Hazen, All,
reaalythanks for your hel, it works for me !
thanks to these example i can explore it
to learn more about thread, pyQt and programming in general!
i'll give a deep look in QtAssistant too
i'l try to "translate" what can i read for c++ (is a bit hard for a
"non programmer")
and compare the class and methods used to in your python-code.
.
really thanks for the help !!!
have good Q-time :-)
Massimo Di Stefano
[email protected]
epifanio on irc.freenode.net /join gfoss
Il giorno 06/apr/09, alle ore 00:04, Hazen Babcock ha scritto:
Arnold Krille wrote:
On Sunday 05 April 2009 21:29:44 Hazen Babcock wrote:
I'd suggest expanding your MyThread class to something like this:
class MyThread(QtCore.QThread):
def __init__(self, parent = None):
QtCore.QThread.__init__(self, parent)
self.running = 1
def run(self):
n = 0
step = 1
while self.running:
n += step
print n
self.msleep(100)
def stop(self):
self.running = 0
You should also look at the QtCore.QMutex() class, which provides
a way
to synchronize (via locking) between the thread process and other
processes.
Another reason while this will not work as expected is the Big
Intepreter Lock. Unless QThread releases the BIL in its *sleep-
functions, the thread will block the execution of the main-thread...
Arnold
Yeah that wasn't such a good suggestion. I actually tested this one
and it works as expected for me:
import sys
from PyQt4 import QtCore, QtGui
import time
class MyThread(QtCore.QThread):
def __init__(self, parent = None):
QtCore.QThread.__init__(self, parent)
self.alive = 1
self.running = 0
self.n = 0
def run(self):
while self.alive:
step = 1
n = 0
while self.running:
n += step
print n
self.msleep(100)
self.msleep(100)
def toggle(self):
if self.running:
self.running = 0
else:
self.running = 1
def stop(self):
self.alive = 0
class Gui(QtGui.QWidget):
def __init__(self, parent=None):
QtGui.QGroupBox.__init__(self, parent)
self.gcenter = QtGui.QPushButton("X", self)
self.gcenter.setAutoRepeat(True)
guiLayout = QtGui.QGridLayout()
guiLayout.addWidget(self.gcenter,1,0)
self.setLayout(guiLayout)
self.thread = MyThread()
self.thread.start()
self.connect(self.gcenter, QtCore.SIGNAL("clicked()"),
self.thread.toggle)
if __name__ == "__main__":
app = QtGui.QApplication(sys.argv)
gui = Gui()
gui.show()
sys.exit(app.exec_())
I assume that QThread must be releasing the GIL while sleeping.
-Hazen
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