PyQt5 QSpinBox – Adding border to the down button on mouse hover

In this article we will see how we can add border to the down button of spin box when mouse hover over it. Spin box consist of two buttons up and down, down button is used to decrement the value, it has its own default border although we can change it. Customized border will appear to the down button when mouse hover over it.
In order to do this we have to change the style sheet code associated with the spin box, below is the stylesheet code
QSpinBox::down-button:hover
{
border : 4px solid blue;
}
Below is the implementation
| # importing libraries fromPyQt5.QtWidgets import*fromPyQt5 importQtCore, QtGui fromPyQt5.QtGui import*fromPyQt5.QtCore import*importsys   classWindow(QMainWindow):      def__init__(self):         super().__init__()          # setting title         self.setWindowTitle("Python ")          # setting geometry         self.setGeometry(100, 100, 600, 400)          # calling method         self.UiComponents()          # showing all the widgets         self.show()      # method for widgets     defUiComponents(self):         # creating spin box         self.spin =QSpinBox(self)          # setting geometry to spin box         self.spin.setGeometry(100, 100, 250, 40)          # setting prefix to spin         self.spin.setPrefix("Prefix ")          # setting suffix to spin         self.spin.setSuffix(" Suffix")          # setting style sheet to the spin box         # adding border to the down button of spin box         # and when mouse hover over it         self.spin.setStyleSheet("QSpinBox::down-button:hover"                                "{"                                "border : 4px solid red;"                                "}")  # create pyqt5 app App =QApplication(sys.argv)  # create the instance of our Window window =Window()  # start the app sys.exit(App.exec())  | 
Output :
 
				 
					


