2 * This file is part of the PulseView project.
4 * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
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.
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.
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/>.
21 #include <libsigrokdecode/libsigrokdecode.h>
31 #include <QApplication>
32 #include <QCloseEvent>
34 #include <QDockWidget>
35 #include <QHBoxLayout>
36 #include <QMessageBox>
41 #include "mainwindow.hpp"
43 #include "devicemanager.hpp"
44 #include "devices/hardwaredevice.hpp"
45 #include "dialogs/settings.hpp"
46 #include "globalsettings.hpp"
47 #include "toolbars/mainbar.hpp"
49 #include "views/trace/view.hpp"
50 #include "views/trace/standardbar.hpp"
52 #include <libsigrokcxx/libsigrokcxx.hpp>
54 using std::dynamic_pointer_cast;
55 using std::make_shared;
56 using std::shared_ptr;
65 using toolbars::MainBar;
67 const QString MainWindow::WindowTitle = tr("PulseView");
69 MainWindow::MainWindow(DeviceManager &device_manager, QWidget *parent) :
71 device_manager_(device_manager),
72 session_selector_(this),
73 session_state_mapper_(this),
74 icon_red_(":/icons/status-red.svg"),
75 icon_green_(":/icons/status-green.svg"),
76 icon_grey_(":/icons/status-grey.svg")
78 GlobalSettings::add_change_handler(this);
81 restore_ui_settings();
84 MainWindow::~MainWindow()
86 GlobalSettings::remove_change_handler(this);
88 while (!sessions_.empty())
89 remove_session(sessions_.front());
92 void MainWindow::show_session_error(const QString text, const QString info_text)
94 // TODO Emulate noquote()
95 qDebug() << "Notifying user of session error:" << info_text;
99 msg.setInformativeText(info_text);
100 msg.setStandardButtons(QMessageBox::Ok);
101 msg.setIcon(QMessageBox::Warning);
105 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
107 // If there's only one view, use it...
108 if (view_docks_.size() == 1)
109 return view_docks_.begin()->second;
111 // ...otherwise find the dock widget the widget with focus is contained in
112 QObject *w = QApplication::focusWidget();
113 QDockWidget *dock = nullptr;
116 dock = qobject_cast<QDockWidget*>(w);
122 // Get the view contained in the dock widget
123 for (auto& entry : view_docks_)
124 if (entry.first == dock)
130 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
131 views::ViewType type, Session &session)
133 GlobalSettings settings;
134 shared_ptr<views::ViewBase> v;
136 QMainWindow *main_window = nullptr;
137 for (auto& entry : session_windows_)
138 if (entry.first.get() == &session)
139 main_window = entry.second;
143 shared_ptr<MainBar> main_bar = session.main_bar();
145 QDockWidget* dock = new QDockWidget(title, main_window);
146 dock->setObjectName(title);
147 main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
149 // Insert a QMainWindow into the dock widget to allow for a tool bar
150 QMainWindow *dock_main = new QMainWindow(dock);
151 dock_main->setWindowFlags(Qt::Widget); // Remove Qt::Window flag
153 if (type == views::ViewTypeTrace)
154 // This view will be the main view if there's no main bar yet
155 v = make_shared<views::trace::View>(session,
156 (main_bar ? false : true), dock_main);
161 view_docks_[dock] = v;
162 session.register_view(v);
164 dock_main->setCentralWidget(v.get());
165 dock->setWidget(dock_main);
167 dock->setContextMenuPolicy(Qt::PreventContextMenu);
168 dock->setFeatures(QDockWidget::DockWidgetMovable |
169 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
171 QAbstractButton *close_btn =
172 dock->findChildren<QAbstractButton*>("qt_dockwidget_closebutton") // clazy:exclude=detaching-temporary
175 connect(close_btn, SIGNAL(clicked(bool)),
176 this, SLOT(on_view_close_clicked()));
178 connect(&session, SIGNAL(trigger_event(int, util::Timestamp)),
179 qobject_cast<views::ViewBase*>(v.get()),
180 SLOT(trigger_event(int, util::Timestamp)));
182 if (type == views::ViewTypeTrace) {
183 views::trace::View *tv =
184 qobject_cast<views::trace::View*>(v.get());
186 tv->enable_colored_bg(settings.value(GlobalSettings::Key_View_ColoredBG).toBool());
187 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
188 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
191 /* Initial view, create the main bar */
192 main_bar = make_shared<MainBar>(session, this, tv);
193 dock_main->addToolBar(main_bar.get());
194 session.set_main_bar(main_bar);
196 connect(main_bar.get(), SIGNAL(new_view(Session*)),
197 this, SLOT(on_new_view(Session*)));
199 main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
201 /* For the main view we need to prevent the dock widget from
