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.event.MouseEvent; | |
15 | import java.awt.event.MouseWheelEvent; | |
16 | import java.awt.event.MouseWheelListener; | |
17 | ||
18 | import edu.uci.ics.jung.visualization.VisualizationViewer; | |
19 | import edu.uci.ics.jung.visualization.transform.LensTransformer; | |
20 | import edu.uci.ics.jung.visualization.transform.MutableTransformer; | |
21 | ||
22 | /** | |
23 | * HyperbolicMagnificationGraphMousePlugin changes the magnification | |
24 | * within the Hyperbolic projection of the HyperbolicTransformer. | |
25 | * | |
26 | * @author Tom Nelson | |
27 | */ | |
28 | public class LensMagnificationGraphMousePlugin extends AbstractGraphMousePlugin | |
29 | implements MouseWheelListener { | |
30 | ||
31 | 0 | protected float floor = .5f; |
32 | ||
33 | 0 | protected float ceiling = .9f; |
34 | ||
35 | 0 | protected float delta = .02f; |
36 | ||
37 | /** | |
38 | * create an instance with default zoom in/out values | |
39 | */ | |
40 | public LensMagnificationGraphMousePlugin() { | |
41 | 0 | this(MouseEvent.CTRL_MASK); |
42 | 0 | } |
43 | ||
44 | /** | |
45 | * create an instance with passed modifiers | |
46 | * @param modifiers | |
47 | */ | |
48 | public LensMagnificationGraphMousePlugin(float floor, float ceiling, float delta) { | |
49 | 0 | this(MouseEvent.CTRL_MASK, floor, ceiling, delta); |
50 | 0 | } |
51 | ||
52 | public LensMagnificationGraphMousePlugin(int modifiers) { | |
53 | 0 | this(modifiers, .5f, .9f, .02f); |
54 | 0 | } |
55 | public LensMagnificationGraphMousePlugin(int modifiers, float floor, float ceiling, float delta) { | |
56 | 0 | super(modifiers); |
57 | 0 | this.floor = floor; |
58 | 0 | this.ceiling = ceiling; |
59 | 0 | this.delta = delta; |
60 | 0 | } |
61 | /** | |
62 | * override to check equality with a mask | |
63 | */ | |
64 | public boolean checkModifiers(MouseEvent e) { | |
65 | 0 | return (e.getModifiers() & modifiers) != 0; |
66 | } | |
67 | ||
68 | private void changeMagnification(MutableTransformer transformer, float delta) { | |
69 | 0 | if(transformer instanceof LensTransformer) { |
70 | 0 | LensTransformer ht = (LensTransformer)transformer; |
71 | 0 | float magnification = ht.getMagnification() + delta; |
72 | 0 | magnification = Math.max(floor, magnification); |
73 | 0 | magnification = Math.min(magnification, ceiling); |
74 | 0 | ht.setMagnification(magnification); |
75 | } | |
76 | 0 | } |
77 | /** | |
78 | * zoom the display in or out, depending on the direction of the | |
79 | * mouse wheel motion. | |
80 | */ | |
81 | public void mouseWheelMoved(MouseWheelEvent e) { | |
82 | 0 | boolean accepted = checkModifiers(e); |
83 | 0 | float delta = this.delta; |
84 | 0 | if(accepted == true) { |
85 | 0 | VisualizationViewer vv = (VisualizationViewer)e.getSource(); |
86 | 0 | MutableTransformer modelTransformer = vv.getLayoutTransformer(); |
87 | 0 | MutableTransformer viewTransformer = vv.getViewTransformer(); |
88 | 0 | int amount = e.getWheelRotation(); |
89 | 0 | if(amount < 0) { |
90 | 0 | delta = -delta; |
91 | } | |
92 | 0 | changeMagnification(modelTransformer, delta); |
93 | 0 | changeMagnification(viewTransformer, delta); |
94 | 0 | vv.repaint(); |
95 | 0 | e.consume(); |
96 | } | |
97 | 0 | } |
98 | } |
this report was generated by version 1.0.5 of jcoverage. |
copyright © 2003, jcoverage ltd. all rights reserved. |