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, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #include <cassert>
  21
  22 #ifdef ENABLE_DECODE
  23 #include <libsigrokdecode/libsigrokdecode.h>
  24 #endif
  25
  26 #include <algorithm>
  27 #include <iterator>
  28
  29 #include <QAction>
  30 #include <QApplication>
  31 #include <QCloseEvent>
  32 #include <QDockWidget>
  33 #include <QHBoxLayout>
  34 #include <QMessageBox>
  35 #include <QSettings>
  36 #include <QWidget>
  37
  38 #include "mainwindow.hpp"
  39
  40 #include "devicemanager.hpp"
  41 #include "util.hpp"
  42 #include "devices/hardwaredevice.hpp"
  43 #include "dialogs/about.hpp"
  44 #include "toolbars/mainbar.hpp"
  45 #include "view/view.hpp"
  46 #include "views/trace/standardbar.hpp"
  47
  48 #include <stdint.h>
  49 #include <stdarg.h>
  50 #include <libsigrokcxx/libsigrokcxx.hpp>
  51
  52 using std::dynamic_pointer_cast;
  53 using std::list;
  54 using std::make_shared;
  55 using std::map;
  56 using std::shared_ptr;
  57 using std::string;
  58
  59 namespace pv {
  60
  61 namespace view {
  62 class ViewItem;
  63 }
  64
  65 using toolbars::MainBar;
  66
  67 const QString MainWindow::WindowTitle = tr("PulseView");
  68
  69 MainWindow::MainWindow(DeviceManager &device_manager,
  70         string open_file_name, string open_file_format,
  71         QWidget *parent) :
  72         QMainWindow(parent),
  73         device_manager_(device_manager),
  74         session_selector_(this),
  75         session_state_mapper_(this),
  76         action_view_sticky_scrolling_(new QAction(this)),
  77         action_view_coloured_bg_(new QAction(this)),
  78         action_about_(new QAction(this)),
  79         icon_red_(":/icons/status-red.svg"),
  80         icon_green_(":/icons/status-green.svg"),
  81         icon_grey_(":/icons/status-grey.svg")
  82 {
  83         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  84
  85         setup_ui();
  86         restore_ui_settings();
  87
  88         if (!open_file_name.empty()) {
  89                 shared_ptr<Session> session = add_session();
  90                 session->load_init_file(open_file_name, open_file_format);
  91         }
  92
  93         // Add empty default session if there aren't any sessions
  94         if (sessions_.size() == 0) {
  95                 shared_ptr<Session> session = add_session();
  96
  97                 map<string, string> dev_info;
  98                 shared_ptr<devices::HardwareDevice> other_device, demo_device;
  99
 100                 // Use any available device that's not demo
 101                 for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
 102                         if (dev->hardware_device()->driver()->name() == "demo") {
 103                                 demo_device = dev;
 104                         } else {
 105                                 other_device = dev;
 106                         }
 107                 }
 108
 109                 // ...and if there isn't any, just use demo then
 110                 session->select_device(other_device ? other_device : demo_device);
 111         }
 112 }
 113
 114 MainWindow::~MainWindow()
 115 {
 116         while (!sessions_.empty())
 117                 remove_session(sessions_.front());
 118 }
 119
 120 QAction* MainWindow::action_view_sticky_scrolling() const
 121 {
 122         return action_view_sticky_scrolling_;
 123 }
 124
 125 QAction* MainWindow::action_view_coloured_bg() const
 126 {
 127         return action_view_coloured_bg_;
 128 }
 129
 130 QAction* MainWindow::action_about() const
 131 {
 132         return action_about_;
 133 }
 134
 135 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 136 {
 137         // If there's only one view, use it...
