Re: [Discuss-gnuradio] Enable/Disable Processing on QT Tab Page Selection

[Nigel Steed (XENINT)]

Thanks Derek,

 

I never spotted the COPY block.

 

Kind regards,

 

Nigel

 

 

From: Derek Kozel [mailto:address@hidden
Sent: Tuesday, February 14, 2017 9:37 PM
To: Nigel Steed (XENINT) <address@hidden>
Cc: address@hidden
Subject: Re: [Discuss-gnuradio] Enable/Disable Processing on QT Tab Page Selection

 

Hello Nigel,

The Copy block is a useful block for enabling/disabling portions of flowgraphs. I think you will need a custom python module (which can be included in GRC) to do the tab detection. I think having the ability to register functions onto the currentChanged signal or similar would be a useful addition to the qtgui Tab Widget.

https://github.com/gnuradio/gnuradio/blob/master/gr-qtgui/grc/qtgui_tab_widget.xml

http://doc-snapshots.qt.io/4.8/qtabwidget.html#currentChanged

Regards,

Derek

 

On Tue, Feb 14, 2017 at 7:27 AM, Nigel Steed (XENINT) <address@hidden> wrote:

Hi All,

 

I have prepared a GRC Flowgraph with several tab pages using the QT Tab Widget. Each tab page has different displays such as spectrograms, waterfalls etc.

 

Behind these tab screens I have separate processing blocks running to generate the data to display, all in parallel.

 

I am wondering if there is a neat way to only enable processing blocks when the corresponding tab is active ?

 

My first attempt at this was to use a number of throttle blocks located in different signal paths associated for each tab, and dynamically set the sample rate to 0 when the tab is not active to disable data flow – but this module seems to cause the entire flowgraph to stop.

 

My next approach is to generate an OOT Module to enable/disable data flow unless anyone knows of a neater way ?

 

Is it possible to detect what tab is selected from within GRC ?

 

Any comments much appreciated.

 

Nigel

_______________________________________________
Discuss-gnuradio mailing list
address@hidden
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio