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livetrax/gtk2_ardour/automation_line.h
Paul Davis f1d784afbb deep fix to the way automation control point drags are handled/computed
The old code could not snap to the grid, because it had a lot of confusion about pixels vs. time,
and between line-origin-relative time and absolute time
2023-02-10 11:11:51 -07:00

254 lines
8.5 KiB
C++

/*
* 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 __ardour_automation_line_h__
#define __ardour_automation_line_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"
class AutomationLine;
class ControlPoint;
class PointSelection;
class TimeAxisView;
class AutomationTimeAxisView;
class Selectable;
class Selection;
class PublicEditor;
/** A GUI representation of an ARDOUR::AutomationList */
class AutomationLine : public sigc::trackable, public PBD::StatefulDestructible
{
public:
enum VisibleAspects {
Line = 0x1,
ControlPoints = 0x2,
SelectedControlPoints = 0x4
};
AutomationLine (const std::string& name,
TimeAxisView& tv,
ArdourCanvas::Item& parent,
boost::shared_ptr<ARDOUR::AutomationList> al,
const ARDOUR::ParameterDescriptor& desc);
virtual ~AutomationLine ();
virtual Temporal::timepos_t get_origin () const;
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*>&);
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);
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 (uint32_t);
uint32_t get_line_color() const { return _line_color; }
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 ();
TimeAxisView& trackview;
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(boost::shared_ptr<ARDOUR::AutomationList> list);
boost::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_point_y (ControlPoint&, 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 &);
protected:
std::string _name;
guint32 _height;
uint32_t _line_color;
uint32_t _view_index_offset;
boost::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;
/** true if we did a push at any point during the current drag */
bool did_push;
ArdourCanvas::Item& _parent_group;
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 (PublicEditor& e);
private:
AutomationLine& line;
Temporal::timepos_t before_x;
Temporal::timepos_t after_x;
};
friend class ContiguousControlPoints;
typedef boost::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*);
private:
std::list<ControlPoint*> _drag_points; ///< points we are dragging
std::list<ControlPoint*> _push_points; ///< additional points we are dragging if "push" is enabled
bool _drag_had_movement; ///< true if the drag has seen movement, otherwise false
double _last_drag_fraction; ///< last y position of the drag, as a fraction
/** offset from the start of the automation list to the start of the line, so that
* a +ve offset means that the 0 on the line is at _offset in the list
*/
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;
/** maximum time that a point on this line can be at, relative to the position of its region or start of its track */
Temporal::timepos_t _maximum_time;
bool _fill;
const ARDOUR::ParameterDescriptor _desc;
friend class AudioRegionGainLine;
};
#endif /* __ardour_automation_line_h__ */