Dynamic variables in C++ OOT for Gnu Radio 3.10

Hello everyone,

In Gnu Radio 3.10, how to set a variable in a C++ OOT block that can be adjusted dynamically by a QT GUI range?

I did in a .h file:

  Private:

    float _param;

  Public:

    void set_param(float param) {_param = param;}

and in the impl.cc file:

  _param = param;

anywhere else I need to change? I just tried before in Gnu Radio 3.7, and now I am very lost with the new version.

Thank you very much.

Regards,

Wei