first compiling and theoretically correct version of Push2 canvas display.

[ardour.git] / libs / surfaces / push2 / knob.h

diff --git a/libs/surfaces/push2/knob.h b/libs/surfaces/push2/knob.h
new file mode 100644 (file)
index 0000000..54b0236
--- /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__ */