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         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  79         qRegisterMetaType<uint64_t>("uint64_t");
  80
  81         GlobalSettings::add_change_handler(this);
  82
  83         setup_ui();
  84         restore_ui_settings();
  85 }
  86
  87 MainWindow::~MainWindow()
  88 {
  89         GlobalSettings::remove_change_handler(this);
  90
  91         while (!sessions_.empty())
  92                 remove_session(sessions_.front());
  93 }
  94
  95 void MainWindow::show_session_error(const QString text, const QString info_text)
  96 {
  97         qDebug().noquote() << "Notifying user of session error:" << info_text;
  98
  99         QMessageBox msg;
 100         msg.setText(text);
 101         msg.setInformativeText(info_text);
 102         msg.setStandardButtons(QMessageBox::Ok);
 103         msg.setIcon(QMessageBox::Warning);
 104         msg.exec();
 105 }
 106
 107 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 108 {
 109         // If there's only one view, use it...
 110         if (view_docks_.size() == 1)
 111                 return view_docks_.begin()->second;
 112
 113         // ...otherwise find the dock widget the widget with focus is contained in
 114         QObject *w = QApplication::focusWidget();
 115         QDockWidget *dock = nullptr;
 116
 117         while (w) {
 118                 dock = qobject_cast<QDockWidget*>(w);
 119                 if (dock)
 120                         break;
 121                 w = w->parent();
 122         }
 123
 124         // Get the view contained in the dock widget
 125         for (auto entry : view_docks_)
 126                 if (entry.first == dock)
 127                         return entry.second;
 128
 129         return nullptr;
 130 }
 131
 132 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 133         views::ViewType type, Session &session)
 134 {
 135         GlobalSettings settings;
 136         shared_ptr<views::ViewBase> v;
 137
 138         QMainWindow *main_window = nullptr;
 139         for (auto entry : session_windows_)
 140                 if (entry.first.get() == &session)
 141                         main_window = entry.second;
 142
 143         assert(main_window);
 144
 145         shared_ptr<MainBar> main_bar = session.main_bar();
 146
 147         QDockWidget* dock = new QDockWidget(title, main_window);
 148         dock->setObjectName(title);
 149         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 150
 151         // Insert a QMainWindow into the dock widget to allow for a tool bar
 152         QMainWindow *dock_main = new QMainWindow(dock);
 153         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 154
 155         if (type == views::ViewTypeTrace)
 156                 // This view will be the main view if there's no main bar yet
 157                 v = make_shared<views::trace::View>(session,
 158                         (main_bar ? false : true), dock_main);
 159
 160         if (!v)
 161                 return nullptr;
 162
 163         view_docks_[dock] = v;
 164         session.register_view(v);
 165
 166         dock_main->setCentralWidget(v.get());
 167         dock->setWidget(dock_main);
 168
 169         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 170         dock->setFeatures(QDockWidget::DockWidgetMovable |
 171                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 172
 173         QAbstractButton *close_btn =
 174                 dock->findChildren<QAbstractButton*>
 175                         ("qt_dockwidget_closebutton").front();
 176
 177         connect(close_btn, SIGNAL(clicked(bool)),
 178                 this, SLOT(on_view_close_clicked()));
 179
 180         connect(&session, SIGNAL(trigger_event(int, util::Timestamp)),
 181                 qobject_cast<views::ViewBase*>(v.get()),
 182                 SLOT(trigger_event(int, util::Timestamp)));
 183
 184         if (type == views::ViewTypeTrace) {
 185                 views::trace::View *tv =
 186                         qobject_cast<views::trace::View*>(v.get());
 187
 188                 tv->enable_coloured_bg(settings.value(GlobalSettings::Key_View_ColouredBG).toBool());
 189                 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
 190                 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
 191
 192                 if (!main_bar) {
 193                         /* Initial view, create the main bar */
 194                         main_bar = make_shared<MainBar>(session, this, tv);
 195                         dock_main->addToolBar(main_bar.get());
