pv/mainwindow.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifdef ENABLE_DECODE
  21 #include <libsigrokdecode/libsigrokdecode.h>
  22 #endif
  23
  24 #include <algorithm>
  25 #include <cassert>
  26 #include <cstdarg>
  27 #include <cstdint>
  28 #include <iterator>
  29
  30 #include <QAction>
  31 #include <QApplication>
  32 #include <QCloseEvent>
  33 #include <QDebug>
  34 #include <QDockWidget>
  35 #include <QHBoxLayout>
  36 #include <QMessageBox>
  37 #include <QSettings>
  38 #include <QShortcut>
  39 #include <QWidget>
  40
  41 #include "mainwindow.hpp"
  42
  43 #include "devicemanager.hpp"
  44 #include "devices/hardwaredevice.hpp"
  45 #include "dialogs/settings.hpp"
  46 #include "globalsettings.hpp"
  47 #include "toolbars/mainbar.hpp"
  48 #include "util.hpp"
  49 #include "views/trace/view.hpp"
  50 #include "views/trace/standardbar.hpp"
  51
  52 #include <libsigrokcxx/libsigrokcxx.hpp>
  53
  54 using std::dynamic_pointer_cast;
  55 using std::make_shared;
  56 using std::shared_ptr;
  57 using std::string;
  58
  59 namespace pv {
  60
  61 namespace view {
  62 class ViewItem;
  63 }
  64
  65 using toolbars::MainBar;
  66
  67 const QString MainWindow::WindowTitle = tr("PulseView");
  68
  69 MainWindow::MainWindow(DeviceManager &device_manager, QWidget *parent) :
  70         QMainWindow(parent),
  71         device_manager_(device_manager),
  72         session_selector_(this),
  73         session_state_mapper_(this),
  74         icon_red_(":/icons/status-red.svg"),
  75         icon_green_(":/icons/status-green.svg"),
  76         icon_grey_(":/icons/status-grey.svg")
  77 {
  78         GlobalSettings::add_change_handler(this);
  79
  80         setup_ui();
  81         restore_ui_settings();
  82 }
  83
  84 MainWindow::~MainWindow()
  85 {
  86         GlobalSettings::remove_change_handler(this);
  87
  88         while (!sessions_.empty())
  89                 remove_session(sessions_.front());
  90 }
  91
  92 void MainWindow::show_session_error(const QString text, const QString info_text)
  93 {
  94         // TODO Emulate noquote()
  95         qDebug() << "Notifying user of session error:" << info_text;
  96
  97         QMessageBox msg;
  98         msg.setText(text);
  99         msg.setInformativeText(info_text);
 100         msg.setStandardButtons(QMessageBox::Ok);
 101         msg.setIcon(QMessageBox::Warning);
 102         msg.exec();
 103 }
 104
 105 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 106 {
 107         // If there's only one view, use it...
 108         if (view_docks_.size() == 1)
 109                 return view_docks_.begin()->second;
 110
 111         // ...otherwise find the dock widget the widget with focus is contained in
 112         QObject *w = QApplication::focusWidget();
 113         QDockWidget *dock = nullptr;
 114
 115         while (w) {
 116                 dock = qobject_cast<QDockWidget*>(w);
 117                 if (dock)
 118                         break;
 119                 w = w->parent();
 120         }
 121
 122         // Get the view contained in the dock widget
 123         for (auto& entry : view_docks_)
 124                 if (entry.first == dock)
 125                         return entry.second;
 126
 127         return nullptr;
 128 }
 129
 130 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 131         views::ViewType type, Session &session)
 132 {
 133         GlobalSettings settings;
 134         shared_ptr<views::ViewBase> v;
 135
 136         QMainWindow *main_window = nullptr;
 137         for (auto& entry : session_windows_)
 138                 if (entry.first.get() == &session)
 139                         main_window = entry.second;
 140
 141         assert(main_window);
 142
 143         shared_ptr<MainBar> main_bar = session.main_bar();
 144
 145         QDockWidget* dock = new QDockWidget(title, main_window);
 146         dock->setObjectName(title);
 147         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 148
 149         // Insert a QMainWindow into the dock widget to allow for a tool bar
 150         QMainWindow *dock_main = new QMainWindow(dock);
 151         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 152
 153         if (type == views::ViewTypeTrace)
 154                 // This view will be the main view if there's no main bar yet
 155                 v = make_shared<views::trace::View>(session,
 156                         (main_bar ? false : true), dock_main);
 157
 158         if (!v)
 159                 return nullptr;
 160
 161         view_docks_[dock] = v;
 162         session.register_view(v);
 163
 164         dock_main->setCentralWidget(v.get());
 165         dock->setWidget(dock_main);
 166
 167         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 168         dock->setFeatures(QDockWidget::DockWidgetMovable |
 169                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 170
 171         QAbstractButton *close_btn =
 172                 dock->findChildren<QAbstractButton*>("qt_dockwidget_closebutton")  // clazy:exclude=detaching-temporary
 173                         .front();
 174
 175         connect(close_btn, SIGNAL(clicked(bool)),
 176                 this, SLOT(on_view_close_clicked()));
 177
 178         connect(&session, SIGNAL(trigger_event(int, util::Timestamp)),
 179                 qobject_cast<views::ViewBase*>(v.get()),
