Initial commit, showing ui above target window

include/gui/Button.hpp

@@ -0,0 +1,16 @@
+#pragma once
+
+#include "Widget.hpp"
+#include <string>
+
+namespace gsr {
+    class Button : public Widget {
+    public:
+        Button(mgl::vec2f size);
+        void on_event(mgl::Event &event, mgl::Window &window) override;
+        void draw(mgl::Window &window) override;
+    private:
+        mgl::vec2f size;
+        bool mouse_inside = false;
+    };
+}

include/gui/Widget.hpp

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <mglpp/system/vec.hpp>
+
+namespace mgl {
+    class Event;
+    class Window;
+}
+
+namespace gsr {
+    class Widget {
+    public:
+        virtual ~Widget() = default;
+
+        virtual void on_event(mgl::Event &event, mgl::Window &window) = 0;
+        virtual void draw(mgl::Window &window) = 0;
+        virtual void set_position(mgl::vec2f position);
+    protected:
+        mgl::vec2f position;
+    };
+}