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 #ifdef ENABLE_DECODE
  21 #include <libsigrokdecode/libsigrokdecode.h>
  22 #endif
  23
  24 #include <cassert>
  25 #include <algorithm>
  26 #include <iterator>
  27 #include <cstdint>
  28 #include <cstdarg>
  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 #include <QShortcut>
  39
  40 #include "mainwindow.hpp"
  41
  42 #include "devicemanager.hpp"
  43 #include "globalsettings.hpp"
  44 #include "util.hpp"
  45 #include "devices/hardwaredevice.hpp"
  46 #include "dialogs/settings.hpp"
  47 #include "toolbars/mainbar.hpp"
  48 #include "view/view.hpp"
  49 #include "views/trace/standardbar.hpp"
  50
  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 using std::bind;
  69 using std::placeholders::_1;
  70
  71 const QString MainWindow::WindowTitle = tr("PulseView");
  72
  73 MainWindow::MainWindow(DeviceManager &device_manager,
  74         string open_file_name, string open_file_format,
  75         QWidget *parent) :
  76         QMainWindow(parent),
  77         device_manager_(device_manager),
  78         session_selector_(this),
  79         session_state_mapper_(this),
  80         icon_red_(":/icons/status-red.svg"),
  81         icon_green_(":/icons/status-green.svg"),
  82         icon_grey_(":/icons/status-grey.svg")
  83 {
  84         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  85         qRegisterMetaType<uint64_t>("uint64_t");
  86
  87         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ColouredBG,
  88                 bind(&MainWindow::on_settingViewColouredBg_changed, this, _1));
  89         GlobalSettings::register_change_handler(GlobalSettings::Key_View_StickyScrolling,
  90                 bind(&MainWindow::on_settingViewStickyScrolling_changed, this, _1));
  91
  92         setup_ui();
  93         restore_ui_settings();
  94
  95         if (!open_file_name.empty()) {
  96                 shared_ptr<Session> session = add_session();
  97                 session->load_init_file(open_file_name, open_file_format);
  98         }
  99
 100         // Add empty default session if there aren't any sessions
 101         if (sessions_.size() == 0) {
 102                 shared_ptr<Session> session = add_session();
 103
 104                 map<string, string> dev_info;
 105                 shared_ptr<devices::HardwareDevice> other_device, demo_device;
 106
 107                 // Use any available device that's not demo
 108                 for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
 109                         if (dev->hardware_device()->driver()->name() == "demo") {
 110                                 demo_device = dev;
 111                         } else {
 112                                 other_device = dev;
 113                         }
 114                 }
 115
 116                 // ...and if there isn't any, just use demo then
 117                 session->select_device(other_device ? other_device : demo_device);
 118         }
 119 }
 120
 121 MainWindow::~MainWindow()
 122 {
 123         while (!sessions_.empty())
 124                 remove_session(sessions_.front());
 125 }
 126
 127 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 128 {
 129         // If there's only one view, use it...
