plasmoid geometry event

[Toussis Manolis]

I have a plasmoid that is free-aspect-ratio when on desktop
but when it is on a panel , I want to have a 2.4 ratio
I tried this:

void PlasmaTvGr::constraintsEvent(Plasma::Constraints constrains)
{
    if(formFactor()==Plasma::Planar)
    {
      setMinimumSize(80,48);
    };
    if(formFactor()==Plasma::Horizontal)
    {
      kDebug()<<"contsRecH:"<<geometry().height();
      setMinimumSize(geometry().height()*2.4,geometry().height());
      setMaximumSize(geometry().height()*2.4,geometry().height());
    };
    if(formFactor()==Plasma::Vertical)
    {
      
    };
    calculateSizes(contentsRect().toRect());
    updateGeometry();
}

but it ignores any geometry resize... any help?