It seems that for some reason you didn't saw or like my sugestion that
allows automatic scroll of the the tree when navigating with keyboard:
case FL_Up: // next item up
case FL_Down: { // next item down
set_item_focus(next_visible_item(_item_focus, ekey)); // next
item
up|dn
if ( _item_focus ) { // item
in focus?
if ( _prefs.selectmode() == FL_TREE_SELECT_MULTI && //
multiselect on?
(Fl::event_state() & FL_SHIFT) && //
shift key?
! _item_focus->is_selected() ) { // not
already selected?
select(_item_focus); //
extend selection..
}
//code bellow allow automatic scrolling with keyboard
switch (ekey) {
case FL_Up:
if(_item_focus->y() < y())
vscroll->value(vscroll->value()-_item_focus->h());
break;
case FL_Down:
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