1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.gui.bbox;
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3 |
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4 | import java.awt.Point;
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5 | import java.awt.event.ActionEvent;
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6 | import java.awt.event.InputEvent;
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7 | import java.awt.event.KeyEvent;
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8 | import java.awt.event.MouseAdapter;
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9 | import java.awt.event.MouseEvent;
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10 | import java.util.Timer;
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11 | import java.util.TimerTask;
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12 |
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13 | import javax.swing.AbstractAction;
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14 | import javax.swing.ActionMap;
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15 | import javax.swing.InputMap;
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16 | import javax.swing.JComponent;
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17 | import javax.swing.JPanel;
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18 | import javax.swing.KeyStroke;
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19 |
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20 | import org.openstreetmap.josm.tools.PlatformManager;
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21 |
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22 | /**
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23 | * This class controls the user input by listening to mouse and key events.
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24 | * Currently implemented is: - zooming in and out with scrollwheel - zooming in
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25 | * and centering by double clicking - selecting an area by clicking and dragging
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26 | * the mouse
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27 | *
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28 | * @author Tim Haussmann
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29 | */
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30 | public class SlippyMapControler extends MouseAdapter {
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31 |
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32 | /** A Timer for smoothly moving the map area */
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33 | private static final Timer TIMER = new Timer(true);
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34 |
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35 | /** Does the moving */
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36 | private MoveTask moveTask = new MoveTask();
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37 |
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38 | /** How often to do the moving (milliseconds) */
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39 | private static final long timerInterval = 20;
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40 |
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41 | /** The maximum speed (pixels per timer interval) */
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42 | private static final double MAX_SPEED = 20;
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43 |
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44 | /** The speed increase per timer interval when a cursor button is clicked */
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45 | private static final double ACCELERATION = 0.10;
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46 |
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47 | private static final int MAC_MOUSE_BUTTON3_MASK = MouseEvent.CTRL_DOWN_MASK | MouseEvent.BUTTON1_DOWN_MASK;
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48 |
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49 | private static final String[] N = {
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50 | ",", ".", "up", "right", "down", "left"};
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51 | private static final int[] K = {
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52 | KeyEvent.VK_COMMA, KeyEvent.VK_PERIOD, KeyEvent.VK_UP, KeyEvent.VK_RIGHT, KeyEvent.VK_DOWN, KeyEvent.VK_LEFT};
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53 |
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54 | // start and end point of selection rectangle
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55 | private Point iStartSelectionPoint;
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56 | private Point iEndSelectionPoint;
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57 |
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58 | private final SlippyMapBBoxChooser iSlippyMapChooser;
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59 |
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60 | private boolean isSelecting;
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61 |
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62 | /**
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63 | * Constructs a new {@code SlippyMapControler}.
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64 | * @param navComp navigatable component
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65 | * @param contentPane content pane
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66 | */
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67 | public SlippyMapControler(SlippyMapBBoxChooser navComp, JPanel contentPane) {
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68 | iSlippyMapChooser = navComp;
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69 | iSlippyMapChooser.addMouseListener(this);
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70 | iSlippyMapChooser.addMouseMotionListener(this);
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71 |
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72 | if (contentPane != null) {
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73 | for (int i = 0; i < N.length; ++i) {
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74 | contentPane.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW).put(
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75 | KeyStroke.getKeyStroke(K[i], KeyEvent.CTRL_DOWN_MASK), "MapMover.Zoomer." + N[i]);
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76 | }
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77 | }
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78 | isSelecting = false;
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79 |
