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 <algorithm>
  25 #include <cassert>
  26 #include <cstdarg>
  27 #include <cstdint>
  28 #include <iterator>
  29
  30 #include <QAction>
  31 #include <QApplication>
  32 #include <QCloseEvent>
  33 #include <QDockWidget>
  34 #include <QHBoxLayout>
  35 #include <QMessageBox>
  36 #include <QSettings>
  37 #include <QShortcut>
  38 #include <QWidget>
  39
  40 #include "mainwindow.hpp"
  41
  42 #include "devicemanager.hpp"
  43 #include "devices/hardwaredevice.hpp"
  44 #include "dialogs/settings.hpp"
  45 #include "globalsettings.hpp"
  46 #include "toolbars/mainbar.hpp"
  47 #include "util.hpp"
  48 #include "view/view.hpp"
  49 #include "views/trace/standardbar.hpp"
  50
  51 #include <libsigrokcxx/libsigrokcxx.hpp>
  52
  53 using std::bind;
  54 using std::dynamic_pointer_cast;
  55 using std::make_shared;
  56 using std::map;
  57 using std::placeholders::_1;
  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 const QString MainWindow::WindowTitle = tr("PulseView");
  70
  71 MainWindow::MainWindow(DeviceManager &device_manager, QWidget *parent) :
  72         QMainWindow(parent),
  73         device_manager_(device_manager),
  74         session_selector_(this),
  75         session_state_mapper_(this),
  76         icon_red_(":/icons/status-red.svg"),
  77         icon_green_(":/icons/status-green.svg"),
  78         icon_grey_(":/icons/status-grey.svg")
  79 {
  80         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  81         qRegisterMetaType<uint64_t>("uint64_t");
  82
  83         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ColouredBG,
  84                 bind(&MainWindow::on_settingViewColouredBg_changed, this, _1));
  85
  86         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ShowSamplingPoints,
  87                 bind(&MainWindow::on_settingViewShowSamplingPoints_changed, this, _1));
  88
  89         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ShowAnalogMinorGrid,
  90                 bind(&MainWindow::on_settingViewShowAnalogMinorGrid_changed, this, _1));
  91
  92         GlobalSettings settings;
  93         settings.set_defaults_where_needed();
  94
  95         setup_ui();
  96         restore_ui_settings();
  97 }
  98
  99 MainWindow::~MainWindow()
 100 {
 101         while (!sessions_.empty())
 102                 remove_session(sessions_.front());
 103 }
 104
 105 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 106 {
 107         // If there's only one view, use it...
 108         if (view_docks_.size() == 1)
 109                 return view_docks_.begin()->second;
 110
 111         // ...otherwise find the dock widget the widget with focus is contained in
 112         QObject *w = QApplication::focusWidget();
 113         QDockWidget *dock = nullptr;
 114
 115         while (w) {
 116                 dock = qobject_cast<QDockWidget*>(w);
 117                 if (dock)
 118                         break;
 119                 w = w->parent();
 120         }
 121
 122         // Get the view contained in the dock widget
 123         for (auto entry : view_docks_)
 124                 if (entry.first == dock)
 125                         return entry.second;
 126
 127         return nullptr;
 128 }
 129
 130 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 131         views::ViewType type, Session &session)
 132 {
 133         GlobalSettings settings;
 134         shared_ptr<views::ViewBase> v;
 135
 136         QMainWindow *main_window = nullptr;
 137         for (auto entry : session_windows_)
 138                 if (entry.first.get() == &session)
 139                         main_window = entry.second;
 140
 141         assert(main_window);
 142
 143         shared_ptr<MainBar> main_bar = session.main_bar();
 144
 145         QDockWidget* dock = new QDockWidget(title, main_window);
 146         dock->setObjectName(title);
 147         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 148
 149         // Insert a QMainWindow into the dock widget to allow for a tool bar
 150         QMainWindow *dock_main = new QMainWindow(dock);
 151         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 152
 153         if (type == views::ViewTypeTrace)
 154                 // This view will be the main view if there's no main bar yet
 155                 v = make_shared<views::TraceView::View>(session,
 156                         (main_bar ? false : true), dock_main);
 157
 158         if (!v)
 159                 return nullptr;
 160
 161         view_docks_[dock] = v;
 162         session.register_view(v);
 163
 164         dock_main->setCentralWidget(v.get());
 165         dock->setWidget(dock_main);
 166
 167         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 168         dock->setFeatures(QDockWidget::DockWidgetMovable |
 169                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 170
 171         QAbstractButton *close_btn =
 172                 dock->findChildren<QAbstractButton*>
 173                         ("qt_dockwidget_closebutton").front();
 174
 175         connect(close_btn, SIGNAL(clicked(bool)),
 176                 this, SLOT(on_view_close_clicked()));
 177
 178         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 179                 qobject_cast<views::ViewBase*>(v.get()),
