python - PyQt4 如何通过单击按钮使用多处理

Question

我一直在尝试使用多进程运行命令，因为在使用 while 循环时 GUI 会卡住。我需要调用 pyqt4 类中的函数。或者更好的处理多进程的方法 Qthread 会帮助我吗？我已经搜索了很多教程，但我不知道该怎么做。

我试过了，效果不错。问题是我无法将 QeditText 的输入传递给该函数，如果有办法的话，它会为我想做的事情工作。

import sys
import multiprocessing
import time
from PyQt4 import QtCore, QtGui
from form import Ui_Dialog


def worker():
    t = MyDialog()
    name = multiprocessing.current_process().name
    print name, 'Starting',  t.self.ui.rtmpIN.toPlainText()
    time.sleep(2)
    print name, 'Exiting'

class MyDialog(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.ui = Ui_Dialog()
        self.ui.setupUi(self)
        self.ui.startButton.clicked.connect(self.start)
        self.ui.stopButton.clicked.connect(self.stop)
        self.ui.comboBox.addItem("player 1")
        self.ui.comboBox.addItem("player 2")
        self.ui.comboBox.addItem("player 3")
        #self.ui.comboBox.currentIndexChanged.connect(self.selectionchange)

    def selectionchange(self,i):
        print self.ui.comboBox.currentText()

    def start(self):
        worker_2 = multiprocessing.Process(target=worker)  # use default name
        worker_2.start()
        print "in:  ", self.ui.rtmpIN.toPlainText()
        print "out: ", self.ui.outPUT.toPlainText()
        print str(self.ui.comboBox.currentText())

        if self.ui.quialityBox.isChecked():
            q = "Streaming started" + "\n" + "quality: " + self.ui.Setquality.toPlainText() + "\n" + "player: " + str(self.ui.comboBox.currentText())
            self.ui.theLog.append(q)
            #print self.ui.Setquality.toPlainText()
        else:
            p = "Streaming" + "\n" + "player: " + str(self.ui.comboBox.currentText()) + "\n"
            self.ui.theLog.append(p)

    def stop(self):
        print 'stop pressed.'
        self.close()




if __name__ == "__main__":
        app = QtGui.QApplication(sys.argv)
        myapp = MyDialog()
        myapp.show()
        sys.exit(app.exec_())

我需要能够从中获取数据，在辅助函数中，有什么办法吗？

print "in:  ", self.ui.rtmpIN.toPlainText()
print "out: ", self.ui.outPUT.toPlainText()

编辑:忘记了这里的 form.py http://pastebin.com/HksuSjkt

Answer 1

这是我的解决方案:

from PyQt4.QtCore import QThread

class Worker(QThread):
    def __init__(self, parent=None):
        super(Worker, self).__init__(parent)
        self.textin = ""
        self.textout = ""
        self.okay = True

    def setTextIn(self, text):
        self.textin = text

    def setTextOut(self, text):
        self.textout = text

    def run(self):
        while self.okay:
            print('IN:' + self.textin)
            print('OUT:' + self.textout)
            time.sleep(2)

    def stop(self):
        self.okay = False


class MyDialog(QtGui.QDialog):
    def __init__(self, parent=None):
        QtGui.QWidget.__init__(self, parent)
        self.worker = Worker(self)
        self.ui = Ui_Dialog()
        self.ui.setupUi(self)
        self.ui.rtmpIN.textChanged.connect(self.changeText)
        self.ui.outPUT.textChanged.connect(self.changeText)
        self.ui.startButton.clicked.connect(self.start)
        self.ui.stopButton.clicked.connect(self.stop)
        self.ui.comboBox.addItem("player 1")
        self.ui.comboBox.addItem("player 2")
        self.ui.comboBox.addItem("player 3")

    def selectionchange(self,i):
        print(self.ui.comboBox.currentText())

    def start(self):
        self.worker.start()
        print("in:  "+self.ui.rtmpIN.toPlainText())
        print("out: "+self.ui.outPUT.toPlainText())
        print(self.ui.comboBox.currentText())

        if self.ui.quialityBox.isChecked():
            q = "Streaming started" + "\n" + "quality: " + self.ui.Setquality.toPlainText() + "\n" + "player: " + str(self.ui.comboBox.currentText())
            self.ui.theLog.append(q)
        else:
            p = "Streaming" + "\n" + "player: " + str(self.ui.comboBox.currentText()) + "\n"
            self.ui.theLog.append(p)

    def changeText(self):
        self.worker.setTextIn(self.ui.rtmpIN.toPlainText())
        self.worker.setTextOut(self.ui.outPUT.toPlainText())

    def stop(self):
        self.worker.stop()
        self.worker.quit()
        self.worker.wait()
        print('stop pressed.')
        self.close()

    def closeEvent(self, event):
        self.worker.stop()
        self.worker.quit()
        self.worker.wait()
        QtGui.QDialog.closeEvent(self, event)


if __name__ == "__main__":
        app = QtGui.QApplication(sys.argv)
        myapp = MyDialog()
        myapp.show()
        sys.exit(app.exec_())

输出: