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