signal_and_slots.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-


"""
Connecting a signal of a QtGui.QSlider to a slot of a QtGui.QLCDNumber

Author : Sukhvinder Singh | karramsos@gmail.com | @karramsos
"""

import sys
from PySide import QtGui, QtCore

class Example(QtGui.QWidget):
    
    def __init__(self):
        super(Example, self).__init__()
        
        self.initUI()
    
    def initUI(self):
        
        lcd = QtGui.QLCDNumber(self)
        sld = QtGui.QSlider(QtCore.Qt.Horizontal, self)
        
        vbox = QtGui.QVBoxLayout()
        vbox.addWidget(lcd)
        vbox.addWidget(sld)
        
        self.setLayout(vbox)
        sld.valueChanged.connect(lcd.display)
        
        self.setGeometry(300, 300, 250, 150)
        self.setWindowTitle('Signal & slot')
        self.show()
        
def main():
    
    app = QtGui.QApplication(sys.argv)
    ex = Example()
    sys.exit(app.exec_())
    
if __name__ == '__main__':
    main()