/* 
 * Copyright (c) 2008 Stiftung Deutsches Elektronen-Synchrotron, 
 * Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY.
 *
 * THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS. 
 * WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED 
 * TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND 
 * NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE 
 * FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, 
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR 
 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE 
 * IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR 
 * CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE. 
 * NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
 * DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS, 
 * OR MODIFICATIONS.
 * THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION, 
 * USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS 
 * PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY 
 * AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM
 */
 package org.csstudio.sds.ui.internal.properties.view;

import org.eclipse.jface.action.Action;

/**
 * This is the base class of all the local actions used in the PropertySheet.
 * 
 * @author Sven Wende
 */
abstract class PropertySheetAction extends Action implements IWidgetSelectionListener {
	/**
	 * A property sheet viewer.
	 */
	private PropertySheetViewer _viewer;

	/**
	 * Create a PropertySheetViewer action.
	 * 
	 * @param viewer
	 *            a property sheet viewer
	 * @param id
	 *            the action id
	 */
	protected PropertySheetAction(final PropertySheetViewer viewer,
			final String id) {
		super(id);
		_viewer = viewer;
		_viewer.addWidgetSelectionListener(this);
		setId(id);
	}

	/**
	 * @return Returns the PropertySheetViewer.
	 */
	public PropertySheetViewer getPropertySheet() {
		return _viewer;
	}
	
	/**
	 * {@inheritDoc}
	 */
	@Override
	public void handleWidgetSelection(final Object[] selectedObjects) {
		this.setEnabled((selectedObjects!=null && selectedObjects.length>0));
	}

}