pv/view/cursorpair.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2013 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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include "cursorpair.hpp"
  21
  22 #include "ruler.hpp"
  23 #include "view.hpp"
  24 #include "pv/util.hpp"
  25
  26 #include <cassert>
  27 #include <algorithm>
  28
  29 using std::max;
  30 using std::make_pair;
  31 using std::min;
  32 using std::shared_ptr;
  33 using std::pair;
  34
  35 namespace pv {
  36 namespace views {
  37 namespace TraceView {
  38
  39 const int CursorPair::DeltaPadding = 8;
  40 const QColor CursorPair::ViewportFillColour(220, 231, 243);
  41
  42 CursorPair::CursorPair(View &view) :
  43         TimeItem(view),
  44         first_(new Cursor(view, 0.0)),
  45         second_(new Cursor(view, 1.0))
  46 {
  47 }
  48
  49 bool CursorPair::enabled() const
  50 {
  51         return view_.cursors_shown();
  52 }
  53
  54 shared_ptr<Cursor> CursorPair::first() const
  55 {
  56         return first_;
  57 }
  58
  59 shared_ptr<Cursor> CursorPair::second() const
  60 {
  61         return second_;
  62 }
  63
  64 void CursorPair::set_time(const pv::util::Timestamp& time)
  65 {
  66         const pv::util::Timestamp delta = second_->time() - first_->time();
  67         first_->set_time(time);
  68         second_->set_time(time + delta);
  69 }
  70
  71 float CursorPair::get_x() const
  72 {
  73         return (first_->get_x() + second_->get_x()) / 2.0f;
  74 }
  75
  76 QPoint CursorPair::point(const QRect &rect) const
  77 {
  78         return first_->point(rect);
  79 }
  80
  81 pv::widgets::Popup* CursorPair::create_popup(QWidget *parent)
  82 {
  83         (void)parent;
  84         return nullptr;
  85 }
  86
  87 QRectF CursorPair::label_rect(const QRectF &rect) const
  88 {
  89         const QSizeF label_size(text_size_ + LabelPadding * 2);
  90         const pair<float, float> offsets(get_cursor_offsets());
  91         const pair<float, float> normal_offsets(
  92                 (offsets.first < offsets.second) ? offsets :
  93                 make_pair(offsets.second, offsets.first));
  94
  95         const float height = label_size.height();
  96         const float left = max(normal_offsets.first + DeltaPadding, -height);
  97         const float right = min(normal_offsets.second - DeltaPadding,
  98                 (float)rect.width() + height);
  99
 100         return QRectF(left, rect.height() - label_size.height() -
 101                 TimeMarker::ArrowSize - 0.5f,
 102                 right - left, height);
 103 }
 104
 105 void CursorPair::paint_label(QPainter &p, const QRect &rect, bool hover)
 106 {
 107         assert(first_);
 108         assert(second_);
 109
 110         if (!enabled())
 111                 return;
 112
 113         const QColor text_colour =
 114                 ViewItem::select_text_colour(Cursor::FillColour);
 115
 116         p.setPen(text_colour);
 117         compute_text_size(p);
 118         QRectF delta_rect(label_rect(rect));
 119
 120         const int radius = delta_rect.height() / 2;
 121         const QRectF text_rect(delta_rect.intersected(
 122                 rect).adjusted(radius, 0, -radius, 0));
 123         if (text_rect.width() >= text_size_.width()) {
 124                 const int highlight_radius = delta_rect.height() / 2 - 2;
 125
 126                 if (selected()) {
 127                         p.setBrush(Qt::transparent);
 128                         p.setPen(highlight_pen());
 129                         p.drawRoundedRect(delta_rect, radius, radius);
 130                 }
 131
 132                 p.setBrush(hover ? Cursor::FillColour.lighter() :
 133                         Cursor::FillColour);
 134                 p.setPen(Cursor::FillColour.darker());
 135                 p.drawRoundedRect(delta_rect, radius, radius);
 136
 137                 delta_rect.adjust(1, 1, -1, -1);
 138                 p.setPen(Cursor::FillColour.lighter());
 139                 p.drawRoundedRect(delta_rect, highlight_radius, highlight_radius);
 140
 141                 p.setPen(text_colour);
 142                 p.drawText(text_rect, Qt::AlignCenter | Qt::AlignVCenter,
 143                         format_string());
 144         }
 145 }
 146
 147 void CursorPair::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 148 {
 149         if (!enabled())
 150                 return;
 151
 152         p.setPen(Qt::NoPen);
 153         p.setBrush(QBrush(ViewportFillColour));
 154
 155         const pair<float, float> offsets(get_cursor_offsets());
 156         const int l = (int)max(min(
 157                 offsets.first, offsets.second), 0.0f);
 158         const int r = (int)min(max(
 159                 offsets.first, offsets.second), (float)pp.width());
 160
 161         p.drawRect(l, pp.top(), r - l, pp.height());
 162 }
 163
 164 QString CursorPair::format_string()
 165 {
 166         const pv::util::SIPrefix prefix = view_.tick_prefix();
 167         const pv::util::Timestamp diff = abs(second_->time() - first_->time());
 168
 169         const QString s1 = Ruler::format_time_with_distance(
 170                 diff, diff, prefix, view_.time_unit(), view_.tick_precision(), false);
 171         const QString s2 = util::format_time_si(
 172                 1 / diff, pv::util::SIPrefix::unspecified, 4, "Hz", false);
 173
 174         return QString("%1 / %2").arg(s1).arg(s2);
 175 }
 176
 177 void CursorPair::compute_text_size(QPainter &p)
 178 {
 179         assert(first_);
 180         assert(second_);
 181
 182         text_size_ = p.boundingRect(QRectF(), 0, format_string()).size();
 183 }
 184
 185 pair<float, float> CursorPair::get_cursor_offsets() const
 186 {
 187         assert(first_);
 188         assert(second_);
 189
 190         return pair<float, float>(
 191                 ((first_->time() - view_.offset()) / view_.scale()).convert_to<float>(),
 192                 ((second_->time() - view_.offset()) / view_.scale()).convert_to<float>());
 193 }
 194
 195 } // namespace TraceView
 196 } // namespace views
 197 } // namespace pv