/*******************************************************************************
 * 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.scenegraph.ui;

import org.eclipse.core.commands.AbstractHandler;
import org.eclipse.core.commands.Command;
import org.eclipse.core.commands.ExecutionEvent;
import org.eclipse.core.commands.ExecutionException;
import org.eclipse.core.commands.State;
import org.eclipse.ui.IWorkbenchPart;
import org.eclipse.ui.PlatformUI;
import org.eclipse.ui.commands.ICommandService;
import org.eclipse.ui.handlers.HandlerUtil;

/**
 * @author Tuukka Lehtonen
 */
public class LinkToActiveWorkbenchPartHandler extends AbstractHandler {

    static final String COMMAND = "org.simantics.scenegraph.linkToActiveWorkbenchPart";
    static final String STATE   = "org.simantics.scenegraph.linkToActiveWorkbenchPart.state";

    @Override
    public Object execute(ExecutionEvent event) throws ExecutionException {
        IWorkbenchPart part = HandlerUtil.getActivePart(event);
        if (part == null || !(part instanceof SceneGraphViewPart))
            return null;
        SceneGraphViewPart sg = (SceneGraphViewPart) part;

        ICommandService service = (ICommandService) PlatformUI.getWorkbench().getService(ICommandService.class);
        Command command = service.getCommand(COMMAND);
        State state = command.getState(STATE);
        Boolean value = (Boolean) state.getValue();
        value = !value;
        state.setValue(value);

        sg.linkToActiveWorkbenchPart(value);

        return null;
    }

}