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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 org.eclipse.draw2d.geometry.Point;
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/**
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* An object to which a {@link Connection} will be anchored. If the
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* ConnectionAnchor moves, the Connection should move with it.
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*/
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public interface ConnectionAnchor {
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/**
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* Adds a listener interested in the movement of this ConnectionAnchor.
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*
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* @param listener
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* The AnchorListener to be added
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*/
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void addAnchorListener(AnchorListener listener);
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/**
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* Returns the location where the Connection should be anchored in absolute
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* coordinates. The anchor may use the given reference Point to calculate
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* this location.
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*
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* @param reference
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* The reference Point in absolute coordinates
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* @return The anchor's location
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*/
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Point getLocation(Point reference);
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/**
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* Returns the IFigure that contains this ConnectionAnchor. Moving this
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* figure will cause the anchor to move with it.
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*
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* @return The IFigure that contains this ConnectionAnchor
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*/
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IFigure getOwner();
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/**
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* Returns the reference point for this anchor in absolute coordinates. This
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* might be used by another anchor to determine its own location (i.e.
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* {@link ChopboxAnchor}).
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*
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* @return The reference Point
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*/
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Point getReferencePoint();
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/**
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* Removes the listener.
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*
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* @param listener
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* The AnchorListener to be removed
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*/
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void removeAnchorListener(AnchorListener listener);
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}
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