pv/mainwindow.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 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 <cassert>
  22
  23 #ifdef ENABLE_DECODE
  24 #include <libsigrokdecode/libsigrokdecode.h>
  25 #endif
  26
  27 #include <algorithm>
  28 #include <iterator>
  29
  30 #include <QAction>
  31 #include <QApplication>
  32 #include <QCloseEvent>
  33 #include <QDockWidget>
  34 #include <QHBoxLayout>
  35 #include <QMessageBox>
  36 #include <QSettings>
  37 #include <QWidget>
  38
  39 #include "mainwindow.hpp"
  40
  41 #include "devicemanager.hpp"
  42 #include "util.hpp"
  43 #include "devices/hardwaredevice.hpp"
  44 #include "dialogs/about.hpp"
  45 #include "toolbars/mainbar.hpp"
  46 #include "view/view.hpp"
  47 #include "views/trace/standardbar.hpp"
  48
  49 #include <stdint.h>
  50 #include <stdarg.h>
  51 #include <libsigrokcxx/libsigrokcxx.hpp>
  52
  53 using std::dynamic_pointer_cast;
  54 using std::list;
  55 using std::make_shared;
  56 using std::map;
  57 using std::shared_ptr;
  58 using std::string;
  59
  60 namespace pv {
  61
  62 namespace view {
  63 class ViewItem;
  64 }
  65
  66 using toolbars::MainBar;
  67
  68 const QString MainWindow::WindowTitle = tr("PulseView");
  69
  70 MainWindow::MainWindow(DeviceManager &device_manager,
  71         string open_file_name, string open_file_format,
  72         QWidget *parent) :
  73         QMainWindow(parent),
  74         device_manager_(device_manager),
  75         session_selector_(this),
  76         session_state_mapper_(this),
  77         action_view_sticky_scrolling_(new QAction(this)),
  78         action_view_coloured_bg_(new QAction(this)),
  79         action_about_(new QAction(this)),
  80         icon_red_(":/icons/status-red.svg"),
  81         icon_green_(":/icons/status-green.svg"),
  82         icon_grey_(":/icons/status-grey.svg")
  83 {
  84         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  85
  86         setup_ui();
  87         restore_ui_settings();
  88
  89         if (!open_file_name.empty()) {
  90                 shared_ptr<Session> session = add_session();
  91                 session->load_init_file(open_file_name, open_file_format);
  92         }
  93
  94         // Add empty default session if there aren't any sessions
  95         if (sessions_.size() == 0) {
  96                 shared_ptr<Session> session = add_session();
  97
  98                 map<string, string> dev_info;
  99                 shared_ptr<devices::HardwareDevice> other_device, demo_device;
 100
 101                 // Use any available device that's not demo
 102                 for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
 103                         if (dev->hardware_device()->driver()->name() == "demo") {
 104                                 demo_device = dev;
 105                         } else {
 106                                 other_device = dev;
 107                         }
 108                 }
 109
 110                 // ...and if there isn't any, just use demo then
 111                 session->select_device(other_device ? other_device : demo_device);
 112         }
 113 }
 114
 115 MainWindow::~MainWindow()
 116 {
 117         while (!sessions_.empty())
 118                 remove_session(sessions_.front());
 119 }
 120
 121 QAction* MainWindow::action_view_sticky_scrolling() const
 122 {
 123         return action_view_sticky_scrolling_;
 124 }
 125
 126 QAction* MainWindow::action_view_coloured_bg() const
 127 {
 128         return action_view_coloured_bg_;
 129 }
 130
 131 QAction* MainWindow::action_about() const
 132 {
 133         return action_about_;
 134 }
 135
 136 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 137 {
 138         // If there's only one view, use it...
