shuttle_control.h

Go to the documentation of this file.

/*
    Copyright (C) 2011 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_shuttle_control_h__
#define __gtk2_ardour_shuttle_control_h__

#include <gtkmm/drawingarea.h>

#include "gtkmm2ext/binding_proxy.h"

#include "pbd/controllable.h"
#include "ardour/session_handle.h"

namespace Gtk {
        class Menu;
}

#include "ardour/types.h"

class ShuttleControl : public CairoWidget, public ARDOUR::SessionHandlePtr
{
  public:
        ShuttleControl ();
        ~ShuttleControl ();

        void map_transport_state ();
        void set_shuttle_fract (double, bool zero_ok = false);
        double get_shuttle_fract () const { return shuttle_fract; }
        void set_session (ARDOUR::Session*);

        struct ShuttleControllable : public PBD::Controllable {
                ShuttleControllable (ShuttleControl&);
                void set_value (double);
                double get_value (void) const;

                double lower() const { return -1.0; }
                double upper() const { return  1.0; }

                ShuttleControl& sc;
        };

        boost::shared_ptr<ShuttleControllable> controllable() const { return _controllable; }

  protected:
        bool _hovering;
        float  shuttle_max_speed;
        float  last_speed_displayed;
        bool   shuttle_grabbed;
        double shuttle_speed_on_grab;
        float shuttle_fract;
        boost::shared_ptr<ShuttleControllable> _controllable;
        cairo_pattern_t* pattern;
        cairo_pattern_t* shine_pattern;
        ARDOUR::microseconds_t last_shuttle_request;
        PBD::ScopedConnection parameter_connection;
        Gtk::Menu*        shuttle_unit_menu;
        Gtk::Menu*        shuttle_style_menu;
        Gtk::Menu*        shuttle_context_menu;
        BindingProxy      binding_proxy;

        void build_shuttle_context_menu ();
        void show_shuttle_context_menu ();
        void shuttle_style_changed();
        void shuttle_unit_clicked ();
        void set_shuttle_max_speed (float);

        bool on_enter_notify_event (GdkEventCrossing*);
        bool on_leave_notify_event (GdkEventCrossing*);
        bool on_button_press_event (GdkEventButton*);
        bool on_button_release_event(GdkEventButton*);
        bool on_scroll_event (GdkEventScroll*);
        bool on_motion_notify_event(GdkEventMotion*);

        void render (cairo_t *, cairo_rectangle_t*);

        void on_size_allocate (Gtk::Allocation&);
        bool on_query_tooltip (int, int, bool, const Glib::RefPtr<Gtk::Tooltip>&);

        gint mouse_shuttle (double x, bool force);
        void use_shuttle_fract (bool force, bool zero_ok = false);
        void parameter_changed (std::string);

        void set_shuttle_units (ARDOUR::ShuttleUnits);
        void set_shuttle_style (ARDOUR::ShuttleBehaviour);

        int speed_as_semitones (float, bool&);
        int fract_as_semitones (float, bool&);

        float semitones_as_speed (int, bool);
        float semitones_as_fract (int, bool);
};

#endif /* __gtk2_ardour_shuttle_control_h__ */