 196                         session.set_main_bar(main_bar);
 197
 198                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 199                                 this, SLOT(on_new_view(Session*)));
 200
 201                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 202
 203                         /* For the main view we need to prevent the dock widget from
 204                          * closing itself when its close button is clicked. This is
 205                          * so we can confirm with the user first. Regular views don't
 206                          * need this */
 207                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 208                 } else {
 209                         /* Additional view, create a standard bar */
 210                         pv::views::trace::StandardBar *standard_bar =
 211                                 new pv::views::trace::StandardBar(session, this, tv);
 212                         dock_main->addToolBar(standard_bar);
 213
 214                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 215                 }
 216         }
 217
 218         return v;
 219 }
 220
 221 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 222 {
 223         for (shared_ptr<Session> session : sessions_) {
 224                 if (!session->has_view(view))
 225                         continue;
 226
 227                 // Find the dock the view is contained in and remove it
 228                 for (auto entry : view_docks_)
 229                         if (entry.second == view) {
 230                                 // Remove the view from the session
 231                                 session->deregister_view(view);
 232
 233                                 // Remove the view from its parent; otherwise, Qt will
 234                                 // call deleteLater() on it, which causes a double free
 235                                 // since the shared_ptr in view_docks_ doesn't know
 236                                 // that Qt keeps a pointer to the view around
 237                                 view->setParent(nullptr);
 238
 239                                 // Delete the view's dock widget and all widgets inside it
 240                                 entry.first->deleteLater();
 241
 242                                 // Remove the dock widget from the list and stop iterating
 243                                 view_docks_.erase(entry.first);
 244                                 break;
 245                         }
 246         }
 247 }
 248
 249 shared_ptr<Session> MainWindow::add_session()
 250 {
 251         static int last_session_id = 1;
 252         QString name = tr("Session %1").arg(last_session_id++);
 253
 254         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 255
 256         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 257                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 258         connect(session.get(), SIGNAL(name_changed()),
 259                 this, SLOT(on_session_name_changed()));
 260         session_state_mapper_.setMapping(session.get(), session.get());
 261         connect(session.get(), SIGNAL(capture_state_changed(int)),
 262                 &session_state_mapper_, SLOT(map()));
 263
 264         sessions_.push_back(session);
 265
 266         QMainWindow *window = new QMainWindow();
 267         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 268         session_windows_[session] = window;
 269
 270         int index = session_selector_.addTab(window, name);
 271         session_selector_.setCurrentIndex(index);
 272         last_focused_session_ = session;
 273
 274         window->setDockNestingEnabled(true);
 275
 276         shared_ptr<views::ViewBase> main_view =
 277                 add_view(name, views::ViewTypeTrace, *session);
 278
 279         return session;
 280 }
 281
 282 void MainWindow::remove_session(shared_ptr<Session> session)
 283 {
 284         // Determine the height of the button before it collapses
 285         int h = new_session_button_->height();
 286
 287         // Stop capture while the session still exists so that the UI can be
 288         // updated in case we're currently running. If so, this will schedule a
 289         // call to our on_capture_state_changed() slot for the next run of the
 290         // event loop. We need to have this executed immediately or else it will
 291         // be dismissed since the session object will be deleted by the time we
 292         // leave this method and the event loop gets a chance to run again.
