source: josm/trunk/src/org/openstreetmap/josm/gui/MapMover.java@ 8509

Last change on this file since 8509 was 8509, checked in by Don-vip, 9 years ago

fix many checkstyle violations
  • Property svn:eol-style set to native
File size: 10.6 KB
Line 
1// License: GPL. For details, see LICENSE file.
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.actions.mapmode.SelectAction;
25import org.openstreetmap.josm.data.coor.EastNorth;
26import org.openstreetmap.josm.tools.Destroyable;
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 @Override
43 public void actionPerformed(ActionEvent e) {
44 if (".".equals(action) || ",".equals(action)) {
45 Point mouse = nc.getMousePosition();
46 if (mouse == null)
47 mouse = new Point((int)nc.getBounds().getCenterX(), (int)nc.getBounds().getCenterY());
48 MouseWheelEvent we = new MouseWheelEvent(nc, e.getID(), e.getWhen(), e.getModifiers(), mouse.x, mouse.y, 0, false,
49 MouseWheelEvent.WHEEL_UNIT_SCROLL, 1, ",".equals(action) ? -1 : 1);
50 mouseWheelMoved(we);
51 } else {
52 EastNorth center = nc.getCenter();
53 EastNorth newcenter = nc.getEastNorth(nc.getWidth()/2+nc.getWidth()/5, nc.getHeight()/2+nc.getHeight()/5);
54 switch(action) {
55 case "left":
56 nc.zoomTo(new EastNorth(2*center.east()-newcenter.east(), center.north()));
57 break;
58 case "right":
59 nc.zoomTo(new EastNorth(newcenter.east(), center.north()));
60 break;
61 case "up":
62 nc.zoomTo(new EastNorth(center.east(), 2*center.north()-newcenter.north()));
63 break;
64 case "down":
65 nc.zoomTo(new EastNorth(center.east(), newcenter.north()));
66 break;
67 }
68 }
69 }
70 }
71
72 /**
73 * The point in the map that was the under the mouse point
74 * when moving around started.
75 */
76 private EastNorth mousePosMove;
77 /**
78 * The map to move around.
79 */
80 private final NavigatableComponent nc;
81 private final JPanel contentPane;
82
83 private boolean movementInPlace = false;
84
85 /**
86 * Constructs a new {@code MapMover}.
87 * @param navComp the navigatable component
88 * @param contentPane the content pane
89 */
90 public MapMover(NavigatableComponent navComp, JPanel contentPane) {
91 this.nc = navComp;
92 this.contentPane = contentPane;
93 nc.addMouseListener(this);
94 nc.addMouseMotionListener(this);
95 nc.addMouseWheelListener(this);
96
97 if (contentPane != null) {
98 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
99 Shortcut.registerShortcut("system:movefocusright", tr("Map: {0}", tr("Move right")), KeyEvent.VK_RIGHT, Shortcut.CTRL).getKeyStroke(),
100 "MapMover.Zoomer.right");
101 contentPane.getActionMap().put("MapMover.Zoomer.right", new ZoomerAction("right"));
102
103 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
104 Shortcut.registerShortcut("system:movefocusleft", tr("Map: {0}", tr("Move left")), KeyEvent.VK_LEFT, Shortcut.CTRL).getKeyStroke(),
105 "MapMover.Zoomer.left");
106 contentPane.getActionMap().put("MapMover.Zoomer.left", new ZoomerAction("left"));
107
108 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
109 Shortcut.registerShortcut("system:movefocusup", tr("Map: {0}", tr("Move up")), KeyEvent.VK_UP, Shortcut.CTRL).getKeyStroke(),
110 "MapMover.Zoomer.up");
111 contentPane.getActionMap().put("MapMover.Zoomer.up", new ZoomerAction("up"));
112
113 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
114 Shortcut.registerShortcut("system:movefocusdown", tr("Map: {0}", tr("Move down")), KeyEvent.VK_DOWN, Shortcut.CTRL).getKeyStroke(),
115 "MapMover.Zoomer.down");
116 contentPane.getActionMap().put("MapMover.Zoomer.down", new ZoomerAction("down"));
117
118 // see #10592 - Disable these alternate shortcuts on OS X because of conflict with system shortcut
119 if (!Main.isPlatformOsx()) {
120 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
121 Shortcut.registerShortcut("view:zoominalternate",
122 tr("Map: {0}", tr("Zoom in")), KeyEvent.VK_COMMA, Shortcut.CTRL).getKeyStroke(),
123 "MapMover.Zoomer.in");
124 contentPane.getActionMap().put("MapMover.Zoomer.in", new ZoomerAction(","));
125
126 contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
127 Shortcut.registerShortcut("view:zoomoutalternate",
128 tr("Map: {0}", tr("Zoom out")), KeyEvent.VK_PERIOD, Shortcut.CTRL).getKeyStroke(),
129 "MapMover.Zoomer.out");
130 contentPane.getActionMap().put("MapMover.Zoomer.out", new ZoomerAction("."));
131 }
132 }
133 }
134
135 /**
136 * If the right (and only the right) mouse button is pressed, move the map.