 180                 SLOT(trigger_event(int, util::Timestamp)));
 181
 182         if (type == views::ViewTypeTrace) {
 183                 views::trace::View *tv =
 184                         qobject_cast<views::trace::View*>(v.get());
 185
 186                 tv->enable_colored_bg(settings.value(GlobalSettings::Key_View_ColoredBG).toBool());
 187                 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
 188                 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
 189
 190                 if (!main_bar) {
 191                         /* Initial view, create the main bar */
 192                         main_bar = make_shared<MainBar>(session, this, tv);
 193                         dock_main->addToolBar(main_bar.get());
 194                         session.set_main_bar(main_bar);
 195
 196                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 197                                 this, SLOT(on_new_view(Session*)));
 198
 199                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 200
 201                         /* For the main view we need to prevent the dock widget from
 202                          * closing itself when its close button is clicked. This is
 203                          * so we can confirm with the user first. Regular views don't
 204                          * need this */
 205                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 206                 } else {
 207                         /* Additional view, create a standard bar */
 208                         pv::views::trace::StandardBar *standard_bar =
 209                                 new pv::views::trace::StandardBar(session, this, tv);
 210                         dock_main->addToolBar(standard_bar);
 211
 212                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 213                 }
 214         }
 215
 216         return v;
 217 }
 218
 219 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 220 {
 221         for (shared_ptr<Session> session : sessions_) {
 222                 if (!session->has_view(view))
 223                         continue;
 224
 225                 // Find the dock the view is contained in and remove it
 226                 for (auto& entry : view_docks_)
 227                         if (entry.second == view) {
 228                                 // Remove the view from the session
 229                                 session->deregister_view(view);
 230
 231                                 // Remove the view from its parent; otherwise, Qt will
 232                                 // call deleteLater() on it, which causes a double free
 233                                 // since the shared_ptr in view_docks_ doesn't know
 234                                 // that Qt keeps a pointer to the view around
 235                                 view->setParent(nullptr);
 236
 237                                 // Delete the view's dock widget and all widgets inside it
 238                                 entry.first->deleteLater();
 239
 240                                 // Remove the dock widget from the list and stop iterating
 241                                 view_docks_.erase(entry.first);
 242                                 break;
 243                         }
 244         }
 245 }
 246
 247 shared_ptr<Session> MainWindow::add_session()
 248 {
 249         static int last_session_id = 1;
 250         QString name = tr("Session %1").arg(last_session_id++);
 251
 252         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 253
 254         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 255                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 256         connect(session.get(), SIGNAL(name_changed()),
 257                 this, SLOT(on_session_name_changed()));
 258         session_state_mapper_.setMapping(session.get(), session.get());
 259         connect(session.get(), SIGNAL(capture_state_changed(int)),
 260                 &session_state_mapper_, SLOT(map()));
 261
 262         sessions_.push_back(session);
 263
 264         QMainWindow *window = new QMainWindow();
 265         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 266         session_windows_[session] = window;
 267
 268         int index = session_selector_.addTab(window, name);
 269         session_selector_.setCurrentIndex(index);
 270         last_focused_session_ = session;
 271
 272         window->setDockNestingEnabled(true);
 273
 274         shared_ptr<views::ViewBase> main_view =
 275                 add_view(name, views::ViewTypeTrace, *session);
 276
 277         return session;
 278 }
 279
 280 void MainWindow::remove_session(shared_ptr<Session> session)
 281 {
 282         // Determine the height of the button before it collapses
 283         int h = new_session_button_->height();
 284
 285         // Stop capture while the session still exists so that the UI can be
 286         // updated in case we're currently running. If so, this will schedule a
 287         // call to our on_capture_state_changed() slot for the next run of the
 288         // event loop. We need to have this executed immediately or else it will
 289         // be dismissed since the session object will be deleted by the time we
 290         // leave this method and the event loop gets a chance to run again.
