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/about.hpp"
  47 #include "dialogs/settings.hpp"
  48 #include "toolbars/mainbar.hpp"
  49 #include "view/view.hpp"
  50 #include "views/trace/standardbar.hpp"
  51
  52 #include <libsigrokcxx/libsigrokcxx.hpp>
  53
  54 using std::dynamic_pointer_cast;
  55 using std::list;
  56 using std::make_shared;
  57 using std::map;
  58 using std::shared_ptr;
  59 using std::string;
  60
  61 namespace pv {
  62
  63 namespace view {
  64 class ViewItem;
  65 }
  66
  67 using toolbars::MainBar;
  68
  69 using std::bind;
  70 using std::placeholders::_1;
  71
  72 const QString MainWindow::WindowTitle = tr("PulseView");
  73
  74 MainWindow::MainWindow(DeviceManager &device_manager,
  75         string open_file_name, string open_file_format,
  76         QWidget *parent) :
  77         QMainWindow(parent),
  78         device_manager_(device_manager),
  79         session_selector_(this),
  80         session_state_mapper_(this),
  81         action_about_(new QAction(this)),
  82         icon_red_(":/icons/status-red.svg"),
  83         icon_green_(":/icons/status-green.svg"),
  84         icon_grey_(":/icons/status-grey.svg")
  85 {
  86         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  87         qRegisterMetaType<uint64_t>("uint64_t");
  88
  89         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ColouredBG,
  90                 bind(&MainWindow::on_settingViewColouredBg_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 QAction* MainWindow::action_about() const
 128 {
 129         return action_about_;
 130 }
 131
 132 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 133 {
 134         // If there's only one view, use it...
 135         if (view_docks_.size() == 1)
 136                 return view_docks_.begin()->second;
 137
 138         // ...otherwise find the dock widget the widget with focus is contained in
 139         QObject *w = QApplication::focusWidget();
 140         QDockWidget *dock = nullptr;
 141
 142         while (w) {
 143             dock = qobject_cast<QDockWidget*>(w);
 144             if (dock)
 145                 break;
 146             w = w->parent();
 147         }
 148
 149         // Get the view contained in the dock widget
 150         for (auto entry : view_docks_)
 151                 if (entry.first == dock)
 152                         return entry.second;
 153
 154         return nullptr;
 155 }
 156
 157 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 158         views::ViewType type, Session &session)
 159 {
 160         GlobalSettings settings;
 161         shared_ptr<views::ViewBase> v;
 162
 163         QMainWindow *main_window = nullptr;
 164         for (auto entry : session_windows_)
 165                 if (entry.first.get() == &session)
 166                         main_window = entry.second;
 167
 168         assert(main_window);
 169
 170         shared_ptr<MainBar> main_bar = session.main_bar();
 171
 172         QDockWidget* dock = new QDockWidget(title, main_window);
 173         dock->setObjectName(title);
 174         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 175
 176         // Insert a QMainWindow into the dock widget to allow for a tool bar
 177         QMainWindow *dock_main = new QMainWindow(dock);
 178         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 179
 180         if (type == views::ViewTypeTrace)
 181                 // This view will be the main view if there's no main bar yet
 182                 v = make_shared<views::TraceView::View>(session,
 183                         (main_bar ? false : true), dock_main);
 184
 185         if (!v)
 186                 return nullptr;
 187
 188         view_docks_[dock] = v;
 189         session.register_view(v);
 190
 191         dock_main->setCentralWidget(v.get());
 192         dock->setWidget(dock_main);
 193
 194         dock->setFeatures(QDockWidget::DockWidgetMovable |
 195                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 196
 197         QAbstractButton *close_btn =
 198                 dock->findChildren<QAbstractButton*>
 199                         ("qt_dockwidget_closebutton").front();
 200
 201         connect(close_btn, SIGNAL(clicked(bool)),
 202                 this, SLOT(on_view_close_clicked()));
 203
 204         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 205                 qobject_cast<views::ViewBase*>(v.get()),
 206                 SLOT(trigger_event(util::Timestamp)));
 207
 208         if (type == views::ViewTypeTrace) {
 209                 views::TraceView::View *tv =
 210                         qobject_cast<views::TraceView::View*>(v.get());
 211
 212                 tv->enable_sticky_scrolling(true);
 213                 tv->enable_coloured_bg(settings.value(GlobalSettings::Key_View_ColouredBG).toBool());
 214
 215                 if (!main_bar) {
 216                         /* Initial view, create the main bar */
 217                         main_bar = make_shared<MainBar>(session, this, tv);
 218                         dock_main->addToolBar(main_bar.get());
 219                         session.set_main_bar(main_bar);
 220
 221                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 222                                 this, SLOT(on_new_view(Session*)));
 223
 224                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 225
 226                         /* For the main view we need to prevent the dock widget from
 227                          * closing itself when its close button is clicked. This is
 228                          * so we can confirm with the user first. Regular views don't
 229                          * need this */
 230                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 231                 } else {
 232                         /* Additional view, create a standard bar */
