X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fcanvas%2Fpoly_item.cc;h=855140856eb0f3ccdb60cbcd0d2f93870d67d22c;hb=c8c6bca6587450ff64303dbc994a4cd28d6ce7aa;hp=88b9af78781cbc28a4242287daac5a9ab2e240e0;hpb=032f394b2a0b975bc47760035de8e25310747972;p=ardour.git

diff --git a/libs/canvas/poly_item.cc b/libs/canvas/poly_item.cc
index 88b9af7878..855140856e 100644
--- a/libs/canvas/poly_item.cc
+++ b/libs/canvas/poly_item.cc
@@ -27,22 +27,25 @@
 using namespace std;
 using namespace ArdourCanvas;
 
-PolyItem::PolyItem (Group* parent)
-	: Item (parent)
-	, Outline (parent)
+PolyItem::PolyItem (Canvas* c)
+	: Item (c)
 {
+}
 
+PolyItem::PolyItem (Item* parent)
+	: Item (parent)
+{
 }
 
 void
 PolyItem::compute_bounding_box () const
 {
-	
+
 	if (!_points.empty()) {
 
 		Rect bbox;
 		Points::const_iterator i = _points.begin();
-		
+
 		bbox.x0 = bbox.x1 = i->x;
 		bbox.y0 = bbox.y1 = i->y;
 
@@ -56,13 +59,13 @@ PolyItem::compute_bounding_box () const
 			++i;
 		}
 
-		_bounding_box = bbox.expand (_outline_width);
+		_bounding_box = bbox.expand (_outline_width + 0.5);
+
 
-		
 	} else {
 		_bounding_box = boost::optional<Rect> ();
 	}
-	
+
 	_bounding_box_dirty = false;
 }
 
@@ -110,14 +113,14 @@ PolyItem::render_curve (Rect const & area, Cairo::RefPtr<Cairo::Context> context
 		Duple c2 = item_to_window (Duple (cp2->x, cp2->y));
 
 		c = item_to_window (Duple (p->x, p->y));
-		
-		context->curve_to (c1.x + pixel_adjust, 
-				   c1.y + pixel_adjust, 
-				   c2.x + pixel_adjust, 
-				   c2.y + pixel_adjust, 
-				   c.x + pixel_adjust, 
+
+		context->curve_to (c1.x + pixel_adjust,
+				   c1.y + pixel_adjust,
+				   c2.x + pixel_adjust,
+				   c2.y + pixel_adjust,
+				   c.x + pixel_adjust,
 				   c.y + pixel_adjust);
-		
+
 		++cp1;
 		++cp2;
 		++p;
@@ -127,12 +130,15 @@ PolyItem::render_curve (Rect const & area, Cairo::RefPtr<Cairo::Context> context
 void
 PolyItem::set (Points const & points)
 {
-	begin_change ();
-	
-	_points = points;
-	
-	_bounding_box_dirty = true;
-	end_change ();
+	if (_points != points) {
+
+		begin_change ();
+
+		_points = points;
+
+		_bounding_box_dirty = true;
+		end_change ();
+	}
 }
 
 Points const &