无边框对话框的缩放

LRESULT CDialogZoomDlg::OnNcHitTest(CPoint point)

{

         // TODO:  在此添加消息处理程序代码和/或调用默认值

         //无边框缩放

         //这里是防止在最大化的时候能缩放窗口(在没有WS_THICKFRAME风格的情况下需要这样处理下)

         if (IsZoomed())

         {

                   return CDialog::OnNcHitTest(point);

         }

 

         CRect rect;

         GetClientRect(&rect);

         CPoint pt = point;

         ScreenToClient(&pt);

         static int nFrame = 4; // 窗口边框的宽度

         rect.DeflateRect(nFrame, nFrame);

         CRect RectResize(rect.right - 20, rect.bottom - 20, rect.right, rect.bottom);

         // CRect rectTitle(nFrame,nFrame, rect.right - nFrame,CAPTION_HEIGHT);

         if (!rect.PtInRect(pt))

         {

                   if (pt.x <= nFrame && pt.y >= rect.bottom - nFrame)

                   {

                            return HTBOTTOMLEFT;

                   }

                   else if (pt.x <= nFrame && pt.y <= nFrame)

                   {

                            return HTTOPLEFT;

                   }

                   else if (pt.x >= rect.right - nFrame && pt.y <= nFrame)

                   {

                            return HTTOPRIGHT;

                   }

                   else if (pt.x >= rect.right - nFrame && pt.y >= rect.bottom - nFrame)

                   {

                            return HTBOTTOMRIGHT;

                   }

                   else if (pt.x <= nFrame)

                   {

                            return HTLEFT;

                   }

                   else if (pt.y <= nFrame)

                   {

                            return HTTOP;

                   }

                   else if (pt.y >= rect.bottom - nFrame)

                   {

                            return HTBOTTOM;

                   }

                   else if (pt.x >= rect.right - nFrame)

                  {

                            return HTRIGHT;

                   }

         }

         else if (RectResize.PtInRect(pt))

         {

                   return HTBOTTOMRIGHT;

         }

         // else if (rectTitle.PtInRect(pt))

         // {

         // return HTCAPTION;

         // }

         else

         {

                   return HTCLIENT;

         }

 

 

         return CDialog::OnNcHitTest(point);

}