source: josm/trunk/src/org/openstreetmap/josm/gui/MapMover.java@ 6038

Last change on this file since 6038 was 5472, checked in by Don-vip, 12 years ago

see #7980 - fix another two memory leaks
  • Property svn:eol-style set to native
File size: 10.0 KB
Line 
1// License: GPL. Copyright 2007 by Immanuel Scholz and others
2package org.openstreetmap.josm.gui;
3
4import static org.openstreetmap.josm.tools.I18n.tr;
5
6import java.awt.Cursor;
7import java.awt.Point;
8import java.awt.event.ActionEvent;
9import java.awt.event.KeyEvent;
10import java.awt.event.MouseAdapter;
11import java.awt.event.MouseEvent;
12import java.awt.event.MouseMotionListener;
13import java.awt.event.MouseWheelEvent;
14import java.awt.event.MouseWheelListener;
15
16import javax.swing.AbstractAction;
17import javax.swing.ActionMap;
18import javax.swing.InputMap;
19import javax.swing.JComponent;
20import javax.swing.JPanel;
21import javax.swing.KeyStroke;
22
23import org.openstreetmap.josm.Main;
24import org.openstreetmap.josm.data.coor.EastNorth;
25import org.openstreetmap.josm.tools.Destroyable;
26import org.openstreetmap.josm.tools.PlatformHookOsx;
27import org.openstreetmap.josm.tools.Shortcut;
28
29/**
30 * Enables moving of the map by holding down the right mouse button and drag
31 * the mouse. Also, enables zooming by the mouse wheel.
32 *
33 * @author imi
34 */
35public class MapMover extends MouseAdapter implements MouseMotionListener, MouseWheelListener, Destroyable {
36
37 private final class ZoomerAction extends AbstractAction {
38 private final String action;
39 public ZoomerAction(String action) {
40 this.action = action;
41 }
42 public void actionPerformed(ActionEvent e) {
43 if (action.equals(".") || action.equals(",")) {
44 Point mouse = nc.getMousePosition();
45 if (mouse == null)
46 mouse = new Point((int)nc.getBounds().getCenterX(), (int)nc.getBounds().getCenterY());
47 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);
48 mouseWheelMoved(we);
49 } else {
50 EastNorth center = nc.getCenter();
51 EastNorth newcenter = nc.getEastNorth(nc.getWidth()/2+nc.getWidth()/5, nc.getHeight()/2+nc.getHeight()/5);
52 if (action.equals("left"))
53 nc.zoomTo(new EastNorth(2*center.east()-newcenter.east(), center.north()));
54 else if (action.equals("right"))
55 nc.zoomTo(new EastNorth(newcenter.east(), center.north()));
56 else if (action.equals("up"))
57 nc.zoomTo(new EastNorth(center.east(), 2*center.north()-newcenter.north()));
58 else if (action.equals("down"))
59 nc.zoomTo(new EastNorth(center.east(), newcenter.north()));
60 }
61 }
62 }
63
64 /**
65 * The point in the map that was the under the mouse point
66 * when moving around started.
67 */
68 private EastNorth mousePosMove;
69 /**
70 * The map to move around.
71 */
72 private final NavigatableComponent nc;
73 private final JPanel contentPane;
74
75 private boolean movementInPlace = false;
76
77 /**
78 * Create a new MapMover
79 */
80 public MapMover(NavigatableComponent navComp, JPanel contentPane) {
81 this.nc = navComp;
82 this.contentPane = contentPane;
83 nc.addMouseListener(this);
84 nc.addMouseMotionListener(this);
85 nc.addMouseWheelListener(this);
86
87 if (contentPane != null) {
88 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
89 Shortcut.registerShortcut("system:movefocusright", tr("Map: {0}", tr("Move right")), KeyEvent.VK_RIGHT, Shortcut.CTRL).getKeyStroke(),
90 "MapMover.Zoomer.right");
91 contentPane.getActionMap().put("MapMover.Zoomer.right", new ZoomerAction("right"));
92
93 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
94 Shortcut.registerShortcut("system:movefocusleft", tr("Map: {0}", tr("Move left")), KeyEvent.VK_LEFT, Shortcut.CTRL).getKeyStroke(),
95 "MapMover.Zoomer.left");
96 contentPane.getActionMap().put("MapMover.Zoomer.left", new ZoomerAction("left"));
97
98 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
99 Shortcut.registerShortcut("system:movefocusup", tr("Map: {0}", tr("Move up")), KeyEvent.VK_UP, Shortcut.CTRL).getKeyStroke(),
100 "MapMover.Zoomer.up");
101 contentPane.getActionMap().put("MapMover.Zoomer.up", new ZoomerAction("up"));
102
103 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
104 Shortcut.registerShortcut("system:movefocusdown", tr("Map: {0}", tr("Move down")), KeyEvent.VK_DOWN, Shortcut.CTRL).getKeyStroke(),
105 "MapMover.Zoomer.down");
106 contentPane.getActionMap().put("MapMover.Zoomer.down", new ZoomerAction("down"));
107
108 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
109 Shortcut.registerShortcut("view:zoominalternate", tr("Map: {0}", tr("Zoom in")), KeyEvent.VK_COMMA, Shortcut.CTRL).getKeyStroke(),
110 "MapMover.Zoomer.in");
111 contentPane.getActionMap().put("MapMover.Zoomer.in", new ZoomerAction(","));
112
113 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
114 Shortcut.registerShortcut("view:zoomoutalternate", tr("Map: {0}", tr("Zoom out")), KeyEvent.VK_PERIOD, Shortcut.CTRL).getKeyStroke(),
115 "MapMover.Zoomer.out");
116 contentPane.getActionMap().put("MapMover.Zoomer.out", new ZoomerAction("."));
117 }
118 }
119
120 /**
121 * If the right (and only the right) mouse button is pressed, move the map
122 */
123 public void mouseDragged(MouseEvent e) {
124 int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK;
125 if ((e.getModifiersEx() & (MouseEvent.BUTTON3_DOWN_MASK | offMask)) == MouseEvent.BUTTON3_DOWN_MASK) {
126 if (mousePosMove == null)
127 startMovement(e);
128 EastNorth center = nc.getCenter();
129 EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY());
130 nc.zoomTo(new EastNorth(
131 mousePosMove.east() + center.east() - mouseCenter.east(),
132 mousePosMove.north() + center.north() - mouseCenter.north()));
133 } else
134 endMovement();
135 }
136
137 /**
138 * Start the movement, if it was the 3rd button (right button).
