Added SystemTray.setEnabled(). Updated test examples.

src/dorkbox/systemTray/SystemTray.java

@@ -59,10 +59,6 @@ class SystemTray implements Menu {
     public static final int TYPE_APP_INDICATOR = 2;
     public static final int TYPE_SWING = 3;
 
-    @Property
-    /** How long to wait when updating menu entries before the request times-out */
-    public static final int TIMEOUT = 2;
-
     @Property
     /** Enables auto-detection for the system tray. This should be mostly successful.
      * <p>
@@ -105,12 +101,14 @@ class SystemTray implements Menu {
      * <p>
      * This is an advanced feature, and it is recommended to leave at 0.
      */
-    public static int FORCE_TRAY_TYPE = 2;
+    public static int FORCE_TRAY_TYPE = 0;
 
     @Property
     /**
      * When in compatibility mode, and the JavaFX/SWT primary windows are closed, we want to make sure that the SystemTray is also closed.
      * This property is available to disable this functionality in situations where you don't want this to happen.
+     * <p>
+     * This is an advanced feature, and it is recommended to leave as true.
      */
     public static boolean ENABLE_SHUTDOWN_HOOK = true;
 
@@ -761,13 +759,13 @@ class SystemTray implements Menu {
         systemTrayMenu.addSeparator();
     }
 
-
     /**
-     * Does nothing. You cannot set the text for the system tray
+     * Shows (if hidden), or hides (if showing) the system tray.
      */
     @Override
     public
     void setEnabled(final boolean enabled) {
+        systemTrayMenu.setEnabled(enabled);
     }
 
     /**

src/dorkbox/systemTray/swing/_AppIndicatorTray.java

@@ -96,6 +96,8 @@ class _AppIndicatorTray extends _Tray {
     // necessary to provide a menu (which we draw over) so we get the "on open" event when the menu is opened via clicking
     private Pointer dummyMenu;
 
+    // is the system tray visible or not.
+    private volatile boolean visible = true;
 
     // appindicators DO NOT support anything other than PLAIN gtk-menus (which we hack to support swing menus)
     //   they ALSO do not support tooltips, so we cater to the lowest common denominator
@@ -198,17 +200,18 @@ class _AppIndicatorTray extends _Tray {
     public
     void shutdown() {
         if (!shuttingDown.getAndSet(true)) {
+            // must happen asap, so our hook properly notices we are in shutdown mode
+            final AppIndicatorInstanceStruct savedAppI = appIndicator;
+            appIndicator = null;
 
             Gtk.dispatch(new Runnable() {
                 @Override
                 public
                 void run() {
                     // STATUS_PASSIVE hides the indicator
-                    AppIndicator.app_indicator_set_status(appIndicator, AppIndicator.STATUS_PASSIVE);
+                    AppIndicator.app_indicator_set_status(savedAppI, AppIndicator.STATUS_PASSIVE);
-                    Pointer p = appIndicator.getPointer();
+                    Pointer p = savedAppI.getPointer();
                     Gobject.g_object_unref(p);
-
-                    appIndicator = null;
                 }
             });
 
@@ -251,4 +254,23 @@ class _AppIndicatorTray extends _Tray {
             }
         });
     }
+
+    public
+    void setEnabled(final boolean setEnabled) {
+        visible = !setEnabled;
+
+        Gtk.dispatch(new Runnable() {
+            @Override
+            public
+            void run() {
+                 if (visible && !setEnabled) {
+                    // STATUS_PASSIVE hides the indicator
+                    AppIndicator.app_indicator_set_status(appIndicator, AppIndicator.STATUS_PASSIVE);
+                }
+                else if (!visible && setEnabled) {
+                    AppIndicator.app_indicator_set_status(appIndicator, AppIndicator.STATUS_ACTIVE);
+                }
+            }
+        });
+    }
 }

src/dorkbox/systemTray/swing/_GtkStatusIconTray.java

@@ -54,6 +54,9 @@ class _GtkStatusIconTray extends _Tray {
 
     private volatile boolean isActive = false;
 
