How to implement Zoom Extents using QT

Hello,
Please help me to implement Zoom Extents ?
Thanks in advance.

--Neha

Would be helpful to know what Zoom Extents is or what it is supposed to do.

Cheers,
_

Zoom Extents tool to zoom your view to a distance which makes the whole model visible and centered in the drawing area, irrespective of scale....

--Neha

View as in QAbstractItemView or QGraphicsView?

Cheers,
_

View in QGraphicsView..

--Neha

QGraphicsView::scale