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 = nullptr;
 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
 216                                 main_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 217                         } else {
 218                                 /* Additional view, create a standard bar */
 219                                 pv::views::trace::StandardBar *standard_bar =
 220                                         new pv::views::trace::StandardBar(session, this, v.get());
 221                                 dock_main->addToolBar(standard_bar);
 222
 223                                 standard_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 224                         }
 225                 }
 226
 227                 return v;
 228         }
 229
 230         return nullptr;
 231 }
 232
 233 shared_ptr<Session> MainWindow::add_session()
 234 {
 235         static int last_session_id = 1;
 236         QString name = tr("Untitled-%1").arg(last_session_id++);
 237
 238         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 239
 240         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 241                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 242         connect(session.get(), SIGNAL(name_changed()),
 243                 this, SLOT(on_session_name_changed()));
 244         session_state_mapper_.setMapping(session.get(), session.get());
 245         connect(session.get(), SIGNAL(capture_state_changed(int)),
 246                 &session_state_mapper_, SLOT(map()));
 247
 248         sessions_.push_back(session);
 249
 250         QMainWindow *window = new QMainWindow();
 251         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 252         session_windows_[session] = window;
 253
 254         int index = session_selector_.addTab(window, name);
 255         session_selector_.setCurrentIndex(index);
 256         last_focused_session_ = session;
 257
 258         window->setDockNestingEnabled(true);
 259
 260         shared_ptr<views::ViewBase> main_view =
 261                 add_view(name, views::ViewTypeTrace, *session);
 262
 263         return session;
 264 }
 265
 266 void MainWindow::remove_session(shared_ptr<Session> session)
 267 {
 268         int h = new_session_button_->height();
 269
 270         for (shared_ptr<views::ViewBase> view : session->views()) {
 271                 // Find the dock the view is contained in and remove it
 272                 for (auto entry : view_docks_)
 273                         if (entry.second == view) {
 274                                 // Remove the view from the session
 275                                 session->deregister_view(view);
 276
 277                                 // Remove the view from its parent; otherwise, Qt will
 278                                 // call deleteLater() on it, which causes a double free
 279                                 // since the shared_ptr in view_docks_ doesn't know
 280                                 // that Qt keeps a pointer to the view around
 281                                 entry.second->setParent(0);
 282
 283                                 // Remove this entry from the container and stop iterating.
 284                                 view_docks_.erase(entry.first);
 285                                 break;
 286                         }
 287         }
 288
 289         QMainWindow *window = session_windows_.at(session);
 290         session_selector_.removeTab(session_selector_.indexOf(window));
 291
 292         session_windows_.erase(session);
 293
 294         if (last_focused_session_ == session)
 295                 last_focused_session_.reset();
 296
 297         sessions_.remove_if([&](shared_ptr<Session> s) {
 298                 return s == session; });
 299
 300         if (sessions_.empty()) {
 301                 // When there are no more tabs, the height of the QTabWidget
 302                 // drops to zero. We must prevent this to keep the static
 303                 // widgets visible
 304                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 305                         w->setMinimumHeight(h);
 306
 307                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 308                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 309                 session_selector_.setMinimumHeight(h + 2 * margin);
 310
 311                 // Update the window title if there is no view left to
 312                 // generate focus change events
 313                 setWindowTitle(WindowTitle);
 314         }
 315 }
 316
 317 void MainWindow::setup_ui()
 318 {
 319         setObjectName(QString::fromUtf8("MainWindow"));
 320
 321         setCentralWidget(&session_selector_);
 322
 323         // Set the window icon
 324         QIcon icon;
 325         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 326         setWindowIcon(icon);
 327
 328         action_view_sticky_scrolling_->setCheckable(true);
 329         action_view_sticky_scrolling_->setChecked(true);
 330         action_view_sticky_scrolling_->setShortcut(QKeySequence(Qt::Key_S));
 331         action_view_sticky_scrolling_->setObjectName(
 332                 QString::fromUtf8("actionViewStickyScrolling"));
 333         action_view_sticky_scrolling_->setText(tr("&Sticky Scrolling"));
 334
 335         action_view_coloured_bg_->setCheckable(true);
 336         action_view_coloured_bg_->setChecked(true);
 337         action_view_coloured_bg_->setShortcut(QKeySequence(Qt::Key_B));
 338         action_view_coloured_bg_->setObjectName(
 339                 QString::fromUtf8("actionViewColouredBg"));
 340         action_view_coloured_bg_->setText(tr("Use &Coloured Backgrounds"));
 341
