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