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/*******************************************************************************
* <copyright>
*
* Copyright (c) 2012 SAP AG and others.
* All rights reserved. This program and the accompanying materials
* are 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:
* Petya Sabeva - initial API, implementation and documentation
*
* </copyright>
*
*******************************************************************************/
package org.eclipse.jpt.jpadiagrameditor.ui.internal.feature;
import static org.eclipse.jpt.jpadiagrameditor.ui.internal.relations.HasReferanceRelation.HasReferenceType.COLLECTION;
import java.util.List;
import org.eclipse.emf.transaction.RecordingCommand;
import org.eclipse.emf.transaction.TransactionalEditingDomain;
import org.eclipse.emf.transaction.util.TransactionUtil;
import org.eclipse.graphiti.features.IAddBendpointFeature;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IAddConnectionContext;
import org.eclipse.graphiti.features.context.IAddContext;
import org.eclipse.graphiti.features.context.impl.AddBendpointContext;
import org.eclipse.graphiti.features.impl.AbstractAddFeature;
import org.eclipse.graphiti.mm.pictograms.ConnectionDecorator;
import org.eclipse.graphiti.mm.pictograms.Diagram;
import org.eclipse.graphiti.mm.pictograms.FreeFormConnection;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;
import org.eclipse.graphiti.services.Graphiti;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.provider.IJPAEditorFeatureProvider;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.provider.IJPAEditorImageCreator;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.provider.JPAEditorImageCreator;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.relations.HasReferanceRelation;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.relations.HasReferanceRelation.HasReferenceType;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.util.JPAEditorUtil;
import org.eclipse.jpt.jpadiagrameditor.ui.internal.util.Wrp;
import org.eclipse.swt.graphics.Point;
public class AddHasReferenceRelationFeature extends AbstractAddFeature {
private static final double START_COEFFICIENT = 0.1;
private IJPAEditorImageCreator imageCreator;
public AddHasReferenceRelationFeature(IFeatureProvider fp) {
this(fp, new JPAEditorImageCreator());
}
public AddHasReferenceRelationFeature(IFeatureProvider fp,
IJPAEditorImageCreator imageCreator) {
super(fp);
this.imageCreator = imageCreator;
}
public boolean canAdd(IAddContext context) {
return true;
}
public PictogramElement add(IAddContext context) {
final IAddConnectionContext addConContext = (IAddConnectionContext) context;
final HasReferanceRelation relation = (HasReferanceRelation)context.getNewObject();
final Diagram diagram = getDiagram();
final Wrp wrp = new Wrp();
TransactionalEditingDomain ted = TransactionUtil.getEditingDomain(diagram);
RecordingCommand rc = new RecordingCommand(ted) {
protected void doExecute() {
FreeFormConnection connection = createConnection(addConContext, relation, diagram);
imageCreator.createHasReferenceConnectionLine(diagram, connection);
getFeatureProvider().putKeyToBusinessObject(relation.getId(), relation);
link(connection, relation);
layoutPictogramElement(connection);
wrp.setObj(connection);
}
};
try {
ted.getCommandStack().execute(rc);
} catch (Exception e){
}
return (PictogramElement)wrp.getObj();
}
private FreeFormConnection createConnection(IAddConnectionContext addConContext, HasReferanceRelation relation,
final Diagram diagram) {
FreeFormConnection connection = getFeatureProvider().getPeServiceUtil().createFreeFormConnection(diagram);
connection.setStart(addConContext.getSourceAnchor());
connection.setEnd(addConContext.getTargetAnchor());
connection.setVisible(true);
connection.setActive(true);
List<Point> points = JPAEditorUtil.createBendPointList(connection, false);
for (int i = 0; i < points.size(); i++) {
Point p = points.get(i);
AddBendpointContext ctx = new AddBendpointContext(connection, p.x, p.y, i);
IAddBendpointFeature ft = getFeatureProvider().getAddBendpointFeature(ctx);
ft.addBendpoint(ctx);
}
addDecorators(connection, relation);
addTextDecorators(connection, relation);
return connection;
}
public IJPAEditorFeatureProvider getFeatureProvider() {
return (IJPAEditorFeatureProvider)super.getFeatureProvider();
}
private void addDecorators(FreeFormConnection c, HasReferanceRelation rel) {
HasReferenceType relType = rel.getReferenceType();
double startCoefficient = START_COEFFICIENT;
double endCoefficient = 1.0 - startCoefficient;
int len = JPAEditorUtil.calcConnectionLength(c);
ConnectionDecorator d1 = imageCreator.createHasReferenceStartConnectionDecorator(c, startCoefficient);
Graphiti.getGaService().setLocation(d1.getGraphicsAlgorithm(), Math.round(len/10), 0);
if (COLLECTION.equals(relType)) {
ConnectionDecorator d = imageCreator.createManyEndDecorator(c, endCoefficient, true);
Graphiti.getGaService().setLocation(d.getGraphicsAlgorithm(),Math.round(-len/10), 0);
}
}
private void addTextDecorators(FreeFormConnection connection, HasReferanceRelation relation) {
imageCreator.createCardinalityConnectionDecorator(getDiagram(), connection, relation.getEmbeddedAnnotatedAttribute().getName(), 1.0);
}
}
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