 342         action_about_->setObjectName(QString::fromUtf8("actionAbout"));
 343         action_about_->setToolTip(tr("&About..."));
 344
 345         // Set up the tab area
 346         new_session_button_ = new QToolButton();
 347         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 348                 QIcon(":/icons/document-new.png")));
 349         new_session_button_->setToolTip(tr("Create New Session"));
 350         new_session_button_->setAutoRaise(true);
 351
 352         run_stop_button_ = new QToolButton();
 353         run_stop_button_->setAutoRaise(true);
 354         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 355         run_stop_button_->setShortcut(QKeySequence(Qt::Key_Space));
 356         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 357
 358         settings_button_ = new QToolButton();
 359         settings_button_->setIcon(QIcon::fromTheme("configure",
 360                 QIcon(":/icons/configure.png")));
 361         settings_button_->setToolTip(tr("Settings"));
 362         settings_button_->setAutoRaise(true);
 363
 364         QFrame *separator1 = new QFrame();
 365         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 366         QFrame *separator2 = new QFrame();
 367         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 368
 369         QHBoxLayout* layout = new QHBoxLayout();
 370         layout->setContentsMargins(2, 2, 2, 2);
 371         layout->addWidget(new_session_button_);
 372         layout->addWidget(separator1);
 373         layout->addWidget(run_stop_button_);
 374         layout->addWidget(separator2);
 375         layout->addWidget(settings_button_);
 376
 377         static_tab_widget_ = new QWidget();
 378         static_tab_widget_->setLayout(layout);
 379
 380         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 381         session_selector_.setTabsClosable(true);
 382
 383         connect(new_session_button_, SIGNAL(clicked(bool)),
 384                 this, SLOT(on_new_session_clicked()));
 385         connect(run_stop_button_, SIGNAL(clicked(bool)),
 386                 this, SLOT(on_run_stop_clicked()));
 387         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 388                 this, SLOT(on_capture_state_changed(QObject*)));
 389
 390         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 391                 this, SLOT(on_tab_close_requested(int)));
 392         connect(&session_selector_, SIGNAL(currentChanged(int)),
 393                 this, SLOT(on_tab_changed(int)));
 394
 395
 396         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 397                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 398                 this, SLOT(on_focus_changed()));
 399 }
 400
 401 void MainWindow::save_ui_settings()
 402 {
 403         QSettings settings;
 404         int id = 0;
 405
 406         settings.beginGroup("MainWindow");
 407         settings.setValue("state", saveState());
 408         settings.setValue("geometry", saveGeometry());
 409         settings.endGroup();
 410
 411         for (shared_ptr<Session> session : sessions_) {
 412                 // Ignore sessions using the demo device or no device at all
 413                 if (session->device()) {
 414                         shared_ptr<devices::HardwareDevice> device =
 415                                 dynamic_pointer_cast< devices::HardwareDevice >
 416                                 (session->device());
 417
 418                         if (device &&
 419                                 device->hardware_device()->driver()->name() == "demo")
 420                                 continue;
 421
 422                         settings.beginGroup("Session" + QString::number(id++));
 423                         settings.remove("");  // Remove all keys in this group
 424                         session->save_settings(settings);
 425                         settings.endGroup();
 426                 }
 427         }
 428
 429         settings.setValue("sessions", id);
 430 }
 431
 432 void MainWindow::restore_ui_settings()
 433 {
 434         QSettings settings;
 435         int i, session_count;
 436
 437         settings.beginGroup("MainWindow");
 438
 439         if (settings.contains("geometry")) {
 440                 restoreGeometry(settings.value("geometry").toByteArray());
 441                 restoreState(settings.value("state").toByteArray());
 442         } else
 443                 resize(1000, 720);
 444
 445         settings.endGroup();
 446
 447         session_count = settings.value("sessions", 0).toInt();
 448
 449         for (i = 0; i < session_count; i++) {
 450                 settings.beginGroup("Session" + QString::number(i));
 451                 shared_ptr<Session> session = add_session();
 452                 session->restore_settings(settings);
 453                 settings.endGroup();
 454         }
 455 }
 456
 457 std::shared_ptr<Session> MainWindow::get_tab_session(int index) const
 458 {
 459         // Find the session that belongs to the tab's main window
 460         for (auto entry : session_windows_)
 461                 if (entry.second == session_selector_.widget(index))
 462                         return entry.first;
 463
 464         return nullptr;
 465 }
 466
 467 void MainWindow::closeEvent(QCloseEvent *event)
 468 {
 469         save_ui_settings();
 470         event->accept();
 471 }
 472
 473 QMenu* MainWindow::createPopupMenu()
 474 {
 475         return nullptr;
 476 }
 477
 478 bool MainWindow::restoreState(const QByteArray &state, int version)
 479 {
 480         (void)state;
 481         (void)version;
 482
 483         // Do nothing. We don't want Qt to handle this, or else it
 484         // will try to restore all the dock widgets and create havoc.
