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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 | #include "cursor.hpp" | |
22 | ||
23 | #include "view.hpp" | |
24 | #include "pv/util.hpp" | |
25 | ||
26 | #include <QApplication> | |
27 | #include <QBrush> | |
28 | #include <QPainter> | |
29 | #include <QPointF> | |
30 | #include <QRect> | |
31 | #include <QRectF> | |
32 | ||
33 | #include <cassert> | |
34 | #include <cstdio> | |
35 | #include <limits> | |
36 | ||
37 | using std::abs; | |
38 | using std::shared_ptr; | |
39 | using std::numeric_limits; | |
40 | ||
41 | namespace pv { | |
42 | namespace view { | |
43 | ||
44 | const QColor Cursor::FillColour(52, 101, 164); | |
45 | ||
46 | Cursor::Cursor(View &view, double time) : | |
47 | TimeMarker(view, FillColour, time) | |
48 | { | |
49 | } | |
50 | ||
51 | bool Cursor::enabled() const | |
52 | { | |
53 | return view_.cursors_shown(); | |
54 | } | |
55 | ||
56 | QString Cursor::get_text() const | |
57 | { | |
58 | return pv::util::format_time(time_, view_.tick_prefix(), 2); | |
59 | } | |
60 | ||
61 | QRectF Cursor::label_rect(const QRectF &rect) const | |
62 | { | |
63 | const shared_ptr<Cursor> other(get_other_cursor()); | |
64 | assert(other); | |
65 | ||
66 | const float x = (time_ - view_.offset()) / view_.scale(); | |
67 | ||
68 | QFontMetrics m(QApplication::font()); | |
69 | QSize text_size = m.boundingRect(get_text()).size(); | |
70 | ||
71 | const QSizeF label_size( | |
72 | text_size.width() + LabelPadding.width() * 2, | |
73 | text_size.height() + LabelPadding.height() * 2); | |
74 | const float top = rect.height() - label_size.height() - | |
75 | TimeMarker::ArrowSize - 0.5f; | |
76 | const float height = label_size.height(); | |
77 | ||
78 | const double other_time = other->time(); | |
79 | if (time_ > other_time || | |
80 | (abs(time_ - other_time) < numeric_limits<double>::epsilon() && | |
81 | this > other.get())) | |
82 | return QRectF(x, top, label_size.width(), height); | |
83 | else | |
84 | return QRectF(x - label_size.width(), top, | |
85 | label_size.width(), height); | |
86 | } | |
87 | ||
88 | shared_ptr<Cursor> Cursor::get_other_cursor() const | |
89 | { | |
90 | const shared_ptr<CursorPair> cursors(view_.cursors()); | |
91 | assert(cursors); | |
92 | return (cursors->first().get() == this) ? | |
93 | cursors->second() : cursors->first(); | |
94 | } | |
95 | ||
96 | } // namespace view | |
97 | } // namespace pv |