137 */
138 @Override
139 public void mouseDragged(MouseEvent e) {
140 int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK;
141 int macMouseMask = MouseEvent.CTRL_DOWN_MASK | MouseEvent.BUTTON1_DOWN_MASK;
142 boolean stdMovement = (e.getModifiersEx() & (MouseEvent.BUTTON3_DOWN_MASK | offMask)) == MouseEvent.BUTTON3_DOWN_MASK;
143 boolean macMovement = Main.isPlatformOsx() && e.getModifiersEx() == macMouseMask;
144 boolean allowedMode = !Main.map.mapModeSelect.equals(Main.map.mapMode)
145 || SelectAction.Mode.SELECT.equals(Main.map.mapModeSelect.getMode());
146 if (stdMovement || (macMovement && allowedMode)) {
147 if (mousePosMove == null)
148 startMovement(e);
149 EastNorth center = nc.getCenter();
150 EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY());
151 nc.zoomTo(new EastNorth(
152 mousePosMove.east() + center.east() - mouseCenter.east(),
153 mousePosMove.north() + center.north() - mouseCenter.north()));
154 } else {
155 endMovement();
156 }
157 }
158
159 /**
160 * Start the movement, if it was the 3rd button (right button).
161 */
162 @Override
163 public void mousePressed(MouseEvent e) {
164 int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK;
165 int macMouseMask = MouseEvent.CTRL_DOWN_MASK | MouseEvent.BUTTON1_DOWN_MASK;
166 if (e.getButton() == MouseEvent.BUTTON3 && (e.getModifiersEx() & offMask) == 0 ||
167 Main.isPlatformOsx() && e.getModifiersEx() == macMouseMask) {
168 startMovement(e);
169 }
170 }
171
172 /**
173 * Change the cursor back to it's pre-move cursor.
174 */
175 @Override
176 public void mouseReleased(MouseEvent e) {
177 if (e.getButton() == MouseEvent.BUTTON3 || Main.isPlatformOsx() && e.getButton() == MouseEvent.BUTTON1) {
178 endMovement();
179 }
180 }
181
182 /**
183 * Start movement by setting a new cursor and remember the current mouse
184 * position.
185 * @param e The mouse event that leat to the movement from.
186 */
187 private void startMovement(MouseEvent e) {
188 if (movementInPlace)
189 return;
190 movementInPlace = true;
191 mousePosMove = nc.getEastNorth(e.getX(), e.getY());
192 nc.setNewCursor(Cursor.MOVE_CURSOR, this);
193 }
194
195 /**
196 * End the movement. Setting back the cursor and clear the movement variables
197 */
198 private void endMovement() {
199 if (!movementInPlace)
200 return;
201 movementInPlace = false;
202 nc.resetCursor(this);
203 mousePosMove = null;
204 }
205
206 /**
207 * Zoom the map by 1/5th of current zoom per wheel-delta.
208 * @param e The wheel event.
209 */
210 @Override
211 public void mouseWheelMoved(MouseWheelEvent e) {
212 nc.zoomToFactor(e.getX(), e.getY(), Math.pow(Math.sqrt(2), e.getWheelRotation()));
213 }
214
215 /**
216 * Emulates dragging on Mac OSX.
217 */
218 @Override
219 public void mouseMoved(MouseEvent e) {
220 if (!movementInPlace)
221 return;
222 // Mac OSX simulates with ctrl + mouse 1 the second mouse button hence no dragging events get fired.
223 // Is only the selected mouse button pressed?
224 if (Main.isPlatformOsx()) {
225 if (e.getModifiersEx() == MouseEvent.CTRL_DOWN_MASK) {
226 if (mousePosMove == null) {
227 startMovement(e);
228 }
229 EastNorth center = nc.getCenter();
230 EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY());
231 nc.zoomTo(new EastNorth(mousePosMove.east() + center.east() - mouseCenter.east(), mousePosMove.north()
232 + center.north() - mouseCenter.north()));
233 } else {
234 endMovement();
235 }
236 }
237 }
238
239 @Override
240 public void destroy() {
241 if (this.contentPane != null) {
242 InputMap inputMap = contentPane.getInputMap();
243 KeyStroke[] inputKeys = inputMap.keys();
244 if (inputKeys != null) {
245 for (KeyStroke key : inputKeys) {
246 Object binding = inputMap.get(key);
247 if (binding instanceof String && ((String)binding).startsWith("MapMover.")) {
248 inputMap.remove(key);
249 }
250 }
251 }
252 ActionMap actionMap = contentPane.getActionMap();
253 Object[] actionsKeys = actionMap.keys();
254 if (actionsKeys != null) {
255 for (Object key : actionsKeys) {
256 if (key instanceof String && ((String)key).startsWith("MapMover.")) {
257 actionMap.remove(key);
258 }
259 }
260 }
261 }
262 }
263}
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