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