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
  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;
 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                                 main_bar = make_shared<MainBar>(session, *this);
 208                                 dock_main->addToolBar(main_bar.get());
 209                                 session.set_main_bar(main_bar);
 210
 211                                 connect(main_bar.get(), SIGNAL(new_view(Session*)),
 212                                         this, SLOT(on_new_view(Session*)));
 213                         }
 214                         main_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 215
 216                         connect(v.get(), SIGNAL(always_zoom_to_fit_changed(bool)),
 217                                 main_bar.get(), SLOT(on_always_zoom_to_fit_changed(bool)));
 218                 }
 219
 220                 return v;
 221         }
 222
 223         return nullptr;
 224 }
 225
 226 shared_ptr<Session> MainWindow::add_session()
 227 {
 228         static int last_session_id = 1;
 229         QString name = tr("Untitled-%1").arg(last_session_id++);
 230
 231         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 232
 233         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 234                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 235         connect(session.get(), SIGNAL(name_changed()),
 236                 this, SLOT(on_session_name_changed()));
 237         session_state_mapper_.setMapping(session.get(), session.get());
 238         connect(session.get(), SIGNAL(capture_state_changed(int)),
 239                 &session_state_mapper_, SLOT(map()));
 240
 241         sessions_.push_back(session);
 242
 243         QMainWindow *window = new QMainWindow();
 244         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 245         session_windows_[session] = window;
 246
 247         int index = session_selector_.addTab(window, name);
 248         session_selector_.setCurrentIndex(index);
 249         last_focused_session_ = session;
 250
 251         window->setDockNestingEnabled(true);
 252
 253         shared_ptr<views::ViewBase> main_view =
 254                 add_view(name, views::ViewTypeTrace, *session);
 255
 256         return session;
 257 }
 258
 259 void MainWindow::remove_session(shared_ptr<Session> session)
 260 {
 261         int h = new_session_button_->height();
 262
 263         for (shared_ptr<views::ViewBase> view : session->views()) {
 264                 // Find the dock the view is contained in and remove it
 265                 for (auto entry : view_docks_)
 266                         if (entry.second == view) {
 267                                 // Remove the view from the session
 268                                 session->deregister_view(view);
 269
 270                                 // Remove the view from its parent; otherwise, Qt will
 271                                 // call deleteLater() on it, which causes a double free
 272                                 // since the shared_ptr in view_docks_ doesn't know
 273                                 // that Qt keeps a pointer to the view around
 274                                 entry.second->setParent(0);
 275
 276                                 // Remove this entry from the container
 277                                 view_docks_.erase(entry.first);
 278                         }
 279         }
 280
 281         QMainWindow *window = session_windows_.at(session);
 282         session_selector_.removeTab(session_selector_.indexOf(window));
 283
 284         session_windows_.erase(session);
 285
 286         if (last_focused_session_ == session)
 287                 last_focused_session_.reset();
 288
 289         sessions_.remove_if([&](shared_ptr<Session> s) {
 290                 return s == session; });
 291
 292         if (sessions_.empty()) {
 293                 // When there are no more tabs, the height of the QTabWidget
 294                 // drops to zero. We must prevent this to keep the static
 295                 // widgets visible
 296                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 297                         w->setMinimumHeight(h);
 298
 299                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 300                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 301                 session_selector_.setMinimumHeight(h + 2 * margin);
 302
 303                 // Update the window title if there is no view left to
 304                 // generate focus change events
 305                 setWindowTitle(WindowTitle);
 306         }
 307 }
 308
 309 void MainWindow::setup_ui()
 310 {
 311         setObjectName(QString::fromUtf8("MainWindow"));
 312
 313         setCentralWidget(&session_selector_);
 314
 315         // Set the window icon
 316         QIcon icon;
 317         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 318         setWindowIcon(icon);
 319
 320         action_view_sticky_scrolling_->setCheckable(true);
 321         action_view_sticky_scrolling_->setChecked(true);
 322         action_view_sticky_scrolling_->setShortcut(QKeySequence(Qt::Key_S));
 323         action_view_sticky_scrolling_->setObjectName(
 324                 QString::fromUtf8("actionViewStickyScrolling"));
 325         action_view_sticky_scrolling_->setText(tr("&Sticky Scrolling"));
 326
 327         action_view_coloured_bg_->setCheckable(true);
 328         action_view_coloured_bg_->setChecked(true);
 329         action_view_coloured_bg_->setShortcut(QKeySequence(Qt::Key_B));
 330         action_view_coloured_bg_->setObjectName(
