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 "application.hpp"
  44 #include "devicemanager.hpp"
  45 #include "devices/hardwaredevice.hpp"
  46 #include "dialogs/settings.hpp"
  47 #include "globalsettings.hpp"
  48 #include "toolbars/mainbar.hpp"
  49 #include "util.hpp"
  50 #include "views/trace/view.hpp"
  51 #include "views/trace/standardbar.hpp"
  52
  53 #ifdef ENABLE_DECODE
  54 #include "subwindows/decoder_selector/subwindow.hpp"
  55 #include "views/decoder_output/view.hpp"
  56 #endif
  57
  58 #include <libsigrokcxx/libsigrokcxx.hpp>
  59
  60 using std::dynamic_pointer_cast;
  61 using std::make_shared;
  62 using std::shared_ptr;
  63 using std::string;
  64
  65 namespace pv {
  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         icon_red_(":/icons/status-red.svg"),
  76         icon_green_(":/icons/status-green.svg"),
  77         icon_grey_(":/icons/status-grey.svg")
  78 {
  79         setup_ui();
  80         restore_ui_settings();
  81 }
  82
  83 MainWindow::~MainWindow()
  84 {
  85         // Make sure we no longer hold any shared pointers to widgets after the
  86         // destructor finishes (goes for sessions and sub windows alike)
  87
  88         while (!sessions_.empty())
  89                 remove_session(sessions_.front());
  90
  91         sub_windows_.clear();
  92 }
  93
  94 void MainWindow::show_session_error(const QString text, const QString info_text)
  95 {
  96         // TODO Emulate noquote()
  97         qDebug() << "Notifying user of session error:" << info_text;
  98
  99         QMessageBox msg;
 100         msg.setText(text + "\n\n" + info_text);
 101         msg.setStandardButtons(QMessageBox::Ok);
 102         msg.setIcon(QMessageBox::Warning);
 103         msg.exec();
 104 }
 105
 106 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 107 {
 108         // If there's only one view, use it...
 109         if (view_docks_.size() == 1)
 110                 return view_docks_.begin()->second;
 111
 112         // ...otherwise find the dock widget the widget with focus is contained in
 113         QObject *w = QApplication::focusWidget();
 114         QDockWidget *dock = nullptr;
 115
 116         while (w) {
 117                 dock = qobject_cast<QDockWidget*>(w);
 118                 if (dock)
 119                         break;
 120                 w = w->parent();
 121         }
 122
 123         // Get the view contained in the dock widget
 124         for (auto& entry : view_docks_)
 125                 if (entry.first == dock)
 126                         return entry.second;
 127
 128         return nullptr;
 129 }
 130
 131 shared_ptr<views::ViewBase> MainWindow::add_view(views::ViewType type,
 132         Session &session)
 133 {
 134         GlobalSettings settings;
 135         shared_ptr<views::ViewBase> v;
 136
 137         QMainWindow *main_window = nullptr;
 138         for (auto& entry : session_windows_)
 139                 if (entry.first.get() == &session)
 140                         main_window = entry.second;
 141
 142         assert(main_window);
 143
 144         shared_ptr<MainBar> main_bar = session.main_bar();
 145
 146         // Only use the view type in the name if it's not the main view
 147         QString title;
 148         if (main_bar)
 149                 title = QString("%1 (%2)").arg(session.name(), views::ViewTypeNames[type]);
 150         else
 151                 title = session.name();
 152
 153         QDockWidget* dock = new QDockWidget(title, main_window);
 154         dock->setObjectName(title);
 155         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 156
 157         // Insert a QMainWindow into the dock widget to allow for a tool bar
 158         QMainWindow *dock_main = new QMainWindow(dock);
 159         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 160
 161         if (type == views::ViewTypeTrace)
 162                 // This view will be the main view if there's no main bar yet
 163                 v = make_shared<views::trace::View>(session, (main_bar ? false : true), dock_main);
 164 #ifdef ENABLE_DECODE
 165         if (type == views::ViewTypeDecoderOutput)
 166                 v = make_shared<views::decoder_output::View>(session, false, dock_main);
 167 #endif
 168
 169         if (!v)
 170                 return nullptr;
 171
 172         view_docks_[dock] = v;
 173         session.register_view(v);
 174
 175         dock_main->setCentralWidget(v.get());
 176         dock->setWidget(dock_main);
 177
 178         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 179         dock->setFeatures(QDockWidget::DockWidgetMovable |
 180                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 181
 182         QAbstractButton *close_btn =
 183                 dock->findChildren<QAbstractButton*>("qt_dockwidget_closebutton")  // clazy:exclude=detaching-temporary
 184                         .front();
 185
 186         connect(close_btn, SIGNAL(clicked(bool)),
 187                 this, SLOT(on_view_close_clicked()));
 188
 189         connect(&session, SIGNAL(trigger_event(int, util::Timestamp)),
 190                 qobject_cast<views::ViewBase*>(v.get()),
 191                 SLOT(trigger_event(int, util::Timestamp)));
 192
 193         if (type == views::ViewTypeTrace) {
