One very important aspect of creating a user-friendly application is the ability to display vital information regarding the status of the application when a certain event (intended or unintended) occurs. To display such information, we need an external window that can be dismissed by the user once he/she has acknowledged the information.
Qt comes with this functionality, and it's all residing in the QMessageBox class. There are several types of message box you can use in Qt; the most basic one uses just a single line of code, like so:
QMessageBox::information(this, "Alert", "Just to let you know, something happened!");
There are three parameters you need to provide for this function. The first one is the parent ...
