PyQt4SingalAndSlot

signal_and_slot.py

# -*- coding: utf8 -*-

import sys

from PyQt4.QtCore import *
from PyQt4.QtGui import *


class Form(QDialog):
    def __init__(self, parent=None):
        super(Form, self).__init__(parent)

        dial = QDial()
        dial.setNotchesVisible(True)
        spinbox = QSpinBox()
        layout = QHBoxLayout()
        layout.addWidget(dial)
        layout.addWidget(spinbox)
        self.setLayout(layout)


        self.connect(dial, SIGNAL("valueChanged(int)"),
                    spinbox, SLOT("setValue(int)"))
        self.connect(spinbox, SIGNAL("valueChanged(int)"),
                    dial, SLOT("setValue(int)"))
        self.setWindowTitle("SignalAndSlot")

app = QApplication(sys.argv)
form = Form()
form.show()
app.exec_()