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 <QDebug>
  34 #include <QDockWidget>
  35 #include <QHBoxLayout>
  36 #include <QMessageBox>
  37 #include <QSettings>
  38 #include <QShortcut>
  39 #include <QWidget>
  40
  41 #include "mainwindow.hpp"
  42
  43 #include "devicemanager.hpp"
  44 #include "devices/hardwaredevice.hpp"
  45 #include "dialogs/settings.hpp"
  46 #include "globalsettings.hpp"
  47 #include "toolbars/mainbar.hpp"
  48 #include "util.hpp"
  49 #include "views/trace/view.hpp"
  50 #include "views/trace/standardbar.hpp"
  51
  52 #include <libsigrokcxx/libsigrokcxx.hpp>
  53
  54 using std::dynamic_pointer_cast;
  55 using std::make_shared;
  56 using std::shared_ptr;
  57 using std::string;
  58
  59 namespace pv {
  60
  61 namespace view {
  62 class ViewItem;
  63 }
  64
  65 using toolbars::MainBar;
  66
  67 const QString MainWindow::WindowTitle = tr("PulseView");
  68
  69 MainWindow::MainWindow(DeviceManager &device_manager, QWidget *parent) :
  70         QMainWindow(parent),
  71         device_manager_(device_manager),
  72         session_selector_(this),
  73         session_state_mapper_(this),
  74         icon_red_(":/icons/status-red.svg"),
  75         icon_green_(":/icons/status-green.svg"),
  76         icon_grey_(":/icons/status-grey.svg")
  77 {
  78         GlobalSettings::add_change_handler(this);
  79
  80         setup_ui();
  81         restore_ui_settings();
  82 }
  83
  84 MainWindow::~MainWindow()
  85 {
  86         GlobalSettings::remove_change_handler(this);
  87
  88         while (!sessions_.empty())
  89                 remove_session(sessions_.front());
  90 }
  91
  92 void MainWindow::show_session_error(const QString text, const QString info_text)
  93 {
  94         // TODO Emulate noquote()
  95         qDebug() << "Notifying user of session error:" << info_text;
  96
  97         QMessageBox msg;
  98         msg.setText(text + "\n\n" + info_text);
  99         msg.setStandardButtons(QMessageBox::Ok);
 100         msg.setIcon(QMessageBox::Warning);
 101         msg.exec();
 102 }
 103
 104 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 105 {
 106         // If there's only one view, use it...
 107         if (view_docks_.size() == 1)
 108                 return view_docks_.begin()->second;
 109
 110         // ...otherwise find the dock widget the widget with focus is contained in
 111         QObject *w = QApplication::focusWidget();
 112         QDockWidget *dock = nullptr;
 113
 114         while (w) {
 115                 dock = qobject_cast<QDockWidget*>(w);
 116                 if (dock)
 117                         break;
 118                 w = w->parent();
 119         }
 120
 121         // Get the view contained in the dock widget
 122         for (auto& entry : view_docks_)
 123                 if (entry.first == dock)
 124                         return entry.second;
 125
 126         return nullptr;
 127 }
 128
 129 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 130         views::ViewType type, Session &session)
 131 {
 132         GlobalSettings settings;
 133         shared_ptr<views::ViewBase> v;
 134
 135         QMainWindow *main_window = nullptr;
 136         for (auto& entry : session_windows_)
 137                 if (entry.first.get() == &session)
 138                         main_window = entry.second;
 139
 140         assert(main_window);
 141
 142         shared_ptr<MainBar> main_bar = session.main_bar();
 143
 144         QDockWidget* dock = new QDockWidget(title, main_window);
 145         dock->setObjectName(title);
 146         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 147
 148         // Insert a QMainWindow into the dock widget to allow for a tool bar
 149         QMainWindow *dock_main = new QMainWindow(dock);
 150         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 151
 152         if (type == views::ViewTypeTrace)
 153                 // This view will be the main view if there's no main bar yet
 154                 v = make_shared<views::trace::View>(session,
 155                         (main_bar ? false : true), dock_main);
 156
 157         if (!v)
 158                 return nullptr;
 159
 160         view_docks_[dock] = v;
 161         session.register_view(v);
 162
 163         dock_main->setCentralWidget(v.get());
 164         dock->setWidget(dock_main);
 165
 166         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 167         dock->setFeatures(QDockWidget::DockWidgetMovable |
 168                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 169
 170         QAbstractButton *close_btn =
 171                 dock->findChildren<QAbstractButton*>("qt_dockwidget_closebutton")  // clazy:exclude=detaching-temporary
 172                         .front();
 173
 174         connect(close_btn, SIGNAL(clicked(bool)),
 175                 this, SLOT(on_view_close_clicked()));
 176
 177         connect(&session, SIGNAL(trigger_event(int, util::Timestamp)),
 178                 qobject_cast<views::ViewBase*>(v.get()),
 179                 SLOT(trigger_event(int, util::Timestamp)));
 180
 181         if (type == views::ViewTypeTrace) {
 182                 views::trace::View *tv =
