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 void Signal::paint_label(QPainter &p, const QRect &rect, bool hover)
  46 {
  47         p.setBrush(get_colour());
  48
  49         const QColor colour = get_colour();
  50         const float nominal_offset = get_nominal_offset(rect);
  51
  52         compute_text_size(p);
  53         const QRectF label_rect = get_label_rect(rect);
  54
  55         // Paint the label
  56         const QPointF points[] = {
  57                 label_rect.topLeft(),
  58                 label_rect.topRight(),
  59                 QPointF(rect.right(), nominal_offset),
  60                 label_rect.bottomRight(),
  61                 label_rect.bottomLeft()
  62         };
  63
  64         const QPointF highlight_points[] = {
  65                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
  66                 QPointF(label_rect.right(), label_rect.top() + 1),
  67                 QPointF(rect.right() - 1, nominal_offset),
  68                 QPointF(label_rect.right(), label_rect.bottom() - 1),
  69                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
  70         };
  71
  72         p.setPen(Qt::transparent);
  73         p.setBrush(hover ? colour.lighter() : colour);
  74         p.drawPolygon(points, countof(points));
  75
  76         p.setPen(colour.lighter());
  77         p.setBrush(Qt::transparent);
  78         p.drawPolygon(highlight_points, countof(highlight_points));
  79
  80         p.setPen(colour.darker());
  81         p.setBrush(Qt::transparent);
  82         p.drawPolygon(points, countof(points));
  83
  84         // Paint the text
  85         p.setPen((colour.lightness() > 64) ? Qt::black : Qt::white);
  86         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
  87 }
  88
  89 bool Signal::pt_in_label_rect(const QRect &rect, const QPoint &point)
  90 {
  91         const QRectF label = get_label_rect(rect);
  92         return QRectF(
  93                 QPointF(label.left() - LabelHitPadding,
  94                         label.top() - LabelHitPadding),
  95                 QPointF(rect.right(),
  96                         label.bottom() + LabelHitPadding)
  97                 ).contains(point);
  98 }
  99
 100 void Signal::compute_text_size(QPainter &p)
 101 {
 102         _text_size = p.boundingRect(QRectF(), 0, _name).size();
 103 }
 104
 105 QRectF Signal::get_label_rect(const QRect &rect)
 106 {
 107         using pv::view::View;
 108
 109         const float nominal_offset = get_nominal_offset(rect);
 110         const QSizeF label_size(
 111                 _text_size.width() + View::LabelPadding.width() * 2,
 112                 _text_size.height() + View::LabelPadding.height() * 2);
 113         const float label_arrow_length = label_size.height() / 2;
 114         return QRectF(
 115                 rect.right() - label_arrow_length - label_size.width(),
 116                 nominal_offset - label_size.height() / 2,
 117                 label_size.width(), label_size.height());
 118 }
 119
 120 } // namespace pv