/*******************************************************************************
* Copyright (c) 2011 Red Hat, Inc.
* All rights reserved.
* This program is 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
*
* Contributors:
* Red Hat, Inc. - initial API and implementation
******************************************************************************/
package org.eclipse.bpmn2.modeler.ui.features.flow;
import java.io.IOException;
import org.eclipse.bpmn2.BaseElement;
import org.eclipse.bpmn2.FlowNode;
import org.eclipse.bpmn2.InteractionNode;
import org.eclipse.bpmn2.MessageFlow;
import org.eclipse.bpmn2.Participant;
import org.eclipse.bpmn2.modeler.core.Activator;
import org.eclipse.bpmn2.modeler.core.ModelHandler;
import org.eclipse.bpmn2.modeler.core.features.BaseElementConnectionFeatureContainer;
import org.eclipse.bpmn2.modeler.core.features.BaseElementReconnectionFeature;
import org.eclipse.bpmn2.modeler.core.features.BusinessObjectUtil;
import org.eclipse.bpmn2.modeler.core.features.MultiUpdateFeature;
import org.eclipse.bpmn2.modeler.core.features.UpdateBaseElementNameFeature;
import org.eclipse.bpmn2.modeler.core.features.flow.AbstractAddFlowFeature;
import org.eclipse.bpmn2.modeler.core.features.flow.AbstractCreateFlowFeature;
import org.eclipse.bpmn2.modeler.core.utils.StyleUtil;
import org.eclipse.bpmn2.modeler.ui.ImageProvider;
import org.eclipse.graphiti.features.IAddFeature;
import org.eclipse.graphiti.features.ICreateConnectionFeature;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.IReconnectionFeature;
import org.eclipse.graphiti.features.IUpdateFeature;
import org.eclipse.graphiti.features.context.ICreateConnectionContext;
import org.eclipse.graphiti.features.context.IReconnectionContext;
import org.eclipse.graphiti.mm.algorithms.Ellipse;
import org.eclipse.graphiti.mm.algorithms.Polyline;
import org.eclipse.graphiti.mm.algorithms.styles.LineStyle;
import org.eclipse.graphiti.mm.pictograms.Connection;
import org.eclipse.graphiti.mm.pictograms.ConnectionDecorator;
import org.eclipse.graphiti.services.Graphiti;
import org.eclipse.graphiti.services.IGaService;
import org.eclipse.graphiti.services.IPeService;
import org.eclipse.graphiti.util.IColorConstant;
public class MessageFlowFeatureContainer extends BaseElementConnectionFeatureContainer {
@Override
public boolean canApplyTo(Object o) {
return super.canApplyTo(o) && o instanceof MessageFlow;
}
@Override
public IAddFeature getAddFeature(IFeatureProvider fp) {
return new AbstractAddFlowFeature(fp) {
@Override
protected void decorateConnectionLine(Polyline connectionLine) {
connectionLine.setLineStyle(LineStyle.DASH);
}
@Override
protected void createConnectionDecorators(Connection connection) {
IPeService peService = Graphiti.getPeService();
IGaService gaService = Graphiti.getGaService();
ConnectionDecorator endDecorator = peService.createConnectionDecorator(connection, false, 1.0, true);
ConnectionDecorator startDecorator = peService.createConnectionDecorator(connection, false, 0, true);
int w = 5;
int l = 15;
Polyline polyline = gaService.createPolygon(endDecorator, new int[] { -l, w, 0, 0, -l, -w, -l, w });
polyline.setForeground(manageColor(StyleUtil.CLASS_FOREGROUND));
polyline.setBackground(manageColor(IColorConstant.WHITE));
polyline.setFilled(true);
polyline.setLineWidth(1);
Ellipse ellipse = gaService.createEllipse(startDecorator);
ellipse.setForeground(manageColor(StyleUtil.CLASS_FOREGROUND));
ellipse.setBackground(manageColor(IColorConstant.WHITE));
ellipse.setFilled(true);
ellipse.setLineWidth(1);
gaService.setSize(ellipse, 10, 10);
}
@Override
protected Class<? extends BaseElement> getBoClass() {
return MessageFlow.class;
}
};
}
@Override
public ICreateConnectionFeature getCreateConnectionFeature(IFeatureProvider fp) {
return new CreateMessageFlowFeature(fp);
}
@Override
public IUpdateFeature getUpdateFeature(IFeatureProvider fp) {
MultiUpdateFeature multiUpdate = new MultiUpdateFeature(fp);
multiUpdate.addUpdateFeature(new UpdateBaseElementNameFeature(fp));
// TODO: any other updates needed?
return multiUpdate;
}
@Override
public IReconnectionFeature getReconnectionFeature(IFeatureProvider fp) {
return new MessageFlowReconnectionFeature(fp);
}
public static class CreateMessageFlowFeature extends AbstractCreateFlowFeature<InteractionNode, InteractionNode> {
public CreateMessageFlowFeature(IFeatureProvider fp) {
super(fp, "Message Flow", "Represents message between two participants");
}
@Override
public boolean canCreate(ICreateConnectionContext context) {
InteractionNode source = getSourceBo(context);
InteractionNode target = getTargetBo(context);
return super.canCreate(context) && isDifferentParticipants(source, target);
}
@Override
protected String getStencilImageId() {
return ImageProvider.IMG_16_MESSAGE_FLOW;
}
@Override
protected BaseElement createFlow(ModelHandler mh, InteractionNode source, InteractionNode target) {
MessageFlow flow = mh.createMessageFlow(source, target);
flow.setName("");
return flow;
}
@Override
protected Class<InteractionNode> getSourceClass() {
return InteractionNode.class;
}
@Override
protected Class<InteractionNode> getTargetClass() {
return InteractionNode.class;
}
private boolean isDifferentParticipants(InteractionNode source, InteractionNode target) {
if (source == null || target == null) {
return true;
}
boolean different = false;
try {
ModelHandler handler = ModelHandler.getInstance(getDiagram());
Participant sourceParticipant = handler.getParticipant(source);
Participant targetParticipant = handler.getParticipant(target);
different = !sourceParticipant.equals(targetParticipant);
} catch (IOException e) {
Activator.logError(e);
}
return different;
}
}
public static class MessageFlowReconnectionFeature extends BaseElementReconnectionFeature {
public MessageFlowReconnectionFeature(IFeatureProvider fp) {
super(fp);
// TODO Auto-generated constructor stub
}
@Override
public boolean canReconnect(IReconnectionContext context) {
if (super.canReconnect(context)) {
BaseElement targetElement = BusinessObjectUtil.getFirstElementOfType(context.getTargetPictogramElement(), BaseElement.class);
return targetElement instanceof Participant;
}
return false;
}
}
}