1 files changed, 90 insertions, 0 deletions
diff --git a/libs/surfaces/push2/knob.h b/libs/surfaces/push2/knob.h
new file mode 100644
index 0000000000..54b0236155
--- /dev/null
+++ b/libs/surfaces/push2/knob.h
@@ -0,0 +1,90 @@
+#ifndef __ardour_push2_knob_h__
+#define __ardour_push2_knob_h__
+
+#include <boost/shared_ptr.hpp>
+#include <sigc++/trackable.h>
+
+#include <cairomm/refptr.h>
+
+#include "pbd/signals.h"
+
+#include "canvas/item.h"
+#include "canvas/text.h"
+
+namespace ARDOUR {
+	class AutomationControl;
+}
+
+namespace Cairo {
+	class Context;
+	class Region;
+}
+
+namespace ArdourSurface {
+
+class Push2;
+
+class Push2Knob : public sigc::trackable, public ArdourCanvas::Item
+{
+public:
+	enum Element {
+		Arc = 0x1,
+		Bevel = 0x2,
+		unused2 = 0x4,
+		unused3 = 0x8,
+		unused4 = 0x10,
+		unused5 = 0x20,
+	};
+
+	enum Flags {
+		NoFlags = 0,
+		Detent = 0x1,
+		ArcToZero = 0x2,
+	};
+
+	Push2Knob (Push2& p, ArdourCanvas::Item*, Element e = default_elements, Flags flags = NoFlags);
+	virtual ~Push2Knob ();
+
+	static Element default_elements;
+
+	void add_flag (Flags);
+	void remove_flag (Flags);
+
+	void set_controllable (boost::shared_ptr<ARDOUR::AutomationControl> c);
+	boost::shared_ptr<ARDOUR::AutomationControl> controllable() const { return _controllable; }
+
+	void set_text_color (ArdourCanvas::Color);
+	void set_arc_start_color (ArdourCanvas::Color);
+	void set_arc_end_color (ArdourCanvas::Color);
+	void set_position (double x, double y);
+	void set_radius (double r);
+
+	void render (ArdourCanvas::Rect const &, Cairo::RefPtr<Cairo::Context>) const;
+	void compute_bounding_box() const;
+
+  protected:
+	void controllable_changed ();
+	PBD::ScopedConnection watch_connection;
+	boost::shared_ptr<ARDOUR::AutomationControl> _controllable;
+
+  private:
+	Push2& p2;
+	Element _elements;
+	Flags   _flags;
+	double  _r;
+	float   _val; // current value [0..1]
+	float   _normal; // default value, arc
+
+	ArdourCanvas::Color text_color;
+	ArdourCanvas::Color arc_start_color;
+	ArdourCanvas::Color arc_end_color;
+	ArdourCanvas::Text  text;
+
+	void set_pan_azimuth_text (double);
+	void set_pan_width_text (double);
+	void set_gain_text (double);
+};
+
+} // namespace
+
+#endif /* __ardour_push2_knob_h__ */