/*******************************************************************************
* 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.gef.part;
import com.google.gdt.eclipse.designer.gef.part.UIObjectEditPart;
import com.google.gdt.eclipse.designer.gwtext.gef.policy.DropLayoutEditPolicy;
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.policy.layout.LayoutPolicyUtils;
import org.eclipse.wb.gef.core.EditPart;
import org.eclipse.wb.gef.core.policies.EditPolicy;
import org.eclipse.wb.gef.graphical.policies.LayoutEditPolicy;
/**
* {@link EditPart} for {@link ContainerInfo}.
*
* @author sablin_aa
* @coverage GWTExt.gef.part
*/
public class ContainerEditPart extends UIObjectEditPart {
protected final ContainerInfo m_container;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public ContainerEditPart(ContainerInfo container) {
super(container);
m_container = container;
}
////////////////////////////////////////////////////////////////////////////
//
// Policies
//
////////////////////////////////////////////////////////////////////////////
private LayoutInfo m_currentLayout;
@Override
protected void createEditPolicies() {
super.createEditPolicies();
// support for dropping LayoutInfo's
if (m_container.hasLayout()) {
installEditPolicy(new DropLayoutEditPolicy(m_container));
}
}
@Override
protected void refreshEditPolicies() {
super.refreshEditPolicies();
// support for dropping components
if (m_container.hasLayout()) {
LayoutInfo layout = m_container.getLayout();
if (m_currentLayout != layout) {
LayoutEditPolicy policy = LayoutPolicyUtils.createLayoutEditPolicy(this, layout);
if (policy != null) {
m_currentLayout = layout;
installEditPolicy(EditPolicy.LAYOUT_ROLE, policy);
} else {
installEditPolicy(EditPolicy.LAYOUT_ROLE, null);
}
}
}
}
}