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comparison dwtx/draw2d/ConnectionAnchorBase.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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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.ConnectionAnchorBase;
14
15 import dwt.dwthelper.utils;
16 import dwtx.dwtxhelper.Collection;
17
18 import dwtx.draw2d.ConnectionAnchor;
19 import dwtx.draw2d.AnchorListener;
20
21 /**
22 * Provides support for a ConnectionAnchor. A ConnectionAnchor is one of the end points
23 * of a {@link Connection}. It holds listeners and notifies them if the anchor is moved.
24 */
25 public abstract class ConnectionAnchorBase
26 : ConnectionAnchor
27 {
28
29 /**
30 * The list of listeners
31 */
32 protected List listeners;
33
34 this(){
35 listeners = new ArrayList(1);
36 }
37
38 /**
39 * @see dwtx.draw2d.ConnectionAnchor#addAnchorListener(AnchorListener)
40 */
41 public void addAnchorListener(AnchorListener listener) {
42 listeners.add(cast(Object)listener);
43 }
44
45 /**
46 * @see dwtx.draw2d.ConnectionAnchor#removeAnchorListener(AnchorListener)
47 */
48 public void removeAnchorListener(AnchorListener listener) {
49 listeners.remove(cast(Object)listener);
50 }
51
52 /**
53 * Notifies all the listeners in the list of a change in position of this anchor. This is
54 * called from one of the implementing anchors when its location is changed.
55 *
56 * @since 2.0
57 */
58 protected void fireAnchorMoved() {
59 Iterator iter = listeners.iterator();
60 while (iter.hasNext())
61 (cast(AnchorListener)iter.next()).anchorMoved(this);
62 }
63
64 }