/*******************************************************************************
* 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.gxt.gef.policy;
import com.google.gdt.eclipse.designer.gef.policy.WidgetPositionLayoutEditPolicy;
import com.google.gdt.eclipse.designer.gxt.model.layout.BorderLayoutInfo;
import com.google.gdt.eclipse.designer.model.widgets.WidgetInfo;
import org.eclipse.wb.core.gef.policy.helpers.SelectionPolicyDecorationHelper;
import org.eclipse.wb.core.gef.policy.validator.LayoutRequestValidators;
import org.eclipse.wb.draw2d.geometry.Insets;
import org.eclipse.wb.gef.core.policies.ILayoutRequestValidator;
import org.eclipse.wb.gef.graphical.policies.LayoutEditPolicy;
/**
* {@link LayoutEditPolicy} for {@link BorderLayoutInfo}.
*
* @author scheglov_ke
* @coverage ExtGWT.gef.policy
*/
public final class BorderLayoutEditPolicy
extends
WidgetPositionLayoutEditPolicy<WidgetInfo, String> {
private final BorderLayoutInfo m_layout;
////////////////////////////////////////////////////////////////////////////
//
// Constructor
//
////////////////////////////////////////////////////////////////////////////
public BorderLayoutEditPolicy(BorderLayoutInfo layout) {
super(layout);
m_layout = layout;
new SelectionPolicyDecorationHelper(this) {
};
}
////////////////////////////////////////////////////////////////////////////
//
// Requests
//
////////////////////////////////////////////////////////////////////////////
@Override
protected ILayoutRequestValidator getRequestValidator() {
return LayoutRequestValidators.componentType("com.extjs.gxt.ui.client.widget.BoxComponent");
}
////////////////////////////////////////////////////////////////////////////
//
// Feedbacks
//
////////////////////////////////////////////////////////////////////////////
@Override
protected void addFeedbacks() throws Exception {
addFeedback(0, 0, 1, 0.25, new Insets(0, 0, 1, 0), "North", "NORTH");
addFeedback(0, 0.75, 1, 1, new Insets(1, 0, 0, 0), "South", "SOUTH");
addFeedback(0, 0.25, 0.25, 0.75, new Insets(1, 0, 1, 1), "West", "WEST");
addFeedback(0.75, 0.25, 1, 0.75, new Insets(1, 1, 1, 0), "East", "EAST");
addFeedback(0.25, 0.25, 0.75, 0.75, new Insets(1, 1, 1, 1), "Center", "CENTER");
}
/**
* Adds feedback for given constraints.
*/
private void addFeedback(double px1,
double py1,
double px2,
double py2,
Insets insets,
String hint,
String region) throws Exception {
if (m_layout.getWidget(region) == null) {
super.addFeedback(px1, py1, px2, py2, insets, hint, region);
}
}
////////////////////////////////////////////////////////////////////////////
//
// Implementation of commands
//
////////////////////////////////////////////////////////////////////////////
@Override
protected void command_CREATE(WidgetInfo component, String data) throws Exception {
m_layout.command_CREATE(component, null);
BorderLayoutInfo.getBorderData(component).setRegion(data);
}
@Override
protected void command_MOVE(WidgetInfo component, String data) throws Exception {
BorderLayoutInfo.getBorderData(component).setRegion(data);
}
@Override
protected void command_ADD(WidgetInfo component, String data) throws Exception {
m_layout.command_MOVE(component, null);
BorderLayoutInfo.getBorderData(component).setRegion(data);
}
}