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 #include <QShortcut>
  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_about_(new QAction(this)),
  78         icon_red_(":/icons/status-red.svg"),
  79         icon_green_(":/icons/status-green.svg"),
  80         icon_grey_(":/icons/status-grey.svg")
  81 {
  82         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  83         qRegisterMetaType<uint64_t>("uint64_t");
  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_about() const
 121 {
 122         return action_about_;
 123 }
 124
 125 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 126 {
 127         // If there's only one view, use it...
 128         if (view_docks_.size() == 1)
 129                 return view_docks_.begin()->second;
 130
 131         // ...otherwise find the dock widget the widget with focus is contained in
 132         QObject *w = QApplication::focusWidget();
 133         QDockWidget *dock = 0;
 134
 135         while (w) {
 136             dock = qobject_cast<QDockWidget*>(w);
 137             if (dock)
 138                 break;
 139             w = w->parent();
 140         }
 141
 142         // Get the view contained in the dock widget
 143         for (auto entry : view_docks_)
 144                 if (entry.first == dock)
 145                         return entry.second;
 146
 147         return nullptr;
 148 }
 149
 150 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 151         views::ViewType type, Session &session)
 152 {
 153         QMainWindow *main_window = nullptr;
 154         for (auto entry : session_windows_)
 155                 if (entry.first.get() == &session)
 156                         main_window = entry.second;
 157
 158         assert(main_window);
 159
 160         if (type == views::ViewTypeTrace) {
 161                 QDockWidget* dock = new QDockWidget(title, main_window);
 162                 dock->setObjectName(title);
 163                 main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 164
 165                 // Insert a QMainWindow into the dock widget to allow for a tool bar
 166                 QMainWindow *dock_main = new QMainWindow(dock);
 167                 dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 168
 169                 shared_ptr<views::TraceView::View> v =
 170                         make_shared<views::TraceView::View>(session, dock_main);
 171                 view_docks_[dock] = v;
 172                 session.register_view(v);
 173
 174                 dock_main->setCentralWidget(v.get());
 175                 dock->setWidget(dock_main);
 176
 177                 dock->setFeatures(QDockWidget::DockWidgetMovable |
 178                         QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 179
 180                 QAbstractButton *close_btn =
 181                         dock->findChildren<QAbstractButton*>
 182                                 ("qt_dockwidget_closebutton").front();
 183
 184                 connect(close_btn, SIGNAL(clicked(bool)),
 185                         this, SLOT(on_view_close_clicked()));
 186
 187                 if (type == views::ViewTypeTrace) {
 188                         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 189                                 qobject_cast<views::ViewBase*>(v.get()),
 190                                 SLOT(trigger_event(util::Timestamp)));
 191
 192                         v->enable_sticky_scrolling(true);
 193                         v->enable_coloured_bg(true);
 194
 195                         shared_ptr<MainBar> main_bar = session.main_bar();
 196                         if (!main_bar) {
 197                                 /* Initial view, create the main bar */
 198                                 main_bar = make_shared<MainBar>(session, this, v.get());
 199                                 dock_main->addToolBar(main_bar.get());
 200                                 session.set_main_bar(main_bar);
 201
 202                                 connect(main_bar.get(), SIGNAL(new_view(Session*)),
 203                                         this, SLOT(on_new_view(Session*)));
 204
 205                                 main_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 206
 207                                 /* For the main view we need to prevent the dock widget from
 208                                  * closing itself when its close button is clicked. This is
 209                                  * so we can confirm with the user first. Regular views don't
 210                                  * need this */
 211                                 close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 212                         } else {
 213                                 /* Additional view, create a standard bar */
 214                                 pv::views::trace::StandardBar *standard_bar =
 215                                         new pv::views::trace::StandardBar(session, this, v.get());
 216                                 dock_main->addToolBar(standard_bar);
 217
 218                                 standard_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 219                         }
 220                 }
 221
 222                 return v;
 223         }
 224
 225         return nullptr;
 226 }
 227
