World View Zooming factor

Hello,

I firstly would like to introduce myself to you sinds I am a new comer in this discussion board. My name is Kaatja and am a software developer for a company in europe.

Now back to the business. We use QT-tookit in order to develope our GUI with it. But the programming language is C++. I am at this time busy making a world view interface(just like Google earth) see the below image.

http://img56.imageshack.us/my.php?image=79406270bm9.jpg

As i marked the small view at the right bottom corner of the view, I have also the same small view which has some drawing objects in it. And a big view which has also the same drawing objects as the small one.

When I select some area in the small view OnMouseRelease, I tend to zoom the same selected area in the bigger view. Can someone please give any idea how can I achieve this?

I have tried it myself too, and this is the code:

Code:

---

//class WorldView (the small view)
void WorldView::mouseReleaseEvent(QMouseEvent *e)
{
       
        dScale2 = 2.0;
        m_WorldViewSelect = false;
       
        int x = 0;
        int y = 0;
               
        if ( m_bSelect )
        {
                //The selected area draws in the form of rectangle
                SetSelect(0,0,0,0);
                m_Select = m_Select.normalize();
                       
                m_bSelect = false;
                x = -( m_Dev.Left() - ((m_Select.left() + m_Select.right())  / 2) );
                y = -( m_Dev.Top()  - ((m_Select.top()  + m_Select.bottom()) / 2) );
               
                QRect R = rect();
                       
                XFactor = (double)R.width()  / (double)m_Select.width();
                YFactor = (double)R.height() / (double)m_Select.height();
               
                if (XFactor > YFactor)
                        dScale2 = YFactor;
                else
                        dScale2 = XFactor;

                if (m_pOtherView->View())
                {
                        // if the other view the selected rectangle should be drawn in to the other view en aftwewards that selected area should be zoomed in
                       
                        m_Zoomed = true;
                        m_pOtherView->View()->SetSelect(m_Select.x(), m_Select.y(),
                                                        m_Select.width(), m_Select.height());
                       
                                m_pOtherView->View()->mouseReleaseEvent(e);
                       
                        // After doing this, the zoomfactor for the other view is not correct and the selected area(Rectangle) is not been drown in the good position.

                }       
                       
        }
}

---

Thank you!

Kaatja