 138         if (view_docks_.size() == 1)
 139                 return view_docks_.begin()->second;
 140
 141         // ...otherwise find the dock widget the widget with focus is contained in
 142         QObject *w = QApplication::focusWidget();
 143         QDockWidget *dock = 0;
 144
 145         while (w) {
 146             dock = qobject_cast<QDockWidget*>(w);
 147             if (dock)
 148                 break;
 149             w = w->parent();
 150         }
 151
 152         // Get the view contained in the dock widget
 153         for (auto entry : view_docks_)
 154                 if (entry.first == dock)
 155                         return entry.second;
 156
 157         return nullptr;
 158 }
 159
 160 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 161         views::ViewType type, Session &session)
 162 {
 163         QMainWindow *main_window = nullptr;
 164         for (auto entry : session_windows_)
 165                 if (entry.first.get() == &session)
 166                         main_window = entry.second;
 167
 168         assert(main_window);
 169
 170         if (type == views::ViewTypeTrace) {
 171                 QDockWidget* dock = new QDockWidget(title, main_window);
 172                 dock->setObjectName(title);
 173                 main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 174
 175                 // Insert a QMainWindow into the dock widget to allow for a tool bar
 176                 QMainWindow *dock_main = new QMainWindow(dock);
 177                 dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 178
 179                 shared_ptr<views::TraceView::View> v =
 180                         make_shared<views::TraceView::View>(session, dock_main);
 181                 view_docks_[dock] = v;
 182                 session.register_view(v);
 183
 184                 dock_main->setCentralWidget(v.get());
 185                 dock->setWidget(dock_main);
 186
 187                 dock->setFeatures(QDockWidget::DockWidgetMovable |
 188                         QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 189
 190                 QAbstractButton *close_btn =
 191                         dock->findChildren<QAbstractButton*>
 192                                 ("qt_dockwidget_closebutton").front();
 193
 194                 connect(close_btn, SIGNAL(clicked(bool)),
 195                         this, SLOT(on_view_close_clicked()));
 196
 197                 if (type == views::ViewTypeTrace) {
 198                         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 199                                 qobject_cast<views::ViewBase*>(v.get()),
 200                                 SLOT(trigger_event(util::Timestamp)));
 201
 202                         v->enable_sticky_scrolling(action_view_sticky_scrolling_->isChecked());
 203                         v->enable_coloured_bg(action_view_coloured_bg_->isChecked());
 204
 205                         shared_ptr<MainBar> main_bar = session.main_bar();
 206                         if (!main_bar) {
 207                                 /* Initial view, create the main bar */
 208                                 main_bar = make_shared<MainBar>(session, this, v.get());
 209                                 dock_main->addToolBar(main_bar.get());
 210                                 session.set_main_bar(main_bar);
 211
 212                                 connect(main_bar.get(), SIGNAL(new_view(Session*)),
 213                                         this, SLOT(on_new_view(Session*)));
 214
 215                                 main_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 216                         } else {
 217                                 /* Additional view, create a standard bar */
 218                                 pv::views::trace::StandardBar *standard_bar =
 219                                         new pv::views::trace::StandardBar(session, this, v.get());
 220                                 dock_main->addToolBar(standard_bar);
 221
 222                                 standard_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 223                         }
 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 and stop iterating.
 283                                 view_docks_.erase(entry.first);
 284                                 break;
 285                         }
 286         }
 287
 288         QMainWindow *window = session_windows_.at(session);
 289         session_selector_.removeTab(session_selector_.indexOf(window));
 290
 291         session_windows_.erase(session);
 292
 293         if (last_focused_session_ == session)
 294                 last_focused_session_.reset();
 295
 296         sessions_.remove_if([&](shared_ptr<Session> s) {
 297                 return s == session; });
 298
 299         if (sessions_.empty()) {
 300                 // When there are no more tabs, the height of the QTabWidget
 301                 // drops to zero. We must prevent this to keep the static
 302                 // widgets visible
 303                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 304                         w->setMinimumHeight(h);
 305
