source: josm/trunk/src/org/openstreetmap/josm/gui/MapMover.java@ 1169

Last change on this file since 1169 was 1169, checked in by stoecker, 15 years ago

removed usage of tab stops
  • Property svn:eol-style set to native
File size: 8.3 KB
Line 
1// License: GPL. Copyright 2007 by Immanuel Scholz and others
2package org.openstreetmap.josm.gui;
3
4import java.awt.Cursor;
5import java.awt.Point;
6import java.awt.event.ActionEvent;
7import java.awt.event.KeyEvent;
8import java.awt.event.MouseAdapter;
9import java.awt.event.MouseEvent;
10import java.awt.event.MouseMotionListener;
11import java.awt.event.MouseWheelEvent;
12import java.awt.event.MouseWheelListener;
13
14import javax.swing.AbstractAction;
15import javax.swing.JComponent;
16import javax.swing.JPanel;
17import org.openstreetmap.josm.tools.Shortcut;
18import static org.openstreetmap.josm.tools.I18n.tr;
19
20import org.openstreetmap.josm.data.coor.EastNorth;
21
22/**
23 * Enables moving of the map by holding down the right mouse button and drag
24 * the mouse. Also, enables zooming by the mouse wheel.
25 *
26 * @author imi
27 */
28public class MapMover extends MouseAdapter implements MouseMotionListener, MouseWheelListener {
29
30 private final class ZoomerAction extends AbstractAction {
31 private final String action;
32 public ZoomerAction(String action) {
33 this.action = action;
34 }
35 public void actionPerformed(ActionEvent e) {
36 if (action.equals(".") || action.equals(",")) {
37 Point mouse = nc.getMousePosition();
38 if (mouse == null)
39 mouse = new Point((int)nc.getBounds().getCenterX(), (int)nc.getBounds().getCenterY());
40 MouseWheelEvent we = new MouseWheelEvent(nc, e.getID(), e.getWhen(), e.getModifiers(), mouse.x, mouse.y, 0, false, MouseWheelEvent.WHEEL_UNIT_SCROLL, 1, action.equals(",") ? -1 : 1);
41 mouseWheelMoved(we);
42 } else {
43 EastNorth center = nc.getCenter();
44 EastNorth newcenter = nc.getEastNorth(nc.getWidth()/2+nc.getWidth()/5, nc.getHeight()/2+nc.getHeight()/5);
45 if (action.equals("left"))
46 nc.zoomTo(new EastNorth(2*center.east()-newcenter.east(), center.north()), nc.getScale());
47 else if (action.equals("right"))
48 nc.zoomTo(new EastNorth(newcenter.east(), center.north()), nc.getScale());
49 else if (action.equals("up"))
50 nc.zoomTo(new EastNorth(center.east(), 2*center.north()-newcenter.north()), nc.getScale());
51 else if (action.equals("down"))
52 nc.zoomTo(new EastNorth(center.east(), newcenter.north()), nc.getScale());
53 }
54 }
55 }
56
57 /**
58 * The point in the map that was the under the mouse point
59 * when moving around started.
60 */
61 private EastNorth mousePosMove;
62 /**
63 * The map to move around.
64 */
65 private final NavigatableComponent nc;
66 /**
67 * The old cursor when we changed it to movement cursor.
