Tk Text 小部件的 Twisted 和 Tkinter 问题

Question

我正在为扭曲的应用程序（服务器端）构建一个简单的 tkinter gui。下面的代码运行良好，除了当我想写入从扭曲（dataReceived 方法）发送的数据时，它会删除 Text 小部件内的所有先前消息并写入第一行。我想在该文本小部件中写入客户端消息而不删除其中包含的先前文本。

from Tkinter import *
from twisted.internet import reactor, tksupport
from twisted.internet.protocol import Protocol, Factory

class MultiEcho(Protocol):
    def __init__(self, factory):
        self.factory = factory

    def connectionMade(self,*args):
        self.factory.echoers.append(self)          


    def dataReceived(self, data):
        gettest = str(data)
        get = App()        
        get.write(gettest)          


    def connectionLost(self, reason):
       # self.factory.echoers.remove(self)
            pass

class MultiEchoFactory(Factory):
    def __init__(self):
        self.echoers = []


    def buildProtocol(self, addr):
        return MultiEcho(self)


class App(Frame):
    def write(self,text):
        message = str(text)        
        self.display.configure(state='normal')
        self.display.insert(END,message + '\n')
        self.display.configure(state='disabled')           


    def handle(self,event=None):
        msg = self.entry.get()
        self.entry.delete(0,END)

        self.write(msg + '\n')
        self.display.yview(END)

    def __init__(self,parent=None):
        Frame.__init__(self,parent)
        self.parent=parent
        self.initUI()


    def kill(self):        
        reactor.stop()
        self.quit()

    def initUI(self):        
        self.grid(row=0,sticky=N+E+S+W)
        self.columnconfigure(0,weight=1)
        self.rowconfigure(0,weight=1)
        self.display = Text(self)
        self.display.grid(row=0,sticky=N+E+S+W)
        self.yscroll = Scrollbar(self,command=self.display.yview)
        self.yscroll.grid(row=0,column=1,sticky=N+S)
        self.display.config(yscrollcommand=self.yscroll.set)
        self.entry = Entry(self)
        self.entry.grid(row=1,sticky=E+W)        
        self.entry.bind('<Return>',self.handle)
        self.master.protocol('WM_DELETE_WINDOW',self.kill)

def main():  
    root = Tk()
    ex = App(root)
    tksupport.install(root)
    mef = MultiEchoFactory()
    reactor.listenTCP(8000, mef)
    reactor.run()


if __name__ == '__main__':
    main()

请帮我解决这个问题。感谢您花时间阅读本文。

Answer 1

通过重复调用 App，您将在每次调用时生成一个新的 App 实例。

相反，您应该保留对在 main 中创建的 ex 的引用，并将其传递给 MultiEchoFactory.__init__，将其保存在 self，然后从 MultiEcho 做 self.app.write(...) 而不是 App().write(...).

Tk Text 小部件的 Twisted 和 Tkinter 问题

Twisted and Tkinter Issue with Tk Text widget

python

tkinter

twisted