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comparison dwtx/draw2d/ConnectionRouter.d @ 98:95307ad235d9

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Added Draw2d code, still work in progress
author Frank Benoit <benoit@tionex.de>
date Sun, 03 Aug 2008 00:52:14 +0200
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children 1082a0fc2bb8
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96:b492ba44e44d 98:95307ad235d9
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 dwtx.draw2d.ConnectionRouter;
14
15 import dwt.dwthelper.utils;
16
17 import dwtx.draw2d.geometry.Point;
18 import dwtx.draw2d.geometry.PointList;
19 import dwtx.draw2d.AnchorListener;
20 import dwtx.draw2d.AbstractRouter;
21 import dwtx.draw2d.Connection;
22
23 /**
24 * Routes a {@link Connection}, possibly using a constraint.
25 */
26 public interface ConnectionRouter {
27
28 /**
29 * Returns the constraint for the Connection.
30 * @param connection The connection
31 * @return The constraint
32 */
33 Object getConstraint(Connection connection);
34
35 /**
36 * Invalidates the given Connection.
37 * @param connection The connection to be invalidated
38 */
39 void invalidate(Connection connection);
40
41 /**
42 * Routes the Connection.
43 * @param connection The Connection to route
44 */
45 void route(Connection connection);
46
47 /**
48 * Removes the Connection from this router.
49 * @param connection The Connection to remove
50 */
51 void remove(Connection connection);
52
53 /**
54 * Maps the given constraint to the given Connection.
55 * @param connection The Connection
56 * @param constraint The constraint
57 */
58 void setConstraint(Connection connection, Object constraint);
59
60
61 }
62 /**
63 * Routes Connections directly from the source anchor to the target anchor with no
64 * bendpoints in between.
65 */
66 class NullConnectionRouter
67 : AbstractRouter
68 {
69
70 /**
71 * Constructs a new NullConnectionRouter.
72 */
73 this() { }
74
75 /**
76 * Routes the given Connection directly between the source and target anchors.
77 * @param conn the connection to be routed
78 */
79 public void route(Connection conn) {
80 PointList points = conn.getPoints();
81 points.removeAllPoints();
82 Point p;
83 conn.translateToRelative(p = getStartPoint(conn));
84 points.addPoint(p);
85 conn.translateToRelative(p = getEndPoint(conn));
86 points.addPoint(p);
87 conn.setPoints(points);
88 }
89 }
90
91 /**
92 * The default router for Connections.
93 */
94 public static const ConnectionRouter ConnectionRouter_NULL;
95
96 static this(){
97 ConnectionRouter_NULL = new NullConnectionRouter();
98 }
99