**Course Title:** QML Application Development **Section Title:** Models and Views **Topic:** Creating a data-driven application using models and views.(Lab topic) In this lab topic, we will create a simple data-driven application using QML models and views. We will utilize the concepts learned in previous topics, such as models, views, and delegates. **Objective:** The objective of this lab is to create a QML application that fetches data from a model and displays it in a view, allowing users to interact with the data. **Step 1: Creating a Model** We will start by creating a simple model that will hold our data. In this case, we will use a ListModel to hold a list of books. ```qml // BookModel.qml import QtQuick 2.0 ListModel { ListElement { title: "Book 1" author: "Author 1" } ListElement { title: "Book 2" author: "Author 2" } ListElement { title: "Book 3" author: "Author 3" } } ``` **Step 2: Creating a View** Next, we will create a view that will display the data from our model. We will use a ListView to display the list of books. ```qml // BookView.qml import QtQuick 2.0 import QtQuick.Controls 2.0 ListView { anchors.fill: parent model: BookModel {} delegate: bookDelegate } Component { id: bookDelegate Rectangle { width: parent.width height: 50 color: "lightblue" Text { text: title + " by " + author font.pointSize: 12 } } } ``` **Step 3: Displaying the View** Finally, we will display our view in the main window of our application. ```qml // main.qml import QtQuick 2.0 import QtQuick.Controls 2.0 ApplicationWindow { visible: true width: 400 height: 600 BookView { anchors.fill: parent } } ``` **Example Use Case:** In this example, we have created a simple data-driven application that displays a list of books. The application uses a ListModel to hold the data and a ListView to display the data. **Key Concepts:** * Models: In QML, models are used to provide data to views. In this example, we used a ListModel to hold a list of books. * Views: Views are used to display data from models. In this example, we used a ListView to display the list of books. * Delegates: Delegates are used to define the layout of each item in a view. In this example, we used a Rectangle with a Text component to display each book's title and author. **Practical Takeaways:** * When creating a data-driven application, separate your data into models and your layout into views. * Use delegates to define the layout of each item in a view. * Use ListViews to display lists of data. **What's Next:** In the next topic, we will learn about integrating QML with C++ backends. Do you have any questions or need help with this topic? Please leave a comment. **External Resources:** * [Qt Documentation: Models and Views](https://doc.qt.io/qt-5/model-view-programming.html) * [Qt Documentation: ListModel](https://doc.qt.io/qt-5/qml-qtquick-listmodel.html) * [Qt Documentation: ListView](https://doc.qt.io/qt-5/qml-qtquick-listview.html)