Difference between revisions of "on.charIn"

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  function on.charIn(char)
 
  function on.charIn(char)
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     if string.len(input) >= 25 then  -- Here, we set a 25 chars limit
+
     input = input..char  -- appending
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        input = input..char  -- appending
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    platform.window:invalidate()  -- refreshing the screen
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        platform.window:invalidate()  -- refreshing the screen
 
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    end
 
 
  end
 
  end
  
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function on.backspaceKey()
 
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    input = string.usub(input,0,string.len(input)-1)  -- deleting the last char (with unicode support)
 
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    platform.window:invalidate()  -- refreshing the screen
 
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end
 
 
</syntaxhighlight>
 
</syntaxhighlight>
  
 
You can here find a more detailed tutorial on how to use it to create a text input function :
 
You can here find a more detailed tutorial on how to use it to create a text input function :
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http://www.inspired-lua.org/2011/12/how-to-have-a-nice-little-input-function-in-lua/
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http://inspired-lua.org/index.php/2011/12/how-to-have-a-nice-little-input-function-in-lua/
  
 
[[Category:Events]]
 
[[Category:Events]]

Latest revision as of 16:51, 17 December 2013

on.charIn is an event that catches the user's keypresses on the keyboard.

Here's an example on how to use it : 

 input = ""   -- the string that will contain the user's typed message

 function on.paint(gc)
     gc:drawString(input,5,5,"top")  -- drawing the current string on screen
 end

 function on.charIn(char)
     input = input..char   -- appending
     platform.window:invalidate()   -- refreshing the screen
 end

You can here find a more detailed tutorial on how to use it to create a text input function : http://inspired-lua.org/index.php/2011/12/how-to-have-a-nice-little-input-function-in-lua/

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