 130         if (view_docks_.size() == 1)
 131                 return view_docks_.begin()->second;
 132
 133         // ...otherwise find the dock widget the widget with focus is contained in
 134         QObject *w = QApplication::focusWidget();
 135         QDockWidget *dock = nullptr;
 136
 137         while (w) {
 138             dock = qobject_cast<QDockWidget*>(w);
 139             if (dock)
 140                 break;
 141             w = w->parent();
 142         }
 143
 144         // Get the view contained in the dock widget
 145         for (auto entry : view_docks_)
 146                 if (entry.first == dock)
 147                         return entry.second;
 148
 149         return nullptr;
 150 }
 151
 152 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 153         views::ViewType type, Session &session)
 154 {
 155         GlobalSettings settings;
 156         shared_ptr<views::ViewBase> v;
 157
 158         QMainWindow *main_window = nullptr;
 159         for (auto entry : session_windows_)
 160                 if (entry.first.get() == &session)
 161                         main_window = entry.second;
 162
 163         assert(main_window);
 164
 165         shared_ptr<MainBar> main_bar = session.main_bar();
 166
 167         QDockWidget* dock = new QDockWidget(title, main_window);
 168         dock->setObjectName(title);
 169         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 170
 171         // Insert a QMainWindow into the dock widget to allow for a tool bar
 172         QMainWindow *dock_main = new QMainWindow(dock);
 173         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 174
 175         if (type == views::ViewTypeTrace)
 176                 // This view will be the main view if there's no main bar yet
 177                 v = make_shared<views::TraceView::View>(session,
 178                         (main_bar ? false : true), dock_main);
 179
 180         if (!v)
 181                 return nullptr;
 182
 183         view_docks_[dock] = v;
 184         session.register_view(v);
 185
 186         dock_main->setCentralWidget(v.get());
 187         dock->setWidget(dock_main);
 188
 189         dock->setFeatures(QDockWidget::DockWidgetMovable |
 190                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 191
 192         QAbstractButton *close_btn =
 193                 dock->findChildren<QAbstractButton*>
 194                         ("qt_dockwidget_closebutton").front();
 195
 196         connect(close_btn, SIGNAL(clicked(bool)),
 197                 this, SLOT(on_view_close_clicked()));
 198
 199         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 200                 qobject_cast<views::ViewBase*>(v.get()),
 201                 SLOT(trigger_event(util::Timestamp)));
 202
 203         if (type == views::ViewTypeTrace) {
 204                 views::TraceView::View *tv =
 205                         qobject_cast<views::TraceView::View*>(v.get());
 206
 207                 tv->enable_sticky_scrolling(true);
 208                 tv->enable_coloured_bg(settings.value(GlobalSettings::Key_View_ColouredBG).toBool());
 209
 210                 if (!main_bar) {
 211                         /* Initial view, create the main bar */
 212                         main_bar = make_shared<MainBar>(session, this, tv);
 213                         dock_main->addToolBar(main_bar.get());
 214                         session.set_main_bar(main_bar);
 215
 216                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 217                                 this, SLOT(on_new_view(Session*)));
 218
 219                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 220
 221                         /* For the main view we need to prevent the dock widget from
 222                          * closing itself when its close button is clicked. This is
 223                          * so we can confirm with the user first. Regular views don't
 224                          * need this */
 225                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 226                 } else {
 227                         /* Additional view, create a standard bar */
 228                         pv::views::trace::StandardBar *standard_bar =
 229                                 new pv::views::trace::StandardBar(session, this, tv);
 230                         dock_main->addToolBar(standard_bar);
 231
 232                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 233                 }
 234         }
 235
 236         return v;
 237 }
 238
 239 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 240 {
 241         for (shared_ptr<Session> session : sessions_) {
 242                 if (!session->has_view(view))
 243                         continue;
 244
 245                 // Find the dock the view is contained in and remove it
 246                 for (auto entry : view_docks_)
 247                         if (entry.second == view) {
 248                                 // Remove the view from the session
 249                                 session->deregister_view(view);
 250
 251                                 // Remove the view from its parent; otherwise, Qt will
 252                                 // call deleteLater() on it, which causes a double free
