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 "globalsettings.hpp"
  43 #include "util.hpp"
  44 #include "devices/hardwaredevice.hpp"
  45 #include "dialogs/about.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 <stdint.h>
  52 #include <stdarg.h>
  53 #include <libsigrokcxx/libsigrokcxx.hpp>
  54
  55 using std::dynamic_pointer_cast;
  56 using std::list;
  57 using std::make_shared;
  58 using std::map;
  59 using std::shared_ptr;
  60 using std::string;
  61
  62 namespace pv {
  63
  64 namespace view {
  65 class ViewItem;
  66 }
  67
  68 using toolbars::MainBar;
  69
  70 using std::bind;
  71 using std::placeholders::_1;
  72
  73 const QString MainWindow::WindowTitle = tr("PulseView");
  74
  75 MainWindow::MainWindow(DeviceManager &device_manager,
  76         string open_file_name, string open_file_format,
  77         QWidget *parent) :
  78         QMainWindow(parent),
  79         device_manager_(device_manager),
  80         session_selector_(this),
  81         session_state_mapper_(this),
  82         action_about_(new QAction(this)),
  83         icon_red_(":/icons/status-red.svg"),
  84         icon_green_(":/icons/status-green.svg"),
  85         icon_grey_(":/icons/status-grey.svg")
  86 {
  87         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  88         qRegisterMetaType<uint64_t>("uint64_t");
  89
  90         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ColouredBG,
  91                 bind(&MainWindow::on_settingViewColouredBg_changed, this, _1));
  92
  93         setup_ui();
  94         restore_ui_settings();
  95
  96         if (!open_file_name.empty()) {
  97                 shared_ptr<Session> session = add_session();
  98                 session->load_init_file(open_file_name, open_file_format);
  99         }
 100
 101         // Add empty default session if there aren't any sessions
 102         if (sessions_.size() == 0) {
 103                 shared_ptr<Session> session = add_session();
 104
 105                 map<string, string> dev_info;
 106                 shared_ptr<devices::HardwareDevice> other_device, demo_device;
 107
 108                 // Use any available device that's not demo
 109                 for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
 110                         if (dev->hardware_device()->driver()->name() == "demo") {
 111                                 demo_device = dev;
 112                         } else {
 113                                 other_device = dev;
 114                         }
 115                 }
 116
 117                 // ...and if there isn't any, just use demo then
 118                 session->select_device(other_device ? other_device : demo_device);
 119         }
 120 }
 121
 122 MainWindow::~MainWindow()
 123 {
 124         while (!sessions_.empty())
 125                 remove_session(sessions_.front());
 126 }
 127
 128 QAction* MainWindow::action_about() const
 129 {
 130         return action_about_;
 131 }
 132
 133 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 134 {
 135         // If there's only one view, use it...
