Tempo ramps - add visualtempo curve, dragging bbt or music rulers with constraint modifier dilates previous tempo.

1 files changed, 74 insertions, 0 deletions

diff --git a/gtk2_ardour/tempo_curve.h b/gtk2_ardour/tempo_curve.h
new file mode 100644
index 0000000000..be378078c7
--- /dev/null
+++ b/gtk2_ardour/tempo_curve.h
@@ -0,0 +1,74 @@
+#ifndef __gtk_ardour_tempo_curve_h__
+#define __gtk_ardour_tempo_curve_h__
+
+#include <string>
+#include <glib.h>
+
+#include <sigc++/signal.h>
+
+#include "ardour/ardour.h"
+#include "pbd/signals.h"
+
+#include "canvas/fwd.h"
+#include "canvas/types.h"
+
+namespace ARDOUR {
+	class TempoSection;
+}
+class PublicEditor;
+
+class TempoCurve : public sigc::trackable
+{
+  public:
+	TempoCurve (PublicEditor& editor, ArdourCanvas::Container &, guint32 rgba, ARDOUR::TempoSection& temp, framepos_t frame, bool handle_events);
+	~TempoCurve ();
+
+	static PBD::Signal1<void,TempoCurve*> CatchDeletion;
+
+	static void setup_sizes (const double timebar_height);
+
+	ArdourCanvas::Item& the_item() const;
+	void canvas_height_set (double);
+
+	void set_position (framepos_t lower, framepos_t upper);
+	void set_color_rgba (uint32_t rgba);
+	framepos_t position() const { return frame_position; }
+
+	ArdourCanvas::Container * get_parent() { return _parent; }
+	void reparent (ArdourCanvas::Container & parent);
+
+	void hide ();
+	void show ();
+
+	ARDOUR::TempoSection& tempo () { return _tempo; }
+
+	void set_max_tempo (const double& max) { _max_tempo = max; }
+	void set_min_tempo (const double& min) { _min_tempo = min; }
+
+protected:
+	PublicEditor& editor;
+
+	ArdourCanvas::Container* _parent;
+	ArdourCanvas::Container *group;
+	ArdourCanvas::Points *points;
+	ArdourCanvas::Rectangle* _background;
+	ArdourCanvas::Curve* _curve;
+
+	double        unit_position;
+	framepos_t    frame_position;
+	framepos_t    _end_frame;
+	bool         _shown;
+	double       _canvas_height;
+	uint32_t     _color;
+
+	void reposition ();
+private:
+	double       _max_tempo;
+	double       _min_tempo;
+	/* disallow copy construction */
+	TempoCurve (TempoCurve const &);
+	TempoCurve & operator= (TempoCurve const &);
+	ARDOUR::TempoSection& _tempo;
+
+};
+#endif /* __gtk_ardour_tempo_curve_h__ */