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 #include <QMenu>
  30
  31 #include "ruler.hpp"
  32 #include "trace.hpp"
  33 #include "tracepalette.hpp"
  34 #include "view.hpp"
  35
  36 #include "pv/globalsettings.hpp"
  37 #include "pv/widgets/colorbutton.hpp"
  38 #include "pv/widgets/popup.hpp"
  39
  40 using std::pair;
  41 using std::shared_ptr;
  42
  43 namespace pv {
  44 namespace views {
  45 namespace trace {
  46
  47 const QPen Trace::AxisPen(QColor(0, 0, 0, 30 * 256 / 100));
  48 const int Trace::LabelHitPadding = 2;
  49
  50 const QColor Trace::BrightGrayBGColor = QColor(0, 0, 0, 10 * 255 / 100);
  51 const QColor Trace::DarkGrayBGColor = QColor(0, 0, 0, 15 * 255 / 100);
  52
  53 Trace::Trace(shared_ptr<data::SignalBase> channel) :
  54         base_(channel),
  55         axis_pen_(AxisPen),
  56         segment_display_mode_(ShowLastSegmentOnly),  // Will be overwritten by View
  57         current_segment_(0),
  58         popup_(nullptr),
  59         popup_form_(nullptr)
  60 {
  61         connect(channel.get(), SIGNAL(name_changed(const QString&)),
  62                 this, SLOT(on_name_changed(const QString&)));
  63         connect(channel.get(), SIGNAL(color_changed(const QColor&)),
  64                 this, SLOT(on_color_changed(const QColor&)));
  65
  66         GlobalSettings::add_change_handler(this);
  67
  68         GlobalSettings settings;
  69         show_hover_marker_ =
  70                 settings.value(GlobalSettings::Key_View_ShowHoverMarker).toBool();
  71 }
  72
  73 Trace::~Trace()
  74 {
  75         GlobalSettings::remove_change_handler(this);
  76 }
  77
  78 shared_ptr<data::SignalBase> Trace::base() const
  79 {
  80         return base_;
  81 }
  82
  83 bool Trace::is_selectable(QPoint pos) const
  84 {
  85         // True if the header was clicked, false if the trace area was clicked
  86         const View *view = owner_->view();
  87         assert(view);
  88
  89         return (pos.x() <= view->header_width());
  90 }
  91
  92 bool Trace::is_draggable(QPoint pos) const
  93 {
  94         // While the header label that belongs to this trace is draggable,
  95         // the trace itself shall not be. Hence we return true if the header
  96         // was clicked and false if the trace area was clicked
  97         const View *view = owner_->view();
  98         assert(view);
  99
 100         return (pos.x() <= view->header_width());
 101 }
 102
 103 void Trace::set_segment_display_mode(SegmentDisplayMode mode)
 104 {
 105         segment_display_mode_ = mode;
 106
 107         if (owner_)
 108                 owner_->row_item_appearance_changed(true, true);
 109 }
 110
 111 void Trace::on_setting_changed(const QString &key, const QVariant &value)
 112 {
 113         if (key == GlobalSettings::Key_View_ShowHoverMarker)
 114                 show_hover_marker_ = value.toBool();
 115
 116         // Force a repaint since many options alter the way traces look
 117         if (owner_)
 118                 owner_->row_item_appearance_changed(false, true);
 119 }
 120
 121 void Trace::paint_label(QPainter &p, const QRect &rect, bool hover)
 122 {
 123         const int y = get_visual_y();
 124
 125         p.setBrush(base_->color());
 126
 127         if (!enabled())
 128                 return;
 129
 130         const QRectF r = label_rect(rect);
 131
 132         // When selected, move the arrow to the left so that the border can show
 133         const QPointF offs = (selected()) ? QPointF(-2, 0) : QPointF(0, 0);
 134
 135         // Paint the label
 136         const float label_arrow_length = r.height() / 2;
 137         QPointF points[] = {
 138                 offs + r.topLeft(),
 139                 offs + QPointF(r.right() - label_arrow_length, r.top()),
 140                 offs + QPointF(r.right(), y),
 141                 offs + QPointF(r.right() - label_arrow_length, r.bottom()),
 142                 offs + r.bottomLeft()
 143         };
 144         QPointF highlight_points[] = {
 145                 offs + QPointF(r.left() + 1, r.top() + 1),
 146                 offs + QPointF(r.right() - label_arrow_length, r.top() + 1),
 147                 offs + QPointF(r.right() - 1, y),
 148                 offs + QPointF(r.right() - label_arrow_length, r.bottom() - 1),
 149                 offs + QPointF(r.left() + 1, r.bottom() - 1)
 150         };
 151
 152         if (selected()) {
 153                 p.setPen(highlight_pen());
 154                 p.setBrush(Qt::transparent);
 155                 p.drawPolygon(points, countof(points));
 156         }
 157
 158         p.setPen(Qt::transparent);
