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/*
Copyright (C) 2002-2007 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.
*/
#include "pbd/compose.h"
#include "canvas/canvas.h"
#include "canvas/debug.h"
#include "tempo_lines.h"
#include "ardour_ui.h"
#include "public_editor.h"
using namespace std;
TempoLines::TempoLines (ArdourCanvas::Group* group, double)
: lines (group, ArdourCanvas::LineSet::Vertical)
{
lines.set_extent (ArdourCanvas::COORD_MAX);
}
void
TempoLines::tempo_map_changed()
{
lines.clear ();
}
void
TempoLines::show ()
{
lines.show ();
}
void
TempoLines::hide ()
{
lines.hide ();
}
void
TempoLines::draw (const ARDOUR::TempoMap::BBTPointList::const_iterator& begin,
const ARDOUR::TempoMap::BBTPointList::const_iterator& end)
{
ARDOUR::TempoMap::BBTPointList::const_iterator i;
double beat_density;
uint32_t beats = 0;
uint32_t bars = 0;
uint32_t color;
/* get the first bar spacing */
i = end;
i--;
bars = (*i).bar - (*begin).bar;
beats = distance (begin, end) - bars;
beat_density = (beats * 10.0f) / lines.canvas()->width();
if (beat_density > 4.0f) {
/* if the lines are too close together, they become useless */
lines.clear ();
return;
}
lines.clear ();
for (i = begin; i != end; ++i) {
if ((*i).is_bar()) {
color = ARDOUR_UI::config()->get_canvasvar_MeasureLineBar();
} else {
if (beat_density > 2.0) {
continue; /* only draw beat lines if the gaps between beats are large. */
}
color = ARDOUR_UI::config()->get_canvasvar_MeasureLineBeat();
}
ArdourCanvas::Coord xpos = PublicEditor::instance().sample_to_pixel_unrounded ((*i).frame);
lines.add (xpos, 1.0, color);
}
}
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