 253                                 // since the shared_ptr in view_docks_ doesn't know
 254                                 // that Qt keeps a pointer to the view around
 255                                 view->setParent(nullptr);
 256
 257                                 // Delete the view's dock widget and all widgets inside it
 258                                 entry.first->deleteLater();
 259
 260                                 // Remove the dock widget from the list and stop iterating
 261                                 view_docks_.erase(entry.first);
 262                                 break;
 263                         }
 264         }
 265 }
 266
 267 shared_ptr<Session> MainWindow::add_session()
 268 {
 269         static int last_session_id = 1;
 270         QString name = tr("Session %1").arg(last_session_id++);
 271
 272         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 273
 274         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 275                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 276         connect(session.get(), SIGNAL(name_changed()),
 277                 this, SLOT(on_session_name_changed()));
 278         session_state_mapper_.setMapping(session.get(), session.get());
 279         connect(session.get(), SIGNAL(capture_state_changed(int)),
 280                 &session_state_mapper_, SLOT(map()));
 281
 282         sessions_.push_back(session);
 283
 284         QMainWindow *window = new QMainWindow();
 285         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 286         session_windows_[session] = window;
 287
 288         int index = session_selector_.addTab(window, name);
 289         session_selector_.setCurrentIndex(index);
 290         last_focused_session_ = session;
 291
 292         window->setDockNestingEnabled(true);
 293
 294         shared_ptr<views::ViewBase> main_view =
 295                 add_view(name, views::ViewTypeTrace, *session);
 296
 297         return session;
 298 }
 299
 300 void MainWindow::remove_session(shared_ptr<Session> session)
 301 {
 302         int h = new_session_button_->height();
 303
 304         for (shared_ptr<views::ViewBase> view : session->views())
 305                 remove_view(view);
 306
 307         QMainWindow *window = session_windows_.at(session);
 308         session_selector_.removeTab(session_selector_.indexOf(window));
 309
 310         session_windows_.erase(session);
 311
 312         if (last_focused_session_ == session)
 313                 last_focused_session_.reset();
 314
 315         sessions_.remove_if([&](shared_ptr<Session> s) {
 316                 return s == session; });
 317
 318         if (sessions_.empty()) {
 319                 // When there are no more tabs, the height of the QTabWidget
 320                 // drops to zero. We must prevent this to keep the static
 321                 // widgets visible
 322                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 323                         w->setMinimumHeight(h);
 324
 325                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 326                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 327                 session_selector_.setMinimumHeight(h + 2 * margin);
 328
 329                 // Update the window title if there is no view left to
 330                 // generate focus change events
 331                 setWindowTitle(WindowTitle);
 332         }
 333 }
 334
 335 void MainWindow::setup_ui()
 336 {
 337         setObjectName(QString::fromUtf8("MainWindow"));
 338
 339         setCentralWidget(&session_selector_);
 340
 341         // Set the window icon
 342         QIcon icon;
 343         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 344         setWindowIcon(icon);
 345
 346         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 347         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 348
 349         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 350         view_coloured_bg_shortcut_->setAutoRepeat(false);
 351
 352         // Set up the tab area
 353         new_session_button_ = new QToolButton();
 354         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 355                 QIcon(":/icons/document-new.png")));
 356         new_session_button_->setToolTip(tr("Create New Session"));
 357         new_session_button_->setAutoRaise(true);
 358
 359         run_stop_button_ = new QToolButton();
 360         run_stop_button_->setAutoRaise(true);
 361         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 362         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 363
 364         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 365         run_stop_shortcut_->setAutoRepeat(false);
 366
 367         settings_button_ = new QToolButton();
 368         settings_button_->setIcon(QIcon::fromTheme("configure",
 369                 QIcon(":/icons/configure.png")));
 370         settings_button_->setToolTip(tr("Settings"));
 371         settings_button_->setAutoRaise(true);
 372
 373         QFrame *separator1 = new QFrame();
 374         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 375         QFrame *separator2 = new QFrame();
 376         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 377
