MarginWidget: Added pure-virtual get_mouse_over_item
[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_(NULL),
49         value_widget_(NULL),
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 = (time_ - view_.offset()) / view_.scale();
92
93         return QRectF(QPointF(x - label_size.width() / 2, top), label_size);
94 }
95
96 void TimeMarker::paint_label(QPainter &p, const QRect &rect, bool hover)
97 {
98         if (!enabled())
99                 return;
100
101         const qreal x = (time_ - view_.offset()) / view_.scale();
102         const QRectF r(label_rect(rect));
103
104         const QPointF points[] = {
105                 r.topLeft(),
106                 r.bottomLeft(),
107                 QPointF(max(r.left(), x - ArrowSize), r.bottom()),
108                 QPointF(x, rect.bottom()),
109                 QPointF(min(r.right(), x + ArrowSize), r.bottom()),
110                 r.bottomRight(),
111                 r.topRight()
112         };
113
114         const QPointF highlight_points[] = {
115                 QPointF(r.left() + 1, r.top() + 1),
116                 QPointF(r.left() + 1, r.bottom() - 1),
117                 QPointF(max(r.left() + 1, x - ArrowSize), r.bottom() - 1),
118                 QPointF(min(max(r.left() + 1, x), r.right() - 1),
119                         rect.bottom() - 1),
120                 QPointF(min(r.right() - 1, x + ArrowSize), r.bottom() - 1),
121                 QPointF(r.right() - 1, r.bottom() - 1),
122                 QPointF(r.right() - 1, r.top() + 1),
123         };
124
125         if (selected()) {
126                 p.setPen(highlight_pen());
127                 p.setBrush(Qt::transparent);
128                 p.drawPolygon(points, countof(points));
129         }
130
131         p.setPen(Qt::transparent);
132         p.setBrush(hover ? colour_.lighter() : colour_);
133         p.drawPolygon(points, countof(points));
134
135         p.setPen(colour_.lighter());
136         p.setBrush(Qt::transparent);
137         p.drawPolygon(highlight_points, countof(highlight_points));
138
139         p.setPen(colour_.darker());
140         p.setBrush(Qt::transparent);
141         p.drawPolygon(points, countof(points));
142
143         p.setPen(select_text_colour(colour_));
144         p.drawText(r, Qt::AlignCenter | Qt::AlignVCenter, get_text());
145 }
146
147 void TimeMarker::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
148 {
149         if (!enabled())
150                 return;
151
152         const float x = get_x();
153         p.setPen(colour_.darker());
154         p.drawLine(QPointF(x, pp.top()), QPointF(x, pp.bottom()));
155 }
156
157 pv::widgets::Popup* TimeMarker::create_popup(QWidget *parent)
158 {
159         using pv::widgets::Popup;
160
161         Popup *const popup = new Popup(parent);
162         popup->set_position(parent->mapToGlobal(
163                 point(parent->rect())), Popup::Bottom);
164
165         QFormLayout *const form = new QFormLayout(popup);
166         popup->setLayout(form);
167
168         value_widget_ = new QDoubleSpinBox(parent);
169         value_widget_->setDecimals(9);
170         value_widget_->setSuffix("s");
171         value_widget_->setSingleStep(1e-6);
172         value_widget_->setRange(-1.0e9, 1.0e9);
173         value_widget_->setValue(time_);
174
175         connect(value_widget_, SIGNAL(valueChanged(double)),
176                 this, SLOT(on_value_changed(double)));
177
178         form->addRow(tr("Time"), value_widget_);
179
180         return popup;
181 }
182
183 void TimeMarker::on_value_changed(double value)
184 {
185         if (!updating_value_widget_)
186                 set_time(value);
187 }
188
189 } // namespace view
190 } // namespace pv