PyQt5 QSpinBox - Getting background role

PyQt5 QSpinBox - Getting background role

In PyQt5, each widget has a set of "roles" related to its palette. These roles define colors for various parts of a widget's appearance. The backgroundRole() method of a widget returns the role used to render the widget's background.

Here's how you can get the background role of a QSpinBox:

import sys from PyQt5.QtWidgets import QApplication, QWidget, QVBoxLayout, QSpinBox, QLabel from PyQt5.QtGui import QPalette class App(QWidget): def __init__(self): super().__init__() self.initUI() def initUI(self): layout = QVBoxLayout() spinbox = QSpinBox(self) layout.addWidget(spinbox) # Get background role role = spinbox.backgroundRole() role_name = QPalette.colorRoleNames()[role] # Convert the role to its string name label = QLabel(f"Background Role: {role_name}") layout.addWidget(label) self.setLayout(layout) self.setWindowTitle('QSpinBox Background Role') self.show() app = QApplication(sys.argv) window = App() sys.exit(app.exec_())

In this example:

  • We create a QSpinBox.
  • We use the backgroundRole() method to get the background role of the QSpinBox.
  • We convert the role to its string representation using QPalette.colorRoleNames() for display.
  • We display the role's name in a QLabel.

Typically, for many widgets, the background role will be "Window", but this can change if you adjust the widget's palette or if the widget has a different default style or palette.

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