 291         session->stop_capture();
 292         QApplication::processEvents();
 293
 294         for (const shared_ptr<views::ViewBase>& view : session->views())
 295                 remove_view(view);
 296
 297         QMainWindow *window = session_windows_.at(session);
 298         session_selector_.removeTab(session_selector_.indexOf(window));
 299
 300         session_windows_.erase(session);
 301
 302         if (last_focused_session_ == session)
 303                 last_focused_session_.reset();
 304
 305         // Remove the session from our list of sessions (which also destroys it)
 306         sessions_.remove_if([&](shared_ptr<Session> s) {
 307                 return s == session; });
 308
 309         if (sessions_.empty()) {
 310                 // When there are no more tabs, the height of the QTabWidget
 311                 // drops to zero. We must prevent this to keep the static
 312                 // widgets visible
 313                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())  // clazy:exclude=range-loop
 314                         w->setMinimumHeight(h);
 315
 316                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 317                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 318                 session_selector_.setMinimumHeight(h + 2 * margin);
 319
 320                 // Update the window title if there is no view left to
 321                 // generate focus change events
 322                 setWindowTitle(WindowTitle);
 323         }
 324 }
 325
 326 void MainWindow::add_session_with_file(string open_file_name,
 327         string open_file_format)
 328 {
 329         shared_ptr<Session> session = add_session();
 330         session->load_init_file(open_file_name, open_file_format);
 331 }
 332
 333 void MainWindow::add_default_session()
 334 {
 335         // Only add the default session if there would be no session otherwise
 336         if (sessions_.size() > 0)
 337                 return;
 338
 339         shared_ptr<Session> session = add_session();
 340
 341         // Check the list of available devices. Prefer the one that was
 342         // found with user supplied scan specs (if applicable). Then try
 343         // one of the auto detected devices that are not the demo device.
 344         // Pick demo in the absence of "genuine" hardware devices.
 345         shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
 346         for (const shared_ptr<devices::HardwareDevice>& dev : device_manager_.devices()) {
 347                 if (dev == device_manager_.user_spec_device()) {
 348                         user_device = dev;
 349                 } else if (dev->hardware_device()->driver()->name() == "demo") {
 350                         demo_device = dev;
 351                 } else {
 352                         other_device = dev;
 353                 }
 354         }
 355         if (user_device)
 356                 session->select_device(user_device);
 357         else if (other_device)
 358                 session->select_device(other_device);
 359         else
 360                 session->select_device(demo_device);
 361 }
 362
 363 void MainWindow::save_sessions()
 364 {
 365         QSettings settings;
 366         int id = 0;
 367
 368         for (shared_ptr<Session>& session : sessions_) {
 369                 // Ignore sessions using the demo device or no device at all
 370                 if (session->device()) {
 371                         shared_ptr<devices::HardwareDevice> device =
 372                                 dynamic_pointer_cast< devices::HardwareDevice >
 373                                 (session->device());
 374
 375                         if (device &&
 376                                 device->hardware_device()->driver()->name() == "demo")
 377                                 continue;
 378
 379                         settings.beginGroup("Session" + QString::number(id++));
 380                         settings.remove("");  // Remove all keys in this group
 381                         session->save_settings(settings);
 382                         settings.endGroup();
 383                 }
 384         }
 385
 386         settings.setValue("sessions", id);
 387 }
 388
 389 void MainWindow::restore_sessions()
 390 {
 391         QSettings settings;
 392         int i, session_count;
 393
 394         session_count = settings.value("sessions", 0).toInt();
 395
 396         for (i = 0; i < session_count; i++) {
 397                 settings.beginGroup("Session" + QString::number(i));
 398                 shared_ptr<Session> session = add_session();
 399                 session->restore_settings(settings);
 400                 settings.endGroup();
 401         }
 402 }
 403
 404 void MainWindow::on_setting_changed(const QString &key, const QVariant &value)
 405 {
 406         if (key == GlobalSettings::Key_View_ColoredBG)
 407                 on_settingViewColoredBg_changed(value);
 408
 409         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
 410                 on_settingViewShowSamplingPoints_changed(value);
 411
 412         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
 413                 on_settingViewShowAnalogMinorGrid_changed(value);
 414 }
 415
 416 void MainWindow::setup_ui()
 417 {
 418         setObjectName(QString::fromUtf8("MainWindow"));
 419
 420         setCentralWidget(&session_selector_);
 421
 422         // Set the window icon
 423         QIcon icon;
 424         icon.addFile(QString(":/icons/pulseview.png"));
 425         setWindowIcon(icon);
 426