 136         if (view_docks_.size() == 1)
 137                 return view_docks_.begin()->second;
 138
 139         // ...otherwise find the dock widget the widget with focus is contained in
 140         QObject *w = QApplication::focusWidget();
 141         QDockWidget *dock = 0;
 142
 143         while (w) {
 144             dock = qobject_cast<QDockWidget*>(w);
 145             if (dock)
 146                 break;
 147             w = w->parent();
 148         }
 149
 150         // Get the view contained in the dock widget
 151         for (auto entry : view_docks_)
 152                 if (entry.first == dock)
 153                         return entry.second;
 154
 155         return nullptr;
 156 }
 157
 158 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 159         views::ViewType type, Session &session)
 160 {
 161         GlobalSettings settings;
 162         shared_ptr<views::ViewBase> v;
 163
 164         QMainWindow *main_window = nullptr;
 165         for (auto entry : session_windows_)
 166                 if (entry.first.get() == &session)
 167                         main_window = entry.second;
 168
 169         assert(main_window);
 170
 171         QDockWidget* dock = new QDockWidget(title, main_window);
 172         dock->setObjectName(title);
 173         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 174
 175         // Insert a QMainWindow into the dock widget to allow for a tool bar
 176         QMainWindow *dock_main = new QMainWindow(dock);
 177         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 178
 179         if (type == views::ViewTypeTrace)
 180                 v =     make_shared<views::TraceView::View>(session, dock_main);
 181
 182         if (!v)
 183                 return nullptr;
 184
 185         view_docks_[dock] = v;
 186         session.register_view(v);
 187
 188         dock_main->setCentralWidget(v.get());
 189         dock->setWidget(dock_main);
 190
 191         dock->setFeatures(QDockWidget::DockWidgetMovable |
 192                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 193
 194         QAbstractButton *close_btn =
 195                 dock->findChildren<QAbstractButton*>
 196                         ("qt_dockwidget_closebutton").front();
 197
 198         connect(close_btn, SIGNAL(clicked(bool)),
 199                 this, SLOT(on_view_close_clicked()));
 200
 201         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 202                 qobject_cast<views::ViewBase*>(v.get()),
 203                 SLOT(trigger_event(util::Timestamp)));
 204
 205         if (type == views::ViewTypeTrace) {
 206                 views::TraceView::View *tv =
 207                         qobject_cast<views::TraceView::View*>(v.get());
 208
 209                 tv->enable_sticky_scrolling(true);
 210                 tv->enable_coloured_bg(settings.value(GlobalSettings::Key_View_ColouredBG).toBool());
 211
 212                 shared_ptr<MainBar> main_bar = session.main_bar();
 213                 if (!main_bar) {
 214                         /* Initial view, create the main bar */
 215                         main_bar = make_shared<MainBar>(session, this, tv);
 216                         dock_main->addToolBar(main_bar.get());
 217                         session.set_main_bar(main_bar);
 218
 219                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 220                                 this, SLOT(on_new_view(Session*)));
 221
 222                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 223
 224                         /* For the main view we need to prevent the dock widget from
 225                          * closing itself when its close button is clicked. This is
 226                          * so we can confirm with the user first. Regular views don't
 227                          * need this */
 228                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 229                 } else {
 230                         /* Additional view, create a standard bar */
 231                         pv::views::trace::StandardBar *standard_bar =
 232                                 new pv::views::trace::StandardBar(session, this, tv);
 233                         dock_main->addToolBar(standard_bar);
 234
 235                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 236                 }
 237         }
 238
 239         return v;
 240 }
 241
 242 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 243 {
 244         for (shared_ptr<Session> session : sessions_) {
 245                 if (!session->has_view(view))
 246                         continue;
 247
 248                 // Find the dock the view is contained in and remove it
 249                 for (auto entry : view_docks_)
 250                         if (entry.second == view) {
 251                                 // Remove the view from the session
 252                                 session->deregister_view(view);
 253
 254                                 // Remove the view from its parent; otherwise, Qt will
 255                                 // call deleteLater() on it, which causes a double free
 256                                 // since the shared_ptr in view_docks_ doesn't know
 257                                 // that Qt keeps a pointer to the view around
