Save calibration kit as json

Software/PC_Application/Util/qpointervariant.h

@@ -0,0 +1,29 @@
+#ifndef QPOINTERVARIANT_H
+#define QPOINTERVARIANT_H
+
+#include <QVariant>
+
+class QPointerVariant {
+public:
+    template <typename T> QPointerVariant(T *ptr)
+        : ptr(static_cast<void*>(ptr)),
+          variant(QVariant(*ptr)){};
+    void setValue(const QVariant &value) {
+        auto destType = variant.type();
+        if(!value.canConvert(destType)) {
+            throw std::runtime_error("Unable to convert QVariant to requested type");
+        }
+        variant = value;
+        variant.convert(destType);
+        QMetaType mt(destType);
+        mt.construct(ptr, variant.constData());
+    }
+    QVariant value() {
+        return QVariant(variant.type(), ptr);
+    }
+private:
+    void *ptr;
+    QVariant variant;
+};
+
+#endif // QPOINTERVARIANT_H