+    // is the system tray visible or not.
+    private volatile boolean visible = true;
+
     // called on the EDT
     public
     _GtkStatusIconTray(final SystemTray systemTray) {
@@ -193,4 +196,21 @@ class _GtkStatusIconTray extends _Tray {
             }
         });
     }
+
+    public
+    void setEnabled(final boolean setEnabled) {
+        visible = !setEnabled;
+
+        Gtk.dispatch(new Runnable() {
+            @Override
+            public
+            void run() {
+                if (visible && !setEnabled) {
+                    Gtk.gtk_status_icon_set_visible(trayIcon, setEnabled);
+                } else if (!visible && setEnabled) {
+                    Gtk.gtk_status_icon_set_visible(trayIcon, setEnabled);
+                }
+            }
+        });
+    }
 }

src/dorkbox/systemTray/swing/_SwingTray.java

@@ -39,8 +39,11 @@ import dorkbox.systemTray.Entry;
 @SuppressWarnings({"SynchronizationOnLocalVariableOrMethodParameter", "WeakerAccess"})
 public
 class _SwingTray extends _Tray {
-    volatile SystemTray tray;
+    private volatile SystemTray tray;
-    volatile TrayIcon trayIcon;
+    private volatile TrayIcon trayIcon;
+
+    // is the system tray visible or not.
+    private volatile boolean visible = true;
 
     // Called in the EDT
     public
@@ -114,4 +117,27 @@ class _SwingTray extends _Tray {
             }
         });
     }
+
+    public
+    void setEnabled(final boolean setEnabled) {
+        visible = !setEnabled;
+
+        dispatch(new Runnable() {
+            @Override
+            public
+            void run() {
+
+                if (visible && !setEnabled) {
+                    tray.remove(trayIcon);
+                }
+                else if (!visible && setEnabled) {
+                    try {
+                        tray.add(trayIcon);
+                    } catch (AWTException e) {
+                        dorkbox.systemTray.SystemTray.logger.error("Error adding the icon back to the tray");
+                    }
+                }
+            }
+        });
+    }
 }

test/dorkbox/TestTray.java

@@ -95,6 +95,14 @@ class TestTray {
                 submenu.setEnabled(false);
             }
         });
+        submenu.addEntry("Hide tray", BLACK_MAIL, new SystemTrayMenuAction() {
+            @Override
+            public
+            void onClick(final SystemTray systemTray, final Menu parent, final Entry entry) {
+                systemTray.setEnabled(false);
+            }
+        });
+
         submenu.addEntry("Remove menu", GREEN_MAIL, new SystemTrayMenuAction() {
             @Override
             public

test/dorkbox/TestTrayJavaFX.java

@@ -129,6 +129,13 @@ class TestTrayJavaFX extends Application {
                 submenu.setEnabled(false);
             }
         });
+        submenu.addEntry("Hide tray", BLACK_MAIL, new SystemTrayMenuAction() {
+            @Override
+            public
+            void onClick(final SystemTray systemTray, final Menu parent, final Entry entry) {
+                systemTray.setEnabled(false);
+            }
+        });
         submenu.addEntry("Remove menu", GREEN_MAIL, new SystemTrayMenuAction() {
             @Override
             public

test/dorkbox/TestTraySwt.java

@@ -113,6 +113,13 @@ class TestTraySwt {
                 submenu.setEnabled(false);
             }
         });
+        submenu.addEntry("Hide tray", BLACK_MAIL, new SystemTrayMenuAction() {
+            @Override
+            public
+            void onClick(final SystemTray systemTray, final Menu parent, final Entry entry) {
+                systemTray.setEnabled(false);
+            }
+        });
         submenu.addEntry("Remove menu", GREEN_MAIL, new SystemTrayMenuAction() {
             @Override
             public