CTreeCtrl - getting an item position - c++

Question

Is there a way of getting the position (index) of an item in a CTreeCtrl?
I am interested in the index of a node at its particular level.
I was thinking to maintain the item positions within the item "data" field, but the problem is that my tree is sorted and I cannot predict the position an item will receive (well, only if I sort the items in advance which I would like to avoid).

Answer 1

I don't think you can. I assumed that maybe the control could be treated as an array (maybe it still can but I can't find a reference).
Anyways, there are no member functions (according to the MFC API) that give you access to that information

Answer 2

/// there is another way if you "Use Unicode Character Set" (visual studio)
/// Properties->General->Character Set
CPoint point;
GetCursorPos(&point);
m_Tree.ScreenToClient(&point);
UINT nHitFlags;
HTREEITEM hItem = m_Tree.HitTest(point, &nHitFlags);
int idx = m_Tree.MapItemToAccId(hItem);

Answer 3

Get the node handle and then iterate over the elem
Iterate over all the elements, while you count the elements, till you reach the right item?

Answer 4

int GetIndex(const CString & a_Cstr)
{
int idx = 0;
std::vector<CString>::const_iterator _begIt = m_RulesVec.begin();
std::vector<CString>::const_iterator _PosIt = find(m_RulesVec.begin(), m_RulesVec.end(), a_Cstr);
if (_PosIt == m_RulesVec.end()) {
return -1;
}
else {
while (_begIt != _PosIt) {
++idx;
++_begIt;
}
return idx;
}
}
/// it can(must) be done in this function
/// OnNMClickRulesTree(NMHDR *pNMHDR, LRESULT *pResult)
// Create vector like this
std::vector<CString> Vec{"first", "second", "third" };
// OnInit insert items to CtreeCtrl like this
m_Tree.InsertItem("first", hItem);
m_Tree.InsertItem("second", hItem);
m_Tree.InsertItem("third", hItem);
// then get cur selected item like this
CPoint point;
GetCursorPos(&point);
m_Tree.ScreenToClient(&point);
UINT nHitFlags;
HTREEITEM hItem = m_Tree.HitTest(point, &nHitFlags);
// get item text
CString Cstr = m_Tree.GetItemText(hKid);
int idx = GetIndex(Cstr);