Book Image

Cross-Platform Development with Qt 6 and Modern C++

By : Nibedit Dey
Book Image

Cross-Platform Development with Qt 6 and Modern C++

By: Nibedit Dey

Overview of this book

Qt is a cross-platform application development framework widely used for developing applications that can run on a wide range of hardware platforms with little to no change in the underlying codebase. If you have basic knowledge of C++ and want to build desktop or mobile applications with a modern graphical user interface (GUI), Qt is the right choice for you. Cross-Platform Development with Qt 6 and Modern C++ helps you understand why Qt is one of the favorite GUI frameworks adopted by industries worldwide, covering the essentials of programming GUI apps across a multitude of platforms using the standard C++17 and Qt 6 features. Starting with the fundamentals of the Qt framework, including the features offered by Qt Creator, this practical guide will show you how to create classic user interfaces using Qt Widgets and touch-friendly user interfaces using Qt Quick. As you advance, you'll explore the Qt Creator IDE for developing applications for multiple desktops as well as for embedded and mobile platforms. You will also learn advanced concepts about signals and slots. Finally, the book takes you through debugging and testing your app with Qt Creator IDE. By the end of this book, you'll be able to build cross-platform applications with a modern GUI along with the speed and power of native apps.
Table of Contents (17 chapters)
Section 1: The Basics
Section 2: Cross-Platform Development
Section 3: Advanced Programming, Debugging, and Deployment

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...