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