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/*****************************************************************************
* Copyright (c) 2010 CEA
*
*
* 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:
* Soyatec - Initial API and implementation
*
*****************************************************************************/
package org.eclipse.papyrus.uml.diagram.sequence.edit.policies;
import java.util.ArrayList;
import java.util.List;
import org.eclipse.draw2d.Connection;
import org.eclipse.draw2d.ConnectionLocator;
import org.eclipse.draw2d.Ellipse;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.geometry.Dimension;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.PointList;
import org.eclipse.gef.ConnectionEditPart;
import org.eclipse.gef.DragTracker;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.ConnectionEndpointEditPolicy;
import org.eclipse.gef.handles.ConnectionEndpointHandle;
import org.eclipse.gef.requests.ReconnectRequest;
import org.eclipse.gef.tools.ConnectionEndpointTracker;
import org.eclipse.papyrus.uml.diagram.sequence.edit.parts.AnnotatedLinkEditPart;
import org.eclipse.swt.SWT;
/**
* An editpolicy for handling reconnections of an {@link AnnotatedLinkEditPart}.
*
* @see AnnotatedLinkStartEditPolicy
* @see AnnotatedLinkEndEditPolicy
*
* @author Jin Liu (jin.liu@soyatec.com)
*/
public class AnnotatedLinkEndpointEditPolicy extends ConnectionEndpointEditPolicy {
private IFigure anchorFeedback;
@Override
public void eraseSourceFeedback(Request request) {
if (AnnotatedLinkStartEditPolicy.REQ_ANNOTATED_LINK_REORIENT_START.equals(request.getType()) || AnnotatedLinkEndEditPolicy.REQ_ANNOTATED_LINK_REORIENT_END.equals(request.getType())) {
eraseConnectionMoveFeedback((ReconnectRequest) request);
}
}
@Override
public void showSourceFeedback(Request request) {
if (AnnotatedLinkStartEditPolicy.REQ_ANNOTATED_LINK_REORIENT_START.equals(request.getType()) || AnnotatedLinkEndEditPolicy.REQ_ANNOTATED_LINK_REORIENT_END.equals(request.getType())) {
showConnectionMoveFeedback((ReconnectRequest) request);
}
}
@Override
protected void showConnectionMoveFeedback(ReconnectRequest request) {
super.showConnectionMoveFeedback(request);
EditPart target = request.getTarget();
boolean showFeedback = target != null;
if (target != null) {
Command command = target.getCommand(request);
showFeedback = command != null && command.canExecute();
}
if (showFeedback) {
Point location = null;
Connection connection = getConnection();
PointList points = connection.getPoints().getCopy();
if (request.isMovingStartAnchor()) {
location = points.getFirstPoint();
} else {
location = points.getLastPoint();
}
connection.translateToAbsolute(location);
setFeedbackLocation(getAnchorFeedback(), location);
} else {
if (anchorFeedback != null && anchorFeedback.getParent() != null) {
removeFeedback(anchorFeedback);
}
anchorFeedback = null;
}
}
@Override
protected void eraseConnectionMoveFeedback(ReconnectRequest request) {
super.eraseConnectionMoveFeedback(request);
if (anchorFeedback != null && anchorFeedback.getParent() != null) {
removeFeedback(anchorFeedback);
}
anchorFeedback = null;
}
private void setFeedbackLocation(IFigure feedback, Point location) {
if (feedback == null || location == null) {
return;
}
Point p = location.getCopy();
Dimension d = feedback.getSize();
p.x = p.x - d.width / 2;
p.y = p.y - d.height / 2;
feedback.translateToRelative(p);
feedback.setLocation(p);
}
private IFigure getAnchorFeedback() {
if (anchorFeedback == null || anchorFeedback.getParent() == null) {
Ellipse feedback = new Ellipse();
feedback.setLineWidth(2);
feedback.setAntialias(SWT.ON);
feedback.setSize(10, 10);
getFeedbackLayer().add(feedback);
anchorFeedback = feedback;
}
return anchorFeedback;
}
@SuppressWarnings({ "rawtypes", "unchecked" })
@Override
protected List createSelectionHandles() {
List list = new ArrayList();
list.add(new ConnectionEndpointHandle((ConnectionEditPart) getHost(), ConnectionLocator.SOURCE) {
@Override
protected DragTracker createDragTracker() {
ConnectionEndpointTracker tracker = new ConnectionEndpointTracker((ConnectionEditPart) getOwner()) {
@Override
protected Request createTargetRequest() {
ReconnectRequest request = new ReconnectRequest(getCommandName()) {
@Override
public boolean isMovingStartAnchor() {
return true;
}
};
request.setConnectionEditPart(getConnectionEditPart());
return request;
}
};
tracker.setCommandName(AnnotatedLinkStartEditPolicy.REQ_ANNOTATED_LINK_REORIENT_START);
tracker.setDefaultCursor(getCursor());
return tracker;
}
});
list.add(new ConnectionEndpointHandle((ConnectionEditPart) getHost(), ConnectionLocator.TARGET) {
@Override
protected DragTracker createDragTracker() {
ConnectionEndpointTracker tracker = new ConnectionEndpointTracker((ConnectionEditPart) getOwner()) {
@Override
protected Request createTargetRequest() {
ReconnectRequest request = new ReconnectRequest(getCommandName()) {
@Override
public boolean isMovingStartAnchor() {
return false;
}
};
request.setConnectionEditPart(getConnectionEditPart());
return request;
}
};
tracker.setCommandName(AnnotatedLinkEndEditPolicy.REQ_ANNOTATED_LINK_REORIENT_END);
tracker.setDefaultCursor(getCursor());
return tracker;
}
});
return list;
}
}
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