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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 <extdef.h> | |
22 | ||
23 | #include "signal.h" | |
24 | ||
25 | namespace pv { | |
26 | ||
27 | const QSizeF Signal::LabelPadding(4, 0); | |
28 | const int Signal::LabelHitPadding = 2; | |
29 | ||
30 | Signal::Signal(QString name) : | |
31 | _name(name) | |
32 | { | |
33 | } | |
34 | ||
35 | QString Signal::get_name() const | |
36 | { | |
37 | return _name; | |
38 | } | |
39 | ||
40 | void Signal::set_name(QString name) | |
41 | { | |
42 | _name = name; | |
43 | } | |
44 | ||
45 | void Signal::paint_label(QPainter &p, const QRect &rect, bool hover) | |
46 | { | |
47 | p.setBrush(get_colour()); | |
48 | ||
49 | const QColor colour = get_colour(); | |
50 | const float nominal_offset = get_nominal_offset(rect); | |
51 | ||
52 | compute_text_size(p); | |
53 | const QRectF label_rect = get_label_rect(rect); | |
54 | ||
55 | // Paint the label | |
56 | const QPointF points[] = { | |
57 | label_rect.topLeft(), | |
58 | label_rect.topRight(), | |
59 | QPointF(rect.right(), nominal_offset), | |
60 | label_rect.bottomRight(), | |
61 | label_rect.bottomLeft() | |
62 | }; | |
63 | ||
64 | const QPointF highlight_points[] = { | |
65 | QPointF(label_rect.left() + 1, label_rect.top() + 1), | |
66 | QPointF(label_rect.right(), label_rect.top() + 1), | |
67 | QPointF(rect.right() - 1, nominal_offset), | |
68 | QPointF(label_rect.right(), label_rect.bottom() - 1), | |
69 | QPointF(label_rect.left() + 1, label_rect.bottom() - 1) | |
70 | }; | |
71 | ||
72 | p.setPen(Qt::transparent); | |
73 | p.setBrush(hover ? colour.lighter() : colour); | |
74 | p.drawPolygon(points, countof(points)); | |
75 | ||
76 | p.setPen(colour.lighter()); | |
77 | p.setBrush(Qt::transparent); | |
78 | p.drawPolygon(highlight_points, countof(highlight_points)); | |
79 | ||
80 | p.setPen(colour.darker()); | |
81 | p.setBrush(Qt::transparent); | |
82 | p.drawPolygon(points, countof(points)); | |
83 | ||
84 | // Paint the text | |
85 | p.setPen((colour.lightness() > 64) ? Qt::black : Qt::white); | |
86 | p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name); | |
87 | } | |
88 | ||
89 | bool Signal::pt_in_label_rect(const QRect &rect, const QPoint &point) | |
90 | { | |
91 | const QRectF label = get_label_rect(rect); | |
92 | return QRectF( | |
93 | QPointF(label.left() - LabelHitPadding, | |
94 | label.top() - LabelHitPadding), | |
95 | QPointF(rect.right(), | |
96 | label.bottom() + LabelHitPadding) | |
97 | ).contains(point); | |
98 | } | |
99 | ||
100 | void Signal::compute_text_size(QPainter &p) | |
101 | { | |
102 | _text_size = p.boundingRect(QRectF(), 0, _name).size(); | |
103 | } | |
104 | ||
105 | QRectF Signal::get_label_rect(const QRect &rect) | |
106 | { | |
107 | const float nominal_offset = get_nominal_offset(rect); | |
108 | const QSizeF label_size( | |
109 | _text_size.width() + LabelPadding.width() * 2, | |
110 | _text_size.height() + LabelPadding.height() * 2); | |
111 | const float label_arrow_length = label_size.height() / 2; | |
112 | return QRectF( | |
113 | rect.right() - label_arrow_length - label_size.width(), | |
114 | nominal_offset - label_size.height() / 2, | |
115 | label_size.width(), label_size.height()); | |
116 | } | |
117 | ||
118 | } // namespace pv |