 159         p.setBrush(hover ? base_->color().lighter() : base_->color());
 160         p.drawPolygon(points, countof(points));
 161
 162         p.setPen(base_->color().lighter());
 163         p.setBrush(Qt::transparent);
 164         p.drawPolygon(highlight_points, countof(highlight_points));
 165
 166         p.setPen(base_->color().darker());
 167         p.setBrush(Qt::transparent);
 168         p.drawPolygon(points, countof(points));
 169
 170         // Paint the text
 171         p.setPen(select_text_color(base_->color()));
 172         p.setFont(QApplication::font());
 173         p.drawText(QRectF(r.x(), r.y(),
 174                 r.width() - label_arrow_length, r.height()),
 175                 Qt::AlignCenter | Qt::AlignVCenter, base_->name());
 176 }
 177
 178 QMenu* Trace::create_header_context_menu(QWidget *parent)
 179 {
 180         QMenu *const menu = ViewItem::create_header_context_menu(parent);
 181
 182         return menu;
 183 }
 184
 185 QMenu* Trace::create_view_context_menu(QWidget *parent, QPoint &click_pos)
 186 {
 187         context_menu_x_pos_ = click_pos.x();
 188
 189         // Get entries from default menu before adding our own
 190         QMenu *const menu = new QMenu(parent);
 191
 192         QMenu* default_menu = TraceTreeItem::create_view_context_menu(parent, click_pos);
 193         if (default_menu) {
 194                 for (QAction *action : default_menu->actions()) {
 195                         menu->addAction(action);
 196                         if (action->parent() == default_menu)
 197                                 action->setParent(menu);
 198                 }
 199                 delete default_menu;
 200
 201                 // Add separator if needed
 202                 if (menu->actions().length() > 0)
 203                         menu->addSeparator();
 204         }
 205
 206         QAction *const create_marker_here = new QAction(tr("Create marker here"), this);
 207         connect(create_marker_here, SIGNAL(triggered()), this, SLOT(on_create_marker_here()));
 208         menu->addAction(create_marker_here);
 209
 210         return menu;
 211 }
 212
 213 pv::widgets::Popup* Trace::create_popup(QWidget *parent)
 214 {
 215         using pv::widgets::Popup;
 216
 217         popup_ = new Popup(parent);
 218         popup_->set_position(parent->mapToGlobal(
 219                 drag_point(parent->rect())), Popup::Right);
 220
 221         create_popup_form();
 222
 223         connect(popup_, SIGNAL(closed()), this, SLOT(on_popup_closed()));
 224
 225         return popup_;
 226 }
 227
 228 QRectF Trace::label_rect(const QRectF &rect) const
 229 {
 230         QFontMetrics m(QApplication::font());
 231         const QSize text_size(
 232                 m.boundingRect(QRect(), 0, base_->name()).width(), m.height());
 233         const QSizeF label_size(
 234                 text_size.width() + LabelPadding.width() * 2,
 235                 ceilf((text_size.height() + LabelPadding.height() * 2) / 2) * 2);
 236         const float half_height = label_size.height() / 2;
 237         return QRectF(
 238                 rect.right() - half_height - label_size.width() - 0.5,
 239                 get_visual_y() + 0.5f - half_height,
 240                 label_size.width() + half_height,
 241                 label_size.height());
 242 }
 243
 244 QRectF Trace::hit_box_rect(const ViewItemPaintParams &pp) const
 245 {
 246         // This one is only for the trace itself, excluding the header area
 247         const View *view = owner_->view();
 248         assert(view);
 249
 250         pair<int, int> extents = v_extents();
 251         const int top = pp.top() + get_visual_y() + extents.first;
 252         const int height = extents.second - extents.first;
 253
 254         return QRectF(pp.left() + view->header_width(), top,
 255                 pp.width() - view->header_width(), height);
 256 }
 257
 258 void Trace::set_current_segment(const int segment)
 259 {
 260         current_segment_ = segment;
 261 }
 262
 263 int Trace::get_current_segment() const
 264 {
 265         return current_segment_;
 266 }
 267
 268 void Trace::hover_point_changed(const QPoint &hp)
 269 {
 270         (void)hp;
 271
 272         if (owner_)
 273                 owner_->row_item_appearance_changed(false, true);
 274 }
 275
 276 void Trace::paint_back(QPainter &p, ViewItemPaintParams &pp)
 277 {
 278         const View *view = owner_->view();
 279         assert(view);
 280
 281         if (view->colored_bg())
 282                 p.setBrush(base_->bgcolor());
 283         else
 284                 p.setBrush(pp.next_bg_color_state() ? BrightGrayBGColor : DarkGrayBGColor);
