pv/views/trace/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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <extdef.h>
  21
  22 #include <cassert>
  23 #include <cmath>
  24
  25 #include <QApplication>
  26 #include <QFormLayout>
  27 #include <QKeyEvent>
  28 #include <QLineEdit>
  29
  30 #include "trace.hpp"
  31 #include "tracepalette.hpp"
  32 #include "view.hpp"
  33
  34 #include "pv/globalsettings.hpp"
  35 #include "pv/widgets/colourbutton.hpp"
  36 #include "pv/widgets/popup.hpp"
  37
  38 using std::pair;
  39 using std::shared_ptr;
  40
  41 namespace pv {
  42 namespace views {
  43 namespace trace {
  44
  45 const QPen Trace::AxisPen(QColor(0, 0, 0, 30 * 256 / 100));
  46 const int Trace::LabelHitPadding = 2;
  47
  48 const QColor Trace::BrightGrayBGColour = QColor(0, 0, 0, 10 * 255 / 100);
  49 const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15 * 255 / 100);
  50
  51 Trace::Trace(shared_ptr<data::SignalBase> channel) :
  52         base_(channel),
  53         axis_pen_(AxisPen),
  54         segment_display_mode_(ShowLastSegmentOnly),  // Will be overwritten by View
  55         popup_(nullptr),
  56         popup_form_(nullptr)
  57 {
  58         connect(channel.get(), SIGNAL(name_changed(const QString&)),
  59                 this, SLOT(on_name_changed(const QString&)));
  60         connect(channel.get(), SIGNAL(colour_changed(const QColor&)),
  61                 this, SLOT(on_colour_changed(const QColor&)));
  62 }
  63
  64 shared_ptr<data::SignalBase> Trace::base() const
  65 {
  66         return base_;
  67 }
  68
  69 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  70 {
  71         const int y = get_visual_y();
  72
  73         p.setBrush(base_->colour());
  74
  75         if (!enabled())
  76                 return;
  77
  78         const QRectF r = label_rect(rect);
  79
  80         // When selected, move the arrow to the left so that the border can show
  81         const QPointF offs = (selected()) ? QPointF(-2, 0) : QPointF(0, 0);
  82
  83         // Paint the label
  84         const float label_arrow_length = r.height() / 2;
  85         QPointF points[] = {
  86                 offs + r.topLeft(),
  87                 offs + QPointF(r.right() - label_arrow_length, r.top()),
  88                 offs + QPointF(r.right(), y),
  89                 offs + QPointF(r.right() - label_arrow_length, r.bottom()),
  90                 offs + r.bottomLeft()
  91         };
  92         QPointF highlight_points[] = {
  93                 offs + QPointF(r.left() + 1, r.top() + 1),
  94                 offs + QPointF(r.right() - label_arrow_length, r.top() + 1),
  95                 offs + QPointF(r.right() - 1, y),
  96                 offs + QPointF(r.right() - label_arrow_length, r.bottom() - 1),
  97                 offs + QPointF(r.left() + 1, r.bottom() - 1)
  98         };
  99
 100         if (selected()) {
 101                 p.setPen(highlight_pen());
 102                 p.setBrush(Qt::transparent);
 103                 p.drawPolygon(points, countof(points));
 104         }
 105
 106         p.setPen(Qt::transparent);
 107         p.setBrush(hover ? base_->colour().lighter() : base_->colour());
 108         p.drawPolygon(points, countof(points));
 109
 110         p.setPen(base_->colour().lighter());
 111         p.setBrush(Qt::transparent);
 112         p.drawPolygon(highlight_points, countof(highlight_points));
 113
 114         p.setPen(base_->colour().darker());
 115         p.setBrush(Qt::transparent);
 116         p.drawPolygon(points, countof(points));
 117
 118         // Paint the text
 119         p.setPen(select_text_colour(base_->colour()));
 120         p.setFont(QApplication::font());
 121         p.drawText(QRectF(r.x(), r.y(),
 122                 r.width() - label_arrow_length, r.height()),
 123                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
 124 }
 125
 126 QMenu* Trace::create_context_menu(QWidget *parent)
 127 {
 128         QMenu *const menu = ViewItem::create_context_menu(parent);
 129
 130         return menu;
 131 }
 132
 133 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 134 {
 135         using pv::widgets::Popup;
 136
 137         popup_ = new Popup(parent);
 138         popup_->set_position(parent->mapToGlobal(
 139                 drag_point(parent->rect())), Popup::Right);
 140
 141         create_popup_form();
 142
 143         connect(popup_, SIGNAL(closed()), this, SLOT(on_popup_closed()));
 144
 145         return popup_;
 146 }
 147
 148 QRectF Trace::label_rect(const QRectF &rect) const
 149 {
 150         QFontMetrics m(QApplication::font());
 151         const QSize text_size(
 152                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
 153         const QSizeF label_size(
 154                 text_size.width() + LabelPadding.width() * 2,
