How to achieve showAll ?

I'm doing an app based completely on GraphicsView. I need to implement a feature - showAll which on enabling should scale view such that all items are visible (criteria being scale factor should be as high as possible).
My initial approach is this

Code:

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void SchematicView::showAll()
{
   QRectF intersect;
   QList<QGraphicsItem*> _items = items();
   if ( !_items.isEmpty() ) {
      intersect = _items.first()->sceneBoundingRect();
      foreach( QGraphicsItem* it, _items ) {
         intersect |= it->sceneBoundingRect();
      }
      intersect.adjust( -10, -10, 10, 10);
      fitInView( intersect, Qt::KeepAspectRatio );
   }
}

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But somehow this method doesn't show all items. Some items are half shown . Can anyone help me ?

Code:

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fitInView(scene()->itemsBoundingRect(), Qt::KeepAspectRatio);

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Quote:

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Originally Posted by wysota

Code:

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fitInView(scene()->itemsBoundingRect(), Qt::KeepAspectRatio);

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Thanks for the answer. But scene()->itemsBoundingRect() does the same thing I'm doing now (OR'ing sceneBoundingRects). Unfortunately I still experience above said problems. :confused:

Problem solved!!! :p

The problem was with the size of scene rect. The scene rect was smaller than the viewport rect. After setting this right, it works without any problem. :)

what exactly did you do? you made the scene size equal or greater than the view size?

Equal. Setting it larger will cause the view to add scrollbars.