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