[Introduction] Qt 6 Programming Part 2

Qt Programming
One framework, one codebase, any platform.

What is Qt?

Qt is an application framework, and SW developed using Qt is compatible ( supported ) with MS Windows, MacOS, Android, iOS, Embedded Linux, QNX , etc. Therefore, there is no need to develop separate applications compatible with each operating system . And Qt isn't just a development framework for GUIs . It offers a vast array of APIs that address the needs of a wide range of industries .

SW developed with Qt can be ported to each operating system . For example, to develop an app for Android , you need to use JAVA , Android SDK, and NDK , but if you develop using C++ , which Qt uses, you can develop an app that runs on Android .

Applications developed with Qt can be ported to desktop operating systems , mobile operating systems, and embedded operating systems . Therefore, it is a development framework that can minimize labor costs and time required for development, and it uses C++ . The development framework even includes tools that support multiple languages and development tools that can create installation distributions ( installation files ) .

What can you do with Qt?

Qt can be used to develop software in a variety of industries . Tens of thousands of leading automotive OEMs use Qt . And countless other fields, including TVs, home appliances , and construction, are developing software using Qt .

It is possible to port SW developed with Qt to operating systems that operate at the MCU level, such as the FreeRTOS operating system, which is a real-time OS.

Qt, how do I use it?

Qt provides the Qt Creator IDE tool as a development IDE tool . However, for developers familiar with the Visual Studio IDE tool, you can install the Qt Visual Studio Add-in to develop SW using Qt in the Visual Studio IDE tool .

Learn things like this

Developing with Qt minimizes time and cost by being compatible with various operating systems, and through this training course, you can learn how to develop SW using Qt .

Therefore, by taking this course, you can improve your ability to develop SW in various industrial fields and acquire Qt intermediate or higher level skills .

• Learning the vast API provided by Qt
• How to develop application software that works the same way on multiple platforms
• Learn how to use the tools provided by Qt

I recommend this to these people

• Those who need to develop SW compatible with various platforms
• Those who want to develop SW required in various industrial fields using Qt

Lecture Structure 📖

Section 1. 2D Graphics Using the QPainter Class
The QPainter class can draw 2D graphic elements on a QWidget. For example, you can display shapes, lines, text, and images on a widget. In this section, you'll learn how to use QPainter to display 2D graphic elements on a QWidget.

Section 2. QPainter in Practice: Implementing Chroma Key Image Processing
Chromakey is the process of changing the background color by setting it to a specific color. Learn more about QPainter by implementing a method that replaces the green background in an image read in with another image.

Section 3. Implementing a Timer
Qt provides the QTimer class to call a specific function at a specified interval. In this section, you'll learn how to use QTimer.

Section 4. Thread Programming
Qt provides useful thread-related classes to simplify thread implementation. It also provides methods for implementing reentrancy-compliant threads. Therefore, in this section, we'll learn how to implement threads. Furthermore, we'll learn how to implement reentrancy-compliant threads in a multithreaded environment.

Section 5. Custom Widget
If you can't build a GUI using the widgets provided by Qt, you'll need to create your own. In this case, you'll learn how to create custom widgets. You'll also learn how to implement non-rectangular window shapes.

Section 6. Database Programming
Qt provides an API for accessing databases. For example, the database API provided by Qt allows you to use a common Qt database API regardless of the database you use.
For example, instead of using the client APIs provided by each database, such as MySQL, MS-SQL, Oracle, and SQLite, you can use the database API provided by Qt to handle databases such as MySQL, MS-SQL, Oracle, and SQLite in common. Therefore, in this section, you will learn how to use the database API provided by Qt.

Section 7. XML
Qt provides modules for easy XML handling. Using the XML module provided by Qt, you can easily handle XML data using SAX and DOM methods. In this section, you'll learn how to handle XML.

Section 8. JSON
Qt provides a JSON module that allows you to easily handle JSON (JavaScript Object Notation). In this section, you'll learn how to easily handle JSON format using the JSON module provided by Qt.

Section 9. Developing Applications That Support Multilingualism
Qt provides an easy way to develop multilingual applications. In this section, you'll learn how to create multilingual applications using the multilingual tools provided by Qt.

Section 10. Libraries
Learn how to use external libraries in your Qt-based applications. You'll also learn how to create libraries with Qt.

Section 11. D-Pointer
For effective source code management following version upgrades, C and C++ use opaque pointers or opaque types. Qt has improved opaque pointers to make them more efficient, using D-Pointers. This section will teach you how to use D-Pointers.

Section 12. Android Mobile App Development Using Qt
Qt supports a variety of platforms. In this section, you'll learn how to build an app for the Android platform using C++ and Qt.

Section 13. Network Programming
To make it easier to implement TCP/IP network-based applications, Qt provides the Qt Network module. In this section, you'll learn how to use the Qt Network module to implement TCP and UDP protocol-based applications.

Section 14. Creating an installation distribution for distributing the developed SW.
Qt provides a tool called the Qt Install Framework, which allows you to easily create installers for MS Windows, Linux, and macOS platforms. In this section, you'll learn how to create installers using the Qt Install Framework.