 228 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 229 {
 230         for (shared_ptr<Session> session : sessions_) {
 231                 if (!session->has_view(view))
 232                         continue;
 233
 234                 // Find the dock the view is contained in and remove it
 235                 for (auto entry : view_docks_)
 236                         if (entry.second == view) {
 237                                 // Remove the view from the session
 238                                 session->deregister_view(view);
 239
 240                                 // Remove the view from its parent; otherwise, Qt will
 241                                 // call deleteLater() on it, which causes a double free
 242                                 // since the shared_ptr in view_docks_ doesn't know
 243                                 // that Qt keeps a pointer to the view around
 244                                 view->setParent(0);
 245
 246                                 // Delete the view's dock widget and all widgets inside it
 247                                 entry.first->deleteLater();
 248
 249                                 // Remove the dock widget from the list and stop iterating
 250                                 view_docks_.erase(entry.first);
 251                                 break;
 252                         }
 253         }
 254 }
 255
 256 shared_ptr<Session> MainWindow::add_session()
 257 {
 258         static int last_session_id = 1;
 259         QString name = tr("Session %1").arg(last_session_id++);
 260
 261         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 262
 263         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 264                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 265         connect(session.get(), SIGNAL(name_changed()),
 266                 this, SLOT(on_session_name_changed()));
 267         session_state_mapper_.setMapping(session.get(), session.get());
 268         connect(session.get(), SIGNAL(capture_state_changed(int)),
 269                 &session_state_mapper_, SLOT(map()));
 270
 271         sessions_.push_back(session);
 272
 273         QMainWindow *window = new QMainWindow();
 274         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 275         session_windows_[session] = window;
 276
 277         int index = session_selector_.addTab(window, name);
 278         session_selector_.setCurrentIndex(index);
 279         last_focused_session_ = session;
 280
 281         window->setDockNestingEnabled(true);
 282
 283         shared_ptr<views::ViewBase> main_view =
 284                 add_view(name, views::ViewTypeTrace, *session);
 285
 286         return session;
 287 }
 288
 289 void MainWindow::remove_session(shared_ptr<Session> session)
 290 {
 291         int h = new_session_button_->height();
 292
 293         for (shared_ptr<views::ViewBase> view : session->views())
 294                 remove_view(view);
 295
 296         QMainWindow *window = session_windows_.at(session);
 297         session_selector_.removeTab(session_selector_.indexOf(window));
 298
 299         session_windows_.erase(session);
 300
 301         if (last_focused_session_ == session)
 302                 last_focused_session_.reset();
 303
 304         sessions_.remove_if([&](shared_ptr<Session> s) {
 305                 return s == session; });
 306
 307         if (sessions_.empty()) {
 308                 // When there are no more tabs, the height of the QTabWidget
 309                 // drops to zero. We must prevent this to keep the static
 310                 // widgets visible
 311                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 312                         w->setMinimumHeight(h);
 313
 314                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 315                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 316                 session_selector_.setMinimumHeight(h + 2 * margin);
 317
 318                 // Update the window title if there is no view left to
 319                 // generate focus change events
 320                 setWindowTitle(WindowTitle);
 321         }
 322 }
 323
 324 void MainWindow::setup_ui()
 325 {
 326         setObjectName(QString::fromUtf8("MainWindow"));
 327
 328         setCentralWidget(&session_selector_);
 329
 330         // Set the window icon
 331         QIcon icon;
 332         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 333         setWindowIcon(icon);
 334
 335         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 336         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 337
 338         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 339         view_coloured_bg_shortcut_->setAutoRepeat(false);
 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_->setToolTip(tr("Start/Stop Acquisition"));
 355
 356         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 357         run_stop_shortcut_->setAutoRepeat(false);
 358
 359         settings_button_ = new QToolButton();
 360         settings_button_->setIcon(QIcon::fromTheme("configure",
 361                 QIcon(":/icons/configure.png")));
 362         settings_button_->setToolTip(tr("Settings"));
 363         settings_button_->setAutoRaise(true);
 364
 365         QFrame *separator1 = new QFrame();
