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         view_(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::get_label_rect(const QRect &rect) const
  91 {
  92         const float x = (time_ - view_.offset()) / view_.scale();
  93
  94         QFontMetrics m(QApplication::font());
  95         QSize text_size = m.boundingRect(get_text()).size();
  96
  97         const QSizeF label_size(
  98                 text_size.width() + View::LabelPadding.width() * 2,
  99                 text_size.height() + View::LabelPadding.height() * 2);
 100         const float top = rect.height() - label_size.height() -
 101                 TimeMarker::Offset - TimeMarker::ArrowSize - 0.5f;
 102         const float height = label_size.height();
 103
 104         return QRectF(x - label_size.width() / 2 - 0.5f, top,
 105                 label_size.width(), height);
 106 }
 107
 108 void TimeMarker::paint_label(QPainter &p, const QRect &rect)
 109 {
 110         if (!enabled())
 111                 return;
 112
 113         const qreal x = (time_ - view_.offset()) / view_.scale();
 114         const QRectF r(get_label_rect(rect));
 115
 116         const QPointF points[] = {
 117                 r.topLeft(),
 118                 r.bottomLeft(),
 119                 QPointF(max(r.left(), x - ArrowSize), r.bottom()),
 120                 QPointF(x, rect.bottom()),
 121                 QPointF(min(r.right(), x + ArrowSize), r.bottom()),
 122                 r.bottomRight(),
 123                 r.topRight()
 124         };
 125
 126         const QPointF highlight_points[] = {
 127                 QPointF(r.left() + 1, r.top() + 1),
 128                 QPointF(r.left() + 1, r.bottom() - 1),
 129                 QPointF(max(r.left() + 1, x - ArrowSize), r.bottom() - 1),
 130                 QPointF(min(max(r.left() + 1, x), r.right() - 1),
 131                         rect.bottom() - 1),
 132                 QPointF(min(r.right() - 1, x + ArrowSize), r.bottom() - 1),
 133                 QPointF(r.right() - 1, r.bottom() - 1),
 134                 QPointF(r.right() - 1, r.top() + 1),
 135         };
 136
 137         if (selected()) {
 138                 p.setPen(highlight_pen());
 139                 p.setBrush(Qt::transparent);
 140                 p.drawPolygon(points, countof(points));
 141         }
 142
 143         p.setPen(Qt::transparent);
 144         p.setBrush(colour_);
 145         p.drawPolygon(points, countof(points));
 146
 147         p.setPen(colour_.lighter());
 148         p.setBrush(Qt::transparent);
 149         p.drawPolygon(highlight_points, countof(highlight_points));
 150
 151         p.setPen(colour_.darker());
 152         p.setBrush(Qt::transparent);
 153         p.drawPolygon(points, countof(points));
 154
 155         p.setPen(select_text_colour(colour_));
 156         p.drawText(r, Qt::AlignCenter | Qt::AlignVCenter, get_text());
 157 }
 158
 159 pv::widgets::Popup* TimeMarker::create_popup(QWidget *parent)
 160 {
 161         using pv::widgets::Popup;
 162
 163         Popup *const popup = new Popup(parent);
 164         QFormLayout *const form = new QFormLayout(popup);
 165         popup->setLayout(form);
 166
 167         value_widget_ = new QDoubleSpinBox(parent);
 168         value_widget_->setDecimals(9);
 169         value_widget_->setSuffix("s");
 170         value_widget_->setSingleStep(1e-6);
 171         value_widget_->setRange(-1.0e9, 1.0e9);
 172         value_widget_->setValue(time_);
 173
 174         connect(value_widget_, SIGNAL(valueChanged(double)),
 175                 this, SLOT(on_value_changed(double)));
 176
 177         form->addRow(tr("Time"), value_widget_);
 178
 179         return popup;
 180 }
 181
 182 void TimeMarker::on_value_changed(double value)
 183 {
 184         if (!updating_value_widget_) {
 185                 time_ = value;
 186                 time_changed();
 187         }
 188 }
 189
 190 } // namespace view
 191 } // namespace pv