pv/view/signal.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 <extdef.h>
  22
  23 #include <assert.h>
  24 #include <math.h>
  25
  26 #include <QApplication>
  27
  28 #include "signal.h"
  29 #include "view.h"
  30
  31 namespace pv {
  32 namespace view {
  33
  34 const int Signal::LabelHitPadding = 2;
  35
  36 const QPen Signal::SignalAxisPen(QColor(128, 128, 128, 64));
  37
  38 Signal::Signal(const sr_probe *const probe) :
  39         _probe(probe),
  40         _name(probe->name),
  41         _v_offset(0)
  42 {
  43         assert(_probe);
  44 }
  45
  46 QString Signal::get_name() const
  47 {
  48         return _name;
  49 }
  50
  51 void Signal::set_name(QString name)
  52 {
  53         _name = name;
  54 }
  55
  56 QColor Signal::get_colour() const
  57 {
  58         return _colour;
  59 }
  60
  61 void Signal::set_colour(QColor colour)
  62 {
  63         _colour = colour;
  64 }
  65
  66 int Signal::get_v_offset() const
  67 {
  68         return _v_offset;
  69 }
  70
  71 void Signal::set_v_offset(int v_offset)
  72 {
  73         _v_offset = v_offset;
  74 }
  75
  76 void Signal::paint_label(QPainter &p, int y, int right, bool hover)
  77 {
  78         p.setBrush(_colour);
  79
  80         if (!_probe->enabled)
  81                 return;
  82
  83         const QColor colour = get_colour();
  84
  85         compute_text_size(p);
  86         const QRectF label_rect = get_label_rect(y, right);
  87
  88         // Paint the label
  89         const QPointF points[] = {
  90                 label_rect.topLeft(),
  91                 label_rect.topRight(),
  92                 QPointF(right, y),
  93                 label_rect.bottomRight(),
  94                 label_rect.bottomLeft()
  95         };
  96
  97         const QPointF highlight_points[] = {
  98                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
  99                 QPointF(label_rect.right(), label_rect.top() + 1),
 100                 QPointF(right - 1, y),
 101                 QPointF(label_rect.right(), label_rect.bottom() - 1),
 102                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
 103         };
 104
 105         if (selected()) {
 106                 p.setPen(highlight_pen());
 107                 p.setBrush(Qt::transparent);
 108                 p.drawPolygon(points, countof(points));
 109         }
 110
 111         p.setPen(Qt::transparent);
 112         p.setBrush(hover ? colour.lighter() : colour);
 113         p.drawPolygon(points, countof(points));
 114
 115         p.setPen(colour.lighter());
 116         p.setBrush(Qt::transparent);
 117         p.drawPolygon(highlight_points, countof(highlight_points));
 118
 119         p.setPen(colour.darker());
 120         p.setBrush(Qt::transparent);
 121         p.drawPolygon(points, countof(points));
 122
 123         // Paint the text
 124         p.setPen((colour.lightness() > 64) ? Qt::black : Qt::white);
 125         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
 126 }
 127
 128 bool Signal::pt_in_label_rect(int y, int left, int right,
 129         const QPoint &point)
 130 {
 131         (void)left;
 132
 133         const QRectF label = get_label_rect(y, right);
 134         return QRectF(
 135                 QPointF(label.left() - LabelHitPadding,
 136                         label.top() - LabelHitPadding),
 137                 QPointF(right, label.bottom() + LabelHitPadding)
 138                         ).contains(point);
 139 }
 140
 141 void Signal::paint_axis(QPainter &p, int y, int left, int right)
 142 {
 143         p.setPen(SignalAxisPen);
 144         p.drawLine(QPointF(left, y + 0.5f), QPointF(right, y + 0.5f));
 145 }
 146
 147 void Signal::compute_text_size(QPainter &p)
 148 {
 149         _text_size = QSize(
 150                 p.boundingRect(QRectF(), 0, _name).width(),
 151                 p.boundingRect(QRectF(), 0, "Tg").height());
 152 }
 153
 154 QRectF Signal::get_label_rect(int y, int right)
 155 {
 156         using pv::view::View;
 157
 158         const QSizeF label_size(
 159                 _text_size.width() + View::LabelPadding.width() * 2,
 160                 ceilf((_text_size.height() + View::LabelPadding.height() * 2) / 2) * 2);
 161         const float label_arrow_length = label_size.height() / 2;
 162         return QRectF(
 163                 right - label_arrow_length - label_size.width() - 0.5,
 164                 y + 0.5f - label_size.height() / 2,
 165                 label_size.width(), label_size.height());
 166 }
 167
 168 } // namespace view
 169 } // namespace pv