202 * closing itself when its close button is clicked. This is
203 * so we can confirm with the user first. Regular views don't
205 close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
207 /* Additional view, create a standard bar */
208 pv::views::trace::StandardBar *standard_bar =
209 new pv::views::trace::StandardBar(session, this, tv);
210 dock_main->addToolBar(standard_bar);
212 standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
219 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
221 for (shared_ptr<Session> session : sessions_) {
222 if (!session->has_view(view))
225 // Find the dock the view is contained in and remove it
226 for (auto& entry : view_docks_)
227 if (entry.second == view) {
228 // Remove the view from the session
229 session->deregister_view(view);
231 // Remove the view from its parent; otherwise, Qt will
232 // call deleteLater() on it, which causes a double free
233 // since the shared_ptr in view_docks_ doesn't know
234 // that Qt keeps a pointer to the view around
235 view->setParent(nullptr);
237 // Delete the view's dock widget and all widgets inside it
238 entry.first->deleteLater();
240 // Remove the dock widget from the list and stop iterating
241 view_docks_.erase(entry.first);
247 shared_ptr<Session> MainWindow::add_session()
249 static int last_session_id = 1;
250 QString name = tr("Session %1").arg(last_session_id++);
252 shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
254 connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
255 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
256 connect(session.get(), SIGNAL(name_changed()),
257 this, SLOT(on_session_name_changed()));
258 session_state_mapper_.setMapping(session.get(), session.get());
259 connect(session.get(), SIGNAL(capture_state_changed(int)),
260 &session_state_mapper_, SLOT(map()));
262 sessions_.push_back(session);
264 QMainWindow *window = new QMainWindow();
265 window->setWindowFlags(Qt::Widget); // Remove Qt::Window flag
266 session_windows_[session] = window;
268 int index = session_selector_.addTab(window, name);
269 session_selector_.setCurrentIndex(index);
270 last_focused_session_ = session;
272 window->setDockNestingEnabled(true);
274 shared_ptr<views::ViewBase> main_view =
275 add_view(name, views::ViewTypeTrace, *session);
280 void MainWindow::remove_session(shared_ptr<Session> session)
282 // Determine the height of the button before it collapses
283 int h = new_session_button_->height();
285 // Stop capture while the session still exists so that the UI can be
286 // updated in case we're currently running. If so, this will schedule a
287 // call to our on_capture_state_changed() slot for the next run of the
288 // event loop. We need to have this executed immediately or else it will
289 // be dismissed since the session object will be deleted by the time we
290 // leave this method and the event loop gets a chance to run again.
291 session->stop_capture();
292 QApplication::processEvents();
294 for (const shared_ptr<views::ViewBase>& view : session->views())
297 QMainWindow *window = session_windows_.at(session);
298 session_selector_.removeTab(session_selector_.indexOf(window));
300 session_windows_.erase(session);
302 if (last_focused_session_ == session)
303 last_focused_session_.reset();
305 // Remove the session from our list of sessions (which also destroys it)
306 sessions_.remove_if([&](shared_ptr<Session> s) {
307 return s == session; });
309 if (sessions_.empty()) {
310 // When there are no more tabs, the height of the QTabWidget
311 // drops to zero. We must prevent this to keep the static
313 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>()) // clazy:exclude=range-loop
314 w->setMinimumHeight(h);
316 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
317 static_tab_widget_->setMinimumHeight(h + 2 * margin);
318 session_selector_.setMinimumHeight(h + 2 * margin);
320 // Update the window title if there is no view left to
321 // generate focus change events
322 setWindowTitle(WindowTitle);
326 void MainWindow::add_session_with_file(string open_file_name,
327 string open_file_format)
329 shared_ptr<Session> session = add_session();
330 session->load_init_file(open_file_name, open_file_format);
333 void MainWindow::add_default_session()
335 // Only add the default session if there would be no session otherwise
336 if (sessions_.size() > 0)
339 shared_ptr<Session> session = add_session();
341 // Check the list of available devices. Prefer the one that was
342 // found with user supplied scan specs (if applicable). Then try
343 // one of the auto detected devices that are not the demo device.
