On 17 Mrz., 11:29, Thomas Perl <[email protected]> wrote:
> 2011/3/17 Markus Hubig <[email protected]>:
>
> > 2. QObject::setParent: Cannot set parent, new parent is in a different
> > thread
>
> > Msg 1 appears when I start the application. Msg 2 when I press the
> > start Button.
> > But the application is running fine. While msg 1 is surely something
> > related to
> > the multi inheritance in my application but what's the course of Msg
> > 2?
>
> You pass "self" as the first parameter in this part of your code:
>
> > def _state_machine(self):
> > machine = QtCore.QStateMachine(self)
>
> And "_state_machine" is run in a different thread (the one you
> created; the other one is the implicit main thread of execution of the
> application). Message 2 is pretty clear there. To avoid the error,
> don't set the QStateMachine as child (by not passing "self" as the
> first parameter). If you do this, however, the state machine doesn't
> become a child of the object (obviously), but you need to keep a
> reference to it so it doesn't get destroyed when it falls out of
> scope. You can do this by having in the __init__ method of your
> MainWindow:
>
> self._machine = None
>
> And then in the _state_machine function:
>
> self._machine = QtCore.QStateMachine()
Yeah! I finally got it working without errors! ;-)
--------------------8<----schnipp
(trime.py)------------------------------
import platform
from PySide import QtCore
from PySide import QtGui
from ui_trimeibt import Ui_mainWindow
from statemachine import StateMachine
__version__ = '0.0.1'
class MainWindow(QtGui.QMainWindow, Ui_mainWindow):
def __init__(self, parent=None):
super(MainWindow, self).__init__(parent)
self.setupUi(self)
self._progress = 0
self._running = False
self.startButton.clicked.connect(self._start_machine)
self.machine = StateMachine()
self.machine.on_progress.connect(self._update_progressbar)
self.machine.finished.connect(self._reset_progressbar)
def _update_progressbar(self):
self.progressBar_DUT1.setValue(self.machine.progress)
def _reset_progressbar(self):
print "RESET"
self.progressBar_DUT1.reset()
def _start_machine(self):
self.machine.start()
if __name__ == '__main__':
import sys
app = QtGui.QApplication(sys.argv)
frame = MainWindow()
frame.show()
app.exec_()
--------------------8<----schnapp (trime.py)
---------------------------------
--------------------8<----schnipp
(statemachine.py)---------------------------
import time
import platform
from PySide import QtCore
from PySide import QtGui
class StateMachine(QtCore.QThread):
def __init__(self, parent=None):
super(StateMachine, self).__init__(parent)
self._progress = 0
def run(self):
machine = QtCore.QStateMachine()
prepare = QtCore.QState()
prepare.entered.connect(self.prepare_dut())
flash = QtCore.QState()
flash.entered.connect(self.flash_dut())
config = QtCore.QState()
config.entered.connect(self.config_dut())
finish = QtCore.QFinalState()
finish.entered.connect(self.finish_dut())
prepare.addTransition(flash)
flash.addTransition(config)
config.addTransition(finish)
machine.addState(prepare)
machine.addState(flash)
machine.addState(config)
machine.addState(finish)
machine.setInitialState(prepare)
machine.start()
def prepare_dut(self):
print "State 1: Prepare DUT"
self.progress = 20
time.sleep(1)
def flash_dut(self):
print "State 2: Flash DUT"
self.progress = 50
time.sleep(1)
def config_dut(self):
print "State 3: Config DUT"
self.progress = 70
time.sleep(1)
def finish_dut(self):
print "State 4: DUT finished!"
self.progress = 100
time.sleep(1)
def _get_progress(self):
return self._progress
def _set_progress(self, progress):
self._progress = progress
self.on_progress.emit()
on_progress = QtCore.Signal()
progress = QtCore.Property(int, _get_progress, _set_progress,
notify=on_progress)
--------------------8<----schnapp
(statemachine.py)---------------------------
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