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80 | InputMap inputMap = navComp.getInputMap(JComponent.WHEN_IN_FOCUSED_WINDOW);
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81 | ActionMap actionMap = navComp.getActionMap();
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82 |
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83 | // map moving
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84 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0, false), "MOVE_RIGHT");
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85 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0, false), "MOVE_LEFT");
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86 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0, false), "MOVE_UP");
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87 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0, false), "MOVE_DOWN");
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88 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_RIGHT, 0, true), "STOP_MOVE_HORIZONTALLY");
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89 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_LEFT, 0, true), "STOP_MOVE_HORIZONTALLY");
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90 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, 0, true), "STOP_MOVE_VERTICALLY");
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91 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, 0, true), "STOP_MOVE_VERTICALLY");
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92 |
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93 | // zooming. To avoid confusion about which modifier key to use,
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94 | // we just add all keys left of the space bar
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95 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, InputEvent.CTRL_DOWN_MASK, false), "ZOOM_IN");
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96 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, InputEvent.META_DOWN_MASK, false), "ZOOM_IN");
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97 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_UP, InputEvent.ALT_DOWN_MASK, false), "ZOOM_IN");
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98 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_ADD, 0, false), "ZOOM_IN");
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99 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_PLUS, 0, false), "ZOOM_IN");
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100 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_EQUALS, 0, false), "ZOOM_IN");
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101 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_EQUALS, InputEvent.SHIFT_DOWN_MASK, false), "ZOOM_IN");
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102 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, InputEvent.CTRL_DOWN_MASK, false), "ZOOM_OUT");
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103 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, InputEvent.META_DOWN_MASK, false), "ZOOM_OUT");
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104 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_DOWN, InputEvent.ALT_DOWN_MASK, false), "ZOOM_OUT");
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105 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_SUBTRACT, 0, false), "ZOOM_OUT");
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106 | inputMap.put(KeyStroke.getKeyStroke(KeyEvent.VK_MINUS, 0, false), "ZOOM_OUT");
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107 |
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108 | // action mapping
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109 | actionMap.put("MOVE_RIGHT", new MoveXAction(1));
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110 | actionMap.put("MOVE_LEFT", new MoveXAction(-1));
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111 | actionMap.put("MOVE_UP", new MoveYAction(-1));
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112 | actionMap.put("MOVE_DOWN", new MoveYAction(1));
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113 | actionMap.put("STOP_MOVE_HORIZONTALLY", new MoveXAction(0));
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114 | actionMap.put("STOP_MOVE_VERTICALLY", new MoveYAction(0));
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115 | actionMap.put("ZOOM_IN", new ZoomInAction());
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116 | actionMap.put("ZOOM_OUT", new ZoomOutAction());
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117 | }
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118 |
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119 | /**
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120 | * Start drawing the selection rectangle if it was the 1st button (left button)
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121 | */
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122 | @Override
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123 | public void mousePressed(MouseEvent e) {
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124 | if (e.getButton() == MouseEvent.BUTTON1 && !(PlatformManager.isPlatformOsx() && e.getModifiersEx() == MAC_MOUSE_BUTTON3_MASK)) {
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125 | iStartSelectionPoint = e.getPoint();
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126 | iEndSelectionPoint = e.getPoint();
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127 | }
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128 | }
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129 |
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130 | @Override
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131 | public void mouseDragged(MouseEvent e) {
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132 | if (iStartSelectionPoint != null && (e.getModifiersEx() & MouseEvent.BUTTON1_DOWN_MASK) == MouseEvent.BUTTON1_DOWN_MASK
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133 | && !(PlatformManager.isPlatformOsx() && e.getModifiersEx() == MAC_MOUSE_BUTTON3_MASK)) {
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134 | iEndSelectionPoint = e.getPoint();
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135 | iSlippyMapChooser.setSelection(iStartSelectionPoint, iEndSelectionPoint);
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136 | isSelecting = true;
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137 | }
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138 | }
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139 |
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140 | /**
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141 | * When dragging the map change the cursor back to it's pre-move cursor. If
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142 | * a double-click occurs center and zoom the map on the clicked location.
