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

[Nigel Steed (XENINT)]

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