Hi,
I have a problem with passing signals a cross threads.
I was under the impression that when using Qt.QueuedConnection the slot
would always be executed in the thread that the receiver object lived. But
when I created this test application I does not seem to be doing that. Any
suggestions on what the error might be?
Btw, I'm working on a tutorial on using signal and slots with python over at
http://developernew.kde.org/Development/Tutorials/101_Python_introduction_to_signal_and_slots
Feel free to improve it. Feedback and suggestions are also most welcome.
English is not my native language so I guess there are plenty of mistakes :/
from PyQt4.QtGui import *
from PyQt4.QtCore import *
import sys
class MyUI(QMainWindow):
def __init__(self):
QMainWindow.__init__(self)
self.list=QListWidget()
self.setCentralWidget(self.list)
def newItem(self,item):
self.list.addItem(item)
class MyWorkerThread(QThread):
def __init__(self,ui):
QThread.__init__(self)
self.ui=ui
def run(self):
self.connect(self,SIGNAL("createdItem"),self.ui.newItem,
Qt.QueuedConnection)
for i in range (1,10):
#creating items
self.emit(SIGNAL("createdItem"),i)
self.exec_()
if __name__=="__main__":
app=QApplication(sys.argv)
window=MyUI()
window.show()
worker=MyWorkerThread(window)
worker.start()
app.exec_()
This code outputs:
QObject: Cannot create children for a parent that is in a different thread.
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