[PyKDE] QFileDialog blocks QThread?

[Sok Ann Yap]

Running the following PyQt script, whenever I click the Open button,
the QThread will be stopped until I close the file dialog. The
equivalent code in C++ has no such problem.

# thread.py
import sys, time, random
from qt import *

class MyThread(QThread):
  def __init__(self, receiver):
    QThread.__init__(self)
    self.receiver = receiver
    self.stopped = 0

  def run(self):
    rand = random.Random()
    while not self.stopped:
      time.sleep(1)
      num = rand.random()
      print num
      event = QCustomEvent(10000)
      event.setData("%f" % (num,))
      QThread.postEvent(self.receiver, event)

  def stop(self):
    self.stopped = 1

class MainWindow(QMainWindow):
  def __init__(self, *args):
    QMainWindow.__init__(self, *args)
    self.toolbar = QToolBar(self)
    self.openbutton = QToolButton(self.toolbar)
    self.openbutton.setTextLabel("Open")
    self.openbutton.setUsesTextLabel(True)
    self.textedit = QTextEdit(self)
    self.setCentralWidget(self.textedit)
    self.thread = MyThread(self)
    self.thread.start()
    
    self.connect(self.openbutton, SIGNAL("clicked()"), self.open)
      
  def __del__(self):
    self.thread.stop()
    if not self.thread.finished():
      self.thread.wait()

  def customEvent(self,event):
    if event.type() == 10000:
      self.textedit.append(event.data())

  def open(self):
    QFileDialog.getOpenFileNames()


app = QApplication(sys.argv)
mw = MainWindow()
app.setMainWidget(mw)
mw.show()
sys.exit(app.exec_loop())