**Animation and Modern App Design** In this example, we'll create a modern, animated login interface using PyQt6. We'll leverage the power of Qt's animation framework, along with some custom styling to create a sleek and engaging user interface. **Example: Animated Login Interface** ### animate_login.py ```python import sys from PyQt6 import QtWidgets, QtCore, QtGui from PyQt6.QtCore import QPropertyAnimation class LoginWindow(QtWidgets.QWidget): def __init__(self): super().__init__() self.setWindowTitle("Animated Login") self.setGeometry(300, 300, 400, 400) self.container = QtWidgets.QWidget() self.container.setStyleSheet("background-color: #2f3436;") self.layout = QtWidgets.QVBoxLayout() self.layout.setContentsMargins(0, 0, 0, 0) self.layout.setSpacing(20) self.title_label = QtWidgets.QLabel("Login") self.title_label.setStyleSheet("color: white; font-size: 24pt;") self.username_input = QtWidgets.QLineEdit() self.username_input.setStyleSheet("background-color: #35393a; color: white; border: none;") self.password_input = QtWidgets.QLineEdit() self.password_input.setEchoMode(QtWidgets.QLineEdit.EchoMode.Password) self.password_input.setStyleSheet("background-color: #35393a; color: white; border: none;") self.login_button = QtWidgets.QPushButton("Login") self.login_button.setStyleSheet("background-color: #66bb6a; color: white; border: none;") self.layout.addWidget(self.title_label) self.layout.addWidget(self.username_input) self.layout.addWidget(self.password_input) self.layout.addWidget(self.login_button) self.container.setLayout(self.layout) self.animation = QPropertyAnimation(self.container, b"windowOpacity") self.animation.setDuration(1000) self.animation.setStartValue(0.0) self.animation.setEndValue(1.0) self.animation.finished.connect(self.on_animation_finished) self.layout_container = QtWidgets.QVBoxLayout() self.layout_container.setContentsMargins(50, 50, 50, 50) self.layout_container.addWidget(self.container) self.setLayout(self.layout_container) self.show() self.animation.start() def on_animation_finished(self): self.login_button.clicked.connect(self.on_login_clicked) def on_login_clicked(self): # Simulate login process print("Login successful!") if __name__ == "__main__": app = QtWidgets.QApplication(sys.argv) window = LoginWindow() sys.exit(app.exec()) ``` This example uses a combination of Qt's animation framework and custom styling to create a modern login interface. The animation is triggered when the window is first shown, which fades in the login form. Once the animation is complete, the login button is enabled. Note: Make sure to have the `PyQt6` package installed to run this example. You can install it using pip: `pip install PyQt6`. Illustration: ``` +---------------+ | Login | +---------------+ | +------------+ | | Username | | +------------+ | | Password | | +------------+ | | Login | | +------------+ +---------------+ ``` This is just a basic example to demonstrate the concept. You can customize the design and layout to fit your specific needs. **Best Practices** * Use custom styling to enhance your app's visual appearance. * Leverage Qt's animation framework to create engaging user experiences. * Keep your code organized and readable by using clear variable names and comments. **External Resources** * Qt for Python Documentation: <https://www.riverbankcomputing.com/software/pyqt/> * Qt Animation Framework Documentation: <https://doc.qt.io/qt-6/animation-overview.html> **Leave a Comment** We'd love to hear your feedback on this example! Please leave a comment below with any suggestions or questions you may have.