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         _v_offset(0)
  34 {
  35 }
  36
  37 QString Signal::get_name() const
  38 {
  39         return _name;
  40 }
  41
  42 void Signal::set_name(QString name)
  43 {
  44         _name = name;
  45 }
  46
  47 QColor Signal::get_colour() const
  48 {
  49         return _colour;
  50 }
  51
  52 void Signal::set_colour(QColor colour)
  53 {
  54         _colour = colour;
  55 }
  56
  57 int Signal::get_v_offset() const
  58 {
  59         return _v_offset;
  60 }
  61
  62 void Signal::set_v_offset(int v_offset)
  63 {
  64         _v_offset = v_offset;
  65 }
  66
  67 void Signal::paint_label(QPainter &p, const QRect &rect, bool hover)
  68 {
  69         p.setBrush(_colour);
  70
  71         const QColor colour = get_colour();
  72         const float nominal_offset = get_nominal_offset(rect);
  73
  74         compute_text_size(p);
  75         const QRectF label_rect = get_label_rect(rect);
  76
  77         // Paint the label
  78         const QPointF points[] = {
  79                 label_rect.topLeft(),
  80                 label_rect.topRight(),
  81                 QPointF(rect.right(), nominal_offset),
  82                 label_rect.bottomRight(),
  83                 label_rect.bottomLeft()
  84         };
  85
  86         const QPointF highlight_points[] = {
  87                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
  88                 QPointF(label_rect.right(), label_rect.top() + 1),
  89                 QPointF(rect.right() - 1, nominal_offset),
  90                 QPointF(label_rect.right(), label_rect.bottom() - 1),
  91                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
  92         };
  93
  94         p.setPen(Qt::transparent);
  95         p.setBrush(hover ? colour.lighter() : colour);
  96         p.drawPolygon(points, countof(points));
  97
  98         p.setPen(colour.lighter());
  99         p.setBrush(Qt::transparent);
 100         p.drawPolygon(highlight_points, countof(highlight_points));
 101
 102         p.setPen(colour.darker());
 103         p.setBrush(Qt::transparent);
 104         p.drawPolygon(points, countof(points));
 105
 106         // Paint the text
 107         p.setPen((colour.lightness() > 64) ? Qt::black : Qt::white);
 108         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
 109 }
 110
 111 bool Signal::pt_in_label_rect(const QRect &rect, const QPoint &point)
 112 {
 113         const QRectF label = get_label_rect(rect);
 114         return QRectF(
 115                 QPointF(label.left() - LabelHitPadding,
 116                         label.top() - LabelHitPadding),
 117                 QPointF(rect.right(),
 118                         label.bottom() + LabelHitPadding)
 119                 ).contains(point);
 120 }
 121
 122 void Signal::compute_text_size(QPainter &p)
 123 {
 124         _text_size = p.boundingRect(QRectF(), 0, _name).size();
 125 }
 126
 127 QRectF Signal::get_label_rect(const QRect &rect)
 128 {
 129         using pv::view::View;
 130
 131         const float nominal_offset = get_nominal_offset(rect) + 0.5;
 132         const QSizeF label_size(
 133                 _text_size.width() + View::LabelPadding.width() * 2,
 134                 _text_size.height() + View::LabelPadding.height() * 2);
 135         const float label_arrow_length = label_size.height() / 2;
 136         return QRectF(
 137                 rect.right() - label_arrow_length -
 138                         label_size.width() - 0.5,
 139                 nominal_offset - label_size.height() / 2,
 140                 label_size.width(), label_size.height());
 141 }
 142
 143 } // namespace view
 144 } // namespace pv