344 // Pick demo in the absence of "genuine" hardware devices.
345 shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
346 for (const shared_ptr<devices::HardwareDevice>& dev : device_manager_.devices()) {
347 if (dev == device_manager_.user_spec_device()) {
349 } else if (dev->hardware_device()->driver()->name() == "demo") {
356 session->select_device(user_device);
357 else if (other_device)
358 session->select_device(other_device);
360 session->select_device(demo_device);
363 void MainWindow::save_sessions()
368 for (shared_ptr<Session>& session : sessions_) {
369 // Ignore sessions using the demo device or no device at all
370 if (session->device()) {
371 shared_ptr<devices::HardwareDevice> device =
372 dynamic_pointer_cast< devices::HardwareDevice >
376 device->hardware_device()->driver()->name() == "demo")
379 settings.beginGroup("Session" + QString::number(id++));
380 settings.remove(""); // Remove all keys in this group
381 session->save_settings(settings);
386 settings.setValue("sessions", id);
389 void MainWindow::restore_sessions()
392 int i, session_count;
394 session_count = settings.value("sessions", 0).toInt();
396 for (i = 0; i < session_count; i++) {
397 settings.beginGroup("Session" + QString::number(i));
398 shared_ptr<Session> session = add_session();
399 session->restore_settings(settings);
404 void MainWindow::on_setting_changed(const QString &key, const QVariant &value)
406 if (key == GlobalSettings::Key_View_ColoredBG)
407 on_settingViewColoredBg_changed(value);
409 if (key == GlobalSettings::Key_View_ShowSamplingPoints)
410 on_settingViewShowSamplingPoints_changed(value);
412 if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
413 on_settingViewShowAnalogMinorGrid_changed(value);
416 void MainWindow::setup_ui()
418 setObjectName(QString::fromUtf8("MainWindow"));
420 setCentralWidget(&session_selector_);
422 // Set the window icon
424 icon.addFile(QString(":/icons/pulseview.png"));
427 view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
428 view_sticky_scrolling_shortcut_->setAutoRepeat(false);
430 view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
431 view_show_sampling_points_shortcut_->setAutoRepeat(false);
433 view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
434 view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
436 view_colored_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_colored_bg_shortcut()));
437 view_colored_bg_shortcut_->setAutoRepeat(false);
439 // Set up the tab area
440 new_session_button_ = new QToolButton();
441 new_session_button_->setIcon(QIcon::fromTheme("document-new",
442 QIcon(":/icons/document-new.png")));
443 new_session_button_->setToolTip(tr("Create New Session"));
444 new_session_button_->setAutoRaise(true);
446 run_stop_button_ = new QToolButton();
447 run_stop_button_->setAutoRaise(true);
448 run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
449 run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
451 run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
452 run_stop_shortcut_->setAutoRepeat(false);
454 settings_button_ = new QToolButton();
455 settings_button_->setIcon(QIcon::fromTheme("preferences-system",
456 QIcon(":/icons/preferences-system.png")));
457 settings_button_->setToolTip(tr("Settings"));
458 settings_button_->setAutoRaise(true);
460 QFrame *separator1 = new QFrame();
461 separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
462 QFrame *separator2 = new QFrame();
463 separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
465 QHBoxLayout* layout = new QHBoxLayout();
466 layout->setContentsMargins(2, 2, 2, 2);
467 layout->addWidget(new_session_button_);
468 layout->addWidget(separator1);
469 layout->addWidget(run_stop_button_);
470 layout->addWidget(separator2);
471 layout->addWidget(settings_button_);
473 static_tab_widget_ = new QWidget();
474 static_tab_widget_->setLayout(layout);
476 session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
477 session_selector_.setTabsClosable(true);
479 close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
480 close_application_shortcut_->setAutoRepeat(false);
482 close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
484 connect(new_session_button_, SIGNAL(clicked(bool)),
485 this, SLOT(on_new_session_clicked()));
486 connect(run_stop_button_, SIGNAL(clicked(bool)),
487 this, SLOT(on_run_stop_clicked()));
488 connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
489 this, SLOT(on_capture_state_changed(QObject*)));
490 connect(settings_button_, SIGNAL(clicked(bool)),
491 this, SLOT(on_settings_clicked()));
