1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
|
/*
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 <libgnomecanvasmm/canvas.h>
#include <libgnomecanvasmm/group.h>
#include "tempo_lines.h"
#include "ardour_ui.h"
ArdourCanvas::SimpleLine *
TempoLines::get_line ()
{
ArdourCanvas::SimpleLine *line;
if (_free_lines.empty()) {
line = new ArdourCanvas::SimpleLine (*_group);
_used_lines.push_back (line);
} else {
line = _free_lines.front();
_free_lines.erase (_free_lines.begin());
_used_lines.push_back (line);
}
return line;
}
void
TempoLines::hide ()
{
for (Lines::iterator i = _used_lines.begin(); i != _used_lines.end(); ++i) {
(*i)->hide();
_free_lines.push_back (*i);
}
_used_lines.clear ();
}
void
TempoLines::draw (ARDOUR::TempoMap::BBTPointList& points, double frames_per_unit)
{
ARDOUR::TempoMap::BBTPointList::iterator i;
ArdourCanvas::SimpleLine *line;
gdouble xpos;
double who_cares;
double x1, x2, y1, y2, beat_density;
uint32_t beats = 0;
uint32_t bars = 0;
uint32_t color;
_canvas.get_scroll_region (x1, y1, x2, who_cares);
_canvas.root()->get_bounds(who_cares, who_cares, who_cares, y2);
// FIXME use canvas height
//y2 = TimeAxisView::hLargest*5000; // five thousand largest tracks should be enough.. :)
//y2 = 500000; // five thousand largest tracks should be enough.. :)
/* get the first bar spacing */
i = points.end();
i--;
bars = (*i).bar - (*points.begin()).bar;
beats = points.size() - bars;
beat_density = (beats * 10.0f) / _canvas.get_width ();
if (beat_density > 4.0f) {
/* if the lines are too close together, they become useless
*/
return;
}
for (i = points.begin(); i != points.end(); ++i) {
switch ((*i).type) {
case ARDOUR::TempoMap::Bar:
break;
case ARDOUR::TempoMap::Beat:
if ((*i).beat == 1) {
color = ARDOUR_UI::config()->canvasvar_MeasureLineBar.get();
} else {
color = ARDOUR_UI::config()->canvasvar_MeasureLineBeat.get();
if (beat_density > 2.0) {
/* only draw beat lines if the gaps between beats are large.
*/
break;
}
}
xpos = rint((*i).frame / (double)frames_per_unit);
line = get_line ();
line->property_x1() = xpos;
line->property_x2() = xpos;
line->property_y2() = y2;
line->property_color_rgba() = color;
//line->raise_to_top();
line->show();
break;
}
}
}
|
