pv/views/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         axis_pen_(AxisPen),
  54         segment_display_mode_(ShowLastSegmentOnly),  // Will be overwritten by View
  55         current_segment_(0),
  56         popup_(nullptr),
  57         popup_form_(nullptr)
  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 shared_ptr<data::SignalBase> Trace::base() const
  66 {
  67         return base_;
  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         // When selected, move the arrow to the left so that the border can show
  82         const QPointF offs = (selected()) ? QPointF(-2, 0) : QPointF(0, 0);
  83
  84         // Paint the label
  85         const float label_arrow_length = r.height() / 2;
  86         QPointF points[] = {
  87                 offs + r.topLeft(),
  88                 offs + QPointF(r.right() - label_arrow_length, r.top()),
  89                 offs + QPointF(r.right(), y),
  90                 offs + QPointF(r.right() - label_arrow_length, r.bottom()),
  91                 offs + r.bottomLeft()
  92         };
  93         QPointF highlight_points[] = {
  94                 offs + QPointF(r.left() + 1, r.top() + 1),
  95                 offs + QPointF(r.right() - label_arrow_length, r.top() + 1),
  96                 offs + QPointF(r.right() - 1, y),
  97                 offs + QPointF(r.right() - label_arrow_length, r.bottom() - 1),
  98                 offs + QPointF(r.left() + 1, r.bottom() - 1)
  99         };
 100
 101         if (selected()) {
 102                 p.setPen(highlight_pen());
 103                 p.setBrush(Qt::transparent);
 104                 p.drawPolygon(points, countof(points));
 105         }
 106
 107         p.setPen(Qt::transparent);
 108         p.setBrush(hover ? base_->colour().lighter() : base_->colour());
 109         p.drawPolygon(points, countof(points));
 110
 111         p.setPen(base_->colour().lighter());
 112         p.setBrush(Qt::transparent);
 113         p.drawPolygon(highlight_points, countof(highlight_points));
 114
 115         p.setPen(base_->colour().darker());
 116         p.setBrush(Qt::transparent);
 117         p.drawPolygon(points, countof(points));
 118
 119         // Paint the text
 120         p.setPen(select_text_colour(base_->colour()));
 121         p.setFont(QApplication::font());
 122         p.drawText(QRectF(r.x(), r.y(),
 123                 r.width() - label_arrow_length, r.height()),
 124                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
 125 }
 126
 127 QMenu* Trace::create_context_menu(QWidget *parent)
 128 {
 129         QMenu *const menu = ViewItem::create_context_menu(parent);
 130
 131         return menu;
 132 }
 133
 134 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 135 {
 136         using pv::widgets::Popup;
 137
 138         popup_ = new Popup(parent);
 139         popup_->set_position(parent->mapToGlobal(
 140                 drag_point(parent->rect())), Popup::Right);
 141
 142         create_popup_form();
 143
 144         connect(popup_, SIGNAL(closed()), this, SLOT(on_popup_closed()));
 145
 146         return popup_;
 147 }
 148
 149 QRectF Trace::label_rect(const QRectF &rect) const
 150 {
 151         QFontMetrics m(QApplication::font());
 152         const QSize text_size(
 153                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
 154         const QSizeF label_size(
 155                 text_size.width() + LabelPadding.width() * 2,
 156                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 157         const float half_height = label_size.height() / 2;
 158         return QRectF(
 159                 rect.right() - half_height - label_size.width() - 0.5,
 160                 get_visual_y() + 0.5f - half_height,
 161                 label_size.width() + half_height,
 162                 label_size.height());
 163 }
 164
 165 void Trace::set_current_segment(const int segment)
 166 {
 167         current_segment_ = segment;
 168 }
 169
 170 int Trace::get_current_segment() const
 171 {
 172         return current_segment_;
 173 }
 174
 175 void Trace::paint_back(QPainter &p, ViewItemPaintParams &pp)
 176 {
 177         const View *view = owner_->view();
 178         assert(view);
 179
 180         if (view->coloured_bg())
