eu.geclipse.ui.internal.actions.CollapseAllAction.java Source code

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Here is the source code for eu.geclipse.ui.internal.actions.CollapseAllAction.java

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/*****************************************************************************
 * Copyright (c) 2006, 2007 g-Eclipse Consortium 
 * 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
 *
 * Initial development of the original code was made for the
 * g-Eclipse project founded by European Union
 * project number: FP6-IST-034327  http://www.geclipse.eu/
 *
 * Contributors:
 *    Mathias Stuempert - initial API and implementation
 *****************************************************************************/

package eu.geclipse.ui.internal.actions;

import java.net.URL;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.resource.ImageDescriptor;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.widgets.Display;

import eu.geclipse.ui.internal.Activator;

/**
 * Action for {@link TreeViewer}s that causes a collapse all.
 */
public class CollapseAllAction extends Action {

    /**
     * The viewer that is the target of this action.
     */
    TreeViewer viewer;

    /**
     * Construct a new collapse all action for the specified tree viewer.
     * 
     * @param viewer The tree viewer that is the target of this action. 
     */
    public CollapseAllAction(final TreeViewer viewer) {
        super(Messages.getString("CollapseAllAction.collapse_all_action_text")); //$NON-NLS-1$
        this.viewer = viewer;
        URL imgUrl = Activator.getDefault().getBundle().getEntry("icons/elcl16/collapseall.gif"); //$NON-NLS-1$
        setImageDescriptor(ImageDescriptor.createFromURL(imgUrl));
    }

    /* (non-Javadoc)
     * @see org.eclipse.jface.action.Action#run()
     */
    @Override
    public void run() {
        Display display = this.viewer.getControl().getDisplay();
        display.asyncExec(new Runnable() {
            public void run() {
                CollapseAllAction.this.viewer.collapseAll();
            }
        });
    }

}