In this article we will see how we can get the widget which is previous in focus chain of the spin box. Spin box consist of two child widgets one is line edit and other one is the arrow buttons. Focus is set widget by widget i.e focus chain therefore when spin box get focus its one child get focus before the another child similarly before spin box, main window comes in focus chain.
In order to do this we use previousInFocusChain method with the spin box object.
Syntax : spin_box.previousInFocusChain()
Argument : It takes no argument
Return : It returns QWidget object
Below is the implementation
# importing libraries from PyQt5.QtWidgets import * from PyQt5 import QtCore, QtGui from PyQt5.QtGui import * from PyQt5.QtCore import * import sys class Window(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 def UiComponents(self): # creating spin box self.spin = QSpinBox(self) # setting geometry to spin box self.spin.setGeometry(100, 100, 250, 40) # setting range to the spin box self.spin.setRange(1, 999999) # setting prefix to spin self.spin.setPrefix("PREFIX ") # setting suffix to spin self.spin.setSuffix(" SUFFIX") # creating a label label = QLabel(self) # making the label multi line label.setWordWrap(True) # setting geometry to the label label.setGeometry(100, 200, 200, 60) # getting previous widget in focus chain value = self.spin.previousInFocusChain() # setting text to the label label.setText("Previous in focus chain : " + str(value)) # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App.exec()) |
Output :
