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from PyQt4 import QtCore, QtGui
import time,sys
# vytvoreni mutexu
mutex=QtCore.QMutex()

class thread(QtCore.QThread):
	"""
	Thread, ktery co sekundu posune progress dialog o jeden stupen, dokud nebude na 100
	"""
	def __init__(self):
		QtCore.QThread.__init__(self,None)

	def run(self):
		"""
		Funkce, ktera je spustena po zapnuti threadu funkci start()
		"""
		# automaticke lockovani threadu pri praci s promennyma mimo tento thread
		locker = QtCore.QMutexLocker(mutex)
		i=0 # pocitadlo sekund
		while i!=1000:
			# ukonceni threadu pokud v progressDialogu zmenime promennou end na true
			if win.end==True:
				break
			time.sleep(0.1)
			i+=1
			# emitovani signalu, na ktery je progressDialog napojen
			self.emit(QtCore.SIGNAL("inc(int)"), i)

class progress(QtGui.QProgressDialog):
	"""
	Derivovana trida progress dialogu
	"""
	def __init__(self):
		"""
		Vytvori a spusti thread a progressDialog
		"""
		QtGui.QProgressDialog.__init__(self,"Test dialogu","Zrusit",0,1000)
		self.setWindowModality(QtCore.Qt.WindowModal)
		# signaly potrebne k ukonceni threadu pri uzavreni okna a kliknuti na tlacitko pro ukonceni dialogu
		QtCore.QObject.connect(app,QtCore.SIGNAL("lastWindowClosed() "),self._exit)
		QtCore.QObject.connect(self,QtCore.SIGNAL("canceled() "),self._exit)
		# vytvoreni threadu pomoci tridy thread()
		self.thread=thread()
		self.end=False
		# napojeni signalu pro zvednuti stavu progressbaru na fci progressDialogu setValue(int)
		QtCore.QObject.connect(self.thread, QtCore.SIGNAL("inc(int)"), self.setValue,QtCore.Qt.QueuedConnection)
		# zapnuti threadu
		self.thread.start()
	
	def _exit(self):
		"""
		Vypnuti threadu
		"""
		self.end=True
		self.thread.wait()
		app.quit()

app = QtGui.QApplication(sys.argv)
win=progress()
win.show()
sys.exit(app.exec_())