 139         if (view_docks_.size() == 1)
 140                 return view_docks_.begin()->second;
 141
 142         // ...otherwise find the dock widget the widget with focus is contained in
 143         QObject *w = QApplication::focusWidget();
 144         QDockWidget *dock = 0;
 145
 146         while (w) {
 147             dock = qobject_cast<QDockWidget*>(w);
 148             if (dock)
 149                 break;
 150             w = w->parent();
 151         }
 152
 153         // Get the view contained in the dock widget
 154         for (auto entry : view_docks_)
 155                 if (entry.first == dock)
 156                         return entry.second;
 157
 158         return nullptr;
 159 }
 160
 161 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 162         views::ViewType type, Session &session)
 163 {
 164         QMainWindow *main_window;
 165         for (auto entry : session_windows_)
 166                 if (entry.first.get() == &session)
 167                         main_window = entry.second;
 168
 169         assert(main_window);
 170
 171         if (type == views::ViewTypeTrace) {
 172                 QDockWidget* dock = new QDockWidget(title, main_window);
 173                 dock->setObjectName(title);
 174                 main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 175
 176                 // Insert a QMainWindow into the dock widget to allow for a tool bar
 177                 QMainWindow *dock_main = new QMainWindow(dock);
 178                 dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 179
 180                 shared_ptr<views::TraceView::View> v =
 181                         make_shared<views::TraceView::View>(session, dock_main);
 182                 view_docks_[dock] = v;
 183                 session.register_view(v);
 184
 185                 dock_main->setCentralWidget(v.get());
 186                 dock->setWidget(dock_main);
 187
 188                 dock->setFeatures(QDockWidget::DockWidgetMovable |
 189                         QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 190
 191                 QAbstractButton *close_btn =
 192                         dock->findChildren<QAbstractButton*>
 193                                 ("qt_dockwidget_closebutton").front();
 194
 195                 connect(close_btn, SIGNAL(clicked(bool)),
 196                         this, SLOT(on_view_close_clicked()));
 197
 198                 if (type == views::ViewTypeTrace) {
 199                         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 200                                 qobject_cast<views::ViewBase*>(v.get()),
 201                                 SLOT(trigger_event(util::Timestamp)));
 202
 203                         v->enable_sticky_scrolling(action_view_sticky_scrolling_->isChecked());
 204                         v->enable_coloured_bg(action_view_coloured_bg_->isChecked());
 205
 206                         shared_ptr<MainBar> main_bar = session.main_bar();
 207                         if (!main_bar) {
 208                                 /* Initial view, create the main bar */
 209                                 main_bar = make_shared<MainBar>(session, this, v.get());
 210                                 dock_main->addToolBar(main_bar.get());
 211                                 session.set_main_bar(main_bar);
 212
 213                                 connect(main_bar.get(), SIGNAL(new_view(Session*)),
 214                                         this, SLOT(on_new_view(Session*)));
 215                         } else {
 216                                 /* Additional view, create a standard bar */
 217                                 dock_main->addToolBar(
 218                                         new pv::views::trace::StandardBar(session, this, v.get()));
 219                         }
 220                         main_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 221
 222                         connect(v.get(), SIGNAL(always_zoom_to_fit_changed(bool)),
 223                                 main_bar.get(), SLOT(on_always_zoom_to_fit_changed(bool)));
 224                 }
 225
 226                 return v;
 227         }
 228
 229         return nullptr;
 230 }
 231
 232 shared_ptr<Session> MainWindow::add_session()
 233 {
 234         static int last_session_id = 1;
 235         QString name = tr("Untitled-%1").arg(last_session_id++);
 236
 237         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 238
 239         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 240                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 241         connect(session.get(), SIGNAL(name_changed()),
 242                 this, SLOT(on_session_name_changed()));
 243         session_state_mapper_.setMapping(session.get(), session.get());
 244         connect(session.get(), SIGNAL(capture_state_changed(int)),
 245                 &session_state_mapper_, SLOT(map()));
 246
 247         sessions_.push_back(session);
 248
 249         QMainWindow *window = new QMainWindow();
 250         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 251         session_windows_[session] = window;
 252
 253         int index = session_selector_.addTab(window, name);
 254         session_selector_.setCurrentIndex(index);
 255         last_focused_session_ = session;
 256
 257         window->setDockNestingEnabled(true);
 258
 259         shared_ptr<views::ViewBase> main_view =
 260                 add_view(name, views::ViewTypeTrace, *session);
 261
 262         return session;
 263 }
 264
 265 void MainWindow::remove_session(shared_ptr<Session> session)
 266 {
 267         int h = new_session_button_->height();
 268