 427         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 428         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 429
 430         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 431         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 432
 433         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 434         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 435
 436         view_colored_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_colored_bg_shortcut()));
 437         view_colored_bg_shortcut_->setAutoRepeat(false);
 438
 439         // Set up the tab area
 440         new_session_button_ = new QToolButton();
 441         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 442                 QIcon(":/icons/document-new.png")));
 443         new_session_button_->setToolTip(tr("Create New Session"));
 444         new_session_button_->setAutoRaise(true);
 445
 446         run_stop_button_ = new QToolButton();
 447         run_stop_button_->setAutoRaise(true);
 448         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 449         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 450
 451         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 452         run_stop_shortcut_->setAutoRepeat(false);
 453
 454         settings_button_ = new QToolButton();
 455         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 456                 QIcon(":/icons/preferences-system.png")));
 457         settings_button_->setToolTip(tr("Settings"));
 458         settings_button_->setAutoRaise(true);
 459
 460         QFrame *separator1 = new QFrame();
 461         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 462         QFrame *separator2 = new QFrame();
 463         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 464
 465         QHBoxLayout* layout = new QHBoxLayout();
 466         layout->setContentsMargins(2, 2, 2, 2);
 467         layout->addWidget(new_session_button_);
 468         layout->addWidget(separator1);
 469         layout->addWidget(run_stop_button_);
 470         layout->addWidget(separator2);
 471         layout->addWidget(settings_button_);
 472
 473         static_tab_widget_ = new QWidget();
 474         static_tab_widget_->setLayout(layout);
 475
 476         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 477         session_selector_.setTabsClosable(true);
 478
 479         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 480         close_application_shortcut_->setAutoRepeat(false);
 481
 482         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 483
 484         connect(new_session_button_, SIGNAL(clicked(bool)),
 485                 this, SLOT(on_new_session_clicked()));
 486         connect(run_stop_button_, SIGNAL(clicked(bool)),
 487                 this, SLOT(on_run_stop_clicked()));
 488         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 489                 this, SLOT(on_capture_state_changed(QObject*)));
 490         connect(settings_button_, SIGNAL(clicked(bool)),
 491                 this, SLOT(on_settings_clicked()));
 492
 493         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 494                 this, SLOT(on_tab_close_requested(int)));
 495         connect(&session_selector_, SIGNAL(currentChanged(int)),
 496                 this, SLOT(on_tab_changed(int)));
 497
 498
 499         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 500                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 501                 this, SLOT(on_focus_changed()));
 502 }
 503
 504 void MainWindow::save_ui_settings()
 505 {
 506         QSettings settings;
 507
 508         settings.beginGroup("MainWindow");
 509         settings.setValue("state", saveState());
 510         settings.setValue("geometry", saveGeometry());
 511         settings.endGroup();
 512 }
 513
 514 void MainWindow::restore_ui_settings()
 515 {
 516         QSettings settings;
 517
 518         settings.beginGroup("MainWindow");
 519
 520         if (settings.contains("geometry")) {
 521                 restoreGeometry(settings.value("geometry").toByteArray());
 522                 restoreState(settings.value("state").toByteArray());
 523         } else
 524                 resize(1000, 720);
 525
 526         settings.endGroup();
 527 }
 528
 529 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 530 {
 531         // Find the session that belongs to the tab's main window
 532         for (auto& entry : session_windows_)
 533                 if (entry.second == session_selector_.widget(index))
 534                         return entry.first;
 535
 536         return nullptr;
 537 }
 538
 539 void MainWindow::closeEvent(QCloseEvent *event)
 540 {
 541         bool data_saved = true;
 542
 543         for (auto& entry : session_windows_)
 544                 if (!entry.first->data_saved())
 545                         data_saved = false;
 546
 547         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 548                 tr("There is unsaved data. Close anyway?"),
 549                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 550                 event->ignore();
 551         } else {
 552                 save_ui_settings();
 553                 save_sessions();
 554                 event->accept();
 555         }
 556 }
 557
 558 QMenu* MainWindow::createPopupMenu()
 559 {
 560         return nullptr;
 561 }
 562
 563 bool MainWindow::restoreState(const QByteArray &state, int version)
 564 {
 565         (void)state;
 566         (void)version;
 567
 568         // Do nothing. We don't want Qt to handle this, or else it
 569         // will try to restore all the dock widgets and create havoc.