 293         session->stop_capture();
 294         QApplication::processEvents();
 295
 296         for (shared_ptr<views::ViewBase> view : session->views())
 297                 remove_view(view);
 298
 299         QMainWindow *window = session_windows_.at(session);
 300         session_selector_.removeTab(session_selector_.indexOf(window));
 301
 302         session_windows_.erase(session);
 303
 304         if (last_focused_session_ == session)
 305                 last_focused_session_.reset();
 306
 307         // Remove the session from our list of sessions (which also destroys it)
 308         sessions_.remove_if([&](shared_ptr<Session> s) {
 309                 return s == session; });
 310
 311         if (sessions_.empty()) {
 312                 // When there are no more tabs, the height of the QTabWidget
 313                 // drops to zero. We must prevent this to keep the static
 314                 // widgets visible
 315                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 316                         w->setMinimumHeight(h);
 317
 318                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 319                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 320                 session_selector_.setMinimumHeight(h + 2 * margin);
 321
 322                 // Update the window title if there is no view left to
 323                 // generate focus change events
 324                 setWindowTitle(WindowTitle);
 325         }
 326 }
 327
 328 void MainWindow::add_session_with_file(string open_file_name,
 329         string open_file_format)
 330 {
 331         shared_ptr<Session> session = add_session();
 332         session->load_init_file(open_file_name, open_file_format);
 333 }
 334
 335 void MainWindow::add_default_session()
 336 {
 337         // Only add the default session if there would be no session otherwise
 338         if (sessions_.size() > 0)
 339                 return;
 340
 341         shared_ptr<Session> session = add_session();
 342
 343         // Check the list of available devices. Prefer the one that was
 344         // found with user supplied scan specs (if applicable). Then try
 345         // one of the auto detected devices that are not the demo device.
 346         // Pick demo in the absence of "genuine" hardware devices.
 347         shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
 348         for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
 349                 if (dev == device_manager_.user_spec_device()) {
 350                         user_device = dev;
 351                 } else if (dev->hardware_device()->driver()->name() == "demo") {
 352                         demo_device = dev;
 353                 } else {
 354                         other_device = dev;
 355                 }
 356         }
 357         if (user_device)
 358                 session->select_device(user_device);
 359         else if (other_device)
 360                 session->select_device(other_device);
 361         else
 362                 session->select_device(demo_device);
 363 }
 364
 365 void MainWindow::save_sessions()
 366 {
 367         QSettings settings;
 368         int id = 0;
 369
 370         for (shared_ptr<Session> session : sessions_) {
 371                 // Ignore sessions using the demo device or no device at all
 372                 if (session->device()) {
 373                         shared_ptr<devices::HardwareDevice> device =
 374                                 dynamic_pointer_cast< devices::HardwareDevice >
 375                                 (session->device());
 376
 377                         if (device &&
 378                                 device->hardware_device()->driver()->name() == "demo")
 379                                 continue;
 380
 381                         settings.beginGroup("Session" + QString::number(id++));
 382                         settings.remove("");  // Remove all keys in this group
 383                         session->save_settings(settings);
 384                         settings.endGroup();
 385                 }
 386         }
 387
 388         settings.setValue("sessions", id);
 389 }
 390
 391 void MainWindow::restore_sessions()
 392 {
 393         QSettings settings;
 394         int i, session_count;
 395
 396         session_count = settings.value("sessions", 0).toInt();
 397
 398         for (i = 0; i < session_count; i++) {
 399                 settings.beginGroup("Session" + QString::number(i));
 400                 shared_ptr<Session> session = add_session();
 401                 session->restore_settings(settings);
 402                 settings.endGroup();
 403         }
 404 }
 405
 406 void MainWindow::on_setting_changed(const QString &key, const QVariant &value)
 407 {
 408         if (key == GlobalSettings::Key_View_ColouredBG)
 409                 on_settingViewColouredBg_changed(value);
 410
 411         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
 412                 on_settingViewShowSamplingPoints_changed(value);
 413
 414         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
 415                 on_settingViewShowAnalogMinorGrid_changed(value);
 416 }
 417
 418 void MainWindow::setup_ui()
 419 {
 420         setObjectName(QString::fromUtf8("MainWindow"));
 421
 422         setCentralWidget(&session_selector_);
 423
 424         // Set the window icon
 425         QIcon icon;
 426         icon.addFile(QString(":/icons/pulseview.png"));
 427         setWindowIcon(icon);
 428
 429         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 430         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 431
