wx.Gauge未实时更新

Question

我在实时更新wx.Gauage时遇到问题。wx.Gauge在一个名为ProgressWindow的类中实例化。ProgressWindow用于在工作完成时提供进度条。更新仪表是在一个单独的线程上完成的，这样它就不会阻塞正在完成的工作。不幸的是，当我实例化并启动进度窗口时，仪表仅在"fn_testing_progress_window“测试函数的最后更新。有谁知道为什么会发生这种情况吗？我正在尝试在调用"fn_increment_count“时更新仪表。

注意:我之所以有一个队列来处理更新仪表的请求，是因为如果正在完成的工作分布在多个线程中，每个线程都可以更新仪表。

def fn_testing_progress_window():
    pw = ProgressWindow(self.main_panel)
    pw.fn_start()

    pw.fn_increment_count(increment = 50, msg = "50 Now")
    time.sleep(3)
    pw.fn_increment_count(increment = 75, msg = "75 Now")
    time.sleep(3)
    pw.fn_increment_count(increment = 100, msg = "Finished")


def fn_start(self):
    print "Starting Progress"
    _runner_thread = threading.Thread(target = self.fn_run)
    _runner_thread.start()

def fn_run(self):
    self._running = True
    self._current_count = 0

    while(self._running):
        # Wait til there is something in queue or til run is stopped
        while True:
            if (not self._update_queue.empty()):
                print "not empty"
                break

            if (not self._running):
                break

        _value, _msg = self._update_queue.get()

        # Update progress bar accordingly
        if _value:
            self._current_count += _value
            print "Updating value: %d" %(self._current_count)
            wx.CallAfter(self._progress_gauge.SetValue, self._current_count)

        if _msg:
            print "Updating msg: %s" %(_msg)
            wx.CallAfter(self._progress_output.SetValue, str(_msg))

        if (self._current_count >= self._total_count):
            pass

        # Have time for msg to appear
        time.sleep(0.1)


def fn_increment_count(self,
                       increment = 1,
                       msg = None):
    """
    Ability to update current count on progress bar and progress msg.
    If nothing provided increments current count by 1
    """
    _item_l = (increment, msg)
    self._update_queue.put(_item_l)