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