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