Finding an item in a Tree Control

[bansl]

When I am adding second level entries, (the root levels are titles), to my tree view, I get duplicate entries in the Tree.
So I would like to be able to search through the existing tree items to find if there is a match. However, there is a bewildering array of GetxxxItem() - type functions, which one(s) should I use to do this??

[ChrisD]

Try the following
this assumes you are stroing an object pointer as the itemdata for an entry, if you are using text just compre the text instead

HTREEITEM OLITreeView::getTreeItemFor(yourObject * pyo, HTREEITEM item = GetRootItem())
{
HTREEITEM childItem, theItem;
YourObject *tpyo;
// Is the item null
if (item == NULL)
return NULL;

tpyo = (YourObject*)GetItemData(item);
// Is the item the one we want
if (tpyo == pyo)
return item;

if(!ItemHasChildren(item))
return NULL;

childItem = GetNextItem(item, TVGN_CHILD);
while (childItem != NULL)
{ // call this function recusivly to check all children
theItem = getTreeItemFor(pyo, childItem);
if (theItem !=NULL)
return theItem;
childItem = GetNextItem(childItem, TVGN_NEXT);
}
return NULL;
}

HTH,
Chris

[bansl]

That worked really well, I refined the code a little as the item I am looking for will always occur in the first level below the root;

hLev1 = NULL; // Preset to no Level1 Entries
if (ctc.ItemHasChildren(hRoot)) // If there are any Level1 Entries
{
hLev1 = ctc.GetNextItem(hRoot, TVGN_CHILD); // Get the Level1 Handle
while (hLev1 != NULL)
{
cs = ctc.GetItemText(hLev1); // Get the Item Name
if (m_ArtName == cs) // If there is already a level1 for this Artist
break; // ..quit
else
hLev1 = ctc.GetNextItem(hLev1, TVGN_NEXT);// ..else get the next one
}
}
if (hLev1 == NULL) // If we found no matches
hLev1 = ctc.InsertItem(m_ArtName, hRoot, TVI_SORT); // Insert new entry into the tree
hLev2 = ctc.InsertItem(m_CDTitle, hLev1, TVI_SORT); // Add the Title Below

ctc.SetItemData(hLev2, m_CDKey); // ..and hide the key