 233                         pv::views::trace::StandardBar *standard_bar =
 234                                 new pv::views::trace::StandardBar(session, this, tv);
 235                         dock_main->addToolBar(standard_bar);
 236
 237                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 238                 }
 239         }
 240
 241         return v;
 242 }
 243
 244 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 245 {
 246         for (shared_ptr<Session> session : sessions_) {
 247                 if (!session->has_view(view))
 248                         continue;
 249
 250                 // Find the dock the view is contained in and remove it
 251                 for (auto entry : view_docks_)
 252                         if (entry.second == view) {
 253                                 // Remove the view from the session
 254                                 session->deregister_view(view);
 255
 256                                 // Remove the view from its parent; otherwise, Qt will
 257                                 // call deleteLater() on it, which causes a double free
 258                                 // since the shared_ptr in view_docks_ doesn't know
 259                                 // that Qt keeps a pointer to the view around
 260                                 view->setParent(nullptr);
 261
 262                                 // Delete the view's dock widget and all widgets inside it
 263                                 entry.first->deleteLater();
 264
 265                                 // Remove the dock widget from the list and stop iterating
 266                                 view_docks_.erase(entry.first);
 267                                 break;
 268                         }
 269         }
 270 }
 271
 272 shared_ptr<Session> MainWindow::add_session()
 273 {
 274         static int last_session_id = 1;
 275         QString name = tr("Session %1").arg(last_session_id++);
 276
 277         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 278
 279         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 280                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 281         connect(session.get(), SIGNAL(name_changed()),
 282                 this, SLOT(on_session_name_changed()));
 283         session_state_mapper_.setMapping(session.get(), session.get());
 284         connect(session.get(), SIGNAL(capture_state_changed(int)),
 285                 &session_state_mapper_, SLOT(map()));
 286
 287         sessions_.push_back(session);
 288
 289         QMainWindow *window = new QMainWindow();
 290         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 291         session_windows_[session] = window;
 292
 293         int index = session_selector_.addTab(window, name);
 294         session_selector_.setCurrentIndex(index);
 295         last_focused_session_ = session;
 296
 297         window->setDockNestingEnabled(true);
 298
 299         shared_ptr<views::ViewBase> main_view =
 300                 add_view(name, views::ViewTypeTrace, *session);
 301
 302         return session;
 303 }
 304
 305 void MainWindow::remove_session(shared_ptr<Session> session)
 306 {
 307         int h = new_session_button_->height();
 308
 309         for (shared_ptr<views::ViewBase> view : session->views())
 310                 remove_view(view);
 311
 312         QMainWindow *window = session_windows_.at(session);
 313         session_selector_.removeTab(session_selector_.indexOf(window));
 314
 315         session_windows_.erase(session);
 316
 317         if (last_focused_session_ == session)
 318                 last_focused_session_.reset();
 319
 320         sessions_.remove_if([&](shared_ptr<Session> s) {
 321                 return s == session; });
 322
 323         if (sessions_.empty()) {
 324                 // When there are no more tabs, the height of the QTabWidget
 325                 // drops to zero. We must prevent this to keep the static
 326                 // widgets visible
 327                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 328                         w->setMinimumHeight(h);
 329
 330                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 331                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 332                 session_selector_.setMinimumHeight(h + 2 * margin);
 333
 334                 // Update the window title if there is no view left to
 335                 // generate focus change events
 336                 setWindowTitle(WindowTitle);
 337         }
 338 }
 339
 340 void MainWindow::setup_ui()
 341 {
 342         setObjectName(QString::fromUtf8("MainWindow"));
 343
 344         setCentralWidget(&session_selector_);
 345
 346         // Set the window icon
 347         QIcon icon;
 348         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 349         setWindowIcon(icon);
 350
 351         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 352         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 353
 354         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 355         view_coloured_bg_shortcut_->setAutoRepeat(false);
 356
 357         action_about_->setObjectName(QString::fromUtf8("actionAbout"));
 358         action_about_->setToolTip(tr("&About..."));
 359
 360         // Set up the tab area
 361         new_session_button_ = new QToolButton();
 362         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 363                 QIcon(":/icons/document-new.png")));
 364         new_session_button_->setToolTip(tr("Create New Session"));
 365         new_session_button_->setAutoRaise(true);
 366
 367         run_stop_button_ = new QToolButton();
 368         run_stop_button_->setAutoRaise(true);
 369         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 370         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 371