 194                 views::trace::View *tv =
 195                         qobject_cast<views::trace::View*>(v.get());
 196
 197                 if (!main_bar) {
 198                         /* Initial view, create the main bar */
 199                         main_bar = make_shared<MainBar>(session, this, tv);
 200                         dock_main->addToolBar(main_bar.get());
 201                         session.set_main_bar(main_bar);
 202
 203                         connect(main_bar.get(), SIGNAL(new_view(Session*, int)),
 204                                 this, SLOT(on_new_view(Session*, int)));
 205                         connect(main_bar.get(), SIGNAL(show_decoder_selector(Session*)),
 206                                 this, SLOT(on_show_decoder_selector(Session*)));
 207
 208                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 209
 210                         /* For the main view we need to prevent the dock widget from
 211                          * closing itself when its close button is clicked. This is
 212                          * so we can confirm with the user first. Regular views don't
 213                          * need this */
 214                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 215                 } else {
 216                         /* Additional view, create a standard bar */
 217                         pv::views::trace::StandardBar *standard_bar =
 218                                 new pv::views::trace::StandardBar(session, this, tv);
 219                         dock_main->addToolBar(standard_bar);
 220
 221                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 222                 }
 223         }
 224
 225         v->setFocus();
 226
 227         return v;
 228 }
 229
 230 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 231 {
 232         for (shared_ptr<Session> session : sessions_) {
 233                 if (!session->has_view(view))
 234                         continue;
 235
 236                 // Find the dock the view is contained in and remove it
 237                 for (auto& entry : view_docks_)
 238                         if (entry.second == view) {
 239                                 // Remove the view from the session
 240                                 session->deregister_view(view);
 241
 242                                 // Remove the view from its parent; otherwise, Qt will
 243                                 // call deleteLater() on it, which causes a double free
 244                                 // since the shared_ptr in view_docks_ doesn't know
 245                                 // that Qt keeps a pointer to the view around
 246                                 view->setParent(nullptr);
 247
 248                                 // Delete the view's dock widget and all widgets inside it
 249                                 entry.first->deleteLater();
 250
 251                                 // Remove the dock widget from the list and stop iterating
 252                                 view_docks_.erase(entry.first);
 253                                 break;
 254                         }
 255         }
 256 }
 257
 258 shared_ptr<subwindows::SubWindowBase> MainWindow::add_subwindow(
 259         subwindows::SubWindowType type, Session &session)
 260 {
 261         GlobalSettings settings;
 262         shared_ptr<subwindows::SubWindowBase> w;
 263
 264         QMainWindow *main_window = nullptr;
 265         for (auto& entry : session_windows_)
 266                 if (entry.first.get() == &session)
 267                         main_window = entry.second;
 268
 269         assert(main_window);
 270
 271         QString title = "";
 272
 273         switch (type) {
 274 #ifdef ENABLE_DECODE
 275                 case subwindows::SubWindowTypeDecoderSelector:
 276                         title = tr("Decoder Selector");
 277                         break;
 278 #endif
 279                 default:
 280                         break;
 281         }
 282
 283         QDockWidget* dock = new QDockWidget(title, main_window);
 284         dock->setObjectName(title);
 285         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 286
 287         // Insert a QMainWindow into the dock widget to allow for a tool bar
 288         QMainWindow *dock_main = new QMainWindow(dock);
 289         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 290
 291 #ifdef ENABLE_DECODE
 292         if (type == subwindows::SubWindowTypeDecoderSelector)
 293                 w = make_shared<subwindows::decoder_selector::SubWindow>(session, dock_main);
 294 #endif
 295
 296         if (!w)
 297                 return nullptr;
 298
 299         sub_windows_[dock] = w;
 300         dock_main->setCentralWidget(w.get());
 301         dock->setWidget(dock_main);
 302
 303         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 304         dock->setFeatures(QDockWidget::DockWidgetMovable |
 305                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 306
 307         QAbstractButton *close_btn =
 308                 dock->findChildren<QAbstractButton*>  // clazy:exclude=detaching-temporary
 309                         ("qt_dockwidget_closebutton").front();
 310
 311         // Allow all subwindows to be closed via ESC.
