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

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.Cursor;`
15 |  | `import java.awt.event.MouseEvent;`
16 |  | `import java.awt.event.MouseListener;`
17 |  | `import java.awt.event.MouseMotionListener;`
18 |  | `import java.awt.geom.Point2D;`
19 |  | ``
20 |  | `import edu.uci.ics.jung.visualization.VisualizationViewer;`
21 |  | `import edu.uci.ics.jung.visualization.transform.MutableTransformer;`
22 |  | ``
23 |  | `/**`
24 |  | `* ViewTranslatingGraphMousePlugin uses a MouseButtonOne press and`
25 |  | `* drag gesture to translate the graph display in the x and y`
26 |  | `* direction by changing the AffineTransform applied to the Graphics2D.`
27 |  | `* The default MouseButtonOne modifier can be overridden`
28 |  | `* to cause a different mouse gesture to translate the display.`
29 |  | `*`
30 |  | `*`
31 |  | `* @author Tom Nelson`
32 |  | `*/`
33 |  | `public class ViewTranslatingGraphMousePlugin extends AbstractGraphMousePlugin`
34 |  | `implements MouseListener, MouseMotionListener {`
35 |  | ``
36 |  | `/**`
37 |  | `*/`
38 |  | `public ViewTranslatingGraphMousePlugin() {`
39 | 0 | `this(MouseEvent.BUTTON1_MASK);`
40 | 0 | `}`
41 |  | ``
42 |  | `/**`
43 |  | `* create an instance with passed modifer value`
44 |  | `* @param modifiers the mouse event modifier to activate this function`
45 |  | `*/`
46 |  | `public ViewTranslatingGraphMousePlugin(int modifiers) {`
47 | 0 | `super(modifiers);`
48 | 0 | `this.cursor = Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR);`
49 | 0 | `}`
50 |  | ``
51 |  | `/**`
52 |  | `* Check the event modifiers. Set the 'down' point for later`
53 |  | `* use. If this event satisfies the modifiers, change the cursor`
54 |  | `* to the system 'move cursor'`
55 |  | `* @param e the event`
56 |  | `*/`
57 |  | `public void mousePressed(MouseEvent e) {`
58 | 0 | `VisualizationViewer vv = (VisualizationViewer)e.getSource();`
59 | 0 | `boolean accepted = checkModifiers(e);`
60 | 0 | `down = e.getPoint();`
61 | 0 | `if(accepted) {`
62 | 0 | `vv.setCursor(cursor);`
63 |  | `}`
64 | 0 | `}`
65 |  | ``
66 |  | `/**`
67 |  | `* unset the 'down' point and change the cursoe back to the system`
68 |  | `* default cursor`
69 |  | `*/`
70 |  | `public void mouseReleased(MouseEvent e) {`
71 | 0 | `VisualizationViewer vv = (VisualizationViewer)e.getSource();`
72 | 0 | `down = null;`
73 | 0 | `vv.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR));`
74 | 0 | `}`
75 |  | ``
76 |  | `/**`
77 |  | `* chack the modifiers. If accepted, translate the graph according`
78 |  | `* to the dragging of the mouse pointer`
79 |  | `* @param e the event`
80 |  | `*/`
81 |  | `public void mouseDragged(MouseEvent e) {`
82 | 0 | `VisualizationViewer vv = (VisualizationViewer)e.getSource();`
83 | 0 | `boolean accepted = checkModifiers(e);`
84 | 0 | `if(accepted) {`
85 | 0 | `MutableTransformer viewTransformer = vv.getViewTransformer();`
86 | 0 | `vv.setCursor(cursor);`
87 |  | `try {`
88 | 0 | `Point2D q = viewTransformer.inverseTransform(down);`
89 | 0 | `Point2D p = viewTransformer.inverseTransform(e.getPoint());`
90 | 0 | `float dx = (float) (p.getX()-q.getX());`
91 | 0 | `float dy = (float) (p.getY()-q.getY());`
92 |  | ``
93 | 0 | `viewTransformer.translate(dx, dy);`
94 | 0 | `down.x = e.getX();`
95 | 0 | `down.y = e.getY();`
96 | 0 | `} catch(RuntimeException ex) {`
97 | 0 | `System.err.println("down = "+down+", e = "+e);`
98 | 0 | `throw ex;`
99 | 0 | `}`
100 |  | ``
101 | 0 | `e.consume();`
102 |  | `}`
103 | 0 | `}`
104 |  | ``
105 |  | `public void mouseClicked(MouseEvent e) {`
106 |  | `// TODO Auto-generated method stub`
107 |  | ``
108 | 0 | `}`
109 |  | ``
110 |  | `public void mouseEntered(MouseEvent e) {`
111 |  | `// TODO Auto-generated method stub`
112 |  | ``
113 | 0 | `}`
114 |  | ``
115 |  | `public void mouseExited(MouseEvent e) {`
116 |  | `// TODO Auto-generated method stub`
117 |  | ``
118 | 0 | `}`
119 |  | ``
120 |  | `public void mouseMoved(MouseEvent e) {`
121 |  | `// TODO Auto-generated method stub`
122 |  | ``
123 | 0 | `}`
124 |  | `}`

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