How to re-scale or changing the size of a QGrapicsScene

[Lykurg]

You can't do much when to positions are that close. You only can zoom in. use a cosmetic painter that the text and circle doesn't change their size.

EDIT: see QPen::setCosmetic().

[KristianKarl]

Actually, I found a solution using an article that I found here at QtCentre: Smooth Panning and Zooming

From that article I wrote:

void Layout::FitNetworkInView() {
    //Get the rectangle of the visible area in scene coords
    QRectF visibleArea = mapToScene( rect() ).boundingRect();
 
    //Get map area
    QRectF r = myMap->GetMapRect();
 
    //Scale the view
    qreal scaleFactor = qMin( qAbs( visibleArea.width() / r.width() ), qAbs( visibleArea.height() / r.height() ) );
    scaleFactor *= 0.9;
    if ( scaleFactor > 0 ) {
      scale( scaleFactor, scaleFactor );
    } else {
      scale( 1.0 / scaleFactor, 1.0 / scaleFactor );
    }
    SetCenter( r.center() );
  }

void Layout::FitNetworkInView() {
    //Get the rectangle of the visible area in scene coords
    QRectF visibleArea = mapToScene( rect() ).boundingRect();

    //Get map area
    QRectF r = myMap->GetMapRect();

    //Scale the view
    qreal scaleFactor = qMin( qAbs( visibleArea.width() / r.width() ), qAbs( visibleArea.height() / r.height() ) );
    scaleFactor *= 0.9;
    if ( scaleFactor > 0 ) {
      scale( scaleFactor, scaleFactor );
    } else {
      scale( 1.0 / scaleFactor, 1.0 / scaleFactor );
    }
    SetCenter( r.center() );
  }

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Calling the function above will nicely fit my sites within the viewport.
/Kristian