Touchgfx print unicode problem

[Maximiliano]

Good morning to all,

I am wanting to make a simple numeric keypad where I only press numbers and they are seen in a text area and then when I press a button it compares it with a char and if it is the same it does one thing or another.

My problem is that I can't see anything in the text area and if I send in the sprintf directly the variable contrasena_ing (which is of type char contrasena_ing[11]; ) it prints and the delete button erases but in fact it prints anything (from touch gfx the range of ascii characters is ok).

what am I doing wrong?

Info_5View::Info_5View()
{

}

void Info_5View::setupScreen()
{
    Info_5ViewBase::setupScreen();

    contrasena_ing[0] = '\0';
    pos = 0;
}

void Info_5View::tearDownScreen()
{
    Info_5ViewBase::tearDownScreen();
}


void Info_5View::service_unlock()
{
    // Override and implement this function in Info_5
	//Unicode::snprintf(unlock_textBuffer, UNLOCK_TEXT_SIZE, "%s",contrasena_ing);
	//unlock_text.invalidate();

	//char contrasena_ing[11];
}
void Info_5View::borrar_caracter()
{

	if(pos > 0)
	{
		pos--;
		contrasena_ing[pos] = '\0';

		Unicode::UnicodeChar buffer[11];

		Unicode::strncpy(buffer, contrasena_ing, 11);

		Unicode::snprintf(unlock_textBuffer, UNLOCK_TEXT_SIZE, "%s",buffer);
		unlock_text.invalidate();
	}
}
void Info_5View::boton_0()
{
	if(pos < 10)
	{
		pos++;
		contrasena_ing[pos] = '0';
		contrasena_ing[pos+1] = '\0';

		Unicode::UnicodeChar buffer[11];

		Unicode::strncpy(buffer, contrasena_ing, 11);

		Unicode::snprintf(unlock_textBuffer, UNLOCK_TEXT_SIZE, "%s",buffer);
		unlock_text.invalidate();
	}
}
void Info_5View::boton_1()
{
	if(pos < 10)
	{
		pos++;
		contrasena_ing[pos] = '1';
		contrasena_ing[pos+1] = '\0';

		Unicode::UnicodeChar buffer[11];

		Unicode::strncpy(buffer, contrasena_ing, 11);

		Unicode::snprintf(unlock_textBuffer, UNLOCK_TEXT_SIZE, "%s",buffer);
		unlock_text.invalidate();
	}
}

I share a part of the code where it is tested with the number 0 and 1 for the moment but it would be from 0 to 9.

I don't care that when changing the screen the entered value is not saved, that's why I don't send anything to the model.cpp.

[Marc_LM]

Max I recommend that you don't make custom buttons but use the keyboard widget.
It is harder at first but it will make thing simpler later.

Check Gaetan's T9 sample and the demo found in Designer.
Don't do my mistake, insert a buffer in the widget even if you don't want to show anything.

You will see things called callback.
Some of them for keys, others for callbackArea; you will be able to check the value of the callback to know what action to do.