/*
* Copyright 2005 JBoss Inc
*
* 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.flow.common.editor.policy;
import org.drools.eclipse.flow.common.editor.core.ElementContainer;
import org.drools.eclipse.flow.common.editor.core.ElementWrapper;
import org.drools.eclipse.flow.common.editor.core.command.AddElementCommand;
import org.drools.eclipse.flow.common.editor.core.command.ChangeConstraintCommand;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.XYLayoutEditPolicy;
import org.eclipse.gef.requests.CreateRequest;
/**
* Policy for performing layout of a process.
*/
public class ElementContainerLayoutEditPolicy extends XYLayoutEditPolicy {
protected Command getCreateCommand(CreateRequest request) {
AddElementCommand command = new AddElementCommand();
command.setParent((ElementContainer) getHost().getModel());
ElementWrapper element = (ElementWrapper) request.getNewObject();
element.setConstraint((Rectangle) getConstraintFor(request));
command.setChild(element);
return command;
}
protected Command getDeleteDependantCommand(Request request) {
return null;
}
protected Command createAddCommand(EditPart child, Object constraint) {
// TODO this is needed to allow dragging of elements from one container to another
return null;
}
protected Command createChangeConstraintCommand(EditPart child, Object constraint) {
ChangeConstraintCommand command = new ChangeConstraintCommand();
command.setElement((ElementWrapper) child.getModel());
command.setConstraint((Rectangle)constraint);
return command;
}
}