mod/maxgui.mod/fltkmaxgui.mod/src/Fl_Tree.cxx
void Fl_Tree::show_item_middle(Fl_Tree_Item *item) {
  item = item ? item : first();
  if ( ! item ) return;
  show_item(item, h()/2 - item->h()/2);
}
/// Adjust the vertical scrollbar so that \p item is in the middle of the display.
Adjust the vertical scrollbar so that \p item is in the middle of the display.
Adjust the vertical scrollbar so that \ p item is in the middle of the display .
void Fl_Tree::show_item_middle(Fl_Tree_Item *item) {
  item = item ? item : first();
  if ( ! item ) return;
  show_item(item, h()/2 - item->h()/2);
}
void Fl_Tree :: show_item_middle ( Fl_Tree_Item * item ) { item = item ? item : first ( ) ; if ( ! item ) return ; show_item ( item , h ( ) / 2 - item -> h ( ) / 2 ) ; }
Adjust the vertical scrollbar so that \p item is in the middle of the display.
Adjust the vertical scrollbar so that \ p item is in the middle of the display .