Fix #626 by stopping acquisition gracefully
[pulseview.git] / pv / view / timemarker.cpp
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 <algorithm>
22
23 #include <extdef.h>
24
25 #include "timemarker.hpp"
26
27 #include "view.hpp"
28
29 #include <QApplication>
30 #include <QFormLayout>
31 #include <QFontMetrics>
32 #include <QPainter>
33
34 #include <pv/widgets/popup.hpp>
35
36 using std::max;
37 using std::min;
38
39 namespace pv {
40 namespace view {
41
42 const int TimeMarker::ArrowSize = 4;
43
44 TimeMarker::TimeMarker(View &view, const QColor &colour, double time) :
45         TimeItem(view),
46         colour_(colour),
47         time_(time),
48         value_action_(nullptr),
49         value_widget_(nullptr),
50         updating_value_widget_(false)
51 {
52 }
53
54 double TimeMarker::time() const
55 {
56         return time_;
57 }
58
59 void TimeMarker::set_time(double time)
60 {
61         time_ = time;
62
63         if (value_widget_) {
64                 updating_value_widget_ = true;
65                 value_widget_->setValue(time);
66                 updating_value_widget_ = false;
67         }
68
69         view_.time_item_appearance_changed(true, true);
70 }
71
72 float TimeMarker::get_x() const
73 {
74         return (time_ - view_.offset()) / view_.scale();
75 }
76
77 QPoint TimeMarker::point(const QRect &rect) const
78 {
79         return QPoint(get_x(), rect.bottom());
80 }
81
82 QRectF TimeMarker::label_rect(const QRectF &rect) const
83 {
84         QFontMetrics m(QApplication::font());
85         const QSizeF text_size(
86                 max(m.boundingRect(get_text()).size().width(), ArrowSize),
87                 m.height());
88         const QSizeF label_size(text_size + LabelPadding * 2);
89         const float top = rect.height() - label_size.height() -
90                 TimeMarker::ArrowSize - 0.5f;
91         const float x = get_x();
92
93         return QRectF(QPointF(x - label_size.width() / 2, top), label_size);
94 }
95
96 QRectF TimeMarker::hit_box_rect(const QRectF &rect) const
97 {
98         const float x = get_x();
99         const float h = QFontMetrics(QApplication::font()).height();
100         return QRectF(x - h / 2.0f, rect.top(), h, rect.height());
101 }
102
103 void TimeMarker::paint_label(QPainter &p, const QRect &rect, bool hover)
104 {
105         if (!enabled())
106                 return;
107
108         const qreal x = (time_ - view_.offset()) / view_.scale();
109         const QRectF r(label_rect(rect));
110
111         const QPointF points[] = {
112                 r.topLeft(),
113                 r.bottomLeft(),
114                 QPointF(max(r.left(), x - ArrowSize), r.bottom()),
115                 QPointF(x, rect.bottom()),
116                 QPointF(min(r.right(), x + ArrowSize), r.bottom()),
117                 r.bottomRight(),
118                 r.topRight()
119         };
120
121         const QPointF highlight_points[] = {
122                 QPointF(r.left() + 1, r.top() + 1),
123                 QPointF(r.left() + 1, r.bottom() - 1),
124                 QPointF(max(r.left() + 1, x - ArrowSize), r.bottom() - 1),
125                 QPointF(min(max(r.left() + 1, x), r.right() - 1),
126                         rect.bottom() - 1),
127                 QPointF(min(r.right() - 1, x + ArrowSize), r.bottom() - 1),
128                 QPointF(r.right() - 1, r.bottom() - 1),
129                 QPointF(r.right() - 1, r.top() + 1),
130         };
131
132         if (selected()) {
133                 p.setPen(highlight_pen());
134                 p.setBrush(Qt::transparent);
135                 p.drawPolygon(points, countof(points));
136         }
137
138         p.setPen(Qt::transparent);
139         p.setBrush(hover ? colour_.lighter() : colour_);
140         p.drawPolygon(points, countof(points));
141
142         p.setPen(colour_.lighter());
143         p.setBrush(Qt::transparent);
144         p.drawPolygon(highlight_points, countof(highlight_points));
145
146         p.setPen(colour_.darker());
147         p.setBrush(Qt::transparent);
148         p.drawPolygon(points, countof(points));
149
150         p.setPen(select_text_colour(colour_));
151         p.drawText(r, Qt::AlignCenter | Qt::AlignVCenter, get_text());
152 }
153
154 void TimeMarker::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
155 {
156         if (!enabled())
157                 return;
158
159         const float x = get_x();
160         p.setPen(colour_.darker());
161         p.drawLine(QPointF(x, pp.top()), QPointF(x, pp.bottom()));
162 }
163
164 pv::widgets::Popup* TimeMarker::create_popup(QWidget *parent)
165 {
166         using pv::widgets::Popup;
167
168         Popup *const popup = new Popup(parent);
169         popup->set_position(parent->mapToGlobal(
170                 point(parent->rect())), Popup::Bottom);
171
172         QFormLayout *const form = new QFormLayout(popup);
173         popup->setLayout(form);
174
175         value_widget_ = new QDoubleSpinBox(parent);
176         value_widget_->setDecimals(9);
177         value_widget_->setSuffix("s");
178         value_widget_->setSingleStep(1e-6);
179         value_widget_->setRange(-1.0e9, 1.0e9);
180         value_widget_->setValue(time_);
181
182         connect(value_widget_, SIGNAL(valueChanged(double)),
183                 this, SLOT(on_value_changed(double)));
184
185         form->addRow(tr("Time"), value_widget_);
186
187         return popup;
188 }
189
190 void TimeMarker::on_value_changed(double value)
191 {
192         if (!updating_value_widget_)
193                 set_time(value);
194 }
195
196 } // namespace view
197 } // namespace pv