 331                 QString::fromUtf8("actionViewColouredBg"));
 332         action_view_coloured_bg_->setText(tr("Use &coloured backgrounds"));
 333
 334         action_about_->setObjectName(QString::fromUtf8("actionAbout"));
 335         action_about_->setText(tr("&About..."));
 336
 337         // Set up the tab area
 338         new_session_button_ = new QToolButton();
 339         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 340                 QIcon(":/icons/document-new.png")));
 341         new_session_button_->setAutoRaise(true);
 342
 343         run_stop_button_ = new QToolButton();
 344         run_stop_button_->setAutoRaise(true);
 345         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 346         run_stop_button_->setShortcut(QKeySequence(Qt::Key_Space));
 347
 348         settings_button_ = new QToolButton();
 349         settings_button_->setIcon(QIcon::fromTheme("configure",
 350                 QIcon(":/icons/configure.png")));
 351         settings_button_->setAutoRaise(true);
 352
 353         QFrame *separator1 = new QFrame();
 354         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 355         QFrame *separator2 = new QFrame();
 356         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 357
 358         QHBoxLayout* layout = new QHBoxLayout();
 359         layout->setContentsMargins(2, 2, 2, 2);
 360         layout->addWidget(new_session_button_);
 361         layout->addWidget(separator1);
 362         layout->addWidget(run_stop_button_);
 363         layout->addWidget(separator2);
 364         layout->addWidget(settings_button_);
 365
 366         static_tab_widget_ = new QWidget();
 367         static_tab_widget_->setLayout(layout);
 368
 369         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 370         session_selector_.setTabsClosable(true);
 371
 372         connect(new_session_button_, SIGNAL(clicked(bool)),
 373                 this, SLOT(on_new_session_clicked()));
 374         connect(run_stop_button_, SIGNAL(clicked(bool)),
 375                 this, SLOT(on_run_stop_clicked()));
 376         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 377                 this, SLOT(on_capture_state_changed(QObject*)));
 378
 379         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 380                 this, SLOT(on_tab_close_requested(int)));
 381         connect(&session_selector_, SIGNAL(currentChanged(int)),
 382                 this, SLOT(on_tab_changed(int)));
 383
 384
 385         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 386                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 387                 this, SLOT(on_focus_changed()));
 388 }
 389
 390 void MainWindow::save_ui_settings()
 391 {
 392         QSettings settings;
 393         int id = 0;
 394
 395         settings.beginGroup("MainWindow");
 396         settings.setValue("state", saveState());
 397         settings.setValue("geometry", saveGeometry());
 398         settings.endGroup();
 399
 400         for (shared_ptr<Session> session : sessions_) {
 401                 // Ignore sessions using the demo device or no device at all
 402                 if (session->device()) {
 403                         shared_ptr<devices::HardwareDevice> device =
 404                                 dynamic_pointer_cast< devices::HardwareDevice >
 405                                 (session->device());
 406
 407                         if (device &&
 408                                 device->hardware_device()->driver()->name() == "demo")
 409                                 continue;
 410
 411                         settings.beginGroup("Session" + QString::number(id++));
 412                         settings.remove("");  // Remove all keys in this group
 413                         session->save_settings(settings);
 414                         settings.endGroup();
 415                 }
 416         }
 417
 418         settings.setValue("sessions", id);
 419 }
 420
 421 void MainWindow::restore_ui_settings()
 422 {
 423         QSettings settings;
 424         int i, session_count;
 425
 426         settings.beginGroup("MainWindow");
 427
 428         if (settings.contains("geometry")) {
 429                 restoreGeometry(settings.value("geometry").toByteArray());
 430                 restoreState(settings.value("state").toByteArray());
 431         } else
 432                 resize(1000, 720);
 433
 434         settings.endGroup();
 435
 436         session_count = settings.value("sessions", 0).toInt();
 437
 438         for (i = 0; i < session_count; i++) {
 439                 settings.beginGroup("Session" + QString::number(i));
 440                 shared_ptr<Session> session = add_session();
 441                 session->restore_settings(settings);
 442                 settings.endGroup();
 443         }
 444 }
 445
 446 std::shared_ptr<Session> MainWindow::get_tab_session(int index) const
 447 {
 448         // Find the session that belongs to the tab's main window
 449         for (auto entry : session_windows_)
 450                 if (entry.second == session_selector_.widget(index))
 451                         return entry.first;
 452
 453         return nullptr;
 454 }
 455
 456 void MainWindow::closeEvent(QCloseEvent *event)
 457 {
 458         save_ui_settings();
 459         event->accept();
 460 }
 461
 462 QMenu* MainWindow::createPopupMenu()
 463 {
 464         return nullptr;
 465 }
 466
 467 bool MainWindow::restoreState(const QByteArray &state, int version)
 468 {
 469         (void)state;
 470         (void)version;
 471
 472         // Do nothing. We don't want Qt to handle this, or else it
 473         // will try to restore all the dock widgets and create havoc.
