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annotate 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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1 /*******************************************************************************
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2 * Copyright (c) 2000, 2005 IBM Corporation and others.
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3 * All rights reserved. This program and the accompanying materials
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4 * are made available under the terms of the Eclipse Public License v1.0
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5 * which accompanies this distribution, and is available at
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6 * http://www.eclipse.org/legal/epl-v10.html
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7 *
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8 * Contributors:
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9 * IBM Corporation - initial API and implementation
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10 * Port to the D programming language:
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11 * Frank Benoit <benoit@tionex.de>
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12 *******************************************************************************/
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13 module dwtx.draw2d.ConnectionAnchorBase;
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14
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15 import dwt.dwthelper.utils;
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16 import dwtx.dwtxhelper.Collection;
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17
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18 import dwtx.draw2d.ConnectionAnchor;
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19 import dwtx.draw2d.AnchorListener;
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20
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21 /**
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22 * Provides support for a ConnectionAnchor. A ConnectionAnchor is one of the end points
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23 * of a {@link Connection}. It holds listeners and notifies them if the anchor is moved.
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24 */
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25 public abstract class ConnectionAnchorBase
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26 : ConnectionAnchor
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27 {
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28
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29 /**
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30 * The list of listeners
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31 */
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32 protected List listeners;
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33
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34 this(){
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35 listeners = new ArrayList(1);
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36 }
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37
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38 /**
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39 * @see dwtx.draw2d.ConnectionAnchor#addAnchorListener(AnchorListener)
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40 */
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41 public void addAnchorListener(AnchorListener listener) {
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42 listeners.add(cast(Object)listener);
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43 }
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44
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45 /**
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46 * @see dwtx.draw2d.ConnectionAnchor#removeAnchorListener(AnchorListener)
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47 */
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48 public void removeAnchorListener(AnchorListener listener) {
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49 listeners.remove(cast(Object)listener);
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50 }
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51
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52 /**
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53 * Notifies all the listeners in the list of a change in position of this anchor. This is
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54 * called from one of the implementing anchors when its location is changed.
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55 *
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56 * @since 2.0
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57 */
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58 protected void fireAnchorMoved() {
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59 Iterator iter = listeners.iterator();
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60 while (iter.hasNext())
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61 (cast(AnchorListener)iter.next()).anchorMoved(this);
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62 }
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63
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64 }