In this article we will see how we can add looping to the spin box, when we create a spin box by default when it reaches the maximum value it can’t be incremented any more similarly when it reaches minimum value it can’t be decremented any more. By adding looping to the spin box the values repeat it self after the maximum or minimum value is reached.
Implementation steps :
1. Create a window
2. Create a spin box
3. Set range of the spin box such that it has one extra value for minimum and maximum value for example if we want values from 0 to 100 set range to -1 to 101
4. Add action to the spin box such that every time its value changes action should get called
5. Inside the action get the current value of the spin box.
6. Check if current value is equal to the minimum value then set current value of spin box to maximum value – 1
7. Else check if current value is equal to maximum value then make current value of spin box to minimum + 1
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, 150, 40) # setting range to the spin box self.spin.setRange(-1, 11) # setting prefix to spin self.spin.setPrefix("Value : ") # add action to this spin box self.spin.valueChanged.connect(self.action_spin) # method called after editing finished def action_spin(self): # getting current value of spin box current = self.spin.value() # checking if current value is minimum if current == -1: # setting spin box value to maximum - 1 self.spin.setValue(10) # checking if current value is maximum elif current == 11: # setting spin box value to minimum + 1 self.spin.setValue(0) # create pyqt5 app App = QApplication(sys.argv) # create the instance of our Window window = Window() # start the app sys.exit(App.exec()) |
Output :