 306                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 307                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 308                 session_selector_.setMinimumHeight(h + 2 * margin);
 309
 310                 // Update the window title if there is no view left to
 311                 // generate focus change events
 312                 setWindowTitle(WindowTitle);
 313         }
 314 }
 315
 316 void MainWindow::setup_ui()
 317 {
 318         setObjectName(QString::fromUtf8("MainWindow"));
 319
 320         setCentralWidget(&session_selector_);
 321
 322         // Set the window icon
 323         QIcon icon;
 324         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 325         setWindowIcon(icon);
 326
 327         action_view_sticky_scrolling_->setCheckable(true);
 328         action_view_sticky_scrolling_->setChecked(true);
 329         action_view_sticky_scrolling_->setShortcut(QKeySequence(Qt::Key_S));
 330         action_view_sticky_scrolling_->setObjectName(
 331                 QString::fromUtf8("actionViewStickyScrolling"));
 332         action_view_sticky_scrolling_->setText(tr("&Sticky Scrolling"));
 333
 334         action_view_coloured_bg_->setCheckable(true);
 335         action_view_coloured_bg_->setChecked(true);
 336         action_view_coloured_bg_->setShortcut(QKeySequence(Qt::Key_B));
 337         action_view_coloured_bg_->setObjectName(
 338                 QString::fromUtf8("actionViewColouredBg"));
 339         action_view_coloured_bg_->setText(tr("Use &Coloured Backgrounds"));
 340
 341         action_about_->setObjectName(QString::fromUtf8("actionAbout"));
 342         action_about_->setToolTip(tr("&About..."));
 343
 344         // Set up the tab area
 345         new_session_button_ = new QToolButton();
 346         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 347                 QIcon(":/icons/document-new.png")));
 348         new_session_button_->setToolTip(tr("Create New Session"));
 349         new_session_button_->setAutoRaise(true);
 350
 351         run_stop_button_ = new QToolButton();
 352         run_stop_button_->setAutoRaise(true);
 353         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 354         run_stop_button_->setShortcut(QKeySequence(Qt::Key_Space));
 355         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 356
 357         settings_button_ = new QToolButton();
 358         settings_button_->setIcon(QIcon::fromTheme("configure",
 359                 QIcon(":/icons/configure.png")));
 360         settings_button_->setToolTip(tr("Settings"));
 361         settings_button_->setAutoRaise(true);
 362
 363         QFrame *separator1 = new QFrame();
 364         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 365         QFrame *separator2 = new QFrame();
 366         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 367
 368         QHBoxLayout* layout = new QHBoxLayout();
 369         layout->setContentsMargins(2, 2, 2, 2);
 370         layout->addWidget(new_session_button_);
 371         layout->addWidget(separator1);
 372         layout->addWidget(run_stop_button_);
 373         layout->addWidget(separator2);
 374         layout->addWidget(settings_button_);
 375
 376         static_tab_widget_ = new QWidget();
 377         static_tab_widget_->setLayout(layout);
 378
 379         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 380         session_selector_.setTabsClosable(true);
 381
 382         connect(new_session_button_, SIGNAL(clicked(bool)),
 383                 this, SLOT(on_new_session_clicked()));
 384         connect(run_stop_button_, SIGNAL(clicked(bool)),
 385                 this, SLOT(on_run_stop_clicked()));
 386         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 387                 this, SLOT(on_capture_state_changed(QObject*)));
 388
 389         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 390                 this, SLOT(on_tab_close_requested(int)));
 391         connect(&session_selector_, SIGNAL(currentChanged(int)),
 392                 this, SLOT(on_tab_changed(int)));
 393
 394
 395         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 396                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 397                 this, SLOT(on_focus_changed()));
 398 }
 399
 400 void MainWindow::save_ui_settings()
 401 {
 402         QSettings settings;
 403         int id = 0;
 404
 405         settings.beginGroup("MainWindow");
 406         settings.setValue("state", saveState());
 407         settings.setValue("geometry", saveGeometry());
 408         settings.endGroup();
 409
 410         for (shared_ptr<Session> session : sessions_) {
 411                 // Ignore sessions using the demo device or no device at all
 412                 if (session->device()) {
 413                         shared_ptr<devices::HardwareDevice> device =
 414                                 dynamic_pointer_cast< devices::HardwareDevice >
 415                                 (session->device());
 416
 417                         if (device &&
 418                                 device->hardware_device()->driver()->name() == "demo")
 419                                 continue;