 378         QHBoxLayout* layout = new QHBoxLayout();
 379         layout->setContentsMargins(2, 2, 2, 2);
 380         layout->addWidget(new_session_button_);
 381         layout->addWidget(separator1);
 382         layout->addWidget(run_stop_button_);
 383         layout->addWidget(separator2);
 384         layout->addWidget(settings_button_);
 385
 386         static_tab_widget_ = new QWidget();
 387         static_tab_widget_->setLayout(layout);
 388
 389         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 390         session_selector_.setTabsClosable(true);
 391
 392         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 393         close_application_shortcut_->setAutoRepeat(false);
 394
 395         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 396
 397         connect(new_session_button_, SIGNAL(clicked(bool)),
 398                 this, SLOT(on_new_session_clicked()));
 399         connect(run_stop_button_, SIGNAL(clicked(bool)),
 400                 this, SLOT(on_run_stop_clicked()));
 401         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 402                 this, SLOT(on_capture_state_changed(QObject*)));
 403         connect(settings_button_, SIGNAL(clicked(bool)),
 404                 this, SLOT(on_settings_clicked()));
 405
 406         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 407                 this, SLOT(on_tab_close_requested(int)));
 408         connect(&session_selector_, SIGNAL(currentChanged(int)),
 409                 this, SLOT(on_tab_changed(int)));
 410
 411
 412         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 413                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 414                 this, SLOT(on_focus_changed()));
 415 }
 416
 417 void MainWindow::save_ui_settings()
 418 {
 419         QSettings settings;
 420         int id = 0;
 421
 422         settings.beginGroup("MainWindow");
 423         settings.setValue("state", saveState());
 424         settings.setValue("geometry", saveGeometry());
 425         settings.endGroup();
 426
 427         for (shared_ptr<Session> session : sessions_) {
 428                 // Ignore sessions using the demo device or no device at all
 429                 if (session->device()) {
 430                         shared_ptr<devices::HardwareDevice> device =
 431                                 dynamic_pointer_cast< devices::HardwareDevice >
 432                                 (session->device());
 433
 434                         if (device &&
 435                                 device->hardware_device()->driver()->name() == "demo")
 436                                 continue;
 437
 438                         settings.beginGroup("Session" + QString::number(id++));
 439                         settings.remove("");  // Remove all keys in this group
 440                         session->save_settings(settings);
 441                         settings.endGroup();
 442                 }
 443         }
 444
 445         settings.setValue("sessions", id);
 446 }
 447
 448 void MainWindow::restore_ui_settings()
 449 {
 450         QSettings settings;
 451         int i, session_count;
 452
 453         settings.beginGroup("MainWindow");
 454
 455         if (settings.contains("geometry")) {
 456                 restoreGeometry(settings.value("geometry").toByteArray());
 457                 restoreState(settings.value("state").toByteArray());
 458         } else
 459                 resize(1000, 720);
 460
 461         settings.endGroup();
 462
 463         session_count = settings.value("sessions", 0).toInt();
 464
 465         for (i = 0; i < session_count; i++) {
 466                 settings.beginGroup("Session" + QString::number(i));
 467                 shared_ptr<Session> session = add_session();
 468                 session->restore_settings(settings);
 469                 settings.endGroup();
 470         }
 471 }
 472
 473 std::shared_ptr<Session> MainWindow::get_tab_session(int index) const
 474 {
 475         // Find the session that belongs to the tab's main window
 476         for (auto entry : session_windows_)
 477                 if (entry.second == session_selector_.widget(index))
 478                         return entry.first;
 479
 480         return nullptr;
 481 }
 482
 483 void MainWindow::closeEvent(QCloseEvent *event)
 484 {
 485         bool data_saved = true;
 486
 487         for (auto entry : session_windows_)
 488                 if (!entry.first->data_saved())
 489                         data_saved = false;
 490
 491         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 492                 tr("There is unsaved data. Close anyway?"),
 493                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 494                 event->ignore();
 495         } else {
 496                 save_ui_settings();
 497                 event->accept();
 498         }
 499 }
 500
 501 QMenu* MainWindow::createPopupMenu()
 502 {
 503         return nullptr;
 504 }
 505
 506 bool MainWindow::restoreState(const QByteArray &state, int version)
 507 {
 508         (void)state;
 509         (void)version;
 510
 511         // Do nothing. We don't want Qt to handle this, or else it
 512         // will try to restore all the dock widgets and create havoc.
