self.Draw(dc)
class MyFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title="wx.Timer")
ClockWindow(self)
app = wx.PySimpleApp()
frm = MyFrame()
frm.Show()
app.MainLoop()
3. 使用多线程时你必须知道的：wx.CallAfter
在wxpython中编写多线程案例时特别需要注意，线程中通知窗口对象更新状态时，必须使用wx.CallAfter。同样是18章的例子：
import wx
import threading
import random
class WorkerThread(threading.Thread):
"""
This just simulates some long-running task that periodically sends
a message to the GUI thread.
"""
def __init__(self, threadNum, window):
threading.Thread.__init__(self)
self.threadNum = threadNum
self.window = window
self.timeToQuit = threading.Event()
self.timeToQuit.clear()
self.messageCount = random.randint(10,20)
self.messageDelay = 0.1 + 2.0 * random.random()
def stop(self):
self.timeToQuit.set()
def run(self):
msg = "Thread %d iterating %d times with a delay of %1.4fn"
% (self.threadNum, self.messageCount, self.messageDelay)
wx.CallAfter(self.window.LogMessage, msg)
for i in range(1, self.messageCount+1):
self.timeToQuit.wait(self.messageDelay)
if self.timeToQuit.isSet():
break
msg = "Message %d from thread %dn" % (i, self.threadNum)
wx.CallAfter(self.window.LogMessage, msg)
else:
wx.CallAfter(self.window.ThreadFinished, self)
class MyFrame(wx.Frame):
def __init__(self):
wx.Frame.__init__(self, None, title="Multi-threaded GUI")
