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Core visualization support for the JUNG project

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/*
 * Copyright (c) 2003, The JUNG Authors
 * All rights reserved.
 * 
 * This software is open-source under the BSD license; see either "license.txt"
 * or https://github.com/jrtom/jung/blob/master/LICENSE for a description.
 * 
 */
package edu.uci.ics.jung.visualization.control;

import java.awt.geom.Point2D;

import edu.uci.ics.jung.visualization.VisualizationServer;

public interface ScalingControl {

    /**
     * zoom the display in or out
     * @param vv the VisualizationViewer
     * @param amount how much to adjust scale by
     * @param at where to adjust scale from
     */
    void scale(VisualizationServer vv, float amount, Point2D at);

}