PyQt5 QScrollBar - Setting Slider Position

PyQt5 QScrollBar - Setting Slider Position

In PyQt5, to set the position of a slider in a QScrollBar, you can use the setValue method. This method takes an integer value which represents the new position of the slider within the scrollbar's range. The range of the scrollbar is defined by its minimum and maximum values, which you can set using the setMinimum and setMaximum methods.

Here's a basic example demonstrating how to create a QScrollBar and set its slider position:

import sys from PyQt5.QtWidgets import QApplication, QMainWindow, QScrollBar, QVBoxLayout, QWidget class MainWindow(QMainWindow): def __init__(self): super().__init__() # Create a central widget central_widget = QWidget(self) self.setCentralWidget(central_widget) # Create a QVBoxLayout instance layout = QVBoxLayout(central_widget) # Create a QScrollBar scroll_bar = QScrollBar(self) # Set the range of the scrollbar scroll_bar.setMinimum(0) scroll_bar.setMaximum(100) # Set the initial position of the slider scroll_bar.setValue(50) # Add the scrollbar to the layout layout.addWidget(scroll_bar) # Set window title and size self.setWindowTitle('QScrollBar Example') self.setGeometry(100, 100, 300, 200) # Run the application app = QApplication(sys.argv) window = MainWindow() window.show() sys.exit(app.exec_())

In this code:

  • A QScrollBar is created and added to the main window.
  • The scrollbar's range is set from 0 to 100 using setMinimum and setMaximum.
  • The slider position is initially set to 50 with setValue(50).

When you run this application, you will see a scrollbar with its slider positioned at the halfway point. You can adjust the range and initial slider position as needed for your application.

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