 372         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 373         run_stop_shortcut_->setAutoRepeat(false);
 374
 375         settings_button_ = new QToolButton();
 376         settings_button_->setIcon(QIcon::fromTheme("configure",
 377                 QIcon(":/icons/configure.png")));
 378         settings_button_->setToolTip(tr("Settings"));
 379         settings_button_->setAutoRaise(true);
 380
 381         QFrame *separator1 = new QFrame();
 382         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 383         QFrame *separator2 = new QFrame();
 384         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 385
 386         QHBoxLayout* layout = new QHBoxLayout();
 387         layout->setContentsMargins(2, 2, 2, 2);
 388         layout->addWidget(new_session_button_);
 389         layout->addWidget(separator1);
 390         layout->addWidget(run_stop_button_);
 391         layout->addWidget(separator2);
 392         layout->addWidget(settings_button_);
 393
 394         static_tab_widget_ = new QWidget();
 395         static_tab_widget_->setLayout(layout);
 396
 397         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 398         session_selector_.setTabsClosable(true);
 399
 400         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 401         close_application_shortcut_->setAutoRepeat(false);
 402
 403         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 404
 405         connect(new_session_button_, SIGNAL(clicked(bool)),
 406                 this, SLOT(on_new_session_clicked()));
 407         connect(run_stop_button_, SIGNAL(clicked(bool)),
 408                 this, SLOT(on_run_stop_clicked()));
 409         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 410                 this, SLOT(on_capture_state_changed(QObject*)));
 411         connect(settings_button_, SIGNAL(clicked(bool)),
 412                 this, SLOT(on_settings_clicked()));
 413
 414         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 415                 this, SLOT(on_tab_close_requested(int)));
 416         connect(&session_selector_, SIGNAL(currentChanged(int)),
 417                 this, SLOT(on_tab_changed(int)));
 418
 419
 420         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 421                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 422                 this, SLOT(on_focus_changed()));
 423 }
 424
 425 void MainWindow::save_ui_settings()
 426 {
 427         QSettings settings;
 428         int id = 0;
 429
 430         settings.beginGroup("MainWindow");
 431         settings.setValue("state", saveState());
 432         settings.setValue("geometry", saveGeometry());
 433         settings.endGroup();
 434
 435         for (shared_ptr<Session> session : sessions_) {
 436                 // Ignore sessions using the demo device or no device at all
 437                 if (session->device()) {
 438                         shared_ptr<devices::HardwareDevice> device =
 439                                 dynamic_pointer_cast< devices::HardwareDevice >
 440                                 (session->device());
 441
 442                         if (device &&
 443                                 device->hardware_device()->driver()->name() == "demo")
 444                                 continue;
 445
 446                         settings.beginGroup("Session" + QString::number(id++));
 447                         settings.remove("");  // Remove all keys in this group
 448                         session->save_settings(settings);
 449                         settings.endGroup();
 450                 }
 451         }
 452
 453         settings.setValue("sessions", id);
 454 }
 455
 456 void MainWindow::restore_ui_settings()
 457 {
 458         QSettings settings;
 459         int i, session_count;
 460
 461         settings.beginGroup("MainWindow");
 462
 463         if (settings.contains("geometry")) {
 464                 restoreGeometry(settings.value("geometry").toByteArray());
 465                 restoreState(settings.value("state").toByteArray());
 466         } else
 467                 resize(1000, 720);
 468
 469         settings.endGroup();
 470
 471         session_count = settings.value("sessions", 0).toInt();
 472
 473         for (i = 0; i < session_count; i++) {
 474                 settings.beginGroup("Session" + QString::number(i));
 475                 shared_ptr<Session> session = add_session();
 476                 session->restore_settings(settings);
 477                 settings.endGroup();
 478         }
 479 }
 480
 481 std::shared_ptr<Session> MainWindow::get_tab_session(int index) const
 482 {
 483         // Find the session that belongs to the tab's main window
 484         for (auto entry : session_windows_)
 485                 if (entry.second == session_selector_.widget(index))
 486                         return entry.first;
 487
 488         return nullptr;
 489 }
 490
 491 void MainWindow::closeEvent(QCloseEvent *event)
 492 {
 493         bool data_saved = true;
 494
 495         for (auto entry : session_windows_)
 496                 if (!entry.first->data_saved())
 497                         data_saved = false;
 498
 499         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 500                 tr("There is unsaved data. Close anyway?"),
 501                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 502                 event->ignore();
 503         } else {
 504                 save_ui_settings();
 505                 event->accept();
 506         }
 507 }
 508
 509 QMenu* MainWindow::createPopupMenu()
 510 {
 511         return nullptr;
 512 }
 513
 514 bool MainWindow::restoreState(const QByteArray &state, int version)
 515 {
 516         (void)state;
 517         (void)version;
 518
 519         // Do nothing. We don't want Qt to handle this, or else it
 520         // will try to restore all the dock widgets and create havoc.
