David Robillard
7c950f279b
Draw tempo lines on time canvas and connect them up all pretty-like to the ruler ticks. Still needs some visual tweaking, but... they draw! Finally! git-svn-id: svn://localhost/ardour2/trunk@2247 d708f5d6-7413-0410-9779-e7cbd77b26cf
123 lines
3.0 KiB
C++
123 lines
3.0 KiB
C++
/*
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Copyright (C) 2002-2007 Paul Davis
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#include <libgnomecanvasmm/canvas.h>
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#include <libgnomecanvasmm/group.h>
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#include "tempo_lines.h"
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#include "ardour_ui.h"
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ArdourCanvas::SimpleLine *
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TempoLines::get_line ()
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{
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ArdourCanvas::SimpleLine *line;
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if (_free_lines.empty()) {
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line = new ArdourCanvas::SimpleLine (*_group);
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_used_lines.push_back (line);
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} else {
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line = _free_lines.front();
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_free_lines.erase (_free_lines.begin());
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_used_lines.push_back (line);
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}
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return line;
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}
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void
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TempoLines::hide ()
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{
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for (Lines::iterator i = _used_lines.begin(); i != _used_lines.end(); ++i) {
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(*i)->hide();
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_free_lines.push_back (*i);
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}
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_used_lines.clear ();
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}
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void
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TempoLines::draw (ARDOUR::TempoMap::BBTPointList& points, double frames_per_unit)
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{
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ARDOUR::TempoMap::BBTPointList::iterator i;
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ArdourCanvas::SimpleLine *line;
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gdouble xpos;
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double who_cares;
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double x1, x2, y1, y2, beat_density;
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uint32_t beats = 0;
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uint32_t bars = 0;
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uint32_t color;
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_canvas.get_scroll_region (x1, y1, x2, who_cares);
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_canvas.root()->get_bounds(who_cares, who_cares, who_cares, y2);
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// FIXME use canvas height
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//y2 = TimeAxisView::hLargest*5000; // five thousand largest tracks should be enough.. :)
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//y2 = 500000; // five thousand largest tracks should be enough.. :)
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/* get the first bar spacing */
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i = points.end();
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i--;
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bars = (*i).bar - (*points.begin()).bar;
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beats = points.size() - bars;
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beat_density = (beats * 10.0f) / _canvas.get_width ();
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if (beat_density > 4.0f) {
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/* if the lines are too close together, they become useless
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*/
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return;
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}
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for (i = points.begin(); i != points.end(); ++i) {
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switch ((*i).type) {
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case ARDOUR::TempoMap::Bar:
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break;
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case ARDOUR::TempoMap::Beat:
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if ((*i).beat == 1) {
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color = ARDOUR_UI::config()->canvasvar_MeasureLineBar.get();
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} else {
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color = ARDOUR_UI::config()->canvasvar_MeasureLineBeat.get();
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if (beat_density > 2.0) {
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/* only draw beat lines if the gaps between beats are large.
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*/
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break;
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}
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}
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xpos = rint((*i).frame / (double)frames_per_unit);
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line = get_line ();
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line->property_x1() = xpos;
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line->property_x2() = xpos;
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line->property_y2() = y2;
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line->property_color_rgba() = color;
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//line->raise_to_top();
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line->show();
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break;
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}
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}
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}
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