 258                                 view->setParent(0);
 259
 260                                 // Delete the view's dock widget and all widgets inside it
 261                                 entry.first->deleteLater();
 262
 263                                 // Remove the dock widget from the list and stop iterating
 264                                 view_docks_.erase(entry.first);
 265                                 break;
 266                         }
 267         }
 268 }
 269
 270 shared_ptr<Session> MainWindow::add_session()
 271 {
 272         static int last_session_id = 1;
 273         QString name = tr("Session %1").arg(last_session_id++);
 274
 275         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 276
 277         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 278                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 279         connect(session.get(), SIGNAL(name_changed()),
 280                 this, SLOT(on_session_name_changed()));
 281         session_state_mapper_.setMapping(session.get(), session.get());
 282         connect(session.get(), SIGNAL(capture_state_changed(int)),
 283                 &session_state_mapper_, SLOT(map()));
 284
 285         sessions_.push_back(session);
 286
 287         QMainWindow *window = new QMainWindow();
 288         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 289         session_windows_[session] = window;
 290
 291         int index = session_selector_.addTab(window, name);
 292         session_selector_.setCurrentIndex(index);
 293         last_focused_session_ = session;
 294
 295         window->setDockNestingEnabled(true);
 296
 297         shared_ptr<views::ViewBase> main_view =
 298                 add_view(name, views::ViewTypeTrace, *session);
 299
 300         return session;
 301 }
 302
 303 void MainWindow::remove_session(shared_ptr<Session> session)
 304 {
 305         int h = new_session_button_->height();
 306
 307         for (shared_ptr<views::ViewBase> view : session->views())
 308                 remove_view(view);
 309
 310         QMainWindow *window = session_windows_.at(session);
 311         session_selector_.removeTab(session_selector_.indexOf(window));
 312
 313         session_windows_.erase(session);
 314
 315         if (last_focused_session_ == session)
 316                 last_focused_session_.reset();
 317
 318         sessions_.remove_if([&](shared_ptr<Session> s) {
 319                 return s == session; });
 320
 321         if (sessions_.empty()) {
 322                 // When there are no more tabs, the height of the QTabWidget
 323                 // drops to zero. We must prevent this to keep the static
 324                 // widgets visible
 325                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 326                         w->setMinimumHeight(h);
 327
 328                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 329                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 330                 session_selector_.setMinimumHeight(h + 2 * margin);
 331
 332                 // Update the window title if there is no view left to
 333                 // generate focus change events
 334                 setWindowTitle(WindowTitle);
 335         }
 336 }
 337
 338 void MainWindow::setup_ui()
 339 {
 340         setObjectName(QString::fromUtf8("MainWindow"));
 341
 342         setCentralWidget(&session_selector_);
 343
 344         // Set the window icon
 345         QIcon icon;
 346         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 347         setWindowIcon(icon);
 348
 349         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 350         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 351
 352         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 353         view_coloured_bg_shortcut_->setAutoRepeat(false);
 354
 355         action_about_->setObjectName(QString::fromUtf8("actionAbout"));
 356         action_about_->setToolTip(tr("&About..."));
 357
 358         // Set up the tab area
 359         new_session_button_ = new QToolButton();
 360         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 361                 QIcon(":/icons/document-new.png")));
 362         new_session_button_->setToolTip(tr("Create New Session"));
 363         new_session_button_->setAutoRaise(true);
 364
 365         run_stop_button_ = new QToolButton();
 366         run_stop_button_->setAutoRaise(true);
 367         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 368         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 369
 370         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 371         run_stop_shortcut_->setAutoRepeat(false);
 372
 373         settings_button_ = new QToolButton();
 374         settings_button_->setIcon(QIcon::fromTheme("configure",
 375                 QIcon(":/icons/configure.png")));
 376         settings_button_->setToolTip(tr("Settings"));
 377         settings_button_->setAutoRaise(true);
 378
 379         QFrame *separator1 = new QFrame();
 380         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 381         QFrame *separator2 = new QFrame();
 382         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 383
