[PyQt] Using Qt to emit a signal (or maybe with QTimer)

[deanhystad]

I took this answer for a related question.

https://stackoverflow.com/questions/6884...hdog-on-qt

And maybe modified it to work with your code. I do not have the watchdog module installed and I don't know anything about your image analyzer. Really untested code here:

# Many imports

class Bridge(QtCore.QObject):
    '''Serves as a bridge between watchdog thread and Qt thread'''
    created = QtCore.Signal(FileSystemEvent)


class Handler(FileSystemEventHandler):
    '''watchdog observer event handler'''
    def __init__(self):
        super().__init__()
        self.bridge = Bridge()

    def on_created(self, event):
        '''Emit signal when hdf5 file is created'''
        if event.src_path[-4:] == 'hdf5':
            self.bridge.created.emit(event)


class MyMainWindow(QtGui.QMainWindow, Ui_MainWindow):
    """My designer created window"""

    def __init__(self, path):
        super().__init__()

        ...

        # Create observer to signal my new_file method when an
        # hdf5 file is created in path.
        handler = Handler()
        handler.bridge.created.connect(self.new_file)
        observer = Observer()
        observer.schedule(handler, path, recursive=True)
        observer.start()

    def new_file(self, event):
        '''Method called when hdf5 file is created.  Passed a FileSystemEvent'''
        print(event.src_path)
        ...

def main():
    path = ...
    app = QtWidgets.QApplication()
    form = MyMainWindow(path)
    form.show()
    app.exec_()

if __name__ == '__main__':
    main()