 366         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 367         QFrame *separator2 = new QFrame();
 368         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 369
 370         QHBoxLayout* layout = new QHBoxLayout();
 371         layout->setContentsMargins(2, 2, 2, 2);
 372         layout->addWidget(new_session_button_);
 373         layout->addWidget(separator1);
 374         layout->addWidget(run_stop_button_);
 375         layout->addWidget(separator2);
 376         layout->addWidget(settings_button_);
 377
 378         static_tab_widget_ = new QWidget();
 379         static_tab_widget_->setLayout(layout);
 380
 381         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 382         session_selector_.setTabsClosable(true);
 383
 384         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 385         close_application_shortcut_->setAutoRepeat(false);
 386
 387         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 388
 389         connect(new_session_button_, SIGNAL(clicked(bool)),
 390                 this, SLOT(on_new_session_clicked()));
 391         connect(run_stop_button_, SIGNAL(clicked(bool)),
 392                 this, SLOT(on_run_stop_clicked()));
 393         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 394                 this, SLOT(on_capture_state_changed(QObject*)));
 395
 396         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 397                 this, SLOT(on_tab_close_requested(int)));
 398         connect(&session_selector_, SIGNAL(currentChanged(int)),
 399                 this, SLOT(on_tab_changed(int)));
 400
 401
 402         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 403                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 404                 this, SLOT(on_focus_changed()));
 405 }
 406
 407 void MainWindow::save_ui_settings()
 408 {
 409         QSettings settings;
 410         int id = 0;
 411
 412         settings.beginGroup("MainWindow");
 413         settings.setValue("state", saveState());
 414         settings.setValue("geometry", saveGeometry());
 415         settings.endGroup();
 416
 417         for (shared_ptr<Session> session : sessions_) {
 418                 // Ignore sessions using the demo device or no device at all
 419                 if (session->device()) {
 420                         shared_ptr<devices::HardwareDevice> device =
 421                                 dynamic_pointer_cast< devices::HardwareDevice >
 422                                 (session->device());
 423
 424                         if (device &&
 425                                 device->hardware_device()->driver()->name() == "demo")
 426                                 continue;
 427
 428                         settings.beginGroup("Session" + QString::number(id++));
 429                         settings.remove("");  // Remove all keys in this group
 430                         session->save_settings(settings);
 431                         settings.endGroup();
 432                 }
 433         }
 434
 435         settings.setValue("sessions", id);
 436 }
 437
 438 void MainWindow::restore_ui_settings()
 439 {
 440         QSettings settings;
 441         int i, session_count;
 442
 443         settings.beginGroup("MainWindow");
 444
 445         if (settings.contains("geometry")) {
 446                 restoreGeometry(settings.value("geometry").toByteArray());
 447                 restoreState(settings.value("state").toByteArray());
 448         } else
 449                 resize(1000, 720);
 450
 451         settings.endGroup();
 452
 453         session_count = settings.value("sessions", 0).toInt();
 454
 455         for (i = 0; i < session_count; i++) {
 456                 settings.beginGroup("Session" + QString::number(i));
 457                 shared_ptr<Session> session = add_session();
 458                 session->restore_settings(settings);
 459                 settings.endGroup();
 460         }
 461 }
 462
 463 std::shared_ptr<Session> MainWindow::get_tab_session(int index) const
 464 {
 465         // Find the session that belongs to the tab's main window
 466         for (auto entry : session_windows_)
 467                 if (entry.second == session_selector_.widget(index))
 468                         return entry.first;
 469
 470         return nullptr;
 471 }
 472
 473 void MainWindow::closeEvent(QCloseEvent *event)
 474 {
 475         bool data_saved = true;
 476
 477         for (auto entry : session_windows_)
 478                 if (!entry.first->data_saved())
 479                         data_saved = false;
 480
 481         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 482                 tr("There is unsaved data. Close anyway?"),
 483                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 484                 event->ignore();
 485         } else {
 486                 save_ui_settings();
 487                 event->accept();
 488         }
 489 }
 490
 491 QMenu* MainWindow::createPopupMenu()
 492 {
 493         return nullptr;
 494 }
 495
 496 bool MainWindow::restoreState(const QByteArray &state, int version)
 497 {
 498         (void)state;
 499         (void)version;
 500
 501         // Do nothing. We don't want Qt to handle this, or else it
 502         // will try to restore all the dock widgets and create havoc.
