1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.tools;
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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.KeyEventDispatcher;
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7 | import java.awt.KeyboardFocusManager;
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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.util.HashMap;
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11 | import java.util.Map;
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12 | import java.util.Timer;
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13 | import java.util.TimerTask;
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14 |
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15 | import javax.swing.AbstractAction;
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16 | import javax.swing.Action;
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17 | import javax.swing.JMenuItem;
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18 | import javax.swing.JPanel;
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19 | import javax.swing.JPopupMenu;
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20 | import javax.swing.KeyStroke;
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21 | import javax.swing.SwingUtilities;
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22 | import javax.swing.event.PopupMenuEvent;
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23 | import javax.swing.event.PopupMenuListener;
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24 |
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25 | import org.openstreetmap.josm.Main;
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26 | import org.openstreetmap.josm.tools.MultikeyShortcutAction.MultikeyInfo;
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27 |
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28 | public final class MultikeyActionsHandler {
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29 |
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30 | private static final long DIALOG_DELAY = 1000;
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31 | private static final String STATUS_BAR_ID = "multikeyShortcut";
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32 |
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33 | private final Map<MultikeyShortcutAction, MyAction> myActions = new HashMap<>();
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34 |
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35 | static final class ShowLayersPopupWorker implements Runnable {
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36 | static final class StatusLinePopupMenuListener implements PopupMenuListener {
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37 | @Override
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38 | public void popupMenuWillBecomeVisible(PopupMenuEvent e) {
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39 | // Do nothing
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40 | }
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41 |
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42 | @Override
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43 | public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
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44 | Main.map.statusLine.resetHelpText(STATUS_BAR_ID);
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45 | }
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46 |
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47 | @Override
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48 | public void popupMenuCanceled(PopupMenuEvent e) {
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49 | // Do nothing
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50 | }
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51 | }
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52 |
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53 | private final MyAction action;
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54 |
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55 | ShowLayersPopupWorker(MyAction action) {
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56 | this.action = action;
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57 | }
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58 |
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59 | @Override
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60 | public void run() {
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61 | JPopupMenu layers = new JPopupMenu();
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62 |
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63 | JMenuItem lbTitle = new JMenuItem((String) action.action.getValue(Action.SHORT_DESCRIPTION));
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64 | lbTitle.setEnabled(false);
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65 | JPanel pnTitle = new JPanel();
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66 | pnTitle.add(lbTitle);
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67 | layers.add(pnTitle);
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68 |
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69 | char repeatKey = (char) action.shortcut.getKeyStroke().getKeyCode();
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70 | boolean repeatKeyUsed = false;
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71 |
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72 | for (final MultikeyInfo info: action.action.getMultikeyCombinations()) {
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73 |
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74 | if (info.getShortcut() == repeatKey) {
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75 | repeatKeyUsed = true;
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76 | }
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77 |
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78 | JMenuItem item = new JMenuItem(formatMenuText(action.shortcut.getKeyStroke(),
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79 | String.valueOf(info.getShortcut()), info.getDescription()));
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80 | item.setMnemonic(info.getShortcut());
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81 | item.addActionListener(e -> action.action.executeMultikeyAction(info.getIndex(), false));
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82 | layers.add(item);
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83 | }
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84 |
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85 | if (!repeatKeyUsed) {
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86 | MultikeyInfo lastLayer = action.action.getLastMultikeyAction();
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87 | if (lastLayer != null) {
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88 | JMenuItem repeateItem = new JMenuItem(formatMenuText(action.shortcut.getKeyStroke(),
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89 | KeyEvent.getKeyText(action.shortcut.getKeyStroke().getKeyCode()),
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90 | "Repeat " + lastLayer.getDescription()));
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91 | repeateItem.setMnemonic(action.shortcut.getKeyStroke().getKeyCode());
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92 | repeateItem.addActionListener(e -> action.action.executeMultikeyAction(-1, true));
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93 | layers.add(repeateItem);
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94 | }
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95 | }
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96 | layers.addPopupMenuListener(new StatusLinePopupMenuListener());
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97 | layers.show(Main.parent, Integer.MAX_VALUE, Integer.MAX_VALUE);
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98 | layers.setLocation(Main.parent.getX() + Main.parent.getWidth() - layers.getWidth(),
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99 | Main.parent.getY() + Main.parent.getHeight() - layers.getHeight());
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100 | }
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101 | }
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102 |
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103 | private class MyKeyEventDispatcher implements KeyEventDispatcher {
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104 | @Override
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105 | public boolean dispatchKeyEvent(KeyEvent e) {
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106 |
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107 | if (e.getWhen() == lastTimestamp)
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108 | return false;
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109 |
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110 | if (lastAction != null && e.getID() == KeyEvent.KEY_PRESSED) {
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111 | int index = getIndex(e.getKeyCode());
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112 | if (index >= 0) {
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113 | lastAction.action.executeMultikeyAction(index, e.getKeyCode() == lastAction.shortcut.getKeyStroke().getKeyCode());
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114 | }
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115 | lastAction = null;
