Fix resizing problem in above article

WEBINAR: On-demand webcast

How to Boost Database Development Productivity on Linux, Docker, and Kubernetes with Microsoft SQL Server 2017 REGISTER >


Override CListCtrl::OnNotify as follows :

BOOL CMyListCtrl::OnNotify(WPARAM wParam, LPARAM lParam, LRESULT*pResult) 
{
  HD_NOTIFY *pHD = (HD_NOTIFY*)lParam;

  if ((pHD->hdr.code == HDN_ITEMCHANGINGA || pHD->hdr.code == HDN_ITEMCHANGINGW) && (GetStyle() & LVS_TYPEMASK) == LVS_REPORT)
  { // Invalidate empty bottom part of control to force erase the previous position of column
    int nBottom,nLastItem=GetItemCount()-1;
    if (nLastItem<0)
      nBottom=0; // List is empty : invalidate whole client rect
    else
    { // Get Y position of bottom of list (last item)
      RECT ItemRect;
      GetItemRect(nLastItem,&ItemRect,LVIR_BOUNDS);
      nBottom=ItemRect.bottom;
    }
    
    RECT rect;
    GetClientRect(&rect);
    if (nBottom<rect.bottom)
    { // Set top of rect as bottom of list (last item) : rect = empty part of list
      rect.top=nBottom;
      InvalidateRect(&rect);
    }

    // NB: We must to on with default processing.
  }

  *pResult = 0;
  return CListCtrl::OnNotify(wParam, lParam, pResult);
}

Simply adding a HDN_ITEMCHANGING or HDN_TRACK handler with
ClassWizarddoesn't work. These handlers are not called. Why ???
I noticed that class wizard places an ON_NOTIFY_REFLECT(...) entry for
these notifications. I'd rather put an ON_NOTIFY(...) since the
notification comes from the header control to its parent (the listctrl).
But Spy++ shows that the CtrlID of the header is 0. repplacing the
ON_NOTIFY_REFLECT entry by ON_NOTIFY(HDN_xxx,0,f) didn't solve the
problem. That's why I chose to override OnNotify()



Comments

  • Column resizing

    Posted by Legacy on 04/22/1999 12:00am

    Originally posted by: Srinivas Bandi

    I have problems when resizing the column, the right side of the control is not repainted. Is there any fix for this problem. Please let me know if you have any update.

    Reply
  • CListCtrl Redraw of grid lines on Scrolling

    Posted by Legacy on 04/01/1999 12:00am

    Originally posted by: Dharmesh Sethi

    I am having a very similar problem. Similar barcode-like lines appear when I use the horizontal scroll bar. I am using an owner draw version of a CListCtrl derived class. If anyone has any solutions/suggestions pls let me know.

    Otherwise is there any way for me to use the LVS_EX_GRIDLINES extended style for the CListCtrl and then change the color of the grid lines.

    Thanks for any help,
    dharmesh_sethi@rsco.com

    Reply
  • This doesn't work for views.

    Posted by Legacy on 03/02/1999 12:00am

    Originally posted by: Bill Foust

    No complaints, just an FYI. If you are using CListViews, this solution doesn't
    work. I ended up calling OnEraseBkgnd() in OnPaint(). Probably not the best
    solution, but it works. :)

    Bill

    Reply
  • You must have javascript enabled in order to post comments.

Leave a Comment
  • Your email address will not be published. All fields are required.

Top White Papers and Webcasts

  • The software-defined data center (SDDC) and new trends in cloud and virtualization bring increased agility, automation, and intelligent services and management to all areas of the data center. Businesses can now more easily manage the entire lifecycle of their applications and services via the SDDC. This Aberdeen analyst report examines how a strong foundation in both the cloud and internal data centers is empowering organizations to fully leverage their IT infrastructure and is also preparing them to be able …

  • In order for IT service providers to succeed, it's paramount that they find a competitive advantage and continually develop new ways to find additional revenue streams. IT service providers need to be able to do it all for their clients – from managing entire technology infrastructures to responding quickly to a multitude of end-user needs. With a growing number of issues to resolve and limited technicians at hand, how can IT service providers operate efficiently while providing top-notch service …

Most Popular Programming Stories

More for Developers

RSS Feeds

Thanks for your registration, follow us on our social networks to keep up-to-date