493 connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
494 this, SLOT(on_tab_close_requested(int)));
495 connect(&session_selector_, SIGNAL(currentChanged(int)),
496 this, SLOT(on_tab_changed(int)));
499 connect(static_cast<QApplication *>(QCoreApplication::instance()),
500 SIGNAL(focusChanged(QWidget*, QWidget*)),
501 this, SLOT(on_focus_changed()));
504 void MainWindow::save_ui_settings()
508 settings.beginGroup("MainWindow");
509 settings.setValue("state", saveState());
510 settings.setValue("geometry", saveGeometry());
514 void MainWindow::restore_ui_settings()
518 settings.beginGroup("MainWindow");
520 if (settings.contains("geometry")) {
521 restoreGeometry(settings.value("geometry").toByteArray());
522 restoreState(settings.value("state").toByteArray());
529 shared_ptr<Session> MainWindow::get_tab_session(int index) const
531 // Find the session that belongs to the tab's main window
532 for (auto& entry : session_windows_)
533 if (entry.second == session_selector_.widget(index))
539 void MainWindow::closeEvent(QCloseEvent *event)
541 bool data_saved = true;
543 for (auto& entry : session_windows_)
544 if (!entry.first->data_saved())
547 if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
548 tr("There is unsaved data. Close anyway?"),
549 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
558 QMenu* MainWindow::createPopupMenu()
563 bool MainWindow::restoreState(const QByteArray &state, int version)
568 // Do nothing. We don't want Qt to handle this, or else it
569 // will try to restore all the dock widgets and create havoc.
574 void MainWindow::on_add_view(const QString &title, views::ViewType type,
577 // We get a pointer and need a reference
578 for (shared_ptr<Session>& s : sessions_)
579 if (s.get() == session)
580 add_view(title, type, *s);
583 void MainWindow::on_focus_changed()
585 shared_ptr<views::ViewBase> view = get_active_view();
588 for (shared_ptr<Session> session : sessions_) {
589 if (session->has_view(view)) {
590 if (session != last_focused_session_) {
591 // Activate correct tab if necessary
592 shared_ptr<Session> tab_session = get_tab_session(
593 session_selector_.currentIndex());
594 if (tab_session != session)
595 session_selector_.setCurrentWidget(
596 session_windows_.at(session));
598 on_focused_session_changed(session);
606 if (sessions_.empty())
607 setWindowTitle(WindowTitle);
610 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
612 last_focused_session_ = session;
614 setWindowTitle(session->name() + " - " + WindowTitle);
616 // Update the state of the run/stop button, too
617 on_capture_state_changed(session.get());
620 void MainWindow::on_new_session_clicked()
625 void MainWindow::on_run_stop_clicked()
627 shared_ptr<Session> session = last_focused_session_;
632 switch (session->get_capture_state()) {
633 case Session::Stopped:
634 session->start_capture([&](QString message) {
635 show_session_error("Capture failed", message); });
637 case Session::AwaitingTrigger:
638 case Session::Running:
639 session->stop_capture();
644 void MainWindow::on_settings_clicked()
646 dialogs::Settings dlg(device_manager_);
650 void MainWindow::on_session_name_changed()
652 // Update the corresponding dock widget's name(s)
653 Session *session = qobject_cast<Session*>(QObject::sender());
656 for (const shared_ptr<views::ViewBase>& view : session->views()) {
657 // Get the dock that contains the view
658 for (auto& entry : view_docks_)
659 if (entry.second == view) {
660 entry.first->setObjectName(session->name());
661 entry.first->setWindowTitle(session->name());
665 // Update the tab widget by finding the main window and the tab from that
666 for (auto& entry : session_windows_)
667 if (entry.first.get() == session) {
668 QMainWindow *window = entry.second;
669 const int index = session_selector_.indexOf(window);
670 session_selector_.setTabText(index, session->name());
673 // Refresh window title if the affected session has focus
674 if (session == last_focused_session_.get())
675 setWindowTitle(session->name() + " - " + WindowTitle);
678 void MainWindow::on_capture_state_changed(QObject *obj)
680 Session *caller = qobject_cast<Session*>(obj);
682 // Ignore if caller is not the currently focused session
683 // unless there is only one session
684 if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
687 int state = caller->get_capture_state();
689 const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
690 run_stop_button_->setIcon(*icons[state]);
691 run_stop_button_->setText((state == pv::Session::Stopped) ?
