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Changing keyboard input into characters.
Posted: Wed Nov 26, 2008 7:53 am
by Mr. Strange
It's probably late, but for some reason I'm unable to grab the key pressed as a character, rather than a character code. For example:
function keypressed(key)
string = string..key
end
function draw()
love.graphics.print(string, 100,100)
end
Just gives me "112" when I press "p". I hope I'm missing something obvious.
--Mr. Strange
Re: Changing keyboard input into characters.
Posted: Wed Nov 26, 2008 10:43 am
by rude
The value passed to keypressed is a virtual key code (i.e. an integer). Appending it to a string will not convert it into the correct character. The function
string.char will, however.
Re: Changing keyboard input into characters.
Posted: Wed Nov 26, 2008 12:39 pm
by TsT
I have made a small lib that remap (copy) the love input constants to allow to work easilly with them.
I'm using it like that :
Code: Select all
love.filesystem.require("lib/love.const.lua")
function keypressed( key )
print(string.format("key %s pressed (code %d)", loveKeycodeToKeyname(key, "key"), key))
end
- love.const.zip
- (r292) v0.1.0 20081025
- (13.16 KiB) Downloaded 270 times
Best Regards,
Re: Changing keyboard input into characters.
Posted: Wed Nov 26, 2008 4:52 pm
by Mr. Strange
rude wrote:The value passed to keypressed is a virtual key code (i.e. an integer). Appending it to a string will not convert it into the correct character. The function
string.char will, however.
Awesome. That gets me most of the way there.
Unfortunately, I can't simply call string.char(key) on everything, because some valid keys (Ctrl, Shift) don't have characters associated with them, which causes an exception. What's the cleanest way to filter out the non-character keys?
--Mr. Strange
Re: Changing keyboard input into characters.
Posted: Wed Nov 26, 2008 5:25 pm
by Kaze
Mr. Strange wrote:rude wrote:The value passed to keypressed is a virtual key code (i.e. an integer). Appending it to a string will not convert it into the correct character. The function
string.char will, however.
Awesome. That gets me most of the way there.
Unfortunately, I can't simply call string.char(key) on everything, because some valid keys (Ctrl, Shift) don't have characters associated with them, which causes an exception. What's the cleanest way to filter out the non-character keys?
--Mr. Strange
Code: Select all
if ( Key >= 33 and Key <= 122 ) then
local char = string.char( Key )
if ( love.keyboard.isDown( love.key_lshift ) or love.keyboard.isDown( love.key_rshift ) ) then
char = string.upper( char )
end
end
Re: Changing keyboard input into characters.
Posted: Fri Nov 28, 2008 4:45 am
by Lord Tim
What about stuff like parenthesis? I mean you could go through and do an if statement for each key, but surely it's not that bad, is it?
Re: Changing keyboard input into characters.
Posted: Fri Nov 28, 2008 3:38 pm
by Kaze
Lord Tim wrote:What about stuff like parenthesis? I mean you could go through and do an if statement for each key, but surely it's not that bad, is it?
It is.
Re: Changing keyboard input into characters.
Posted: Sat Nov 29, 2008 1:59 pm
by muku
Translating key codes into characters directly is a bad idea because it doesn't take the user's keyboard layout into account; international users are out of luck, for example. SDL
actually provides automatic translation of key hits into Unicode characters, but I guess Löve doesn't expose that functionality?
Re: Changing keyboard input into characters.
Posted: Sat Nov 29, 2008 3:07 pm
by rude
I didn't know that!
Will investigate and expose.
Re: Changing keyboard input into characters.
Posted: Sat Nov 29, 2008 6:34 pm
by u9_
uh! investigate and expose. This sounds promising
Personally, i couldn't get it to work myself, but maybe i was doing something wrong
