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