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 <QColorDialog>
  27 #include <QInputDialog>
  28
  29 #include "trace.h"
  30 #include "view.h"
  31
  32 #include <pv/widgets/popup.h>
  33
  34 namespace pv {
  35 namespace view {
  36
  37 const QPen Trace::AxisPen(QColor(128, 128, 128, 64));
  38 const int Trace::LabelHitPadding = 2;
  39
  40 Trace::Trace(pv::SigSession &session, QString name) :
  41         _session(session),
  42         _name(name),
  43         _v_offset(0)
  44 {
  45 }
  46
  47 QString Trace::get_name() const
  48 {
  49         return _name;
  50 }
  51
  52 void Trace::set_name(QString name)
  53 {
  54         _name = name;
  55 }
  56
  57 QColor Trace::get_colour() const
  58 {
  59         return _colour;
  60 }
  61
  62 void Trace::set_colour(QColor colour)
  63 {
  64         _colour = colour;
  65 }
  66
  67 int Trace::get_v_offset() const
  68 {
  69         return _v_offset;
  70 }
  71
  72 void Trace::set_v_offset(int v_offset)
  73 {
  74         _v_offset = v_offset;
  75 }
  76
  77 void Trace::set_view(pv::view::View *view)
  78 {
  79         assert(view);
  80         _view = view;
  81 }
  82
  83 void Trace::paint_back(QPainter &p, int left, int right)
  84 {
  85         (void)p;
  86         (void)left;
  87         (void)right;
  88 }
  89
  90 void Trace::paint_mid(QPainter &p, int left, int right)
  91 {
  92         (void)p;
  93         (void)left;
  94         (void)right;
  95 }
  96
  97 void Trace::paint_fore(QPainter &p, int left, int right)
  98 {
  99         (void)p;
 100         (void)left;
 101         (void)right;
 102 }
 103
 104 void Trace::paint_label(QPainter &p, int right, bool hover)
 105 {
 106         assert(_view);
 107         const int y = _v_offset - _view->v_offset();
 108
 109         p.setBrush(_colour);
 110
 111         if (!enabled())
 112                 return;
 113
 114         const QColor colour = get_colour();
 115
 116         compute_text_size(p);
 117         const QRectF label_rect = get_label_rect(right);
 118
 119         // Paint the label
 120         const QPointF points[] = {
 121                 label_rect.topLeft(),
 122                 label_rect.topRight(),
 123                 QPointF(right, y),
 124                 label_rect.bottomRight(),
 125                 label_rect.bottomLeft()
 126         };
 127
 128         const QPointF highlight_points[] = {
 129                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
 130                 QPointF(label_rect.right(), label_rect.top() + 1),
 131                 QPointF(right - 1, y),
 132                 QPointF(label_rect.right(), label_rect.bottom() - 1),
 133                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
 134         };
 135
 136         if (selected()) {
 137                 p.setPen(highlight_pen());
 138                 p.setBrush(Qt::transparent);
 139                 p.drawPolygon(points, countof(points));
 140         }
 141
 142         p.setPen(Qt::transparent);
 143         p.setBrush(hover ? colour.lighter() : colour);
 144         p.drawPolygon(points, countof(points));
 145
 146         p.setPen(colour.lighter());
 147         p.setBrush(Qt::transparent);
 148         p.drawPolygon(highlight_points, countof(highlight_points));
 149
 150         p.setPen(colour.darker());
 151         p.setBrush(Qt::transparent);
 152         p.drawPolygon(points, countof(points));
 153
 154         // Paint the text
 155         p.setPen(get_text_colour());
 156         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
 157 }
 158
 159 bool Trace::pt_in_label_rect(int left, int right, const QPoint &point)
 160 {
 161         (void)left;
 162
 163         const QRectF label = get_label_rect(right);
 164         return QRectF(
 165                 QPointF(label.left() - LabelHitPadding,
 166                         label.top() - LabelHitPadding),
 167                 QPointF(right, label.bottom() + LabelHitPadding)
 168                         ).contains(point);
 169 }
 170
 171 QMenu* Trace::create_context_menu(QWidget *parent)
 172 {
 173         QMenu *const menu = SelectableItem::create_context_menu(parent);
 174
 175         QAction *const set_name = new QAction(tr("Set &Name..."), this);
 176         connect(set_name, SIGNAL(triggered()),
 177                 this, SLOT(on_action_set_name_triggered()));
 178         menu->addAction(set_name);
 179
 180         QAction *const set_colour = new QAction(tr("Set &Colour..."), this);
 181         connect(set_colour, SIGNAL(triggered()),
 182                 this, SLOT(on_action_set_colour_triggered()));
 183         menu->addAction(set_colour);
 184
 185         return menu;
 186 }
 187
 188 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 189 {
 190         using pv::widgets::Popup;
 191         Popup *const popup = new Popup(parent);
 192         QFormLayout *const form = new QFormLayout(popup);
 193         popup->setLayout(form);
 194         populate_popup_form(popup, form);
 195         return popup;
 196 }
 197
 198 int Trace::get_y() const
 199 {
 200         return _v_offset - _view->v_offset();
 201 }
 202
 203 QColor Trace::get_text_colour() const
 204 {
 205         return (_colour.lightness() > 64) ? Qt::black : Qt::white;
 206 }
 207
 208 void Trace::paint_axis(QPainter &p, int y, int left, int right)
 209 {
 210         p.setPen(AxisPen);
 211         p.drawLine(QPointF(left, y + 0.5f), QPointF(right, y + 0.5f));
 212 }
 213
 214 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 215 {
 216         form->addRow("Name", new QLineEdit(parent));
 217 }
 218
 219 void Trace::compute_text_size(QPainter &p)
 220 {
 221         _text_size = QSize(
 222                 p.boundingRect(QRectF(), 0, _name).width(),
 223                 p.boundingRect(QRectF(), 0, "Tg").height());
 224 }
 225
 226 QRectF Trace::get_label_rect(int right)
 227 {
 228         using pv::view::View;
 229
 230         assert(_view);
 231
 232         const QSizeF label_size(
 233                 _text_size.width() + View::LabelPadding.width() * 2,
 234                 ceilf((_text_size.height() + View::LabelPadding.height() * 2) / 2) * 2);
 235         const float label_arrow_length = label_size.height() / 2;
 236         return QRectF(
 237                 right - label_arrow_length - label_size.width() - 0.5,
 238                 get_y() + 0.5f - label_size.height() / 2,
 239                 label_size.width(), label_size.height());
 240 }
 241
 242 void Trace::on_action_set_name_triggered()
 243 {
 244         bool ok = false;
 245
 246         const QString new_label = QInputDialog::getText(_context_parent,
 247                 tr("Set Name"), tr("Name"), QLineEdit::Normal, get_name(),
 248                 &ok);
 249
 250         if (ok)
 251                 set_name(new_label);
 252 }
 253
 254 void Trace::on_action_set_colour_triggered()
 255 {
 256         const QColor new_colour = QColorDialog::getColor(
 257                 get_colour(), _context_parent, tr("Set Colour"));
 258
 259         if (new_colour.isValid())
 260                 set_colour(new_colour);
 261 }
 262
 263
 264 } // namespace view
 265 } // namespace pv