PyQt5 QListWidget - Setting Horizontal Scroll Bar

PyQt5 QListWidget - Setting Horizontal Scroll Bar

In PyQt5, adding a horizontal scroll bar to a QListWidget can be done by adjusting its horizontalScrollBarPolicy. By default, QListWidget comes with both vertical and horizontal scroll bars which are activated as needed. However, if you specifically want to control the behavior of the horizontal scroll bar, you can set it to always be on, always be off, or turn on automatically when needed.

Here's how you can adjust the horizontal scroll bar policy of a QListWidget:

Step 1: Install PyQt5

If you haven't already installed PyQt5, you can do so via pip:

pip install PyQt5

Step 2: Create a Basic PyQt5 Application with QListWidget

In your Python script, start by creating a basic PyQt5 application and a QListWidget:

import sys from PyQt5.QtWidgets import QApplication, QListWidget, QMainWindow from PyQt5.QtCore import Qt class MainWindow(QMainWindow): def __init__(self): super().__init__() # Create a QListWidget self.list_widget = QListWidget(self) # Add items with long text for i in range(10): self.list_widget.addItem('Item with a really, really, really, really, long text ' + str(i)) # Set the geometry of the QListWidget self.list_widget.setGeometry(50, 50, 200, 200) # Set horizontal scroll bar policy self.list_widget.setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOn) # Set the window title self.setWindowTitle('QListWidget Example') # Create an instance of QApplication app = QApplication(sys.argv) main_window = MainWindow() main_window.show() # Start the application's main loop sys.exit(app.exec_())

In this example:

  • A QListWidget is added to the MainWindow.
  • The setHorizontalScrollBarPolicy(Qt.ScrollBarAlwaysOn) method is used to ensure that the horizontal scroll bar is always visible.
  • Long text items are added to the list widget to make the horizontal scroll bar functional.

Step 3: Run the Application

Run your Python script. The QListWidget will display with a horizontal scroll bar that is always visible, allowing you to scroll through items with long text.

Customization Options

  • Qt.ScrollBarAlwaysOn: The scroll bar is always visible.
  • Qt.ScrollBarAlwaysOff: The scroll bar is always hidden.
  • Qt.ScrollBarAsNeeded: The scroll bar is visible only when needed (default behavior).

By adjusting these settings, you can control the appearance and behavior of the scroll bars in your QListWidget in PyQt5.

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