Added watchdogs for *.application folders to refresh app groups

src/core/widgets/category_list_widget.py

@@ -4,6 +4,8 @@
 import gi
 gi.require_version('Gtk', '3.0')
 from gi.repository import Gtk
+from gi.repository import GLib
+from gi.repository import Gio
 
 from xdg.DesktopEntry import DesktopEntry
 
@@ -18,8 +20,9 @@ class CategoryListWidget(Gtk.ButtonBox):
         super(CategoryListWidget, self).__init__()
 
         self.ctx                  = self.get_style_context()
-        self.active_category: str = 'Accessories'
+        self.dir_watchers: []     = []
 
+        self.active_category: str = 'Accessories'
         self.category_dict: {} = {
             "Accessories": [],
             "Multimedia":  [],
@@ -48,11 +51,10 @@ class CategoryListWidget(Gtk.ButtonBox):
         self.ctx.add_class("category-list-widget")
 
     def _setup_signals(self):
-        event_system.subscribe("refresh-active-category", self.refresh_active_category)
+        self._load_dir_watchers()
 
     def _subscribe_to_events(self):
-        ...
-
+        event_system.subscribe("refresh-active-category", self.refresh_active_category)
 
     def _load_widgets(self):
         for category in self.category_dict.keys():
@@ -62,8 +64,45 @@ class CategoryListWidget(Gtk.ButtonBox):
 
             self.add(button)
 
-    def set_active_category(self, button):
-        self.active_category = button.get_label()
+    def _reset_dir_watchers(self):
+        self._clear_dir_watchers()
+        self._load_dir_watchers()
+
+    def _load_dir_watchers(self):
+        for dpath in settings_manager.settings.config.application_dirs:
+            dir_watcher  = Gio.File.new_for_path(dpath).monitor_directory(
+                                Gio.FileMonitorFlags.WATCH_MOVES,
+                                Gio.Cancellable()
+                            )
+
+            watch_id = dir_watcher.connect(
+                "changed",
+                self._dir_watch_updates
+            )
+
+            dir_watcher.watch_id = watch_id
+            self.dir_watchers.append(dir_watcher)
+
+    def _clear_dir_watchers(self):
+        for watcher in self.dir_watchers:
+            watcher.cancel()
+            watcher.disconnect(watcher.watch_id)
+            watcher.run_dispose()
+
+        self.dir_watchers.clear()
+
+    def _dir_watch_updates(self, file_monitor, file, other_file = None, eve_type = None):
+        if eve_type in  [Gio.FileMonitorEvent.CREATED, Gio.FileMonitorEvent.DELETED,
+                        Gio.FileMonitorEvent.RENAMED, Gio.FileMonitorEvent.MOVED_IN,
+                        Gio.FileMonitorEvent.MOVED_OUT]:
+
+            GLib.idle_add(self._reload_meu)
+
+    def _reload_meu(self):
+        for group in self.category_dict:
+            self.category_dict[group].clear()
+
+        self.fill_menu_objects()
         event_system.emit(
             "load-active-category",
             (self.category_dict[ self.active_category ],)
@@ -121,6 +160,13 @@ class CategoryListWidget(Gtk.ButtonBox):
                 }
             )
 
+    def set_active_category(self, button):
+        self.active_category = button.get_label()
+        event_system.emit(
+            "load-active-category",
+            (self.category_dict[ self.active_category ],)
+        )
+
     def refresh_active_category(self):
         event_system.emit(
             "load-active-category",