 312         close_btn->setShortcut(QKeySequence(Qt::Key_Escape));
 313
 314         connect(close_btn, SIGNAL(clicked(bool)),
 315                 this, SLOT(on_sub_window_close_clicked()));
 316
 317         if (w->has_toolbar())
 318                 dock_main->addToolBar(w->create_toolbar(dock_main));
 319
 320         if (w->minimum_width() > 0)
 321                 dock->setMinimumSize(w->minimum_width(), 0);
 322
 323         return w;
 324 }
 325
 326 shared_ptr<Session> MainWindow::add_session()
 327 {
 328         static int last_session_id = 1;
 329         QString name = tr("Session %1").arg(last_session_id++);
 330
 331         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 332
 333         connect(session.get(), SIGNAL(add_view(views::ViewType, Session*)),
 334                 this, SLOT(on_add_view(views::ViewType, Session*)));
 335         connect(session.get(), SIGNAL(name_changed()),
 336                 this, SLOT(on_session_name_changed()));
 337         connect(session.get(), SIGNAL(device_changed()),
 338                 this, SLOT(on_session_device_changed()));
 339         connect(session.get(), SIGNAL(capture_state_changed(int)),
 340                 this, SLOT(on_session_capture_state_changed(int)));
 341
 342         sessions_.push_back(session);
 343
 344         QMainWindow *window = new QMainWindow();
 345         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 346         session_windows_[session] = window;
 347
 348         int index = session_selector_.addTab(window, name);
 349         session_selector_.setCurrentIndex(index);
 350         last_focused_session_ = session;
 351
 352         window->setDockNestingEnabled(true);
 353
 354         add_view(views::ViewTypeTrace, *session);
 355
 356         return session;
 357 }
 358
 359 void MainWindow::remove_session(shared_ptr<Session> session)
 360 {
 361         // Determine the height of the button before it collapses
 362         int h = new_session_button_->height();
 363
 364         // Stop capture while the session still exists so that the UI can be
 365         // updated in case we're currently running. If so, this will schedule a
 366         // call to our on_capture_state_changed() slot for the next run of the
 367         // event loop. We need to have this executed immediately or else it will
 368         // be dismissed since the session object will be deleted by the time we
 369         // leave this method and the event loop gets a chance to run again.
 370         session->stop_capture();
 371         QApplication::processEvents();
 372
 373         for (const shared_ptr<views::ViewBase>& view : session->views())
 374                 remove_view(view);
 375
 376         QMainWindow *window = session_windows_.at(session);
 377         session_selector_.removeTab(session_selector_.indexOf(window));
 378
 379         session_windows_.erase(session);
 380
 381         if (last_focused_session_ == session)
 382                 last_focused_session_.reset();
 383
 384         // Remove the session from our list of sessions (which also destroys it)
 385         sessions_.remove_if([&](shared_ptr<Session> s) {
 386                 return s == session; });
 387
 388         if (sessions_.empty()) {
 389                 // When there are no more tabs, the height of the QTabWidget
 390                 // drops to zero. We must prevent this to keep the static
 391                 // widgets visible
 392                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())  // clazy:exclude=range-loop
 393                         w->setMinimumHeight(h);
 394
 395                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 396                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 397                 session_selector_.setMinimumHeight(h + 2 * margin);
 398
 399                 // Update the window title if there is no view left to
 400                 // generate focus change events
 401                 setWindowTitle(WindowTitle);
 402         }
 403 }
 404
 405 void MainWindow::add_session_with_file(string open_file_name,
 406         string open_file_format, string open_setup_file_name)
 407 {
 408         shared_ptr<Session> session = add_session();
 409         session->load_init_file(open_file_name, open_file_format, open_setup_file_name);
 410 }
 411
 412 void MainWindow::add_default_session()
 413 {
 414         // Only add the default session if there would be no session otherwise
 415         if (sessions_.size() > 0)
 416                 return;
 417
 418         shared_ptr<Session> session = add_session();
 419
 420         // Check the list of available devices. Prefer the one that was
 421         // found with user supplied scan specs (if applicable). Then try
 422         // one of the auto detected devices that are not the demo device.
