1 | // License: GPL. For details, see LICENSE file.
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2 | package org.openstreetmap.josm.actions;
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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.Component;
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7 | import java.awt.event.ActionEvent;
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8 |
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9 | import org.openstreetmap.josm.data.preferences.BooleanProperty;
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10 | import org.openstreetmap.josm.gui.MainApplication;
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11 | import org.openstreetmap.josm.tools.ImageProvider;
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12 | import org.openstreetmap.josm.tools.ListenerList;
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13 |
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14 | /**
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15 | * This action toggles the Expert mode.
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16 | * @since 4840
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17 | */
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18 | public class ExpertToggleAction extends ToggleAction {
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19 |
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20 | /**
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21 | * This listener is notified whenever the expert mode setting changed.
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22 | */
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23 | @FunctionalInterface
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24 | public interface ExpertModeChangeListener {
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25 | /**
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26 | * The expert mode changed.
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27 | * @param isExpert <code>true</code> if expert mode was enabled, false otherwise.
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28 | */
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29 | void expertChanged(boolean isExpert);
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30 | }
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31 |
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32 | // TODO: Switch to checked list. We can do this as soon as we do not see any more warnings.
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33 | private static final ListenerList<ExpertModeChangeListener> listeners = ListenerList.createUnchecked();
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34 | private static final ListenerList<Component> visibilityToggleListeners = ListenerList.createUnchecked();
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35 |
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36 | private static final BooleanProperty PREF_EXPERT = new BooleanProperty("expert", false);
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37 |
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38 | private static final ExpertToggleAction INSTANCE = new ExpertToggleAction();
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39 |
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40 | private static synchronized void fireExpertModeChanged(boolean isExpert) {
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41 | listeners.fireEvent(listener -> listener.expertChanged(isExpert));
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42 | visibilityToggleListeners.fireEvent(c -> c.setVisible(isExpert));
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43 | }
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44 |
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45 | /**
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46 | * Register a expert mode change listener.
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47 | *
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48 | * @param listener the listener. Ignored if null.
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49 | */
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50 | public static void addExpertModeChangeListener(ExpertModeChangeListener listener) {
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51 | addExpertModeChangeListener(listener, false);
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52 | }
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53 |
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54 | /**
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55 | * Register a expert mode change listener, and optionally fires it.
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56 | * @param listener the listener. Ignored if null.
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57 | * @param fireWhenAdding if true, the listener will be fired immediately after added
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58 | */
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59 | public static synchronized void addExpertModeChangeListener(ExpertModeChangeListener listener, boolean fireWhenAdding) {
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60 | if (listener == null) return;
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61 | listeners.addWeakListener(listener);
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62 | if (fireWhenAdding) {
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63 | listener.expertChanged(isExpert());
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64 | }
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65 | }
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66 |
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67 | /**
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68 | * Removes a expert mode change listener
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69 | *
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70 | * @param listener the listener. Ignored if null.
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71 | */
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72 | public static synchronized void removeExpertModeChangeListener(ExpertModeChangeListener listener) {
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73 | if (listener == null) return;
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74 | listeners.removeListener(listener);
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75 | }
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76 |
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77 | /**
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78 | * Marks a component to be only visible when expert mode is enabled. The visibility of the component is changed automatically.
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79 | * @param c The component.
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80 | */
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81 | public static synchronized void addVisibilitySwitcher(Component c) {
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82 | if (c == null) return;
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83 | visibilityToggleListeners.addWeakListener(c);
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84 | c.setVisible(isExpert());
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85 | }
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86 |
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87 | /**
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88 | * Stops tracking visibility changes for the given component.
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89 | * @param c The component.
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90 | * @see #addVisibilitySwitcher(Component)
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91 | */
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92 | public static synchronized void removeVisibilitySwitcher(Component c) {
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93 | if (c == null) return;
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94 | visibilityToggleListeners.removeListener(c);
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95 | }
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96 |
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97 | /**
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98 | * Determines if the given component tracks visibility changes.
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99 | * @param c The component.
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100 | * @return {@code true} if the given component tracks visibility changes
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101 | * @since 15649
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102 | */
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103 | public static synchronized boolean hasVisibilitySwitcher(Component c) {
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104 | if (c == null) return false;
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105 | return visibilityToggleListeners.containsListener(c);
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106 | }
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107 |
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108 | /**
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109 | * Constructs a new {@code ExpertToggleAction}.
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110 | */
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111 | public ExpertToggleAction() {
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112 | super(tr("Expert Mode"),
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113 | new ImageProvider("expert").setOptional(true),
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114 | tr("Enable/disable expert mode"),
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115 | null,
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116 | false /* register toolbar */, null, false
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117 | );
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118 | setToolbarId("expertmode");
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119 | if (MainApplication.getToolbar() != null) {
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120 | MainApplication.getToolbar().register(this);
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121 | }
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122 | setSelected(PREF_EXPERT.get());
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123 | notifySelectedState();
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124 | }
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125 |
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126 | @Override
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127 | protected final void notifySelectedState() {
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128 | super.notifySelectedState();
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129 | PREF_EXPERT.put(isSelected());
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130 | fireExpertModeChanged(isSelected());
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131 | }
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132 |
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133 | /**
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134 | * Forces the expert mode state to the given state.
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135 | * @param isExpert if expert mode should be used.
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136 | * @since 11224
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137 | */
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138 | public void setExpert(boolean isExpert) {
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139 | if (isSelected() != isExpert) {
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140 | setSelected(isExpert);
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141 | notifySelectedState();
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142 | }
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143 | }
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144 |
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145 | @Override
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146 | public void actionPerformed(ActionEvent e) {
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147 | toggleSelectedState(e);
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148 | notifySelectedState();
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149 | }
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150 |
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151 | /**
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152 | * Replies the unique instance of this action.
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153 | * @return The unique instance of this action
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154 | */
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155 | public static ExpertToggleAction getInstance() {
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156 | return INSTANCE;
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157 | }
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158 |
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159 | /**
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160 | * Determines if expert mode is enabled.
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161 | * @return {@code true} if expert mode is enabled, {@code false} otherwise.
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162 | */
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163 | public static boolean isExpert() {
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164 | return INSTANCE.isSelected();
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165 | }
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166 | }
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