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116 | Main.map.statusLine.resetHelpText(STATUS_BAR_ID);
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117 | return true;
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118 | }
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119 | return false;
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120 | }
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121 |
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122 | private int getIndex(int lastKey) {
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123 | if (lastKey >= KeyEvent.VK_1 && lastKey <= KeyEvent.VK_9)
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124 | return lastKey - KeyEvent.VK_1;
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125 | else if (lastKey == KeyEvent.VK_0)
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126 | return 9;
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127 | else if (lastKey >= KeyEvent.VK_A && lastKey <= KeyEvent.VK_Z)
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128 | return lastKey - KeyEvent.VK_A + 10;
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129 | else
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130 | return -1;
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131 | }
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132 | }
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133 |
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134 | private class MyAction extends AbstractAction {
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135 |
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136 | private final transient MultikeyShortcutAction action;
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137 | private final transient Shortcut shortcut;
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138 |
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139 | MyAction(MultikeyShortcutAction action) {
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140 | this.action = action;
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141 | this.shortcut = action.getMultikeyShortcut();
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142 | }
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143 |
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144 | @Override
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145 | public void actionPerformed(ActionEvent e) {
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146 | lastTimestamp = e.getWhen();
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147 | lastAction = this;
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148 | timer.schedule(new MyTimerTask(lastTimestamp, lastAction), DIALOG_DELAY);
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149 | Main.map.statusLine.setHelpText(STATUS_BAR_ID, tr("{0}... [please type its number]", (String) action.getValue(SHORT_DESCRIPTION)));
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150 | }
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151 |
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152 | @Override
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153 | public String toString() {
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154 | return "MultikeyAction" + action;
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155 | }
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156 | }
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157 |
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158 | private class MyTimerTask extends TimerTask {
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159 | private final long lastTimestamp;
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160 | private final MyAction lastAction;
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161 |
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162 | MyTimerTask(long lastTimestamp, MyAction lastAction) {
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163 | this.lastTimestamp = lastTimestamp;
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164 | this.lastAction = lastAction;
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165 | }
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166 |
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167 | @Override
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168 | public void run() {
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169 | if (lastTimestamp == MultikeyActionsHandler.this.lastTimestamp &&
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170 | lastAction == MultikeyActionsHandler.this.lastAction) {
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171 | SwingUtilities.invokeLater(new ShowLayersPopupWorker(lastAction));
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172 | MultikeyActionsHandler.this.lastAction = null;
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173 | }
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174 | }
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175 | }
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176 |
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177 | private long lastTimestamp;
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178 | private MyAction lastAction;
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179 | private final Timer timer;
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180 |
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181 | private MultikeyActionsHandler() {
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182 | KeyboardFocusManager.getCurrentKeyboardFocusManager().addKeyEventDispatcher(new MyKeyEventDispatcher());
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183 | timer = new Timer();
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184 | }
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185 |
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186 | private static MultikeyActionsHandler instance;
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187 |
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188 | /**
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189 | * Replies the unique instance of this class.
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190 | * @return The unique instance of this class
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191 | */
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192 | public static synchronized MultikeyActionsHandler getInstance() {
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193 | if (instance == null) {
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194 | instance = new MultikeyActionsHandler();
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195 | }
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196 | return instance;
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197 | }
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198 |
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199 | private static String formatMenuText(KeyStroke keyStroke, String index, String description) {
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200 | String shortcutText = KeyEvent.getKeyModifiersText(keyStroke.getModifiers()) + '+'
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201 | + KeyEvent.getKeyText(keyStroke.getKeyCode()) + ',' + index;
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202 |
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203 | return "<html><i>" + shortcutText + "</i> " + description;
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204 | }
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205 |
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206 | /**
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207 | * Registers an action and its shortcut
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208 | * @param action The action to add
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209 | */
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210 | public void addAction(MultikeyShortcutAction action) {
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211 | if (action.getMultikeyShortcut() != null) {
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212 | MyAction myAction = new MyAction(action);
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213 | myActions.put(action, myAction);
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214 | Main.registerActionShortcut(myAction, myAction.shortcut);
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215 | }
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216 | }
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217 |
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218 | /**
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219 | * Unregisters an action and its shortcut completely
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220 | * @param action The action to remove
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221 | */
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222 | public void removeAction(MultikeyShortcutAction action) {
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223 | MyAction a = myActions.get(action);
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224 | if (a != null) {
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225 | Main.unregisterActionShortcut(a, a.shortcut);
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226 | myActions.remove(action);
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227 | }
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228 | }
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229 | }
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