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add Group::clear(), do not clear _canvas member of Item when unparented (only the parent is changed)

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This commit is contained in:
Paul Davis 2013-04-21 13:10:27 -04:00
parent fee8de9787
commit fca81c9a6a
5 changed files with 67 additions and 171 deletions
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4
libs/canvas/item.cc
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@ -236,13 +236,14 @@ Item::parent_to_item (ArdourCanvas::Rect const & d) const
void
Item::unparent ()
{
_canvas = 0;
_parent = 0;
}
void
Item::reparent (Group* new_parent)
{
assert (_canvas == _parent->canvas ());
if (_parent) {
_parent->remove (this);
}
@ -250,7 +251,6 @@ Item::reparent (Group* new_parent)
assert (new_parent);
_parent = new_parent;
_canvas = _parent->canvas ();
_parent->add (this);
}