 180                 SLOT(trigger_event(util::Timestamp)));
 181
 182         if (type == views::ViewTypeTrace) {
 183                 views::TraceView::View *tv =
 184                         qobject_cast<views::TraceView::View*>(v.get());
 185
 186                 tv->enable_coloured_bg(settings.value(GlobalSettings::Key_View_ColouredBG).toBool());
 187                 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
 188                 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
 189
 190                 if (!main_bar) {
 191                         /* Initial view, create the main bar */
 192                         main_bar = make_shared<MainBar>(session, this, tv);
 193                         dock_main->addToolBar(main_bar.get());
 194                         session.set_main_bar(main_bar);
 195
 196                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 197                                 this, SLOT(on_new_view(Session*)));
 198
 199                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 200
 201                         /* For the main view we need to prevent the dock widget from
 202                          * closing itself when its close button is clicked. This is
 203                          * so we can confirm with the user first. Regular views don't
 204                          * need this */
 205                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 206                 } else {
 207                         /* Additional view, create a standard bar */
 208                         pv::views::trace::StandardBar *standard_bar =
 209                                 new pv::views::trace::StandardBar(session, this, tv);
 210                         dock_main->addToolBar(standard_bar);
 211
 212                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 213                 }
 214         }
 215
 216         return v;
 217 }
 218
 219 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 220 {
 221         for (shared_ptr<Session> session : sessions_) {
 222                 if (!session->has_view(view))
 223                         continue;
 224
 225                 // Find the dock the view is contained in and remove it
 226                 for (auto entry : view_docks_)
 227                         if (entry.second == view) {
 228                                 // Remove the view from the session
 229                                 session->deregister_view(view);
 230
 231                                 // Remove the view from its parent; otherwise, Qt will
 232                                 // call deleteLater() on it, which causes a double free
 233                                 // since the shared_ptr in view_docks_ doesn't know
 234                                 // that Qt keeps a pointer to the view around
 235                                 view->setParent(nullptr);
 236
 237                                 // Delete the view's dock widget and all widgets inside it
 238                                 entry.first->deleteLater();
 239
 240                                 // Remove the dock widget from the list and stop iterating
 241                                 view_docks_.erase(entry.first);
 242                                 break;
 243                         }
 244         }
 245 }
 246
 247 shared_ptr<Session> MainWindow::add_session()
 248 {
 249         static int last_session_id = 1;
 250         QString name = tr("Session %1").arg(last_session_id++);
 251
 252         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 253
 254         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 255                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 256         connect(session.get(), SIGNAL(name_changed()),
 257                 this, SLOT(on_session_name_changed()));
 258         session_state_mapper_.setMapping(session.get(), session.get());
 259         connect(session.get(), SIGNAL(capture_state_changed(int)),
 260                 &session_state_mapper_, SLOT(map()));
 261
 262         sessions_.push_back(session);
 263
 264         QMainWindow *window = new QMainWindow();
 265         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 266         session_windows_[session] = window;
 267
 268         int index = session_selector_.addTab(window, name);
 269         session_selector_.setCurrentIndex(index);
 270         last_focused_session_ = session;
 271
 272         window->setDockNestingEnabled(true);
 273
 274         shared_ptr<views::ViewBase> main_view =
 275                 add_view(name, views::ViewTypeTrace, *session);
 276
 277         return session;
 278 }
 279
 280 void MainWindow::remove_session(shared_ptr<Session> session)
 281 {
 282         // Determine the height of the button before it collapses
 283         int h = new_session_button_->height();
 284
 285         // Stop capture while the session still exists so that the UI can be
 286         // updated in case we're currently running. If so, this will schedule a
 287         // call to our on_capture_state_changed() slot for the next run of the
 288         // event loop. We need to have this executed immediately or else it will
 289         // be dismissed since the session object will be deleted by the time we
 290         // leave this method and the event loop gets a chance to run again.