 183                         qobject_cast<views::trace::View*>(v.get());
 184
 185                 tv->enable_colored_bg(settings.value(GlobalSettings::Key_View_ColoredBG).toBool());
 186                 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
 187                 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
 188
 189                 if (!main_bar) {
 190                         /* Initial view, create the main bar */
 191                         main_bar = make_shared<MainBar>(session, this, tv);
 192                         dock_main->addToolBar(main_bar.get());
 193                         session.set_main_bar(main_bar);
 194
 195                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 196                                 this, SLOT(on_new_view(Session*)));
 197
 198                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 199
 200                         /* For the main view we need to prevent the dock widget from
 201                          * closing itself when its close button is clicked. This is
 202                          * so we can confirm with the user first. Regular views don't
 203                          * need this */
 204                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 205                 } else {
 206                         /* Additional view, create a standard bar */
 207                         pv::views::trace::StandardBar *standard_bar =
 208                                 new pv::views::trace::StandardBar(session, this, tv);
 209                         dock_main->addToolBar(standard_bar);
 210
 211                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 212                 }
 213         }
 214
 215         return v;
 216 }
 217
 218 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 219 {
 220         for (shared_ptr<Session> session : sessions_) {
 221                 if (!session->has_view(view))
 222                         continue;
 223
 224                 // Find the dock the view is contained in and remove it
 225                 for (auto& entry : view_docks_)
 226                         if (entry.second == view) {
 227                                 // Remove the view from the session
 228                                 session->deregister_view(view);
 229
 230                                 // Remove the view from its parent; otherwise, Qt will
 231                                 // call deleteLater() on it, which causes a double free
 232                                 // since the shared_ptr in view_docks_ doesn't know
 233                                 // that Qt keeps a pointer to the view around
 234                                 view->setParent(nullptr);
 235
 236                                 // Delete the view's dock widget and all widgets inside it
 237                                 entry.first->deleteLater();
 238
 239                                 // Remove the dock widget from the list and stop iterating
 240                                 view_docks_.erase(entry.first);
 241                                 break;
 242                         }
 243         }
 244 }
 245
 246 shared_ptr<Session> MainWindow::add_session()
 247 {
 248         static int last_session_id = 1;
 249         QString name = tr("Session %1").arg(last_session_id++);
 250
 251         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 252
 253         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 254                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 255         connect(session.get(), SIGNAL(name_changed()),
 256                 this, SLOT(on_session_name_changed()));
 257         session_state_mapper_.setMapping(session.get(), session.get());
 258         connect(session.get(), SIGNAL(capture_state_changed(int)),
 259                 &session_state_mapper_, SLOT(map()));
 260
 261         sessions_.push_back(session);
 262
 263         QMainWindow *window = new QMainWindow();
 264         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 265         session_windows_[session] = window;
 266
 267         int index = session_selector_.addTab(window, name);
 268         session_selector_.setCurrentIndex(index);
 269         last_focused_session_ = session;
 270
 271         window->setDockNestingEnabled(true);
 272
 273         shared_ptr<views::ViewBase> main_view =
 274                 add_view(name, views::ViewTypeTrace, *session);
 275
 276         return session;
 277 }
 278
 279 void MainWindow::remove_session(shared_ptr<Session> session)
 280 {
 281         // Determine the height of the button before it collapses
 282         int h = new_session_button_->height();
 283
 284         // Stop capture while the session still exists so that the UI can be
 285         // updated in case we're currently running. If so, this will schedule a
 286         // call to our on_capture_state_changed() slot for the next run of the
 287         // event loop. We need to have this executed immediately or else it will
 288         // be dismissed since the session object will be deleted by the time we
 289         // leave this method and the event loop gets a chance to run again.
