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'''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 Control:
def __init__(self):
self.arg = False
class QtGuiSigLambda(UsesQApplication):
def testButton(self):
#Connecting a lambda to a QPushButton.clicked()
obj = QPushButton('label')
ctr = Control()
func = lambda: setattr(ctr, 'arg', True)
QObject.connect(obj, SIGNAL('clicked()'), func)
obj.click()
self.assert_(ctr.arg)
QObject.disconnect(obj, SIGNAL('clicked()'), func)
def testSpinButton(self):
#Connecting a lambda to a QPushButton.clicked()
obj = QSpinBox()
ctr = Control()
arg = 444
func = lambda x: setattr(ctr, 'arg', 444)
QObject.connect(obj, SIGNAL('valueChanged(int)'), func)
obj.setValue(444)
self.assertEqual(ctr.arg, arg)
QObject.disconnect(obj, SIGNAL('valueChanged(int)'), func)
if __name__ == '__main__':
unittest.main()
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