 384         QHBoxLayout* layout = new QHBoxLayout();
 385         layout->setContentsMargins(2, 2, 2, 2);
 386         layout->addWidget(new_session_button_);
 387         layout->addWidget(separator1);
 388         layout->addWidget(run_stop_button_);
 389         layout->addWidget(separator2);
 390         layout->addWidget(settings_button_);
 391
 392         static_tab_widget_ = new QWidget();
 393         static_tab_widget_->setLayout(layout);
 394
 395         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 396         session_selector_.setTabsClosable(true);
 397
 398         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 399         close_application_shortcut_->setAutoRepeat(false);
 400
 401         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 402
 403         connect(new_session_button_, SIGNAL(clicked(bool)),
 404                 this, SLOT(on_new_session_clicked()));
 405         connect(run_stop_button_, SIGNAL(clicked(bool)),
 406                 this, SLOT(on_run_stop_clicked()));
 407         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 408                 this, SLOT(on_capture_state_changed(QObject*)));
 409         connect(settings_button_, SIGNAL(clicked(bool)),
 410                 this, SLOT(on_settings_clicked()));
 411
 412         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 413                 this, SLOT(on_tab_close_requested(int)));
 414         connect(&session_selector_, SIGNAL(currentChanged(int)),
 415                 this, SLOT(on_tab_changed(int)));
 416
 417
 418         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 419                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 420                 this, SLOT(on_focus_changed()));
 421 }
 422
 423 void MainWindow::save_ui_settings()
 424 {
 425         QSettings settings;
 426         int id = 0;
 427
 428         settings.beginGroup("MainWindow");
 429         settings.setValue("state", saveState());
 430         settings.setValue("geometry", saveGeometry());
 431         settings.endGroup();
 432
 433         for (shared_ptr<Session> session : sessions_) {
 434                 // Ignore sessions using the demo device or no device at all
 435                 if (session->device()) {
 436                         shared_ptr<devices::HardwareDevice> device =
 437                                 dynamic_pointer_cast< devices::HardwareDevice >
 438                                 (session->device());
 439
 440                         if (device &&
 441                                 device->hardware_device()->driver()->name() == "demo")
 442                                 continue;
 443
 444                         settings.beginGroup("Session" + QString::number(id++));
 445                         settings.remove("");  // Remove all keys in this group
 446                         session->save_settings(settings);
 447                         settings.endGroup();
 448                 }
 449         }
 450
 451         settings.setValue("sessions", id);
 452 }
 453
 454 void MainWindow::restore_ui_settings()
 455 {
 456         QSettings settings;
 457         int i, session_count;
 458
 459         settings.beginGroup("MainWindow");
 460
 461         if (settings.contains("geometry")) {
 462                 restoreGeometry(settings.value("geometry").toByteArray());
 463                 restoreState(settings.value("state").toByteArray());
 464         } else
 465                 resize(1000, 720);
 466
 467         settings.endGroup();
 468
 469         session_count = settings.value("sessions", 0).toInt();
 470
 471         for (i = 0; i < session_count; i++) {
 472                 settings.beginGroup("Session" + QString::number(i));
 473                 shared_ptr<Session> session = add_session();
 474                 session->restore_settings(settings);
 475                 settings.endGroup();
 476         }
 477 }
 478
 479 std::shared_ptr<Session> MainWindow::get_tab_session(int index) const
 480 {
 481         // Find the session that belongs to the tab's main window
 482         for (auto entry : session_windows_)
 483                 if (entry.second == session_selector_.widget(index))
 484                         return entry.first;
 485
 486         return nullptr;
 487 }
 488
 489 void MainWindow::closeEvent(QCloseEvent *event)
 490 {
 491         bool data_saved = true;
 492
 493         for (auto entry : session_windows_)
 494                 if (!entry.first->data_saved())
 495                         data_saved = false;
 496
 497         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 498                 tr("There is unsaved data. Close anyway?"),
 499                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 500                 event->ignore();
 501         } else {
 502                 save_ui_settings();
 503                 event->accept();
 504         }
 505 }
 506
 507 QMenu* MainWindow::createPopupMenu()
 508 {
 509         return nullptr;
 510 }
 511
 512 bool MainWindow::restoreState(const QByteArray &state, int version)
 513 {
 514         (void)state;
 515         (void)version;
 516
 517         // Do nothing. We don't want Qt to handle this, or else it
 518         // will try to restore all the dock widgets and create havoc.
