**Course Title:** Qt 6 Application Development with C++ **Section Title:** Introduction to Qt and C++ Setup **Topic:** Setting up the development environment and creating a simple 'Hello World' Qt application.(Lab topic) **Objective:** By the end of this topic, you will be able to set up the development environment for Qt 6 and create a simple 'Hello World' application. **Prerequisites:** * Understanding of C++ basics * Familiarity with Qt 6 features and its uses for desktop development * Basic structure of a Qt C++ application * Understanding of event-driven programming in Qt **Step 1: Setting up the Development Environment** To set up the development environment for Qt 6, follow these steps: 1. **Install Qt Creator:** Qt Creator is the official Integrated Development Environment (IDE) for Qt. Download and install the latest version of Qt Creator from the official Qt website: <https://www.qt.io/download> 2. **Install CMake:** CMake is a build system generator that allows you to create build systems for your Qt projects. Download and install the latest version of CMake from the official CMake website: <https://cmake.org/download/> 3. **Install a C++ Compiler:** Qt supports several C++ compilers, including GCC, Clang, and MSVC. Make sure you have a C++ compiler installed on your system. 4. **Configure Qt Creator:** After installing Qt Creator, open it and go to **Tools** > **Options** > **Kits**. Create a new kit or edit an existing one and select the Qt version, compiler, and debugger. **Step 2: Creating a New Project** To create a new Qt project, follow these steps: 1. **Open Qt Creator:** Open Qt Creator and click on **File** > **New File or Project**. 2. **Select the Project Template:** Select **Application** under **Non-Qt Project** and click **Choose**. 3. **Choose the Project Name and Location:** Enter a name for your project and select a location for your project. 4. **Select the Build System:** Select **CMakeList.txt** as the build system. **Step 3: Writing the Code** To create a simple 'Hello World' Qt application, you will need to write the following code: ```cpp #include <QApplication> #include <QVBoxLayout> #include <QLabel> int main(int argc, char* argv[]) { QApplication app(argc, argv); QWidget window; window.setWindowTitle("Hello World"); QVBoxLayout layout; QLabel label("Hello, World!"); layout.addWidget(&label); window.setLayout(&layout); window.show(); return app.exec(); } ``` This code creates a simple Qt application with a window and a label that displays "Hello, World!". **Step 4: Building and Running the Code** To build and run the code, follow these steps: 1. **Create a CMakeList.txt File:** Create a new file called `CMakeList.txt` in the project directory and add the following code: ```cmake cmake_minimum_required(VERSION 3.10) project(HelloWorld) set(CMAKE_CXX_STANDARD 14) find_package(Qt6 COMPONENTS Widgets) add_executable(${PROJECT_NAME} main.cpp) target_link_libraries(${PROJECT_NAME} Qt6::Widgets) ``` 2. **Build the Project:** Go to **Build** > **Build Project** or press **Ctrl+B**. 3. **Run the Project:** Go to **Build** > **Run** or press **F5**. **Conclusion:** In this topic, you learned how to set up the development environment for Qt 6 and create a simple 'Hello World' Qt application. You also learned how to write and build Qt code using CMake. **What to Expect in the Next Topic:** In the next topic, we will cover the basics of Qt widgets, including QPushButton, QLabel, QLineEdit, and more. **Leave a Comment:** If you have any questions or need help with this topic, feel free to ask in the comment section below. **Next Topic:** [Introduction to basic Qt widgets: QPushButton, QLabel, QLineEdit, etc.](Widgets, Layouts, and Events)