139 */
140 @Override public void mousePressed(MouseEvent e) {
141 int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK;
142 int macMouseMask = MouseEvent.CTRL_DOWN_MASK | MouseEvent.BUTTON1_DOWN_MASK;
143 if (e.getButton() == MouseEvent.BUTTON3 && (e.getModifiersEx() & offMask) == 0) {
144 startMovement(e);
145 } else if (isPlatformOsx() && e.getModifiersEx() == macMouseMask) {
146 startMovement(e);
147 }
148 }
149
150 /**
151 * Change the cursor back to it's pre-move cursor.
152 */
153 @Override public void mouseReleased(MouseEvent e) {
154 if (e.getButton() == MouseEvent.BUTTON3) {
155 endMovement();
156 } else if (isPlatformOsx() && e.getButton() == MouseEvent.BUTTON1) {
157 endMovement();
158 }
159 }
160
161 /**
162 * Start movement by setting a new cursor and remember the current mouse
163 * position.
164 * @param e The mouse event that leat to the movement from.
165 */
166 private void startMovement(MouseEvent e) {
167 if (movementInPlace)
168 return;
169 movementInPlace = true;
170 mousePosMove = nc.getEastNorth(e.getX(), e.getY());
171 nc.setNewCursor(Cursor.MOVE_CURSOR, this);
172 }
173
174 /**
175 * End the movement. Setting back the cursor and clear the movement variables
176 */
177 private void endMovement() {
178 if (!movementInPlace)
179 return;
180 movementInPlace = false;
181 nc.resetCursor(this);
182 mousePosMove = null;
183 }
184
185 /**
186 * Zoom the map by 1/5th of current zoom per wheel-delta.
187 * @param e The wheel event.
188 */
189 public void mouseWheelMoved(MouseWheelEvent e) {
190 nc.zoomToFactor(e.getX(), e.getY(), Math.pow(Math.sqrt(2), e.getWheelRotation()));
191 }
192
193 /**
194 * Emulates dragging on Mac OSX
195 */
196 public void mouseMoved(MouseEvent e) {
197 if (!movementInPlace)
198 return;
199 // Mac OSX simulates with ctrl + mouse 1 the second mouse button hence no dragging events get fired.
200 // Is only the selected mouse button pressed?
201 if (isPlatformOsx()) {
202 if (e.getModifiersEx() == MouseEvent.CTRL_DOWN_MASK) {
203 if (mousePosMove == null) {
204 startMovement(e);
205 }
206 EastNorth center = nc.getCenter();
207 EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY());
208 nc.zoomTo(new EastNorth(mousePosMove.east() + center.east() - mouseCenter.east(), mousePosMove.north()
209 + center.north() - mouseCenter.north()));
210 } else {
211 endMovement();
212 }
213 }
214 }
215
216 /**
217 * Replies true if we are currently running on OSX
218 *
219 * @return true if we are currently running on OSX
220 */
221 public static boolean isPlatformOsx() {
222 return Main.platform != null && Main.platform instanceof PlatformHookOsx;
223 }
224
225 @Override
226 public void destroy() {
227 if (this.contentPane != null) {
228 InputMap inputMap = contentPane.getInputMap();
229 KeyStroke[] inputKeys = inputMap.keys();
230 if (inputKeys != null) {
231 for (KeyStroke key : inputKeys) {
232 Object binding = inputMap.get(key);
233 if (binding instanceof String && ((String)binding).startsWith("MapMover.")) {
234 inputMap.remove(key);
235 }
236 }
237 }
238 ActionMap actionMap = contentPane.getActionMap();
239 Object[] actionsKeys = actionMap.keys();
240 if (actionsKeys != null) {
241 for (Object key : actionsKeys) {
242 if (key instanceof String && ((String)key).startsWith("MapMover.")) {
243 actionMap.remove(key);
244 }
245 }
246 }
247 }
248 }
249}
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