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