FFT block - change window type on runtime

[Šerých Jakub]

Hi there!
I'm pretty new to gnu radio and this is my first time posting to this mailing 
list, so excuse me if my question is nonsensical.

I am trying to switch the window type in FFT block during runtime. I added QT 
GUI chooser with window.blackmanharris() etc. options, called it win and I put 
the variable name win to the Window parameter of FFT block. On start, it works 
perfectly (if I change default value of the chooser and start the flowchart) 
but nothing happens if I change value of chooser during runtime. It seems to 
me, that FFT initialises window type only on startup and doesn't look at it 
during runtime.
Is there any way how to do it? 

Thanks for any help

Jakub 

GRC 3.10.4.0 (Python 3.10.12) on DragonOS