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         GlobalSettings settings;
  57         coloured_bg_ = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
  58
  59         connect(channel.get(), SIGNAL(name_changed(const QString&)),
  60                 this, SLOT(on_name_changed(const QString&)));
  61         connect(channel.get(), SIGNAL(colour_changed(const QColor&)),
  62                 this, SLOT(on_colour_changed(const QColor&)));
  63 }
  64
  65 void Trace::set_coloured_bg(bool state)
  66 {
  67         coloured_bg_ = state;
  68 }
  69
  70 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  71 {
  72         const int y = get_visual_y();
  73
  74         p.setBrush(base_->colour());
  75
  76         if (!enabled())
  77                 return;
  78
  79         const QRectF r = label_rect(rect);
  80
  81         // Paint the label
  82         const float label_arrow_length = r.height() / 2;
  83         const QPointF points[] = {
  84                 r.topLeft(),
  85                 QPointF(r.right() - label_arrow_length, r.top()),
  86                 QPointF(r.right(), y),
  87                 QPointF(r.right() - label_arrow_length, r.bottom()),
  88                 r.bottomLeft()
  89         };
  90         const QPointF highlight_points[] = {
  91                 QPointF(r.left() + 1, r.top() + 1),
  92                 QPointF(r.right() - label_arrow_length, r.top() + 1),
  93                 QPointF(r.right() - 1, y),
  94                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
  95                 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                 point(parent->rect())), Popup::Right);
 138
 139         create_popup_form();
 140
 141         connect(popup_, SIGNAL(closed()),
 142                 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, const ViewItemPaintParams &pp)
 164 {
 165         if (coloured_bg_)
 166                 p.setBrush(base_->bgcolour());
 167         else
 168                 p.setBrush(bgcolour_state_ ? BrightGrayBGColour : DarkGrayBGColour);
 169
 170         p.setPen(QPen(Qt::NoPen));
 171
 172         const pair<int, int> extents = v_extents();
 173
 174         const int x = 0;
 175         const int y = get_visual_y() + extents.first;
 176         const int w = pp.right() - pp.left();
 177         const int h = extents.second - extents.first;
 178
 179         p.drawRect(x, y, w, h);
 180 }
 181
 182 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
 183 {
 184         p.setRenderHint(QPainter::Antialiasing, false);
 185
 186         p.setPen(AxisPen);
 187         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 188
 189         p.setRenderHint(QPainter::Antialiasing, true);
 190 }
 191
 192 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 193 {
 194         using pv::widgets::ColourButton;
 195
 196         ColourButton *const colour_button = new ColourButton(
 197                 TracePalette::Rows, TracePalette::Cols, parent);
 198         colour_button->set_palette(TracePalette::Colours);
 199         colour_button->set_colour(base_->colour());
 200         connect(colour_button, SIGNAL(selected(const QColor&)),
 201                 this, SLOT(on_colouredit_changed(const QColor&)));
 202
 203         form->addRow(tr("Colour"), colour_button);
 204 }
 205
 206 void Trace::create_popup_form()
 207 {
 208         // Clear the layout
 209
 210         // Transfer the layout and the child widgets to a temporary widget
 211         // which we delete after the event was handled. This way, the layout
 212         // and all widgets contained therein are deleted after the event was
 213         // handled, leaving the parent popup_ time to handle the change.
 214         if (popup_form_) {
 215                 QWidget *suicidal = new QWidget();
 216                 suicidal->setLayout(popup_form_);
 217                 suicidal->deleteLater();
 218         }
 219
 220         // Repopulate the popup
 221         popup_form_ = new QFormLayout(popup_);
 222         popup_->setLayout(popup_form_);
 223         populate_popup_form(popup_, popup_form_);
 224 }
 225
 226 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 227 {
 228         QLineEdit *const name_edit = new QLineEdit(parent);
 229         name_edit->setText(base_->name());
 230         connect(name_edit, SIGNAL(textChanged(const QString&)),
 231                 this, SLOT(on_nameedit_changed(const QString&)));
 232         form->addRow(tr("Name"), name_edit);
 233
 234         add_colour_option(parent, form);
 235 }
 236
 237 void Trace::set_name(QString name)
 238 {
 239         base_->set_name(name);
 240 }
 241
 242 void Trace::set_colour(QColor colour)
 243 {
 244         base_->set_colour(colour);
 245 }
 246
 247 void Trace::on_name_changed(const QString &text)
 248 {
 249         /* This event handler is called by SignalBase when the name was changed there */
 250         (void)text;
 251
 252         if (owner_) {
 253                 owner_->extents_changed(true, false);
 254                 owner_->row_item_appearance_changed(true, false);
 255         }
 256 }
 257
 258 void Trace::on_colour_changed(const QColor &colour)
 259 {
 260         /* This event handler is called by SignalBase when the colour was changed there */
 261         (void)colour;
 262
 263         if (owner_)
 264                 owner_->row_item_appearance_changed(true, true);
 265 }
 266
 267 void Trace::on_popup_closed()
 268 {
 269         popup_ = nullptr;
 270         popup_form_ = nullptr;
 271 }
 272
 273 void Trace::on_nameedit_changed(const QString &name)
 274 {
 275         /* This event handler notifies SignalBase that the name changed */
 276         set_name(name);
 277 }
 278
 279 void Trace::on_colouredit_changed(const QColor &colour)
 280 {
 281         /* This event handler notifies SignalBase that the colour changed */
 282         set_colour(colour);
 283 }
 284
 285 } // namespace TraceView
 286 } // namespace views
 287 } // namespace pv