I want to display item lastly checked in tree control mfc - mfc

Question

I tried this
void GetCheckedItems(const CTreeCtrl& tree, CArray<HTREEITEM> *checkedItems, HTREEITEM startItem = NULL)
{
if (startItem == NULL)
startItem = tree.GetRootItem();`
for (HTREEITEM item = startItem; item != NULL; item = tree.GetNextItem(item, TVGN_NEXT))
{
// figure out if this item is checked or not
UINT state = (tree.GetItemState(item, TVIS_STATEIMAGEMASK) >> 12) & 15;
if (state == 2)
checkedItems->Add(item);
// deal with children if present
HTREEITEM child = tree.GetNextItem(item, TVGN_CHILD);
if (child != NULL)
GetCheckedItems(tree, checkedItems, child);
}
}
now I have an array contains checked values but how do i know which i checked last time.

Answer 1

Just use a handler to TVN_ITEMCHANGED. It is called whenever an item state is changing.
You need to check the state flags that are changed. You can detect changes to the TVIS_STATEIMAGEMASK.

Answer 2

CString m;
HTREEITEM selItem;
selItem=m_treeRel.GetSelectedItem();
UINT uFlags = 0;
CPoint pt(0, 0);
GetCursorPos(&pt);
m_treeRel.ScreenToClient(&pt);
HTREEITEM hItem = m_treeRel.HitTest(pt, &uFlags);
if(NULL != hItem && (TVHT_ONITEM & uFlags))
{
/*if(selItem == hItem)
{
m=_T("Selected Item....");
}
else */
if(!m_treeRel.GetCheck(hItem))
{
m=m_treeRel.GetItemText(hItem);
//m_treeRel.SetCheck(hItem,true);
}
else
{
//m=_T("ERROR");
//m_treeRel.SetCheck(hItem,false);
}
}
ShowMessage(m);
*pResult = 0;
I Used This to find out which item was checked last time....!