keycode <-> realcode <-> keycode

MoKaLux · September 2021

hope you are all doing fine

I would like to let the player choose the keys for playing, I have this:

How can I display the letter (here LEFT) instead of the constant 37?

Do I need to map myself all the keys? wouldn't that be problematic with different languages, pc or mac, ... ? Some code:

g_keyleft = KeyCode.LEFT
local textInputDialog = TextInputDialog.new("assign new key", "LEFT", g_keyleft, "Cancel", "OK")
local function onComplete(event)
	print(event.text, event.buttonIndex, event.buttonText)
end
textInputDialog:addEventListener(Event.COMPLETE, onComplete)
textInputDialog:show()

I will store each keys to variables (here g_keyleft)...
Thank you for your help

MoKaLux · September 2021

or even better:
1- the user presses the button to remap the left direction
2- button blinks (or changes color, ...)
3- user presses the new key
4- game uses the new key

MoKaLux · September 2021

-- key codes are integer. we map to strings so that we can display key name easily
local keyNames = {
  [KeyCode.BACK] = "back",
  [KeyCode.SEARCH] = "search",
  [KeyCode.MENU] = "menu",
  [KeyCode.CENTER] = "center",
  [KeyCode.SELECT] = "select",
  [KeyCode.START] = "start",
  [KeyCode.L1] = "L1",
  [KeyCode.R1] = "R1",
  [KeyCode.LEFT] = "left",
  [KeyCode.UP] = "up",
  [KeyCode.RIGHT] = "right",
  [KeyCode.DOWN] = "down",
  [KeyCode.X] = "x",
  [KeyCode.Y] = "y",
  [KeyCode.SPACE] = "space",
  [KeyCode.BACKSPACE] = "backspace",
  [KeyCode.SHIFT] = "shift",
}
 
local function onKeyDown(event)
  text1:setText("key down: "..(keyNames[event.keyCode] or "unknown"))
end

???

E1e5en · September 2021

I suppose you should write the input handler yourself without using the TextInputDialog, because it does not have an input processing event in the field (not described in the documentation).

You can use utf8.char() to convert a key code to a character. Example:

stage:addEventListener(Event.KEY_DOWN, function(event)
	print("KeyCode: ".. tostring(event.keyCode))
	print("Key:"..utf8.char(event.keyCode))
end)

For a "nice" display of the values of special characters (BackSpace, Space, Left, Right), your array is useful.

stage:addEventListener(Event.KEY_DOWN, function(event)
	if (keyNames[event.keyCode] or "unknown") ~= "unknown" then
		print("KeyCode: ".. tostring(event.keyCode))
		print("Key:"..keyNames[event.keyCode])
	else
		print("KeyCode: ".. tostring(event.keyCode))
		print("Key:"..utf8.char(event.keyCode))
	end
end)

MoKaLux · September 2021

perfect E1e5en

I also find this stage:addEventListener(Event.KEY_CHAR, onKeyChar) which is not documented

local textc = TextField.new(nil, "key chars: ")
textc:setScale(4)
textc:setPosition(10, 130)
stage:addChild(textc)
 
local function onKeyChar(event)
	textc:setText("key chars: "..event.text)
end
 
stage:addEventListener(Event.KEY_CHAR, onKeyChar)

EDIT: further reading on keycode https://forum.gideros.rocks/discussion/7593/no-keycode-sent-for-some-keys-when-shift-is-being-pressed

E1e5en · September 2021

An example might come in handy

By clicking on the mouse button, the editing mode is activated and you can drive in a key from the keyboard. There you can check which buttons can be assigned and which cannot.
Project: link

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