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