org.eclipse.ant.internal.ui.views.actions.CollapseAllHandler.java Source code

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Here is the source code for org.eclipse.ant.internal.ui.views.actions.CollapseAllHandler.java

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/*******************************************************************************
 * Copyright (c) 2013 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.ant.internal.ui.views.actions;

import org.eclipse.ant.internal.ui.views.AntView;
import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.handlers.HandlerUtil;

/**
 * Default handler for Collapse All in the Ant view
 * 
 * @since 3.5.500
 */
public class CollapseAllHandler extends AbstractHandler {

    /*
     * (non-Javadoc)
     * 
     * @see org.eclipse.core.commands.IHandler#execute(org.eclipse.core.commands.ExecutionEvent)
     */
    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        IWorkbenchPart part = HandlerUtil.getActivePart(event);
        if (part instanceof AntView) {
            AntView view = (AntView) part;
            TreeViewer viewer = view.getViewer();
            try {
                viewer.getTree().setRedraw(false);
                viewer.collapseAll();
            } finally {
                viewer.getTree().setRedraw(true);
            }
        }
        return null;
    }
}