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
|
/*
Copyright (C) 2014 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 __CANVAS_RULER_H__
#define __CANVAS_RULER_H__
#include <string>
#include <vector>
#include <pangomm/fontdescription.h>
#include "canvas/rectangle.h"
namespace ArdourCanvas
{
class LIBCANVAS_API Ruler : public Rectangle
{
public:
struct Mark {
enum Style {
Major,
Minor,
Micro
};
std::string label;
double position;
Style style;
};
struct Metric {
Metric () : units_per_pixel (0) {}
virtual ~Metric() {}
double units_per_pixel;
/* lower and upper and sample positions, which are also canvas coordinates
*/
virtual void get_marks (std::vector<Mark>&, double lower, double upper, int maxchars) const = 0;
};
Ruler (Canvas*, const Metric& m);
Ruler (Canvas*, const Metric& m, Rect const&);
Ruler (Item*, const Metric& m);
Ruler (Item*, const Metric& m, Rect const&);
virtual ~Ruler () {
delete _font_description;
}
void set_range (double lower, double upper);
void set_font_description (Pango::FontDescription);
void set_metric (const Metric&);
void render (Rect const & area, Cairo::RefPtr<Cairo::Context>) const;
void set_divide_colors (Color top, Color bottom);
void set_divide_height (double);
private:
const Metric* _metric;
/* lower and upper and sample positions, which are also canvas coordinates
*/
Coord _lower;
Coord _upper;
double _divide_height;
Color _divider_color_top;
Color _divider_color_bottom;
Pango::FontDescription* _font_description;
mutable std::vector<Mark> marks;
mutable bool _need_marks;
};
}
#endif
|