 485
 486         return false;
 487 }
 488
 489 void MainWindow::session_error(const QString text, const QString info_text)
 490 {
 491         QMetaObject::invokeMethod(this, "show_session_error",
 492                 Qt::QueuedConnection, Q_ARG(QString, text),
 493                 Q_ARG(QString, info_text));
 494 }
 495
 496 void MainWindow::show_session_error(const QString text, const QString info_text)
 497 {
 498         QMessageBox msg(this);
 499         msg.setText(text);
 500         msg.setInformativeText(info_text);
 501         msg.setStandardButtons(QMessageBox::Ok);
 502         msg.setIcon(QMessageBox::Warning);
 503         msg.exec();
 504 }
 505
 506 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 507         Session *session)
 508 {
 509         // We get a pointer and need a reference
 510         for (std::shared_ptr<Session> s : sessions_)
 511                 if (s.get() == session)
 512                         add_view(title, type, *s);
 513 }
 514
 515 void MainWindow::on_focus_changed()
 516 {
 517         shared_ptr<views::ViewBase> view = get_active_view();
 518
 519         if (view) {
 520                 for (shared_ptr<Session> session : sessions_) {
 521                         if (session->has_view(view)) {
 522                                 if (session != last_focused_session_) {
 523                                         // Activate correct tab if necessary
 524                                         shared_ptr<Session> tab_session = get_tab_session(
 525                                                 session_selector_.currentIndex());
 526                                         if (tab_session != session)
 527                                                 session_selector_.setCurrentWidget(
 528                                                         session_windows_.at(session));
 529
 530                                         on_focused_session_changed(session);
 531                                 }
 532
 533                                 break;
 534                         }
 535                 }
 536         }
 537
 538         if (sessions_.empty())
 539                 setWindowTitle(WindowTitle);
 540 }
 541
 542 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 543 {
 544         last_focused_session_ = session;
 545
 546         setWindowTitle(session->name() + " - " + WindowTitle);
 547
 548         // Update the state of the run/stop button, too
 549         on_capture_state_changed(session.get());
 550 }
 551
 552 void MainWindow::on_new_session_clicked()
 553 {
 554         add_session();
 555 }
 556
 557 void MainWindow::on_run_stop_clicked()
 558 {
 559         shared_ptr<Session> session = last_focused_session_;
 560
 561         if (!session)
 562                 return;
 563
 564         switch (session->get_capture_state()) {
 565         case Session::Stopped:
 566                 session->start_capture([&](QString message) {
 567                         session_error("Capture failed", message); });
 568                 break;
 569         case Session::AwaitingTrigger:
 570         case Session::Running:
 571                 session->stop_capture();
 572                 break;
 573         }
 574 }
 575
 576 void MainWindow::on_session_name_changed()
 577 {
 578         // Update the corresponding dock widget's name(s)
 579         Session *session = qobject_cast<Session*>(QObject::sender());
 580         assert(session);
 581
 582         for (shared_ptr<views::ViewBase> view : session->views()) {
 583                 // Get the dock that contains the view
 584                 for (auto entry : view_docks_)
 585                         if (entry.second == view) {
 586                                 entry.first->setObjectName(session->name());
 587                                 entry.first->setWindowTitle(session->name());
 588                         }
 589         }
 590
 591         // Update the tab widget by finding the main window and the tab from that
 592         for (auto entry : session_windows_)
 593                 if (entry.first.get() == session) {