 269         for (shared_ptr<views::ViewBase> view : session->views()) {
 270                 // Find the dock the view is contained in and remove it
 271                 for (auto entry : view_docks_)
 272                         if (entry.second == view) {
 273                                 // Remove the view from the session
 274                                 session->deregister_view(view);
 275
 276                                 // Remove the view from its parent; otherwise, Qt will
 277                                 // call deleteLater() on it, which causes a double free
 278                                 // since the shared_ptr in view_docks_ doesn't know
 279                                 // that Qt keeps a pointer to the view around
 280                                 entry.second->setParent(0);
 281
 282                                 // Remove this entry from the container
 283                                 view_docks_.erase(entry.first);
 284                         }
 285         }
 286
 287         QMainWindow *window = session_windows_.at(session);
 288         session_selector_.removeTab(session_selector_.indexOf(window));
 289
 290         session_windows_.erase(session);
 291
 292         if (last_focused_session_ == session)
 293                 last_focused_session_.reset();
 294
 295         sessions_.remove_if([&](shared_ptr<Session> s) {
 296                 return s == session; });
 297
 298         if (sessions_.empty()) {
 299                 // When there are no more tabs, the height of the QTabWidget
 300                 // drops to zero. We must prevent this to keep the static
 301                 // widgets visible
 302                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 303                         w->setMinimumHeight(h);
 304
 305                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 306                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 307                 session_selector_.setMinimumHeight(h + 2 * margin);
 308
 309                 // Update the window title if there is no view left to
 310                 // generate focus change events
 311                 setWindowTitle(WindowTitle);
 312         }
 313 }
 314
 315 void MainWindow::setup_ui()
 316 {
 317         setObjectName(QString::fromUtf8("MainWindow"));
 318
 319         setCentralWidget(&session_selector_);
 320
 321         // Set the window icon
 322         QIcon icon;
 323         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 324         setWindowIcon(icon);
 325
 326         action_view_sticky_scrolling_->setCheckable(true);
 327         action_view_sticky_scrolling_->setChecked(true);
 328         action_view_sticky_scrolling_->setShortcut(QKeySequence(Qt::Key_S));
 329         action_view_sticky_scrolling_->setObjectName(
 330                 QString::fromUtf8("actionViewStickyScrolling"));
 331         action_view_sticky_scrolling_->setText(tr("&Sticky Scrolling"));
 332
 333         action_view_coloured_bg_->setCheckable(true);
 334         action_view_coloured_bg_->setChecked(true);
 335         action_view_coloured_bg_->setShortcut(QKeySequence(Qt::Key_B));
 336         action_view_coloured_bg_->setObjectName(
 337                 QString::fromUtf8("actionViewColouredBg"));
 338         action_view_coloured_bg_->setText(tr("Use &coloured backgrounds"));
 339
 340         action_about_->setObjectName(QString::fromUtf8("actionAbout"));
 341         action_about_->setText(tr("&About..."));
 342
 343         // Set up the tab area
 344         new_session_button_ = new QToolButton();
 345         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 346                 QIcon(":/icons/document-new.png")));
 347         new_session_button_->setAutoRaise(true);
 348
 349         run_stop_button_ = new QToolButton();
 350         run_stop_button_->setAutoRaise(true);
 351         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 352         run_stop_button_->setShortcut(QKeySequence(Qt::Key_Space));
 353
 354         settings_button_ = new QToolButton();
 355         settings_button_->setIcon(QIcon::fromTheme("configure",
 356                 QIcon(":/icons/configure.png")));
 357         settings_button_->setAutoRaise(true);
 358
 359         QFrame *separator1 = new QFrame();
 360         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 361         QFrame *separator2 = new QFrame();
 362         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 363
 364         QHBoxLayout* layout = new QHBoxLayout();
 365         layout->setContentsMargins(2, 2, 2, 2);
 366         layout->addWidget(new_session_button_);
 367         layout->addWidget(separator1);
 368         layout->addWidget(run_stop_button_);
 369         layout->addWidget(separator2);
 370         layout->addWidget(settings_button_);
 371
 372         static_tab_widget_ = new QWidget();
 373         static_tab_widget_->setLayout(layout);
 374
 375         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 376         session_selector_.setTabsClosable(true);
 377
 378         connect(new_session_button_, SIGNAL(clicked(bool)),
 379                 this, SLOT(on_new_session_clicked()));
 380         connect(run_stop_button_, SIGNAL(clicked(bool)),
 381                 this, SLOT(on_run_stop_clicked()));
 382         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 383                 this, SLOT(on_capture_state_changed(QObject*)));
 384
 385         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 386                 this, SLOT(on_tab_close_requested(int)));
 387         connect(&session_selector_, SIGNAL(currentChanged(int)),
 388                 this, SLOT(on_tab_changed(int)));
 389
 390