 432         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 433         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 434
 435         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 436         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 437
 438         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 439         view_coloured_bg_shortcut_->setAutoRepeat(false);
 440
 441         // Set up the tab area
 442         new_session_button_ = new QToolButton();
 443         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 444                 QIcon(":/icons/document-new.png")));
 445         new_session_button_->setToolTip(tr("Create New Session"));
 446         new_session_button_->setAutoRaise(true);
 447
 448         run_stop_button_ = new QToolButton();
 449         run_stop_button_->setAutoRaise(true);
 450         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 451         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 452
 453         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 454         run_stop_shortcut_->setAutoRepeat(false);
 455
 456         settings_button_ = new QToolButton();
 457         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 458                 QIcon(":/icons/preferences-system.png")));
 459         settings_button_->setToolTip(tr("Settings"));
 460         settings_button_->setAutoRaise(true);
 461
 462         QFrame *separator1 = new QFrame();
 463         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 464         QFrame *separator2 = new QFrame();
 465         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 466
 467         QHBoxLayout* layout = new QHBoxLayout();
 468         layout->setContentsMargins(2, 2, 2, 2);
 469         layout->addWidget(new_session_button_);
 470         layout->addWidget(separator1);
 471         layout->addWidget(run_stop_button_);
 472         layout->addWidget(separator2);
 473         layout->addWidget(settings_button_);
 474
 475         static_tab_widget_ = new QWidget();
 476         static_tab_widget_->setLayout(layout);
 477
 478         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 479         session_selector_.setTabsClosable(true);
 480
 481         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 482         close_application_shortcut_->setAutoRepeat(false);
 483
 484         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 485
 486         connect(new_session_button_, SIGNAL(clicked(bool)),
 487                 this, SLOT(on_new_session_clicked()));
 488         connect(run_stop_button_, SIGNAL(clicked(bool)),
 489                 this, SLOT(on_run_stop_clicked()));
 490         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 491                 this, SLOT(on_capture_state_changed(QObject*)));
 492         connect(settings_button_, SIGNAL(clicked(bool)),
 493                 this, SLOT(on_settings_clicked()));
 494
 495         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 496                 this, SLOT(on_tab_close_requested(int)));
 497         connect(&session_selector_, SIGNAL(currentChanged(int)),
 498                 this, SLOT(on_tab_changed(int)));
 499
 500
 501         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 502                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 503                 this, SLOT(on_focus_changed()));
 504 }
 505
 506 void MainWindow::save_ui_settings()
 507 {
 508         QSettings settings;
 509
 510         settings.beginGroup("MainWindow");
 511         settings.setValue("state", saveState());
 512         settings.setValue("geometry", saveGeometry());
 513         settings.endGroup();
 514 }
 515
 516 void MainWindow::restore_ui_settings()
 517 {
 518         QSettings settings;
 519
 520         settings.beginGroup("MainWindow");
 521
 522         if (settings.contains("geometry")) {
 523                 restoreGeometry(settings.value("geometry").toByteArray());
 524                 restoreState(settings.value("state").toByteArray());
 525         } else
 526                 resize(1000, 720);
 527
 528         settings.endGroup();
 529 }
 530
 531 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 532 {
 533         // Find the session that belongs to the tab's main window
 534         for (auto entry : session_windows_)
 535                 if (entry.second == session_selector_.widget(index))
 536                         return entry.first;
 537
 538         return nullptr;
 539 }
 540
 541 void MainWindow::closeEvent(QCloseEvent *event)
 542 {
 543         bool data_saved = true;
 544
 545         for (auto entry : session_windows_)
 546                 if (!entry.first->data_saved())
 547                         data_saved = false;
 548
 549         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 550                 tr("There is unsaved data. Close anyway?"),
 551                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 552                 event->ignore();
 553         } else {
 554                 save_ui_settings();
 555                 save_sessions();
 556                 event->accept();
 557         }
 558 }
 559
 560 QMenu* MainWindow::createPopupMenu()
 561 {
 562         return nullptr;
 563 }
 564
 565 bool MainWindow::restoreState(const QByteArray &state, int version)
 566 {
 567         (void)state;
 568         (void)version;
 569
 570         // Do nothing. We don't want Qt to handle this, or else it
 571         // will try to restore all the dock widgets and create havoc.
