Could I hide the little arrow on the top of the cursor in arabic typing mode?

[karentako]

As title,
I am using virtual keyboard and qtextedit, and I'm trying to hide the little arrow on the top of cursor when using arabic typing mode.

I tried to use setCursorWidth(0) for my qtextedit, but it doesn't work. The cursror width turned to 0 but the small arrow is still there. Is there any function or any way to hide that little arrow? thanks!