Special list-tree-item for Eve. Most state is picked directly from TEveElement, no need to store it locally nor to manage its consistency. Handles also selected/highlighted colors and, in the future, drag-n-drop.
| void | NotSupported(const char* func) const | 
| TEveListTreeItem(const TEveListTreeItem&) | |
| TEveListTreeItem& | operator=(const TEveListTreeItem&) | 
| TGClient* | TGListTreeItem::fClient | pointer to TGClient | 
| Int_t | TGListTreeItem::fDNDState | EDNDFlags | 
| TEveElement* | fElement | |
| TGListTreeItem* | TGListTreeItem::fFirstchild | pointer to first child item | 
| UInt_t | TGListTreeItem::fHeight | item height | 
| TGListTreeItem* | TGListTreeItem::fLastchild | pointer to last child item | 
| TGListTreeItem* | TGListTreeItem::fNextsibling | pointer to next sibling | 
| Bool_t | TGListTreeItem::fOpen | true if item is open | 
| TGListTreeItem* | TGListTreeItem::fParent | pointer to parent | 
| TGListTreeItem* | TGListTreeItem::fPrevsibling | pointer to previous sibling | 
| Int_t | TGListTreeItem::fXtext | x position of item text | 
| Int_t | TGListTreeItem::fY | y position of item | 
| Int_t | TGListTreeItem::fYtext | y position of item text | 

Warn about access to function members that should never be called. TGListTree calls them in cases that are not used by Eve.
{ printf("TEveListTreeItem::CheckItem - to be ignored ... all done via signal Checked().\n"); }Propagation of checked-state form children to parents. Not needed, ignore. Item coloration (underline + minibox)
{ return fElement->HasMainColor(); }