Minimize to tray - crash

[mero]

Hi,

I need help, I want to minimize program to tray, and everything is ok but when program is minimized and messagebox (or any dialog/popup) shows program is quiting with Exited normally (?!) Tested on qt 4.7 and 4.8.
So how and what I need to change in this code ? Or maybe there is better solution for minimizing program ? (I need example of course)

void MainWindow::changeEvent(QEvent *event)
{
    QMainWindow::changeEvent(event);
 
    if (event->type() == QEvent::WindowStateChange)
    {
        QWindowStateChangeEvent *e = (QWindowStateChangeEvent*)event;
 
        if ((e->oldState() != Qt::WindowMinimized) && isMinimized())
        {
            if (Core::instance()->settings["minimize_to_tray"] == "on")
            {
                QTimer::singleShot(0, this, SLOT(hide()));
                event->ignore();
            }
        }
    }
}

void MainWindow::changeEvent(QEvent *event)
{
    QMainWindow::changeEvent(event);

    if (event->type() == QEvent::WindowStateChange)
    {
        QWindowStateChangeEvent *e = (QWindowStateChangeEvent*)event;

        if ((e->oldState() != Qt::WindowMinimized) && isMinimized())
        {
            if (Core::instance()->settings["minimize_to_tray"] == "on")
            {
                QTimer::singleShot(0, this, SLOT(hide()));
                event->ignore();
            }
        }
    }
}

To copy to clipboard, switch view to plain text mode