 423         // Pick demo in the absence of "genuine" hardware devices.
 424         shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
 425         for (const shared_ptr<devices::HardwareDevice>& dev : device_manager_.devices()) {
 426                 if (dev == device_manager_.user_spec_device()) {
 427                         user_device = dev;
 428                 } else if (dev->hardware_device()->driver()->name() == "demo") {
 429                         demo_device = dev;
 430                 } else {
 431                         other_device = dev;
 432                 }
 433         }
 434         if (user_device)
 435                 session->select_device(user_device);
 436         else if (other_device)
 437                 session->select_device(other_device);
 438         else
 439                 session->select_device(demo_device);
 440 }
 441
 442 void MainWindow::save_sessions()
 443 {
 444         QSettings settings;
 445         int id = 0;
 446
 447         for (shared_ptr<Session>& session : sessions_) {
 448                 // Ignore sessions using the demo device or no device at all
 449                 if (session->device()) {
 450                         shared_ptr<devices::HardwareDevice> device =
 451                                 dynamic_pointer_cast< devices::HardwareDevice >
 452                                 (session->device());
 453
 454                         if (device &&
 455                                 device->hardware_device()->driver()->name() == "demo")
 456                                 continue;
 457
 458                         settings.beginGroup("Session" + QString::number(id++));
 459                         settings.remove("");  // Remove all keys in this group
 460                         session->save_settings(settings);
 461                         settings.endGroup();
 462                 }
 463         }
 464
 465         settings.setValue("sessions", id);
 466 }
 467
 468 void MainWindow::restore_sessions()
 469 {
 470         QSettings settings;
 471         int i, session_count;
 472
 473         session_count = settings.value("sessions", 0).toInt();
 474
 475         for (i = 0; i < session_count; i++) {
 476                 settings.beginGroup("Session" + QString::number(i));
 477                 shared_ptr<Session> session = add_session();
 478                 session->restore_settings(settings);
 479                 settings.endGroup();
 480         }
 481 }
 482
 483 void MainWindow::setup_ui()
 484 {
 485         setObjectName(QString::fromUtf8("MainWindow"));
 486
 487         setCentralWidget(&session_selector_);
 488
 489         // Set the window icon
 490         QIcon icon;
 491         icon.addFile(QString(":/icons/pulseview.png"));
 492         setWindowIcon(icon);
 493
 494         // Set up keyboard shortcuts that affect all views at once
 495         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 496         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 497
 498         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 499         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 500
 501         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 502         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 503
 504         view_colored_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_colored_bg_shortcut()));
 505         view_colored_bg_shortcut_->setAutoRepeat(false);
 506
 507         // Set up the tab area
 508         new_session_button_ = new QToolButton();
 509         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 510                 QIcon(":/icons/document-new.png")));
 511         new_session_button_->setToolTip(tr("Create New Session"));
 512         new_session_button_->setAutoRaise(true);
 513
 514         run_stop_button_ = new QToolButton();
 515         run_stop_button_->setAutoRaise(true);
 516         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 517         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 518
 519         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 520         run_stop_shortcut_->setAutoRepeat(false);
 521
 522         settings_button_ = new QToolButton();
 523         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 524                 QIcon(":/icons/preferences-system.png")));
 525         settings_button_->setToolTip(tr("Settings"));
 526         settings_button_->setAutoRaise(true);
 527
 528         QFrame *separator1 = new QFrame();
 529         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 530         QFrame *separator2 = new QFrame();