 285
 286         p.setPen(QPen(Qt::NoPen));
 287
 288         const pair<int, int> extents = v_extents();
 289         p.drawRect(pp.left(), get_visual_y() + extents.first,
 290                 pp.width(), extents.second - extents.first);
 291 }
 292
 293 void Trace::paint_axis(QPainter &p, ViewItemPaintParams &pp, int y)
 294 {
 295         p.setRenderHint(QPainter::Antialiasing, false);
 296
 297         p.setPen(axis_pen_);
 298         p.drawLine(QPointF(pp.left(), y), QPointF(pp.right(), y));
 299
 300         p.setRenderHint(QPainter::Antialiasing, true);
 301 }
 302
 303 void Trace::add_color_option(QWidget *parent, QFormLayout *form)
 304 {
 305         using pv::widgets::ColorButton;
 306
 307         ColorButton *const color_button = new ColorButton(
 308                 TracePalette::Rows, TracePalette::Cols, parent);
 309         color_button->set_palette(TracePalette::Colors);
 310         color_button->set_color(base_->color());
 311         connect(color_button, SIGNAL(selected(const QColor&)),
 312                 this, SLOT(on_coloredit_changed(const QColor&)));
 313
 314         form->addRow(tr("Color"), color_button);
 315 }
 316
 317 void Trace::paint_hover_marker(QPainter &p)
 318 {
 319         const View *view = owner_->view();
 320         assert(view);
 321
 322         const int x = view->hover_point().x();
 323
 324         if (x == -1)
 325                 return;
 326
 327         p.setPen(QPen(QColor(Qt::lightGray)));
 328
 329         const pair<int, int> extents = v_extents();
 330
 331         p.setRenderHint(QPainter::Antialiasing, false);
 332         p.drawLine(x, get_visual_y() + extents.first,
 333                 x, get_visual_y() + extents.second);
 334         p.setRenderHint(QPainter::Antialiasing, true);
 335 }
 336
 337 void Trace::create_popup_form()
 338 {
 339         // Clear the layout
 340
 341         // Transfer the layout and the child widgets to a temporary widget
 342         // which we delete after the event was handled. This way, the layout
 343         // and all widgets contained therein are deleted after the event was
 344         // handled, leaving the parent popup_ time to handle the change.
 345         if (popup_form_) {
 346                 QWidget *suicidal = new QWidget();
 347                 suicidal->setLayout(popup_form_);
 348                 suicidal->deleteLater();
 349         }
 350
 351         // Repopulate the popup
 352         popup_form_ = new QFormLayout(popup_);
 353         popup_->setLayout(popup_form_);
 354         populate_popup_form(popup_, popup_form_);
 355 }
 356
 357 void Trace::populate_popup_form(QWidget *parent, QFormLayout *form)
 358 {
 359         QLineEdit *const name_edit = new QLineEdit(parent);
 360         name_edit->setText(base_->name());
 361         connect(name_edit, SIGNAL(textChanged(const QString&)),
 362                 this, SLOT(on_nameedit_changed(const QString&)));
 363         form->addRow(tr("Name"), name_edit);
 364
 365         add_color_option(parent, form);
 366 }
 367
 368 void Trace::on_name_changed(const QString &text)
 369 {
 370         /* This event handler is called by SignalBase when the name was changed there */
 371         (void)text;
 372
 373         if (owner_) {
 374                 owner_->extents_changed(true, false);
 375                 owner_->row_item_appearance_changed(true, false);
 376         }
 377 }
 378
 379 void Trace::on_color_changed(const QColor &color)
 380 {
 381         /* This event handler is called by SignalBase when the color was changed there */
 382         (void)color;
 383
 384         if (owner_)
 385                 owner_->row_item_appearance_changed(true, true);
 386 }
 387
 388 void Trace::on_popup_closed()
 389 {
 390         popup_ = nullptr;
 391         popup_form_ = nullptr;
 392 }
 393
 394 void Trace::on_nameedit_changed(const QString &name)
 395 {
 396         /* This event handler notifies SignalBase that the name changed */
 397         base_->set_name(name);
 398 }
 399
 400 void Trace::on_coloredit_changed(const QColor &color)
 401 {
 402         /* This event handler notifies SignalBase that the color changed */
 403         base_->set_color(color);
 404 }
 405
 406 void Trace::on_create_marker_here() const
 407 {
 408         View *view = owner_->view();
 409         assert(view);
 410
 411         const Ruler *ruler = view->ruler();
 412         QPoint p = ruler->mapFrom(view, QPoint(context_menu_x_pos_, 0));
 413
 414         view->add_flag(ruler->get_time_from_x_pos(p.x()));
 415 }
 416
 417 } // namespace trace
 418 } // namespace views
 419 } // namespace pv