Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
+#include <cmath>
#include <algorithm>
+
#include <cairomm/context.h>
+
#include "pbd/compose.h"
#include "canvas/circle.h"
#include "canvas/types.h"
#include "canvas/debug.h"
-#include "canvas/utils.h"
#include "canvas/canvas.h"
using namespace std;
using namespace ArdourCanvas;
-Arc::Arc (Group* parent)
- : Item (parent)
- , Outline (parent)
- , Fill (parent)
+Arc::Arc (Canvas* c)
+ : Item (c)
, _radius (0.0)
, _arc_degrees (0.0)
, _start_degrees (0.0)
{
+}
+Arc::Arc (Item* parent)
+ : Item (parent)
+ , _radius (0.0)
+ , _arc_degrees (0.0)
+ , _start_degrees (0.0)
+{
}
void
/* this could be smaller in the case of small _arc values
but I can't be bothered to optimize it.
*/
-
+
bbox.x0 = _center.x - _radius;
bbox.y0 = _center.y - _radius;
bbox.x1 = _center.x + _radius;
if (_radius <= 0.0 || _arc_degrees <= 0.0) {
return;
}
- context->arc (_center.x, _center.y, _radius, _start_degrees * (M_PI/180.0), _arc_degrees * (M_PI/180.0));
+
+ Duple c = item_to_window (Duple (_center.x, _center.y));
+
+ context->arc (c.x, c.y, _radius, _start_degrees * (M_PI/180.0), _arc_degrees * (M_PI/180.0));
setup_fill_context (context);
context->fill_preserve ();
setup_outline_context (context);
Arc::set_radius (Coord r)
{
begin_change ();
-
+
_radius = r;
_bounding_box_dirty = true;
end_change ();
-}
-
+}
void
Arc::set_arc (double deg)
{
begin_change ();
-
+
_arc_degrees = deg;
_bounding_box_dirty = true;
end_change ();
-}
+}
void
Arc::set_start (double deg)
{
begin_change ();
-
+
_start_degrees = deg;
-
+
_bounding_box_dirty = true;
end_change ();
-}
+}
+
+bool
+Arc::covers (Duple const & point) const
+{
+ Duple p = window_to_item (point);
+
+ double angle_degs = atan (p.y/p.x) * 2.0 * M_PI;
+ double radius = sqrt (p.x * p.x + p.y * p.y);
+ return (angle_degs >= _start_degrees) &&
+ (angle_degs <= (_start_degrees + _arc_degrees)) &&
+ (radius < _radius);
+}