 572
 573         return false;
 574 }
 575
 576 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 577         Session *session)
 578 {
 579         // We get a pointer and need a reference
 580         for (shared_ptr<Session> s : sessions_)
 581                 if (s.get() == session)
 582                         add_view(title, type, *s);
 583 }
 584
 585 void MainWindow::on_focus_changed()
 586 {
 587         shared_ptr<views::ViewBase> view = get_active_view();
 588
 589         if (view) {
 590                 for (shared_ptr<Session> session : sessions_) {
 591                         if (session->has_view(view)) {
 592                                 if (session != last_focused_session_) {
 593                                         // Activate correct tab if necessary
 594                                         shared_ptr<Session> tab_session = get_tab_session(
 595                                                 session_selector_.currentIndex());
 596                                         if (tab_session != session)
 597                                                 session_selector_.setCurrentWidget(
 598                                                         session_windows_.at(session));
 599
 600                                         on_focused_session_changed(session);
 601                                 }
 602
 603                                 break;
 604                         }
 605                 }
 606         }
 607
 608         if (sessions_.empty())
 609                 setWindowTitle(WindowTitle);
 610 }
 611
 612 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 613 {
 614         last_focused_session_ = session;
 615
 616         setWindowTitle(session->name() + " - " + WindowTitle);
 617
 618         // Update the state of the run/stop button, too
 619         on_capture_state_changed(session.get());
 620 }
 621
 622 void MainWindow::on_new_session_clicked()
 623 {
 624         add_session();
 625 }
 626
 627 void MainWindow::on_run_stop_clicked()
 628 {
 629         shared_ptr<Session> session = last_focused_session_;
 630
 631         if (!session)
 632                 return;
 633
 634         switch (session->get_capture_state()) {
 635         case Session::Stopped:
 636                 session->start_capture([&](QString message) {
 637                         show_session_error("Capture failed", message); });
 638                 break;
 639         case Session::AwaitingTrigger:
 640         case Session::Running:
 641                 session->stop_capture();
 642                 break;
 643         }
 644 }
 645
 646 void MainWindow::on_settings_clicked()
 647 {
 648         dialogs::Settings dlg(device_manager_);
 649         dlg.exec();
 650 }
 651
 652 void MainWindow::on_session_name_changed()
 653 {
 654         // Update the corresponding dock widget's name(s)
 655         Session *session = qobject_cast<Session*>(QObject::sender());
 656         assert(session);
 657
 658         for (shared_ptr<views::ViewBase> view : session->views()) {
 659                 // Get the dock that contains the view
 660                 for (auto entry : view_docks_)
 661                         if (entry.second == view) {
 662                                 entry.first->setObjectName(session->name());
 663                                 entry.first->setWindowTitle(session->name());
 664                         }
 665         }
 666
 667         // Update the tab widget by finding the main window and the tab from that
 668         for (auto entry : session_windows_)
 669                 if (entry.first.get() == session) {
 670                         QMainWindow *window = entry.second;
 671                         const int index = session_selector_.indexOf(window);
 672                         session_selector_.setTabText(index, session->name());
 673                 }
 674
 675         // Refresh window title if the affected session has focus
 676         if (session == last_focused_session_.get())
 677                 setWindowTitle(session->name() + " - " + WindowTitle);
 678 }
 679
 680 void MainWindow::on_capture_state_changed(QObject *obj)
 681 {
 682         Session *caller = qobject_cast<Session*>(obj);
 683
 684         // Ignore if caller is not the currently focused session
 685         // unless there is only one session
 686         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 687                 return;
 688
 689         int state = caller->get_capture_state();
 690
 691         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 692         run_stop_button_->setIcon(*icons[state]);
 693         run_stop_button_->setText((state == pv::Session::Stopped) ?
