pv/view/trace.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2013 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 "trace.h"
  27 #include "view.h"
  28
  29 namespace pv {
  30 namespace view {
  31
  32 const int Trace::LabelHitPadding = 2;
  33
  34 Trace::Trace(pv::SigSession &session, QString name) :
  35         _session(session),
  36         _name(name),
  37         _v_offset(0)
  38 {
  39 }
  40
  41 QString Trace::get_name() const
  42 {
  43         return _name;
  44 }
  45
  46 void Trace::set_name(QString name)
  47 {
  48         _name = name;
  49 }
  50
  51 QColor Trace::get_colour() const
  52 {
  53         return _colour;
  54 }
  55
  56 void Trace::set_colour(QColor colour)
  57 {
  58         _colour = colour;
  59 }
  60
  61 int Trace::get_v_offset() const
  62 {
  63         return _v_offset;
  64 }
  65
  66 void Trace::set_v_offset(int v_offset)
  67 {
  68         _v_offset = v_offset;
  69 }
  70
  71 void Trace::paint_label(QPainter &p, int y, int right, bool hover)
  72 {
  73         p.setBrush(_colour);
  74
  75         if (!enabled())
  76                 return;
  77
  78         const QColor colour = get_colour();
  79
  80         compute_text_size(p);
  81         const QRectF label_rect = get_label_rect(y, right);
  82
  83         // Paint the label
  84         const QPointF points[] = {
  85                 label_rect.topLeft(),
  86                 label_rect.topRight(),
  87                 QPointF(right, y),
  88                 label_rect.bottomRight(),
  89                 label_rect.bottomLeft()
  90         };
  91
  92         const QPointF highlight_points[] = {
  93                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
  94                 QPointF(label_rect.right(), label_rect.top() + 1),
  95                 QPointF(right - 1, y),
  96                 QPointF(label_rect.right(), label_rect.bottom() - 1),
  97                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
  98         };
  99
 100         if (selected()) {
 101                 p.setPen(highlight_pen());
 102                 p.setBrush(Qt::transparent);
 103                 p.drawPolygon(points, countof(points));
 104         }
 105
 106         p.setPen(Qt::transparent);
 107         p.setBrush(hover ? colour.lighter() : colour);
 108         p.drawPolygon(points, countof(points));
 109
 110         p.setPen(colour.lighter());
 111         p.setBrush(Qt::transparent);
 112         p.drawPolygon(highlight_points, countof(highlight_points));
 113
 114         p.setPen(colour.darker());
 115         p.setBrush(Qt::transparent);
 116         p.drawPolygon(points, countof(points));
 117
 118         // Paint the text
 119         p.setPen((colour.lightness() > 64) ? Qt::black : Qt::white);
 120         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
 121 }
 122
 123 bool Trace::pt_in_label_rect(int y, int left, int right,
 124         const QPoint &point)
 125 {
 126         (void)left;
 127
 128         const QRectF label = get_label_rect(y, right);
 129         return QRectF(
 130                 QPointF(label.left() - LabelHitPadding,
 131                         label.top() - LabelHitPadding),
 132                 QPointF(right, label.bottom() + LabelHitPadding)
 133                         ).contains(point);
 134 }
 135
 136 void Trace::compute_text_size(QPainter &p)
 137 {
 138         _text_size = QSize(
 139                 p.boundingRect(QRectF(), 0, _name).width(),
 140                 p.boundingRect(QRectF(), 0, "Tg").height());
 141 }
 142
 143 QRectF Trace::get_label_rect(int y, int right)
 144 {
 145         using pv::view::View;
 146
 147         const QSizeF label_size(
 148                 _text_size.width() + View::LabelPadding.width() * 2,
 149                 ceilf((_text_size.height() + View::LabelPadding.height() * 2) / 2) * 2);
 150         const float label_arrow_length = label_size.height() / 2;
 151         return QRectF(
 152                 right - label_arrow_length - label_size.width() - 0.5,
 153                 y + 0.5f - label_size.height() / 2,
 154                 label_size.width(), label_size.height());
 155 }
 156
 157 } // namespace view
 158 } // namespace pv