 503
 504         return false;
 505 }
 506
 507 void MainWindow::session_error(const QString text, const QString info_text)
 508 {
 509         QMetaObject::invokeMethod(this, "show_session_error",
 510                 Qt::QueuedConnection, Q_ARG(QString, text),
 511                 Q_ARG(QString, info_text));
 512 }
 513
 514 void MainWindow::show_session_error(const QString text, const QString info_text)
 515 {
 516         QMessageBox msg(this);
 517         msg.setText(text);
 518         msg.setInformativeText(info_text);
 519         msg.setStandardButtons(QMessageBox::Ok);
 520         msg.setIcon(QMessageBox::Warning);
 521         msg.exec();
 522 }
 523
 524 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 525         Session *session)
 526 {
 527         // We get a pointer and need a reference
 528         for (std::shared_ptr<Session> s : sessions_)
 529                 if (s.get() == session)
 530                         add_view(title, type, *s);
 531 }
 532
 533 void MainWindow::on_focus_changed()
 534 {
 535         shared_ptr<views::ViewBase> view = get_active_view();
 536
 537         if (view) {
 538                 for (shared_ptr<Session> session : sessions_) {
 539                         if (session->has_view(view)) {
 540                                 if (session != last_focused_session_) {
 541                                         // Activate correct tab if necessary
 542                                         shared_ptr<Session> tab_session = get_tab_session(
 543                                                 session_selector_.currentIndex());
 544                                         if (tab_session != session)
 545                                                 session_selector_.setCurrentWidget(
 546                                                         session_windows_.at(session));
 547
 548                                         on_focused_session_changed(session);
 549                                 }
 550
 551                                 break;
 552                         }
 553                 }
 554         }
 555
 556         if (sessions_.empty())
 557                 setWindowTitle(WindowTitle);
 558 }
 559
 560 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 561 {
 562         last_focused_session_ = session;
 563
 564         setWindowTitle(session->name() + " - " + WindowTitle);
 565
 566         // Update the state of the run/stop button, too
 567         on_capture_state_changed(session.get());
 568 }
 569
 570 void MainWindow::on_new_session_clicked()
 571 {
 572         add_session();
 573 }
 574
 575 void MainWindow::on_run_stop_clicked()
 576 {
 577         shared_ptr<Session> session = last_focused_session_;
 578
 579         if (!session)
 580                 return;
 581
 582         switch (session->get_capture_state()) {
 583         case Session::Stopped:
 584                 session->start_capture([&](QString message) {
 585                         session_error("Capture failed", message); });
 586                 break;
 587         case Session::AwaitingTrigger:
 588         case Session::Running:
 589                 session->stop_capture();
 590                 break;
 591         }
 592 }
 593
 594 void MainWindow::on_session_name_changed()
 595 {
 596         // Update the corresponding dock widget's name(s)
 597         Session *session = qobject_cast<Session*>(QObject::sender());
 598         assert(session);
 599
 600         for (shared_ptr<views::ViewBase> view : session->views()) {
 601                 // Get the dock that contains the view
 602                 for (auto entry : view_docks_)
 603                         if (entry.second == view) {
 604                                 entry.first->setObjectName(session->name());
 605                                 entry.first->setWindowTitle(session->name());
 606                         }
 607         }
 608
 609         // Update the tab widget by finding the main window and the tab from that
 610         for (auto entry : session_windows_)
 611                 if (entry.first.get() == session) {
 612                         QMainWindow *window = entry.second;
 613                         const int index = session_selector_.indexOf(window);
 614                         session_selector_.setTabText(index, session->name());
 615                 }
 616
 617         // Refresh window title if the affected session has focus
 618         if (session == last_focused_session_.get())
 619                 setWindowTitle(session->name() + " - " + WindowTitle);
 620 }
 621
 622 void MainWindow::on_capture_state_changed(QObject *obj)
 623 {
 624         Session *caller = qobject_cast<Session*>(obj);
 625
 626         // Ignore if caller is not the currently focused session
 627         // unless there is only one session
 628         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 629                 return;
 630
 631         int state = caller->get_capture_state();
 632
 633         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 634         run_stop_button_->setIcon(*icons[state]);
 635         run_stop_button_->setText((state == pv::Session::Stopped) ?
