Problems with multiline EditBox widget in World of Warcraft AddOn

Question

When I try to set the width of a multiline EditBox widget, it flickers for a moment, then gets set.

Is there a way to get rid of the flickering? Or, alternatively, is there a workaround?

Answer 1

It might be a problem with the way the UI rendering is optimized. Try changing your UIFaster setting as described here: http://www.wowwiki.com/CVar%5FUIFaster

Answer 2

I've usually seen this as a result of multiple calls to :SetWidth() occurring in quick succession. There are two ways this can happen — (a) it's genuinely getting called multiple times, or (b) it's been hooked/replaced with another function which is internally causing multiple calls. As a quick test, try running the following command (or equivalent) via the WoW chat window while your edit box is visible:

/script MyEditBox:SetWidth(100)

If the size changes without flicker, you've got scenario A — go over your addon's logic paths and make sure :SetWidth() is only being called when appropriate (and only once). If it does flicker, you're probably looking at screnario B (or, of course, the UI issue Cogwheel mentions). This may be harder to debug, unless you're hooking/replacing SetWidth yourself, but a good first step would be to disable all other addons and see if the problem resolves itself. If not, my first guess would be a library issue (assuming you're using any).