 513
 514         return false;
 515 }
 516
 517 void MainWindow::session_error(const QString text, const QString info_text)
 518 {
 519         QMetaObject::invokeMethod(this, "show_session_error",
 520                 Qt::QueuedConnection, Q_ARG(QString, text),
 521                 Q_ARG(QString, info_text));
 522 }
 523
 524 void MainWindow::show_session_error(const QString text, const QString info_text)
 525 {
 526         QMessageBox msg(this);
 527         msg.setText(text);
 528         msg.setInformativeText(info_text);
 529         msg.setStandardButtons(QMessageBox::Ok);
 530         msg.setIcon(QMessageBox::Warning);
 531         msg.exec();
 532 }
 533
 534 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 535         Session *session)
 536 {
 537         // We get a pointer and need a reference
 538         for (std::shared_ptr<Session> s : sessions_)
 539                 if (s.get() == session)
 540                         add_view(title, type, *s);
 541 }
 542
 543 void MainWindow::on_focus_changed()
 544 {
 545         shared_ptr<views::ViewBase> view = get_active_view();
 546
 547         if (view) {
 548                 for (shared_ptr<Session> session : sessions_) {
 549                         if (session->has_view(view)) {
 550                                 if (session != last_focused_session_) {
 551                                         // Activate correct tab if necessary
 552                                         shared_ptr<Session> tab_session = get_tab_session(
 553                                                 session_selector_.currentIndex());
 554                                         if (tab_session != session)
 555                                                 session_selector_.setCurrentWidget(
 556                                                         session_windows_.at(session));
 557
 558                                         on_focused_session_changed(session);
 559                                 }
 560
 561                                 break;
 562                         }
 563                 }
 564         }
 565
 566         if (sessions_.empty())
 567                 setWindowTitle(WindowTitle);
 568 }
 569
 570 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 571 {
 572         last_focused_session_ = session;
 573
 574         setWindowTitle(session->name() + " - " + WindowTitle);
 575
 576         // Update the state of the run/stop button, too
 577         on_capture_state_changed(session.get());
 578 }
 579
 580 void MainWindow::on_new_session_clicked()
 581 {
 582         add_session();
 583 }
 584
 585 void MainWindow::on_run_stop_clicked()
 586 {
 587         shared_ptr<Session> session = last_focused_session_;
 588
 589         if (!session)
 590                 return;
 591
 592         switch (session->get_capture_state()) {
 593         case Session::Stopped:
 594                 session->start_capture([&](QString message) {
 595                         session_error("Capture failed", message); });
 596                 break;
 597         case Session::AwaitingTrigger:
 598         case Session::Running:
 599                 session->stop_capture();
 600                 break;
 601         }
 602 }
 603
 604 void MainWindow::on_settings_clicked()
 605 {
 606         dialogs::Settings dlg(device_manager_);
 607         dlg.exec();
 608 }
 609
 610 void MainWindow::on_session_name_changed()
 611 {
 612         // Update the corresponding dock widget's name(s)
 613         Session *session = qobject_cast<Session*>(QObject::sender());
 614         assert(session);
 615
 616         for (shared_ptr<views::ViewBase> view : session->views()) {
 617                 // Get the dock that contains the view
 618                 for (auto entry : view_docks_)
 619                         if (entry.second == view) {
 620                                 entry.first->setObjectName(session->name());
 621                                 entry.first->setWindowTitle(session->name());
 622                         }
 623         }
 624
 625         // Update the tab widget by finding the main window and the tab from that
 626         for (auto entry : session_windows_)
 627                 if (entry.first.get() == session) {
 628                         QMainWindow *window = entry.second;
 629                         const int index = session_selector_.indexOf(window);
 630                         session_selector_.setTabText(index, session->name());
 631                 }
 632
 633         // Refresh window title if the affected session has focus
 634         if (session == last_focused_session_.get())
 635                 setWindowTitle(session->name() + " - " + WindowTitle);
 636 }
 637
 638 void MainWindow::on_capture_state_changed(QObject *obj)
 639 {
 640         Session *caller = qobject_cast<Session*>(obj);
 641
 642         // Ignore if caller is not the currently focused session
 643         // unless there is only one session
 644         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 645                 return;
 646
 647         int state = caller->get_capture_state();
 648
 649         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 650         run_stop_button_->setIcon(*icons[state]);
 651         run_stop_button_->setText((state == pv::Session::Stopped) ?
