/*
* Copyright (c) 2008 Stiftung Deutsches Elektronen-Synchrotron,
* Member of the Helmholtz Association, (DESY), HAMBURG, GERMANY.
*
* THIS SOFTWARE IS PROVIDED UNDER THIS LICENSE ON AN "../AS IS" BASIS.
* WITHOUT WARRANTY OF ANY KIND, EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED
* TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE AND
* NON-INFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE
* FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. SHOULD THE SOFTWARE PROVE DEFECTIVE
* IN ANY RESPECT, THE USER ASSUMES THE COST OF ANY NECESSARY SERVICING, REPAIR OR
* CORRECTION. THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS LICENSE.
* NO USE OF ANY SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER THIS DISCLAIMER.
* DESY HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES, ENHANCEMENTS,
* OR MODIFICATIONS.
* THE FULL LICENSE SPECIFYING FOR THE SOFTWARE THE REDISTRIBUTION, MODIFICATION,
* USAGE AND OTHER RIGHTS AND OBLIGATIONS IS INCLUDED WITH THE DISTRIBUTION OF THIS
* PROJECT IN THE FILE LICENSE.HTML. IF THE LICENSE IS NOT INCLUDED YOU MAY FIND A COPY
* AT HTTP://WWW.DESY.DE/LEGAL/LICENSE.HTM
*/
package org.csstudio.sds.ui.internal.layers;
import org.csstudio.sds.internal.model.Layer;
import org.csstudio.sds.internal.model.LayerSupport;
import org.eclipse.gef.commands.Command;
import org.eclipse.jface.action.IAction;
/**
* Action that moves a layer down.
*
* @author swende
*
*/
public final class MoveLayerDownAction extends AbstractLayerAction {
/**
* {@inheritDoc}
*/
@Override
protected void selectedLayerChanged(final Layer layer, final LayerSupport layerSupport, final IAction action) {
action.setEnabled(layerSupport.getLayerIndex(layer)!=
layerSupport.getLayers().size()-1);
}
/**
* {@inheritDoc}
*/
@Override
protected Command createCommand(final Layer selectedLayer,
final LayerSupport layerSupport, final IAction action) {
Command result = null;
if (selectedLayer != null && layerSupport != null) {
int oldIndex = layerSupport.getLayerIndex(selectedLayer);
int layerCount = layerSupport.getLayers().size();
if (oldIndex <= layerCount - 2) {
result = new MoveLayerCommand(layerSupport, selectedLayer, oldIndex + 1);
}
}
return result;
}
}