/*******************************************************************************
 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
 * in Industry THTH ry.
 * 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:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.modeling.ui.modelBrowser.handlers;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.handlers.HandlerUtil;
import org.simantics.browsing.ui.common.views.IFilterArea;
import org.simantics.browsing.ui.common.views.IFilterAreaProvider;

public class ActivateFilterHandler extends AbstractHandler {

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        IWorkbenchPart part = HandlerUtil.getActivePartChecked(event);
        IFilterAreaProvider fap = null;
        if (part instanceof IFilterAreaProvider)
            fap = (IFilterAreaProvider) part;
        if (fap == null)
            fap = (IFilterAreaProvider) part.getAdapter(IFilterAreaProvider.class);
        if (fap == null)
            return null;

        IFilterArea fa = fap.getFilterArea();
        if (fa == null)
            return null;

        fa.focus();
        return null;
    }

}