Question

I have a dialog in which setting are displayed. Also there is an help button on right top of the dialog.

After pressing this button and selecting any control on the dialog no help hints were shown.
How can I add these hints?

Answer 1

This is probably QWidget::setWhatsThis. You use this with the control which you want to explain (i.e. the one which the user clicks on after having clicked the ? button).

emailTextEdit->setWhatsThis(tr("The receipt will be sent to this e-mail address."));