Updates toplevel menu item state depending on window state.

src/tl_menu.c

@@ -29,6 +29,9 @@ struct _wlmaker_tl_menu_t {
     /** Pointer to the window's @ref wlmtk_menu_t. */
     wlmtk_menu_t              *menu_ptr;
 
+    /** Listener for @ref wlmtk_window_events_t::state_changed. */
+    struct wl_listener        window_state_changed_listener;
+
     /** Action item for 'Maximize'. */
     wlmaker_action_item_t     *maximize_ai_ptr;
     /** Action item for 'Unmaximize'. */
@@ -47,6 +50,10 @@ struct _wlmaker_tl_menu_t {
     wlmaker_action_item_t     *close_ai_ptr;
 };
 
+static void _wlmaker_tl_menu_handle_window_state_changed(
+    struct wl_listener *listener_ptr,
+    void *data_ptr);
+
 /* == Data ================================================================= */
 
 /** Menu items for the XDG toplevel's window menu. */
@@ -132,6 +139,15 @@ wlmaker_tl_menu_t *wlmaker_tl_menu_create(
             wlmaker_action_item_menu_item(ai_ptr));
     }
 
+    // Connect state listener and initialize state.
+    wlmtk_util_connect_listener_signal(
+        &wlmtk_window_events(window_ptr)->state_changed,
+        &tl_menu_ptr->window_state_changed_listener,
+        _wlmaker_tl_menu_handle_window_state_changed);
+    _wlmaker_tl_menu_handle_window_state_changed(
+        &tl_menu_ptr->window_state_changed_listener,
+        window_ptr);
+
     return tl_menu_ptr;
 }
 
@@ -143,4 +159,33 @@ void wlmaker_tl_menu_destroy(wlmaker_tl_menu_t *tl_menu_ptr)
 
 /* == Local (static) methods =============================================== */
 
+/* ------------------------------------------------------------------------- */
+/** Handles state changes: Updates the menu items accordingly. */
+void _wlmaker_tl_menu_handle_window_state_changed(
+    struct wl_listener *listener_ptr,
+    void *data_ptr)
+{
+    wlmaker_tl_menu_t *tl_menu_ptr = BS_CONTAINER_OF(
+        listener_ptr, wlmaker_tl_menu_t, window_state_changed_listener);
+    wlmtk_window_t *window_ptr = data_ptr;
+
+    wlmtk_menu_item_set_enabled(
+        wlmaker_action_item_menu_item(tl_menu_ptr->shade_ai_ptr),
+        !wlmtk_window_is_shaded(window_ptr));
+    wlmtk_menu_item_set_enabled(
+        wlmaker_action_item_menu_item(tl_menu_ptr->unshade_ai_ptr),
+        wlmtk_window_is_shaded(window_ptr));
+
+    wlmtk_menu_item_set_enabled(
+        wlmaker_action_item_menu_item(tl_menu_ptr->fullscreen_ai_ptr),
+        !wlmtk_window_is_fullscreen(window_ptr));
+
+    wlmtk_menu_item_set_enabled(
+        wlmaker_action_item_menu_item(tl_menu_ptr->maximize_ai_ptr),
+        !wlmtk_window_is_maximized(window_ptr));
+    wlmtk_menu_item_set_enabled(
+        wlmaker_action_item_menu_item(tl_menu_ptr->unmaximize_ai_ptr),
+        wlmtk_window_is_maximized(window_ptr));
+}
+
 /* == End of tl_menu.c ===================================================== */

src/toolkit/window.h

@@ -48,6 +48,8 @@ typedef struct {
      * - @ref wlmtk_window_is_maximized
      * - @ref wlmtk_window_is_fullscreen
      * - @ref wlmtk_window_is_shaded
+     *
+     * data_ptr points to the window state (@ref wlmtk_window_t).
      */
     struct wl_signal          state_changed;
 } wlmtk_window_events_t;