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, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
  19  */
  20
  21 #include <extdef.h>
  22
  23 #include <assert.h>
  24 #include <cmath>
  25
  26 #include <QApplication>
  27 #include <QFormLayout>
  28 #include <QKeyEvent>
  29 #include <QLineEdit>
  30
  31 #include "trace.hpp"
  32 #include "tracepalette.hpp"
  33 #include "view.hpp"
  34
  35 #include <pv/widgets/colourbutton.hpp>
  36 #include <pv/widgets/popup.hpp>
  37
  38 namespace pv {
  39 namespace views {
  40 namespace TraceView {
  41
  42 const QPen Trace::AxisPen(QColor(0, 0, 0, 30*256/100));
  43 const int Trace::LabelHitPadding = 2;
  44
  45 const QColor Trace::BrightGrayBGColour = QColor(0, 0, 0, 10*255/100);
  46 const QColor Trace::DarkGrayBGColour = QColor(0, 0, 0, 15*255/100);
  47
  48 Trace::Trace(std::shared_ptr<data::SignalBase> channel) :
  49         base_(channel),
  50         coloured_bg_(true), // Default setting is set in MainWindow::setup_ui()
  51         popup_(nullptr),
  52         popup_form_(nullptr)
  53 {
  54         connect(channel.get(), SIGNAL(name_changed(const QString&)),
  55                 this, SLOT(on_name_changed(const QString&)));
  56         connect(channel.get(), SIGNAL(colour_changed(const QColor&)),
  57                 this, SLOT(on_colour_changed(const QColor&)));
  58 }
  59
  60 void Trace::set_coloured_bg(bool state)
  61 {
  62         coloured_bg_ = state;
  63 }
  64
  65 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
  66 {
  67         const int y = get_visual_y();
  68
  69         p.setBrush(base_->colour());
  70
  71         if (!enabled())
  72                 return;
  73
  74         const QRectF r = label_rect(rect);
  75
  76         // Paint the label
  77         const float label_arrow_length = r.height() / 2;
  78         const QPointF points[] = {
  79                 r.topLeft(),
  80                 QPointF(r.right() - label_arrow_length, r.top()),
  81                 QPointF(r.right(), y),
  82                 QPointF(r.right() - label_arrow_length, r.bottom()),
  83                 r.bottomLeft()
  84         };
  85         const QPointF highlight_points[] = {
  86                 QPointF(r.left() + 1, r.top() + 1),
  87                 QPointF(r.right() - label_arrow_length, r.top() + 1),
  88                 QPointF(r.right() - 1, y),
  89                 QPointF(r.right() - label_arrow_length, r.bottom() - 1),
  90                 QPointF(r.left() + 1, r.bottom() - 1)
  91         };
  92
  93         if (selected()) {
  94                 p.setPen(highlight_pen());
  95                 p.setBrush(Qt::transparent);
  96                 p.drawPolygon(points, countof(points));
  97         }
  98
  99         p.setPen(Qt::transparent);
 100         p.setBrush(hover ? base_->colour().lighter() : base_->colour());
 101         p.drawPolygon(points, countof(points));
 102
 103         p.setPen(base_->colour().lighter());
 104         p.setBrush(Qt::transparent);
 105         p.drawPolygon(highlight_points, countof(highlight_points));
 106
 107         p.setPen(base_->colour().darker());
 108         p.setBrush(Qt::transparent);
 109         p.drawPolygon(points, countof(points));
 110
 111         // Paint the text
 112         p.setPen(select_text_colour(base_->colour()));
 113         p.setFont(QApplication::font());
 114         p.drawText(QRectF(r.x(), r.y(),
 115                 r.width() - label_arrow_length, r.height()),
 116                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
 117 }
 118
 119 QMenu* Trace::create_context_menu(QWidget *parent)
 120 {
 121         QMenu *const menu = ViewItem::create_context_menu(parent);
 122
 123         return menu;
 124 }
 125
 126 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 127 {
 128         using pv::widgets::Popup;
 129
 130         popup_ = new Popup(parent);
 131         popup_->set_position(parent->mapToGlobal(
 132                 point(parent->rect())), Popup::Right);
 133
 134         create_popup_form();
 135
 136         connect(popup_, SIGNAL(closed()),
 137                 this, SLOT(on_popup_closed()));
 138
 139         return popup_;
 140 }
 141
 142 QRectF Trace::label_rect(const QRectF &rect) const
 143 {
 144         QFontMetrics m(QApplication::font());
 145         const QSize text_size(
 146                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
 147         const QSizeF label_size(
 148                 text_size.width() + LabelPadding.width() * 2,
