Application Output - End button Not Disable

[Meenu]

Hi,

I was created QDialog for capture camera data. Its working good. i have doubt on,

1. Just Application Run & End :OK
   Build-> Run-> Application open -> clicked close button from top right corner -> Dialog closed -> QT Creator's Application end button disabled perfectly [/home/Proj/build/Test exited with code 0].

2. Application Run with Camera data capture process & End : PROBLEM
   Build-> Run-> Application open ->Start Capture -> Stop Capture -> clicked close button from top right corner -> Dialog closed -> QT Creator's Application end button Still Enabled [Starting /home/Proj/build/Test... - here not exited with code 0].

What is the reason?
How can i recover from this problem?

[kshegunov]

@Meenu
Probably your application hangs on exit. Break the execution (use the pause button in the debug view) when that happens (case 2) and extract a stack trace to see where the problem might lie.

Kind regards.

[Meenu]

@kshegunov
No hanging problem while exit.
So i like to print the message using qDebug().

Dialog::~Dialog()
{
    if(startcapture)  on_StopCapture();
    delete ui;
    qDebug() << "deleted ui";
}

Dialog open and Close (No Data Capture Process):
Starting /home/Proj/build/Test...
deleted ui
/home/Proj/build/Test exited with code 0

Dialog open with Data Capture Process then close:
Starting /home/Proj/build/Test...
Start Capture
End Capture
deleted ui
Note: After calls destructor function, More then 60 to 100 seconds taken to end the application normally like - /home/Proj/build/Test exited with code 0

What is the reason?

[JKSH]

Hi @Meenu,

Please show us the code on how you start and stop the camera

[Meenu]

used timer concept to capture camera data.

void timer_handler(void)
{     
    StartAcquisition();  
}
void Dialog::on_StartCapture()//button clicked
{ 
  if(start_timer(1000, &timer_handler))
  {
    printf("\n timer error\n");
  }
}
void Dialog::on_StopCapture()//button clicked
{        
    stop_timer();
    StopAcquisition();
}

I have one more problem.
I like to use more than one timer in my application using this timer concept. I tired but single timer only execute(which one is last defined). Kindly clear me.