keyp

keyp

keyp([code, [hold period]]) -> pressed

Parameters

• code : the key code we want to check (1..65) (see codes here)
• hold : time in ticks before autorepeat
• period : time in ticks for autorepeat interval

Returns

• pressed : key is pressed (true/false)

Description

This function returns true if the given key is pressed but wasn't pressed in the previous frame. Refer to btnp for an explanation of the optional hold and period parameters.

Example

-- title:  text input example
-- author: nesbox

function gets()
	A="abcdefghijklmnopqrstuvwxyz0123456789-=[]\\;'`,./ "
	S="ABCDEFGHIJKLMNOPQRSTUVWXYZ)!@#$%^&*(_+{}|:\"~<>? "
	for i=0,3 do
		local c=peek(0xff88+i)
		if c>0 and c<=#A and keyp(c,20,3) then
			return key(64)and S:sub(c,c)or A:sub(c,c)
		end
	end
	return nil
end

input="Enter text:"

function TIC()
	c=gets()
	if c then input=input..c end
	cls()
	print(input)
end