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livetrax/gtk2_ardour/tempo_lines.h
nick_m 7fc3b0c34c Initial stab at tempo ramps.
Replaces the list of points in TempoMap with TempoSection functions, which
compute tempo-at or tick-at time relative to tempo section start.
TempoMap consults them additively to determine things like bbt_time(),
frame_time() get_grid() etc.
This has a marked effect on scrolling speed along with the code simplification
in the places it has been attempted.

Several things are broken here.
Currently every ramp except the last one is an exponential ramp. this may
be simple to fix :).
Mouse-over midi grid doesn't match mouse click grid. should also be simple.

Many things seem to work, but their accuracy should be in question until
each area has been addressed.
2016-05-27 23:38:09 +10:00

50 lines
1.7 KiB
C++

/*
Copyright (C) 2000-2007 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 __ardour_tempo_lines_h__
#define __ardour_tempo_lines_h__
#include "ardour/tempo.h"
#include "canvas/line_set.h"
class TempoLines {
public:
TempoLines (ArdourCanvas::Container* group, double screen_height);
void tempo_map_changed();
void draw (std::vector<ARDOUR::TempoMap::BBTPoint>& grid,
unsigned divisions,
ARDOUR::framecnt_t leftmost_frame,
ARDOUR::framecnt_t frame_rate);
void show();
void hide();
private:
void draw_ticks (std::vector<ARDOUR::TempoMap::BBTPoint>& grid,
unsigned divisions,
ARDOUR::framecnt_t leftmost_frame,
ARDOUR::framecnt_t frame_rate);
ArdourCanvas::LineSet lines;
};
#endif /* __ardour_tempo_lines_h__ */