 636                 tr("Run") : tr("Stop"));
 637 }
 638
 639 void MainWindow::on_new_view(Session *session)
 640 {
 641         // We get a pointer and need a reference
 642         for (std::shared_ptr<Session> s : sessions_)
 643                 if (s.get() == session)
 644                         add_view(session->name(), views::ViewTypeTrace, *s);
 645 }
 646
 647 void MainWindow::on_view_close_clicked()
 648 {
 649         // Find the dock widget that contains the close button that was clicked
 650         QObject *w = QObject::sender();
 651         QDockWidget *dock = 0;
 652
 653         while (w) {
 654             dock = qobject_cast<QDockWidget*>(w);
 655             if (dock)
 656                 break;
 657             w = w->parent();
 658         }
 659
 660         // Get the view contained in the dock widget
 661         shared_ptr<views::ViewBase> view;
 662
 663         for (auto entry : view_docks_)
 664                 if (entry.first == dock)
 665                         view = entry.second;
 666
 667         // Deregister the view
 668         for (shared_ptr<Session> session : sessions_) {
 669                 if (!session->has_view(view))
 670                         continue;
 671
 672                 // Also destroy the entire session if its main view is closing...
 673                 if (view == session->main_view()) {
 674                         // ...but only if data is saved or the user confirms closing
 675                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 676                                 tr("This session contains unsaved data. Close it anyway?"),
 677                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 678                                 remove_session(session);
 679                         break;
 680                 } else
 681                         // All other views can be closed at any time as no data will be lost
 682                         remove_view(view);
 683         }
 684 }
 685
 686 void MainWindow::on_tab_changed(int index)
 687 {
 688         shared_ptr<Session> session = get_tab_session(index);
 689
 690         if (session)
 691                 on_focused_session_changed(session);
 692 }
 693
 694 void MainWindow::on_tab_close_requested(int index)
 695 {
 696         shared_ptr<Session> session = get_tab_session(index);
 697
 698         assert(session);
 699
 700         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 701                 tr("This session contains unsaved data. Close it anyway?"),
 702                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 703                 remove_session(session);
 704 }
 705
 706 void MainWindow::on_view_sticky_scrolling_shortcut()
 707 {
 708         shared_ptr<views::ViewBase> viewbase = get_active_view();
 709         views::TraceView::View* view =
 710                 qobject_cast<views::TraceView::View*>(viewbase.get());
 711         if (view)
 712                 view->toggle_sticky_scrolling();
 713 }
 714
 715 void MainWindow::on_view_coloured_bg_shortcut()
 716 {
 717         shared_ptr<views::ViewBase> viewbase = get_active_view();
 718         views::TraceView::View* view =
 719                         qobject_cast<views::TraceView::View*>(viewbase.get());
 720         if (view)
 721                 view->toggle_coloured_bg();
 722 }
 723
 724 void MainWindow::on_actionAbout_triggered()
 725 {
 726         dialogs::About dlg(device_manager_.context(), this);
 727         dlg.exec();
 728 }
 729
 730 void MainWindow::on_close_current_tab()
 731 {
 732         int tab = session_selector_.currentIndex();
 733
 734         on_tab_close_requested(tab);
 735 }
 736
 737 } // namespace pv