UI Hello World

src/dawn/scene/components/ui/UICanvas.hpp

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+// Copyright (c) 2022 Dominic Masters
+// 
+// This software is released under the MIT License.
+// https://opensource.org/licenses/MIT
+
+#pragma once
+#include "scene/SceneItemComponent.hpp"
+
+namespace Dawn {
+  enum UIDrawType {
+    UI_DRAW_TYPE_WORLD_ABSOLUTE,
+    UI_DRAW_TYPE_WORLD_CAMERA_RELATIVE,
+    UI_DRAW_TYPE_CAMERA_OVERLAY
+  };
+
+  class UIComponent;
+
+  class UICanvas : public SceneItemComponent {
+    public:
+      static std::shared_ptr<UICanvas> createCanvas(
+        std::shared_ptr<Scene> scene
+      );
+
+      //
+      std::vector<std::shared_ptr<UIComponent>> children;
+      UIDrawType drawType = UI_DRAW_TYPE_WORLD_CAMERA_RELATIVE;
+
+      UICanvas(SceneItem &item);
+
+      template<class T>
+      std::shared_ptr<T> addElement() {
+        auto item = std::make_shared<T>(*this);
+        this->children.push_back(item);
+        return item;
+      }
+
+      float_t getWidth();
+      float_t getHeight();
+
+      void start() override;
+  };
+}