thanks@Marc_LM
If I think I can solve that, thinking about it, your idea gave me an idea hehe ,
that the button calls a function that updates the text with a buffer or the other.
I'm currently working with two buffers only I have to fix a small detail
and that is that the function that @GaetanGodart passed me is also affected by other keys pressed that are no
I can't avoid the execution of that part of the code because I don't know what the value of that
of code because I don't know what value has the variable “keyChar” when that key is pressed
(I guess that makes the problem I'm having).
what problem is it? well when I press delete or shift whatever I type then on the keyboard is not saved anywhere and if I delete it is deleted.
and if I delete it deletes one position less than the pressed ones.
I am not sure what is going on but the text that is typed with keyboard that does not use the gaetan function does not have that problem so my only assumption that the problem is that, that function is called by pressing any key but if you press shift or delete several times it is only executed once keyPressedhandler while the function corresponding to delete or change to lowercase / uppercase if it continues running as many times as you press the corresponding key regardless of whether it is pressed continuously or after another key.
but the buffer will be corrupted or something and does not save any extra key presses after that action.
