TextField:getPointFromTextPosition

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Available since: Gideros 2019.5
Class: TextField

Description

Returns the coordinates from a given offset within the text.

(number),(number) = TextField:getPointFromTextPosition(offset)

Parameters

offset: (string) The byte offset into the text string.

Return values

Returns (number) The X coordinate.
Returns (number) The Y coordinate.

Example

Draws a red underline under the 'is' word:

local font = TTFont.new("fonts/Tahoma.ttf", 32, "", true, 1)
local text = TextField.new(font, "This is a text")
text:setPosition(100, 100)
local isS, isE = string.find(text:getText(), " is ") --Get 'is' word position
local isSX, isSY = text:getPointFromTextPosition(isS) --Get 'i' starting point
local isEX, isEY = text:getPointFromTextPosition(isE - 1) -- Get 's' end point
-- Draw a red underline under the 'is' word
local underline = Pixel.new(0xFF0000, 1, isEX - isSX, 3)
underline:setPosition(100 + isSX, 100 + 2)
stage:addChild(text)
stage:addChild(underline)