/*
* Copyright 2010 Red Hat, Inc. and/or its affiliates.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.drools.eclipse.editors;
import org.eclipse.draw2d.ScalableFigure;
import org.eclipse.gef.editparts.ZoomManager;
import org.eclipse.gef.ui.actions.ZoomOutAction;
/**
* Similar to ZoomOutAction but adds setZoomManager(..) functionality.
*
* ZoomOutAction2 provides default constructor for initializing
* ZoomOutAction without the need for ZoomManager.
*
* Please note that ZoomOutAction2 is not very functional until it has
* correct zoomManager set by setZoomManager(ZoomManager manager).<br/>
*
* setZoomManager(ZoomManager manager) can be used several times.
*/
public class ZoomOutAction2 extends ZoomOutAction {
final private static ZoomManager FAKE_ZOOM_MANAGER = new ZoomManager( (ScalableFigure) null,
null );
/**
* Default constructor to allow ZoomOutActions without specified
* ZoomManager.
*/
public ZoomOutAction2() {
super( FAKE_ZOOM_MANAGER );
}
/**
* Replaces existing zoomManager with the new one.
*
* Implementation is null-safe.
*
* @param newManager new zoom manager
*/
public void setZoomManager(ZoomManager manager) {
if ( zoomManager != null ) {
zoomManager.removeZoomListener( this );
}
zoomManager = manager;
if ( zoomManager != null ) {
zoomManager.addZoomListener( this );
}
}
}