PyQt Qthread 输出到textBrowser

from PyQt4.QtCore import *

from PyQt4.QtGui import *

from PyQt4 import QtGui, QtCore

import sys, subprocess, time

class myThread(QtCore.QThread):

    def __init__(self):

        QtCore.QThread.__init__(self)

         

    def run(self):

        self.pipe = subprocess.Popen('ping 127.0.0.1', stdout=subprocess.PIPE)

        while self.pipe.poll() == None:

            self.emit(QtCore.SIGNAL("getLog(QString)"), QtCore.QString.fromUtf8((self.pipe.stdout.readline().rstrip())))

            time.sleep(0.2)

        restInfo = self.pipe.stdout.readlines()

        if len(restInfo):

            for line in restInfo:

                self.emit(QtCore.SIGNAL("writeLog(QString)"), QtCore.QString.fromUtf8((line.rstrip())))

class MainWindow(object):

    def __init__(self, Dialog):

        self.bt = QtGui.QWidget(Dialog)

        Dialog.setMinimumWidth(400)

        Dialog.setMinimumHeight(300)

        self.button = QtGui.QPushButton(self.bt)

        self.button.setText('Start')

        self.button_2 = QtGui.QPushButton(self.bt)

        self.button_2.setText('Stop')

        self.text = QtGui.QPlainTextEdit(self.bt)

        self.text.setFont(QtGui.QFont('Courier New', 10))

        self.verticalLayout = QtGui.QVBoxLayout(Dialog)

        self.verticalLayout.addWidget(self.button)

        self.verticalLayout.addWidget(self.button_2)

        self.verticalLayout.addWidget(self.text)

         

        self.th1 = myThread()

        QtCore.QObject.connect(self.th1, QtCore.SIGNAL("getLog(QString)"), self.writeLog)

        QtCore.QObject.connect(self.button, QtCore.SIGNAL('clicked()'), self.run)

        QtCore.QObject.connect(self.button_2, QtCore.SIGNAL('clicked()'), self.stop)

     

    def run(self):

        self.th1.start()

     

    def stop(self):

        self.th1.pipe.terminate()

     

    def writeLog(self, str):

        self.text.appendPlainText(str)

     

app = QtGui.QApplication(sys.argv)

dlg = QtGui.QDialog()

main = MainWindow(dlg)       

dlg.show()

sys.exit(app.exec_())