1 /*
2 * Copyright (c) 2003, the JUNG Project and the Regents of the University of
3 * California All rights reserved.
4 *
5 * This software is open-source under the BSD license; see either "license.txt"
6 * or http://jung.sourceforge.net/license.txt for a description.
7 *
8 */
9 package edu.uci.ics.jung.visualization.control;
10
11 import java.awt.geom.Point2D;
12
13 import edu.uci.ics.jung.visualization.VisualizationServer;
14
15 public interface ScalingControl {
16
17 /**
18 * zoom the display in or out
19 * @param vv the VisualizationViewer
20 * @param amount how much to adjust scale by
21 * @param at where to adjust scale from
22 */
23 void scale(VisualizationServer<?,?> vv, float amount, Point2D at);
24
25 }