LVS_NOSORTHEADER style for a CListCtrl

anatoly.katzman@octel.com
Sunday, February 23, 1997

  Environment: NT 4.0, VC++ 4.1
  
  My list control 
  
     CListCtrl lstctrl;
  
  is created as sortable, so that clicking on a column header 
  makes the header be pressed down like a pushbutton, and the 
  list is resorted by that column contents.
  
  On some conditions I need to disable this feature (on already 
  created and living list control). I thought I could do this by 
  modifying the list control style:
   
     BOOL bSuccess = lstctrl.ModifyStyle ( 
                         0L, // no styles to delete
                         LVS_NOSORTHEADER, // style to add
                         0L); // flags
  or
     DWORD dwStyle = ::GetWindowLong( lstctrl.m_hWnd, GWL_STYLE);
     dwStyle |= LVS_NOSORTHEADER;
     ::SetWindowLong( lstctrl.m_hWnd, GWL_STYLE, dwStyle);
  
  For other styles (LVS_REPORT/LVS_LIST/LVS_ICON) the both 
  methods worked fine, but with LVS_NOSORTHEADER neither of them 
  succeeds.
  
  Anyone having an idea what I am missing here, please help.
  
  Thanks,
  Anatoly Katzman

---

petter.hesselberg -- petter.hesselberg@ac.com
Tuesday, February 25, 1997

[Mini-digest: 2 responses]

Fair warning: I haven't tried this, so I don't know if it will help you. But 
it's where I'd start if I had your problem:

The header is not actually part of the list view, it is a control in its own 
right. One of the styles that apply to header controls is HDS_BUTTON. A 
listview created with styles LVS_NOSORTHEADER and LVS_REPORT gets a header 
that's missing the HDS_BUTTON style.

The docs indicate that you should be able to change the style of a header 
control dynamically. (This is not possible for all controls; you can't change 
the alignment for a multi-line edit control, for example.) In other words - get 
a handle to the header control and remove the HDS_BUTTON style.

Regards

Petter Hesselberg
(petter.hesselberg@ac.com)

PS: The header control is a child of the listview. The one and only, under 
normal circumstances.

_________________________________________________________________
To: mfc-l @ netcom.com  @ internet
cc:  (bcc: Petter Hesselberg)
From: anatoly.katzman @ octel.com @ internet
Date: 24-02-97 00:54
Subject: LVS_NOSORTHEADER style for a CListCtrl
_________________________________________________________________
  Environment: NT 4.0, VC++ 4.1
  
  My list control 
  
     CListCtrl lstctrl;
  
  is created as sortable, so that clicking on a column header 
  makes the header be pressed down like a pushbutton, and the 
  list is resorted by that column contents.
  
  On some conditions I need to disable this feature (on already 
  created and living list control). I thought I could do this by 
  modifying the list control style:
   
     BOOL bSuccess = lstctrl.ModifyStyle ( 
                         0L, // no styles to delete
                         LVS_NOSORTHEADER, // style to add
                         0L); // flags
  or
     DWORD dwStyle = ::GetWindowLong( lstctrl.m_hWnd, GWL_STYLE);
     dwStyle |= LVS_NOSORTHEADER;
     ::SetWindowLong( lstctrl.m_hWnd, GWL_STYLE, dwStyle);
  
  For other styles (LVS_REPORT/LVS_LIST/LVS_ICON) the both 
  methods worked fine, but with LVS_NOSORTHEADER neither of them 
  succeeds.
  
  Anyone having an idea what I am missing here, please help.
  
  Thanks,
  Anatoly Katzman


-----From: ktm@ormec.com

On mfc-l, anatoly.katzman@octel.com wrote:
> Environment: NT 4.0, VC++ 4.1
> 
> My list control, CListCtrl lstctrl, is created as sortable, so 
> that clicking on a column header makes the header be pressed 
> down like a pushbutton, and the list is resorted by that 
> column contents.
> 
> On some conditions I need to disable this feature (on already
> created and living list control). 

You need to get at the header part of the list control, and 
modify its styles directly, e.g.

    // must be in report mode
    ASSERT(GetWindowLong(m_list.m_hWnd, GWL_STYLE) & LVS_REPORT); 
    CHeaderCtrl* pHead = (CHeaderCtrl*) lstctrl.GetDlgItem(0);
    ASSERT(pHead != 0);
    pHead->ModifyStyle(HDS_BUTTONS, 0);

Note that when a list control is in report mode, the associated
header control always has ID 0. See books online under "About 
Header Control Styles" for more information about the header 
styles.

  Katy
-- 
Katy Mulvey                    <mailto:ktm@ormec.com>
Software Development Engineer
ORMEC Systems

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