1 files changed, 133 insertions, 0 deletions
diff --git a/libs/widgets/widgets/ardour_knob.h b/libs/widgets/widgets/ardour_knob.h
new file mode 100644
index 0000000000..84bb974adf
--- /dev/null
+++ b/libs/widgets/widgets/ardour_knob.h
@@ -0,0 +1,133 @@
+/*
+    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"
+#include "gtkmm2ext/persistent_tooltip.h"
+
+#include "widgets/visibility.h"
+
+namespace ArdourWidgets {
+
+class LIBWIDGETS_API KnobPersistentTooltip : public Gtkmm2ext::PersistentTooltip
+{
+public:
+	KnobPersistentTooltip (Gtk::Widget* w);
+
+	void start_drag ();
+	void stop_drag ();
+	bool dragging () const;
+
+private:
+	bool _dragging;
+};
+
+
+class LIBWIDGETS_API ArdourKnob : public CairoWidget , public Gtkmm2ext::Activatable
+{
+public:
+
+	enum Element {
+		Arc = 0x1,
+		Bevel = 0x2,
+		unused2 = 0x4,
+		unused3 = 0x8,
+		unused4 = 0x10,
+		unused5 = 0x20,
+	};
+
+	enum Flags {
+		NoFlags = 0,
+		Detent = 0x1,
+		ArcToZero = 0x2,
+	};
+
+	ArdourKnob (Element e = default_elements, Flags flags = NoFlags);
+	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;
+
+	void set_tooltip_prefix (std::string pfx) { _tooltip_prefix = pfx; controllable_changed (true); }
+
+	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::RefPtr<Cairo::Context> const&, 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 (bool force_update = false);
+	PBD::ScopedConnection watch_connection;
+
+
+  private:
+	Element _elements;
+	BindingProxy binding_proxy;
+
+	bool _hovering;
+	float _grabbed_x;
+	float _grabbed_y;
+
+	float _val; // current value [0..1]
+	float _normal; // default value, arc
+	float _dead_zone_delta;
+
+	Flags _flags;
+
+	void action_sensitivity_changed ();
+	void action_visibility_changed ();
+	void action_tooltip_changed ();
+
+	std::string _tooltip_prefix;
+	KnobPersistentTooltip _tooltip;
+};
+
+} /* namespace */
+
+#endif /* __gtk2_ardour_ardour_knob_h__ */