 519
 520         return false;
 521 }
 522
 523 void MainWindow::session_error(const QString text, const QString info_text)
 524 {
 525         QMetaObject::invokeMethod(this, "show_session_error",
 526                 Qt::QueuedConnection, Q_ARG(QString, text),
 527                 Q_ARG(QString, info_text));
 528 }
 529
 530 void MainWindow::show_session_error(const QString text, const QString info_text)
 531 {
 532         QMessageBox msg(this);
 533         msg.setText(text);
 534         msg.setInformativeText(info_text);
 535         msg.setStandardButtons(QMessageBox::Ok);
 536         msg.setIcon(QMessageBox::Warning);
 537         msg.exec();
 538 }
 539
 540 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 541         Session *session)
 542 {
 543         // We get a pointer and need a reference
 544         for (std::shared_ptr<Session> s : sessions_)
 545                 if (s.get() == session)
 546                         add_view(title, type, *s);
 547 }
 548
 549 void MainWindow::on_focus_changed()
 550 {
 551         shared_ptr<views::ViewBase> view = get_active_view();
 552
 553         if (view) {
 554                 for (shared_ptr<Session> session : sessions_) {
 555                         if (session->has_view(view)) {
 556                                 if (session != last_focused_session_) {
 557                                         // Activate correct tab if necessary
 558                                         shared_ptr<Session> tab_session = get_tab_session(
 559                                                 session_selector_.currentIndex());
 560                                         if (tab_session != session)
 561                                                 session_selector_.setCurrentWidget(
 562                                                         session_windows_.at(session));
 563
 564                                         on_focused_session_changed(session);
 565                                 }
 566
 567                                 break;
 568                         }
 569                 }
 570         }
 571
 572         if (sessions_.empty())
 573                 setWindowTitle(WindowTitle);
 574 }
 575
 576 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 577 {
 578         last_focused_session_ = session;
 579
 580         setWindowTitle(session->name() + " - " + WindowTitle);
 581
 582         // Update the state of the run/stop button, too
 583         on_capture_state_changed(session.get());
 584 }
 585
 586 void MainWindow::on_new_session_clicked()
 587 {
 588         add_session();
 589 }
 590
 591 void MainWindow::on_run_stop_clicked()
 592 {
 593         shared_ptr<Session> session = last_focused_session_;
 594
 595         if (!session)
 596                 return;
 597
 598         switch (session->get_capture_state()) {
 599         case Session::Stopped:
 600                 session->start_capture([&](QString message) {
 601                         session_error("Capture failed", message); });
 602                 break;
 603         case Session::AwaitingTrigger:
 604         case Session::Running:
 605                 session->stop_capture();
 606                 break;
 607         }
 608 }
 609
 610 void MainWindow::on_settings_clicked()
 611 {
 612         dialogs::Settings dlg;
 613         dlg.exec();
 614 }
 615
 616 void MainWindow::on_session_name_changed()
 617 {
 618         // Update the corresponding dock widget's name(s)
 619         Session *session = qobject_cast<Session*>(QObject::sender());
 620         assert(session);
 621
 622         for (shared_ptr<views::ViewBase> view : session->views()) {
 623                 // Get the dock that contains the view
 624                 for (auto entry : view_docks_)
 625                         if (entry.second == view) {
 626                                 entry.first->setObjectName(session->name());
 627                                 entry.first->setWindowTitle(session->name());
 628                         }
 629         }
 630
 631         // Update the tab widget by finding the main window and the tab from that
 632         for (auto entry : session_windows_)
 633                 if (entry.first.get() == session) {
 634                         QMainWindow *window = entry.second;
 635                         const int index = session_selector_.indexOf(window);
 636                         session_selector_.setTabText(index, session->name());
 637                 }
 638
 639         // Refresh window title if the affected session has focus
 640         if (session == last_focused_session_.get())
 641                 setWindowTitle(session->name() + " - " + WindowTitle);
 642 }
 643
 644 void MainWindow::on_capture_state_changed(QObject *obj)
 645 {
 646         Session *caller = qobject_cast<Session*>(obj);
 647
 648         // Ignore if caller is not the currently focused session
 649         // unless there is only one session
 650         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 651                 return;
 652
 653         int state = caller->get_capture_state();
 654
 655         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 656         run_stop_button_->setIcon(*icons[state]);
 657         run_stop_button_->setText((state == pv::Session::Stopped) ?
