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

Running a Qt application on Linux

Building and running a Qt application on Linux is similar to running it on Windows, but Linux has many distributions and thus it is difficult to build an application that flawlessly runs on all Linux variants. In most distributions, the application will run smoothly. We will focus on Ubuntu 20.04 as our target platform. When you install Qt on Ubuntu, it will automatically detect the kit and configurations automatically. You can also configure a kit with the appropriate compiler and Qt version, as illustrated in the following screenshot:

Figure 5.4 – Desktop kit configuration on Ubuntu

Let's run our HelloWorld example on Ubuntu. Hit the Run button on the left-side pane. A UI showing Hello World! will appear in no time, as illustrated in the following screenshot:

Figure 5.5 – Application running on Ubuntu

You can also run the application from the command line, as shown in the following...