Add an elements IDs class to allow for a way to determine what an object is.

Platformio/OmoteUI/core/UIElement.cpp

@@ -1,7 +1,7 @@
 #include "UIElement.hpp"
 
 namespace UI {
-UIElement::UIElement(lv_obj_t *aLvglSelf, uint16_t aId)
+UIElement::UIElement(lv_obj_t *aLvglSelf, ID aId)
     : mLvglSelf(aLvglSelf), mId(aId) {
   mLvglSelf->user_data = this;
 }

Platformio/OmoteUI/core/UIElement.hpp

@@ -1,5 +1,6 @@
 #pragma once
 
+#include "UIElementIds.hpp"
 #include "lvgl.h"
 
 namespace UI {
@@ -7,10 +8,10 @@ namespace UI {
 class UIElement {
 
 public:
-  UIElement(lv_obj_t *aLvglSelf, uint16_t aId = 0);
+  UIElement(lv_obj_t *aLvglSelf, const ID aId = ID());
 
 protected:
   lv_obj_t *mLvglSelf;
-  uint16_t mId;
+  const ID mId;
 };
 } // namespace UI

Platformio/OmoteUI/core/UIElementIds.hpp

@@ -0,0 +1,27 @@
+#pragma once
+
+namespace UI {
+
+class ID {
+public:
+  static constexpr auto INVALID = 0;
+
+  enum class Screens {
+    Home = static_cast<int>(INVALID) + 1,
+    INVALID_SCREEN_ID
+  };
+
+  enum class Widgets {
+    Slider = static_cast<int>(Screens::INVALID_SCREEN_ID) + 1,
+    INVALID_WIDGET_ID
+  };
+
+  ID() : mId(INVALID){};
+  ID(ID::Screens aScreenId) : mId(static_cast<int>(aScreenId)){};
+  ID(ID::Widgets aWidgetId) : mId(static_cast<int>(aWidgetId)){};
+
+private:
+  const int mId;
+};
+
+} // namespace UI

Platformio/OmoteUI/core/screen/HomeScreen.cpp

@@ -0,0 +1,5 @@
+#include "HomeScreen.hpp"
+
+using namespace UI::Screen;
+
+HomeScreen::HomeScreen() : Base(UI::ID::Screens::Home) {}

Platformio/OmoteUI/core/screen/HomeScreen.hpp

@@ -0,0 +1,10 @@
+#pragma once
+#include "ScreenBase.hpp"
+
+namespace UI::Screen {
+
+class HomeScreen : public Base {
+  HomeScreen();
+};
+
+} // namespace UI::Screen

Platformio/OmoteUI/core/screen/ScreenBase.cpp

@@ -2,8 +2,7 @@
 
 using namespace UI::Screen;
 
-Base::Base(uint16_t aId)
-    : UIElement(mScreen, aId), mScreen(lv_obj_create(NULL)) {}
+Base::Base(ID aId) : UIElement(mScreen, aId), mScreen(lv_obj_create(NULL)) {}
 
 void Base::AddWidget(Widget::Base::Ptr aWidget) {
   mWidgets.push_back(std::move(aWidget));

Platformio/OmoteUI/core/screen/ScreenBase.hpp

@@ -12,7 +12,7 @@ class Base : UIElement {
 public:
   typedef std::unique_ptr<Base> Ptr;
 
-  Base(uint16_t aId = 0);
+  Base(ID aId);
 
   void AddWidget(Widget::Base::Ptr aWidget);