automation_line.h

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/*
 * Copyright (C) 2005-2017 Paul Davis <paul@linuxaudiosystems.com>
 * Copyright (C) 2005 Karsten Wiese <fzuuzf@googlemail.com>
 * Copyright (C) 2005 Nick Mainsbridge <mainsbridge@gmail.com>
 * Copyright (C) 2005 Taybin Rutkin <taybin@taybin.com>
 * Copyright (C) 2006 Hans Fugal <hans@fugal.net>
 * Copyright (C) 2007-2012 Carl Hetherington <carl@carlh.net>
 * Copyright (C) 2007-2015 David Robillard <d@drobilla.net>
 * Copyright (C) 2014-2017 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 __gtk2_ardour_automation_line_base_h__
#define __gtk2_ardour_automation_line_base_h__
 
#include <vector>
#include <list>
#include <string>
#include <sys/types.h>
 
#include <sigc++/signal.h>
 
#include "pbd/undo.h"
#include "pbd/statefuldestructible.h"
#include "pbd/memento_command.h"
 
#include "ardour/automation_list.h"
#include "ardour/parameter_descriptor.h"
#include "ardour/types.h"
 
#include "canvas/types.h"
#include "canvas/container.h"
#include "canvas/poly_line.h"
 
#include "selectable.h"
 
namespace ArdourCanvas {
        class Rectangle;
}
 
class EditorAutomationLine;
class ControlPoint;
class PointSelection;
class TimeAxisView;
class AutomationTimeAxisView;
class Selection;
class EditingContext;
 
class AutomationLine : public sigc::trackable, public PBD::StatefulDestructible, public SelectableOwner
{
public:
        enum VisibleAspects {
                Line = 0x1,
                ControlPoints = 0x2,
                SelectedControlPoints = 0x4
        };
 
        AutomationLine (const std::string&                      name,
                            EditingContext&                         ec,
                            ArdourCanvas::Item&                     parent,
                            ArdourCanvas::Rectangle*                drag_base,
                            std::shared_ptr<ARDOUR::AutomationList> al,
                            const ARDOUR::ParameterDescriptor&      desc);
 
        virtual ~AutomationLine ();
 
        virtual Temporal::timepos_t get_origin () const;
 
        ArdourCanvas::Rectangle* drag_base() const { return _drag_base; }
 
        void queue_reset ();
        void reset ();
        void clear ();
        void set_fill (bool f) { _fill = f; } // owner needs to call set_height
 
        void set_selected_points (PointSelection const &);
        void _get_selectables (Temporal::timepos_t const &, Temporal::timepos_t const &, double, double, std::list<Selectable*>&, bool within);
        void get_inverted_selectables (Selection&, std::list<Selectable*>& results);
 
        virtual void remove_point (ControlPoint&);
        bool control_points_adjacent (double xval, uint32_t& before, uint32_t& after);
 
        /* dragging API */
        virtual void start_drag_single (ControlPoint*, double, float);
        virtual void start_drag_line (uint32_t, uint32_t, float);
        virtual void start_drag_multiple (std::list<ControlPoint*>, float, XMLNode *);
        virtual std::pair<float, float> drag_motion (Temporal::timecnt_t const &, float, bool, bool with_push, uint32_t& final_index);
        virtual void end_drag (bool with_push, uint32_t final_index);
        virtual void end_draw_merge () {}
 
        ControlPoint* nth (uint32_t);
        ControlPoint const * nth (uint32_t) const;
        uint32_t npoints() const { return control_points.size(); }
 
        std::string  name()    const { return _name; }
        bool    visible() const { return _visible != VisibleAspects(0); }
        guint32 height()  const { return _height; }
 
        void set_line_color (std::string color, std::string mod = "");
        uint32_t get_line_color() const;
 
        void set_visibility (VisibleAspects);
        void add_visibility (VisibleAspects);
        void remove_visibility (VisibleAspects);
 
        void hide ();
        void set_height (guint32);
 
        bool get_uses_gain_mapping () const;
        void tempo_map_changed ();
 
