| /****************************************************************************** |
| * Copyright (c) 2008 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.gmf.runtime.draw2d.ui.graph; |
| |
| import org.eclipse.draw2d.geometry.PointList; |
| import org.eclipse.draw2d.graph.Edge; |
| import org.eclipse.draw2d.graph.Node; |
| |
| /** |
| * Implementation of Edge that: |
| * <li> Can connect border node(s) |
| * <li> Can be routed obliquely or orthogonally |
| * |
| * @author aboyko |
| * @since 2.1 |
| */ |
| public class ConstrainedEdge extends Edge { |
| |
| public static String DEFAULT_ROUTING_STYLE = "Default"; //$NON-NLS-1$ |
| public static String ORTHOGONAL_ROUTING_STYLE = "Orthogonal"; //$NON-NLS-1$ |
| |
| private String style = DEFAULT_ROUTING_STYLE; |
| |
| BorderNode sourceConstraint = null; |
| BorderNode targetConstraint = null; |
| |
| PointList startingRoutedPoints = new PointList(); |
| PointList endingRoutedPoints = new PointList(); |
| |
| /** |
| * Constructs a new edge with the given source and target nodes. All other fields will |
| * have their default values. |
| * @param source the source Node |
| * @param target the target Node |
| * @since 2.1 |
| */ |
| public ConstrainedEdge(Node source, Node target) { |
| this(null, source, target); |
| } |
| |
| /** |
| * Constructs a new edge with the given source, target, delta, and weight. |
| * @param source the source Node |
| * @param target the target Node |
| * @param delta the minimum edge span |
| * @param weight the weight hint |
| * @since 2.1 |
| */ |
| public ConstrainedEdge(Node source, Node target, int delta, int weight) { |
| this(source, target); |
| this.delta = delta; |
| this.weight = weight; |
| } |
| |
| /** |
| * Constructs a new edge with the given data object, source, and target node. |
| * @param data an arbitrary data object |
| * @param source the source node |
| * @param target the target node |
| * @since 2.1 |
| */ |
| public ConstrainedEdge(Object data, Node source, Node target) { |
| super(data, source, target); |
| if (source instanceof BorderNode) { |
| sourceConstraint = (BorderNode)source; |
| this.source = sourceConstraint.borderNodeParent; |
| this.source.outgoing.add(this); |
| sourceConstraint.addOutgoingEdge(this); |
| } |
| if (target instanceof BorderNode) { |
| targetConstraint = (BorderNode)target; |
| this.target = targetConstraint.borderNodeParent; |
| this.target.incoming.add(this); |
| targetConstraint.addIncomingEdge(this); |
| } |
| if (this.source.equals(this.target)) { |
| throw new RuntimeException("Edges between border nodes on the same parent or border node and its parent are disallowed."); //$NON-NLS-1$ |
| } |
| } |
| |
| /** |
| * Gets the routing style for the edge |
| * @return the style constant |
| * @since 2.1 |
| */ |
| public String getStyle() { |
| return style; |
| } |
| |
| /** |
| * Sets the routing style for the edge (orthogonal or default) |
| * @param style the style constant |
| * @since 2.1 |
| */ |
| public void setStyle(String style) { |
| this.style = style; |
| } |
| |
| /* (non-Javadoc) |
| * @see org.eclipse.draw2d.graph.Edge#invert() |
| */ |
| public void invert() { |
| super.invert(); |
| |
| if (sourceConstraint != null) { |
| sourceConstraint.outgoingJointEdges.edges.remove(this); |
| } |
| if (targetConstraint != null) { |
| targetConstraint.incomingJointEdges.edges.remove(this); |
| } |
| |
| BorderNode temp = sourceConstraint; |
| sourceConstraint = targetConstraint; |
| targetConstraint = temp; |
| |
| if (sourceConstraint != null) { |
| sourceConstraint.outgoingJointEdges.edges.add(this); |
| } |
| if (targetConstraint != null) { |
| targetConstraint.incomingJointEdges.edges.add(this); |
| } |
| } |
| |
| } |