/*
* 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.editpart;
import java.util.ArrayList;
import java.util.List;
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.ModelEvent;
import org.drools.eclipse.flow.common.editor.core.ModelListener;
import org.drools.eclipse.flow.common.editor.policy.ConnectionBendpointEditPolicy;
import org.drools.eclipse.flow.common.editor.policy.ConnectionEditPolicy;
import org.eclipse.draw2d.AbsoluteBendpoint;
import org.eclipse.draw2d.BendpointConnectionRouter;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.PolygonDecoration;
import org.eclipse.draw2d.PolylineConnection;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.editparts.AbstractConnectionEditPart;
import org.eclipse.gef.editpolicies.ConnectionEndpointEditPolicy;
/**
* Implementation of a connection EditPart.
*/
public abstract class ElementConnectionEditPart extends AbstractConnectionEditPart implements ModelListener {
protected void createEditPolicies() {
ConnectionEditPolicy connectionEditPolicy = new ConnectionEditPolicy();
connectionEditPolicy.setDefaultElementConnectionFactory(getDefaultElementConnectionFactory());
installEditPolicy(EditPolicy.CONNECTION_ENDPOINTS_ROLE, new ConnectionEndpointEditPolicy());
installEditPolicy(EditPolicy.CONNECTION_ROLE, connectionEditPolicy);
installEditPolicy(EditPolicy.CONNECTION_BENDPOINTS_ROLE, new ConnectionBendpointEditPolicy());
}
protected abstract ElementConnectionFactory getDefaultElementConnectionFactory();
protected IFigure createFigure() {
PolylineConnection result = new PolylineConnection();
result.setConnectionRouter(new BendpointConnectionRouter());
result.setTargetDecoration(new PolygonDecoration());
return result;
}
public void setSelected(int value) {
super.setSelected(value);
if (value != EditPart.SELECTED_NONE) {
((PolylineConnection)getFigure()).setLineWidth(2);
} else {
((PolylineConnection)getFigure()).setLineWidth(1);
}
}
public void modelChanged(ModelEvent event) {
if (event.getChange() == ElementConnection.CHANGE_BENDPOINTS) {
refreshBendpoints();
} else if (event.getChange() == ElementConnection.CHANGE_LABEL) {
refreshLabel();
}
}
public void activate() {
super.activate();
((ElementConnection) getModel()).addListener(this);
}
public void deactivate() {
((ElementConnection) getModel()).removeListener(this);
super.deactivate();
}
protected void refreshLabel() {
}
protected void refreshBendpoints() {
List bendpoints = ((ElementConnection) getModel()).getBendpoints();
List constraint = new ArrayList();
for (int i = 0; i < bendpoints.size(); i++) {
constraint.add(new AbsoluteBendpoint((Point) bendpoints.get(i)));
}
getConnectionFigure().setRoutingConstraint(constraint);
}
protected void refreshVisuals() {
refreshLabel();
refreshBendpoints();
}
}