 420
 421                         settings.beginGroup("Session" + QString::number(id++));
 422                         settings.remove("");  // Remove all keys in this group
 423                         session->save_settings(settings);
 424                         settings.endGroup();
 425                 }
 426         }
 427
 428         settings.setValue("sessions", id);
 429 }
 430
 431 void MainWindow::restore_ui_settings()
 432 {
 433         QSettings settings;
 434         int i, session_count;
 435
 436         settings.beginGroup("MainWindow");
 437
 438         if (settings.contains("geometry")) {
 439                 restoreGeometry(settings.value("geometry").toByteArray());
 440                 restoreState(settings.value("state").toByteArray());
 441         } else
 442                 resize(1000, 720);
 443
 444         settings.endGroup();
 445
 446         session_count = settings.value("sessions", 0).toInt();
 447
 448         for (i = 0; i < session_count; i++) {
 449                 settings.beginGroup("Session" + QString::number(i));
 450                 shared_ptr<Session> session = add_session();
 451                 session->restore_settings(settings);
 452                 settings.endGroup();
 453         }
 454 }
 455
 456 std::shared_ptr<Session> MainWindow::get_tab_session(int index) const
 457 {
 458         // Find the session that belongs to the tab's main window
 459         for (auto entry : session_windows_)
 460                 if (entry.second == session_selector_.widget(index))
 461                         return entry.first;
 462
 463         return nullptr;
 464 }
 465
 466 void MainWindow::closeEvent(QCloseEvent *event)
 467 {
 468         save_ui_settings();
 469         event->accept();
 470 }
 471
 472 QMenu* MainWindow::createPopupMenu()
 473 {
 474         return nullptr;
 475 }
 476
 477 bool MainWindow::restoreState(const QByteArray &state, int version)
 478 {
 479         (void)state;
 480         (void)version;
 481
 482         // Do nothing. We don't want Qt to handle this, or else it
 483         // will try to restore all the dock widgets and create havoc.
 484
 485         return false;
 486 }
 487
 488 void MainWindow::session_error(const QString text, const QString info_text)
 489 {
 490         QMetaObject::invokeMethod(this, "show_session_error",
 491                 Qt::QueuedConnection, Q_ARG(QString, text),
 492                 Q_ARG(QString, info_text));
 493 }
 494
 495 void MainWindow::show_session_error(const QString text, const QString info_text)
 496 {
 497         QMessageBox msg(this);
 498         msg.setText(text);
 499         msg.setInformativeText(info_text);
 500         msg.setStandardButtons(QMessageBox::Ok);
 501         msg.setIcon(QMessageBox::Warning);
 502         msg.exec();
 503 }
 504
 505 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 506         Session *session)
 507 {
 508         // We get a pointer and need a reference
 509         for (std::shared_ptr<Session> s : sessions_)
 510                 if (s.get() == session)
 511                         add_view(title, type, *s);
 512 }
 513
 514 void MainWindow::on_focus_changed()
 515 {
 516         shared_ptr<views::ViewBase> view = get_active_view();
 517
 518         if (view) {
 519                 for (shared_ptr<Session> session : sessions_) {
 520                         if (session->has_view(view)) {
 521                                 if (session != last_focused_session_) {
 522                                         // Activate correct tab if necessary
 523                                         shared_ptr<Session> tab_session = get_tab_session(
 524                                                 session_selector_.currentIndex());
 525                                         if (tab_session != session)
 526                                                 session_selector_.setCurrentWidget(
 527                                                         session_windows_.at(session));
 528
 529                                         on_focused_session_changed(session);
 530                                 }
 531
 532                                 break;
 533                         }
 534                 }
 535         }
 536
 537         if (sessions_.empty())
 538                 setWindowTitle(WindowTitle);
 539 }
 540
 541 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 542 {
 543         last_focused_session_ = session;
 544
 545         setWindowTitle(session->name() + " - " + WindowTitle);
 546
 547         // Update the state of the run/stop button, too
 548         on_capture_state_changed(session.get());
 549 }
 550
 551 void MainWindow::on_new_session_clicked()
 552 {
 553         add_session();
 554 }
 555
 556 void MainWindow::on_run_stop_clicked()
 557 {
 558         shared_ptr<Session> session = last_focused_session_;
 559
 560         if (!session)
 561                 return;
 562
 563         switch (session->get_capture_state()) {
 564         case Session::Stopped:
 565                 session->start_capture([&](QString message) {
 566                         session_error("Capture failed", message); });
