Re: Which item was just 'checked' on my tree?

From:
"AliR \(VC++ MVP\)" <AliR@online.nospam>
Newsgroups:
microsoft.public.vc.mfc
Date:
Tue, 01 May 2007 15:31:28 GMT
Message-ID:
<k3JZh.2131$RX.1299@newssvr11.news.prodigy.net>
This seems to be good solution

void CTreeCheckDlg::OnNMClickTree1(NMHDR *pNMHDR, LRESULT *pResult)
{
   const MSG* pMsg = GetCurrentMessage();
   CPoint point(pMsg->pt);
   m_Tree.ScreenToClient(&point);
   UINT uiFlags = 0;
   HTREEITEM ht = m_Tree.HitTest(point, &uiFlags);
   if(ht && (uiFlags & TVHT_ONITEMSTATEICON))
   {
        //since the check state does not change until this function returns
        PostMessage(WM_ITEMCHECKED,ht);
   }
   *pResult = 0;
}

LRESULT CTreeCheckDlg::OnItemChecked(WPARAM,LPARAM)
{
    m_Tree.GetCheck(ht);
    return 1;
}

AliR.

"AliR (VC++ MVP)" <AliR@online.nospam> wrote in message
news:5QIZh.2126$RX.1715@newssvr11.news.prodigy.net...

You have to get the item yourself.
const MSG* pMsg = GetCurrentMessage();

CPoint point(pMsg->pt);

m_Tree.ScreenToClient(&point);

UINT uiFlags = 0;

HTREEITEM ht = m_Tree.HitTest(point, &uiFlags);

AliR.

"GT" <ContactGT_removeme_@hotmail.com> wrote in message
news:463717f6$0$30231$c3e8da3@news.astraweb.com...

I have a CTreeCtrl populated with a flat list of checkable items. Certain
items require a response when checked, so I am catching the event:
ON_NOTIFY(NM_CLICK, IDC_TREE_RHS, OnNMClickTreeRhs)

This gives my OnNMClickTreeRhs a NMHDR Structure. From the MSDN I can see
that this structure contains:

typedef struct tagNMHDR {
   HWND hwndFrom;
   UINT idFrom;
   UINT code;
} NMHDR;
 hwndFrom
 Window handle to the control sending a message.
 idFrom
 Identifier of the control sending a message.
 code
 Notification code. This member can be a control-specific notification
code or it can be one of the common notification codes.

I can't find useful help beyond this in the MSDN. Is there a way to find
out the HTREEITEM clicked or the LPARAM for the clicked tree item from
this structure? Is the hwndFrom perhaps the HTREEITEM or can I get that
from the 'code'. I can't use the selected Item as clicking the checkbox
on another item, doesn't change the selection!

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