lookAndFeel/plugins/org.eclipse.papyrus.uml.diagram.clazz.lf.autosizeableclasses/src/org/eclipse/papyrus/uml/diagram/clazz/lf/autosizeableclasses/edit/policies/HideableClassElementEditPolicy.java

/*****************************************************************************
 * Copyright (c) 2019 CEA LIST.
 *
 *
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *  Xavier Le Pallec (for CEA LIST) xlepallec@lilo.org - Bug 558456
 *
 *****************************************************************************/

package org.eclipse.papyrus.uml.diagram.clazz.lf.autosizeableclasses.edit.policies;

import org.eclipse.gef.EditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.papyrus.uml.diagram.clazz.lf.autosizeableclasses.preference.Settings;

/**
 * This is an edit policy that inherits from
 * {@link org.eclipse.papyrus.uml.diagram.clazz.lf.autosizeableclasses.edit.policies.HoveringElementEditPolicy}
 * and dedicated to process request / hovering events for elements of an uml
 * class that can potentially be collapsed or expanded.
 * 
 */

public class HideableClassElementEditPolicy extends HoveringElementEditPolicy {

	/**
	 * see
	 * {@link org.eclipse.papyrus.uml.diagram.clazz.lf.autosizeableclasses.edit.policies.HoveringElementEditPolicy#PolicyToInheritFrom(EditPart)}
	 * 
	 * @param editPart edit part which the edit policy is associated to
	 */

	public HideableClassElementEditPolicy(EditPart editPart) {
		super(editPart);
	}

	/**
	 * see
	 * {@link org.eclipse.papyrus.uml.diagram.clazz.lf.autosizeableclasses.edit.policies.HoveringElementEditPolicy}
	 * for global explanation of edit policy and this method. Short summary:
	 * intercept a move (during a creation/drop interaction) over the associated
	 * graphical element
	 * 
	 * @param request the request corresponding to the interaction event
	 */

	@Override
	public Command getCommand(Request request) {
		if (Settings.getInstance().isActivated() && isCreationOrDropRequest(request)) {
			setCurrentRequest(request);
			getStateMachine().getLowEventManager().hoveringAClass(editPart);
		}
		return super.getCommand(request);
	}

}