 521
 522         return false;
 523 }
 524
 525 void MainWindow::session_error(const QString text, const QString info_text)
 526 {
 527         QMetaObject::invokeMethod(this, "show_session_error",
 528                 Qt::QueuedConnection, Q_ARG(QString, text),
 529                 Q_ARG(QString, info_text));
 530 }
 531
 532 void MainWindow::show_session_error(const QString text, const QString info_text)
 533 {
 534         QMessageBox msg(this);
 535         msg.setText(text);
 536         msg.setInformativeText(info_text);
 537         msg.setStandardButtons(QMessageBox::Ok);
 538         msg.setIcon(QMessageBox::Warning);
 539         msg.exec();
 540 }
 541
 542 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 543         Session *session)
 544 {
 545         // We get a pointer and need a reference
 546         for (std::shared_ptr<Session> s : sessions_)
 547                 if (s.get() == session)
 548                         add_view(title, type, *s);
 549 }
 550
 551 void MainWindow::on_focus_changed()
 552 {
 553         shared_ptr<views::ViewBase> view = get_active_view();
 554
 555         if (view) {
 556                 for (shared_ptr<Session> session : sessions_) {
 557                         if (session->has_view(view)) {
 558                                 if (session != last_focused_session_) {
 559                                         // Activate correct tab if necessary
 560                                         shared_ptr<Session> tab_session = get_tab_session(
 561                                                 session_selector_.currentIndex());
 562                                         if (tab_session != session)
 563                                                 session_selector_.setCurrentWidget(
 564                                                         session_windows_.at(session));
 565
 566                                         on_focused_session_changed(session);
 567                                 }
 568
 569                                 break;
 570                         }
 571                 }
 572         }
 573
 574         if (sessions_.empty())
 575                 setWindowTitle(WindowTitle);
 576 }
 577
 578 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 579 {
 580         last_focused_session_ = session;
 581
 582         setWindowTitle(session->name() + " - " + WindowTitle);
 583
 584         // Update the state of the run/stop button, too
 585         on_capture_state_changed(session.get());
 586 }
 587
 588 void MainWindow::on_new_session_clicked()
 589 {
 590         add_session();
 591 }
 592
 593 void MainWindow::on_run_stop_clicked()
 594 {
 595         shared_ptr<Session> session = last_focused_session_;
 596
 597         if (!session)
 598                 return;
 599
 600         switch (session->get_capture_state()) {
 601         case Session::Stopped:
 602                 session->start_capture([&](QString message) {
 603                         session_error("Capture failed", message); });
 604                 break;
 605         case Session::AwaitingTrigger:
 606         case Session::Running:
 607                 session->stop_capture();
 608                 break;
 609         }
 610 }
 611
 612 void MainWindow::on_settings_clicked()
 613 {
 614         dialogs::Settings dlg;
 615         dlg.exec();
 616 }
 617
 618 void MainWindow::on_session_name_changed()
 619 {
 620         // Update the corresponding dock widget's name(s)
 621         Session *session = qobject_cast<Session*>(QObject::sender());
 622         assert(session);
 623
 624         for (shared_ptr<views::ViewBase> view : session->views()) {
 625                 // Get the dock that contains the view
 626                 for (auto entry : view_docks_)
 627                         if (entry.second == view) {
 628                                 entry.first->setObjectName(session->name());
 629                                 entry.first->setWindowTitle(session->name());
 630                         }
 631         }
 632
 633         // Update the tab widget by finding the main window and the tab from that
 634         for (auto entry : session_windows_)
 635                 if (entry.first.get() == session) {
 636                         QMainWindow *window = entry.second;
 637                         const int index = session_selector_.indexOf(window);
 638                         session_selector_.setTabText(index, session->name());
 639                 }
 640
 641         // Refresh window title if the affected session has focus
 642         if (session == last_focused_session_.get())
 643                 setWindowTitle(session->name() + " - " + WindowTitle);
 644 }
 645
 646 void MainWindow::on_capture_state_changed(QObject *obj)
 647 {
 648         Session *caller = qobject_cast<Session*>(obj);
 649
 650         // Ignore if caller is not the currently focused session
 651         // unless there is only one session
 652         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 653                 return;
 654
 655         int state = caller->get_capture_state();
 656
 657         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 658         run_stop_button_->setIcon(*icons[state]);
 659         run_stop_button_->setText((state == pv::Session::Stopped) ?
