feat(color): enhancements and fixes for Lua LVGL API (#5558)

New:
line and triangle primitives
message popup dialog
expose buttons for for font, alignment, color, timer, switch and source pickers
generic popup dialog that can be filled with other things
lvgl.isAppMode() function to let widgets know when app mode is active
additional containers for creating layouts (box and setting)
flex layouts

Fixes:
colors are updated when theme changes
fix memory leaks when stand alone scripts close
run stand alone scripts in a separate Lua state and use lua_pcallk() to prevent cross boundary errors (color only)

radio/src/lua/lua_widget.h

@@ -40,16 +40,17 @@ class LuaLvglManager
   LuaLvglManager() = default;
 
   std::vector<int> getLvglObjectRefs() const { return lvglObjectRefs; }
-  void saveLvglObjectRef(int ref) { lvglObjectRefs.push_back(ref); }
+  void saveLvglObjectRef(int ref);
   void clearRefs(lua_State *L);
   bool callRefs(lua_State *L);
 
-  void setTempParent(Window *p) { tempParent = p; }
-  Window* getTempParent() const { return tempParent; }
+  void setTempParent(LvglWidgetObjectBase *p) { tempParent = p; }
+  LvglWidgetObjectBase* getTempParent() const { return tempParent; }
 
   virtual Window* getCurrentParent() const = 0;
   virtual void clear() = 0;
   virtual bool useLvglLayout() const = 0;
+  virtual bool isAppMode() const = 0;
 
   virtual void luaShowError() = 0;
 
@@ -59,7 +60,7 @@ class LuaLvglManager
 
  protected:
   std::vector<int> lvglObjectRefs;
-  Window* tempParent = nullptr;
+  LvglWidgetObjectBase* tempParent = nullptr;
 };
 
 class LuaEventHandler
@@ -92,25 +93,6 @@ class LuaWidget : public Widget, public LuaEventHandler, public LuaLvglManager
 {
   friend class LuaWidgetFactory;
 
-  int zoneRectDataRef;
-  int optionsDataRef;
-  char* errorMessage;
-  bool refreshed = false;
-
-  // Window interface
-  void onClicked() override;
-  void onCancel() override;
-  void checkEvents() override;
-
-  // Widget interface
-  void onFullscreen(bool enable) override;
-    
-  void setErrorMessage(const char* funcName);
-
-  // Update 'zone' data
-  void updateZoneRect(rect_t rect, bool updateUI = true) override;
-  bool updateTable(const char* idx, int val);
-
  public:
   LuaWidget(const WidgetFactory* factory, Window* parent, const rect_t& rect,
             WidgetPersistentData* persistentData, int luaWidgetDataRef, int zoneRectDataRef,
@@ -121,6 +103,8 @@ class LuaWidget : public Widget, public LuaEventHandler, public LuaLvglManager
   std::string getName() const override { return "LuaWidget"; }
 #endif
 
+  void setErrorMessage(const char* funcName);
+
   // Widget interface
   const char* getErrorMessage() const override;
   void update() override;
@@ -130,24 +114,41 @@ class LuaWidget : public Widget, public LuaEventHandler, public LuaLvglManager
 
   LuaWidgetFactory* luaFactory() const { return (LuaWidgetFactory*)factory; }
 
-  Window* getCurrentParent() const override { return tempParent ? tempParent : (Window*)this; }
+  Window* getCurrentParent() const override { return (tempParent && tempParent->getWindow()) ? tempParent->getWindow() : (Window*)this; }
 
   bool useLvglLayout() const override;
+  bool isAppMode() const override;
 
   void luaShowError() override {}
 
-  bool isWidget() override { return true; }
+  void pushOptionsTable();
+
+  bool isWidget() override { return !inSettings; }
 
  protected:
-  bool created = false;
+  bool inSettings = false;
   lv_obj_t* errorLabel = nullptr;
+  int zoneRectDataRef;
+  int optionsDataRef;
   int luaWidgetDataRef = 0;
+  char* errorMessage;
+  bool refreshed = false;
+
+  // Window interface
+  void onClicked() override;
+  void onCancel() override;
+  void checkEvents() override;
+  void onEvent(event_t event) override;
+
+  // Widget interface
+  void onFullscreen(bool enable) override;
+
+  // Update 'zone' data
+  void updateZoneRect(rect_t rect, bool updateUI = true) override;
+  bool updateTable(const char* idx, int val);
 
   // Calls LUA widget 'refresh' method
   void refresh(BitmapBuffer* dc);
 
-  // Window interface
-  void onEvent(event_t event) override;
-
   static void redraw_cb(lv_event_t *e);
 };