 290         session->stop_capture();
 291         QApplication::processEvents();
 292
 293         for (const shared_ptr<views::ViewBase>& view : session->views())
 294                 remove_view(view);
 295
 296         QMainWindow *window = session_windows_.at(session);
 297         session_selector_.removeTab(session_selector_.indexOf(window));
 298
 299         session_windows_.erase(session);
 300
 301         if (last_focused_session_ == session)
 302                 last_focused_session_.reset();
 303
 304         // Remove the session from our list of sessions (which also destroys it)
 305         sessions_.remove_if([&](shared_ptr<Session> s) {
 306                 return s == session; });
 307
 308         if (sessions_.empty()) {
 309                 // When there are no more tabs, the height of the QTabWidget
 310                 // drops to zero. We must prevent this to keep the static
 311                 // widgets visible
 312                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())  // clazy:exclude=range-loop
 313                         w->setMinimumHeight(h);
 314
 315                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 316                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 317                 session_selector_.setMinimumHeight(h + 2 * margin);
 318
 319                 // Update the window title if there is no view left to
 320                 // generate focus change events
 321                 setWindowTitle(WindowTitle);
 322         }
 323 }
 324
 325 void MainWindow::add_session_with_file(string open_file_name,
 326         string open_file_format)
 327 {
 328         shared_ptr<Session> session = add_session();
 329         session->load_init_file(open_file_name, open_file_format);
 330 }
 331
 332 void MainWindow::add_default_session()
 333 {
 334         // Only add the default session if there would be no session otherwise
 335         if (sessions_.size() > 0)
 336                 return;
 337
 338         shared_ptr<Session> session = add_session();
 339
 340         // Check the list of available devices. Prefer the one that was
 341         // found with user supplied scan specs (if applicable). Then try
 342         // one of the auto detected devices that are not the demo device.
 343         // Pick demo in the absence of "genuine" hardware devices.
 344         shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
 345         for (const shared_ptr<devices::HardwareDevice>& dev : device_manager_.devices()) {
 346                 if (dev == device_manager_.user_spec_device()) {
 347                         user_device = dev;
 348                 } else if (dev->hardware_device()->driver()->name() == "demo") {
 349                         demo_device = dev;
 350                 } else {
 351                         other_device = dev;
 352                 }
 353         }
 354         if (user_device)
 355                 session->select_device(user_device);
 356         else if (other_device)
 357                 session->select_device(other_device);
 358         else
 359                 session->select_device(demo_device);
 360 }
 361
 362 void MainWindow::save_sessions()
 363 {
 364         QSettings settings;
 365         int id = 0;
 366
 367         for (shared_ptr<Session>& session : sessions_) {
 368                 // Ignore sessions using the demo device or no device at all
 369                 if (session->device()) {
 370                         shared_ptr<devices::HardwareDevice> device =
 371                                 dynamic_pointer_cast< devices::HardwareDevice >
 372                                 (session->device());
 373
 374                         if (device &&
 375                                 device->hardware_device()->driver()->name() == "demo")
 376                                 continue;
 377
 378                         settings.beginGroup("Session" + QString::number(id++));
 379                         settings.remove("");  // Remove all keys in this group
 380                         session->save_settings(settings);
 381                         settings.endGroup();
 382                 }
 383         }
 384
 385         settings.setValue("sessions", id);
 386 }
 387
 388 void MainWindow::restore_sessions()
 389 {
 390         QSettings settings;
 391         int i, session_count;
 392
 393         session_count = settings.value("sessions", 0).toInt();
 394
 395         for (i = 0; i < session_count; i++) {
 396                 settings.beginGroup("Session" + QString::number(i));
 397                 shared_ptr<Session> session = add_session();
 398                 session->restore_settings(settings);
 399                 settings.endGroup();
 400         }
 401 }
 402
 403 void MainWindow::on_setting_changed(const QString &key, const QVariant &value)
 404 {
 405         if (key == GlobalSettings::Key_View_ColoredBG)
 406                 on_settingViewColoredBg_changed(value);
 407
 408         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
 409                 on_settingViewShowSamplingPoints_changed(value);
 410
 411         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
 412                 on_settingViewShowAnalogMinorGrid_changed(value);
 413 }
 414
 415 void MainWindow::setup_ui()
 416 {
 417         setObjectName(QString::fromUtf8("MainWindow"));
 418
 419         setCentralWidget(&session_selector_);
 420
 421         // Set the window icon
 422         QIcon icon;
 423         icon.addFile(QString(":/icons/pulseview.png"));
 424         setWindowIcon(icon);
 425
 426         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 427         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 428
 429         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 430         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 431
 432         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 433         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 434
 435         view_colored_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_colored_bg_shortcut()));
 436         view_colored_bg_shortcut_->setAutoRepeat(false);
 437
 438         // Set up the tab area
