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