16 replies to this topic

[roosterhat]

i want it to capture the char mainly but i also want to capture the enter and backspace keys too

[Lyqyd]

Split into new topic.

[theoriginalbit]

It goes a little something like this:

while true do
  local event, param1 = os.pullEvent()
  if event == "key" then
    -- key was pressed
  elseif event == "char" then
    -- key with a char was pressed
  end
end

[roosterhat]

it prints both though

[roosterhat]

im trying to make a text box thats has edges and i need to use char over io.read() and i need to be able to capture enter and delete

[theoriginalbit]

roosterhat, on 19 February 2013 - 04:58 PM, said:

it prints both though

Not if you do it write. Post the code you have done.

function read() do
  local input = ""
  while true do
	local event, p = os.pullEvent()
	if event == "char" then
	  input = input..p
	elseif event == "key" then
	  if p == keys.enter then
		return input
	  elseif p == keys.backspace then
		input = input:sub(1, #input - 1)
	  end
	end
  end
  error( "should never get here" )
end

Edited by TheOriginalBIT, 19 February 2013 - 05:03 PM.

[theoriginalbit]

- oops thought i hit edit -

Edited by TheOriginalBIT, 19 February 2013 - 05:03 PM.

[roosterhat]

i could do

keys = {}
while true do
  keys[1]=""
  keys[2]=""
  local event, param1 = os.pullEvent()
  if event == "key" then
    key[1] = param1
  elseif event == "char" then
    key[2] = param2
  end
end

roosterhat, on 19 February 2013 - 05:06 PM, said:

i could do

keys = {}
while true do
  keys[1]=""
  keys[2]=""
  local event, param1 = os.pullEvent()
  if event == "key" then
	key[1] = param1
  elseif event == "char" then
	key[2] = param2
  end
end

no that prints the key ID then two spaces followed by the Char

[theoriginalbit]

roosterhat, on 19 February 2013 - 05:07 PM, said:

no that prints the key ID then two spaces followed by the Char

I don't even see how it does that. you have no print in there. Id suggest using a modification of the code I posted above.

[roosterhat]

ok thanks that works

[theoriginalbit]

no problems

[roosterhat]

ill just have to modify your coded so that it prints out the key every time instead of after the enter

[theoriginalbit]

roosterhat, on 19 February 2013 - 05:15 PM, said:

ill just have to modify your coded so that it prints out the key every time instead of after the enter

For that you would do

function read() do
  local input = ""
  local cx,cy = term.getCursorPos()
  while true do
	local event, p = os.pullEvent()
	if event == "char" then
	  input = input..p
	elseif event == "key" then
	  if p == keys.enter then
		return input
	  elseif p == keys.backspace then
		input = input:sub(1, #input - 1)
	  end
	end
	term.setCursorPos(cx,cy)
	write(input.." ")
  end
  error( "should never get here" )
end

then you use it just the same as normal read.

write("Your name: ")
local name = read()

could even add a password mask just like the real read. would call it like this:

write("Your pass: ")
local pass = read("*")

and in the read code you would do this

function read( mask )
  -- .... other code here

  term.setCursorPos(cx,cy)
  write( ( mask and string.rep(mask, #input) or input ).." ")
end

Edited by TheOriginalBIT, 19 February 2013 - 05:21 PM.

[roosterhat]

i debated using the read but i want the text to stop at the end of a text box for the login and for the chat box and i dont know of a way to abort read with the enter key

[roosterhat]

oh and the the backspace is not working for me

[roosterhat]

oh never mind i fixed it
missing the #

[roosterhat]

thanks so much now i can move on to more important things in my program