# Coverage details for edu.uci.ics.jung.visualization.control.ViewScalingControl

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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