package org.activiti.designer.features;
import org.activiti.bpmn.model.EndEvent;
import org.activiti.bpmn.model.Event;
import org.activiti.bpmn.model.Lane;
import org.activiti.bpmn.model.SubProcess;
import org.activiti.designer.PluginImage;
import org.activiti.designer.util.eclipse.ActivitiUiUtil;
import org.activiti.designer.util.style.StyleUtil;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IAddContext;
import org.eclipse.graphiti.mm.algorithms.Ellipse;
import org.eclipse.graphiti.mm.algorithms.Image;
import org.eclipse.graphiti.mm.pictograms.BoxRelativeAnchor;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.Diagram;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;
import org.eclipse.graphiti.mm.pictograms.Shape;
import org.eclipse.graphiti.services.Graphiti;
import org.eclipse.graphiti.services.IGaService;
import org.eclipse.graphiti.services.IPeCreateService;
public class AddSignalCatchingEventFeature extends AddEventFeature {
public AddSignalCatchingEventFeature(IFeatureProvider fp) {
super(fp);
}
@Override
public PictogramElement add(IAddContext context) {
final Event addedEvent = (Event) context.getNewObject();
final ContainerShape parent = context.getTargetContainer();
// CONTAINER SHAPE WITH CIRCLE
final IPeCreateService peCreateService = Graphiti.getPeCreateService();
final ContainerShape containerShape = peCreateService.createContainerShape(parent, true);
// check whether the context has a size (e.g. from a create feature)
// otherwise define a default size for the shape
final int width = context.getWidth() <= 0 ? 35 : context.getWidth();
final int height = context.getHeight() <= 0 ? 35 : context.getHeight();
final IGaService gaService = Graphiti.getGaService();
Ellipse circle;
{
final Ellipse invisibleCircle = gaService.createEllipse(containerShape);
invisibleCircle.setFilled(false);
invisibleCircle.setLineVisible(false);
gaService.setLocationAndSize(invisibleCircle, context.getX(), context.getY(), width, height);
// create and set visible circle inside invisible circle
circle = gaService.createEllipse(invisibleCircle);
circle.setParentGraphicsAlgorithm(invisibleCircle);
circle.setStyle(StyleUtil.getStyleForEvent(getDiagram()));
gaService.setLocationAndSize(circle, 0, 0, width, height);
// create link and wire it
link(containerShape, addedEvent);
}
{
final Shape shape = peCreateService.createShape(containerShape, false);
final Image image = gaService.createImage(shape, PluginImage.IMG_BOUNDARY_SIGNAL.getImageKey());
image.setWidth(20);
image.setHeight(20);
gaService.setLocationAndSize(image, (width - 20) / 2, (height - 20) / 2, 20, 20);
}
// add a chopbox anchor to the shape
peCreateService.createChopboxAnchor(containerShape);
if (!(addedEvent instanceof EndEvent)) {
// create an additional box relative anchor at middle-right
final BoxRelativeAnchor boxAnchor = peCreateService.createBoxRelativeAnchor(containerShape);
boxAnchor.setRelativeWidth(1.0);
boxAnchor.setRelativeHeight(0.51);
boxAnchor.setReferencedGraphicsAlgorithm(circle);
final Ellipse ellipse = ActivitiUiUtil.createInvisibleEllipse(boxAnchor, gaService);
gaService.setLocationAndSize(ellipse, 0, 0, 0, 0);
}
layoutPictogramElement(containerShape);
return containerShape;
}
@Override
public boolean canAdd(IAddContext context) {
if (context.getNewObject() instanceof Event) {
Object parentObject = getBusinessObjectForPictogramElement(context.getTargetContainer());
if (context.getTargetContainer() instanceof Diagram || parentObject instanceof SubProcess || parentObject instanceof Lane) {
return true;
}
}
return false;
}
}