 181                 p.setBrush(base_->bgcolour());
 182         else
 183                 p.setBrush(pp.next_bg_colour_state() ? BrightGrayBGColour : DarkGrayBGColour);
 184
 185         p.setPen(QPen(Qt::NoPen));
 186
 187         const pair<int, int> extents = v_extents();
 188         p.drawRect(pp.left(), get_visual_y() + extents.first,
 189                 pp.width(), extents.second - extents.first);
 190 }
 191
 192 void Trace::paint_axis(QPainter &p, ViewItemPaintParams &pp, int y)
 193 {
 194         p.setRenderHint(QPainter::Antialiasing, false);
 195
 196         p.setPen(axis_pen_);
 197         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 198
 199         p.setRenderHint(QPainter::Antialiasing, true);
 200 }
 201
 202 void Trace::add_colour_option(QWidget *parent, QFormLayout *form)
 203 {
 204         using pv::widgets::ColourButton;
 205
 206         ColourButton *const colour_button = new ColourButton(
 207                 TracePalette::Rows, TracePalette::Cols, parent);
 208         colour_button->set_palette(TracePalette::Colours);
 209         colour_button->set_colour(base_->colour());
 210         connect(colour_button, SIGNAL(selected(const QColor&)),
 211                 this, SLOT(on_colouredit_changed(const QColor&)));
 212
 213         form->addRow(tr("Colour"), colour_button);
 214 }
 215
 216 void Trace::create_popup_form()
 217 {
 218         // Clear the layout
 219
 220         // Transfer the layout and the child widgets to a temporary widget
 221         // which we delete after the event was handled. This way, the layout
 222         // and all widgets contained therein are deleted after the event was
 223         // handled, leaving the parent popup_ time to handle the change.
 224         if (popup_form_) {
 225                 QWidget *suicidal = new QWidget();
 226                 suicidal->setLayout(popup_form_);
 227                 suicidal->deleteLater();
 228         }
 229
 230         // Repopulate the popup
 231         popup_form_ = new QFormLayout(popup_);
 232         popup_->setLayout(popup_form_);
 233         populate_popup_form(popup_, popup_form_);
 234 }
 235
 236 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 237 {
 238         QLineEdit *const name_edit = new QLineEdit(parent);
 239         name_edit->setText(base_->name());
 240         connect(name_edit, SIGNAL(textChanged(const QString&)),
 241                 this, SLOT(on_nameedit_changed(const QString&)));
 242         form->addRow(tr("Name"), name_edit);
 243
 244         add_colour_option(parent, form);
 245 }
 246
 247 void Trace::set_name(QString name)
 248 {
 249         base_->set_name(name);
 250 }
 251
 252 void Trace::set_colour(QColor colour)
 253 {
 254         base_->set_colour(colour);
 255 }
 256
 257 void Trace::set_segment_display_mode(SegmentDisplayMode mode)
 258 {
 259         segment_display_mode_ = mode;
 260
 261         if (owner_)
 262                 owner_->row_item_appearance_changed(true, true);
 263 }
 264
 265 void Trace::on_name_changed(const QString &text)
 266 {
 267         /* This event handler is called by SignalBase when the name was changed there */
 268         (void)text;
 269
 270         if (owner_) {
 271                 owner_->extents_changed(true, false);
 272                 owner_->row_item_appearance_changed(true, false);
 273         }
 274 }
 275
 276 void Trace::on_colour_changed(const QColor &colour)
 277 {
 278         /* This event handler is called by SignalBase when the colour was changed there */
 279         (void)colour;
 280
 281         if (owner_)
 282                 owner_->row_item_appearance_changed(true, true);
 283 }
 284
 285 void Trace::on_popup_closed()
 286 {
 287         popup_ = nullptr;
 288         popup_form_ = nullptr;
 289 }
 290
 291 void Trace::on_nameedit_changed(const QString &name)
 292 {
 293         /* This event handler notifies SignalBase that the name changed */
 294         set_name(name);
 295 }
 296
 297 void Trace::on_colouredit_changed(const QColor &colour)
 298 {
 299         /* This event handler notifies SignalBase that the colour changed */
 300         set_colour(colour);
 301 }
 302
 303 } // namespace trace
 304 } // namespace views
 305 } // namespace pv