[4840] | 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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[4843] | 6 | import java.awt.Component;
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[4840] | 7 | import java.awt.event.ActionEvent;
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| 8 | import java.lang.ref.WeakReference;
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| 9 | import java.util.ArrayList;
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| 10 | import java.util.Iterator;
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| 11 | import java.util.List;
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| 12 |
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| 13 | import org.openstreetmap.josm.Main;
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| 14 |
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[6220] | 15 | /**
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| 16 | * This action toggles the Expert mode.
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| 17 | * @since 4840
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| 18 | */
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| 19 | public class ExpertToggleAction extends ToggleAction {
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[4840] | 20 |
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| 21 | public interface ExpertModeChangeListener {
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| 22 | void expertChanged(boolean isExpert);
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| 23 | }
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| 24 |
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| 25 | private static final List<WeakReference<ExpertModeChangeListener>> listeners = new ArrayList<WeakReference<ExpertModeChangeListener>>();
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[4843] | 26 | private static final List<WeakReference<Component>> visibilityToggleListeners = new ArrayList<WeakReference<Component>>();
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[4840] | 27 |
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[4843] | 28 | private static ExpertToggleAction INSTANCE = new ExpertToggleAction();
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| 29 |
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[4840] | 30 | private synchronized static void fireExpertModeChanged(boolean isExpert) {
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[4843] | 31 | {
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| 32 | Iterator<WeakReference<ExpertModeChangeListener>> it = listeners.iterator();
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| 33 | while (it.hasNext()) {
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| 34 | WeakReference<ExpertModeChangeListener> wr = it.next();
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| 35 | ExpertModeChangeListener listener = wr.get();
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| 36 | if (listener == null) {
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| 37 | it.remove();
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| 38 | continue;
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| 39 | }
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| 40 | listener.expertChanged(isExpert);
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[4840] | 41 | }
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| 42 | }
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[4843] | 43 | {
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| 44 | Iterator<WeakReference<Component>> it = visibilityToggleListeners.iterator();
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| 45 | while (it.hasNext()) {
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| 46 | WeakReference<Component> wr = it.next();
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| 47 | Component c = wr.get();
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| 48 | if (c == null) {
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| 49 | it.remove();
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| 50 | continue;
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| 51 | }
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| 52 | c.setVisible(isExpert);
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| 53 | }
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| 54 | }
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[4840] | 55 | }
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| 56 |
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| 57 | /**
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[4841] | 58 | * Register a expert mode change listener
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[4840] | 59 | *
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| 60 | * @param listener the listener. Ignored if null.
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| 61 | */
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| 62 | public static void addExpertModeChangeListener(ExpertModeChangeListener listener) {
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| 63 | addExpertModeChangeListener(listener, false);
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| 64 | }
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| 65 |
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| 66 | public synchronized static void addExpertModeChangeListener(ExpertModeChangeListener listener, boolean fireWhenAdding) {
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| 67 | if (listener == null) return;
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| 68 | for (WeakReference<ExpertModeChangeListener> wr : listeners) {
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| 69 | // already registered ? => abort
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| 70 | if (wr.get() == listener) return;
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| 71 | }
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| 72 | listeners.add(new WeakReference<ExpertModeChangeListener>(listener));
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| 73 | if (fireWhenAdding) {
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[4843] | 74 | listener.expertChanged(isExpert());
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[4840] | 75 | }
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| 76 | }
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| 77 |
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| 78 | /**
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[4841] | 79 | * Removes a expert mode change listener
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[4840] | 80 | *
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| 81 | * @param listener the listener. Ignored if null.
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| 82 | */
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| 83 | public synchronized static void removeExpertModeChangeListener(ExpertModeChangeListener listener) {
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| 84 | if (listener == null) return;
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| 85 | Iterator<WeakReference<ExpertModeChangeListener>> it = listeners.iterator();
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| 86 | while (it.hasNext()) {
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| 87 | WeakReference<ExpertModeChangeListener> wr = it.next();
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| 88 | // remove the listener - and any other listener which god garbage
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| 89 | // collected in the meantime
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| 90 | if (wr.get() == null || wr.get() == listener) {
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| 91 | it.remove();
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| 92 | }
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| 93 | }
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| 94 | }
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| 95 |
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[4843] | 96 | public synchronized static void addVisibilitySwitcher(Component c) {
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| 97 | if (c == null) return;
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| 98 | for (WeakReference<Component> wr : visibilityToggleListeners) {
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| 99 | // already registered ? => abort
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| 100 | if (wr.get() == c) return;
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| 101 | }
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| 102 | visibilityToggleListeners.add(new WeakReference<Component>(c));
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| 103 | c.setVisible(isExpert());
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| 104 | }
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| 105 |
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| 106 | public synchronized static void removeVisibilitySwitcher(Component c) {
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| 107 | if (c == null) return;
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| 108 | Iterator<WeakReference<Component>> it = visibilityToggleListeners.iterator();
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| 109 | while (it.hasNext()) {
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| 110 | WeakReference<Component> wr = it.next();
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| 111 | // remove the listener - and any other listener which god garbage
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| 112 | // collected in the meantime
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| 113 | if (wr.get() == null || wr.get() == c) {
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| 114 | it.remove();
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| 115 | }
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| 116 | }
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| 117 | }
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| 118 |
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[6220] | 119 | /**
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| 120 | * Constructs a new {@code ExpertToggleAction}.
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| 121 | */
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[4840] | 122 | public ExpertToggleAction() {
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[6220] | 123 | super(tr("Expert Mode"),
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| 124 | "expert",
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| 125 | tr("Enable/disable expert mode"),
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| 126 | null,
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| 127 | false /* register toolbar */
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[4840] | 128 | );
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| 129 | putValue("toolbar", "expertmode");
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| 130 | Main.toolbar.register(this);
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[6220] | 131 | setSelected(Main.pref.getBoolean("expert", false));
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[4840] | 132 | notifySelectedState();
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| 133 | }
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| 134 |
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| 135 | protected void notifySelectedState() {
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[6220] | 136 | super.notifySelectedState();
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| 137 | fireExpertModeChanged(isSelected());
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[4840] | 138 | }
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| 139 |
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[6084] | 140 | @Override
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[4840] | 141 | public void actionPerformed(ActionEvent e) {
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| 142 | toggleSelectedState();
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[6220] | 143 | Main.pref.put("expert", isSelected());
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| 144 | notifySelectedState();
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[4840] | 145 | }
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| 146 |
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[6220] | 147 | /**
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| 148 | * Replies the unique instance of this action.
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| 149 | * @return The unique instance of this action
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| 150 | */
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[4843] | 151 | public static ExpertToggleAction getInstance() {
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| 152 | return INSTANCE;
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| 153 | }
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| 154 |
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[6220] | 155 | /**
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| 156 | * Determines if expert mode is enabled.
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| 157 | * @return {@code true} if expert mode is enabled, {@code false} otherwise.
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| 158 | */
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[4843] | 159 | public static boolean isExpert() {
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| 160 | return INSTANCE.isSelected();
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| 161 | }
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[4840] | 162 | }
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