 291         session->stop_capture();
 292         QApplication::processEvents();
 293
 294         for (shared_ptr<views::ViewBase> view : session->views())
 295                 remove_view(view);
 296
 297         QMainWindow *window = session_windows_.at(session);
 298         session_selector_.removeTab(session_selector_.indexOf(window));
 299
 300         session_windows_.erase(session);
 301
 302         if (last_focused_session_ == session)
 303                 last_focused_session_.reset();
 304
 305         // Remove the session from our list of sessions (which also destroys it)
 306         sessions_.remove_if([&](shared_ptr<Session> s) {
 307                 return s == session; });
 308
 309         if (sessions_.empty()) {
 310                 // When there are no more tabs, the height of the QTabWidget
 311                 // drops to zero. We must prevent this to keep the static
 312                 // widgets visible
 313                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 314                         w->setMinimumHeight(h);
 315
 316                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 317                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 318                 session_selector_.setMinimumHeight(h + 2 * margin);
 319
 320                 // Update the window title if there is no view left to
 321                 // generate focus change events
 322                 setWindowTitle(WindowTitle);
 323         }
 324 }
 325
 326 void MainWindow::add_session_with_file(string open_file_name,
 327         string open_file_format)
 328 {
 329         shared_ptr<Session> session = add_session();
 330         session->load_init_file(open_file_name, open_file_format);
 331 }
 332
 333 void MainWindow::add_default_session()
 334 {
 335         // Only add the default session if there would be no session otherwise
 336         if (sessions_.size() > 0)
 337                 return;
 338
 339         shared_ptr<Session> session = add_session();
 340
 341         map<string, string> dev_info;
 342         shared_ptr<devices::HardwareDevice> other_device, demo_device;
 343
 344         // Use any available device that's not demo
 345         for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
 346                 if (dev->hardware_device()->driver()->name() == "demo") {
 347                         demo_device = dev;
 348                 } else {
 349                         other_device = dev;
 350                 }
 351         }
 352
 353         // ...and if there isn't any, just use demo then
 354         session->select_device(other_device ? other_device : demo_device);
 355 }
 356
 357 void MainWindow::save_sessions()
 358 {
 359         QSettings settings;
 360         int id = 0;
 361
 362         for (shared_ptr<Session> session : sessions_) {
 363                 // Ignore sessions using the demo device or no device at all
 364                 if (session->device()) {
 365                         shared_ptr<devices::HardwareDevice> device =
 366                                 dynamic_pointer_cast< devices::HardwareDevice >
 367                                 (session->device());
 368
 369                         if (device &&
 370                                 device->hardware_device()->driver()->name() == "demo")
 371                                 continue;
 372
 373                         settings.beginGroup("Session" + QString::number(id++));
 374                         settings.remove("");  // Remove all keys in this group
 375                         session->save_settings(settings);
 376                         settings.endGroup();
 377                 }
 378         }
 379
 380         settings.setValue("sessions", id);
 381 }
 382
 383 void MainWindow::restore_sessions()
 384 {
 385         QSettings settings;
 386         int i, session_count;
 387
 388         session_count = settings.value("sessions", 0).toInt();
 389
 390         for (i = 0; i < session_count; i++) {
 391                 settings.beginGroup("Session" + QString::number(i));
 392                 shared_ptr<Session> session = add_session();
 393                 session->restore_settings(settings);
 394                 settings.endGroup();
 395         }
 396 }
 397
 398 void MainWindow::setup_ui()
 399 {
 400         setObjectName(QString::fromUtf8("MainWindow"));
 401
 402         setCentralWidget(&session_selector_);
 403
 404         // Set the window icon
 405         QIcon icon;
 406         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 407         setWindowIcon(icon);
 408
 409         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 410         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 411
 412         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 413         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 414
 415         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 416         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 417
 418         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 419         view_coloured_bg_shortcut_->setAutoRepeat(false);
