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/*******************************************************************************
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* Copyright (c) 2000, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package org.eclipse.draw2d;
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import java.util.ArrayList;
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import java.util.Iterator;
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import java.util.List;
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/**
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* Provides support for a ConnectionAnchor. A ConnectionAnchor is one of the end
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* points of a {@link Connection}. It holds listeners and notifies them if the
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* anchor is moved.
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*/
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public abstract class ConnectionAnchorBase implements ConnectionAnchor {
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/**
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* The list of listeners
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*/
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protected List listeners = new ArrayList(1);
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/**
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* @see org.eclipse.draw2d.ConnectionAnchor#addAnchorListener(AnchorListener)
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*/
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public void addAnchorListener(AnchorListener listener) {
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listeners.add(listener);
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}
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/**
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* @see org.eclipse.draw2d.ConnectionAnchor#removeAnchorListener(AnchorListener)
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*/
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public void removeAnchorListener(AnchorListener listener) {
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listeners.remove(listener);
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}
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/**
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* Notifies all the listeners in the list of a change in position of this
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* anchor. This is called from one of the implementing anchors when its
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* location is changed.
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*
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* @since 2.0
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*/
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protected void fireAnchorMoved() {
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Iterator iter = listeners.iterator();
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while (iter.hasNext())
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((AnchorListener) iter.next()).anchorMoved(this);
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}
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}
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