChildNodesOnTreeExpansion implements TreeExpansionListener {

    @Override
    public synchronized void treeCollapsed(final TreeExpansionEvent event) {
        // Do nothing on collapse. Netbeans should manage nodes falling out of scope and GC.
    }

    @Override
    public synchronized void treeExpanded(final TreeExpansionEvent event) {
        Node eventNode = Visualizer.findNode(event.getPath().getLastPathComponent());
        if (eventNode instanceof TableFilterNode) {
            final TableFilterNode node = (TableFilterNode) eventNode;
            node.refresh();
        }

    }
}