Minimize to system tray

[aLiNuSh]

Hi,

I have a subclassed QDialog and I implemented a QSystemTrayIcon for it, with some Show/Hide options.
What I want to do is to minimize the window to the tray when the minimize button is clicked. I managed to do it for the close button by reimplementing QDialog::closeEvent () but I want to do it for the minimize button.

So any solutions?

Thanks

[marcel]

You can use QWindowStateChangeEvent, and look at the current window state. This event must be handled in the event() function of your dialog.

Regards.

[aLiNuSh]

You can use QWindowStateChangeEvent, and look at the current window state. This event must be handled in the event() function of your dialog.

Regards.

So I could do something like...

void MyDialog::event (QEvent * event)
{
      // i have no idea what i should write here, maybe like...
      QWindowStateChangeEvent *qwsc_event = event;
      Qt::WindowStates flag = qwsc_event->oldState ();      
}

void MyDialog::event (QEvent * event)
{
      // i have no idea what i should write here, maybe like...
      QWindowStateChangeEvent *qwsc_event = event;
      Qt::WindowStates flag = qwsc_event->oldState ();      
}

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[marcel]

void MyDialog::event( QEvent *e )
{
     if( e->type() ==  QEvent::WindowStateChange )
     {
         //Now check to see if the window is minimised
         if( isMinimised() )
            //Do something here (show the icon in the systray )
     }
}

void MyDialog::event( QEvent *e )
{
     if( e->type() ==  QEvent::WindowStateChange )
     {
         //Now check to see if the window is minimised
         if( isMinimised() )
            //Do something here (show the icon in the systray )
     }
}

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Should work

Edit:
don't do a dynamic cast at every event, instead check the event type

[aLiNuSh]

void MyDialog::event( QEvent *e )
{
     if( e->type() ==  QEvent::WindowStateChange )
     {
         //Now check to see if the window is minimised
         if( isMinimised() )
            //Do something here (show the icon in the systray )
     }
}

void MyDialog::event( QEvent *e )
{
     if( e->type() ==  QEvent::WindowStateChange )
     {
         //Now check to see if the window is minimised
         if( isMinimised() )
            //Do something here (show the icon in the systray )
     }
}

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Should work

Edit:
don't do a dynamic cast at every event, instead check the event type

OK I will try it, but shouldn't I do something like forward the other events? How would I do that... like when an event is not a WindowStateChange how would I forward it for default processing? Should I do something like...

void MyDialog::event( QEvent *e )
{
     if( e->type() ==  QEvent::WindowStateChange )
     {
         //Now check to see if the window is minimised
         if( isMinimised() )
         {
            hide ();
            e->ignore ();
         }
     }
     else e->accept ();
}

void MyDialog::event( QEvent *e )
{
     if( e->type() ==  QEvent::WindowStateChange )
     {
         //Now check to see if the window is minimised
         if( isMinimised() )
         {
            hide ();
            e->ignore ();
         }
     }
     else e->accept ();
}

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[marcel]

Sure .
It was just an on-the-fly example.
Of course you have to forward the other events.

Regards

[aLiNuSh]

Sure .
It was just an on-the-fly example.
Of course you have to forward the other events.

Regards

Well actually the function returns a bool so I did this:

bool MyInstantMessenger::event (QEvent *e)
{
	if(e->type() ==  QEvent::WindowStateChange)
    {
 
        //Now check to see if the window is minimised
        if (isMinimized())
        {
			e->accept ();
			hide ();
        }
		else e->ignore ();
		return true;
    }
	e->ignore ();
    return false;
}

bool MyInstantMessenger::event (QEvent *e)
{
	if(e->type() ==  QEvent::WindowStateChange)
    {
		
        //Now check to see if the window is minimised
        if (isMinimized())
        {
			e->accept ();
			hide ();
        }
		else e->ignore ();
		return true;
    }
	e->ignore ();
    return false;
}

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But this messes my application, like the widgets are not drawn and the QCloseEvent is not sent anymore. I also tried setting other combinations like ignoring the message instead of accepting it and returning false instead of true but that didn't either.

Would installEventFilter() work too? I'm looking in to it right now...

[jpn]

One should pass the events to the base class implementation. Also, it's recommended to reimplement more specialized QWidget::changeEvent() instead of QWidget::event().

void MyInstantMessenger::changeEvent (QEvent *e)
{
    if(e->type() ==  QEvent::WindowStateChange)
    {
        //Now check to see if the window is minimised
        if (isMinimized())
        {
            hide ();
        }
    }
    QDialog::changeEvent(e); // QDialog, or whatever the base class is
}

void MyInstantMessenger::changeEvent (QEvent *e)
{
    if(e->type() ==  QEvent::WindowStateChange)
    {
        //Now check to see if the window is minimised
        if (isMinimized())
        {
            hide ();
        }
    }
    QDialog::changeEvent(e); // QDialog, or whatever the base class is
}

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[marcel]

Yes, passing the ignored events to the base class will solve your problem.

[aLiNuSh]

That didn't help either
I also tried accepting and/or ignoring events and also didn't work, the window is still not hidden from the taskbar and the client area not painted.

[marcel]

bool MyInstantMessenger::event (QEvent *e)
      {
          if(e->type() ==  QEvent::WindowStateChange)
          {
              //Now check to see if the window is minimised
              if (isMinimized())
              {
                  hide ();
              }
          }
          return QDialog::event( e );
      }

bool MyInstantMessenger::event (QEvent *e)
      {
          if(e->type() ==  QEvent::WindowStateChange)
          {
              //Now check to see if the window is minimised
              if (isMinimized())
              {
                  hide ();
              }
          }
          return QDialog::event( e );
      }

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]

Is this what you did?

EDIT: This is what you need to do. You have to let QDialog handle the change event. You must not accept nor ignore the event. Just hide your window.

regards

[sheeeng]

That didn't help either
I also tried accepting and/or ignoring events and also didn't work, the window is still not hidden from the taskbar and the client area not painted.

I faced the same problem.

Anyone has a solution to these issues?

Thanks in advance.