 531         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 532
 533         QHBoxLayout* layout = new QHBoxLayout();
 534         layout->setContentsMargins(2, 2, 2, 2);
 535         layout->addWidget(new_session_button_);
 536         layout->addWidget(separator1);
 537         layout->addWidget(run_stop_button_);
 538         layout->addWidget(separator2);
 539         layout->addWidget(settings_button_);
 540
 541         static_tab_widget_ = new QWidget();
 542         static_tab_widget_->setLayout(layout);
 543
 544         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 545         session_selector_.setTabsClosable(true);
 546
 547         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 548         close_application_shortcut_->setAutoRepeat(false);
 549
 550         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 551
 552         connect(new_session_button_, SIGNAL(clicked(bool)),
 553                 this, SLOT(on_new_session_clicked()));
 554         connect(run_stop_button_, SIGNAL(clicked(bool)),
 555                 this, SLOT(on_run_stop_clicked()));
 556         connect(settings_button_, SIGNAL(clicked(bool)),
 557                 this, SLOT(on_settings_clicked()));
 558
 559         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 560                 this, SLOT(on_tab_close_requested(int)));
 561         connect(&session_selector_, SIGNAL(currentChanged(int)),
 562                 this, SLOT(on_tab_changed(int)));
 563
 564
 565         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 566                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 567                 this, SLOT(on_focus_changed()));
 568 }
 569
 570 void MainWindow::update_acq_button(Session *session)
 571 {
 572         int state;
 573         QString run_caption;
 574
 575         if (session) {
 576                 state = session->get_capture_state();
 577                 run_caption = session->using_file_device() ? tr("Reload") : tr("Run");
 578         } else {
 579                 state = Session::Stopped;
 580                 run_caption = tr("Run");
 581         }
 582
 583         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 584         run_stop_button_->setIcon(*icons[state]);
 585         run_stop_button_->setText((state == pv::Session::Stopped) ?
 586                 run_caption : tr("Stop"));
 587 }
 588
 589 void MainWindow::save_ui_settings()
 590 {
 591         QSettings settings;
 592
 593         settings.beginGroup("MainWindow");
 594         settings.setValue("state", saveState());
 595         settings.setValue("geometry", saveGeometry());
 596         settings.endGroup();
 597 }
 598
 599 void MainWindow::restore_ui_settings()
 600 {
 601         QSettings settings;
 602
 603         settings.beginGroup("MainWindow");
 604
 605         if (settings.contains("geometry")) {
 606                 restoreGeometry(settings.value("geometry").toByteArray());
 607                 restoreState(settings.value("state").toByteArray());
 608         } else
 609                 resize(1000, 720);
 610
 611         settings.endGroup();
 612 }
 613
 614 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 615 {
 616         // Find the session that belongs to the tab's main window
 617         for (auto& entry : session_windows_)
 618                 if (entry.second == session_selector_.widget(index))
 619                         return entry.first;
 620
 621         return nullptr;
 622 }
 623
 624 void MainWindow::closeEvent(QCloseEvent *event)
 625 {
 626         bool data_saved = true;
 627
 628         for (auto& entry : session_windows_)
 629                 if (!entry.first->data_saved())
 630                         data_saved = false;
 631
 632         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 633                 tr("There is unsaved data. Close anyway?"),
 634                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 635                 event->ignore();
 636         } else {
 637                 save_ui_settings();
 638                 save_sessions();
 639                 event->accept();
 640         }
 641 }
 642
 643 QMenu* MainWindow::createPopupMenu()
 644 {
 645         return nullptr;
 646 }
 647
 648 bool MainWindow::restoreState(const QByteArray &state, int version)
 649 {
 650         (void)state;
 651         (void)version;
 652
 653         // Do nothing. We don't want Qt to handle this, or else it
 654         // will try to restore all the dock widgets and create havoc.