 149                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 150         const float half_height = label_size.height() / 2;
 151         return QRectF(
 152                 rect.right() - half_height - label_size.width() - 0.5,
 153                 get_visual_y() + 0.5f - half_height,
 154                 label_size.width() + half_height,
 155                 label_size.height());
 156 }
 157
 158 void Trace::paint_back(QPainter &p, const ViewItemPaintParams &pp)
 159 {
 160         if (coloured_bg_)
 161                 p.setBrush(base_->bgcolour());
 162         else
 163                 p.setBrush(bgcolour_state_ ? BrightGrayBGColour : DarkGrayBGColour);
 164
 165         p.setPen(QPen(Qt::NoPen));
 166
 167         const std::pair<int, int> extents = v_extents();
 168
 169         const int x = 0;
 170         const int y = get_visual_y() + extents.first;
 171         const int w = pp.right() - pp.left();
 172         const int h = extents.second - extents.first;
 173
 174         p.drawRect(x, y, w, h);
 175 }
 176
 177 void Trace::paint_axis(QPainter &p, const ViewItemPaintParams &pp, int y)
 178 {
 179         p.setRenderHint(QPainter::Antialiasing, false);
 180
 181         p.setPen(AxisPen);
 182         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 183
 184         p.setRenderHint(QPainter::Antialiasing, true);
 185 }
 186
 187 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 188 {
 189         using pv::widgets::ColourButton;
 190
 191         ColourButton *const colour_button = new ColourButton(
 192                 TracePalette::Rows, TracePalette::Cols, parent);
 193         colour_button->set_palette(TracePalette::Colours);
 194         colour_button->set_colour(base_->colour());
 195         connect(colour_button, SIGNAL(selected(const QColor&)),
 196                 this, SLOT(on_colouredit_changed(const QColor&)));
 197
 198         form->addRow(tr("Colour"), colour_button);
 199 }
 200
 201 void Trace::create_popup_form()
 202 {
 203         // Clear the layout
 204
 205         // Transfer the layout and the child widgets to a temporary widget
 206         // which we delete after the event was handled. This way, the layout
 207         // and all widgets contained therein are deleted after the event was
 208         // handled, leaving the parent popup_ time to handle the change.
 209         if (popup_form_) {
 210                 QWidget *suicidal = new QWidget();
 211                 suicidal->setLayout(popup_form_);
 212                 suicidal->deleteLater();
 213         }
 214
 215         // Repopulate the popup
 216         popup_form_ = new QFormLayout(popup_);
 217         popup_->setLayout(popup_form_);
 218         populate_popup_form(popup_, popup_form_);
 219 }
 220
 221 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 222 {
 223         QLineEdit *const name_edit = new QLineEdit(parent);
 224         name_edit->setText(base_->name());
 225         connect(name_edit, SIGNAL(textChanged(const QString&)),
 226                 this, SLOT(on_nameedit_changed(const QString&)));
 227         form->addRow(tr("Name"), name_edit);
 228
 229         add_colour_option(parent, form);
 230 }
 231
 232 void Trace::set_name(QString name)
 233 {
 234         base_->set_name(name);
 235 }
 236
 237 void Trace::set_colour(QColor colour)
 238 {
 239         base_->set_colour(colour);
 240 }
 241
 242 void Trace::on_name_changed(const QString &text)
 243 {
 244         /* This event handler is called by SignalBase when the name was changed there */
 245         (void)text;
 246
 247         if (owner_) {
 248                 owner_->extents_changed(true, false);
 249                 owner_->row_item_appearance_changed(true, false);
 250         }
 251 }
 252
 253 void Trace::on_colour_changed(const QColor &colour)
 254 {
 255         /* This event handler is called by SignalBase when the colour was changed there */
 256         (void)colour;
 257
 258         if (owner_)
 259                 owner_->row_item_appearance_changed(true, true);
 260 }
 261
 262 void Trace::on_popup_closed()
 263 {
 264         popup_ = nullptr;
 265         popup_form_ = nullptr;
 266 }
 267
 268 void Trace::on_nameedit_changed(const QString &name)
 269 {
 270         /* This event handler notifies SignalBase that the name changed */
 271         set_name(name);
 272 }
 273
 274 void Trace::on_colouredit_changed(const QColor &colour)
 275 {
 276         /* This event handler notifies SignalBase that the colour changed */
 277         set_colour(colour);
 278 }
 279
 280 } // namespace TraceView
 281 } // namespace views
 282 } // namespace pv