 567                 break;
 568         case Session::AwaitingTrigger:
 569         case Session::Running:
 570                 session->stop_capture();
 571                 break;
 572         }
 573 }
 574
 575 void MainWindow::on_session_name_changed()
 576 {
 577         // Update the corresponding dock widget's name(s)
 578         Session *session = qobject_cast<Session*>(QObject::sender());
 579         assert(session);
 580
 581         for (shared_ptr<views::ViewBase> view : session->views()) {
 582                 // Get the dock that contains the view
 583                 for (auto entry : view_docks_)
 584                         if (entry.second == view) {
 585                                 entry.first->setObjectName(session->name());
 586                                 entry.first->setWindowTitle(session->name());
 587                         }
 588         }
 589
 590         // Update the tab widget by finding the main window and the tab from that
 591         for (auto entry : session_windows_)
 592                 if (entry.first.get() == session) {
 593                         QMainWindow *window = entry.second;
 594                         const int index = session_selector_.indexOf(window);
 595                         session_selector_.setTabText(index, session->name());
 596                 }
 597
 598         // Refresh window title if the affected session has focus
 599         if (session == last_focused_session_.get())
 600                 setWindowTitle(session->name() + " - " + WindowTitle);
 601 }
 602
 603 void MainWindow::on_capture_state_changed(QObject *obj)
 604 {
 605         Session *caller = qobject_cast<Session*>(obj);
 606
 607         // Ignore if caller is not the currently focused session
 608         // unless there is only one session
 609         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 610                 return;
 611
 612         int state = caller->get_capture_state();
 613
 614         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 615         run_stop_button_->setIcon(*icons[state]);
 616         run_stop_button_->setText((state == pv::Session::Stopped) ?
 617                 tr("Run") : tr("Stop"));
 618 }
 619
 620 void MainWindow::on_new_view(Session *session)
 621 {
 622         // We get a pointer and need a reference
 623         for (std::shared_ptr<Session> s : sessions_)
 624                 if (s.get() == session)
 625                         add_view(session->name(), views::ViewTypeTrace, *s);
 626 }
 627
 628 void MainWindow::on_view_close_clicked()
 629 {
 630         // Find the dock widget that contains the close button that was clicked
 631         QObject *w = QObject::sender();
 632         QDockWidget *dock = 0;
 633
 634         while (w) {
 635             dock = qobject_cast<QDockWidget*>(w);
 636             if (dock)
 637                 break;
 638             w = w->parent();
 639         }
 640
 641         // Get the view contained in the dock widget
 642         shared_ptr<views::ViewBase> view;
 643
 644         for (auto entry : view_docks_)
 645                 if (entry.first == dock)
 646                         view = entry.second;
 647
 648         // Deregister the view
 649         for (shared_ptr<Session> session : sessions_) {
 650                 if (!session->has_view(view))
 651                         continue;
 652
 653                 // Also destroy the entire session if its main view is closing
 654                 if (view == session->main_view()) {
 655                         remove_session(session);
 656                         break;
 657                 } else
 658                         session->deregister_view(view);
 659         }
 660 }
 661
 662 void MainWindow::on_tab_changed(int index)
 663 {
 664         shared_ptr<Session> session = get_tab_session(index);
 665
 666         if (session)
 667                 on_focused_session_changed(session);
 668 }
 669
 670 void MainWindow::on_tab_close_requested(int index)
 671 {
 672         // TODO Ask user if this is intended in case data is unsaved
 673
 674         shared_ptr<Session> session = get_tab_session(index);
 675
 676         if (session)
 677                 remove_session(session);
 678 }
 679
 680 void MainWindow::on_actionViewStickyScrolling_triggered()
 681 {
 682         shared_ptr<views::ViewBase> viewbase = get_active_view();
 683         views::TraceView::View* view =
 684                 qobject_cast<views::TraceView::View*>(viewbase.get());
 685         if (view)
 686                 view->enable_sticky_scrolling(action_view_sticky_scrolling_->isChecked());
 687 }
 688
 689 void MainWindow::on_actionViewColouredBg_triggered()
 690 {
 691         shared_ptr<views::ViewBase> viewbase = get_active_view();
 692         views::TraceView::View* view =
 693                         qobject_cast<views::TraceView::View*>(viewbase.get());
 694         if (view)
 695                 view->enable_coloured_bg(action_view_coloured_bg_->isChecked());
 696 }
 697
 698 void MainWindow::on_actionAbout_triggered()
 699 {
 700         dialogs::About dlg(device_manager_.context(), this);
 701         dlg.exec();
 702 }
 703
 704 } // namespace pv