WxPython 界面利用pubsub与线程通讯
WxPython 4.0 以后不用wx.lib.pubsub 来做消息通讯了， 改用 pubsub ， 如果继续用 wx.lib.pubsub ， 会有以下警告提示：
>>> from wx.lib.pubsub import pub
Warning (from warnings module):
File "D:\Python\Python37\lib\site-packages\wx\lib\pubsub\__init__.py", line 25
wx.wxPyDeprecationWarning)
wxPyDeprecationWarning: wx.lib.pubsub has been deprecated, plese migrate your code to use pypubsub, available on PyPI.
>>>
pip install pypubsub
对照pubsub文档，原理一样，折腾改了代码，以下贡献个例子。
# encoding: utf-8
"""
@author: 陈年椰子
@contact: [email protected]
@version: 1.0
@file: wxpub.py
@time: 2019/6/13 0013 9:56
说明 WxPython 界面利用pubsub与线程通讯的例子
"""
import wx
from pubsub import pub
from time import sleep
import threading
import sys
# 耗时长的代码
def workproc():
sum_x = 0
for i in range(1, 101):
sum_x = sum_x + i
sleep(0.1)
pub.sendMessage("update", mstatus='计算{} , 合计 {}'.format(i, sum_x))
return sum_x
# 线程调用耗时长代码
class WorkThread(threading.Thread):
def __init__(self):
"""Init Worker Thread Class."""
threading.Thread.__init__(self)
self.start()
def run(self):
"""Run Worker Thread."""
pub.sendMessage("update", mstatus='workstart')
result = workproc()
sleep(2)
pub.sendMessage("update", mstatus='计算完成，结果 {}'.format(result))
pub.sendMessage("update", mstatus='workdone')
class MainFrame(wx.Frame):
"""
简单的界面
"""
def __init__(self, *args, **kw):
# ensure the parent's __init__ is called
super(MainFrame, self).__init__(*args, **kw)
# create a panel in the frame
pnl = wx.Panel(self)
# and put some text with a larger bold font on it
self.st = wx.StaticText(pnl, label="分析工具 V 2019", pos=(25,25))
font = self.st.GetFont()
font.PointSize += 5
font = font.Bold()
self.st.SetFont(font)
# create a menu bar
self.makeMenuBar()
# and a status bar
self.CreateStatusBar()
self.SetStatusText("启动完成!")
pub.subscribe(self.updateDisplay, "update")
def makeMenuBar(self):
"""
A menu bar is composed of menus, which are composed of menu items.
This method builds a set of menus and binds handlers to be called
when the menu item is selected.
"""
# Make a file menu with Hello and Exit items
fileMenu = wx.Menu()
# The "\t..." syntax defines an accelerator key that also triggers
# the same event
# helloItem = fileMenu.Append(-1, "&Hello...\tCtrl-H",
# "Help string shown in status bar for this menu item")
self.startItem = fileMenu.Append(-1, "开始",
"开始计算")
fileMenu.AppendSeparator()
self.exitItem = fileMenu.Append(-1, "退出",
"退出")
# Now a help menu for the about item
helpMenu = wx.Menu()
aboutItem = helpMenu.Append(-1, "关于",
"WxPython 界面与线程通讯的例子")
# Make the menu bar and add the two menus to it. The '&' defines
# that the next letter is the "mnemonic" for the menu item. On the
# platforms that support it those letters are underlined and can be
# triggered from the keyboard.
self.menuBar = wx.MenuBar()
self.menuBar.Append(fileMenu, "工作")
self.menuBar.Append(helpMenu, "信息")
# Give the menu bar to the frame
self.SetMenuBar(self.menuBar)
# Finally, associate a handler function with the EVT_MENU event for
# each of the menu items. That means that when that menu item is
# activated then the associated handler functin will be called.
self.Bind(wx.EVT_MENU, self.OnStart, self.startItem)
self.Bind(wx.EVT_MENU, self.OnExit, self.exitItem)
self.Bind(wx.EVT_MENU, self.OnAbout, aboutItem)
def OnExit(self, event):
"""Close the frame, terminating the application."""
self.Close(True)
sys.exit()
def OnStart(self, event):
self.work = WorkThread()
def OnAbout(self, event):
"""Display an About Dialog"""
wx.MessageBox("分析工具 v2019",
"关于",
wx.OK|wx.ICON_INFORMATION)
def updateDisplay(self, mstatus):
"""
Receives data from thread and updates the display
"""
if mstatus.find("workstart") >= 0:
self.SetStatusText('开始计算，代码不提供中断线程语句，请等待计算结束！')
self.startItem.Enable(False)
self.exitItem.Enable(False)
if mstatus.find("workdone") >= 0:
self.SetStatusText('完成！')
self.startItem.Enable(True)
self.exitItem.Enable(True)
else:
self.st.SetLabel(mstatus)
app = wx.App()
frm = MainFrame(None, title='分析工具')
frm.Show()
app.MainLoop()