X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fcanvas%2Fpoly_line.cc;h=60bca6bccf87011de9afbc28f6a12d679d49184f;hb=a0cb2f95f0706179f88dc0175769705ddeded389;hp=7118e47555d1e74d0f03752e5855ffe8fbd2d8c5;hpb=c4f0063a68d189a59450a5bba658fc3092bc936b;p=ardour.git

diff --git a/libs/canvas/poly_line.cc b/libs/canvas/poly_line.cc
index 7118e47555..60bca6bccf 100644
--- a/libs/canvas/poly_line.cc
+++ b/libs/canvas/poly_line.cc
@@ -25,11 +25,16 @@
 
 using namespace ArdourCanvas;
 
-PolyLine::PolyLine (Group* parent)
-	: Item (parent)
-	, PolyItem (parent)
+PolyLine::PolyLine (Canvas* c)
+	: PolyItem (c)
+	, _threshold (1.0)
 {
+}
 
+PolyLine::PolyLine (Item* parent)
+	: PolyItem (parent)
+	, _threshold (1.0)
+{
 }
 
 void
@@ -45,7 +50,7 @@ PolyLine::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) cons
 bool
 PolyLine::covers (Duple const & point) const
 {
-	Duple p = canvas_to_item (point);
+	Duple p = window_to_item (point);
 
 	const Points::size_type npoints = _points.size();
 	
@@ -58,8 +63,7 @@ PolyLine::covers (Duple const & point) const
 
 	/* repeat for each line segment */
 
-	const Rect visible (_canvas->visible_area());
-	static const double threshold = 2.0;
+	const Rect visible (window_to_item (_canvas->visible_area()));
 
 	for (i = 1, j = 0; i < npoints; ++i, ++j) {
 
@@ -82,10 +86,10 @@ PolyLine::covers (Duple const & point) const
 		double d = distance_to_segment_squared (p, a, b, t, at);
 		
 		if (t < 0.0 || t > 1.0) {
-			return false;
+			continue;
 		}
 		
-		if (d < threshold) {
+		if (d < _threshold + _outline_width) {
 			return true;
 		}
 		
@@ -93,3 +97,9 @@ PolyLine::covers (Duple const & point) const
 	
 	return false;
 }
+
+void
+PolyLine::set_covers_threshold (double t)
+{
+	_threshold = t;
+}