 391         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 392                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 393                 this, SLOT(on_focus_changed()));
 394 }
 395
 396 void MainWindow::save_ui_settings()
 397 {
 398         QSettings settings;
 399         int id = 0;
 400
 401         settings.beginGroup("MainWindow");
 402         settings.setValue("state", saveState());
 403         settings.setValue("geometry", saveGeometry());
 404         settings.endGroup();
 405
 406         for (shared_ptr<Session> session : sessions_) {
 407                 // Ignore sessions using the demo device or no device at all
 408                 if (session->device()) {
 409                         shared_ptr<devices::HardwareDevice> device =
 410                                 dynamic_pointer_cast< devices::HardwareDevice >
 411                                 (session->device());
 412
 413                         if (device &&
 414                                 device->hardware_device()->driver()->name() == "demo")
 415                                 continue;
 416
 417                         settings.beginGroup("Session" + QString::number(id++));
 418                         settings.remove("");  // Remove all keys in this group
 419                         session->save_settings(settings);
 420                         settings.endGroup();
 421                 }
 422         }
 423
 424         settings.setValue("sessions", id);
 425 }
 426
 427 void MainWindow::restore_ui_settings()
 428 {
 429         QSettings settings;
 430         int i, session_count;
 431
 432         settings.beginGroup("MainWindow");
 433
 434         if (settings.contains("geometry")) {
 435                 restoreGeometry(settings.value("geometry").toByteArray());
 436                 restoreState(settings.value("state").toByteArray());
 437         } else
 438                 resize(1000, 720);
 439
 440         settings.endGroup();
 441
 442         session_count = settings.value("sessions", 0).toInt();
 443
 444         for (i = 0; i < session_count; i++) {
 445                 settings.beginGroup("Session" + QString::number(i));
 446                 shared_ptr<Session> session = add_session();
 447                 session->restore_settings(settings);
 448                 settings.endGroup();
 449         }
 450 }
 451
 452 std::shared_ptr<Session> MainWindow::get_tab_session(int index) const
 453 {
 454         // Find the session that belongs to the tab's main window
 455         for (auto entry : session_windows_)
 456                 if (entry.second == session_selector_.widget(index))
 457                         return entry.first;
 458
 459         return nullptr;
 460 }
 461
 462 void MainWindow::closeEvent(QCloseEvent *event)
 463 {
 464         save_ui_settings();
 465         event->accept();
 466 }
 467
 468 QMenu* MainWindow::createPopupMenu()
 469 {
 470         return nullptr;
 471 }
 472
 473 bool MainWindow::restoreState(const QByteArray &state, int version)
 474 {
 475         (void)state;
 476         (void)version;
 477
 478         // Do nothing. We don't want Qt to handle this, or else it
 479         // will try to restore all the dock widgets and create havoc.
 480
 481         return false;
 482 }
 483
 484 void MainWindow::session_error(const QString text, const QString info_text)
 485 {
 486         QMetaObject::invokeMethod(this, "show_session_error",
 487                 Qt::QueuedConnection, Q_ARG(QString, text),
 488                 Q_ARG(QString, info_text));
 489 }
 490
 491 void MainWindow::show_session_error(const QString text, const QString info_text)
 492 {
 493         QMessageBox msg(this);
 494         msg.setText(text);
 495         msg.setInformativeText(info_text);
 496         msg.setStandardButtons(QMessageBox::Ok);
 497         msg.setIcon(QMessageBox::Warning);
 498         msg.exec();
 499 }
 500
 501 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 502         Session *session)
 503 {
 504         // We get a pointer and need a reference
 505         for (std::shared_ptr<Session> s : sessions_)
 506                 if (s.get() == session)
 507                         add_view(title, type, *s);
 508 }
 509
 510 void MainWindow::on_focus_changed()
 511 {
 512         shared_ptr<views::ViewBase> view = get_active_view();
 513
 514         if (view) {
 515                 for (shared_ptr<Session> session : sessions_) {
 516                         if (session->has_view(view)) {
 517                                 if (session != last_focused_session_) {
 518                                         // Activate correct tab if necessary
 519                                         shared_ptr<Session> tab_session = get_tab_session(
 520                                                 session_selector_.currentIndex());
 521                                         if (tab_session != session)
 522                                                 session_selector_.setCurrentWidget(
 523                                                         session_windows_.at(session));
 524
 525                                         on_focused_session_changed(session);
 526                                 }
 527
 528                                 break;
 529                         }
 530                 }
 531         }
 532
 533         if (sessions_.empty())
 534                 setWindowTitle(WindowTitle);
 535 }
 536
 537 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 538 {
 539         last_focused_session_ = session;
 540
 541         setWindowTitle(session->name() + " - " + WindowTitle);
 542
 543         // Update the state of the run/stop button, too
 544         on_capture_state_changed(session.get());