 439         new_session_button_ = new QToolButton();
 440         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 441                 QIcon(":/icons/document-new.png")));
 442         new_session_button_->setToolTip(tr("Create New Session"));
 443         new_session_button_->setAutoRaise(true);
 444
 445         run_stop_button_ = new QToolButton();
 446         run_stop_button_->setAutoRaise(true);
 447         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 448         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 449
 450         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 451         run_stop_shortcut_->setAutoRepeat(false);
 452
 453         settings_button_ = new QToolButton();
 454         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 455                 QIcon(":/icons/preferences-system.png")));
 456         settings_button_->setToolTip(tr("Settings"));
 457         settings_button_->setAutoRaise(true);
 458
 459         QFrame *separator1 = new QFrame();
 460         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 461         QFrame *separator2 = new QFrame();
 462         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 463
 464         QHBoxLayout* layout = new QHBoxLayout();
 465         layout->setContentsMargins(2, 2, 2, 2);
 466         layout->addWidget(new_session_button_);
 467         layout->addWidget(separator1);
 468         layout->addWidget(run_stop_button_);
 469         layout->addWidget(separator2);
 470         layout->addWidget(settings_button_);
 471
 472         static_tab_widget_ = new QWidget();
 473         static_tab_widget_->setLayout(layout);
 474
 475         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 476         session_selector_.setTabsClosable(true);
 477
 478         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 479         close_application_shortcut_->setAutoRepeat(false);
 480
 481         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 482
 483         connect(new_session_button_, SIGNAL(clicked(bool)),
 484                 this, SLOT(on_new_session_clicked()));
 485         connect(run_stop_button_, SIGNAL(clicked(bool)),
 486                 this, SLOT(on_run_stop_clicked()));
 487         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 488                 this, SLOT(on_capture_state_changed(QObject*)));
 489         connect(settings_button_, SIGNAL(clicked(bool)),
 490                 this, SLOT(on_settings_clicked()));
 491
 492         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 493                 this, SLOT(on_tab_close_requested(int)));
 494         connect(&session_selector_, SIGNAL(currentChanged(int)),
 495                 this, SLOT(on_tab_changed(int)));
 496
 497
 498         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 499                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 500                 this, SLOT(on_focus_changed()));
 501 }
 502
 503 void MainWindow::save_ui_settings()
 504 {
 505         QSettings settings;
 506
 507         settings.beginGroup("MainWindow");
 508         settings.setValue("state", saveState());
 509         settings.setValue("geometry", saveGeometry());
 510         settings.endGroup();
 511 }
 512
 513 void MainWindow::restore_ui_settings()
 514 {
 515         QSettings settings;
 516
 517         settings.beginGroup("MainWindow");
 518
 519         if (settings.contains("geometry")) {
 520                 restoreGeometry(settings.value("geometry").toByteArray());
 521                 restoreState(settings.value("state").toByteArray());
 522         } else
 523                 resize(1000, 720);
 524
 525         settings.endGroup();
 526 }
 527
 528 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 529 {
 530         // Find the session that belongs to the tab's main window
 531         for (auto& entry : session_windows_)
 532                 if (entry.second == session_selector_.widget(index))
 533                         return entry.first;
 534
 535         return nullptr;
 536 }
 537
 538 void MainWindow::closeEvent(QCloseEvent *event)
 539 {
 540         bool data_saved = true;
 541
 542         for (auto& entry : session_windows_)
 543                 if (!entry.first->data_saved())
 544                         data_saved = false;
 545
 546         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 547                 tr("There is unsaved data. Close anyway?"),
 548                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 549                 event->ignore();
 550         } else {
 551                 save_ui_settings();
 552                 save_sessions();
 553                 event->accept();
 554         }
 555 }
 556
 557 QMenu* MainWindow::createPopupMenu()
 558 {
 559         return nullptr;
 560 }
 561
 562 bool MainWindow::restoreState(const QByteArray &state, int version)
 563 {
 564         (void)state;
 565         (void)version;
 566
 567         // Do nothing. We don't want Qt to handle this, or else it
 568         // will try to restore all the dock widgets and create havoc.
 569
 570         return false;
 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                         show_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 (const 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_colored_bg_shortcut()
 763 {
 764         GlobalSettings settings;
 765
 766         bool state = settings.value(GlobalSettings::Key_View_ColoredBG).toBool();
 767         settings.setValue(GlobalSettings::Key_View_ColoredBG, !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_settingViewColoredBg_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::trace::View* view =
 803                                 qobject_cast<views::trace::View*>(viewbase.get());
 804                 if (view)
 805                         view->enable_colored_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::trace::View* view =
 818                                 qobject_cast<views::trace::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::trace::View* view =
 833                                 qobject_cast<views::trace::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