 420
 421         // Set up the tab area
 422         new_session_button_ = new QToolButton();
 423         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 424                 QIcon(":/icons/document-new.png")));
 425         new_session_button_->setToolTip(tr("Create New Session"));
 426         new_session_button_->setAutoRaise(true);
 427
 428         run_stop_button_ = new QToolButton();
 429         run_stop_button_->setAutoRaise(true);
 430         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 431         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 432
 433         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 434         run_stop_shortcut_->setAutoRepeat(false);
 435
 436         settings_button_ = new QToolButton();
 437         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 438                 QIcon(":/icons/preferences-system.png")));
 439         settings_button_->setToolTip(tr("Settings"));
 440         settings_button_->setAutoRaise(true);
 441
 442         QFrame *separator1 = new QFrame();
 443         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 444         QFrame *separator2 = new QFrame();
 445         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 446
 447         QHBoxLayout* layout = new QHBoxLayout();
 448         layout->setContentsMargins(2, 2, 2, 2);
 449         layout->addWidget(new_session_button_);
 450         layout->addWidget(separator1);
 451         layout->addWidget(run_stop_button_);
 452         layout->addWidget(separator2);
 453         layout->addWidget(settings_button_);
 454
 455         static_tab_widget_ = new QWidget();
 456         static_tab_widget_->setLayout(layout);
 457
 458         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 459         session_selector_.setTabsClosable(true);
 460
 461         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 462         close_application_shortcut_->setAutoRepeat(false);
 463
 464         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 465
 466         connect(new_session_button_, SIGNAL(clicked(bool)),
 467                 this, SLOT(on_new_session_clicked()));
 468         connect(run_stop_button_, SIGNAL(clicked(bool)),
 469                 this, SLOT(on_run_stop_clicked()));
 470         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 471                 this, SLOT(on_capture_state_changed(QObject*)));
 472         connect(settings_button_, SIGNAL(clicked(bool)),
 473                 this, SLOT(on_settings_clicked()));
 474
 475         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 476                 this, SLOT(on_tab_close_requested(int)));
 477         connect(&session_selector_, SIGNAL(currentChanged(int)),
 478                 this, SLOT(on_tab_changed(int)));
 479
 480
 481         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 482                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 483                 this, SLOT(on_focus_changed()));
 484 }
 485
 486 void MainWindow::save_ui_settings()
 487 {
 488         QSettings settings;
 489
 490         settings.beginGroup("MainWindow");
 491         settings.setValue("state", saveState());
 492         settings.setValue("geometry", saveGeometry());
 493         settings.endGroup();
 494 }
 495
 496 void MainWindow::restore_ui_settings()
 497 {
 498         QSettings settings;
 499
 500         settings.beginGroup("MainWindow");
 501
 502         if (settings.contains("geometry")) {
 503                 restoreGeometry(settings.value("geometry").toByteArray());
 504                 restoreState(settings.value("state").toByteArray());
 505         } else
 506                 resize(1000, 720);
 507
 508         settings.endGroup();
 509 }
 510
 511 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 512 {
 513         // Find the session that belongs to the tab's main window
 514         for (auto entry : session_windows_)
 515                 if (entry.second == session_selector_.widget(index))
 516                         return entry.first;
 517
 518         return nullptr;
 519 }
 520
 521 void MainWindow::closeEvent(QCloseEvent *event)
 522 {
 523         bool data_saved = true;
 524
 525         for (auto entry : session_windows_)
 526                 if (!entry.first->data_saved())
 527                         data_saved = false;
 528
 529         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 530                 tr("There is unsaved data. Close anyway?"),
 531                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 532                 event->ignore();
 533         } else {
 534                 save_ui_settings();
 535                 save_sessions();
 536                 event->accept();
 537         }
 538 }
 539
 540 QMenu* MainWindow::createPopupMenu()
 541 {
 542         return nullptr;
 543 }
 544
 545 bool MainWindow::restoreState(const QByteArray &state, int version)
 546 {
 547         (void)state;
 548         (void)version;
 549
 550         // Do nothing. We don't want Qt to handle this, or else it
 551         // will try to restore all the dock widgets and create havoc.
