Mastering GUI Programming with Python

An alternate method

Although the moveToThread() method of working with QThread is the preferred approach recommended by the documentation, there is another way that works perfectly well and, in some way, simplifies our code. This approach is to create our Worker class by subclassing QThread and overriding the run() method using our worker code.

For example, create a copy of SlowSearcher and alter it as follows:

class SlowSearcherThread(qtc.QThread):    # rename "do_search()" to "run()":    def run (self):        root = qtc.QDir.rootPath()        self._search(self.term, root)        self.finished.emit()    # The rest of the class is the same

Here, we've altered only three things:

• We've renamed the class to SlowSearcherThread.
• We've changed the parent class to QThread ...