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