 552
 553         return false;
 554 }
 555
 556 void MainWindow::session_error(const QString text, const QString info_text)
 557 {
 558         QMetaObject::invokeMethod(this, "show_session_error",
 559                 Qt::QueuedConnection, Q_ARG(QString, text),
 560                 Q_ARG(QString, info_text));
 561 }
 562
 563 void MainWindow::show_session_error(const QString text, const QString info_text)
 564 {
 565         QMessageBox msg(this);
 566         msg.setText(text);
 567         msg.setInformativeText(info_text);
 568         msg.setStandardButtons(QMessageBox::Ok);
 569         msg.setIcon(QMessageBox::Warning);
 570         msg.exec();
 571 }
 572
 573 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 574         Session *session)
 575 {
 576         // We get a pointer and need a reference
 577         for (shared_ptr<Session> s : sessions_)
 578                 if (s.get() == session)
 579                         add_view(title, type, *s);
 580 }
 581
 582 void MainWindow::on_focus_changed()
 583 {
 584         shared_ptr<views::ViewBase> view = get_active_view();
 585
 586         if (view) {
 587                 for (shared_ptr<Session> session : sessions_) {
 588                         if (session->has_view(view)) {
 589                                 if (session != last_focused_session_) {
 590                                         // Activate correct tab if necessary
 591                                         shared_ptr<Session> tab_session = get_tab_session(
 592                                                 session_selector_.currentIndex());
 593                                         if (tab_session != session)
 594                                                 session_selector_.setCurrentWidget(
 595                                                         session_windows_.at(session));
 596
 597                                         on_focused_session_changed(session);
 598                                 }
 599
 600                                 break;
 601                         }
 602                 }
 603         }
 604
 605         if (sessions_.empty())
 606                 setWindowTitle(WindowTitle);
 607 }
 608
 609 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 610 {
 611         last_focused_session_ = session;
 612
 613         setWindowTitle(session->name() + " - " + WindowTitle);
 614
 615         // Update the state of the run/stop button, too
 616         on_capture_state_changed(session.get());
 617 }
 618
 619 void MainWindow::on_new_session_clicked()
 620 {
 621         add_session();
 622 }
 623
 624 void MainWindow::on_run_stop_clicked()
 625 {
 626         shared_ptr<Session> session = last_focused_session_;
 627
 628         if (!session)
 629                 return;
 630
 631         switch (session->get_capture_state()) {
 632         case Session::Stopped:
 633                 session->start_capture([&](QString message) {
 634                         session_error("Capture failed", message); });
 635                 break;
 636         case Session::AwaitingTrigger:
 637         case Session::Running:
 638                 session->stop_capture();
 639                 break;
 640         }
 641 }
 642
 643 void MainWindow::on_settings_clicked()
 644 {
 645         dialogs::Settings dlg(device_manager_);
 646         dlg.exec();
 647 }
 648
 649 void MainWindow::on_session_name_changed()
 650 {
 651         // Update the corresponding dock widget's name(s)
 652         Session *session = qobject_cast<Session*>(QObject::sender());
 653         assert(session);
 654
 655         for (shared_ptr<views::ViewBase> view : session->views()) {
 656                 // Get the dock that contains the view
 657                 for (auto entry : view_docks_)
 658                         if (entry.second == view) {
 659                                 entry.first->setObjectName(session->name());
 660                                 entry.first->setWindowTitle(session->name());
 661                         }
 662         }
 663
 664         // Update the tab widget by finding the main window and the tab from that
 665         for (auto entry : session_windows_)
 666                 if (entry.first.get() == session) {
 667                         QMainWindow *window = entry.second;
 668                         const int index = session_selector_.indexOf(window);
 669                         session_selector_.setTabText(index, session->name());
 670                 }
 671
 672         // Refresh window title if the affected session has focus
 673         if (session == last_focused_session_.get())
 674                 setWindowTitle(session->name() + " - " + WindowTitle);
 675 }
 676
 677 void MainWindow::on_capture_state_changed(QObject *obj)
 678 {
 679         Session *caller = qobject_cast<Session*>(obj);
 680
 681         // Ignore if caller is not the currently focused session
 682         // unless there is only one session
 683         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 684                 return;
 685
 686         int state = caller->get_capture_state();
 687
 688         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 689         run_stop_button_->setIcon(*icons[state]);
 690         run_stop_button_->setText((state == pv::Session::Stopped) ?
