Re: How can i set the style of a CTreeCtrl within a CTreeView ?

From:

=?Utf-8?B?UFJNQVJKT1JBTQ==?= <PRMARJORAM@discussions.microsoft.com>

Newsgroups:

microsoft.public.vc.mfc

Date:

Wed, 14 May 2008 09:03:00 -0700

Message-ID:

<9B4F1F3D-132C-4936-91C7-6EC3DAA01E4A@microsoft.com>

Thanks ill look into that modify style, looks alot better...

I have cracked it though now, needed to do the following
LONG style = ::GetWindowLong(tree.GetSafeHwnd(),GWL_STYLE);

::SetWindowLong(tree.GetSafeHwnd(),GWL_STYLE, style |
TVS_HASLINES |TVS_LINESATROOT);

So needed to combine the current style with the additions.

"M. Shoaib Surya" wrote:

Also, the call to the OnInitialUpdate() of the base class, that is, the
following line of code,
CTreeView::OnInitialUpdate();
should be the last line of the overridden CMyTreeView::OnInitialUpdate()
instead of the first line

- Shoaib

"M. Shoaib Surya" <shoaibsurya@hotmail.com> wrote in message
news:OYueoWdtIHA.4560@TK2MSFTNGP03.phx.gbl...

You should call ModifyStyle() member function of CTreeCtrl to set the
style. The following line of code should achieve your purpose.

tree.ModifyStyle(NULL, TVS_HASLINES |TVS_LINESATROOT);

Regards,
Shoaib.

"PRMARJORAM" <PRMARJORAM@discussions.microsoft.com> wrote in message
news:7A2A351F-F074-48AA-8D67-B0EFC1C2A298@microsoft.com...

Im using a MFC CTreeView which fits nicely with what im trying to do. I
need
to change the style of the nested CTreeCtrl.

There is no easy way to do this, the documentation points to using
SetWindowLong.

void CMyTreeView::OnInitialUpdate()

{

CTreeView::OnInitialUpdate();

CTreeCtrl& tree = GetTreeCtrl();

HTREEITEM root_item = tree.InsertItem(CString("MyProject"));
HTREEITEM init_request = tree.InsertItem(CString("Item 1"), root_item);
HTREEITEM doc_package = tree.InsertItem(CString("Item 2"), root_item);

ASSERT(tree.GetSafeHwnd() != NULL );

::SetWindowLong(tree.GetSafeHwnd(),GWL_STYLE,TVS_HASLINES
|TVS_LINESATROOT);
}

Iv tried using this to set the styles as in the above code, but the
program
gets corrupted.

How can i set the style of a CTreeCtrl nested in a CTreeView?