Session: Use a monotonic clock to measure acquisition time.
[pulseview.git] / view / trace.cpp
1 /*
2  * This file is part of the PulseView project.
3  *
4  * Copyright (C) 2013 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 <assert.h>
24 #include <math.h>
25
26 #include "trace.h"
27 #include "view.h"
28
29 namespace pv {
30 namespace view {
31
32 const QPen Trace::AxisPen(QColor(128, 128, 128, 64));
33 const int Trace::LabelHitPadding = 2;
34
35 Trace::Trace(pv::SigSession &session, QString name) :
36         _session(session),
37         _name(name),
38         _v_offset(0)
39 {
40 }
41
42 QString Trace::get_name() const
43 {
44         return _name;
45 }
46
47 void Trace::set_name(QString name)
48 {
49         _name = name;
50 }
51
52 QColor Trace::get_colour() const
53 {
54         return _colour;
55 }
56
57 void Trace::set_colour(QColor colour)
58 {
59         _colour = colour;
60 }
61
62 int Trace::get_v_offset() const
63 {
64         return _v_offset;
65 }
66
67 void Trace::set_v_offset(int v_offset)
68 {
69         _v_offset = v_offset;
70 }
71
72 void Trace::set_view(pv::view::View *view)
73 {
74         assert(view);
75         _view = view;
76 }
77
78 void Trace::paint_back(QPainter &p, int left, int right)
79 {
80         (void)p;
81         (void)left;
82         (void)right;
83 }
84
85 void Trace::paint_mid(QPainter &p, int left, int right)
86 {
87         (void)p;
88         (void)left;
89         (void)right;
90 }
91
92 void Trace::paint_fore(QPainter &p, int left, int right)
93 {
94         (void)p;
95         (void)left;
96         (void)right;
97 }
98
99 void Trace::paint_label(QPainter &p, int right, bool hover)
100 {
101         assert(_view);
102         const int y = _v_offset - _view->v_offset();
103
104         p.setBrush(_colour);
105
106         if (!enabled())
107                 return;
108
109         const QColor colour = get_colour();
110
111         compute_text_size(p);
112         const QRectF label_rect = get_label_rect(right);
113
114         // Paint the label
115         const QPointF points[] = {
116                 label_rect.topLeft(),
117                 label_rect.topRight(),
118                 QPointF(right, y),
119                 label_rect.bottomRight(),
120                 label_rect.bottomLeft()
121         };
122
123         const QPointF highlight_points[] = {
124                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
125                 QPointF(label_rect.right(), label_rect.top() + 1),
126                 QPointF(right - 1, y),
127                 QPointF(label_rect.right(), label_rect.bottom() - 1),
128                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
129         };
130
131         if (selected()) {
132                 p.setPen(highlight_pen());
133                 p.setBrush(Qt::transparent);
134                 p.drawPolygon(points, countof(points));
135         }
136
137         p.setPen(Qt::transparent);
138         p.setBrush(hover ? colour.lighter() : colour);
139         p.drawPolygon(points, countof(points));
140
141         p.setPen(colour.lighter());
142         p.setBrush(Qt::transparent);
143         p.drawPolygon(highlight_points, countof(highlight_points));
144
145         p.setPen(colour.darker());
146         p.setBrush(Qt::transparent);
147         p.drawPolygon(points, countof(points));
148
149         // Paint the text
150         p.setPen(get_text_colour());
151         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
152 }
153
154 bool Trace::pt_in_label_rect(int left, int right, const QPoint &point)
155 {
156         (void)left;
157
158         const QRectF label = get_label_rect(right);
159         return QRectF(
160                 QPointF(label.left() - LabelHitPadding,
161                         label.top() - LabelHitPadding),
162                 QPointF(right, label.bottom() + LabelHitPadding)
163                         ).contains(point);
164 }
165
166 int Trace::get_y() const
167 {
168         return _v_offset - _view->v_offset();
169 }
170
171 QColor Trace::get_text_colour() const
172 {
173         return (_colour.lightness() > 64) ? Qt::black : Qt::white;
174 }
175
176 void Trace::paint_axis(QPainter &p, int y, int left, int right)
177 {
178         p.setPen(AxisPen);
179         p.drawLine(QPointF(left, y + 0.5f), QPointF(right, y + 0.5f));
180 }
181
182 void Trace::compute_text_size(QPainter &p)
183 {
184         _text_size = QSize(
185                 p.boundingRect(QRectF(), 0, _name).width(),
186                 p.boundingRect(QRectF(), 0, "Tg").height());
187 }
188
189 QRectF Trace::get_label_rect(int right)
190 {
191         using pv::view::View;
192
193         assert(_view);
194         const int y = _v_offset - _view->v_offset();
195
196         const QSizeF label_size(
197                 _text_size.width() + View::LabelPadding.width() * 2,
198                 ceilf((_text_size.height() + View::LabelPadding.height() * 2) / 2) * 2);
199         const float label_arrow_length = label_size.height() / 2;
200         return QRectF(
201                 right - label_arrow_length - label_size.width() - 0.5,
202                 y + 0.5f - label_size.height() / 2,
203                 label_size.width(), label_size.height());
204 }
205
206 } // namespace view
207 } // namespace pv