gc:drawString

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drawString is a function that is part of gc (Graphics Context).

This function is used to display text, numbers etc. on the screen at specified coordinates.


Returns an integer corresponding to the width of the displayed string.


This has been introduced in TI-Nspire OS 3.0 (Changes).


Syntax[edit]

gc:drawString(string, x, y [,position])

Parameter Type Description
string
string The text to display
x
number the x coordinate of the beginning of the string. Relative to position.
y
number the y coordinate of the beginning of the string. Relative to position.
position
string the string’s anchor point (vertical alignment). It can either be "baseline", “bottom”, “middle”, or “top”. See screenshot below.

The position argument is optional, and defaults to "bottom" when not specified in apilevels < 2.3. For apilevels >= 2.3, the default is "top".

Example[edit]

function on.paint(gc)
     gc:drawString("Hello World", 0, 0, "top")
end

will display    Hello World     at the top-left part of the screen.


Good to know[edit]

In order to clear up what 'position' does, here's an animated image with the 4 possibilities, showing a text that is drawn at the same 60;60 coordinates, but with different "position" attributes.
drawString text position.gif