 570
 571         return false;
 572 }
 573
 574 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 575         Session *session)
 576 {
 577         // We get a pointer and need a reference
 578         for (shared_ptr<Session>& s : sessions_)
 579                 if (s.get() == session)
 580                         add_view(title, type, *s);
 581 }
 582
 583 void MainWindow::on_focus_changed()
 584 {
 585         shared_ptr<views::ViewBase> view = get_active_view();
 586
 587         if (view) {
 588                 for (shared_ptr<Session> session : sessions_) {
 589                         if (session->has_view(view)) {
 590                                 if (session != last_focused_session_) {
 591                                         // Activate correct tab if necessary
 592                                         shared_ptr<Session> tab_session = get_tab_session(
 593                                                 session_selector_.currentIndex());
 594                                         if (tab_session != session)
 595                                                 session_selector_.setCurrentWidget(
 596                                                         session_windows_.at(session));
 597
 598                                         on_focused_session_changed(session);
 599                                 }
 600
 601                                 break;
 602                         }
 603                 }
 604         }
 605
 606         if (sessions_.empty())
 607                 setWindowTitle(WindowTitle);
 608 }
 609
 610 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 611 {
 612         last_focused_session_ = session;
 613
 614         setWindowTitle(session->name() + " - " + WindowTitle);
 615
 616         // Update the state of the run/stop button, too
 617         on_capture_state_changed(session.get());
 618 }
 619
 620 void MainWindow::on_new_session_clicked()
 621 {
 622         add_session();
 623 }
 624
 625 void MainWindow::on_run_stop_clicked()
 626 {
 627         shared_ptr<Session> session = last_focused_session_;
 628
 629         if (!session)
 630                 return;
 631
 632         switch (session->get_capture_state()) {
 633         case Session::Stopped:
 634                 session->start_capture([&](QString message) {
 635                         show_session_error("Capture failed", message); });
 636                 break;
 637         case Session::AwaitingTrigger:
 638         case Session::Running:
 639                 session->stop_capture();
 640                 break;
 641         }
 642 }
 643
 644 void MainWindow::on_settings_clicked()
 645 {
 646         dialogs::Settings dlg(device_manager_);
 647         dlg.exec();
 648 }
 649
 650 void MainWindow::on_session_name_changed()
 651 {
 652         // Update the corresponding dock widget's name(s)
 653         Session *session = qobject_cast<Session*>(QObject::sender());
 654         assert(session);
 655
 656         for (const shared_ptr<views::ViewBase>& view : session->views()) {
 657                 // Get the dock that contains the view
 658                 for (auto& entry : view_docks_)
 659                         if (entry.second == view) {
 660                                 entry.first->setObjectName(session->name());
 661                                 entry.first->setWindowTitle(session->name());
 662                         }
 663         }
 664
 665         // Update the tab widget by finding the main window and the tab from that
 666         for (auto& entry : session_windows_)
 667                 if (entry.first.get() == session) {
 668                         QMainWindow *window = entry.second;
 669                         const int index = session_selector_.indexOf(window);
 670                         session_selector_.setTabText(index, session->name());
 671                 }
 672
 673         // Refresh window title if the affected session has focus
 674         if (session == last_focused_session_.get())
 675                 setWindowTitle(session->name() + " - " + WindowTitle);
 676 }
 677
 678 void MainWindow::on_capture_state_changed(QObject *obj)
 679 {
 680         Session *caller = qobject_cast<Session*>(obj);
 681
 682         // Ignore if caller is not the currently focused session
 683         // unless there is only one session
 684         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 685                 return;
 686
 687         int state = caller->get_capture_state();
 688
 689         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 690         run_stop_button_->setIcon(*icons[state]);
 691         run_stop_button_->setText((state == pv::Session::Stopped) ?