 474
 475         return false;
 476 }
 477
 478 void MainWindow::session_error(const QString text, const QString info_text)
 479 {
 480         QMetaObject::invokeMethod(this, "show_session_error",
 481                 Qt::QueuedConnection, Q_ARG(QString, text),
 482                 Q_ARG(QString, info_text));
 483 }
 484
 485 void MainWindow::show_session_error(const QString text, const QString info_text)
 486 {
 487         QMessageBox msg(this);
 488         msg.setText(text);
 489         msg.setInformativeText(info_text);
 490         msg.setStandardButtons(QMessageBox::Ok);
 491         msg.setIcon(QMessageBox::Warning);
 492         msg.exec();
 493 }
 494
 495 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 496         Session *session)
 497 {
 498         // We get a pointer and need a reference
 499         for (std::shared_ptr<Session> s : sessions_)
 500                 if (s.get() == session)
 501                         add_view(title, type, *s);
 502 }
 503
 504 void MainWindow::on_focus_changed()
 505 {
 506         shared_ptr<views::ViewBase> view = get_active_view();
 507
 508         if (view) {
 509                 for (shared_ptr<Session> session : sessions_) {
 510                         if (session->has_view(view)) {
 511                                 if (session != last_focused_session_) {
 512                                         // Activate correct tab if necessary
 513                                         shared_ptr<Session> tab_session = get_tab_session(
 514                                                 session_selector_.currentIndex());
 515                                         if (tab_session != session)
 516                                                 session_selector_.setCurrentWidget(
 517                                                         session_windows_.at(session));
 518
 519                                         on_focused_session_changed(session);
 520                                 }
 521
 522                                 break;
 523                         }
 524                 }
 525         }
 526
 527         if (sessions_.empty())
 528                 setWindowTitle(WindowTitle);
 529 }
 530
 531 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 532 {
 533         last_focused_session_ = session;
 534
 535         setWindowTitle(session->name() + " - " + WindowTitle);
 536
 537         // Update the state of the run/stop button, too
 538         on_capture_state_changed(session.get());
 539 }
 540
 541 void MainWindow::on_new_session_clicked()
 542 {
 543         add_session();
 544 }
 545
 546 void MainWindow::on_run_stop_clicked()
 547 {
 548         shared_ptr<Session> session = last_focused_session_;
 549
 550         if (!session)
 551                 return;
 552
 553         switch (session->get_capture_state()) {
 554         case Session::Stopped:
 555                 session->start_capture([&](QString message) {
 556                         session_error("Capture failed", message); });
 557                 break;
 558         case Session::AwaitingTrigger:
 559         case Session::Running:
 560                 session->stop_capture();
 561                 break;
 562         }
 563 }
 564
 565 void MainWindow::on_session_name_changed()
 566 {
 567         // Update the corresponding dock widget's name(s)
 568         Session *session = qobject_cast<Session*>(QObject::sender());
 569         assert(session);
 570
 571         for (shared_ptr<views::ViewBase> view : session->views()) {
 572                 // Get the dock that contains the view
 573                 for (auto entry : view_docks_)
 574                         if (entry.second == view) {
 575                                 entry.first->setObjectName(session->name());
 576                                 entry.first->setWindowTitle(session->name());
 577                         }
 578         }
 579
 580         // Update the tab widget by finding the main window and the tab from that
 581         for (auto entry : session_windows_)
 582                 if (entry.first.get() == session) {
