crossfade_edit.h

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/*
 * Copyright (C) 2005-2013 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2005 Taybin Rutkin <taybin@taybin.com>
 * Copyright (C) 2006 Doug McLain <doug@nostar.net>
 * Copyright (C) 2007-2009 David Robillard <d@drobilla.net>
 * Copyright (C) 2009-2010 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2017 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 __gtk_ardour_xfade_edit_h__
#define __gtk_ardour_xfade_edit_h__
 
#include <list>
 
#include <gtkmm/box.h>
#include <gtkmm/button.h>
#include <gtkmm/radiobutton.h>
 
#include "canvas/canvas.h"
 
#include "evoral/Curve.h"
#include "ardour/session_handle.h"
 
#include "ardour_dialog.h"
 
namespace ARDOUR
{
        class Session;
        class AutomationList;
        class Crossfade;
}
 
namespace ArdourCanvas {
        class Rectangle;
        class Line;
        class Polygon;
}
 
namespace ArdourWaveview {
        class WaveView;
}
 
class CrossfadeEditor : public ArdourDialog
{
public:
        CrossfadeEditor (ARDOUR::Session*, std::shared_ptr<ARDOUR::Crossfade>, double miny, double maxy);
        ~CrossfadeEditor ();
 
        void apply ();
 
        static const double canvas_border;
 
        /* these are public so that a caller/subclass can make them do the right thing. */
 
        Gtk::Button* cancel_button;
        Gtk::Button* ok_button;
 
        struct PresetPoint {
                double x;
                double y;
 
                PresetPoint (double a, double b)
                        : x (a), y (b) {}
        };
 
        struct Preset : public std::list<PresetPoint> {
                const char* name;
                const char* image_name;
 
                Preset (const char* n, const char* x) : name (n), image_name (x) {}
        };
 
        typedef std::list<Preset*> Presets;
 
        static Presets* fade_in_presets;
        static Presets* fade_out_presets;
 
protected:
        bool on_key_press_event (GdkEventKey*);
        bool on_key_release_event (GdkEventKey*);
 
private:
        std::shared_ptr<ARDOUR::Crossfade> xfade;
 
        Gtk::VBox vpacker;
 
        struct Point {
                ~Point();
 
                ArdourCanvas::Rectangle* box;
                ArdourCanvas::PolyLine* curve;
                double x;
                double y;
 
                static const int32_t size;
 
                void move_to (double x, double y, double xfract, double yfract);
        };
 
        struct PointSorter {
                bool operator() (const CrossfadeEditor::Point* a, const CrossfadeEditor::Point *b) {
                        return a->x < b->x;
                }
        };
 
        ArdourCanvas::Rectangle*   toplevel;
        ArdourCanvas::GtkCanvas* canvas;
 
        struct Half {
                ArdourCanvas::PolyLine* line;
                ArdourCanvas::Polygon*  shading;
                std::list<Point*>       points;
                ARDOUR::AutomationList  normative_curve; /* 0 - 1.0, linear */
                ARDOUR::AutomationList  gain_curve;      /* 0 - 2.0, gain mapping */
                std::vector<ArdourWaveView::WaveView*>  waves;
 
                Half();
        };
 
        enum WhichFade {
                In = 0,
                Out = 1
        };
 
        Half fade[2];
        WhichFade current;
 
        bool point_grabbed;
        std::vector<Gtk::Button*> fade_out_buttons;
        std::vector<Gtk::Button*> fade_in_buttons;
 
        Gtk::VBox vpacker2;
 
        Gtk::Button clear_button;
        Gtk::Button revert_button;
 
        Gtk::ToggleButton audition_both_button;
        Gtk::ToggleButton audition_left_dry_button;
        Gtk::ToggleButton audition_left_button;
        Gtk::ToggleButton audition_right_dry_button;
        Gtk::ToggleButton audition_right_button;
 
        Gtk::ToggleButton preroll_button;
        Gtk::ToggleButton postroll_button;
 
        Gtk::HBox roll_box;
 
        gint event_handler (GdkEvent*);
 
        bool canvas_event (GdkEvent* event);
        bool point_event (GdkEvent* event, Point*);
        bool curve_event (GdkEvent* event);
 
        void canvas_allocation (Gtk::Allocation&);
        void add_control_point (double x, double y);
        Point* make_point ();
        void redraw ();
 
        double effective_width () const { return canvas->get_allocation().get_width() - (2.0 * canvas_border); }
        double effective_height () const { return canvas->get_allocation().get_height() - (2.0 * canvas_border); }
 
        void clear ();
        void reset ();
 
        double miny;
        double maxy;
 
        Gtk::Table fade_in_table;
        Gtk::Table fade_out_table;
 
        void build_presets ();
        void apply_preset (Preset*);
 
        Gtk::RadioButton select_in_button;
        Gtk::RadioButton select_out_button;
        Gtk::HBox   curve_button_box;
        Gtk::HBox   audition_box;
 
        void curve_select_clicked (WhichFade);
 
        double x_coordinate (double& xfract) const;
        double y_coordinate (double& yfract) const;
 
        void set (const ARDOUR::AutomationList& alist, WhichFade);
 
        PBD::ScopedConnection* _peaks_ready_connection;
        PBD::ScopedConnection state_connection;
 
        void make_waves (std::shared_ptr<ARDOUR::AudioRegion>, WhichFade);
        void peaks_ready (std::weak_ptr<ARDOUR::AudioRegion> r, WhichFade);
 
        void _apply_to (std::shared_ptr<ARDOUR::Crossfade> xf);
        void setup (std::shared_ptr<ARDOUR::Crossfade>);
        void cancel_audition ();
        void audition_state_changed (bool);
 
        enum Audition {
                Both,
                Left,
                Right
        };
 
        void audition_toggled ();
        void audition_right_toggled ();
        void audition_right_dry_toggled ();
        void audition_left_toggled ();
        void audition_left_dry_toggled ();
 
        void audition (Audition);
        void audition_both ();
        void audition_left_dry ();
        void audition_left ();
        void audition_right_dry ();
        void audition_right ();
 
        void xfade_changed (const PBD::PropertyChange&);
 
        void dump ();
};
 
#endif /* __gtk_ardour_xfade_edit_h__ */