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add coordinate space comment

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This commit is contained in:
Paul Davis 2013-10-28 12:27:03 -04:00
parent f25ff95390
commit 1eb680f937
1 changed files with 4 additions and 3 deletions
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7
libs/canvas/lookup_table.cc
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@ -49,18 +49,19 @@ DumbLookupTable::get (Rect const &)
return vitems;
}
/* XXX: what coordinate system is the point in? parent of our group I think */
vector<Item *>
DumbLookupTable::items_at_point (Duple point) const
{
/* Point is in canvas coordinate system */
list<Item *> items = _group.items ();
vector<Item *> vitems;
for (list<Item *>::const_iterator i = items.begin(); i != items.end(); ++i) {
boost::optional<Rect> item_bbox = (*i)->bounding_box ();
if (item_bbox) {
Rect parent_bbox = (*i)->item_to_parent (item_bbox.get ());
if (parent_bbox.contains (point)) {
Rect canvas_bbox = (*i)->item_to_canvas (item_bbox.get ());
if (canvas_bbox.contains (point)) {
vitems.push_back (*i);
}
}