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comparison org.eclipse.draw2d/src/org/eclipse/draw2d/BendpointConnectionRouter.d @ 12:bc29606a740c

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Added dwt-addons in original directory structure of eclipse.org
author Frank Benoit <benoit@tionex.de>
date Sat, 14 Mar 2009 18:23:29 +0100
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11:43904fec5dca 12:bc29606a740c
1 /*******************************************************************************
2 * Copyright (c) 2000, 2005 IBM Corporation and others.
3 * All rights reserved. This program and the accompanying materials
4 * are made available under the terms of the Eclipse Public License v1.0
5 * which accompanies this distribution, and is available at
6 * http://www.eclipse.org/legal/epl-v10.html
7 *
8 * Contributors:
9 * IBM Corporation - initial API and implementation
10 * Port to the D programming language:
11 * Frank Benoit <benoit@tionex.de>
12 *******************************************************************************/
13 module org.eclipse.draw2d.BendpointConnectionRouter;
14
15 import java.lang.all;
16
17 import org.eclipse.draw2d.geometry.Point;
18 import org.eclipse.draw2d.geometry.PointList;
19 import org.eclipse.draw2d.geometry.PrecisionPoint;
20 import org.eclipse.draw2d.AbstractRouter;
21 import org.eclipse.draw2d.Connection;
22 import org.eclipse.draw2d.Bendpoint;
23
24 /**
25 * Routes {@link Connection}s through a <code>List</code> of {@link Bendpoint Bendpoints}.
26 */
27 public class BendpointConnectionRouter
28 : AbstractRouter
29 {
30
31 private Map constraints;
32
33 private static PrecisionPoint A_POINT_;
34 private static PrecisionPoint A_POINT(){
35 if( A_POINT_ is null ){
36 synchronized( BendpointConnectionRouter.classinfo ){
37 if( A_POINT_ is null ){
38 A_POINT_ = new PrecisionPoint();
39 }
40 }
41 }
42 return A_POINT_;
43 }
44
45 public this(){
46 constraints = new HashMap(11);
47 }
48
49 /**
50 * Gets the constraint for the given {@link Connection}.
51 *
52 * @param connection The connection whose constraint we are retrieving
53 * @return The constraint
54 */
55 public Object getConstraint(Connection connection) {
56 return constraints.get(cast(Object)connection);
57 }
58
59 /**
60 * Removes the given connection from the map of constraints.
61 *
62 * @param connection The connection to remove
63 */
64 public void remove(Connection connection) {
65 constraints.remove(cast(Object)connection);
66 }
67
68 /**
69 * Routes the {@link Connection}. Expects the constraint to be a List
70 * of {@link org.eclipse.draw2d.Bendpoint Bendpoints}.
71 *
72 * @param conn The connection to route
73 */
74 public void route(Connection conn) {
75 PointList points = conn.getPoints();
76 points.removeAllPoints();
77
78 List bendpoints = cast(List)getConstraint(conn);
79 if (bendpoints is null)
80 bendpoints = Collections.EMPTY_LIST;
81
82 Point ref1, ref2;
83
84 if (bendpoints.isEmpty()) {
85 ref1 = conn.getTargetAnchor().getReferencePoint();
86 ref2 = conn.getSourceAnchor().getReferencePoint();
87 } else {
88 ref1 = new Point((cast(Bendpoint)bendpoints.get(0)).getLocation());
89 conn.translateToAbsolute(ref1);
90 ref2 = new Point((cast(Bendpoint)bendpoints.get(bendpoints.size() - 1)).getLocation());
91 conn.translateToAbsolute(ref2);
92 }
93
94 A_POINT.setLocation(conn.getSourceAnchor().getLocation(ref1));
95 conn.translateToRelative(A_POINT);
96 points.addPoint(A_POINT);
97
98 for (int i = 0; i < bendpoints.size(); i++) {
99 Bendpoint bp = cast(Bendpoint)bendpoints.get(i);
100 points.addPoint(bp.getLocation());
101 }
102
103 A_POINT.setLocation(conn.getTargetAnchor().getLocation(ref2));
104 conn.translateToRelative(A_POINT);
105 points.addPoint(A_POINT);
106 conn.setPoints(points);
107 }
108
109 /**
110 * Sets the constraint for the given {@link Connection}.
111 *
112 * @param connection The connection whose constraint we are setting
113 * @param constraint The constraint
114 */
115 public void setConstraint(Connection connection, Object constraint) {
116 constraints.put(cast(Object)connection, constraint);
117 }
118
119 }