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