Fix astate setting for combo parameters when setting all astate

[ardour.git] / libs / canvas / polygon.cc

diff --git a/libs/canvas/polygon.cc b/libs/canvas/polygon.cc
index c97a8a2c9614376ea0dbb0c0b79e5b08bcf278a7..53fea1c5f4f9bdacaa419f0e7270c20d2b95ff1e 100644 (file)
--- a/libs/canvas/polygon.cc
+++ b/libs/canvas/polygon.cc
@@ -1,27 +1,69 @@
+/*
+    Copyright (C) 2011-2013 Paul Davis
+    Author: Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
 #include "canvas/polygon.h"
 
 using namespace ArdourCanvas;
 
-Polygon::Polygon (Group* parent)
-       : Item (parent)
-       , PolyItem (parent)
-       , Fill (parent)
+Polygon::Polygon (Canvas* c)
+       : PolyItem (c)
+       , multiple (0)
+       , constant (0)
+       , cached_size (0)
+{
+}
+
+Polygon::Polygon (Item* parent)
+       : PolyItem (parent)
+       , multiple (0)
+       , constant (0)
+       , cached_size (0)
 {
+}
 
+Polygon::~Polygon ()
+{
+       delete [] multiple;
+       delete [] constant;
 }
 
 void
 Polygon::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
 {
-       if (_outline) {
-               setup_outline_context (context);
+       if (_outline || _fill) {
                render_path (area, context);
-               
+
                if (!_points.empty ()) {
-                       context->move_to (_points.front().x, _points.front().y);
+                       /* close path */
+                       Duple p = item_to_window (Duple (_points.front().x, _points.front().y));
+                       context->line_to (p.x, p.y);
                }
 
-               context->stroke_preserve ();
+       }
+
+       if (_outline) {
+               setup_outline_context (context);
+               if (_fill) {
+                       context->stroke_preserve ();
+               } else {
+                       context->stroke ();
+               }
        }
 
        if (_fill) {
@@ -30,3 +72,72 @@ Polygon::render (Rect const & area, Cairo::RefPtr<Cairo::Context> context) const
        }
 }
 
+void
+Polygon::cache_shape_computation () const
+{
+       Points::size_type npoints = _points.size();
+
+       if (npoints == 0) {
+               return;
+       }
+
+       Points::size_type i;
+       Points::size_type j = npoints -1;
+
+       if (cached_size < npoints) {
+               cached_size = npoints;
+               delete [] multiple;
+               multiple = new float[cached_size];
+               delete [] constant;
+               constant = new float[cached_size];
+       }
+
+       for (i = 0; i < npoints; i++) {
+               if (_points[j].y == _points[i].y) {
+                       constant[i] = _points[i].x;
+                       multiple[i] = 0;
+               } else {
+                       constant[i] = _points[i].x-(_points[i].y*_points[j].x)/(_points[j].y-_points[i].y)+(_points[i].y*_points[i].x)/(_points[j].y-_points[i].y);
+                       multiple[i] = (_points[j].x-_points[i].x)/(_points[j].y-_points[i].y);
+               }
+
+               j = i;
+       }
+}
+
+bool
+Polygon::covers (Duple const & point) const
+{
+       Duple p = window_to_item (point);
+
+       Points::size_type npoints = _points.size();
+
+       if (npoints == 0) {
+               return false;
+       }
+
+       Points::size_type i;
+       Points::size_type j = npoints -1;
+       bool oddNodes = false;
+
+       if (_bounding_box_dirty) {
+               compute_bounding_box ();
+       }
+
+       for (i = 0; i < npoints; i++) {
+               if (((_points[i].y < p.y && _points[j].y >= p.y) || (_points[j].y < p.y && _points[i].y >= p.y))) {
+                       oddNodes ^= (p.y * multiple[i] + constant[i] < p.x);
+               }
+               j = i;
+       }
+
+       return oddNodes;
+}
+
+void
+Polygon::compute_bounding_box () const
+{
+       PolyItem::compute_bounding_box ();
+       cache_shape_computation ();
+}
+