使用线程在 wxPython 中持续更新 GUI 的好方法？

Question

我正在 Windows 7 操作系统上使用 python v2.7 和 wxPython v3.0 开发一个 GUI 应用程序。 我必须不断更新我的 GUI，其中包含很多面板。每个面板都包含一个wx.StaticText。我必须不断更新这些wx.StaticTexts。我想过使用threads。我还使用pubsub 模块与GUI 通信以更新这些wx.StaticTexts。每件事都按预期工作。 我在下面创建了一个关于我的真正问题的简短演示。

问题：在我下面的代码中，创建了两个线程。两个线程都可以使用wx.CallAfter() 更新 GUI。如果我有 100 个面板要更新怎么办？我是否需要为每个更新特定面板的线程创建 100 个类？我希望线程独立于其他线程工作。 还有什么比这个更好的方法？

代码：请在下面找到示例代码来玩：

import wx
from wx.lib.pubsub import setupkwargs
from wx.lib.pubsub import pub
import time
from threading import Thread
import threading

class GUI(wx.Frame):
    def __init__(self, parent, id, title):
        screenWidth = 500
        screenHeight = 400
        screenSize = (screenWidth,screenHeight)
        wx.Frame.__init__(self, None, id, title, size=screenSize)
        self.locationFont = locationFont = wx.Font(12, wx.MODERN, wx.NORMAL, wx.BOLD)
        mainSizer = wx.BoxSizer(wx.VERTICAL)
        myPanelA = wx.Panel(self, style=wx.SIMPLE_BORDER)
        myPanelA.SetBackgroundColour('#C0FAE0')
        self.myTextA = wx.StaticText(myPanelA, -1, "I have a problem :( ")
        myPanelB = wx.Panel(self, style=wx.SIMPLE_BORDER)
        myPanelB.SetBackgroundColour('#C0FAFF')
        self.myTextB = wx.StaticText(myPanelB, -1, "Me too :( ")
        mainSizer.Add(myPanelA, 1, wx.EXPAND, 5)
        mainSizer.Add(myPanelB, 1, wx.EXPAND, 5)
        self.SetSizer(mainSizer)
        pub.subscribe(self.updatePanelA, 'Update-panelA')
        pub.subscribe(self.updatePanelB, 'Update-panelB')

    def updatePanelA(self, message):
        self.myTextA.SetLabel(message)

    def updatePanelB(self, message):
        self.myTextB.SetLabel(message)

class threadA(Thread):
    def __init__(self):
        Thread.__init__(self)
        self.start()
    def run(self):
        ObjA = updateGUI()
        ObjA.methodA()

class threadB(Thread):
    def __init__(self):
        Thread.__init__(self)
        self.start()
    def run(self):
        ObjB = updateGUI()
        ObjB.methodB()

class updateGUI():
    def methodA(self):
        while True:
            time.sleep(3)
            wx.CallAfter(pub.sendMessage, 'Update-panelA', message='Problem solved')
    def methodB(self):
        while True:
            time.sleep(5)
            wx.CallAfter(pub.sendMessage, 'Update-panelB', message='Mine too')

if __name__=='__main__':
    app = wx.App()
    frame = GUI(parent=None, id=-1, title="Problem Demo")
    frame.Show()
    threadA()
    threadB()
    app.MainLoop()

感谢您的宝贵时间！

Answer 1

您可以定义您的私有“selfUpdatePanel”来启动它自己的线程来更新它自己的文本字段。以这种方式，代码将很容易维护。

检查以下根据您的代码修改的代码：

import wx
from wx.lib.pubsub import setupkwargs
from wx.lib.pubsub import pub
import time
from threading import Thread
import threading


class selfUpdatePanel(wx.Panel):
    def __init__(self, parent, mystyle, interval, topic, message):
        wx.Panel.__init__(self, parent, style = mystyle)
        pub.subscribe(self.updatePanel, topic)
        self.updateMsg = message
        self.textCtrl = None
        self.interval = interval
        self.topic = topic
        pub.subscribe(self.updatePanel, self.topic)

    def setTextCtrl(self,text):
        self.textCtrl = text

    def updatePanel(self):
        self.textCtrl.SetLabel(self.updateMsg)

    def threadMethod(self):
        while True:
            print "threadMethod"
            time.sleep(self.interval)
            wx.CallAfter(pub.sendMessage, self.topic)

    def startThread(self):
        self.thread = Thread(target=self.threadMethod)
        self.thread.start()


class GUI(wx.Frame):
    def __init__(self, parent, id, title):
        screenWidth = 500
        screenHeight = 400
        screenSize = (screenWidth,screenHeight)
        wx.Frame.__init__(self, None, id, title, size=screenSize)
        self.locationFont = locationFont = wx.Font(12, wx.MODERN, wx.NORMAL, wx.BOLD)
        mainSizer = wx.BoxSizer(wx.VERTICAL)
        #myPanelA = wx.Panel(self, style=wx.SIMPLE_BORDER)

        myPanelA = selfUpdatePanel(self, wx.SIMPLE_BORDER, 3, 'Update-panelA', 'Problem solved')
        myPanelA.SetBackgroundColour('#C0FAE0')
        self.myTextA = wx.StaticText(myPanelA, -1, "I have a problem :( ")
        myPanelA.setTextCtrl(self.myTextA)

        #myPanelB = wx.Panel(self, style=wx.SIMPLE_BORDER)
        myPanelB = selfUpdatePanel(self, wx.SIMPLE_BORDER, 5, 'Update-panelB', 'Mine too')
        myPanelB.SetBackgroundColour('#C0FAFF')
        self.myTextB = wx.StaticText(myPanelB, -1, "Me too :( ")
        myPanelB.setTextCtrl(self.myTextB)
        mainSizer.Add(myPanelA, 1, wx.EXPAND, 5)
        mainSizer.Add(myPanelB, 1, wx.EXPAND, 5)
        self.SetSizer(mainSizer)

        myPanelB.startThread()
        myPanelA.startThread()


if __name__=='__main__':
    app = wx.App()
    frame = GUI(parent=None, id=-1, title="Problem Demo")
    frame.Show()
    app.MainLoop()