1 | // License: GPL. Copyright 2007 by Immanuel Scholz and others
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2 | package org.openstreetmap.josm.gui;
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3 |
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4 | import static org.openstreetmap.josm.tools.I18n.tr;
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5 |
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6 | import java.awt.Cursor;
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7 | import java.awt.Point;
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8 | import java.awt.event.ActionEvent;
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9 | import java.awt.event.KeyEvent;
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10 | import java.awt.event.MouseAdapter;
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11 | import java.awt.event.MouseEvent;
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12 | import java.awt.event.MouseMotionListener;
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13 | import java.awt.event.MouseWheelEvent;
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14 | import java.awt.event.MouseWheelListener;
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15 |
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16 | import javax.swing.AbstractAction;
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17 | import javax.swing.JComponent;
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18 | import javax.swing.JPanel;
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19 |
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20 | import org.openstreetmap.josm.Main;
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21 | import org.openstreetmap.josm.data.coor.EastNorth;
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22 | import org.openstreetmap.josm.tools.PlatformHookOsx;
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23 | import org.openstreetmap.josm.tools.Shortcut;
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24 |
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25 | /**
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26 | * Enables moving of the map by holding down the right mouse button and drag
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27 | * the mouse. Also, enables zooming by the mouse wheel.
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28 | *
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29 | * @author imi
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30 | */
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31 | public class MapMover extends MouseAdapter implements MouseMotionListener, MouseWheelListener {
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32 |
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33 | private final class ZoomerAction extends AbstractAction {
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34 | private final String action;
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35 | public ZoomerAction(String action) {
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36 | this.action = action;
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37 | }
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38 | public void actionPerformed(ActionEvent e) {
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39 | if (action.equals(".") || action.equals(",")) {
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40 | Point mouse = nc.getMousePosition();
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41 | if (mouse == null)
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42 | mouse = new Point((int)nc.getBounds().getCenterX(), (int)nc.getBounds().getCenterY());
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43 | 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);
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44 | mouseWheelMoved(we);
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45 | } else {
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46 | EastNorth center = nc.getCenter();
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47 | EastNorth newcenter = nc.getEastNorth(nc.getWidth()/2+nc.getWidth()/5, nc.getHeight()/2+nc.getHeight()/5);
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48 | if (action.equals("left"))
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49 | nc.zoomTo(new EastNorth(2*center.east()-newcenter.east(), center.north()));
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50 | else if (action.equals("right"))
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51 | nc.zoomTo(new EastNorth(newcenter.east(), center.north()));
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52 | else if (action.equals("up"))
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53 | nc.zoomTo(new EastNorth(center.east(), 2*center.north()-newcenter.north()));
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54 | else if (action.equals("down"))
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55 | nc.zoomTo(new EastNorth(center.east(), newcenter.north()));
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56 | }
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57 | }
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58 | }
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59 |
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60 | /**
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61 | * The point in the map that was the under the mouse point
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62 | * when moving around started.
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63 | */
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64 | private EastNorth mousePosMove;
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65 | /**
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66 | * The map to move around.
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67 | */
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68 | private final NavigatableComponent nc;
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69 |
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70 | private boolean movementInPlace = false;
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71 |
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72 | /**
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73 | * Create a new MapMover
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74 | */
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75 | public MapMover(NavigatableComponent navComp, JPanel contentPane) {
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76 | this.nc = navComp;
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77 | nc.addMouseListener(this);
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78 | nc.addMouseMotionListener(this);
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79 | nc.addMouseWheelListener(this);
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80 |
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81 | if (contentPane != null) {
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82 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
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83 | Shortcut.registerShortcut("system:movefocusright", tr("Map: {0}", tr("Move right")), KeyEvent.VK_RIGHT, Shortcut.GROUP_HOTKEY).getKeyStroke(),
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84 | "MapMover.Zoomer.right");
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85 | contentPane.getActionMap().put("MapMover.Zoomer.right", new ZoomerAction("right"));
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86 |
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87 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
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88 | Shortcut.registerShortcut("system:movefocusleft", tr("Map: {0}", tr("Move left")), KeyEvent.VK_LEFT, Shortcut.GROUP_HOTKEY).getKeyStroke(),
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89 | "MapMover.Zoomer.left");
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90 | contentPane.getActionMap().put("MapMover.Zoomer.left", new ZoomerAction("left"));
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91 |
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92 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
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93 | Shortcut.registerShortcut("system:movefocusup", tr("Map: {0}", tr("Move up")), KeyEvent.VK_UP, Shortcut.GROUP_HOTKEY).getKeyStroke(),
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94 | "MapMover.Zoomer.up");
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95 | contentPane.getActionMap().put("MapMover.Zoomer.up", new ZoomerAction("up"));
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96 |
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97 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
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98 | Shortcut.registerShortcut("system:movefocusdown", tr("Map: {0}", tr("Move down")), KeyEvent.VK_DOWN, Shortcut.GROUP_HOTKEY).getKeyStroke(),
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99 | "MapMover.Zoomer.down");
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100 | contentPane.getActionMap().put("MapMover.Zoomer.down", new ZoomerAction("down"));
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101 |
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102 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
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103 | Shortcut.registerShortcut("view:zoominalternate", tr("Map: {0}", tr("Zoom in")), KeyEvent.VK_COMMA, Shortcut.GROUP_HOTKEY).getKeyStroke(),
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104 | "MapMover.Zoomer.in");
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105 | contentPane.getActionMap().put("MapMover.Zoomer.in", new ZoomerAction(","));
