[英]wxPython Application.DoEvents() equivalent?
Is there an Application.DoEvents() equivalent in wxPython? wxPython中是否有等效的Application.DoEvents()?
I am creating a form, then doing a slow I/O event, and the form is only partially drawn until the event finishes. 我正在创建一个表单,然后执行一个缓慢的I / O事件,并且仅在事件完成之前才部分绘制该表单。 I'd like to have the form fully drawn before the I/O starts.
我想在I / O开始之前完整绘制表格。
I've tried self.Refresh()
, but it has no effect. 我已经尝试过
self.Refresh()
,但是没有效果。
wx.Yield
or wx.SafeYield
wx.Yield
或wx.SafeYield
Although you should really use a separate thread to do the I/O and use wx.CallAfter
to post updates to the GUI thread. 尽管您实际上应该使用单独的线程来执行I / O,并使用
wx.CallAfter
将更新发布到GUI线程。
I usually use a pattern like this: 我通常使用这样的模式:
def start_work(self):
thread = threading.Thread(target=self.do_work, args=(args, go, here))
thread.setDaemon(True)
thread.start()
def do_work(self, args, go, here):
# do work here
# wx.CallAfter will call the specified function on the GUI thread
# and it's safe to call from a separate thread
wx.CallAfter(self.work_completed, result, args, here)
def work_completed(self, result, args, here):
# use result args to update GUI controls here
self.text.SetLabel(result)
You would call start_work
from the GUI, for example on an EVT_BUTTON
event to start the work. 您可以从GUI调用
start_work
,例如在EVT_BUTTON
事件上启动工作。 do_work
is run on a separate thread but it cannot do anything GUI related because that has to be done on the GUI thread. do_work
在单独的线程上运行,但是它不能执行与GUI相关的任何操作,因为必须在GUI线程上完成。 So you use wx.CallAfter
to run a function on the GUI thread, and you can pass it arguments from the work thread. 因此,您可以使用
wx.CallAfter
在GUI线程上运行一个函数,并且可以从工作线程传递该参数。
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