1 files changed, 97 insertions, 0 deletions
diff --git a/gtk2_ardour/ardour_knob.h b/gtk2_ardour/ardour_knob.h
new file mode 100644
index 0000000000..1a318a21dc
--- /dev/null
+++ b/gtk2_ardour/ardour_knob.h
@@ -0,0 +1,97 @@
+/*
+    Copyright (C) 2014 Paul Davis
+
+    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.
+*/
+
+#ifndef __gtk2_ardour_ardour_knob_h__
+#define __gtk2_ardour_ardour_knob_h__
+
+#include <list>
+#include <stdint.h>
+
+#include <gtkmm/action.h>
+
+#include "pbd/signals.h"
+#include "gtkmm2ext/binding_proxy.h"
+#include "gtkmm2ext/activatable.h"
+#include "gtkmm2ext/cairo_widget.h"
+
+class ArdourKnob : public CairoWidget , public Gtkmm2ext::Activatable
+{
+public:
+
+	enum Element {
+		Arc = 0x1,
+		Bevel = 0x2,
+		unused2 = 0x4,
+		unused3 = 0x8,
+		unused4 = 0x10,
+		unused5 = 0x20,
+	};
+
+	ArdourKnob (Element e = default_elements);
+	virtual ~ArdourKnob ();
+
+	void set_active_state (Gtkmm2ext::ActiveState);
+	void set_visual_state (Gtkmm2ext::VisualState);
+
+	Element elements() const { return _elements; }
+	void set_elements (Element);
+	void add_elements (Element);
+	static Element default_elements;
+
+	boost::shared_ptr<PBD::Controllable> get_controllable() { return binding_proxy.get_controllable(); }
+ 	void set_controllable (boost::shared_ptr<PBD::Controllable> c);
+
+	bool on_button_press_event (GdkEventButton*);
+	bool on_button_release_event (GdkEventButton*);
+	bool on_scroll_event (GdkEventScroll* ev);
+	bool on_motion_notify_event (GdkEventMotion *ev) ;
+
+	void color_handler ();
+
+  protected:
+	void render (cairo_t *, cairo_rectangle_t *);
+	void on_size_request (Gtk::Requisition* req);
+	void on_size_allocate (Gtk::Allocation&);
+	void on_style_changed (const Glib::RefPtr<Gtk::Style>&);
+	void on_name_changed ();
+	bool on_enter_notify_event (GdkEventCrossing*);
+	bool on_leave_notify_event (GdkEventCrossing*);
+	bool on_focus_in_event (GdkEventFocus*);
+	bool on_focus_out_event (GdkEventFocus*);
+
+	void controllable_changed ();
+	PBD::ScopedConnection watch_connection;
+
+
+  private:
+	Element                     _elements;
+
+	BindingProxy                binding_proxy;
+
+	bool _hovering;
+	bool _grabbed;
+	float _grabbed_y;
+
+	float _val;  //percent of knob travel
+
+	void action_sensitivity_changed ();
+	void action_visibility_changed ();
+	void action_tooltip_changed ();
+};
+
+#endif /* __gtk2_ardour_ardour_knob_h__ */