'''Connecting lambda to gui signals'''

import unittest

from PySide.QtCore import QObject, SIGNAL

try:
    from PySide.QtGui import QSpinBox, QPushButton
    hasQtGui = True
except ImportError:
    hasQtGui = False

from helper import UsesQApplication

if hasQtGui:
    class QtGuiSigLambda(UsesQApplication):

        def testButton(self):
            #Connecting a lambda to a QPushButton.clicked()
            obj = QPushButton('label')
            QObject.connect(obj, SIGNAL('clicked()'),
                            lambda: setattr(obj, 'called', True))
            obj.click()
            self.assert_(obj.called)

        def testSpinButton(self):
            #Connecting a lambda to a QPushButton.clicked()
            obj = QSpinBox()
            arg = 444
            QObject.connect(obj, SIGNAL('valueChanged(int)'),
                            lambda x: setattr(obj, 'arg', 444))
            obj.setValue(444)
            self.assertEqual(obj.arg, arg)

if __name__ == '__main__':
    unittest.main()