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