/*******************************************************************************
* Copyright (c) 2007-2009 Red Hat, Inc.
* Distributed under license by Red Hat, Inc. All rights reserved.
* This program is 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
*
* Contributor:
* Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.jboss.tools.hibernate.ui.diagram.editors.command;
import org.eclipse.gef.commands.Command;
import org.jboss.tools.hibernate.ui.diagram.editors.DiagramViewer;
/**
*
* @author Vitali Yemialyanchyk
*/
public class ToggleAssociationCommand extends Command {
protected boolean stateConnectionsVisibilityAssociation;
protected DiagramViewer diagramViewer;
public ToggleAssociationCommand(DiagramViewer diagramViewer) {
this.diagramViewer = diagramViewer;
stateConnectionsVisibilityAssociation =
diagramViewer.getConnectionsVisibilityAssociation();
}
public void execute() {
stateConnectionsVisibilityAssociation =
diagramViewer.getConnectionsVisibilityAssociation();
diagramViewer.setConnectionsVisibilityAssociation(
!stateConnectionsVisibilityAssociation);
}
public void undo() {
diagramViewer.setConnectionsVisibilityAssociation(
stateConnectionsVisibilityAssociation);
}
public boolean canUndo() {
return (diagramViewer != null);
}
}