 155                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 156         const float half_height = label_size.height() / 2;
 157         return QRectF(
 158                 rect.right() - half_height - label_size.width() - 0.5,
 159                 get_visual_y() + 0.5f - half_height,
 160                 label_size.width() + half_height,
 161                 label_size.height());
 162 }
 163
 164 void Trace::paint_back(QPainter &p, ViewItemPaintParams &pp)
 165 {
 166         const View *view = owner_->view();
 167         assert(view);
 168
 169         if (view->coloured_bg())
 170                 p.setBrush(base_->bgcolour());
 171         else
 172                 p.setBrush(pp.next_bg_colour_state() ? BrightGrayBGColour : DarkGrayBGColour);
 173
 174         p.setPen(QPen(Qt::NoPen));
 175
 176         const pair<int, int> extents = v_extents();
 177         p.drawRect(pp.left(), get_visual_y() + extents.first,
 178                 pp.width(), extents.second - extents.first);
 179 }
 180
 181 void Trace::paint_axis(QPainter &p, ViewItemPaintParams &pp, int y)
 182 {
 183         p.setRenderHint(QPainter::Antialiasing, false);
 184
 185         p.setPen(axis_pen_);
 186         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 187
 188         p.setRenderHint(QPainter::Antialiasing, true);
 189 }
 190
 191 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 192 {
 193         using pv::widgets::ColourButton;
 194
 195         ColourButton *const colour_button = new ColourButton(
 196                 TracePalette::Rows, TracePalette::Cols, parent);
 197         colour_button->set_palette(TracePalette::Colours);
 198         colour_button->set_colour(base_->colour());
 199         connect(colour_button, SIGNAL(selected(const QColor&)),
 200                 this, SLOT(on_colouredit_changed(const QColor&)));
 201
 202         form->addRow(tr("Colour"), colour_button);
 203 }
 204
 205 void Trace::create_popup_form()
 206 {
 207         // Clear the layout
 208
 209         // Transfer the layout and the child widgets to a temporary widget
 210         // which we delete after the event was handled. This way, the layout
 211         // and all widgets contained therein are deleted after the event was
 212         // handled, leaving the parent popup_ time to handle the change.
 213         if (popup_form_) {
 214                 QWidget *suicidal = new QWidget();
 215                 suicidal->setLayout(popup_form_);
 216                 suicidal->deleteLater();
 217         }
 218
 219         // Repopulate the popup
 220         popup_form_ = new QFormLayout(popup_);
 221         popup_->setLayout(popup_form_);
 222         populate_popup_form(popup_, popup_form_);
 223 }
 224
 225 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 226 {
 227         QLineEdit *const name_edit = new QLineEdit(parent);
 228         name_edit->setText(base_->name());
 229         connect(name_edit, SIGNAL(textChanged(const QString&)),
 230                 this, SLOT(on_nameedit_changed(const QString&)));
 231         form->addRow(tr("Name"), name_edit);
 232
 233         add_colour_option(parent, form);
 234 }
 235
 236 void Trace::set_name(QString name)
 237 {
 238         base_->set_name(name);
 239 }
 240
 241 void Trace::set_colour(QColor colour)
 242 {
 243         base_->set_colour(colour);
 244 }
 245
 246 void Trace::set_segment_display_mode(SegmentDisplayMode mode)
 247 {
 248         segment_display_mode_ = mode;
 249
 250         if (owner_)
 251                 owner_->row_item_appearance_changed(true, true);
 252 }
 253
 254 void Trace::on_name_changed(const QString &text)
 255 {
 256         /* This event handler is called by SignalBase when the name was changed there */
 257         (void)text;
 258
 259         if (owner_) {
 260                 owner_->extents_changed(true, false);
 261                 owner_->row_item_appearance_changed(true, false);
 262         }
 263 }
 264
 265 void Trace::on_colour_changed(const QColor &colour)
 266 {
 267         /* This event handler is called by SignalBase when the colour was changed there */
 268         (void)colour;
 269
 270         if (owner_)
 271                 owner_->row_item_appearance_changed(true, true);
 272 }
 273
 274 void Trace::on_popup_closed()
 275 {
 276         popup_ = nullptr;
 277         popup_form_ = nullptr;
 278 }
 279
 280 void Trace::on_nameedit_changed(const QString &name)
 281 {
 282         /* This event handler notifies SignalBase that the name changed */
 283         set_name(name);
 284 }
 285
 286 void Trace::on_colouredit_changed(const QColor &colour)
 287 {
 288         /* This event handler notifies SignalBase that the colour changed */
 289         set_colour(colour);
 290 }
 291
 292 } // namespace trace
 293 } // namespace views
 294 } // namespace pv