checkbox: add update() method (#62)

radio/src/thirdparty/libopenui/src/checkbox.cpp

@@ -45,12 +45,19 @@ CheckBox::CheckBox(Window* parent, const rect_t& rect,
   lv_obj_set_style_bg_color(lvobj, makeLvColor(COLOR_THEME_DISABLED), LV_PART_MAIN);
   lv_obj_set_style_bg_color(lvobj, makeLvColor(COLOR_THEME_DISABLED), LV_STATE_FOCUSED);
 
-  if (_getValue && _getValue()) lv_obj_add_state(lvobj, LV_STATE_CHECKED);
+  update();
 
   lv_obj_add_event_cb(lvobj, checkbox_event_handler,
                       LV_EVENT_VALUE_CHANGED, this);
 }
 
+void CheckBox::update() const
+{
+  if (!_getValue) return;
+  if (_getValue()) lv_obj_add_state(lvobj, LV_STATE_CHECKED);
+  else lv_obj_clear_state(lvobj, LV_STATE_CHECKED);
+}
+
 void CheckBox::onClicked()
 {
   // prevent FormField::onClicked()

radio/src/thirdparty/libopenui/src/checkbox.h

@@ -51,6 +51,8 @@ class CheckBox : public FormField
     _getValue = std::move(handler);
   }
 
+  void update() const;
+  
  protected:
   std::string label;
   std::function<uint8_t()> _getValue;