wxPython跨线程调用
版权所有，转载请注明出处：http://guangboo.org/2013/08/23/wxpython-non-gui-thread-call-gui-method
之前有介绍了《wxPython多线程支持》，包含了wx.CallAfter, wx.PostEvent, wxCallLater的用法，本文将wx.CallAfter封装成decorator，使得UI线程中的方法可以在非UI线程中调用。
本文将wx.CallAfter方法进行了封装，代码如下：
import wx
def call_after(func):
def _wrapper(*args, **kwargs):
return wx.CallAfter(func, *args, **kwargs)
return _wrapper
当UI线程中的方法需要被非UI线程调用时，只有使用call_after进行修饰即可。如下对《wxPython多线程》中的实例改进：
import time
import wx
from threading import Thread
from wx.lib.pubsub import Publisher
def call_after(func):
def _wrapper(*args, **kwargs):
return wx.CallAfter(func, *args, **kwargs)
return _wrapper
class MyForm(wx.Frame):
#----------------------------------------------------------------------
def __init__(self):
wx.Frame.__init__(self, None, wx.ID_ANY, "Tutorial")
# Add a panel so it looks the correct on all platforms
panel = wx.Panel(self, wx.ID_ANY)
self.displayLbl = wx.StaticText(panel, label="Amount of time since thread started goes here")
self.btn = btn = wx.Button(panel, label="Start Thread")
btn.Bind(wx.EVT_BUTTON, self.onButton)
sizer = wx.BoxSizer(wx.VERTICAL)
sizer.Add(self.displayLbl, 0, wx.ALL|wx.CENTER, 5)
sizer.Add(btn, 0, wx.ALL|wx.CENTER, 5)
panel.SetSizer(sizer)
self._thread = Thread(target = self.run, args = ())
self._thread.daemon = True
def run(self):
i = 0
while True:
i += 1
time.sleep(1)
self.updateDisplay('Seconds: %d' % i)
#----------------------------------------------------------------------
def onButton(self, event):
"""
Runs the thread
"""
self._thread.start()
self.started = True
self.displayLbl.SetLabel("Thread started!")
btn = event.GetEventObject()
btn.Disable()
@call_after
def updateDisplay(self, msg):
"""
Receives data from thread and updates the display
"""
self.displayLbl.SetLabel(msg)
#----------------------------------------------------------------------
# Run the program
if __name__ == "__main__":
app = wx.PySimpleApp()
frame = MyForm().Show()
app.MainLoop()
源代码下载：demo.py