 660                 tr("Run") : tr("Stop"));
 661 }
 662
 663 void MainWindow::on_new_view(Session *session)
 664 {
 665         // We get a pointer and need a reference
 666         for (std::shared_ptr<Session> s : sessions_)
 667                 if (s.get() == session)
 668                         add_view(session->name(), views::ViewTypeTrace, *s);
 669 }
 670
 671 void MainWindow::on_view_close_clicked()
 672 {
 673         // Find the dock widget that contains the close button that was clicked
 674         QObject *w = QObject::sender();
 675         QDockWidget *dock = nullptr;
 676
 677         while (w) {
 678             dock = qobject_cast<QDockWidget*>(w);
 679             if (dock)
 680                 break;
 681             w = w->parent();
 682         }
 683
 684         // Get the view contained in the dock widget
 685         shared_ptr<views::ViewBase> view;
 686
 687         for (auto entry : view_docks_)
 688                 if (entry.first == dock)
 689                         view = entry.second;
 690
 691         // Deregister the view
 692         for (shared_ptr<Session> session : sessions_) {
 693                 if (!session->has_view(view))
 694                         continue;
 695
 696                 // Also destroy the entire session if its main view is closing...
 697                 if (view == session->main_view()) {
 698                         // ...but only if data is saved or the user confirms closing
 699                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 700                                 tr("This session contains unsaved data. Close it anyway?"),
 701                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 702                                 remove_session(session);
 703                         break;
 704                 } else
 705                         // All other views can be closed at any time as no data will be lost
 706                         remove_view(view);
 707         }
 708 }
 709
 710 void MainWindow::on_tab_changed(int index)
 711 {
 712         shared_ptr<Session> session = get_tab_session(index);
 713
 714         if (session)
 715                 on_focused_session_changed(session);
 716 }
 717
 718 void MainWindow::on_tab_close_requested(int index)
 719 {
 720         shared_ptr<Session> session = get_tab_session(index);
 721
 722         assert(session);
 723
 724         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 725                 tr("This session contains unsaved data. Close it anyway?"),
 726                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 727                 remove_session(session);
 728 }
 729
 730 void MainWindow::on_view_sticky_scrolling_shortcut()
 731 {
 732         shared_ptr<views::ViewBase> viewbase = get_active_view();
 733         views::TraceView::View* view =
 734                 qobject_cast<views::TraceView::View*>(viewbase.get());
 735         if (view)
 736                 view->toggle_sticky_scrolling();
 737 }
 738
 739 void MainWindow::on_view_coloured_bg_shortcut()
 740 {
 741         GlobalSettings settings;
 742
 743         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
 744         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
 745 }
 746
 747 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
 748 {
 749         bool state = new_value.toBool();
 750
 751         for (auto entry : view_docks_) {
 752                 shared_ptr<views::ViewBase> viewbase = entry.second;
 753
 754                 // Only trace views have this setting
 755                 views::TraceView::View* view =
 756                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 757                 if (view)
 758                         view->enable_coloured_bg(state);
 759         }
 760 }
 761
 762 void MainWindow::on_actionAbout_triggered()
 763 {
 764         dialogs::About dlg(device_manager_.context(), this);
 765         dlg.exec();
 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