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