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 <math.h>
  24
  25 #include <QApplication>
  26
  27 #include "signal.h"
  28 #include "view.h"
  29
  30 namespace pv {
  31 namespace view {
  32
  33 const int Signal::LabelHitPadding = 2;
  34 const int Signal::LabelHighlightRadius = 6;
  35
  36 const QPen Signal::SignalAxisPen(QColor(128, 128, 128, 64));
  37
  38 Signal::Signal(QString name) :
  39         _name(name),
  40         _v_offset(0),
  41         _selected(false)
  42 {
  43 }
  44
  45 QString Signal::get_name() const
  46 {
  47         return _name;
  48 }
  49
  50 void Signal::set_name(QString name)
  51 {
  52         _name = name;
  53 }
  54
  55 QColor Signal::get_colour() const
  56 {
  57         return _colour;
  58 }
  59
  60 void Signal::set_colour(QColor colour)
  61 {
  62         _colour = colour;
  63 }
  64
  65 int Signal::get_v_offset() const
  66 {
  67         return _v_offset;
  68 }
  69
  70 void Signal::set_v_offset(int v_offset)
  71 {
  72         _v_offset = v_offset;
  73 }
  74
  75 bool Signal::selected() const
  76 {
  77         return _selected;
  78 }
  79
  80 void Signal::select(bool select)
  81 {
  82         _selected = select;
  83 }
  84
  85 void Signal::paint_label(QPainter &p, int y, int right, bool hover)
  86 {
  87         p.setBrush(_colour);
  88
  89         const QColor colour = get_colour();
  90
  91         compute_text_size(p);
  92         const QRectF label_rect = get_label_rect(y, right);
  93
  94         // Paint the label
  95         const QPointF points[] = {
  96                 label_rect.topLeft(),
  97                 label_rect.topRight(),
  98                 QPointF(right, y),
  99                 label_rect.bottomRight(),
 100                 label_rect.bottomLeft()
 101         };
 102
 103         const QPointF highlight_points[] = {
 104                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
 105                 QPointF(label_rect.right(), label_rect.top() + 1),
 106                 QPointF(right - 1, y),
 107                 QPointF(label_rect.right(), label_rect.bottom() - 1),
 108                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
 109         };
 110
 111         if (_selected) {
 112                 p.setPen(QPen(QApplication::palette().brush(
 113                         QPalette::Highlight), LabelHighlightRadius,
 114                         Qt::SolidLine, Qt::RoundCap, Qt::RoundJoin));
 115                 p.setBrush(Qt::transparent);
 116                 p.drawPolygon(points, countof(points));
 117         }
 118
 119         p.setPen(Qt::transparent);
 120         p.setBrush(hover ? colour.lighter() : colour);
 121         p.drawPolygon(points, countof(points));
 122
 123         p.setPen(colour.lighter());
 124         p.setBrush(Qt::transparent);
 125         p.drawPolygon(highlight_points, countof(highlight_points));
 126
 127         p.setPen(colour.darker());
 128         p.setBrush(Qt::transparent);
 129         p.drawPolygon(points, countof(points));
 130
 131         // Paint the text
 132         p.setPen((colour.lightness() > 64) ? Qt::black : Qt::white);
 133         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
 134 }
 135
 136 bool Signal::pt_in_label_rect(int y, int left, int right,
 137         const QPoint &point)
 138 {
 139         (void)left;
 140
 141         const QRectF label = get_label_rect(y, right);
 142         return QRectF(
 143                 QPointF(label.left() - LabelHitPadding,
 144                         label.top() - LabelHitPadding),
 145                 QPointF(right, label.bottom() + LabelHitPadding)
 146                         ).contains(point);
 147 }
 148
 149 void Signal::paint_axis(QPainter &p, int y, int left, int right)
 150 {
 151         p.setPen(SignalAxisPen);
 152         p.drawLine(QPointF(left, y + 0.5f), QPointF(right, y + 0.5f));
 153 }
 154
 155 void Signal::compute_text_size(QPainter &p)
 156 {
 157         _text_size = QSize(
 158                 p.boundingRect(QRectF(), 0, _name).width(),
 159                 p.boundingRect(QRectF(), 0, "Tg").height());
 160 }
 161
 162 QRectF Signal::get_label_rect(int y, int right)
 163 {
 164         using pv::view::View;
 165
 166         const QSizeF label_size(
 167                 _text_size.width() + View::LabelPadding.width() * 2,
 168                 ceilf((_text_size.height() + View::LabelPadding.height() * 2) / 2) * 2);
 169         const float label_arrow_length = label_size.height() / 2;
 170         return QRectF(
 171                 right - label_arrow_length - label_size.width() - 0.5,
 172                 y + 0.5f - label_size.height() / 2,
 173                 label_size.width(), label_size.height());
 174 }
 175
 176 } // namespace view
 177 } // namespace pv