Digging deeper

In writing this chapter, I glossed over a few things for the sake of keeping the flow of the lesson. Now is a good time to look at some of them in more depth.

In particular, I want to take a little bit of time to explain the code for the push button, what these slots and signals are, and to pontificate on testing.

Explaining the push button code

The on_pushButton_clicked() handles the user clicking on pushbutton. Now, we will go through the method line by line to understand what is happening:

void MainWindow::on_pushButton_clicked()
{

The naming of this method enables the Qt GUI to automatically connect the signal emitted by the button when it is pressed to a slot in our main window that will handle it. The...