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