 692                 tr("Run") : tr("Stop"));
 693 }
 694
 695 void MainWindow::on_new_view(Session *session)
 696 {
 697         // We get a pointer and need a reference
 698         for (shared_ptr<Session>& s : sessions_)
 699                 if (s.get() == session)
 700                         add_view(session->name(), views::ViewTypeTrace, *s);
 701 }
 702
 703 void MainWindow::on_view_close_clicked()
 704 {
 705         // Find the dock widget that contains the close button that was clicked
 706         QObject *w = QObject::sender();
 707         QDockWidget *dock = nullptr;
 708
 709         while (w) {
 710             dock = qobject_cast<QDockWidget*>(w);
 711             if (dock)
 712                 break;
 713             w = w->parent();
 714         }
 715
 716         // Get the view contained in the dock widget
 717         shared_ptr<views::ViewBase> view;
 718
 719         for (auto& entry : view_docks_)
 720                 if (entry.first == dock)
 721                         view = entry.second;
 722
 723         // Deregister the view
 724         for (shared_ptr<Session> session : sessions_) {
 725                 if (!session->has_view(view))
 726                         continue;
 727
 728                 // Also destroy the entire session if its main view is closing...
 729                 if (view == session->main_view()) {
 730                         // ...but only if data is saved or the user confirms closing
 731                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 732                                 tr("This session contains unsaved data. Close it anyway?"),
 733                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 734                                 remove_session(session);
 735                         break;
 736                 } else
 737                         // All other views can be closed at any time as no data will be lost
 738                         remove_view(view);
 739         }
 740 }
 741
 742 void MainWindow::on_tab_changed(int index)
 743 {
 744         shared_ptr<Session> session = get_tab_session(index);
 745
 746         if (session)
 747                 on_focused_session_changed(session);
 748 }
 749
 750 void MainWindow::on_tab_close_requested(int index)
 751 {
 752         shared_ptr<Session> session = get_tab_session(index);
 753
 754         if (!session)
 755                 return;
 756
 757         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 758                 tr("This session contains unsaved data. Close it anyway?"),
 759                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 760                 remove_session(session);
 761 }
 762
 763 void MainWindow::on_view_colored_bg_shortcut()
 764 {
 765         GlobalSettings settings;
 766
 767         bool state = settings.value(GlobalSettings::Key_View_ColoredBG).toBool();
 768         settings.setValue(GlobalSettings::Key_View_ColoredBG, !state);
 769 }
 770
 771 void MainWindow::on_view_sticky_scrolling_shortcut()
 772 {
 773         GlobalSettings settings;
 774
 775         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 776         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 777 }
 778
 779 void MainWindow::on_view_show_sampling_points_shortcut()
 780 {
 781         GlobalSettings settings;
 782
 783         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 784         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 785 }
 786
 787 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 788 {
 789         GlobalSettings settings;
 790
 791         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 792         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 793 }
 794
 795 void MainWindow::on_settingViewColoredBg_changed(const QVariant new_value)
 796 {
 797         bool state = new_value.toBool();
 798
 799         for (auto& entry : view_docks_) {
 800                 shared_ptr<views::ViewBase> viewbase = entry.second;
 801
 802                 // Only trace views have this setting
 803                 views::trace::View* view =
 804                                 qobject_cast<views::trace::View*>(viewbase.get());
 805                 if (view)
 806                         view->enable_colored_bg(state);
 807         }
 808 }
 809
 810 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
 811 {
 812         bool state = new_value.toBool();
 813
 814         for (auto& entry : view_docks_) {
 815                 shared_ptr<views::ViewBase> viewbase = entry.second;
 816
 817                 // Only trace views have this setting
 818                 views::trace::View* view =
 819                                 qobject_cast<views::trace::View*>(viewbase.get());
 820                 if (view)
 821                         view->enable_show_sampling_points(state);
 822         }
 823 }
 824
 825 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
 826 {
 827         bool state = new_value.toBool();
 828
 829         for (auto& entry : view_docks_) {
 830                 shared_ptr<views::ViewBase> viewbase = entry.second;
 831
 832                 // Only trace views have this setting
 833                 views::trace::View* view =
 834                                 qobject_cast<views::trace::View*>(viewbase.get());
 835                 if (view)
 836                         view->enable_show_analog_minor_grid(state);
 837         }
 838 }
 839
 840 void MainWindow::on_close_current_tab()
 841 {
 842         int tab = session_selector_.currentIndex();
 843
 844         on_tab_close_requested(tab);
 845 }
 846
 847 } // namespace pv