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 <QFormLayout>
  30 #include <QPainter>
  31
  32 #include <pv/util.hpp>
  33 #include <pv/widgets/popup.hpp>
  34
  35 using std::max;
  36 using std::min;
  37
  38 namespace pv {
  39 namespace view {
  40
  41 const int TimeMarker::ArrowSize = 4;
  42 const int TimeMarker::Offset = 1;
  43
  44 TimeMarker::TimeMarker(View &view, const QColor &colour, double time) :
  45         view_(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 float TimeMarker::get_x() const
  60 {
  61         return (time_ - view_.offset()) / view_.scale();
  62 }
  63
  64 QPoint TimeMarker::point() const
  65 {
  66         return QPoint(get_x(), 0);
  67 }
  68
  69 void TimeMarker::set_time(double time)
  70 {
  71         time_ = time;
  72
  73         if (value_widget_) {
  74                 updating_value_widget_ = true;
  75                 value_widget_->setValue(time);
  76                 updating_value_widget_ = false;
  77         }
  78
  79         time_changed();
  80 }
  81
  82 void TimeMarker::paint(QPainter &p, const QRect &rect)
  83 {
  84         const float x = get_x();
  85         p.setPen(colour_.darker());
  86         p.drawLine(QPointF(x, rect.top()), QPointF(x, rect.bottom()));
  87 }
  88
  89 void TimeMarker::paint_label(QPainter &p, const QRect &rect)
  90 {
  91         const qreal x = (time_ - view_.offset()) / view_.scale();
  92         const QRectF r(get_label_rect(rect));
  93
  94         const QPointF points[] = {
  95                 r.topLeft(),
  96                 r.bottomLeft(),
  97                 QPointF(max(r.left(), x - ArrowSize), r.bottom()),
  98                 QPointF(x, rect.bottom()),
  99                 QPointF(min(r.right(), x + ArrowSize), r.bottom()),
 100                 r.bottomRight(),
 101                 r.topRight()
 102         };
 103
 104         const QPointF highlight_points[] = {
 105                 QPointF(r.left() + 1, r.top() + 1),
 106                 QPointF(r.left() + 1, r.bottom() - 1),
 107                 QPointF(max(r.left() + 1, x - ArrowSize), r.bottom() - 1),
 108                 QPointF(min(max(r.left() + 1, x), r.right() - 1),
 109                         rect.bottom() - 1),
 110                 QPointF(min(r.right() - 1, x + ArrowSize), r.bottom() - 1),
 111                 QPointF(r.right() - 1, r.bottom() - 1),
 112                 QPointF(r.right() - 1, r.top() + 1),
 113         };
 114
 115         if (selected()) {
 116                 p.setPen(highlight_pen());
 117                 p.setBrush(Qt::transparent);
 118                 p.drawPolygon(points, countof(points));
 119         }
 120
 121         p.setPen(Qt::transparent);
 122         p.setBrush(colour_);
 123         p.drawPolygon(points, countof(points));
 124
 125         p.setPen(colour_.lighter());
 126         p.setBrush(Qt::transparent);
 127         p.drawPolygon(highlight_points, countof(highlight_points));
 128
 129         p.setPen(colour_.darker());
 130         p.setBrush(Qt::transparent);
 131         p.drawPolygon(points, countof(points));
 132
 133         p.setPen(select_text_colour(colour_));
 134         p.drawText(r, Qt::AlignCenter | Qt::AlignVCenter,
 135                 pv::util::format_time(time_, view_.tick_prefix(), 2));
 136 }
 137
 138 pv::widgets::Popup* TimeMarker::create_popup(QWidget *parent)
 139 {
 140         using pv::widgets::Popup;
 141
 142         Popup *const popup = new Popup(parent);
 143         QFormLayout *const form = new QFormLayout(popup);
 144         popup->setLayout(form);
 145
 146         value_widget_ = new QDoubleSpinBox(parent);
 147         value_widget_->setDecimals(9);
 148         value_widget_->setSuffix("s");
 149         value_widget_->setSingleStep(1e-6);
 150         value_widget_->setRange(-1.0e9, 1.0e9);
 151         value_widget_->setValue(time_);
 152
 153         connect(value_widget_, SIGNAL(valueChanged(double)),
 154                 this, SLOT(on_value_changed(double)));
 155
 156         form->addRow(tr("Time"), value_widget_);
 157
 158         return popup;
 159 }
 160
 161 void TimeMarker::on_value_changed(double value)
 162 {
 163         if (!updating_value_widget_) {
 164                 time_ = value;
 165                 time_changed();
 166         }
 167 }
 168
 169 } // namespace view
 170 } // namespace pv