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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.InputEvent; | |
16 | import java.awt.event.MouseEvent; | |
17 | import java.awt.event.MouseListener; | |
18 | import java.awt.event.MouseMotionListener; | |
19 | import java.awt.geom.Point2D; | |
20 | ||
21 | import javax.swing.JComponent; | |
22 | ||
23 | import edu.uci.ics.jung.graph.Vertex; | |
24 | import edu.uci.ics.jung.visualization.Layout; | |
25 | import edu.uci.ics.jung.visualization.PickSupport; | |
26 | import edu.uci.ics.jung.visualization.PickedState; | |
27 | import edu.uci.ics.jung.visualization.VisualizationViewer; | |
28 | ||
29 | /** | |
30 | * AnimatedPickingGraphMousePlugin supports the picking of one Graph | |
31 | * Vertex. When the mouse is released, the graph is translated so that | |
32 | * the picked Vertex is moved to the center of the view. This translateion | |
33 | * is conducted in an animation Thread so that the graph slides to its | |
34 | * new position | |
35 | * | |
36 | * @author Tom Nelson | |
37 | */ | |
38 | public class AnimatedPickingGraphMousePlugin extends AbstractGraphMousePlugin | |
39 | implements MouseListener, MouseMotionListener { | |
40 | ||
41 | /** | |
42 | * the picked Vertex | |
43 | */ | |
44 | protected Vertex vertex; | |
45 | ||
46 | /** | |
47 | * create an instance with default modifiers | |
48 | * | |
49 | */ | |
50 | public AnimatedPickingGraphMousePlugin() { | |
51 | 0 | this(InputEvent.BUTTON1_MASK | InputEvent.CTRL_MASK); |
52 | 0 | } |
53 | ||
54 | /** | |
55 | * create an instance, overriding the default modifiers | |
56 | * @param selectionModifiers | |
57 | */ | |
58 | public AnimatedPickingGraphMousePlugin(int selectionModifiers) { | |
59 | 0 | super(selectionModifiers); |
60 | 0 | this.cursor = Cursor.getPredefinedCursor(Cursor.HAND_CURSOR); |
61 | 0 | } |
62 | ||
63 | /** | |
64 | * If the event occurs on a Vertex, pick that single Vertex | |
65 | * @param e the event | |
66 | */ | |
67 | public void mousePressed(MouseEvent e) { | |
68 | 0 | if (e.getModifiers() == modifiers) { |
69 | 0 | VisualizationViewer vv = (VisualizationViewer) e.getSource(); |
70 | 0 | PickSupport pickSupport = vv.getPickSupport(); |
71 | 0 | PickedState pickedState = vv.getPickedState(); |
72 | 0 | if (pickSupport != null && pickedState != null) { |
73 | // p is the screen point for the mouse event | |
74 | 0 | Point2D p = e.getPoint(); |
75 | // take away the view transform | |
76 | 0 | Point2D ip = vv.inverseViewTransform(p); |
77 | ||
78 | 0 | vertex = pickSupport.getVertex(ip.getX(), ip.getY()); |
79 | 0 | if (vertex != null) { |
80 | 0 | if (pickedState.isPicked(vertex) == false) { |
81 | 0 | pickedState.clearPickedVertices(); |
82 | 0 | pickedState.pick(vertex, true); |
83 | } | |
84 | } | |
85 | } | |
86 | 0 | e.consume(); |
87 | } | |
88 | 0 | } |
89 | ||
90 | ||
91 | /** | |
92 | * If a Vertex was picked in the mousePressed event, start a Thread | |
93 | * to animate the translation of the graph so that the picked Vertex | |
94 | * moves to the center of the view | |
95 | * | |
96 | * @param e the event | |
97 | */ | |
98 | public void mouseReleased(MouseEvent e) { | |
99 | 0 | if (e.getModifiers() == modifiers) { |
100 | 0 | final VisualizationViewer vv = (VisualizationViewer) e.getSource(); |
101 | 0 | if (vertex != null) { |
102 | 0 | Layout layout = vv.getGraphLayout(); |
103 | 0 | Point2D q = layout.getLocation(vertex); |
104 | 0 | Point2D lvc = vv.inverseTransform(vv.getCenter()); |
105 | 0 | final double dx = (lvc.getX() - q.getX()) / 10; |
106 | 0 | final double dy = (lvc.getY() - q.getY()) / 10; |
107 | ||
108 | 0 | Runnable animator = new Runnable() { |
109 | ||
110 | public void run() { | |
111 | for (int i = 0; i < 10; i++) { | |
112 | vv.getLayoutTransformer().translate(dx, dy); | |
113 | try { | |
114 | Thread.sleep(100); | |
115 | } catch (InterruptedException ex) { | |
116 | } | |
117 | } | |
118 | } | |
119 | }; | |
120 | 0 | Thread thread = new Thread(animator); |
121 | 0 | thread.start(); |
122 | } | |
123 | } | |
124 | 0 | } |
125 | ||
126 | public void mouseClicked(MouseEvent e) { | |
127 | 0 | } |
128 | ||
129 | /** | |
130 | * show a special cursor while the mouse is inside the window | |
131 | */ | |
132 | public void mouseEntered(MouseEvent e) { | |
133 | 0 | JComponent c = (JComponent)e.getSource(); |
134 | 0 | c.setCursor(cursor); |
135 | 0 | } |
136 | ||
137 | /** | |
138 | * revert to the default cursor when the mouse leaves this window | |
139 | */ | |
140 | public void mouseExited(MouseEvent e) { | |
141 | 0 | JComponent c = (JComponent)e.getSource(); |
142 | 0 | c.setCursor(Cursor.getPredefinedCursor(Cursor.DEFAULT_CURSOR)); |
143 | 0 | } |
144 | ||
145 | public void mouseMoved(MouseEvent e) { | |
146 | 0 | } |
147 | ||
148 | public void mouseDragged(MouseEvent arg0) { | |
149 | 0 | } |
150 | } |
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