Update

src/ui_tray_icon.rs

@@ -0,0 +1,21 @@
+use app_state::*;
+use gtk::prelude::*;
+use gtk;
+
+
+
+pub fn init_tray_icon(appstate: &AppS) {
+
+    let ref tray_icon = appstate.status_icon;
+
+    let popup_window: gtk::Window =
+        appstate.builder_popup.get_object("popup_window").unwrap();
+
+    tray_icon.connect_activate(move |_| if popup_window.get_visible() {
+        popup_window.hide();
+    } else {
+        popup_window.show_now();
+    });
+    tray_icon.set_visible(true);
+}
+