        ArdourCanvas::Container& canvas_group() const { return *group; }
        ArdourCanvas::Item&  parent_group() const { return _parent_group; }
        ArdourCanvas::Item&  grab_item() const { return *line; }
 
        virtual std::string get_verbose_cursor_string (double) const;
        std::string get_verbose_cursor_relative_string (double, double) const;
        std::string fraction_to_string (double) const;
        std::string delta_to_string (double) const;
        double string_to_fraction (std::string const &) const;
 
        void   view_to_model_coord_y (double &) const;
 
        double              model_to_view_coord_y (double) const;
        Temporal::timecnt_t model_to_view_coord_x (Temporal::timepos_t const &) const;
 
        double compute_delta (double from, double to) const;
        void   apply_delta (double& val, double delta) const;
 
        void set_list(std::shared_ptr<ARDOUR::AutomationList> list);
        std::shared_ptr<ARDOUR::AutomationList> the_list() const { return alist; }
 
        void track_entered();
        void track_exited();
 
        bool is_last_point (ControlPoint &);
        bool is_first_point (ControlPoint &);
 
        XMLNode& get_state () const;
        int set_state (const XMLNode&, int version);
        void set_colors();
 
        void modify_points_y (std::vector<ControlPoint*> const&, double);
 
        virtual MementoCommandBinder<ARDOUR::AutomationList>* memento_command_binder ();
 
        std::pair<Temporal::timepos_t, Temporal::timepos_t> get_point_x_range () const;
 
        void set_maximum_time (Temporal::timepos_t const &);
        Temporal::timepos_t maximum_time () const {
                return _maximum_time;
        }
 
        void set_offset (Temporal::timepos_t const &);
        Temporal::timepos_t offset () { return _offset; }
        void set_width (Temporal::timecnt_t const &);
 
        Temporal::timepos_t session_position (Temporal::timepos_t const &) const;
        void dump (std::ostream&) const;
 
        double dt_to_dx (Temporal::timepos_t const &, Temporal::timecnt_t const &);
 
        ARDOUR::ParameterDescriptor const & param() const { return _desc; }
        EditingContext& editing_context() const { return _editing_context; }
 
        void add (std::shared_ptr<ARDOUR::AutomationControl>, GdkEvent*, Temporal::timepos_t const &, double y, bool with_guard_points);
 
protected:
 
        std::string    _name;
        guint32        _height;
        std::string    _line_color;
        std::string    _line_color_mod;
        uint32_t       _view_index_offset;
        std::shared_ptr<ARDOUR::AutomationList> alist;
 
        VisibleAspects _visible;
 
        bool    terminal_points_can_slide;
        bool    update_pending;
        bool    have_reset_timeout;
        bool    no_draw;
        bool    _is_boolean;
        bool    did_push;
 
        EditingContext&             _editing_context;
        ArdourCanvas::Item&         _parent_group;
        ArdourCanvas::Rectangle*    _drag_base;
        ArdourCanvas::Container*    group;
        ArdourCanvas::PolyLine*     line; /* line */
        ArdourCanvas::Points        line_points; /* coordinates for canvas line */
        std::vector<ControlPoint*>  control_points; /* visible control points */
 
        class ContiguousControlPoints : public std::list<ControlPoint*> {
          public:
                ContiguousControlPoints (AutomationLine& al);
                Temporal::timecnt_t clamp_dt (Temporal::timecnt_t const & dx, Temporal::timepos_t const & region_limit);
                void move (Temporal::timecnt_t const &, double dvalue);
                void compute_x_bounds ();
          private:
                AutomationLine& line;
                Temporal::timepos_t before_x;
                Temporal::timepos_t after_x;
        };
 
        friend class ContiguousControlPoints;
 
        typedef std::shared_ptr<ContiguousControlPoints> CCP;
        std::vector<CCP> contiguous_points;
 
        bool sync_model_with_view_point (ControlPoint&);
        bool sync_model_with_view_points (std::list<ControlPoint*>);
        void start_drag_common (double, float);
 
        void reset_callback (const Evoral::ControlList&);
        void list_changed ();
 
        virtual bool event_handler (GdkEvent*) = 0;
 
private:
        std::list<ControlPoint*> _drag_points; 
        std::list<ControlPoint*> _push_points; 
        bool _drag_had_movement; 
        double _last_drag_fraction; 
        Temporal::timepos_t _offset;
 
        bool is_stepped() const;
        void update_visibility ();
        void reset_line_coords (ControlPoint&);
        void add_visible_control_point (uint32_t, uint32_t, double, double, ARDOUR::AutomationList::iterator, uint32_t);
        double control_point_box_size ();
        void connect_to_list ();
        void interpolation_changed (ARDOUR::AutomationList::InterpolationStyle);
 
        PBD::ScopedConnectionList _list_connections;
 
        Temporal::timepos_t _maximum_time;
 
        bool _fill;
 
        const ARDOUR::ParameterDescriptor _desc;
 
        friend class AudioRegionGainLine;
        friend class RegionFxLine;
};
 
#endif /* __gtk2_ardour_automation_line_base_h__ */