 691                 tr("Run") : tr("Stop"));
 692 }
 693
 694 void MainWindow::on_new_view(Session *session)
 695 {
 696         // We get a pointer and need a reference
 697         for (shared_ptr<Session> s : sessions_)
 698                 if (s.get() == session)
 699                         add_view(session->name(), views::ViewTypeTrace, *s);
 700 }
 701
 702 void MainWindow::on_view_close_clicked()
 703 {
 704         // Find the dock widget that contains the close button that was clicked
 705         QObject *w = QObject::sender();
 706         QDockWidget *dock = nullptr;
 707
 708         while (w) {
 709             dock = qobject_cast<QDockWidget*>(w);
 710             if (dock)
 711                 break;
 712             w = w->parent();
 713         }
 714
 715         // Get the view contained in the dock widget
 716         shared_ptr<views::ViewBase> view;
 717
 718         for (auto entry : view_docks_)
 719                 if (entry.first == dock)
 720                         view = entry.second;
 721
 722         // Deregister the view
 723         for (shared_ptr<Session> session : sessions_) {
 724                 if (!session->has_view(view))
 725                         continue;
 726
 727                 // Also destroy the entire session if its main view is closing...
 728                 if (view == session->main_view()) {
 729                         // ...but only if data is saved or the user confirms closing
 730                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 731                                 tr("This session contains unsaved data. Close it anyway?"),
 732                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 733                                 remove_session(session);
 734                         break;
 735                 } else
 736                         // All other views can be closed at any time as no data will be lost
 737                         remove_view(view);
 738         }
 739 }
 740
 741 void MainWindow::on_tab_changed(int index)
 742 {
 743         shared_ptr<Session> session = get_tab_session(index);
 744
 745         if (session)
 746                 on_focused_session_changed(session);
 747 }
 748
 749 void MainWindow::on_tab_close_requested(int index)
 750 {
 751         shared_ptr<Session> session = get_tab_session(index);
 752
 753         if (!session)
 754                 return;
 755
 756         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 757                 tr("This session contains unsaved data. Close it anyway?"),
 758                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 759                 remove_session(session);
 760 }
 761
 762 void MainWindow::on_view_coloured_bg_shortcut()
 763 {
 764         GlobalSettings settings;
 765
 766         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
 767         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
 768 }
 769
 770 void MainWindow::on_view_sticky_scrolling_shortcut()
 771 {
 772         GlobalSettings settings;
 773
 774         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 775         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 776 }
 777
 778 void MainWindow::on_view_show_sampling_points_shortcut()
 779 {
 780         GlobalSettings settings;
 781
 782         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 783         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 784 }
 785
 786 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 787 {
 788         GlobalSettings settings;
 789
 790         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 791         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 792 }
 793
 794 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
 795 {
 796         bool state = new_value.toBool();
 797
 798         for (auto entry : view_docks_) {
 799                 shared_ptr<views::ViewBase> viewbase = entry.second;
 800
 801                 // Only trace views have this setting
 802                 views::TraceView::View* view =
 803                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 804                 if (view)
 805                         view->enable_coloured_bg(state);
 806         }
 807 }
 808
 809 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
 810 {
 811         bool state = new_value.toBool();
 812
 813         for (auto entry : view_docks_) {
 814                 shared_ptr<views::ViewBase> viewbase = entry.second;
 815
 816                 // Only trace views have this setting
 817                 views::TraceView::View* view =
 818                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 819                 if (view)
 820                         view->enable_show_sampling_points(state);
 821         }
 822 }
 823
 824 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
 825 {
 826         bool state = new_value.toBool();
 827
 828         for (auto entry : view_docks_) {
 829                 shared_ptr<views::ViewBase> viewbase = entry.second;
 830
 831                 // Only trace views have this setting
 832                 views::TraceView::View* view =
 833                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 834                 if (view)
 835                         view->enable_show_analog_minor_grid(state);
 836         }
 837 }
 838
 839 void MainWindow::on_close_current_tab()
 840 {
 841         int tab = session_selector_.currentIndex();
 842
 843         on_tab_close_requested(tab);
 844 }
 845
 846 } // namespace pv