 655
 656         return false;
 657 }
 658
 659 void MainWindow::on_add_view(views::ViewType type, Session *session)
 660 {
 661         // We get a pointer and need a reference
 662         for (shared_ptr<Session>& s : sessions_)
 663                 if (s.get() == session)
 664                         add_view(type, *s);
 665 }
 666
 667 void MainWindow::on_focus_changed()
 668 {
 669         shared_ptr<views::ViewBase> view = get_active_view();
 670
 671         if (view) {
 672                 for (shared_ptr<Session> session : sessions_) {
 673                         if (session->has_view(view)) {
 674                                 if (session != last_focused_session_) {
 675                                         // Activate correct tab if necessary
 676                                         shared_ptr<Session> tab_session = get_tab_session(
 677                                                 session_selector_.currentIndex());
 678                                         if (tab_session != session)
 679                                                 session_selector_.setCurrentWidget(
 680                                                         session_windows_.at(session));
 681
 682                                         on_focused_session_changed(session);
 683                                 }
 684
 685                                 break;
 686                         }
 687                 }
 688         }
 689
 690         if (sessions_.empty())
 691                 setWindowTitle(WindowTitle);
 692 }
 693
 694 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 695 {
 696         last_focused_session_ = session;
 697
 698         setWindowTitle(session->name() + " - " + WindowTitle);
 699
 700         // Update the state of the run/stop button, too
 701         update_acq_button(session.get());
 702 }
 703
 704 void MainWindow::on_new_session_clicked()
 705 {
 706         add_session();
 707 }
 708
 709 void MainWindow::on_run_stop_clicked()
 710 {
 711         shared_ptr<Session> session = last_focused_session_;
 712
 713         if (!session)
 714                 return;
 715
 716         switch (session->get_capture_state()) {
 717         case Session::Stopped:
 718                 session->start_capture([&](QString message) {
 719                         show_session_error("Capture failed", message); });
 720                 break;
 721         case Session::AwaitingTrigger:
 722         case Session::Running:
 723                 session->stop_capture();
 724                 break;
 725         }
 726 }
 727
 728 void MainWindow::on_settings_clicked()
 729 {
 730         dialogs::Settings dlg(device_manager_);
 731         dlg.exec();
 732 }
 733
 734 void MainWindow::on_session_name_changed()
 735 {
 736         // Update the corresponding dock widget's name(s)
 737         Session *session = qobject_cast<Session*>(QObject::sender());
 738         assert(session);
 739
 740         for (const shared_ptr<views::ViewBase>& view : session->views()) {
 741                 // Get the dock that contains the view
 742                 for (auto& entry : view_docks_)
 743                         if (entry.second == view) {
 744                                 entry.first->setObjectName(session->name());
 745                                 entry.first->setWindowTitle(session->name());
 746                         }
 747         }
 748
 749         // Update the tab widget by finding the main window and the tab from that
 750         for (auto& entry : session_windows_)
 751                 if (entry.first.get() == session) {
 752                         QMainWindow *window = entry.second;
 753                         const int index = session_selector_.indexOf(window);
 754                         session_selector_.setTabText(index, session->name());
 755                 }
 756
 757         // Refresh window title if the affected session has focus
 758         if (session == last_focused_session_.get())
 759                 setWindowTitle(session->name() + " - " + WindowTitle);
 760 }
 761
 762 void MainWindow::on_session_device_changed()
 763 {
 764         Session *session = qobject_cast<Session*>(QObject::sender());
 765         assert(session);
 766
 767         // Ignore if caller is not the currently focused session
 768         // unless there is only one session
 769         if ((sessions_.size() > 1) && (session != last_focused_session_.get()))
 770                 return;
 771
 772         update_acq_button(session);
 773 }
 774
 775 void MainWindow::on_session_capture_state_changed(int state)
 776 {
 777         (void)state;
 778
 779         Session *session = qobject_cast<Session*>(QObject::sender());
 780         assert(session);
 781
 782         // Ignore if caller is not the currently focused session
 783         // unless there is only one session
 784         if ((sessions_.size() > 1) && (session != last_focused_session_.get()))
 785                 return;
 786
 787         update_acq_button(session);
 788 }
 789
 790 void MainWindow::on_new_view(Session *session, int view_type)
 791 {
 792         // We get a pointer and need a reference
 793         for (shared_ptr<Session>& s : sessions_)
 794                 if (s.get() == session)
 795                         add_view((views::ViewType)view_type, *s);
 796 }
 797
 798 void MainWindow::on_view_close_clicked()
 799 {
 800         // Find the dock widget that contains the close button that was clicked
 801         QObject *w = QObject::sender();
 802         QDockWidget *dock = nullptr;
 803
 804         while (w) {
 805             dock = qobject_cast<QDockWidget*>(w);
 806             if (dock)
 807                 break;
 808             w = w->parent();
 809         }
 810
 811         // Get the view contained in the dock widget
 812         shared_ptr<views::ViewBase> view;
 813
 814         for (auto& entry : view_docks_)
 815                 if (entry.first == dock)
 816                         view = entry.second;
 817
 818         // Deregister the view
 819         for (shared_ptr<Session> session : sessions_) {
 820                 if (!session->has_view(view))
 821                         continue;
 822
 823                 // Also destroy the entire session if its main view is closing...
