pv/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 "signal.h"
  24 #include "view/view.h"
  25
  26 namespace pv {
  27
  28 const int Signal::LabelHitPadding = 2;
  29
  30 Signal::Signal(QString name) :
  31         _name(name)
  32 {
  33 }
  34
  35 QString Signal::get_name() const
  36 {
  37         return _name;
  38 }
  39
  40 void Signal::set_name(QString name)
  41 {
  42         _name = name;
  43 }
  44
  45 QColor Signal::get_colour() const
  46 {
  47         return _colour;
  48 }
  49
  50 void Signal::set_colour(QColor colour)
  51 {
  52         _colour = colour;
  53 }
  54
  55 void Signal::paint_label(QPainter &p, const QRect &rect, bool hover)
  56 {
  57         p.setBrush(_colour);
  58
  59         const QColor colour = get_colour();
  60         const float nominal_offset = get_nominal_offset(rect);
  61
  62         compute_text_size(p);
  63         const QRectF label_rect = get_label_rect(rect);
  64
  65         // Paint the label
  66         const QPointF points[] = {
  67                 label_rect.topLeft(),
  68                 label_rect.topRight(),
  69                 QPointF(rect.right(), nominal_offset),
  70                 label_rect.bottomRight(),
  71                 label_rect.bottomLeft()
  72         };
  73
  74         const QPointF highlight_points[] = {
  75                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
  76                 QPointF(label_rect.right(), label_rect.top() + 1),
  77                 QPointF(rect.right() - 1, nominal_offset),
  78                 QPointF(label_rect.right(), label_rect.bottom() - 1),
  79                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
  80         };
  81
  82         p.setPen(Qt::transparent);
  83         p.setBrush(hover ? colour.lighter() : colour);
  84         p.drawPolygon(points, countof(points));
  85
  86         p.setPen(colour.lighter());
  87         p.setBrush(Qt::transparent);
  88         p.drawPolygon(highlight_points, countof(highlight_points));
  89
  90         p.setPen(colour.darker());
  91         p.setBrush(Qt::transparent);
  92         p.drawPolygon(points, countof(points));
  93
  94         // Paint the text
  95         p.setPen((colour.lightness() > 64) ? Qt::black : Qt::white);
  96         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
  97 }
  98
  99 bool Signal::pt_in_label_rect(const QRect &rect, const QPoint &point)
 100 {
 101         const QRectF label = get_label_rect(rect);
 102         return QRectF(
 103                 QPointF(label.left() - LabelHitPadding,
 104                         label.top() - LabelHitPadding),
 105                 QPointF(rect.right(),
 106                         label.bottom() + LabelHitPadding)
 107                 ).contains(point);
 108 }
 109
 110 void Signal::compute_text_size(QPainter &p)
 111 {
 112         _text_size = p.boundingRect(QRectF(), 0, _name).size();
 113 }
 114
 115 QRectF Signal::get_label_rect(const QRect &rect)
 116 {
 117         using pv::view::View;
 118
 119         const float nominal_offset = get_nominal_offset(rect) + 0.5;
 120         const QSizeF label_size(
 121                 _text_size.width() + View::LabelPadding.width() * 2,
 122                 _text_size.height() + View::LabelPadding.height() * 2);
 123         const float label_arrow_length = label_size.height() / 2;
 124         return QRectF(
 125                 rect.right() - label_arrow_length -
 126                         label_size.width() - 0.5,
 127                 nominal_offset - label_size.height() / 2,
 128                 label_size.width(), label_size.height());
 129 }
 130
 131 } // namespace pv