Changing keyboard input into characters.

[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

[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.

[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 298 times

Best Regards,

[Mr. Strange]

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

[Kaze]

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

[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?

[Kaze]

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.

[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?

[rude]

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?

I didn't know that!

Will investigate and expose.

[u9_]

uh! investigate and expose. This sounds promising Personally, i couldn't get it to work myself, but maybe i was doing something wrong