692 tr("Run") : tr("Stop"));
695 void MainWindow::on_new_view(Session *session)
697 // We get a pointer and need a reference
698 for (shared_ptr<Session>& s : sessions_)
699 if (s.get() == session)
700 add_view(session->name(), views::ViewTypeTrace, *s);
703 void MainWindow::on_view_close_clicked()
705 // Find the dock widget that contains the close button that was clicked
706 QObject *w = QObject::sender();
707 QDockWidget *dock = nullptr;
710 dock = qobject_cast<QDockWidget*>(w);
716 // Get the view contained in the dock widget
717 shared_ptr<views::ViewBase> view;
719 for (auto& entry : view_docks_)
720 if (entry.first == dock)
723 // Deregister the view
724 for (shared_ptr<Session> session : sessions_) {
725 if (!session->has_view(view))
728 // Also destroy the entire session if its main view is closing...
729 if (view == session->main_view()) {
730 // ...but only if data is saved or the user confirms closing
731 if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
732 tr("This session contains unsaved data. Close it anyway?"),
733 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
734 remove_session(session);
737 // All other views can be closed at any time as no data will be lost
742 void MainWindow::on_tab_changed(int index)
744 shared_ptr<Session> session = get_tab_session(index);
747 on_focused_session_changed(session);
750 void MainWindow::on_tab_close_requested(int index)
752 shared_ptr<Session> session = get_tab_session(index);
757 if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
758 tr("This session contains unsaved data. Close it anyway?"),
759 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
760 remove_session(session);
763 void MainWindow::on_view_colored_bg_shortcut()
765 GlobalSettings settings;
767 bool state = settings.value(GlobalSettings::Key_View_ColoredBG).toBool();
768 settings.setValue(GlobalSettings::Key_View_ColoredBG, !state);
771 void MainWindow::on_view_sticky_scrolling_shortcut()
773 GlobalSettings settings;
775 bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
776 settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
779 void MainWindow::on_view_show_sampling_points_shortcut()
781 GlobalSettings settings;
783 bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
784 settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
787 void MainWindow::on_view_show_analog_minor_grid_shortcut()
789 GlobalSettings settings;
791 bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
792 settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
795 void MainWindow::on_settingViewColoredBg_changed(const QVariant new_value)
797 bool state = new_value.toBool();
799 for (auto& entry : view_docks_) {
800 shared_ptr<views::ViewBase> viewbase = entry.second;
802 // Only trace views have this setting
803 views::trace::View* view =
804 qobject_cast<views::trace::View*>(viewbase.get());
806 view->enable_colored_bg(state);
810 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
812 bool state = new_value.toBool();
814 for (auto& entry : view_docks_) {
815 shared_ptr<views::ViewBase> viewbase = entry.second;
817 // Only trace views have this setting
818 views::trace::View* view =
819 qobject_cast<views::trace::View*>(viewbase.get());
821 view->enable_show_sampling_points(state);
825 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
827 bool state = new_value.toBool();
829 for (auto& entry : view_docks_) {
830 shared_ptr<views::ViewBase> viewbase = entry.second;
832 // Only trace views have this setting
833 views::trace::View* view =
834 qobject_cast<views::trace::View*>(viewbase.get());
836 view->enable_show_analog_minor_grid(state);
840 void MainWindow::on_close_current_tab()
842 int tab = session_selector_.currentIndex();
844 on_tab_close_requested(tab);