 658                 tr("Run") : tr("Stop"));
 659 }
 660
 661 void MainWindow::on_new_view(Session *session)
 662 {
 663         // We get a pointer and need a reference
 664         for (std::shared_ptr<Session> s : sessions_)
 665                 if (s.get() == session)
 666                         add_view(session->name(), views::ViewTypeTrace, *s);
 667 }
 668
 669 void MainWindow::on_view_close_clicked()
 670 {
 671         // Find the dock widget that contains the close button that was clicked
 672         QObject *w = QObject::sender();
 673         QDockWidget *dock = 0;
 674
 675         while (w) {
 676             dock = qobject_cast<QDockWidget*>(w);
 677             if (dock)
 678                 break;
 679             w = w->parent();
 680         }
 681
 682         // Get the view contained in the dock widget
 683         shared_ptr<views::ViewBase> view;
 684
 685         for (auto entry : view_docks_)
 686                 if (entry.first == dock)
 687                         view = entry.second;
 688
 689         // Deregister the view
 690         for (shared_ptr<Session> session : sessions_) {
 691                 if (!session->has_view(view))
 692                         continue;
 693
 694                 // Also destroy the entire session if its main view is closing...
 695                 if (view == session->main_view()) {
 696                         // ...but only if data is saved or the user confirms closing
 697                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 698                                 tr("This session contains unsaved data. Close it anyway?"),
 699                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 700                                 remove_session(session);
 701                         break;
 702                 } else
 703                         // All other views can be closed at any time as no data will be lost
 704                         remove_view(view);
 705         }
 706 }
 707
 708 void MainWindow::on_tab_changed(int index)
 709 {
 710         shared_ptr<Session> session = get_tab_session(index);
 711
 712         if (session)
 713                 on_focused_session_changed(session);
 714 }
 715
 716 void MainWindow::on_tab_close_requested(int index)
 717 {
 718         shared_ptr<Session> session = get_tab_session(index);
 719
 720         assert(session);
 721
 722         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 723                 tr("This session contains unsaved data. Close it anyway?"),
 724                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 725                 remove_session(session);
 726 }
 727
 728 void MainWindow::on_view_sticky_scrolling_shortcut()
 729 {
 730         shared_ptr<views::ViewBase> viewbase = get_active_view();
 731         views::TraceView::View* view =
 732                 qobject_cast<views::TraceView::View*>(viewbase.get());
 733         if (view)
 734                 view->toggle_sticky_scrolling();
 735 }
 736
 737 void MainWindow::on_view_coloured_bg_shortcut()
 738 {
 739         GlobalSettings settings;
 740
 741         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
 742         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
 743 }
 744
 745 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
 746 {
 747         bool state = new_value.toBool();
 748
 749         for (auto entry : view_docks_) {
 750                 shared_ptr<views::ViewBase> viewbase = entry.second;
 751
 752                 // Only trace views have this setting
 753                 views::TraceView::View* view =
 754                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 755                 if (view)
 756                         view->enable_coloured_bg(state);
 757         }
 758 }
 759
 760 void MainWindow::on_actionAbout_triggered()
 761 {
 762         dialogs::About dlg(device_manager_.context(), this);
 763         dlg.exec();
 764 }
 765
 766 void MainWindow::on_close_current_tab()
 767 {
 768         int tab = session_selector_.currentIndex();
 769
 770         on_tab_close_requested(tab);
 771 }
 772
 773 } // namespace pv