pv/view/cursor.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 "cursor.h"
  22
  23 #include "ruler.h"
  24 #include "view.h"
  25
  26 #include <QBrush>
  27 #include <QPainter>
  28 #include <QPointF>
  29 #include <QRect>
  30 #include <QRectF>
  31
  32 #include <stdio.h>
  33
  34 #include <extdef.h>
  35
  36 namespace pv {
  37 namespace view {
  38
  39 const QColor Cursor::LineColour(32, 74, 135);
  40 const QColor Cursor::FillColour(52, 101, 164);
  41 const QColor Cursor::HighlightColour(83, 130, 186);
  42 const QColor Cursor::TextColour(Qt::white);
  43
  44 const int Cursor::Offset = 1;
  45
  46 const int Cursor::ArrowSize = 4;
  47
  48 Cursor::Cursor(const View &view, double time, Cursor &other) :
  49         TimeMarker(view, LineColour, time),
  50         _other(other)
  51 {
  52 }
  53
  54 QRectF Cursor::get_label_rect(const QRect &rect) const
  55 {
  56         const float x = (_time - _view.offset()) / _view.scale();
  57
  58         const QSizeF label_size(
  59                 _text_size.width() + View::LabelPadding.width() * 2,
  60                 _text_size.height() + View::LabelPadding.height() * 2);
  61         const float top = rect.height() - label_size.height() -
  62                 Cursor::Offset - Cursor::ArrowSize - 0.5f;
  63         const float height = label_size.height() + 1;
  64
  65         if (_time > _other.time())
  66                 return QRectF(x, top, label_size.width(), height);
  67         else
  68                 return QRectF(x - label_size.width(), top,
  69                         label_size.width(), height);
  70 }
  71
  72 void Cursor::paint_label(QPainter &p, const QRect &rect,
  73         unsigned int prefix)
  74 {
  75         compute_text_size(p, prefix);
  76         const QRectF r(get_label_rect(rect));
  77
  78         if (_time > _other.time())
  79         {
  80                 const QPointF points[] = {
  81                         r.topLeft(),
  82                         r.topRight(),
  83                         r.bottomRight(),
  84                         QPointF(r.left() + ArrowSize, r.bottom()),
  85                         QPointF(r.left(), rect.bottom()),
  86                 };
  87
  88                 const QPointF highlight_points[] = {
  89                         QPointF(r.left() + 1, r.top() + 1),
  90                         QPointF(r.right() - 1, r.top() + 1),
  91                         QPointF(r.right() - 1, r.bottom() - 1),
  92                         QPointF(r.left() + ArrowSize - 1, r.bottom() - 1),
  93                         QPointF(r.left() + 1, rect.bottom() - 1),
  94                 };
  95
  96                 p.setPen(Qt::transparent);
  97                 p.setBrush(FillColour);
  98                 p.drawPolygon(points, countof(points));
  99
 100                 p.setPen(HighlightColour);
 101                 p.setBrush(Qt::transparent);
 102                 p.drawPolygon(highlight_points, countof(highlight_points));
 103
 104                 p.setPen(LineColour);
 105                 p.setBrush(Qt::transparent);
 106                 p.drawPolygon(points, countof(points));
 107         }
 108         else
 109         {
 110                 const QPointF points[] = {
 111                         r.topRight(),
 112                         r.topLeft(),
 113                         r.bottomLeft(),
 114                         QPointF(r.right() - ArrowSize, r.bottom()),
 115                         QPointF(r.right(), rect.bottom()),
 116                 };
 117
 118                 const QPointF highlight_points[] = {
 119                         QPointF(r.right() - 1, r.top() + 1),
 120                         QPointF(r.left() + 1, r.top() + 1),
 121                         QPointF(r.left() + 1, r.bottom() - 1),
 122                         QPointF(r.right() - ArrowSize + 1, r.bottom() - 1),
 123                         QPointF(r.right() - 1, rect.bottom() - 1),
 124                 };
 125
 126                 p.setPen(Qt::transparent);
 127                 p.setBrush(FillColour);
 128                 p.drawPolygon(points, countof(points));
 129
 130                 p.setPen(HighlightColour);
 131                 p.setBrush(Qt::transparent);
 132                 p.drawPolygon(highlight_points, countof(highlight_points));
 133
 134                 p.setPen(LineColour);
 135                 p.setBrush(Qt::transparent);
 136                 p.drawPolygon(points, countof(points));
 137         }
 138
 139         p.setPen(TextColour);
 140         p.drawText(r, Qt::AlignCenter | Qt::AlignVCenter,
 141                 Ruler::format_time(_time, prefix, 2));
 142 }
 143
 144 void Cursor::compute_text_size(QPainter &p, unsigned int prefix)
 145 {
 146         _text_size = p.boundingRect(QRectF(), 0,
 147                 Ruler::format_time(_time, prefix, 2)).size();
 148 }
 149
 150 } // namespace view
 151 } // namespace pv