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1 | /* | |
2 | * This file is part of the PulseView project. | |
3 | * | |
4 | * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk> | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License, or | |
9 | * (at your option) any later version. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * along with this program; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
21 | extern "C" { | |
22 | #include <libsigrokdecode/libsigrokdecode.h> | |
23 | } | |
24 | ||
25 | #include <extdef.h> | |
26 | ||
27 | #include <algorithm> | |
28 | ||
29 | #include <QPainter> | |
30 | ||
31 | #include "annotation.h" | |
32 | ||
33 | using namespace boost; | |
34 | using namespace std; | |
35 | ||
36 | namespace pv { | |
37 | namespace view { | |
38 | namespace decode { | |
39 | ||
40 | const double Annotation::EndCapWidth = 5; | |
41 | ||
42 | Annotation::Annotation(const srd_proto_data *const pdata) : | |
43 | _start_sample(pdata->start_sample), | |
44 | _end_sample(pdata->end_sample) | |
45 | { | |
46 | const char *const *annotations = (char**)pdata->data; | |
47 | while(*annotations) { | |
48 | _annotations.push_back(QString(*annotations)); | |
49 | annotations++; | |
50 | } | |
51 | } | |
52 | ||
53 | void Annotation::paint(QPainter &p, QColor fill, QColor outline, | |
54 | QColor text_color, int text_height, int left, int right, | |
55 | double samples_per_pixel, double pixels_offset, int y) | |
56 | { | |
57 | const int h = (text_height * 3) / 2; | |
58 | ||
59 | const double start = _start_sample / samples_per_pixel - | |
60 | pixels_offset; | |
61 | const double end = _end_sample / samples_per_pixel - | |
62 | pixels_offset; | |
63 | ||
64 | if (start > right || end < left) | |
65 | return; | |
66 | ||
67 | const double cap_width = min((end - start) / 2, EndCapWidth); | |
68 | ||
69 | QPointF pts[] = { | |
70 | QPointF(start, y + .5f), | |
71 | QPointF(start + cap_width, y + .5f - h / 2), | |
72 | QPointF(end - cap_width, y + .5f - h / 2), | |
73 | QPointF(end, y + .5f), | |
74 | QPointF(end - cap_width, y + .5f + h / 2), | |
75 | QPointF(start + cap_width, y + .5f + h / 2) | |
76 | }; | |
77 | ||
78 | p.setPen(outline); | |
79 | p.setBrush(fill); | |
80 | p.drawConvexPolygon(pts, countof(pts)); | |
81 | ||
82 | if (_annotations.empty()) | |
83 | return; | |
84 | ||
85 | QRectF rect(start + cap_width, y - h / 2, | |
86 | end - start - cap_width * 2, h); | |
87 | p.setPen(text_color); | |
88 | ||
89 | // Try to find an annotation that will fit | |
90 | QString best_annotation; | |
91 | int best_width = 0; | |
92 | ||
93 | BOOST_FOREACH(QString &a, _annotations) { | |
94 | const int w = p.boundingRect(QRectF(), 0, a).width(); | |
95 | if (w <= rect.width() && w > best_width) | |
96 | best_annotation = a, best_width = w; | |
97 | } | |
98 | ||
99 | if (best_annotation.isEmpty()) | |
100 | best_annotation = _annotations.back(); | |
101 | ||
102 | // If not ellide the last in the list | |
103 | p.drawText(rect, Qt::AlignCenter, p.fontMetrics().elidedText( | |
104 | best_annotation, Qt::ElideRight, rect.width())); | |
105 | } | |
106 | ||
107 | } // namespace decode | |
108 | } // namespace view | |
109 | } // namespace pv |