combine with desktop project

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

components/justus/include/common/Widget.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <cstdint>
+
+#include "u8g2.h"
+
+class Widget {
+public:
+    explicit Widget(u8g2_t* u8g2);
+
+    virtual ~Widget() = default;
+
+    virtual void update(uint64_t dt);
+
+    virtual void render();
+
+    virtual void onButtonClicked(uint8_t button);
+
+protected:
+    u8g2_t* u8g2;
+};