/*******************************************************************************
 * 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.g2d.element.handler.impl;

import org.simantics.g2d.diagram.IDiagram;
import org.simantics.g2d.element.ElementHints;
import org.simantics.g2d.element.IElement;
import org.simantics.g2d.element.handler.Stateful;
import org.simantics.g2d.element.handler.LifeCycle;

/**
 * @author Toni Kalajainen
 */
public class EnabledImpl implements Stateful, LifeCycle {

    private static final long serialVersionUID = -9001251146906678336L;

    public static final EnabledImpl ENABLED_BY_DEFAULT = new EnabledImpl();
    public static final EnabledImpl DISABLED_BY_DEFAULT = new EnabledImpl();

    @Override
    public boolean isEnabled(IElement e) {
        Boolean b = e.getHint(ElementHints.KEY_ENABLED); 
        return b==null ? false : b;
    }

    @Override
    public void setEnabled(IElement e, boolean enabled) {
        e.setHint(ElementHints.KEY_ENABLED, enabled);
    }

    @Override
    public void onElementActivated(IDiagram d, IElement e) {
    }

    @Override
    public void onElementCreated(IElement e) {
        e.setHint(ElementHints.KEY_ENABLED, true);
    }

    @Override
    public void onElementDeactivated(IDiagram d, IElement e) {
    }

    @Override
    public void onElementDestroyed(IElement e) {
    }

}