| /******************************************************************************* |
| * Copyright (c) 2008, 2010 IBM Corporation 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: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.gef.handles; |
| |
| import org.eclipse.core.runtime.Assert; |
| |
| import org.eclipse.draw2d.ConnectionLocator; |
| |
| import org.eclipse.gef.ConnectionEditPart; |
| import org.eclipse.gef.DragTracker; |
| import org.eclipse.gef.RequestConstants; |
| import org.eclipse.gef.tools.ConnectionEndpointTracker; |
| |
| /** |
| * A handle used at the start or end of the |
| * {@link org.eclipse.draw2d.Connection}. A ConnectionEndpointHandle may be |
| * extended rather than using the final {@link ConnectionStartHandle} or |
| * {@link ConnectionEndHandle} |
| * |
| * @author Anthony Hunter |
| * @since 3.4 |
| */ |
| public class ConnectionEndpointHandle extends ConnectionHandle { |
| |
| /** |
| * Caches whether the handle is for the source or target endpoint. endPoint |
| * is either {@link ConnectionLocator#SOURCE} or |
| * {@link ConnectionLocator#TARGET}. |
| */ |
| private int endPoint; |
| |
| /** |
| * Creates a new ConnectionStartHandle, sets its owner to <code>owner</code> |
| * , and sets its locator to a {@link ConnectionLocator}. |
| * |
| * @param owner |
| * the ConnectionEditPart owner |
| * @param endPoint |
| * one of {@link ConnectionLocator#SOURCE} or |
| * {@link ConnectionLocator#TARGET}. |
| */ |
| public ConnectionEndpointHandle(ConnectionEditPart owner, int endPoint) { |
| setOwner(owner); |
| Assert.isTrue(endPoint == ConnectionLocator.SOURCE |
| || endPoint == ConnectionLocator.TARGET); |
| this.endPoint = endPoint; |
| setLocator(new ConnectionLocator(getConnection(), endPoint)); |
| } |
| |
| /** |
| * Creates a new ConnectionStartHandle and sets its owner to |
| * <code>owner</code>. If the handle is fixed, it cannot be dragged. |
| * |
| * @param owner |
| * the ConnectionEditPart owner |
| * @param fixed |
| * if true, handle cannot be dragged. |
| * @param endPoint |
| * one of {@link ConnectionLocator#SOURCE} or |
| * {@link ConnectionLocator#TARGET}. |
| */ |
| public ConnectionEndpointHandle(ConnectionEditPart owner, boolean fixed, |
| int endPoint) { |
| super(fixed); |
| setOwner(owner); |
| Assert.isTrue(endPoint == ConnectionLocator.SOURCE |
| || endPoint == ConnectionLocator.TARGET); |
| this.endPoint = endPoint; |
| setLocator(new ConnectionLocator(getConnection(), endPoint)); |
| } |
| |
| /** |
| * Creates a new ConnectionStartHandle. |
| * |
| * @param endPoint |
| * one of {@link ConnectionLocator#SOURCE} or |
| * {@link ConnectionLocator#TARGET}. |
| */ |
| public ConnectionEndpointHandle(int endPoint) { |
| Assert.isTrue(endPoint == ConnectionLocator.SOURCE |
| || endPoint == ConnectionLocator.TARGET); |
| this.endPoint = endPoint; |
| } |
| |
| /** |
| * Creates and returns a new {@link ConnectionEndpointTracker}. |
| * |
| * @return the new ConnectionEndpointTracker |
| */ |
| protected DragTracker createDragTracker() { |
| if (isFixed()) |
| return null; |
| ConnectionEndpointTracker tracker; |
| tracker = new ConnectionEndpointTracker((ConnectionEditPart) getOwner()); |
| if (endPoint == ConnectionLocator.SOURCE) { |
| tracker.setCommandName(RequestConstants.REQ_RECONNECT_SOURCE); |
| } else { |
| tracker.setCommandName(RequestConstants.REQ_RECONNECT_TARGET); |
| } |
| tracker.setDefaultCursor(getCursor()); |
| return tracker; |
| } |
| |
| /** |
| * Return the endpoint handle. |
| * |
| * @return the endPoint handle, which is is either |
| * {@link ConnectionLocator#SOURCE} or |
| * {@link ConnectionLocator#TARGET}. |
| * @since 3.5 |
| */ |
| public int getEndPoint() { |
| return endPoint; |
| } |
| |
| } |