/*******************************************************************************
* Copyright 2011 Google Inc. All Rights Reserved.
*
* 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
*
* 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 com.google.gdt.eclipse.designer.gwtext.gefTree;
import com.google.gdt.eclipse.designer.gwtext.model.layout.LayoutInfo;
import com.google.gdt.eclipse.designer.gwtext.model.widgets.ContainerInfo;
import org.eclipse.wb.core.gef.command.EditCommand;
import org.eclipse.wb.gef.core.Command;
import org.eclipse.wb.gef.core.EditPart;
import org.eclipse.wb.gef.core.requests.CreateRequest;
import org.eclipse.wb.gef.core.requests.Request;
import org.eclipse.wb.gef.tree.policies.LayoutEditPolicy;
/**
* Implementation of {@link LayoutEditPolicy} for dropping {@link LayoutInfo} on
* {@link ContainerInfo}.
*
* @author scheglov_ke
* @coverage GWTExt.gefTree
*/
public final class DropLayoutEditPolicy extends LayoutEditPolicy {
private final ContainerInfo m_container;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public DropLayoutEditPolicy(ContainerInfo container) {
m_container = container;
}
////////////////////////////////////////////////////////////////////////////
//
// Routing
//
////////////////////////////////////////////////////////////////////////////
@Override
protected boolean isRequestCondition(Request request) {
// we understand only LayoutInfo drop
if (request.getType() == Request.REQ_CREATE) {
CreateRequest createRequest = (CreateRequest) request;
return createRequest.getNewObject() instanceof LayoutInfo;
}
return false;
}
@Override
protected boolean isGoodReferenceChild(Request request, EditPart editPart) {
return false;
}
////////////////////////////////////////////////////////////////////////////
//
// Command
//
////////////////////////////////////////////////////////////////////////////
@Override
protected Command getCreateCommand(Object newObject, Object referenceObject) {
final LayoutInfo newLayout = (LayoutInfo) newObject;
return new EditCommand(m_container) {
@Override
protected void executeEdit() throws Exception {
m_container.setLayout(newLayout);
}
};
}
}