Signaling test

signals-slots.py

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

import sys

from PySide import QtCore, QtGui


class Foo(QtGui.QWidget):
    some_signal_1 = QtCore.Signal(str)
    some_signal_2 = QtCore.Signal(list)

    def __init__(self):
        QtGui.QWidget.__init__(self)

        self.some_signal_1.connect(self.some_slot_1)
        self.some_signal_1.connect(self.some_slot_2)
        self.some_signal_1.connect(self.some_slot_3)
        self.some_signal_1.connect(self.some_slot_4)

        self.some_signal_2.connect(self.some_slot_a)

    @QtCore.Slot(str)
    def some_slot_1(self, data):
        print "Slot 1 - data: {0} - type(data): {1}".format(data, type(data))

    @QtCore.Slot(float)
    def some_slot_2(self, data):
        print "Slot 2 - data: {0} - type(data): {1}".format(data, type(data))

    @QtCore.Slot(int)
    def some_slot_3(self, data):
        print "Slot 2 - data: {0} - type(data): {1}".format(data, type(data))

    @QtCore.Slot(list)
    def some_slot_4(self, data):
        print "Slot 4 - data: {0} - type(data): {1}".format(data, type(data))

    @QtCore.Slot(str)
    def some_slot_a(self, data):
        print "Slot a - data: {0} - type(data): {1}".format(data, type(data))

    def something(self):
        self.some_signal_1.emit('blah')
        self.some_signal_1.emit(['a', 12, 'b'])
        self.some_signal_2.emit(42)


if __name__ == '__main__':
    app = QtGui.QApplication(sys.argv)
    foo = Foo()
    foo.something()

Output:

$ python signals-slots.py
Slot 1 - data: blah - type(data): <type 'unicode'>
Slot 2 - data: blah - type(data): <type 'unicode'>
Slot 2 - data: blah - type(data): <type 'unicode'>
Slot 4 - data: blah - type(data): <type 'unicode'>
Slot 1 - data:  - type(data): <type 'unicode'>
Slot 2 - data:  - type(data): <type 'unicode'>
Slot 2 - data:  - type(data): <type 'unicode'>
Slot 4 - data:  - type(data): <type 'unicode'>
Slot a - data: 42 - type(data): <type 'int'>