[Qt-interest] QGraphicsScene problem

[Patric]

Can I operate on QGraphicsScene from different thread, not the main thread ? 
  ----- Original Message ----- 
  From: Scott Aron Bloom 
  To: qt-interest at trolltech.com 
  Sent: Saturday, August 29, 2009 11:21 AM
  Subject: Re: [Qt-interest] QGraphicsScene problem


  The timer is owned/constructed in one theread, and is being started/stoped by the worker thread.

   

  Try calling moveToThread to move the timers into the worker thread.

   

  Scott

   

  From: qt-interest-bounces at trolltech.com [mailto:qt-interest-bounces at trolltech.com] On Behalf Of Patric
  Sent: Saturday, August 29, 2009 1:11 AM
  To: qt-interest at trolltech.com
  Subject: [Qt-interest] QGraphicsScene problem

   

  Hello guys, 

  I have QGraphicsScene here with items on it. 

   

  I have manual control (i.e. keyboard events) and also auto control (through a thread which makes all the calculations where these QPixmapItems should interact). 

   

  When I control them, everything is OK. 

  But when I start the auto control, i.e. my thread which simulates the actions, I'm observing a very strange behaviour. It's a game actually, it's turn based. 

  So somethimes the objects on the board are just not moving on their turns. 

   

  I have implemented this simulation engine with the technique used in the Mandelbrot example. 

   

  In my MainWindow class I have instance of the engine thread, and when some button in the GUI is pressed MainWindow calls a method in the thread (directly), which wakes the thread. 

  And I'm getting this shit : 

   

  QObject::killTimer: timers cannot be stopped from another thread 

  QObject::startTimer: timers cannot be started from another thread

  QObject::killTimer: timers cannot be stopped from another thread

  QObject::startTimer: timers cannot be started from another thread

  QObject::killTimer: timers cannot be stopped from another thread

  QObject::startTimer: timers cannot be started from another thread

   

  Any ideas why ? 

   

  Regards, 

  Patric

   

  p.s.:in the end of the thread's run method there is sleep call also. 



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