**Course Title:** PyQt6 Application Development **Section Title:** Building Responsive and Adaptive UIs **Topic:** Implementing QSplitter and QTabWidget for multi-view interfaces In this topic, we will explore two powerful tools for creating multi-view interfaces in PyQt6: QSplitter and QTabWidget. These widgets enable you to design complex, responsive, and user-friendly interfaces that can display multiple views or panels, allowing users to easily switch between them. **QSplitter: A Flexible Way to Split Your UI** QSplitter is a widget that allows you to divide your UI into multiple views or panels, with a movable handle (called a "splitter handle") that users can drag to adjust the size of each panel. This is useful for creating split-screen interfaces, such as a text editor with a preview panel, or a file manager with a folder tree and a file list. Here's an example of how to use QSplitter: ```python import sys from PyQt6.QtWidgets import QApplication, QWidget, QSplitter, QTextEdit, QVBoxLayout class SplitterExample(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): self.setGeometry(100, 100, 800, 600) layout = QVBoxLayout() self.setLayout(layout) splitter = QSplitter() layout.addWidget(splitter) text_edit1 = QTextEdit() text_edit1.setText("This is the left panel.") text_edit2 = QTextEdit() text_edit2.setText("This is the right panel.") splitter.addWidget(text_edit1) splitter.addWidget(text_edit2) self.show() if __name__ == '__main__': app = QApplication(sys.argv) ex = SplitterExample() sys.exit(app.exec()) ``` In this example, we create a QSplitter widget and add two QTextEdit widgets to it. We then set the QSplitter as the central widget of our main window. **QTabWidget: A Convenient Way to Organize Multiple Views** QTabWidget is a widget that allows you to organize multiple views or panels into a tabbed interface. Each tab has its own content, and users can switch between them by clicking on the tab headers. Here's an example of how to use QTabWidget: ```python import sys from PyQt6.QtWidgets import QApplication, QWidget, QTabWidget, QTextEdit, QVBoxLayout, QLabel class TabWidgetExample(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): self.setGeometry(100, 100, 800, 600) layout = QVBoxLayout() self.setLayout(layout) tab_widget = QTabWidget() layout.addWidget(tab_widget) tab1 = QTextEdit() tab1.setText("This is the content of tab 1.") tab2 = QLabel("This is the content of tab 2.") tab_widget.addTab(tab1, "Tab 1") tab_widget.addTab(tab2, "Tab 2") self.show() if __main__ == '__main__': app = QApplication(sys.argv) ex = TabWidgetExample() sys.exit(app.exec()) ``` In this example, we create a QTabWidget and add two tabs to it: a QTextEdit widget with some text, and a QLabel widget with some text. We then set the QTabWidget as the central widget of our main window. **Key Concepts** * QSplitter allows you to divide your UI into multiple views or panels, with a movable handle that users can drag to adjust the size of each panel. * QTabWidget allows you to organize multiple views or panels into a tabbed interface, where each tab has its own content and users can switch between them by clicking on the tab headers. * Both QSplitter and QTabWidget are powerful tools for creating responsive and user-friendly interfaces. **Practical Takeaways** * Use QSplitter to create split-screen interfaces, such as a text editor with a preview panel, or a file manager with a folder tree and a file list. * Use QTabWidget to organize multiple views or panels into a tabbed interface, such as a settings window with multiple tabs for different settings. * Experiment with different layouts and arrangements to find the most effective way to use QSplitter and QTabWidget in your application. **Further Reading** * Qt Documentation: [QSplitter](https://doc.qt.io/qt-6/qsplitter.html) * Qt Documentation: [QTabWidget](https://doc.qt.io/qt-6/qtabwidget.html) **Leave a Comment!** If you have any questions or comments about this topic, feel free to leave a comment below! Your feedback is always appreciated. **What's Next?** In the next topic, we'll cover "Best practices for responsive desktop app design". Stay tuned!