how figure out the max # of characters in text box?

so.. what kind of method do people use to figure out the max number of characters that should fit in a text box?
seeing as different characters take different space ..

and, my text would be entered by myself, during development .. although the text is open to modders to make their own text in the boxes..

(i have my specific font in mind / is being used)

its a card game, i have text coming from xml

guess iam wondering, is there a standard way .. or an easy way to find out, does it tell you somehow?
just have to guess i suppose? lol

well could figure out the largest character of the font and see how many fit in the text ... but thats dumb since i could get away with more text than that..

dont really have alot of room on the card..

 

Could you not use http://docs.unity3d.com/ScriptReference/Font.GetCharacterInfo.html and go through the font character by character to see if it fits?

You should get the largest character using the function and then check how many of those fit.

Or am I getting the question wrong here?

 

I can't think of an easy way of doing it just from xml. You could have a testing scene specifically for testing potential xml entries. Within this test scene, you can have a text box with the Content Size Fitter component attached to it. You can test each desired xml entry by populating the textbox with the text, waiting one frame for the content size fitter to resize the textbox, then if the textbox is larger than it use to be you can return some kind of message saying that the xml text is too long.

http://docs.unity3d.com/ScriptReference/UI.ContentSizeFitter.html