/*
* 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.ElementConnection;
import org.drools.eclipse.flow.common.editor.core.ElementConnectionFactory;
import org.drools.eclipse.flow.common.editor.core.ElementWrapper;
import org.drools.eclipse.flow.common.editor.core.ProcessWrapper;
import org.drools.eclipse.flow.common.editor.core.command.DeleteConnectionCommand;
import org.drools.eclipse.flow.common.editor.core.command.SplitConnectionCommand;
import org.drools.eclipse.flow.common.editor.editpart.ElementConnectionEditPart;
import org.eclipse.draw2d.PolylineConnection;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.requests.CreateRequest;
import org.eclipse.gef.requests.GroupRequest;
/**
* Policy for editing connections.
*/
public class ConnectionEditPolicy extends org.eclipse.gef.editpolicies.ConnectionEditPolicy {
private ElementConnectionFactory elementConnectionFactory;
public void setDefaultElementConnectionFactory(ElementConnectionFactory factory) {
if (factory == null) {
throw new IllegalArgumentException("ElementConnectionFactory is null");
}
this.elementConnectionFactory = factory;
}
public ElementConnectionFactory getDefaultElementConnectionFactory() {
return elementConnectionFactory;
}
public Command getCommand(Request request) {
if (REQ_CREATE.equals(request.getType()))
return getSplitTransitionCommand(request);
return super.getCommand(request);
}
private PolylineConnection getConnectionFigure() {
return ((PolylineConnection) ((ElementConnectionEditPart) getHost()).getFigure());
}
protected Command getDeleteCommand(GroupRequest request) {
DeleteConnectionCommand cmd = new DeleteConnectionCommand();
ElementConnection connection = (ElementConnection) getHost().getModel();
cmd.setAntecedentTaskConnection(connection);
cmd.setSource(connection.getSource());
cmd.setTarget(connection.getTarget());
return cmd;
}
protected Command getSplitTransitionCommand(Request request) {
// TODO error when using this split, nodes do not know connections
if (elementConnectionFactory == null) {
throw new IllegalStateException("DefaultElementConnectionFactory is null");
}
SplitConnectionCommand cmd = new SplitConnectionCommand();
cmd.setElementConnection(((ElementConnection) getHost().getModel()));
cmd.setNewSecondConnection(elementConnectionFactory.createElementConnection());
cmd.setParent(((ProcessWrapper) ((ElementConnectionEditPart) getHost())
.getSource().getParent().getModel()));
cmd.setNewElement(((ElementWrapper) ((CreateRequest) request).getNewObject()));
return cmd;
}
public EditPart getTargetEditPart(Request request) {
if (REQ_CREATE.equals(request.getType()))
return getHost();
return null;
}
public void eraseTargetFeedback(Request request) {
if (REQ_CREATE.equals(request.getType()))
getConnectionFigure().setLineWidth(1);
}
public void showTargetFeedback(Request request) {
if (REQ_CREATE.equals(request.getType()))
getConnectionFigure().setLineWidth(2);
}
}