Problem with return a.exec(). I need a solution here...

[hakermania]

Hello developers!



My application is both console and GUI, depending on the arguments it takes.

So, the code is as follows:

#include.....
 
//..
 
class EarthTimer (bla bla, making a subclass of QTimer....
 
   ..
   //here we connect the timer with the timers_slot() function
}
 
int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
EarthTimer earthtimer;
                earthtimer.start(1800000); //30 min
                return a.exec(); //we have started the timer but we have to call this otherwise the application will immediately close
 
 
}
 
void timers_slot(){
//doing some specific job
..//code
..
..
if(something_is_true){
   MainWindow w;
   w.show();
/*here I am trying to start the GUI, what it does is to go through the constructor
of the MainWindow class and then exits, without showing the GUI, I guess I have
to call return a.exec() again, but a is not declared here and cannot be global :(*/
}
}

#include.....

//..

class EarthTimer (bla bla, making a subclass of QTimer....

   ..
   //here we connect the timer with the timers_slot() function
}

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
EarthTimer earthtimer;
                earthtimer.start(1800000); //30 min
                return a.exec(); //we have started the timer but we have to call this otherwise the application will immediately close


}

void timers_slot(){
//doing some specific job
..//code
..
..
if(something_is_true){
   MainWindow w;
   w.show();
/*here I am trying to start the GUI, what it does is to go through the constructor
of the MainWindow class and then exits, without showing the GUI, I guess I have
to call return a.exec() again, but a is not declared here and cannot be global :(*/
}
}

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Ι think the comments are pretty specific, but if someone didn't get it:
I call return a.exec() after starting the timer so as to avoid program's quit, and then if something is true in the timers_slot() I am trying to open the GUI. It goes through the constructor of the GUI but it does not show anything. I assume I have to call return a.exec() again there but it is declared in main() function and cannot be global.
May I create another QApplication and return it there?