1 | // License: GPL. Copyright 2007 by Christian Gallioz (aka khris78)
|
---|
2 |
|
---|
3 | package org.openstreetmap.josm.gui;
|
---|
4 |
|
---|
5 | import java.awt.BorderLayout;
|
---|
6 | import java.awt.Dimension;
|
---|
7 | import java.awt.Point;
|
---|
8 | import java.awt.Rectangle;
|
---|
9 | import java.awt.event.ActionEvent;
|
---|
10 | import java.awt.event.ActionListener;
|
---|
11 | import java.awt.event.MouseAdapter;
|
---|
12 | import java.awt.event.MouseEvent;
|
---|
13 |
|
---|
14 | import javax.swing.JButton;
|
---|
15 | import javax.swing.JComponent;
|
---|
16 | import javax.swing.JPanel;
|
---|
17 | import javax.swing.JViewport;
|
---|
18 | import javax.swing.Timer;
|
---|
19 |
|
---|
20 | import org.openstreetmap.josm.tools.ImageProvider;
|
---|
21 |
|
---|
22 | /** A viewport with UP and DOWN arrow buttons, so that the user can make the
|
---|
23 | * content scroll.
|
---|
24 | */
|
---|
25 | public class ScrollViewport extends JPanel {
|
---|
26 |
|
---|
27 | private static final int NO_SCROLL = 0;
|
---|
28 |
|
---|
29 | public static final int UP_DIRECTION = 1;
|
---|
30 | public static final int DOWN_DIRECTION = 2;
|
---|
31 | public static final int LEFT_DIRECTION = 4;
|
---|
32 | public static final int RIGHT_DIRECTION = 8;
|
---|
33 | public static final int VERTICAL_DIRECTION = UP_DIRECTION | DOWN_DIRECTION;
|
---|
34 | public static final int HORIZONTAL_DIRECTION = LEFT_DIRECTION | RIGHT_DIRECTION;
|
---|
35 | public static final int ALL_DIRECTION = HORIZONTAL_DIRECTION | VERTICAL_DIRECTION;
|
---|
36 |
|
---|
37 | private class ScrollViewPortMouseListener extends MouseAdapter {
|
---|
38 | private int direction;
|
---|
39 |
|
---|
40 | public ScrollViewPortMouseListener(int direction) {
|
---|
41 | this.direction = direction;
|
---|
42 | }
|
---|
43 |
|
---|
44 | @Override public void mouseExited(MouseEvent arg0) {
|
---|
45 | ScrollViewport.this.scrollDirection = NO_SCROLL;
|
---|
46 | timer.stop();
|
---|
47 | }
|
---|
48 |
|
---|
49 | @Override public void mouseReleased(MouseEvent arg0) {
|
---|
50 | ScrollViewport.this.scrollDirection = NO_SCROLL;
|
---|
51 | timer.stop();
|
---|
52 | }
|
---|
53 |
|
---|
54 | @Override public void mousePressed(MouseEvent arg0) {
|
---|
55 | ScrollViewport.this.scrollDirection = direction;
|
---|
56 | scroll();
|
---|
57 | timer.restart();
|
---|
58 | }
|
---|
59 |
|
---|
60 | }
|
---|
61 |
|
---|
62 | private JViewport vp = new JViewport();
|
---|
63 | private JComponent component = null;
|
---|
64 |
|
---|
65 | private Timer timer = new Timer(200, new ActionListener() {
|
---|
66 | public void actionPerformed(ActionEvent arg0) {
|
---|
67 | ScrollViewport.this.scroll();
|
---|
68 | }
|
---|
69 | });
|
---|
70 |
|
---|
71 | private int scrollDirection = NO_SCROLL;
|
---|
72 |
|
---|
73 | public ScrollViewport(JComponent c, int direction) {
|
---|
74 | this(direction);
|
---|
75 | add(c);
|
---|
76 | }
|
---|
77 |
|
---|
78 | public ScrollViewport(int direction) {
|
---|
79 | setLayout(new BorderLayout());
|
---|
80 |
|
---|
81 | JButton button;
|
---|
82 |
|
---|
83 | // UP
|
---|
84 | if ((direction & UP_DIRECTION) > 0) {
|
---|
85 | button = new JButton();
|
---|
86 | button.addMouseListener(new ScrollViewPortMouseListener(UP_DIRECTION));
|
---|
87 | button.setPreferredSize(new Dimension(10,10));
|
---|
88 | button.setIcon(ImageProvider.get("svpUp"));
|
---|
89 | add(button, BorderLayout.NORTH);
|
---|
90 | }
|
---|
91 |
|
---|
92 | // DOWN
|
---|
