来自进程的简单wxPython post事件
我试图创建一个窗口,从进程接收简单的事件通知。以下是我目前掌握的代码:来自进程的简单wxPython post事件,python,user-interface,process,wxpython,Python,User Interface,Process,Wxpython,我试图创建一个窗口,从进程接收简单的事件通知。以下是我目前掌握的代码: import wx, wx.lib.newevent, time, sys from multiprocessing import Process size_width = 320 size_height = 240 background_color = (226,223,206) SomeNewEvent, EVT_SOME_NEW_EVENT = wx.lib.newevent.NewEvent() class
import wx, wx.lib.newevent, time, sys
from multiprocessing import Process
size_width = 320
size_height = 240
background_color = (226,223,206)
SomeNewEvent, EVT_SOME_NEW_EVENT = wx.lib.newevent.NewEvent()
class StatusWindow(wx.Frame):
def __init__(self, parent):
super(StatusWindow, self).__init__(parent, title='Monitor', size=(size_width, size_height))
self.Bind(EVT_SOME_NEW_EVENT, self.updateStatus)
staticBox = wx.StaticBox(self, label='Monitor Status:', pos=(5, 105), size=(size_width - 28, size_height/3))
self.statusLabel = wx.StaticText(staticBox, label='None', pos=(10, 35), size=(size_width, 20), style=wx.ALIGN_LEFT)
self.count = 0
self.InitUI()
self.monitor = cMonitor()
self.monitor.start()
def InitUI(self):
panel = wx.Panel(self)
self.SetBackgroundColour(background_color)
self.Centre()
self.Show()
def updateStatus(self, evt):
self.statusLabel.SetLabel(evt.attr1)
class cMonitor(Process):
def __init__(self):
super(cMonitor, self).__init__()
def run(self):
time.sleep(2)
print 'This is an update'
#create the event
evt = SomeNewEvent(attr1="Some event has just occured")
#post the event
wx.PostEvent(EVT_SOME_NEW_EVENT, evt)
if __name__ == '__main__':
app = wx.App()
window = StatusWindow(None)
app.MainLoop()
窗口已创建,但进程似乎未正确执行或发送事件后通知。我应该注意,run方法中的print语句也没有出现。是什么导致GUI未更新??这是我用来作为参考的:
首先,您的代码会抛出一个错误:
Traceback (most recent call last):
File "C:\Python27\lib\multiprocessing\process.py", line 232, in _bootstrap
self.run()
File "C:\PyProgs\stackoverflow_answers\wx_answers\wx_events1.py", line 44, in run
wx.PostEvent(EVT_SOME_NEW_EVENT, evt)
File "C:\Python27\lib\site-packages\wx-3.0-msw\wx\_core.py", line 8410, in PostEvent
return _core_.PostEvent(*args, **kwargs)
TypeError: in method 'PostEvent', expected argument 1 of type 'wxEvtHandler *'
根据,PostEvent(dest,event)
将事件发送到窗口或其他要稍后处理的wx.EvtHandler
,但在代码中,第一个参数的类型为PyEventBinder
。您的代码必须如下所示:
wx.PostEvent(self.wxWindow, evt)
其中self.wxWindow
-状态窗口的对象类。但还有另一个问题:不能将wxPython对象用作多处理器参数()
实现所需功能的一种方法-使用线程模块代替多处理:
import wx, wx.lib.newevent, time, sys
from threading import *
size_width = 320
size_height = 240
background_color = (226,223,206)
SomeNewEvent, EVT_SOME_NEW_EVENT = wx.lib.newevent.NewEvent()
class StatusWindow(wx.Frame):
def __init__(self, parent):
super(StatusWindow, self).__init__(parent, title='Monitor', size=(size_width, size_height))
self.Bind(EVT_SOME_NEW_EVENT, self.updateStatus)
staticBox = wx.StaticBox(self, label='Monitor Status:', pos=(5, 105), size=(size_width - 28, size_height/3))
self.statusLabel = wx.StaticText(staticBox, label='None', pos=(10, 35), size=(size_width, 20), style=wx.ALIGN_LEFT)
self.count = 0
self.InitUI()
# Set up event handler for any worker thread results
self.monitor = cMonitor(self)
self.monitor.start()
def InitUI(self):
panel = wx.Panel(self)
self.SetBackgroundColour(background_color)
self.Centre()
self.Show()
def updateStatus(self, evt):
self.statusLabel.SetLabel(evt.attr1)
class cMonitor(Thread):
def __init__(self, wxWindow):
super(cMonitor, self).__init__()
self.wxWindow = wxWindow
def run(self):
time.sleep(2)
print 'This is an update'
#create the event
evt = SomeNewEvent(attr1="Some event has just occured")
#post the event
wx.PostEvent(self.wxWindow, evt)
if __name__ == '__main__':
app = wx.App()
window = StatusWindow(None)
app.MainLoop()
在Linux上运行此代码时,我遇到了一个致命的IO错误11。此处有完整的错误日志: