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PyQt5 QDoubleSpinBox – Getting Value Changed Signal

  • Last Updated : 14 Jul, 2020

In this article we will see how we can get the value changed signal of the QDoubleSpinBox. User can set any decimal value(float) to the QDoubleSpinBox with the help of mouse and keyboard, but sometimes there is a need of setting value programmatically in order to overwrite the value entered by the user, it can be set with the help of setValue method. This signal get emitted when the value get changed.

In order to do this we will use valueChanged method with the QDateTimeEdit object.

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Syntax : dd_spin.valueChanged.connect(method)

Argument : It takes method as argument

Return : It returns None

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):
        # setting title
        self.setWindowTitle("Python ")
        # setting geometry
        self.setGeometry(100, 100, 500, 400)
        # calling method
        # showing all the widgets
    # method for components
    def UiComponents(self):
        # creating double spin box
        d_spin = QDoubleSpinBox(self)
        # setting geometry to the double spin box
        d_spin.setGeometry(100, 100, 150, 40)
        # creating a label
        label = QLabel("GeeksforGeeks", self)
        # setting geometry to the label
        label.setGeometry(100, 200, 300, 80)
        # making label multi line
        # getting value changed signal of double spin box
        d_spin.valueChanged.connect(lambda: spin_method())
        def spin_method():
            # setting text to the label
            label.setText("Value Changed Signal")
# create pyqt5 app
App = QApplication(sys.argv)
# create the instance of our Window
window = Window()
# start the app

Output :

My Personal Notes arrow_drop_up
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