net.tourbook.ui.action.ActionCollapseOthers.java Source code

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Here is the source code for net.tourbook.ui.action.ActionCollapseOthers.java

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/*******************************************************************************
 * Copyright (C) 2005, 2009  Wolfgang Schramm and Contributors
 *   
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software 
 * Foundation version 2 of the License.
 *  
 * This program is distributed in the hope that it will be useful, but WITHOUT 
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS 
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with 
 * this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110, USA    
 *******************************************************************************/
package net.tourbook.ui.action;

import net.tourbook.Messages;
import net.tourbook.common.util.ITourViewer;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.viewers.ColumnViewer;
import org.eclipse.jface.viewers.StructuredSelection;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.swt.widgets.Tree;

public class ActionCollapseOthers extends Action {

    private ITourViewer fTourViewer;

    public ActionCollapseOthers(final ITourViewer tourViewer) {

        super(null, AS_PUSH_BUTTON);

        fTourViewer = tourViewer;

        setText(Messages.app_action_collapse_others_tooltip);
        setToolTipText(Messages.app_action_collapse_others_tooltip);
        //      setImageDescriptor(TourbookPlugin.getImageDescriptor(Messages.Image__collapse_all));

    }

    @Override
    public void run() {

        if (fTourViewer != null) {

            final ColumnViewer viewer = fTourViewer.getViewer();
            if (viewer instanceof TreeViewer) {

                final TreeViewer treeViewer = (TreeViewer) viewer;
                final Object firstElement = ((StructuredSelection) treeViewer.getSelection()).getFirstElement();

                if (firstElement != null) {

                    final Tree tree = treeViewer.getTree();
                    tree.setRedraw(false);
                    {
                        treeViewer.collapseAll();
                        treeViewer.setExpandedElements(new Object[] { firstElement });
                        treeViewer.setSelection(new StructuredSelection(firstElement), true);
                    }
                    tree.setRedraw(true);
                }
            }
        }
    }
}