68 */
69 private Cursor oldCursor;
70
71 private boolean movementInPlace = false;
72
73 /**
74 * Create a new MapMover
75 */
76 public MapMover(NavigatableComponent navComp, JPanel contentPane) {
77 this.nc = navComp;
78 nc.addMouseListener(this);
79 nc.addMouseMotionListener(this);
80 nc.addMouseWheelListener(this);
81
82 if (contentPane != null) {
83 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
84 Shortcut.registerShortcut("system:movefocusright", tr("Map: {0}", tr("Move right")), KeyEvent.VK_RIGHT, Shortcut.GROUP_HOTKEY).getKeyStroke(),
85 "MapMover.Zoomer.right");
86 contentPane.getActionMap().put("MapMover.Zoomer.right", new ZoomerAction("right"));
87
88 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
89 Shortcut.registerShortcut("system:movefocusleft", tr("Map: {0}", tr("Move left")), KeyEvent.VK_LEFT, Shortcut.GROUP_HOTKEY).getKeyStroke(),
90 "MapMover.Zoomer.left");
91 contentPane.getActionMap().put("MapMover.Zoomer.left", new ZoomerAction("left"));
92
93 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
94 Shortcut.registerShortcut("system:movefocusup", tr("Map: {0}", tr("Move up")), KeyEvent.VK_UP, Shortcut.GROUP_HOTKEY).getKeyStroke(),
95 "MapMover.Zoomer.up");
96 contentPane.getActionMap().put("MapMover.Zoomer.up", new ZoomerAction("up"));
97
98 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
99 Shortcut.registerShortcut("system:movefocusdown", tr("Map: {0}", tr("Move down")), KeyEvent.VK_DOWN, Shortcut.GROUP_HOTKEY).getKeyStroke(),
100 "MapMover.Zoomer.down");
101 contentPane.getActionMap().put("MapMover.Zoomer.down", new ZoomerAction("down"));
102
103 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
104 Shortcut.registerShortcut("view:zoominalternate", tr("Map: {0}", tr("Zoom in")), KeyEvent.VK_COMMA, Shortcut.GROUP_HOTKEY).getKeyStroke(),
105 "MapMover.Zoomer.in");
106 contentPane.getActionMap().put("MapMover.Zoomer.in", new ZoomerAction(","));
107
108 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
109 Shortcut.registerShortcut("view:zoomoutalternate", tr("Map: {0}", tr("Zoom out")), KeyEvent.VK_PERIOD, Shortcut.GROUP_HOTKEY).getKeyStroke(),
110 "MapMover.Zoomer.out");
111 contentPane.getActionMap().put("MapMover.Zoomer.out", new ZoomerAction("."));
112 }
113 }
114
115 /**
116 * If the right (and only the right) mouse button is pressed, move the map
117 */
118 public void mouseDragged(MouseEvent e) {
119 int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK;
120 if ((e.getModifiersEx() & (MouseEvent.BUTTON3_DOWN_MASK | offMask)) == MouseEvent.BUTTON3_DOWN_MASK) {
121 if (mousePosMove == null)
122 startMovement(e);
123 EastNorth center = nc.getCenter();
124 EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY());
125 EastNorth p = new EastNorth(
126 mousePosMove.east() + center.east() - mouseCenter.east(),
127 mousePosMove.north() + center.north() - mouseCenter.north());
128 nc.zoomTo(p, nc.getScale());
129 } else
130 endMovement();
131 }
132
133 /**
134 * Start the movement, if it was the 3rd button (right button).
135 */
136 @Override public void mousePressed(MouseEvent e) {
137 int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK;
138 if (e.getButton() == MouseEvent.BUTTON3 && (e.getModifiersEx() & offMask) == 0)
139 startMovement(e);
140 }
141
142 /**
143 * Change the cursor back to it's pre-move cursor.
144 */
145 @Override public void mouseReleased(MouseEvent e) {
146 if (e.getButton() == MouseEvent.BUTTON3)
147 endMovement();
148 }
149
150 /**
151 * Start movement by setting a new cursor and remember the current mouse
152 * position.
153 * @param e The mouse event that leat to the movement from.
154 */
155 private void startMovement(MouseEvent e) {
156 if (movementInPlace)
157 return;
158 movementInPlace = true;
159 mousePosMove = nc.getEastNorth(e.getX(), e.getY());
160 oldCursor = nc.getCursor();
161 nc.setCursor(Cursor.getPredefinedCursor(Cursor.MOVE_CURSOR));
162 }
163
164 /**
165 * End the movement. Setting back the cursor and clear the movement variables
166 */
167 private void endMovement() {
168 if (!movementInPlace)
169 return;
170 movementInPlace = false;
171 if (oldCursor != null)
172 nc.setCursor(oldCursor);
173 else
174 nc.setCursor(Cursor.getDefaultCursor());
175 mousePosMove = null;
176 oldCursor = null;
177 }
178
179 /**
180 * Zoom the map by 1/5th of current zoom per wheel-delta.
181 * @param e The wheel event.
182 */
183 public void mouseWheelMoved(MouseWheelEvent e) {
184 int w = nc.getWidth();
185 int h = nc.getHeight();
186
187 double zoom = Math.max(0.1, 1 + e.getWheelRotation()/5.0);
188 double zoomfactor = (zoom-1)/2+1;
189
190 double newHalfWidth = w*zoomfactor - w/2;
191 double newHalfHeight = h*zoomfactor - h/2;
192 double centerx = e.getX() - (e.getX()-w/2)*newHalfWidth*2/w;
193 double centery = e.getY() - (e.getY()-h/2)*newHalfHeight*2/h;
194 EastNorth newCenter = nc.getEastNorth((int)centerx, (int)centery);
195
196 nc.zoomTo(newCenter, nc.getScale()*zoom);
197 }
198
199 /**
200 * Does nothing. Only to satisfy MouseMotionListener
201 */
202 public void mouseMoved(MouseEvent e) {}
203}
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