How to signal from a running QThread back to the PyQt Gui that started it?

Question

I am trying to understand how to use signaling from a Qthread back to the Gui interface that started.

Setup: I have a process (a simulation) that needs to run almos

Answer 1

The problem here is simple: your SimulRunner never gets sent a signal that causes it to start its work. One way of doing that would be to connect it to the started signal of the Thread.

Also, in python you should use the new-style way of connecting signals:

...
self.simulRunner = SimulRunner()
self.simulThread = QThread()
self.simulRunner.moveToThread(self.simulThread)
self.simulRunner.stepIncreased.connect(self.currentStep.setValue)
self.stopButton.clicked.connect(self.simulRunner.stop)
self.goButton.clicked.connect(self.simulThread.start)
# start the execution loop with the thread:
self.simulThread.started.connect(self.simulRunner.longRunning)
...