[Qt-interest] How Qt Event loop and Qthread mechanism works!

[Santhosh Y]

Hi,

This mail is regarding the how the event loop will work in a GUI Thread 
(Main thread) and in the Worker Thread.

Following is my understanding:

   1. For a GUI project we create a QApplication and we say exec() to
      start a event loop. This event loop maintains the list of event
      and dispatches to the receivers depending on the priority.
   2. When we create a thread by subclassing QThread , we can say exec()
      on thread to start its own event loop. (OR) We can emit signals in
      this subclass and we can catch it in the GUI thread for acting to
      the call.
   3. One can manually post events to any object in any thread at any
      time using the thread-safe function QCoreApplication::postEvent
      <qcoreapplication.html#postEvent>(). The events will automatically
      be dispatched by the event loop of the thread where the object was
      created.

Is my understanding correct?  Can anybody suggest me how can I better 
understand the  Qt event loop structure.
How the Qt infrastructure for this event loop works?

Any help is appreciated.

Regards
Santhosh

-- 

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Y Santhosh Kumar
Senior Software Engineer
SoftJin Technologies Private Limited
Unit No. 102, Mobius Tower,
I Floor, SJR I - Park,
EPIP, White Field,
Bangalore - 560066, India
U : www.softjin.com
E : santhosh at softjin.com
T : +91-80-41779999
M : +91-9740535265
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