 824                 if (view == session->main_view()) {
 825                         // ...but only if data is saved or the user confirms closing
 826                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 827                                 tr("This session contains unsaved data. Close it anyway?"),
 828                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 829                                 remove_session(session);
 830                         break;
 831                 } else
 832                         // All other views can be closed at any time as no data will be lost
 833                         remove_view(view);
 834         }
 835 }
 836
 837 void MainWindow::on_tab_changed(int index)
 838 {
 839         shared_ptr<Session> session = get_tab_session(index);
 840
 841         if (session)
 842                 on_focused_session_changed(session);
 843 }
 844
 845 void MainWindow::on_tab_close_requested(int index)
 846 {
 847         shared_ptr<Session> session = get_tab_session(index);
 848
 849         if (!session)
 850                 return;
 851
 852         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 853                 tr("This session contains unsaved data. Close it anyway?"),
 854                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 855                 remove_session(session);
 856
 857         if (sessions_.empty())
 858                 update_acq_button(nullptr);
 859 }
 860
 861 void MainWindow::on_show_decoder_selector(Session *session)
 862 {
 863 #ifdef ENABLE_DECODE
 864         // Close dock widget if it's already showing and return
 865         for (auto& entry : sub_windows_) {
 866                 QDockWidget* dock = entry.first;
 867                 shared_ptr<subwindows::SubWindowBase> decoder_selector =
 868                         dynamic_pointer_cast<subwindows::decoder_selector::SubWindow>(entry.second);
 869
 870                 if (decoder_selector && (&decoder_selector->session() == session)) {
 871                         sub_windows_.erase(dock);
 872                         dock->close();
 873                         return;
 874                 }
 875         }
 876
 877         // We get a pointer and need a reference
 878         for (shared_ptr<Session>& s : sessions_)
 879                 if (s.get() == session)
 880                         add_subwindow(subwindows::SubWindowTypeDecoderSelector, *s);
 881 #endif
 882 }
 883
 884 void MainWindow::on_sub_window_close_clicked()
 885 {
 886         // Find the dock widget that contains the close button that was clicked
 887         QObject *w = QObject::sender();
 888         QDockWidget *dock = nullptr;
 889
 890         while (w) {
 891             dock = qobject_cast<QDockWidget*>(w);
 892             if (dock)
 893                 break;
 894             w = w->parent();
 895         }
 896
 897         sub_windows_.erase(dock);
 898         dock->close();
 899
 900         // Restore focus to the last used main view
 901         if (last_focused_session_)
 902                 last_focused_session_->main_view()->setFocus();
 903 }
 904
 905 void MainWindow::on_view_colored_bg_shortcut()
 906 {
 907         GlobalSettings settings;
 908
 909         bool state = settings.value(GlobalSettings::Key_View_ColoredBG).toBool();
 910         settings.setValue(GlobalSettings::Key_View_ColoredBG, !state);
 911 }
 912
 913 void MainWindow::on_view_sticky_scrolling_shortcut()
 914 {
 915         GlobalSettings settings;
 916
 917         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 918         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 919 }
 920
 921 void MainWindow::on_view_show_sampling_points_shortcut()
 922 {
 923         GlobalSettings settings;
 924
 925         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 926         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 927 }
 928
 929 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 930 {
 931         GlobalSettings settings;
 932
 933         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 934         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 935 }
 936
 937 void MainWindow::on_close_current_tab()
 938 {
 939         int tab = session_selector_.currentIndex();
 940
 941         on_tab_close_requested(tab);
 942 }
 943
 944 } // namespace pv