Re: Dynamic variables in C++ OOT for Gnu Radio 3.10

Hello!

Glad to hear you got it to work :)

Best regards,
Marcus

On 4/24/25 4:26 PM, Huang Wei wrote:
> Hello Marcus,
>
> I have made it work, by checking some of your answers before. Here are the steps, in case
> someone else is interested:
>
> 1. define the set_param() function in lib/myblock_imp.h file:
>      Public:
>          ...
>          void set_param(float param) {_param = param;}
> 2. Add in the lib/myblock_imp.cc file:
>      _param = param;
> 3. In include/gnuradio/customModule/myblock.h add:
> Public:
>          ...
>          virtual void set_param(float param) = 0;
> 4. run "md5sum include/gnuradio/customModule/myblock.h" to get the tag value.
> 5. copy and paste the tag value in "BINDTOOL_HEADER_FILE_HASH(xxxx)" in the file python/
> customModule/bindings/myblock_python.cc
> 6. then do cmake../, make, sudo make install and sudo ldconfig. It should work now.
> 7. I also did "gr_modtool bind myblock", but I'm not sure if it helped or not.
>
> Best regards,
> Wei
>
> On Thu, 24 Apr 2025 at 11:42, Marcus Müller <mmueller@gnuradio.org
> <mailto:mmueller@gnuradio.org>> wrote:
>
> Hi Huang Wei,
>
> nice to have you here!
>
> Can you show us where you use `_param` in your C++ implementation?
> What you show us looks right, in general.
>
> Best regards,
> Marcus
>
> On 4/22/25 4:56 PM, Huang Wei wrote:
> > And I have added in the .yml file:
> > callbacks:
> > - set_param(${param})
> >
> > But still the value can't be changed.
> >
> > On Tue, 22 Apr 2025 at 15:16, Huang Wei <weizardry@gmail.com
> <mailto:weizardry@gmail.com> <mailto:weizardry@gmail.com <mailto:weizardry@gmail.com>>>
> > wrote:
> >
> >     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
> >
> >
>
>