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Posted: **Fri Jan 09, 2015 4:08 am**

I've worked with a GUI type deal, and wanted to reinvent some basic concept objects like sliders and text boxes and the like. Though I stopped and dropped it when I couldn't figure out the algorithm for when the printf wraps a word down and how many pixels it wraps vertically for a text box type thing (It was for a text box that has text that is longer than the box, so the excess gets cut off by stencils and the y offset of the text would be controlled by a slider).

tl;dr:
Anyone know how to get the amount of pixels vertically that printf uses when wrapping?

Posted: **Fri Jan 09, 2015 4:13 am**

Okey first the short explanation: read [wiki]Font[/wiki] there are all the methods you need.

Long explanation:

You can use the function [wiki]Font:getWrap[/wiki]("your text",limit) to get how many lines long the text is gonna be:

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local text,limit = "This is the text passed to the function",100 --This is the width of the control
local font = love.graphics.getFont()
local rw,lines = font:getWrap(text,limit)

Then you can get the height of a line, there are three different things here, there is the height you can get with [wiki]Font:getHeight[/wiki] which is the one you pass to [wiki]love.graphics.newFont[/wiki], but this is not the real height, the real height can be calculated with [wiki]Font:getAscent[/wiki] and [wiki]Font:getDescent[/wiki], if you sum them up you get the complete height of the font. Then there is also [wiki]Font:getLineHeight[/wiki], this is the data that will tell you if there is spacing between two lines of text, but this is not measured in pixels, so you need to multiply it with the REAL height of the font:

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lineheight = font:getLineHeight() * (Font:getAscent() + Font:getDescent())

This is the total height of a line of text, if you want to know the spacing just get the difference:

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spacing = lineheight - (Font:getAscent() + Font:getDescent())

If you then multiply the lineheight by the number of lines you get the height!!

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height = lines * lineheight

Also you can use "rw" which is that other variable you can get from Font:getWrap, that is the real width, since your text may not cover the whole width of the element, you can use this to shrink your control automatically

NOTE: Remember to always leave some padding so that it looks right

Posted: **Fri Jan 09, 2015 4:19 am**

Don't waste your typing finger's man haha. I got it now, the font:getWrap, my bad. Thanks! +1

Posted: **Fri Jan 09, 2015 7:52 pm**

Haha I thought you would notice on you own! I wrote it anyway, for anyone having this issue... I recommend you read it anyway, since I put the method to get the height of a line in there too

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Algorithm for printf wrap amount?

Algorithm for printf wrap amount?

Re: Algorithm for printf wrap amount?

Re: Algorithm for printf wrap amount?

Re: Algorithm for printf wrap amount?