Returning spell cast time, but not mana value

[molten moat]

I have a WeakAura that displays cast time whenever I am casting. I am currently using %p as the datatext.

I want the WeakAura to be loaded whenever my mana is below 100%. However, %p now tracks my mana whenever I'm not casting, which I do not want.

Is there a way to disable this, or to create a custom function that will only show cast time, but not the mana value?

[trim belfry]

on the triggers page, instaed of "dynamic information from the first active trigger" put dynamic information from the cast trigger only

[gilded epoch]

Flip the triggers.

Or ignore what I said and use a custom activation of function(t) return t[1] end