MessageFeatureContainer.java

/******************************************************************************* 
 * 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.data;

import org.eclipse.bpmn2.Message;
import org.eclipse.bpmn2.RootElement;
import org.eclipse.bpmn2.modeler.core.ModelHandler;
import org.eclipse.bpmn2.modeler.core.features.AbstractBpmnAddFeature;
import org.eclipse.bpmn2.modeler.core.features.BaseElementFeatureContainer;
import org.eclipse.bpmn2.modeler.core.features.DefaultBpmnMoveFeature;
import org.eclipse.bpmn2.modeler.core.features.UpdateBaseElementNameFeature;
import org.eclipse.bpmn2.modeler.core.features.data.AbstractCreateRootElementFeature;
import org.eclipse.bpmn2.modeler.core.utils.AnchorUtil;
import org.eclipse.bpmn2.modeler.core.utils.GraphicsUtil;
import org.eclipse.bpmn2.modeler.core.utils.StyleUtil;
import org.eclipse.bpmn2.modeler.core.utils.GraphicsUtil.Envelope;
import org.eclipse.bpmn2.modeler.ui.ImageProvider;
import org.eclipse.bpmn2.modeler.ui.features.LayoutBaseElementTextFeature;
import org.eclipse.graphiti.features.IAddFeature;
import org.eclipse.graphiti.features.ICreateFeature;
import org.eclipse.graphiti.features.IDeleteFeature;
import org.eclipse.graphiti.features.IDirectEditingFeature;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.ILayoutFeature;
import org.eclipse.graphiti.features.IMoveShapeFeature;
import org.eclipse.graphiti.features.IResizeShapeFeature;
import org.eclipse.graphiti.features.IUpdateFeature;
import org.eclipse.graphiti.features.context.IAddContext;
import org.eclipse.graphiti.features.context.IResizeShapeContext;
import org.eclipse.graphiti.features.impl.DefaultResizeShapeFeature;
import org.eclipse.graphiti.mm.algorithms.Rectangle;
import org.eclipse.graphiti.mm.algorithms.Text;
import org.eclipse.graphiti.mm.algorithms.styles.Orientation;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
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.IPeService;

public class MessageFeatureContainer extends BaseElementFeatureContainer {

	@Override
	public boolean canApplyTo(Object o) {
		return super.canApplyTo(o) && o instanceof Message;
	}

	@Override
	public ICreateFeature getCreateFeature(IFeatureProvider fp) {
		return new CreateMessageFeature(fp);
	}

	@Override
	public IAddFeature getAddFeature(IFeatureProvider fp) {
		return new AbstractBpmnAddFeature(fp) {

			@Override
			public boolean canAdd(IAddContext context) {
				return true;
			}

			@Override
			public PictogramElement add(IAddContext context) {
				IGaService gaService = Graphiti.getGaService();
				IPeService peService = Graphiti.getPeService();
				Message msg = (Message) context.getNewObject();

				int width = context.getWidth() > 0 ? context.getWidth() : 30;
				int height = context.getHeight() > 0 ? context.getHeight() : 20;
				int textArea = 15;

				ContainerShape container = peService.createContainerShape(context.getTargetContainer(), true);
				Rectangle invisibleRect = gaService.createInvisibleRectangle(container);
				gaService.setLocationAndSize(invisibleRect, context.getX(), context.getY(), width, height + textArea);

				Envelope envelope = GraphicsUtil.createEnvelope(invisibleRect, 0, 0, width, height);
				envelope.rect.setFilled(true);
				StyleUtil.applyBGStyle(envelope.rect, this);
				envelope.line.setForeground(manageColor(StyleUtil.CLASS_FOREGROUND));

				Shape textShape = peService.createShape(container, false);
				peService
						.setPropertyValue(textShape, UpdateBaseElementNameFeature.TEXT_ELEMENT, Boolean.toString(true));
				Text text = gaService.createDefaultText(getDiagram(), textShape, msg.getName());
				text.setStyle(StyleUtil.getStyleForText(getDiagram()));
				text.setHorizontalAlignment(Orientation.ALIGNMENT_CENTER);
				text.setVerticalAlignment(Orientation.ALIGNMENT_TOP);
				gaService.setLocationAndSize(text, 0, height, width, textArea);

				peService.createChopboxAnchor(container);
				AnchorUtil.addFixedPointAnchors(container, invisibleRect);

				createDIShape(container, msg);
				layoutPictogramElement(container);
				return container;
			}
		};
	}

	@Override
	public IUpdateFeature getUpdateFeature(IFeatureProvider fp) {
		return new UpdateBaseElementNameFeature(fp);
	}

	@Override
	public IDirectEditingFeature getDirectEditingFeature(IFeatureProvider fp) {
		return null;
	}

	@Override
	public ILayoutFeature getLayoutFeature(IFeatureProvider fp) {
		return new LayoutBaseElementTextFeature(fp) {
			@Override
			public int getMinimumWidth() {
				return 30;
			}
		};
	}

	@Override
	public IMoveShapeFeature getMoveFeature(IFeatureProvider fp) {
		return new DefaultBpmnMoveFeature(fp);
	}

	@Override
	public IResizeShapeFeature getResizeFeature(IFeatureProvider fp) {
		return new DefaultResizeShapeFeature(fp) {
			@Override
			public boolean canResizeShape(IResizeShapeContext context) {
				return false;
			}
		};
	}

	public static class CreateMessageFeature extends AbstractCreateRootElementFeature {

		public CreateMessageFeature(IFeatureProvider fp) {
			super(fp, "Message", "Represents the content of a communication between two Participants");
		}

		@Override
		public RootElement createRootElement() {
			Message message = ModelHandler.FACTORY.createMessage();
			message.setName("Message");
			return message;
		}

		@Override
		public String getStencilImageId() {
			return ImageProvider.IMG_16_MESSAGE;
		}
	}

	@Override
	public IDeleteFeature getDeleteFeature(IFeatureProvider context) {
		return null;
	}
}