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Small mod for NULL behavior of show_item(item,yoff). (STR#2517)

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git-svn-id: file:///fltk/svn/fltk/branches/branch-1.3@8450 ea41ed52-d2ee-0310-a9c1-e6b18d33e121
This commit is contained in:
Greg Ercolano 2011-02-19 22:50:39 +00:00
parent 723fe666cf
commit 5bbcebe9cd
1 changed files with 3 additions and 2 deletions
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5
src/Fl_Tree.cxx
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@ -782,13 +782,14 @@ int Fl_Tree::select_only(Fl_Tree_Item *selitem, int docallback) {
/// the value will be clipped. So if yoff=100, but scrollbar's max
/// is 50, then 50 will be used.
///
/// \param[in] item The item to be shown. Should not be NULL.
/// \param[in] item The item to be shown. If NULL, first() is used.
/// \param[in] yoff The pixel offset from the top for the displayed position.
///
/// \see show_item_top(), show_item_middle(), show_item_bottom()
///
void Fl_Tree::show_item(Fl_Tree_Item *item, int yoff) {
if ( ! item ) return;
item = item ? item : first();
if (!item) return;
int newval = item->y() - y() - yoff + (int)_vscroll->value();
if ( newval < _vscroll->minimum() ) newval = (int)_vscroll->minimum();
if ( newval > _vscroll->maximum() ) newval = (int)_vscroll->maximum();