combine with desktop project

Signed-off-by: Peter Siegmund <developer@mars3142.org>

include/ui/widgets/Button.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include "../UIWidget.h"
+
+#include <functional>
+
+#define BUTTON_WIDTH (35)
+
+class Button final : public UIWidget {
+public:
+    Button(void* appState, float x, float y, float width, std::function<void()> callback);
+
+    void render() const override;
+
+private:
+    float m_x;
+    float m_y;
+    float m_width;
+    std::function<void()> m_callback;
+};