Hi guys im having kind of a headache understanding threads in Qt.
I`ve already read some post about QThread and the You are doing it blog entry but somehow I cant understand the full concep...
My idea is to show a loading widget while i load my application data. So far I ve the following code:

Qt Code: 
  1. #include <QtGui/QApplication>
  2.     #include <QObject>
  3.     #include "waitthread.h"
  4.     #include "loadthread.h"
  5.  
  6.     int main(int argc, char *argv[])
  7.     {
  8.         QApplication a(argc, argv);
  9.         QApplication::setStyle (new IconSize ());
  10.  
  11.         LoadThread * load_thread = new LoadThread ();
  12.         WaitThread * wait_thread = new WaitThread ();
  13.  
  14.         QObject::connect (load_thread, SIGNAL(load_finished()), wait_thread, SLOT(loading_finished()));
  15.  
  16.         load_thread->start ();
  17.         wait_thread->start ();
  18.  
  19.         return a.exec ();
  20.     }
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the loadthread.cpp:

Qt Code: 
  1. LoadThread::LoadThread()
  2.     {
  3.         mainWin = new MainWindow ();
  4.     }
  5.  
  6.     void LoadThread::run (){
  7.         //--------------------do some stuff
  8.         emit load_finished ();
  9.     emit load_finished ();
  10.     show_mainWin ();
  11. }
  12.  
  13. void LoadThread::show_mainWin (){
  14.     mainWin->show ();
  15. }
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And the waitThread.cpp

Qt Code: 
  1. #include "waitthread.h"
  2.  
  3.     WaitThread::WaitThread()
  4.     {
  5.         loadwidg = new LoadingWidget ();
  6.         loadwidg->show ();
  7.     }
  8.  
  9.     void WaitThread::run (){
  10.     }
  11.  
  12.     void WaitThread::loading_finished (){
  13.         loadwidg->close ();
  14.         delete loadwidg;
  15.         this->terminate ();
  16.     }
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I think that the signal is received because the loading widget is closed...but mainWin only pops up for a split sec, like the object Qthread is destroyed...I know that im designing this the wrong way...hope someone can give a hand to fully understand this...