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143 | */
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144 | @Override
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145 | public void mouseReleased(MouseEvent e) {
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146 | if (e.getButton() == MouseEvent.BUTTON1) {
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147 |
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148 | if (isSelecting && e.getClickCount() == 1) {
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149 | iSlippyMapChooser.setSelection(iStartSelectionPoint, e.getPoint());
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150 |
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151 | // reset the selections start and end
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152 | iEndSelectionPoint = null;
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153 | iStartSelectionPoint = null;
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154 | isSelecting = false;
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155 |
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156 | } else {
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157 | iSlippyMapChooser.handleAttribution(e.getPoint(), true);
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158 | }
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159 | }
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160 | }
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161 |
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162 | @Override
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163 | public void mouseMoved(MouseEvent e) {
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164 | iSlippyMapChooser.handleAttribution(e.getPoint(), false);
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165 | }
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166 |
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167 | private class MoveXAction extends AbstractAction {
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168 |
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169 | private final int direction;
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170 |
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171 | MoveXAction(int direction) {
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172 | this.direction = direction;
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173 | }
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174 |
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175 | @Override
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176 | public void actionPerformed(ActionEvent e) {
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177 | moveTask.setDirectionX(direction);
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178 | }
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179 | }
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180 |
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181 | private class MoveYAction extends AbstractAction {
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182 |
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183 | private final int direction;
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184 |
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185 | MoveYAction(int direction) {
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186 | this.direction = direction;
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187 | }
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188 |
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189 | @Override
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190 | public void actionPerformed(ActionEvent e) {
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191 | moveTask.setDirectionY(direction);
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192 | }
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193 | }
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194 |
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195 | /** Moves the map depending on which cursor keys are pressed (or not) */
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196 | private class MoveTask extends TimerTask {
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197 | /** The current x speed (pixels per timer interval) */
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198 | private double speedX = 1;
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199 |
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200 | /** The current y speed (pixels per timer interval) */
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201 | private double speedY = 1;
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202 |
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203 | /** The horizontal direction of movement, -1:left, 0:stop, 1:right */
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204 | private int directionX;
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205 |
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206 | /** The vertical direction of movement, -1:up, 0:stop, 1:down */
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207 | private int directionY;
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208 |
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209 | /**
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210 | * Indicated if <code>moveTask</code> is currently enabled (periodically
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211 | * executed via timer) or disabled
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212 | */
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213 | protected boolean scheduled;
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214 |
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215 | protected void setDirectionX(int directionX) {
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216 | this.directionX = directionX;
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217 | updateScheduleStatus();
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218 | }
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219 |
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220 | protected void setDirectionY(int directionY) {
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221 | this.directionY = directionY;
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222 | updateScheduleStatus();
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223 | }
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224 |
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225 | private void updateScheduleStatus() {
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226 | boolean newMoveTaskState = !(directionX == 0 && directionY == 0);
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227 |
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228 | if (newMoveTaskState != scheduled) {
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229 | scheduled = newMoveTaskState;
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230 | if (newMoveTaskState) {
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231 | TIMER.schedule(this, 0, timerInterval);
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232 | } else {
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233 | // We have to create a new instance because rescheduling a
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234 | // once canceled TimerTask is not possible
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235 | moveTask = new MoveTask();
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236 | cancel(); // Stop this TimerTask
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237 | }
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238 | }
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239 | }
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240 |
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241 | @Override
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242 | public void run() {
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243 | // update the x speed
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244 | switch (directionX) {
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245 | case -1:
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246 | if (speedX > -1) {
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247 | speedX = -1;
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248 | }
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249 | if (speedX > -1 * MAX_SPEED) {
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250 | speedX -= ACCELERATION;
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251 | }
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252 | break;
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253 | case 0:
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254 | speedX = 0;
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255 | break;
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256 | case 1:
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257 | if (speedX < 1) {
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258 | speedX = 1;
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259 | }
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260 | if (speedX < MAX_SPEED) {
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261 | speedX += ACCELERATION;
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262 | }
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263 | break;
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264 | default:
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265 | throw new IllegalStateException(Integer.toString(directionX));
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266 | }
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267 |
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268 | // update the y speed
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269 | switch (directionY) {
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270 | case -1:
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271 | if (speedY > -1) {
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272 | speedY = -1;
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273 | }
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274 | if (speedY > -1 * MAX_SPEED) {
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275 | speedY -= ACCELERATION;
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276 | }
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277 | break;
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278 | case 0:
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279 | speedY = 0;
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280 | break;
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281 | case 1:
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282 | if (speedY < 1) {
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283 | speedY = 1;
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284 | }
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285 | if (speedY < MAX_SPEED) {
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286 | speedY += ACCELERATION;
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287 | }
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288 | break;
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289 | default:
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290 | throw new IllegalStateException(Integer.toString(directionY));
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291 | }
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292 |
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293 | // move the map
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294 | int moveX = (int) Math.floor(speedX);
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295 | int moveY = (int) Math.floor(speedY);
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296 | if (moveX != 0 || moveY != 0) {
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297 | iSlippyMapChooser.moveMap(moveX, moveY);
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298 | }
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299 | }
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300 | }
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301 |
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302 | private class ZoomInAction extends AbstractAction {
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303 |
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304 | @Override
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305 | public void actionPerformed(ActionEvent e) {
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306 | iSlippyMapChooser.zoomIn();
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307 | }
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308 | }
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309 |
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310 | private class ZoomOutAction extends AbstractAction {
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311 |
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312 | @Override
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313 | public void actionPerformed(ActionEvent e) {
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314 | iSlippyMapChooser.zoomOut();
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315 | }
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316 | }
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317 | }
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