**Course Title:** QML Application Development **Section Title:** QML Basics: Components and Properties **Topic:** Introduction to QML components: Rectangle, Text, Image, etc. **Introduction:** In the previous topics, we covered the basics of QML, setting up the development environment, and understanding the QML engine. Now, it's time to dive into the world of QML components. In this topic, we will explore the fundamental components that you will use to build your QML applications. We will cover the basics of Rectangle, Text, Image, and other essential components. **1. Rectangle Component:** The Rectangle component is a basic component that represents a rectangular area in your QML application. It can be used as a background, a border, or even a button. Here's a basic example of how to use the Rectangle component: ```qml import QtQuick 2.15 Rectangle { width: 100 height: 50 color: "lightblue" } ``` In this example, we create a Rectangle component with a width of 100 units, height of 50 units, and a light blue color. You can adjust the properties of the Rectangle component, such as the border, radius, and gradient, to customize its appearance. **2. Text Component:** The Text component is used to display text in your QML application. It supports various font styles, sizes, and colors. Here's an example of how to use the Text component: ```qml import QtQuick 2.15 Text { text: "Hello, World!" font.pointSize: 24 color: "blue" } ``` In this example, we create a Text component with the text "Hello, World!", font size 24 points, and a blue color. You can adjust the properties of the Text component, such as the font family, style, and alignment, to customize its appearance. **3. Image Component:** The Image component is used to display images in your QML application. It supports various image formats, such as PNG, JPEG, and SVG. Here's an example of how to use the Image component: ```qml import QtQuick 2.15 Image { source: "qt-logo.png" width: 100 height: 100 } ``` In this example, we create an Image component with the source set to "qt-logo.png", width of 100 units, and height of 100 units. You can adjust the properties of the Image component, such as the scale, rotation, and opacity, to customize its appearance. **Other Components:** In addition to the Rectangle, Text, and Image components, there are many other components that you can use to build your QML applications. Some of these components include: * Button: a basic button component * CheckBox: a check box component * ComboBox: a combo box component * ListView: a list view component * GridView: a grid view component You can learn more about these components and how to use them in your QML applications by visiting the official Qt documentation: [https://doc.qt.io/qt-5/qml-types.html](https://doc.qt.io/qt-5/qml-types.html). **Conclusion:** In this topic, we covered the basics of QML components, including the Rectangle, Text, Image, and other essential components. We explored how to use these components to build basic QML applications and customize their appearance using various properties and styles. In the next topic, we will dive into the world of properties and signals, which are essential for building interactive and dynamic QML applications. **What's Next:** In the next topic, we will cover "Understanding properties and signals." This topic will help you understand how to use properties and signals to create interactive and dynamic QML applications. **Leave a Comment/Ask for Help:** If you have any questions or need help with any of the concepts covered in this topic, please leave a comment below. We will be happy to help you understand and apply the material effectively. **Practice Exercise:** Try building a simple QML application using the Rectangle, Text, and Image components. Experiment with different properties and styles to customize the appearance of the components.