Creating a simple Qt Widgets application using the M/V pattern

It is time for us to create a simple example using Qt Widgets. The example in this section illustrates how a predefined QFileSystemModel is used in association with the built-in QListView and QTreeView widgets. Delegation is automatically taken care of when the Views are double-clicked.

Follow these steps to create a simple application that implements the M/V pattern:

1. Create a new project using Qt Creator, selecting the Qt Widgets template from the project creation wizard. It will generate a project with a predefined project skeleton.
2. Once the application skeleton is created, open the .ui form and add QListView and QTreeView to the form. You may add two labels to distinguish the Views as shown here:
   

   Figure 7.9 – Create a UI with QListView and QTreeView using Qt Designer

3. Open the mainwindow.cpp file and add the following contents:

   #include "mainwindow.h"
   #include "ui_mainwindow.h&quot...