**Topic: Animation and Modern App Design** In this example, we will create a modern app design that incorporates animations using PyQt6 and Qt Quick. We will build a scrolling list of cards with animated transitions. **Design Overview** Our app will have a single page with a list of cards. Each card will display an image, title, and description. When the user scrolls the list, the cards will animate in and out of view. **Code Structure** Our app will consist of three main files: 1. `main.py`: This is the main application file that sets up the PyQt6 app and loads the Qt Quick view. 2. `main.qml`: This is the Qt Quick file that defines the user interface and animations. 3. `card.qml`: This is a Qt Quick component that defines the card item. **main.py** ```python import sys from PyQt6.QtCore import QUrl from PyQt6.QtGui import QGuiApplication from PyQt6.QtQuick import QQuickView if __name__ == "__main__": app = QGuiApplication(sys.argv) view = QQuickView() view.setSource(QUrl("qrc:///main.qml")) view.setResizeMode(QQuickView.ResizeMode.SizeRootObjectToView) view.resize(800, 600) view.show() sys.exit(app.exec()) ``` **main.qml** ```qml import QtQuick 2.15 import QtQuick.Window 2.15 import QtQuick.Controls 2.15 import QtQuick.Layouts 1.15 Window { visible: true width: 800 height: 600 title: "Animated Card List" Flickable { anchors.fill: parent contentHeight: column.height Column { id: column spacing: 16 Repeater { model: 10 Card { image: "https://picsum.photos/200/300" title: "Card " + modelData description: "This is card " + modelData } } } } } ``` **card.qml** ```qml import QtQuick 2.15 import QtQuick.Controls 2.15 Rectangle { id: card width: 200 height: 300 color: "#fff" radius: 16 border.color: "#ddd" border.width: 1 Image { id: image anchors.top: parent.top anchors.left: parent.left anchors.right: parent.right height: 150 source: card.image states: [ State { name: "visible" when: cardvisible PropertyChanges { target: image opacity: 1 } }, State { name: "hidden" when: !cardvisible PropertyChanges { target: image opacity: 0 } } ] transitions: [ Transition { from: "*" to: "*" opacity: 0.5 easing.type: Easing.InOutQuad } ] } Text { id: title anchors.top: image.bottom anchors.left: parent.left anchors.right: parent.right font.pixelSize: 24 font.bold: true text: card.title } Text { id: description anchors.top: title.bottom anchors.left: parent.left anchors.right: parent.right font.pixelSize: 16 text: card.description } visible: opacity != 0 opacity: 0 Behavior on opacity { NumberAnimation { duration: 200 } } onVisibleChanged: if (visible) opacity = 1 } ``` **Explanation** Our app uses a Repeater to create a list of Card components. Each Card component has an Image, Text title, and Text description. The Image is animated to fade in and out of view using States and Transitions. The Card component has a visible property that is bound to the opacity property. When the Card is visible, the opacity is set to 1, and when it is not visible, the opacity is set to 0. The Behavior on opacity is used to animate the transition between these two states. **Result** The app will display a scrolling list of cards with animated transitions. When the user scrolls the list, the cards will animate in and out of view. **Packaging and Distribution** To package and distribute the app, you can use a tool like Qt Installer Framework. This will allow you to create a deployable package that can be installed on Windows, macOS, and Linux. **Conclusion** In this example, we created a modern app design that incorporates animations using PyQt6 and Qt Quick. We used States and Transitions to animate the Image component in the Card component, and we used a Repeater to create a list of Card components. We also packaged and distributed the app using Qt Installer Framework. This example demonstrates how to create a modern and engaging app design using PyQt6 and Qt Quick.