 583                         QMainWindow *window = entry.second;
 584                         const int index = session_selector_.indexOf(window);
 585                         session_selector_.setTabText(index, session->name());
 586                 }
 587
 588         // Refresh window title if the affected session has focus
 589         if (session == last_focused_session_.get())
 590                 setWindowTitle(session->name() + " - " + WindowTitle);
 591 }
 592
 593 void MainWindow::on_capture_state_changed(QObject *obj)
 594 {
 595         Session *caller = qobject_cast<Session*>(obj);
 596
 597         // Ignore if caller is not the currently focused session
 598         // unless there is only one session
 599         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 600                 return;
 601
 602         int state = caller->get_capture_state();
 603
 604         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 605         run_stop_button_->setIcon(*icons[state]);
 606         run_stop_button_->setText((state == pv::Session::Stopped) ?
 607                 tr("Run") : tr("Stop"));
 608 }
 609
 610 void MainWindow::on_new_view(Session *session)
 611 {
 612         // We get a pointer and need a reference
 613         for (std::shared_ptr<Session> s : sessions_)
 614                 if (s.get() == session)
 615                         add_view(session->name(), views::ViewTypeTrace, *s);
 616 }
 617
 618 void MainWindow::on_view_close_clicked()
 619 {
 620         // Find the dock widget that contains the close button that was clicked
 621         QObject *w = QObject::sender();
 622         QDockWidget *dock = 0;
 623
 624         while (w) {
 625             dock = qobject_cast<QDockWidget*>(w);
 626             if (dock)
 627                 break;
 628             w = w->parent();
 629         }
 630
 631         // Get the view contained in the dock widget
 632         shared_ptr<views::ViewBase> view;
 633
 634         for (auto entry : view_docks_)
 635                 if (entry.first == dock)
 636                         view = entry.second;
 637
 638         // Deregister the view
 639         for (shared_ptr<Session> session : sessions_) {
 640                 if (!session->has_view(view))
 641                         continue;
 642
 643                 // Also destroy the entire session if its main view is closing
 644                 if (view == session->main_view()) {
 645                         remove_session(session);
 646                         break;
 647                 } else
 648                         session->deregister_view(view);
 649         }
 650 }
 651
 652 void MainWindow::on_tab_changed(int index)
 653 {
 654         shared_ptr<Session> session = get_tab_session(index);
 655
 656         if (session)
 657                 on_focused_session_changed(session);
 658 }
 659
 660 void MainWindow::on_tab_close_requested(int index)
 661 {
 662         // TODO Ask user if this is intended in case data is unsaved
 663
 664         shared_ptr<Session> session = get_tab_session(index);
 665
 666         if (session)
 667                 remove_session(session);
 668 }
 669
 670 void MainWindow::on_actionViewStickyScrolling_triggered()
 671 {
 672         shared_ptr<views::ViewBase> viewbase = get_active_view();
 673         views::TraceView::View* view =
 674                 qobject_cast<views::TraceView::View*>(viewbase.get());
 675         if (view)
 676                 view->enable_sticky_scrolling(action_view_sticky_scrolling_->isChecked());
 677 }
 678
 679 void MainWindow::on_actionViewColouredBg_triggered()
 680 {
 681         shared_ptr<views::ViewBase> viewbase = get_active_view();
 682         views::TraceView::View* view =
 683                         qobject_cast<views::TraceView::View*>(viewbase.get());
 684         if (view)
 685                 view->enable_coloured_bg(action_view_coloured_bg_->isChecked());
 686 }
 687
 688 void MainWindow::on_actionAbout_triggered()
 689 {
 690         dialogs::About dlg(device_manager_.context(), this);
 691         dlg.exec();
 692 }
 693
 694 } // namespace pv