diff options
| -rw-r--r-- | libs/canvas/canvas.cc | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/libs/canvas/canvas.cc b/libs/canvas/canvas.cc index 27ad1f4964..33ef333c96 100644 --- a/libs/canvas/canvas.cc +++ b/libs/canvas/canvas.cc @@ -231,8 +231,21 @@ Canvas::window_to_canvas (Duple const & d) const std::list<Item*> const& root_children (_root.items()); ScrollGroup* sg = 0; + /* if the coordinates are negative, clamp to zero and find the item + * that covers that "edge" position. + */ + + Duple in_window (d); + + if (in_window.x < 0) { + in_window.x = 0; + } + if (in_window.y < 0) { + in_window.y = 0; + } + for (std::list<Item*>::const_iterator i = root_children.begin(); i != root_children.end(); ++i) { - if (((sg = dynamic_cast<ScrollGroup*>(*i)) != 0) && sg->covers_window (d)) { + if (((sg = dynamic_cast<ScrollGroup*>(*i)) != 0) && sg->covers_window (in_window)) { break; } } |