Question

I am writing an application with a submit button but I want to check if the textfield has been filled if not do not submit.

Not quite sure how the code should go.

My code currently looks like

if(flightNumber == NULL)
{
   flightNumbertext.text.color = 'red';
}

I am designing this for a Qt Quick application written in QML.

Answer 1

After a bit of playing, I think this will work for you

if (flightNumber.text.trim().length == 0) {
    flightNumbertext.text.color = 'red'; 
}

The function trim() is like QString::trimmed(). It removes both leading and trailing spaces from the string.