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         _popup(NULL),
  46         _popup_form(NULL)
  47 {
  48 }
  49
  50 QString Trace::get_name() const
  51 {
  52         return _name;
  53 }
  54
  55 void Trace::set_name(QString name)
  56 {
  57         _name = name;
  58 }
  59
  60 QColor Trace::get_colour() const
  61 {
  62         return _colour;
  63 }
  64
  65 void Trace::set_colour(QColor colour)
  66 {
  67         _colour = colour;
  68 }
  69
  70 int Trace::get_v_offset() const
  71 {
  72         return _v_offset;
  73 }
  74
  75 void Trace::set_v_offset(int v_offset)
  76 {
  77         _v_offset = v_offset;
  78 }
  79
  80 void Trace::set_view(pv::view::View *view)
  81 {
  82         assert(view);
  83         _view = view;
  84 }
  85
  86 void Trace::paint_back(QPainter &p, int left, int right)
  87 {
  88         (void)p;
  89         (void)left;
  90         (void)right;
  91 }
  92
  93 void Trace::paint_mid(QPainter &p, int left, int right)
  94 {
  95         (void)p;
  96         (void)left;
  97         (void)right;
  98 }
  99
 100 void Trace::paint_fore(QPainter &p, int left, int right)
 101 {
 102         (void)p;
 103         (void)left;
 104         (void)right;
 105 }
 106
 107 void Trace::paint_label(QPainter &p, int right, bool hover)
 108 {
 109         assert(_view);
 110         const int y = _v_offset - _view->v_offset();
 111
 112         p.setBrush(_colour);
 113
 114         if (!enabled())
 115                 return;
 116
 117         const QColor colour = get_colour();
 118
 119         compute_text_size(p);
 120         const QRectF label_rect = get_label_rect(right);
 121
 122         // Paint the label
 123         const QPointF points[] = {
 124                 label_rect.topLeft(),
 125                 label_rect.topRight(),
 126                 QPointF(right, y),
 127                 label_rect.bottomRight(),
 128                 label_rect.bottomLeft()
 129         };
 130
 131         const QPointF highlight_points[] = {
 132                 QPointF(label_rect.left() + 1, label_rect.top() + 1),
 133                 QPointF(label_rect.right(), label_rect.top() + 1),
 134                 QPointF(right - 1, y),
 135                 QPointF(label_rect.right(), label_rect.bottom() - 1),
 136                 QPointF(label_rect.left() + 1, label_rect.bottom() - 1)
 137         };
 138
 139         if (selected()) {
 140                 p.setPen(highlight_pen());
 141                 p.setBrush(Qt::transparent);
 142                 p.drawPolygon(points, countof(points));
 143         }
 144
 145         p.setPen(Qt::transparent);
 146         p.setBrush(hover ? colour.lighter() : colour);
 147         p.drawPolygon(points, countof(points));
 148
 149         p.setPen(colour.lighter());
 150         p.setBrush(Qt::transparent);
 151         p.drawPolygon(highlight_points, countof(highlight_points));
 152
 153         p.setPen(colour.darker());
 154         p.setBrush(Qt::transparent);
 155         p.drawPolygon(points, countof(points));
 156
 157         // Paint the text
 158         p.setPen(get_text_colour());
 159         p.drawText(label_rect, Qt::AlignCenter | Qt::AlignVCenter, _name);
 160 }
 161
 162 bool Trace::pt_in_label_rect(int left, int right, const QPoint &point)
 163 {
 164         (void)left;
 165
 166         const QRectF label = get_label_rect(right);
 167         return QRectF(
 168                 QPointF(label.left() - LabelHitPadding,
 169                         label.top() - LabelHitPadding),
 170                 QPointF(right, label.bottom() + LabelHitPadding)
 171                         ).contains(point);
 172 }
 173
 174 QMenu* Trace::create_context_menu(QWidget *parent)
 175 {
 176         QMenu *const menu = SelectableItem::create_context_menu(parent);
 177
 178         return menu;
 179 }
 180
 181 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 182 {
 183         using pv::widgets::Popup;
 184
 185         _popup = new Popup(parent);
 186
 187         create_popup_form();
 188
 189         connect(_popup, SIGNAL(closed()),
 190                 this, SLOT(on_popup_closed()));
 191
 192         return _popup;
 193 }
 194
 195 int Trace::get_y() const
 196 {
 197         return _v_offset - _view->v_offset();
 198 }
 199
 200 QColor Trace::get_text_colour() const
 201 {
 202         return (_colour.lightness() > 64) ? Qt::black : Qt::white;
 203 }
 204
 205 void Trace::paint_axis(QPainter &p, int y, int left, int right)
 206 {
 207         p.setPen(AxisPen);
 208         p.drawLine(QPointF(left, y + 0.5f), QPointF(right, y + 0.5f));
 209 }
 210
 211 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 212 {
 213         using pv::widgets::ColourButton;
 214
 215         ColourButton *const colour_button = new ColourButton(
 216                 TracePalette::Rows, TracePalette::Cols, parent);
 217         colour_button->set_palette(TracePalette::Colours);
 218         colour_button->set_colour(_colour);
 219         connect(colour_button, SIGNAL(selected(const QColor&)),
 220                 this, SLOT(on_colour_changed(const QColor&)));
 221
 222         form->addRow(tr("Colour"), colour_button);
 223 }
 224
 225 void Trace::create_popup_form()
 226 {
 227         // Clear the layout
 228
 229         // Transfer the layout and the child widgets to a temporary widget
 230         // which then goes out of scope destroying the layout and all the child
 231         // widgets.
 232         if (_popup_form)
 233                 QWidget().setLayout(_popup_form);
 234
 235         // Repopulate the popup
 236         _popup_form = new QFormLayout(_popup);
 237         _popup->setLayout(_popup_form);
 238         populate_popup_form(_popup, _popup_form);
 239 }
 240
 241 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 242 {
 243         QLineEdit *const name_edit = new QLineEdit(parent);
 244         name_edit->setText(_name);
 245         connect(name_edit, SIGNAL(textChanged(const QString&)),
 246                 this, SLOT(on_text_changed(const QString&)));
 247         form->addRow(tr("Name"), name_edit);
 248
 249         add_colour_option(parent, form);
 250 }
 251
 252 void Trace::compute_text_size(QPainter &p)
 253 {
 254         _text_size = QSize(
 255                 p.boundingRect(QRectF(), 0, _name).width(),
 256                 p.boundingRect(QRectF(), 0, "Tg").height());
 257 }
 258
 259 QRectF Trace::get_label_rect(int right)
 260 {
 261         using pv::view::View;
 262
 263         assert(_view);
 264
 265         const QSizeF label_size(
 266                 _text_size.width() + View::LabelPadding.width() * 2,
 267                 ceilf((_text_size.height() + View::LabelPadding.height() * 2) / 2) * 2);
 268         const float label_arrow_length = label_size.height() / 2;
 269         return QRectF(
 270                 right - label_arrow_length - label_size.width() - 0.5,
 271                 get_y() + 0.5f - label_size.height() / 2,
 272                 label_size.width(), label_size.height());
 273 }
 274
 275 void Trace::on_popup_closed()
 276 {
 277         _popup = NULL;
 278         _popup_form = NULL;
 279 }
 280
 281 void Trace::on_text_changed(const QString &text)
 282 {
 283         set_name(text);
 284         text_changed();
 285 }
 286
 287 void Trace::on_colour_changed(const QColor &colour)
 288 {
 289         set_colour(colour);
 290         colour_changed();
 291 }
 292
 293 } // namespace view
 294 } // namespace pv