RowItem: Fixed v_extents initial conditions
[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 const int TimeMarker::Offset = 1;
44
45 TimeMarker::TimeMarker(View &view, const QColor &colour, double time) :
46         TimeItem(view),
47         colour_(colour),
48         time_(time),
49         value_action_(NULL),
50         value_widget_(NULL),
51         updating_value_widget_(false)
52 {
53 }
54
55 double TimeMarker::time() const
56 {
57         return time_;
58 }
59
60 float TimeMarker::get_x() const
61 {
62         return (time_ - view_.offset()) / view_.scale();
63 }
64
65 QPoint TimeMarker::point() const
66 {
67         return QPoint(get_x(), 0);
68 }
69
70 void TimeMarker::set_time(double time)
71 {
72         time_ = time;
73
74         if (value_widget_) {
75                 updating_value_widget_ = true;
76                 value_widget_->setValue(time);
77                 updating_value_widget_ = false;
78         }
79
80         time_changed();
81 }
82
83 void TimeMarker::paint(QPainter &p, const QRect &rect)
84 {
85         const float x = get_x();
86         p.setPen(colour_.darker());
87         p.drawLine(QPointF(x, rect.top()), QPointF(x, rect.bottom()));
88 }
89
90 QRectF TimeMarker::label_rect(const QRectF &rect) const
91 {
92         const float x = (time_ - view_.offset()) / view_.scale();
93
94         QFontMetrics m(QApplication::font());
95         const float text_width =
96                 max(m.boundingRect(get_text()).size().width(), ArrowSize);
97         const float text_height = m.boundingRect("Tg").size().height();
98
99         const QSizeF label_size(
100                 text_width + View::LabelPadding.width() * 2,
101                 text_height + View::LabelPadding.height() * 2);
102         const float top = rect.height() - label_size.height() -
103                 TimeMarker::Offset - TimeMarker::ArrowSize - 0.5f;
104         const float height = label_size.height();
105
106         return QRectF(x - label_size.width() / 2, top,
107                 label_size.width(), height);
108 }
109
110 void TimeMarker::paint_label(QPainter &p, const QRect &rect)
111 {
112         if (!enabled())
113                 return;
114
115         const qreal x = (time_ - view_.offset()) / view_.scale();
116         const QRectF r(label_rect(rect));
117
118         const QPointF points[] = {
119                 r.topLeft(),
120                 r.bottomLeft(),
121                 QPointF(max(r.left(), x - ArrowSize), r.bottom()),
122                 QPointF(x, rect.bottom()),
123                 QPointF(min(r.right(), x + ArrowSize), r.bottom()),
124                 r.bottomRight(),
125                 r.topRight()
126         };
127
128         const QPointF highlight_points[] = {
129                 QPointF(r.left() + 1, r.top() + 1),
130                 QPointF(r.left() + 1, r.bottom() - 1),
131                 QPointF(max(r.left() + 1, x - ArrowSize), r.bottom() - 1),
132                 QPointF(min(max(r.left() + 1, x), r.right() - 1),
133                         rect.bottom() - 1),
134                 QPointF(min(r.right() - 1, x + ArrowSize), r.bottom() - 1),
135                 QPointF(r.right() - 1, r.bottom() - 1),
136                 QPointF(r.right() - 1, r.top() + 1),
137         };
138
139         if (selected()) {
140                 p.setPen(highlight_pen());
141                 p.setBrush(Qt::transparent);
142                 p.drawPolygon(points, countof(points));
143         }
144
145         p.setPen(Qt::transparent);
146         p.setBrush(colour_);
147         p.drawPolygon(points, countof(points));
148
149         p.setPen(colour_.lighter());
150         p.setBrush(Qt::transparent);
151         p.drawPolygon(highlight_points, countof(highlight_points));
152
153         p.setPen(colour_.darker());
154         p.setBrush(Qt::transparent);
155         p.drawPolygon(points, countof(points));
156
157         p.setPen(select_text_colour(colour_));
158         p.drawText(r, Qt::AlignCenter | Qt::AlignVCenter, get_text());
159 }
160
161 pv::widgets::Popup* TimeMarker::create_popup(QWidget *parent)
162 {
163         using pv::widgets::Popup;
164
165         Popup *const popup = new Popup(parent);
166         QFormLayout *const form = new QFormLayout(popup);
167         popup->setLayout(form);
168
169         value_widget_ = new QDoubleSpinBox(parent);
170         value_widget_->setDecimals(9);
171         value_widget_->setSuffix("s");
172         value_widget_->setSingleStep(1e-6);
173         value_widget_->setRange(-1.0e9, 1.0e9);
174         value_widget_->setValue(time_);
175
176         connect(value_widget_, SIGNAL(valueChanged(double)),
177                 this, SLOT(on_value_changed(double)));
178
179         form->addRow(tr("Time"), value_widget_);
180
181         return popup;
182 }
183
184 void TimeMarker::on_value_changed(double value)
185 {
186         if (!updating_value_widget_) {
187                 time_ = value;
188                 time_changed();
189         }
190 }
191
192 } // namespace view
193 } // namespace pv