| Line | Hits | Source |
|---|---|---|
| 1 | /* | |
| 2 | * Copyright (c) 2005, the JUNG Project and the Regents of the University | |
| 3 | * of California | |
| 4 | * All rights reserved. | |
| 5 | * | |
| 6 | * This software is open-source under the BSD license; see either | |
| 7 | * "license.txt" or | |
| 8 | * http://jung.sourceforge.net/license.txt for a description. | |
| 9 | * Created on Mar 8, 2005 | |
| 10 | * | |
| 11 | */ | |
| 12 | package edu.uci.ics.jung.visualization.control; | |
| 13 | ||
| 14 | import java.awt.geom.Point2D; | |
| 15 | ||
| 16 | import edu.uci.ics.jung.visualization.VisualizationViewer; | |
| 17 | import edu.uci.ics.jung.visualization.transform.MutableTransformer; | |
| 18 | ||
| 19 | /** | |
| 20 | * ViewScalingGraphMouse applies a scaling transform to the View | |
| 21 | * of the graph. This causes all elements of the graph to grow | |
| 22 | * larger or smaller. ViewScalingGraphMouse, by default, is activated | |
| 23 | * by the MouseWheel when the control key is pressed. The control | |
| 24 | * key modifier can be overridden in the contstructor. | |
| 25 | * | |
| 26 | * @author Tom Nelson | |
| 27 | */ | |
| 28 | 0 | public class ViewScalingControl implements ScalingControl { |
| 29 | ||
| 30 | /** | |
| 31 | * zoom the display in or out, depending on the direction of the | |
| 32 | * mouse wheel motion. | |
| 33 | */ | |
| 34 | public void scale(VisualizationViewer vv, float amount, Point2D from) { | |
| 35 | 0 | MutableTransformer viewTransformer = vv.getViewTransformer(); |
| 36 | 0 | viewTransformer.scale(amount, amount, from); |
| 37 | 0 | vv.repaint(); |
| 38 | 0 | } |
| 39 | } |
|
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