shuttle_control.h

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/*
 * Copyright (C) 2011-2016 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2014-2019 Robin Gareus <robin@gareus.org>
 *
 * 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.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
#ifndef __gtk2_ardour_shuttle_control_h__
#define __gtk2_ardour_shuttle_control_h__
 
#include <ytkmm/drawingarea.h>
 
#include "pbd/controllable.h"
 
#include "ardour/session_handle.h"
#include "ardour/types.h"
 
#include "gtkmm2ext/cairo_widget.h"
 
#include "widgets/ardour_button.h"
#include "widgets/binding_proxy.h"
 
#include "varispeed_dialog.h"
 
namespace Gtk {
        class Menu;
}
 
class ShuttleInfoButton : public ArdourWidgets::ArdourButton, public ARDOUR::SessionHandlePtr
{
public:
        ShuttleInfoButton ();
        ~ShuttleInfoButton ();
 
        bool on_button_press_event (GdkEventButton*);
 
        void set_shuttle_units (ARDOUR::ShuttleUnits s);
 
private:
        void                  parameter_changed (std::string);
        void                  build_disp_context_menu ();
        Gtk::Menu*            disp_context_menu;
        PBD::ScopedConnection parameter_connection;
 
        bool _ignore_change;
};
 
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*);
 
        void do_blink (bool);
        void set_colors ();
 
        struct ShuttleControllable : public PBD::Controllable {
                ShuttleControllable (ShuttleControl&);
                void   set_value (double, PBD::Controllable::GroupControlDisposition group_override);
                double get_value (void) const;
 
                double lower () const { return -1.0; }
                double upper () const { return 1.0; }
 
                ShuttleControl& sc;
        };
 
        std::shared_ptr<ShuttleControllable> controllable () const
        {
                return _controllable;
        }
 
        ArdourWidgets::ArdourButton* info_button ()
        {
                return &_info_button;
        }
 
        ArdourWidgets::ArdourButton* vari_button ()
        {
                return &_vari_button;
        }
 
public:
        float speed_as_fract (float) const;
        float fract_as_speed (float) const;
 
        static int speed_as_semitones (float, bool&);
        static int speed_as_cents (float, bool&);
 
protected:
        bool                                   _hovering;
        float                                  shuttle_max_speed;
        float                                  last_speed_displayed;
        float                                  last_shuttle_fract;
        bool                                   shuttle_grabbed;
        double                                 shuttle_speed_on_grab;
        double                                 requested_speed;
        float                                  shuttle_fract;
        std::shared_ptr<ShuttleControllable> _controllable;
        cairo_pattern_t*                       pattern;
        cairo_pattern_t*                       shine_pattern;
        PBD::microseconds_t                    last_shuttle_request;
        PBD::ScopedConnection                  parameter_connection;
        PBD::ScopedConnection                  port_connection;
        ShuttleInfoButton                      _info_button;
        Gtk::Menu*                             shuttle_context_menu;
        ArdourWidgets::BindingProxy            binding_proxy;
        float                                  bg_r, bg_g, bg_b;
        void                                   build_shuttle_context_menu ();
        void                                   set_shuttle_max_speed (float);
 
        VarispeedDialog             _vari_dialog;
        ArdourWidgets::ArdourButton _vari_button;
        void                        varispeed_button_clicked ();
        bool                        varispeed_button_scroll_event (GdkEventScroll*);
 
        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_motion_notify_event (GdkEventMotion*);
 
        bool on_button_press_event_for_display (GdkEventButton*);
 
        void render (Cairo::RefPtr<Cairo::Context> const&, 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);
 
        bool _ignore_change;
};
 
#endif /* __gtk2_ardour_shuttle_control_h__ */