 694                 tr("Run") : tr("Stop"));
 695 }
 696
 697 void MainWindow::on_new_view(Session *session)
 698 {
 699         // We get a pointer and need a reference
 700         for (shared_ptr<Session> s : sessions_)
 701                 if (s.get() == session)
 702                         add_view(session->name(), views::ViewTypeTrace, *s);
 703 }
 704
 705 void MainWindow::on_view_close_clicked()
 706 {
 707         // Find the dock widget that contains the close button that was clicked
 708         QObject *w = QObject::sender();
 709         QDockWidget *dock = nullptr;
 710
 711         while (w) {
 712             dock = qobject_cast<QDockWidget*>(w);
 713             if (dock)
 714                 break;
 715             w = w->parent();
 716         }
 717
 718         // Get the view contained in the dock widget
 719         shared_ptr<views::ViewBase> view;
 720
 721         for (auto entry : view_docks_)
 722                 if (entry.first == dock)
 723                         view = entry.second;
 724
 725         // Deregister the view
 726         for (shared_ptr<Session> session : sessions_) {
 727                 if (!session->has_view(view))
 728                         continue;
 729
 730                 // Also destroy the entire session if its main view is closing...
 731                 if (view == session->main_view()) {
 732                         // ...but only if data is saved or the user confirms closing
 733                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 734                                 tr("This session contains unsaved data. Close it anyway?"),
 735                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 736                                 remove_session(session);
 737                         break;
 738                 } else
 739                         // All other views can be closed at any time as no data will be lost
 740                         remove_view(view);
 741         }
 742 }
 743
 744 void MainWindow::on_tab_changed(int index)
 745 {
 746         shared_ptr<Session> session = get_tab_session(index);
 747
 748         if (session)
 749                 on_focused_session_changed(session);
 750 }
 751
 752 void MainWindow::on_tab_close_requested(int index)
 753 {
 754         shared_ptr<Session> session = get_tab_session(index);
 755
 756         if (!session)
 757                 return;
 758
 759         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 760                 tr("This session contains unsaved data. Close it anyway?"),
 761                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 762                 remove_session(session);
 763 }
 764
 765 void MainWindow::on_view_coloured_bg_shortcut()
 766 {
 767         GlobalSettings settings;
 768
 769         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
 770         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
 771 }
 772
 773 void MainWindow::on_view_sticky_scrolling_shortcut()
 774 {
 775         GlobalSettings settings;
 776
 777         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 778         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 779 }
 780
 781 void MainWindow::on_view_show_sampling_points_shortcut()
 782 {
 783         GlobalSettings settings;
 784
 785         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 786         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 787 }
 788
 789 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 790 {
 791         GlobalSettings settings;
 792
 793         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 794         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 795 }
 796
 797 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
 798 {
 799         bool state = new_value.toBool();
 800
 801         for (auto entry : view_docks_) {
 802                 shared_ptr<views::ViewBase> viewbase = entry.second;
 803
 804                 // Only trace views have this setting
 805                 views::trace::View* view =
 806                                 qobject_cast<views::trace::View*>(viewbase.get());
 807                 if (view)
 808                         view->enable_coloured_bg(state);
 809         }
 810 }
 811
 812 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
 813 {
 814         bool state = new_value.toBool();
 815
 816         for (auto entry : view_docks_) {
 817                 shared_ptr<views::ViewBase> viewbase = entry.second;
 818
 819                 // Only trace views have this setting
 820                 views::trace::View* view =
 821                                 qobject_cast<views::trace::View*>(viewbase.get());
 822                 if (view)
 823                         view->enable_show_sampling_points(state);
 824         }
 825 }
 826
 827 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
 828 {
 829         bool state = new_value.toBool();
 830
 831         for (auto entry : view_docks_) {
 832                 shared_ptr<views::ViewBase> viewbase = entry.second;
 833
 834                 // Only trace views have this setting
 835                 views::trace::View* view =
 836                                 qobject_cast<views::trace::View*>(viewbase.get());
 837                 if (view)
 838                         view->enable_show_analog_minor_grid(state);
 839         }
 840 }
 841
 842 void MainWindow::on_close_current_tab()
 843 {
 844         int tab = session_selector_.currentIndex();
 845
 846         on_tab_close_requested(tab);
 847 }
 848
 849 } // namespace pv