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106 |
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107 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
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108 | Shortcut.registerShortcut("view:zoomoutalternate", tr("Map: {0}", tr("Zoom out")), KeyEvent.VK_PERIOD, Shortcut.GROUP_HOTKEY).getKeyStroke(),
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109 | "MapMover.Zoomer.out");
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110 | contentPane.getActionMap().put("MapMover.Zoomer.out", new ZoomerAction("."));
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111 | }
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112 | }
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113 |
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114 | /**
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115 | * If the right (and only the right) mouse button is pressed, move the map
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116 | */
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117 | public void mouseDragged(MouseEvent e) {
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118 | int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK;
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119 | if ((e.getModifiersEx() & (MouseEvent.BUTTON3_DOWN_MASK | offMask)) == MouseEvent.BUTTON3_DOWN_MASK) {
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120 | if (mousePosMove == null)
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121 | startMovement(e);
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122 | EastNorth center = nc.getCenter();
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123 | EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY());
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124 | nc.zoomTo(new EastNorth(
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125 | mousePosMove.east() + center.east() - mouseCenter.east(),
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126 | mousePosMove.north() + center.north() - mouseCenter.north()));
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127 | } else
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128 | endMovement();
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129 | }
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130 |
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131 | /**
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132 | * Start the movement, if it was the 3rd button (right button).
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133 | */
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134 | @Override public void mousePressed(MouseEvent e) {
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135 | int offMask = MouseEvent.BUTTON1_DOWN_MASK | MouseEvent.BUTTON2_DOWN_MASK;
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136 | int macMouseMask = MouseEvent.CTRL_DOWN_MASK | MouseEvent.BUTTON1_DOWN_MASK;
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137 | if (e.getButton() == MouseEvent.BUTTON3 && (e.getModifiersEx() & offMask) == 0) {
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138 | startMovement(e);
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139 | } else if (isPlatformOsx() && e.getModifiersEx() == macMouseMask) {
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140 | startMovement(e);
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141 | }
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142 | }
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143 |
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144 | /**
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145 | * Change the cursor back to it's pre-move cursor.
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146 | */
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147 | @Override public void mouseReleased(MouseEvent e) {
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148 | if (e.getButton() == MouseEvent.BUTTON3) {
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149 | endMovement();
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150 | } else if (isPlatformOsx() && e.getButton() == MouseEvent.BUTTON1) {
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151 | endMovement();
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152 | }
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153 | }
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154 |
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155 | /**
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156 | * Start movement by setting a new cursor and remember the current mouse
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157 | * position.
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158 | * @param e The mouse event that leat to the movement from.
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159 | */
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160 | private void startMovement(MouseEvent e) {
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161 | if (movementInPlace)
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162 | return;
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163 | movementInPlace = true;
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164 | mousePosMove = nc.getEastNorth(e.getX(), e.getY());
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165 | nc.setNewCursor(Cursor.MOVE_CURSOR, this);
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166 | }
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167 |
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168 | /**
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169 | * End the movement. Setting back the cursor and clear the movement variables
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170 | */
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171 | private void endMovement() {
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172 | if (!movementInPlace)
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173 | return;
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174 | movementInPlace = false;
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175 | nc.resetCursor(this);
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176 | mousePosMove = null;
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177 | }
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178 |
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179 | /**
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180 | * Zoom the map by 1/5th of current zoom per wheel-delta.
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181 | * @param e The wheel event.
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182 | */
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183 | public void mouseWheelMoved(MouseWheelEvent e) {
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184 | nc.zoomToFactor(e.getX(), e.getY(), Math.pow(0.8, - e.getWheelRotation()));
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185 | }
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186 |
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187 | /**
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188 | * Emulates dragging on Mac OSX
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189 | */
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190 | public void mouseMoved(MouseEvent e) {
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191 | if (!movementInPlace)
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192 | return;
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193 | // Mac OSX simulates with ctrl + mouse 1 the second mouse button hence no dragging events get fired.
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194 | // Is only the selected mouse button pressed?
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195 | if (isPlatformOsx()) {
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196 | if (e.getModifiersEx() == MouseEvent.CTRL_DOWN_MASK) {
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197 | if (mousePosMove == null) {
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198 | startMovement(e);
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199 | }
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200 | EastNorth center = nc.getCenter();
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201 | EastNorth mouseCenter = nc.getEastNorth(e.getX(), e.getY());
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202 | nc.zoomTo(new EastNorth(mousePosMove.east() + center.east() - mouseCenter.east(), mousePosMove.north()
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203 | + center.north() - mouseCenter.north()));
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204 | } else {
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205 | endMovement();
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206 | }
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207 | }
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208 | }
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209 |
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210 | /**
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211 | * Replies true if we are currently running on OSX
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212 | *
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213 | * @return true if we are currently running on OSX
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214 | */
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215 | public static boolean isPlatformOsx() {
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216 | return Main.platform != null && Main.platform instanceof PlatformHookOsx;
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217 | }
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218 |
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219 | }
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