 652                 tr("Run") : tr("Stop"));
 653 }
 654
 655 void MainWindow::on_new_view(Session *session)
 656 {
 657         // We get a pointer and need a reference
 658         for (std::shared_ptr<Session> s : sessions_)
 659                 if (s.get() == session)
 660                         add_view(session->name(), views::ViewTypeTrace, *s);
 661 }
 662
 663 void MainWindow::on_view_close_clicked()
 664 {
 665         // Find the dock widget that contains the close button that was clicked
 666         QObject *w = QObject::sender();
 667         QDockWidget *dock = nullptr;
 668
 669         while (w) {
 670             dock = qobject_cast<QDockWidget*>(w);
 671             if (dock)
 672                 break;
 673             w = w->parent();
 674         }
 675
 676         // Get the view contained in the dock widget
 677         shared_ptr<views::ViewBase> view;
 678
 679         for (auto entry : view_docks_)
 680                 if (entry.first == dock)
 681                         view = entry.second;
 682
 683         // Deregister the view
 684         for (shared_ptr<Session> session : sessions_) {
 685                 if (!session->has_view(view))
 686                         continue;
 687
 688                 // Also destroy the entire session if its main view is closing...
 689                 if (view == session->main_view()) {
 690                         // ...but only if data is saved or the user confirms closing
 691                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 692                                 tr("This session contains unsaved data. Close it anyway?"),
 693                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 694                                 remove_session(session);
 695                         break;
 696                 } else
 697                         // All other views can be closed at any time as no data will be lost
 698                         remove_view(view);
 699         }
 700 }
 701
 702 void MainWindow::on_tab_changed(int index)
 703 {
 704         shared_ptr<Session> session = get_tab_session(index);
 705
 706         if (session)
 707                 on_focused_session_changed(session);
 708 }
 709
 710 void MainWindow::on_tab_close_requested(int index)
 711 {
 712         shared_ptr<Session> session = get_tab_session(index);
 713
 714         assert(session);
 715
 716         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 717                 tr("This session contains unsaved data. Close it anyway?"),
 718                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 719                 remove_session(session);
 720 }
 721
 722 void MainWindow::on_view_coloured_bg_shortcut()
 723 {
 724         GlobalSettings settings;
 725
 726         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
 727         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
 728 }
 729
 730 void MainWindow::on_view_sticky_scrolling_shortcut()
 731 {
 732         GlobalSettings settings;
 733
 734         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 735         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 736 }
 737
 738 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
 739 {
 740         bool state = new_value.toBool();
 741
 742         for (auto entry : view_docks_) {
 743                 shared_ptr<views::ViewBase> viewbase = entry.second;
 744
 745                 // Only trace views have this setting
 746                 views::TraceView::View* view =
 747                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 748                 if (view)
 749                         view->enable_coloured_bg(state);
 750         }
 751 }
 752
 753 void MainWindow::on_settingViewStickyScrolling_changed(const QVariant new_value)
 754 {
 755         bool state = new_value.toBool();
 756
 757         for (auto entry : view_docks_) {
 758                 shared_ptr<views::ViewBase> viewbase = entry.second;
 759
 760                 // Only trace views have this setting
 761                 views::TraceView::View* view =
 762                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 763                 if (view)
 764                         view->enable_sticky_scrolling(state);
 765         }
 766 }
 767
 768 void MainWindow::on_close_current_tab()
 769 {
 770         int tab = session_selector_.currentIndex();
 771
 772         on_tab_close_requested(tab);
 773 }
 774
 775 } // namespace pv