 594                         QMainWindow *window = entry.second;
 595                         const int index = session_selector_.indexOf(window);
 596                         session_selector_.setTabText(index, session->name());
 597                 }
 598
 599         // Refresh window title if the affected session has focus
 600         if (session == last_focused_session_.get())
 601                 setWindowTitle(session->name() + " - " + WindowTitle);
 602 }
 603
 604 void MainWindow::on_capture_state_changed(QObject *obj)
 605 {
 606         Session *caller = qobject_cast<Session*>(obj);
 607
 608         // Ignore if caller is not the currently focused session
 609         // unless there is only one session
 610         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 611                 return;
 612
 613         int state = caller->get_capture_state();
 614
 615         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 616         run_stop_button_->setIcon(*icons[state]);
 617         run_stop_button_->setText((state == pv::Session::Stopped) ?
 618                 tr("Run") : tr("Stop"));
 619 }
 620
 621 void MainWindow::on_new_view(Session *session)
 622 {
 623         // We get a pointer and need a reference
 624         for (std::shared_ptr<Session> s : sessions_)
 625                 if (s.get() == session)
 626                         add_view(session->name(), views::ViewTypeTrace, *s);
 627 }
 628
 629 void MainWindow::on_view_close_clicked()
 630 {
 631         // Find the dock widget that contains the close button that was clicked
 632         QObject *w = QObject::sender();
 633         QDockWidget *dock = 0;
 634
 635         while (w) {
 636             dock = qobject_cast<QDockWidget*>(w);
 637             if (dock)
 638                 break;
 639             w = w->parent();
 640         }
 641
 642         // Get the view contained in the dock widget
 643         shared_ptr<views::ViewBase> view;
 644
 645         for (auto entry : view_docks_)
 646                 if (entry.first == dock)
 647                         view = entry.second;
 648
 649         // Deregister the view
 650         for (shared_ptr<Session> session : sessions_) {
 651                 if (!session->has_view(view))
 652                         continue;
 653
 654                 // Also destroy the entire session if its main view is closing
 655                 if (view == session->main_view()) {
 656                         remove_session(session);
 657                         break;
 658                 } else
 659                         session->deregister_view(view);
 660         }
 661 }
 662
 663 void MainWindow::on_tab_changed(int index)
 664 {
 665         shared_ptr<Session> session = get_tab_session(index);
 666
 667         if (session)
 668                 on_focused_session_changed(session);
 669 }
 670
 671 void MainWindow::on_tab_close_requested(int index)
 672 {
 673         // TODO Ask user if this is intended in case data is unsaved
 674
 675         shared_ptr<Session> session = get_tab_session(index);
 676
 677         if (session)
 678                 remove_session(session);
 679 }
 680
 681 void MainWindow::on_actionViewStickyScrolling_triggered()
 682 {
 683         shared_ptr<views::ViewBase> viewbase = get_active_view();
 684         views::TraceView::View* view =
 685                 qobject_cast<views::TraceView::View*>(viewbase.get());
 686         if (view)
 687                 view->enable_sticky_scrolling(action_view_sticky_scrolling_->isChecked());
 688 }
 689
 690 void MainWindow::on_actionViewColouredBg_triggered()
 691 {
 692         shared_ptr<views::ViewBase> viewbase = get_active_view();
 693         views::TraceView::View* view =
 694                         qobject_cast<views::TraceView::View*>(viewbase.get());
 695         if (view)
 696                 view->enable_coloured_bg(action_view_coloured_bg_->isChecked());
 697 }
 698
 699 void MainWindow::on_actionAbout_triggered()
 700 {
 701         dialogs::About dlg(device_manager_.context(), this);
 702         dlg.exec();
 703 }
 704
 705 } // namespace pv