[SOLVED] Detect Dialogue Window Visibility

[Sharp Glimpse]

Hello! This feels like a question everyone knows the answer to, but I'm still pretty new to Ren'Py and after hours of searching for a solution, I've finally decided to ask the question myself.

Basically, I want to make a button insensitive while a character is speaking (or while the dialogue window is visible). Then of course, when dialogue is completed, sensitivity should be restored. How would I go about coding this?

Thank you for any and all help!

[nananame]

the dialogue window is the say screen (you can find it in the screens script).
the command for checking whether a screen is currently shown is renpy.get_screen("screenname")

so do:
if renpy.get_screen("say"):
bla bla

[Sharp Glimpse]

-snip-

Exactly what I was searching for! Thank you so much; it works perfectly.