plugins/org.eclipse.amalgam.explorer.activity.ui/src/org/eclipse/amalgam/explorer/activity/ui/api/editor/pages/helper/SelectionHelper.java

/*******************************************************************************
 * Copyright (c)  2006, 2015 THALES GLOBAL SERVICES.
 * 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:
 *    Thales - initial API and implementation
 *******************************************************************************/
package org.eclipse.amalgam.explorer.activity.ui.api.editor.pages.helper;

import org.eclipse.jface.viewers.ISelection;
import org.eclipse.jface.viewers.ISelectionChangedListener;
import org.eclipse.jface.viewers.ISelectionProvider;
import org.eclipse.jface.viewers.SelectionChangedEvent;

public class SelectionHelper {

	/**
	 * Register given action to the selection changes emitted by given selection
	 * provider.
	 * 
	 * @param action_p
	 * @param selectionProvider_p
	 */
	public static void registerToSelectionChanges(ISelectionChangedListener action_p,
			ISelectionProvider selectionProvider_p) {
		// Listen selection changes.
		selectionProvider_p.addSelectionChangedListener(action_p);
		// Set the current selection otherwise at first run, selection is lost.
		ISelection selection = selectionProvider_p.getSelection();
		if (!selection.isEmpty()) {
			action_p.selectionChanged(new SelectionChangedEvent(selectionProvider_p, selection));
		}
	}
}