List control header

[Pinpoint]

Hi,
Can anyone help with a problem I'm having with a list control. I want to be able to sort the list on each column, by clicking on the column header. But although I've added a function for the HDN_ITEMCLICK message nothing happens. I cant even trace the function, so I think it's not activating. The list is report style, with column headers enabled. And if it were to work, I also cant see how the function returns the column whose header is being clicked on...
Thanks
Pinpoint.

 

[TGM]

Hi

Here is how I did it ... I derived a class from the CHeaderCtrl class.
I overwrote the OnLButtonDown function as follows:

// Check for Mouse Hit in a Column Header

HD_HITTESTINFO hd_hittestinfo;

hd_hittestinfo.pt = point;

SendMessage( HDM_HITTEST, 0, ( LPARAM) ( &hd_hittestinfo));

if( hd_hittestinfo.flags == HHT_ONHEADER)
m_nColNdx = hd_hittestinfo.iItem;
else
m_nColNdx = -1;

CHeaderCtrl::OnLButtonDown(nFlags, point);

You could also overwrite OnRButtonDown and make a menu appears.

Thierry
EMail: Thierry.Marneffe@swing.be
Web Site:

http://users.swing.be/TGMSoft

 

[Pinpoint]

Thierry,
Thanks for that. One question. I have to assign the header control object to my list control with GetHeaderCtrl(). But this doesnt accept the new Header control class. So do I need a new list control class too, with the GetHeaderCtrl function overridden ? (I have tried doing this, but cannot add an object of the new list control class to my dialog. I've tried adding it as a custom control, but this doesnt seem to do anything - my dialog no longer runs).
Regards,
Pinpoint

 

[TGM]

Hi

Yes You're right.
To be honnest, I did it long ago, so I looked back some code I wrote and here is what I found:

I derived one class from CListCtrl that I called CExtListCtrl and one from CHeaderCtrl that I called CExtHeaderCtrl
In the CExtListCtrl, I declare the CExtHeaaderCtrl.

Then I overwrote the PresubclassWindow as show below:

void CExtListCtrl:reSubclassWindow()
{
CListCtrl:reSubclassWindow();

m_ExtHeaderCtrl.SubclassWindow( ::GetDlgItem( m_hWnd, 0));
}

HTH

Thierry
EMail: Thierry.Marneffe@swing.be
Web Site:

http://users.swing.be/TGMSoft/

 

[Pinpoint]

Hi,
Still having problems getting my new ListCtrl2 to display on my dialog. Am creating it dynamically as follows:

CRect r_List(179, 80, 322, 193); // posn for listctrl2 CListCtrl2 list2;
list2.Create(LVS_REPORT|LVS_SINGLESEL|LVS_SORTASCENDING| LVS_ALIGNLEFT, r_List, this, 990); // create listctrl2

CListCtrl2 * p_ListFiles2;
p_ListFiles2 = &list2;
p_ListFiles2->GetHeaderCtrl(); // set up HdrCtrl2 derived class...
p_ListFiles2->SetImageList(&m_imagelist, LVSIL_SMALL);p_ListFiles2->InsertColumn(0, "File", LVCFMT_LEFT, 124);
p_ListFiles2->InsertColumn(1, "Modified", LVCFMT_LEFT, 100);

No errors but nothing shows on the dialog. Anything obvious ?
Cheers.

 

[Guest_imported]

I think the easy way for you to handle the column click event is to add a LVN_COLUMNCLICK message handler in your program.
void YourDialog::OnColumnclickList1(NMHDR* pNMHDR, LRESULT* pResult)
{
NM_LISTVIEW* pNMListView = (NM_LISTVIEW*)pNMHDR;

// get the column
int _selColumn = pNMListView->iSubItem;
...
}

 

[Pinpoint]

That works like a dream !
Thanks a lot.
Pinpoint