 545 }
 546
 547 void MainWindow::on_new_session_clicked()
 548 {
 549         add_session();
 550 }
 551
 552 void MainWindow::on_run_stop_clicked()
 553 {
 554         shared_ptr<Session> session = last_focused_session_;
 555
 556         if (!session)
 557                 return;
 558
 559         switch (session->get_capture_state()) {
 560         case Session::Stopped:
 561                 session->start_capture([&](QString message) {
 562                         session_error("Capture failed", message); });
 563                 break;
 564         case Session::AwaitingTrigger:
 565         case Session::Running:
 566                 session->stop_capture();
 567                 break;
 568         }
 569 }
 570
 571 void MainWindow::on_session_name_changed()
 572 {
 573         // Update the corresponding dock widget's name(s)
 574         Session *session = qobject_cast<Session*>(QObject::sender());
 575         assert(session);
 576
 577         for (shared_ptr<views::ViewBase> view : session->views()) {
 578                 // Get the dock that contains the view
 579                 for (auto entry : view_docks_)
 580                         if (entry.second == view) {
 581                                 entry.first->setObjectName(session->name());
 582                                 entry.first->setWindowTitle(session->name());
 583                         }
 584         }
 585
 586         // Update the tab widget by finding the main window and the tab from that
 587         for (auto entry : session_windows_)
 588                 if (entry.first.get() == session) {
 589                         QMainWindow *window = entry.second;
 590                         const int index = session_selector_.indexOf(window);
 591                         session_selector_.setTabText(index, session->name());
 592                 }
 593
 594         // Refresh window title if the affected session has focus
 595         if (session == last_focused_session_.get())
 596                 setWindowTitle(session->name() + " - " + WindowTitle);
 597 }
 598
 599 void MainWindow::on_capture_state_changed(QObject *obj)
 600 {
 601         Session *caller = qobject_cast<Session*>(obj);
 602
 603         // Ignore if caller is not the currently focused session
 604         // unless there is only one session
 605         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 606                 return;
 607
 608         int state = caller->get_capture_state();
 609
 610         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 611         run_stop_button_->setIcon(*icons[state]);
 612         run_stop_button_->setText((state == pv::Session::Stopped) ?
 613                 tr("Run") : tr("Stop"));
 614 }
 615
 616 void MainWindow::on_new_view(Session *session)
 617 {
 618         // We get a pointer and need a reference
 619         for (std::shared_ptr<Session> s : sessions_)
 620                 if (s.get() == session)
 621                         add_view(session->name(), views::ViewTypeTrace, *s);
 622 }
 623
 624 void MainWindow::on_view_close_clicked()
 625 {
 626         // Find the dock widget that contains the close button that was clicked
 627         QObject *w = QObject::sender();
 628         QDockWidget *dock = 0;
 629
 630         while (w) {
 631             dock = qobject_cast<QDockWidget*>(w);
 632             if (dock)
 633                 break;
 634             w = w->parent();
 635         }
 636
 637         // Get the view contained in the dock widget
 638         shared_ptr<views::ViewBase> view;
 639
 640         for (auto entry : view_docks_)
 641                 if (entry.first == dock)
 642                         view = entry.second;
 643
 644         // Deregister the view
 645         for (shared_ptr<Session> session : sessions_) {
 646                 if (!session->has_view(view))
 647                         continue;
 648
 649                 // Also destroy the entire session if its main view is closing
 650                 if (view == session->main_view()) {
 651                         remove_session(session);
 652                         break;
 653                 } else
 654                         session->deregister_view(view);
 655         }
 656 }
 657
 658 void MainWindow::on_tab_changed(int index)
 659 {
 660         shared_ptr<Session> session = get_tab_session(index);
 661
 662         if (session)
 663                 on_focused_session_changed(session);
 664 }
 665
 666 void MainWindow::on_tab_close_requested(int index)
 667 {
 668         // TODO Ask user if this is intended in case data is unsaved
 669
 670         shared_ptr<Session> session = get_tab_session(index);
 671
 672         if (session)
 673                 remove_session(session);
 674 }
 675
 676 void MainWindow::on_actionViewStickyScrolling_triggered()
 677 {
 678         shared_ptr<views::ViewBase> viewbase = get_active_view();
 679         views::TraceView::View* view =
 680                 qobject_cast<views::TraceView::View*>(viewbase.get());
 681         if (view)
 682                 view->enable_sticky_scrolling(action_view_sticky_scrolling_->isChecked());
 683 }
 684
 685 void MainWindow::on_actionViewColouredBg_triggered()
 686 {
 687         shared_ptr<views::ViewBase> viewbase = get_active_view();
 688         views::TraceView::View* view =
 689                         qobject_cast<views::TraceView::View*>(viewbase.get());
 690         if (view)
 691                 view->enable_coloured_bg(action_view_coloured_bg_->isChecked());
 692 }
 693
 694 void MainWindow::on_actionAbout_triggered()
 695 {
 696         dialogs::About dlg(device_manager_.context(), this);
 697         dlg.exec();
 698 }
 699
 700 } // namespace pv