Main thread - worker thread communication.

[kikapu]

You're not using signals and slots here. First of all you should use Qt threads instead of Python threads, otherwise there is a good chance it won't work properly.

But i thought that i used Signals and Slots...Isn't the declaration "def on_start_clicked(self):" just an alternative way to the usual "QtCore.QObject.connect" call ?
I mean, the Signals and Slots mechanism is underneath of both ways, isn't ??

In run() method of the thread create an object that inherits QObject and there declare a signal which you then have to emit each time you want to change the progress bar value. Then connect the signal to the setValue slot in the progress bar and start the thread.

Ok, i will try right know this and i let you know. Should i implement a QThread instead of a Python one ??

And forget about processEvents() - you don't need it.

Ok, i just did (forgot)

[wysota]

Yes, provided that start is a button. Yes, you should use QThreads.

[jpn]

But i thought that i used Signals and Slots...Isn't the declaration "def on_start_clicked(self):" just an alternative way to the usual "QtCore.QObject.connect" call ?
I mean, the Signals and Slots mechanism is underneath of both ways, isn't ??

Connecting Signals and Slots