93 | if ((direction & DOWN_DIRECTION) > 0) {
|
---|
94 | button = new JButton();
|
---|
95 | button.addMouseListener(new ScrollViewPortMouseListener(DOWN_DIRECTION));
|
---|
96 | button.setPreferredSize(new Dimension(10,10));
|
---|
97 | button.setIcon(ImageProvider.get("svpDown"));
|
---|
98 | add(button, BorderLayout.SOUTH);
|
---|
99 | }
|
---|
100 |
|
---|
101 | // LEFT
|
---|
102 | if ((direction & LEFT_DIRECTION) > 0) {
|
---|
103 | button = new JButton();
|
---|
104 | button.addMouseListener(new ScrollViewPortMouseListener(LEFT_DIRECTION));
|
---|
105 | button.setPreferredSize(new Dimension(10,10));
|
---|
106 | button.setIcon(ImageProvider.get("svpLeft"));
|
---|
107 | add(button, BorderLayout.WEST);
|
---|
108 | }
|
---|
109 |
|
---|
110 | // RIGHT
|
---|
111 | if ((direction & RIGHT_DIRECTION) > 0) {
|
---|
112 | button = new JButton();
|
---|
113 | button.addMouseListener(new ScrollViewPortMouseListener(RIGHT_DIRECTION));
|
---|
114 | button.setPreferredSize(new Dimension(10,10));
|
---|
115 | button.setIcon(ImageProvider.get("svpRight"));
|
---|
116 | add(button, BorderLayout.EAST);
|
---|
117 | }
|
---|
118 |
|
---|
119 | add(vp, BorderLayout.CENTER);
|
---|
120 |
|
---|
121 | timer.setRepeats(true);
|
---|
122 | timer.setInitialDelay(400);
|
---|
123 | }
|
---|
124 |
|
---|
125 | public synchronized void scroll() {
|
---|
126 | int direction = scrollDirection;
|
---|
127 |
|
---|
128 | if (component == null || direction == NO_SCROLL) {
|
---|
129 | return;
|
---|
130 | }
|
---|
131 |
|
---|
132 | Dimension compSize = component.getSize();
|
---|
133 | Rectangle viewRect = vp.getViewRect();
|
---|
134 |
|
---|
135 | int delta;
|
---|
136 | int newY = 0;
|
---|
137 | int newX = 0;
|
---|
138 |
|
---|
139 | if (direction < LEFT_DIRECTION) {
|
---|
140 | newX = viewRect.x;
|
---|
141 | delta = viewRect.height * 4 / 5;
|
---|
142 | } else {
|
---|
143 | newY = viewRect.y;
|
---|
144 | delta = viewRect.width * 4 / 5;
|
---|
145 | }
|
---|
146 |
|
---|
147 | switch (direction) {
|
---|
148 | case UP_DIRECTION :
|
---|
149 | newY = viewRect.y - delta;
|
---|
150 | if (newY < 0) {
|
---|
151 | newY = 0;
|
---|
152 | }
|
---|
153 | break;
|
---|
154 | case DOWN_DIRECTION :
|
---|
155 | newY = viewRect.y + delta;
|
---|
156 | if (newY > compSize.height - viewRect.height) {
|
---|
157 | newY = compSize.height - viewRect.height;
|
---|
158 | }
|
---|
159 | break;
|
---|
160 | case LEFT_DIRECTION :
|
---|
161 | newX = viewRect.x - delta;
|
---|
162 | if (newX < 0) {
|
---|
163 | newX = 0;
|
---|
164 | }
|
---|
165 | break;
|
---|
166 | case RIGHT_DIRECTION :
|
---|
167 | newX = viewRect.x + delta;
|
---|
168 | if (newX > compSize.width - viewRect.width) {
|
---|
169 | newX = compSize.width - viewRect.width;
|
---|
170 | }
|
---|
171 | break;
|
---|
172 | default :
|
---|
173 | throw new IllegalStateException("Unknown direction : [0]" + direction);
|
---|
174 | }
|
---|
175 |
|
---|
176 | vp.setViewPosition(new Point(newX, newY));
|
---|
177 | }
|
---|
178 |
|
---|
179 | public Rectangle getViewRect() {
|
---|
180 | return vp.getViewRect();
|
---|
181 | }
|
---|
182 |
|
---|
183 | public Dimension getViewSize() {
|
---|
184 | return vp.getViewSize();
|
---|
185 | }
|
---|
186 |
|
---|
187 | public Point getViewPosition() {
|
---|
188 | return vp.getViewPosition();
|
---|
189 | }
|
---|
190 |
|
---|
191 | public void add(JComponent c) {
|
---|
192 | vp.removeAll();
|
---|
193 | this.component = c;
|
---|
194 | vp.add(c);
|
---|
195 | }
|
---|
196 | }
|
---|