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         TimeItem(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 void TimeMarker::set_time(double time)
  61 {
  62         time_ = time;
  63
  64         if (value_widget_) {
  65                 updating_value_widget_ = true;
  66                 value_widget_->setValue(time);
  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();
  76 }
  77
  78 QPoint TimeMarker::point() const
  79 {
  80         return QPoint(get_x(), 0);
  81 }
  82
  83 QRectF TimeMarker::label_rect(const QRectF &rect) const
  84 {
  85         const float x = (time_ - view_.offset()) / view_.scale();
  86
  87         QFontMetrics m(QApplication::font());
  88         const float text_width =
  89                 max(m.boundingRect(get_text()).size().width(), ArrowSize);
  90         const float text_height = m.boundingRect("Tg").size().height();
  91
  92         const QSizeF label_size(
  93                 text_width + View::LabelPadding.width() * 2,
  94                 text_height + View::LabelPadding.height() * 2);
  95         const float top = rect.height() - label_size.height() -
  96                 TimeMarker::Offset - TimeMarker::ArrowSize - 0.5f;
  97         const float height = label_size.height();
  98
  99         return QRectF(x - label_size.width() / 2, top,
 100                 label_size.width(), height);
 101 }
 102
 103 void TimeMarker::paint_label(QPainter &p, const QRect &rect)
 104 {
 105         if (!enabled())
 106                 return;
 107
 108         const qreal x = (time_ - view_.offset()) / view_.scale();
 109         const QRectF r(label_rect(rect));
 110
 111         const QPointF points[] = {
 112                 r.topLeft(),
 113                 r.bottomLeft(),
 114                 QPointF(max(r.left(), x - ArrowSize), r.bottom()),
 115                 QPointF(x, rect.bottom()),
 116                 QPointF(min(r.right(), x + ArrowSize), r.bottom()),
 117                 r.bottomRight(),
 118                 r.topRight()
 119         };
 120
 121         const QPointF highlight_points[] = {
 122                 QPointF(r.left() + 1, r.top() + 1),
 123                 QPointF(r.left() + 1, r.bottom() - 1),
 124                 QPointF(max(r.left() + 1, x - ArrowSize), r.bottom() - 1),
 125                 QPointF(min(max(r.left() + 1, x), r.right() - 1),
 126                         rect.bottom() - 1),
 127                 QPointF(min(r.right() - 1, x + ArrowSize), r.bottom() - 1),
 128                 QPointF(r.right() - 1, r.bottom() - 1),
 129                 QPointF(r.right() - 1, r.top() + 1),
 130         };
 131
 132         if (selected()) {
 133                 p.setPen(highlight_pen());
 134                 p.setBrush(Qt::transparent);
 135                 p.drawPolygon(points, countof(points));
 136         }
 137
 138         p.setPen(Qt::transparent);
 139         p.setBrush(colour_);
 140         p.drawPolygon(points, countof(points));
 141
 142         p.setPen(colour_.lighter());
 143         p.setBrush(Qt::transparent);
 144         p.drawPolygon(highlight_points, countof(highlight_points));
 145
 146         p.setPen(colour_.darker());
 147         p.setBrush(Qt::transparent);
 148         p.drawPolygon(points, countof(points));
 149
 150         p.setPen(select_text_colour(colour_));
 151         p.drawText(r, Qt::AlignCenter | Qt::AlignVCenter, get_text());
 152 }
 153
 154 void TimeMarker::paint_fore(QPainter &p, const ViewItemPaintParams &pp)
 155 {
 156         if (!enabled())
 157                 return;
 158
 159         const float x = get_x();
 160         p.setPen(colour_.darker());
 161         p.drawLine(QPointF(x, pp.top()), QPointF(x, pp.bottom()));
 162 }
 163
 164 pv::widgets::Popup* TimeMarker::create_popup(QWidget *parent)
 165 {
 166         using pv::widgets::Popup;
 167
 168         Popup *const popup = new Popup(parent);
 169         QFormLayout *const form = new QFormLayout(popup);
 170         popup->setLayout(form);
 171
 172         value_widget_ = new QDoubleSpinBox(parent);
 173         value_widget_->setDecimals(9);
 174         value_widget_->setSuffix("s");
 175         value_widget_->setSingleStep(1e-6);
 176         value_widget_->setRange(-1.0e9, 1.0e9);
 177         value_widget_->setValue(time_);
 178
 179         connect(value_widget_, SIGNAL(valueChanged(double)),
 180                 this, SLOT(on_value_changed(double)));
 181
 182         form->addRow(tr("Time"), value_widget_);
 183
 184         return popup;
 185 }
 186
 187 void TimeMarker::on_value_changed(double value)
 188 {
 189         if (!updating_value_widget_)
 190                 set_time(value);
 191 }
 192
 193 } // namespace view
 194 } // namespace pv