- XMLNode* node = new XMLNode ("PolyLine");
- add_poly_item_state (node);
- add_outline_state (node);
- return node;
+ Duple p = window_to_item (point);
+
+ const Points::size_type npoints = _points.size();
+
+ if (npoints < 2) {
+ return false;
+ }
+
+ Points::size_type i;
+ Points::size_type j;
+
+ /* repeat for each line segment */
+
+ const Rect visible (window_to_item (_canvas->visible_area()));
+
+ for (i = 1, j = 0; i < npoints; ++i, ++j) {
+
+ Duple at;
+ double t;
+ Duple a (_points[j]);
+ Duple b (_points[i]);
+
+ /*
+ Clamp the line endpoints to the visible area of the canvas. If we do
+ not do this, we may have a line segment extending to COORD_MAX and our
+ math goes wrong.
+ */
+
+ a.x = std::min (a.x, visible.x1);
+ a.y = std::min (a.y, visible.y1);
+ b.x = std::min (b.x, visible.x1);
+ b.y = std::min (b.y, visible.y1);
+
+ double d = distance_to_segment_squared (p, a, b, t, at);
+
+ if (t < 0.0 || t > 1.0) {
+ continue;
+ }
+
+ if (d < _threshold + _outline_width) {
+ return true;
+ }
+
+ }
+
+ return false;