Form field: re-implemented enable/disable

radio/src/thirdparty/libopenui/src/form.cpp

@@ -48,6 +48,20 @@ void FormField::setEditMode(bool newEditMode)
   invalidate();
 }
 
+void FormField::enable(bool value)
+{
+  if (value) {
+    lv_obj_clear_state(lvobj, LV_STATE_DISABLED);
+  } else {
+    lv_obj_add_state(lvobj, LV_STATE_DISABLED);
+  }
+}
+
+bool FormField::isEnabled() const
+{
+  return !lv_obj_has_state(lvobj, LV_STATE_DISABLED);
+}
+
 void FormField::onClicked()
 {
   lv_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act());

radio/src/thirdparty/libopenui/src/form.h

@@ -52,14 +52,8 @@ class FormField : public Window
   inline bool isEditMode() const { return editMode; }
   virtual void setEditMode(bool newEditMode);
 
-  // TODO: replace with LVGL flags
-  void enable(bool value = true)
-  {
-    enabled = value;
-    invalidate();
-  }
-
-  bool isEnabled() const { return enabled; }
+  bool isEnabled() const;
+  void enable(bool value = true);
   void disable() { enable(false); }
 
   void onFocusLost() override