How can i check if QMainWindow is fully loaded ?

[umen242]

but if i have some methods in my QMainWindow that are invoket after the ctor is invoket
and its drawing some GUI element , how can i know that all the window is painted to the screen?

[umen242]

Tobias Hunger : i meant on finish load when windows is shown on screen , i have some http requests that i invoking on the window ctor , and its delay the window from showing in the screen

[giesbert]

The window is show() on the screen after show is called.
Another way is to derive and implement showEvent().

[Scylla]

I think therfore is the polishEvent(). After this event the ui is fully constructed.

[umen242]

how can i use it ?

[Scylla]

Reimplement the event method and check if the event is the polishEvent.
@bool MainWindow::event(QEvent *event)
{
int returnValue = QWidget::event(event);

if (event->type() == QEvent::Polish)
{
QSize widgetSize = this->size(); // store widget size
return true;
}

return returnValue;
}@

[umen242]

thanks for the answers

[SeedOfLife]

I had a similar problem and I used a QTimer::singleshot() with a timeout of 0 seconds. So my timer event was the first to fire after the app was in event loop (i.e. u can safely assume the app was loaded and was being displayed to the user ).

[goetz]

showEvent() is the right place to do these things.

Don't forget to remember that you've initialized it in a bool member, otherwise you will re-initialize it every time your main window is shown again.

Sample:

@
void yourMainWindow::showEvent( QShowEvent *event )
{
// call whatever your base class is!
QDialog::showEvent( event );
if( event->spontaneous() )
return;

if(isInitialized)
    return;

// do your init stuff here

isInitialized = true;

}
@

Don't forget to set isInitialized to false in your constructor!

[umen242]

ok thanks for helping

[ulesQt]

[quote author="Volker" date="1307434864"]showEvent() is the right place to do these things.

Don't forget to remember that you've initialized it in a bool member, otherwise you will re-initialize it every time your main window is shown again.

Sample:

@
void yourMainWindow::showEvent( QShowEvent *event )
{
// call whatever your base class is!
QDialog::showEvent( event );
if( event->spontaneous() )
return;

if(isInitialized)
    return;

// do your init stuff here

isInitialized = true;

}
@

Don't forget to set isInitialized to false in your constructor![/quote]

I used code like this to ask the user if wants to load the last played song using a QMessageBox,
but the question is shown before the main window. How could I know when the main window is completely visible?

Tnxs!!!