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 "views/trace/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         GlobalSettings settings;
  93         settings.set_defaults_where_needed();
  94
  95         setup_ui();
  96         restore_ui_settings();
  97 }
  98
  99 MainWindow::~MainWindow()
 100 {
 101         while (!sessions_.empty())
 102                 remove_session(sessions_.front());
 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*>
 173                         ("qt_dockwidget_closebutton").front();
 174
 175         connect(close_btn, SIGNAL(clicked(bool)),
 176                 this, SLOT(on_view_close_clicked()));
 177
 178         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 179                 qobject_cast<views::ViewBase*>(v.get()),
 180                 SLOT(trigger_event(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_coloured_bg(settings.value(GlobalSettings::Key_View_ColouredBG).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 (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*>())
 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 (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::setup_ui()
 405 {
 406         setObjectName(QString::fromUtf8("MainWindow"));
 407
 408         setCentralWidget(&session_selector_);
 409
 410         // Set the window icon
 411         QIcon icon;
 412         icon.addFile(QString(":/icons/pulseview.png"));
 413         setWindowIcon(icon);
 414
 415         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 416         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 417
 418         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 419         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 420
 421         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 422         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 423
 424         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 425         view_coloured_bg_shortcut_->setAutoRepeat(false);
 426
 427         // Set up the tab area
 428         new_session_button_ = new QToolButton();
 429         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 430                 QIcon(":/icons/document-new.png")));
 431         new_session_button_->setToolTip(tr("Create New Session"));
 432         new_session_button_->setAutoRaise(true);
 433
 434         run_stop_button_ = new QToolButton();
 435         run_stop_button_->setAutoRaise(true);
 436         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 437         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 438
 439         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 440         run_stop_shortcut_->setAutoRepeat(false);
 441
 442         settings_button_ = new QToolButton();
 443         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 444                 QIcon(":/icons/preferences-system.png")));
 445         settings_button_->setToolTip(tr("Settings"));
 446         settings_button_->setAutoRaise(true);
 447
 448         QFrame *separator1 = new QFrame();
 449         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 450         QFrame *separator2 = new QFrame();
 451         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 452
 453         QHBoxLayout* layout = new QHBoxLayout();
 454         layout->setContentsMargins(2, 2, 2, 2);
 455         layout->addWidget(new_session_button_);
 456         layout->addWidget(separator1);
 457         layout->addWidget(run_stop_button_);
 458         layout->addWidget(separator2);
 459         layout->addWidget(settings_button_);
 460
 461         static_tab_widget_ = new QWidget();
 462         static_tab_widget_->setLayout(layout);
 463
 464         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 465         session_selector_.setTabsClosable(true);
 466
 467         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 468         close_application_shortcut_->setAutoRepeat(false);
 469
 470         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 471
 472         connect(new_session_button_, SIGNAL(clicked(bool)),
 473                 this, SLOT(on_new_session_clicked()));
 474         connect(run_stop_button_, SIGNAL(clicked(bool)),
 475                 this, SLOT(on_run_stop_clicked()));
 476         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 477                 this, SLOT(on_capture_state_changed(QObject*)));
 478         connect(settings_button_, SIGNAL(clicked(bool)),
 479                 this, SLOT(on_settings_clicked()));
 480
 481         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 482                 this, SLOT(on_tab_close_requested(int)));
 483         connect(&session_selector_, SIGNAL(currentChanged(int)),
 484                 this, SLOT(on_tab_changed(int)));
 485
 486
 487         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 488                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 489                 this, SLOT(on_focus_changed()));
 490 }
 491
 492 void MainWindow::save_ui_settings()
 493 {
 494         QSettings settings;
 495
 496         settings.beginGroup("MainWindow");
 497         settings.setValue("state", saveState());
 498         settings.setValue("geometry", saveGeometry());
 499         settings.endGroup();
 500 }
 501
 502 void MainWindow::restore_ui_settings()
 503 {
 504         QSettings settings;
 505
 506         settings.beginGroup("MainWindow");
 507
 508         if (settings.contains("geometry")) {
 509                 restoreGeometry(settings.value("geometry").toByteArray());
 510                 restoreState(settings.value("state").toByteArray());
 511         } else
 512                 resize(1000, 720);
 513
 514         settings.endGroup();
 515 }
 516
 517 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 518 {
 519         // Find the session that belongs to the tab's main window
 520         for (auto entry : session_windows_)
 521                 if (entry.second == session_selector_.widget(index))
 522                         return entry.first;
 523
 524         return nullptr;
 525 }
 526
 527 void MainWindow::closeEvent(QCloseEvent *event)
 528 {
 529         bool data_saved = true;
 530
 531         for (auto entry : session_windows_)
 532                 if (!entry.first->data_saved())
 533                         data_saved = false;
 534
 535         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 536                 tr("There is unsaved data. Close anyway?"),
 537                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 538                 event->ignore();
 539         } else {
 540                 save_ui_settings();
 541                 save_sessions();
 542                 event->accept();
 543         }
 544 }
 545
 546 QMenu* MainWindow::createPopupMenu()
 547 {
 548         return nullptr;
 549 }
 550
 551 bool MainWindow::restoreState(const QByteArray &state, int version)
 552 {
 553         (void)state;
 554         (void)version;
 555
 556         // Do nothing. We don't want Qt to handle this, or else it
 557         // will try to restore all the dock widgets and create havoc.
 558
 559         return false;
 560 }
 561
 562 void MainWindow::session_error(const QString text, const QString info_text)
 563 {
 564         QMetaObject::invokeMethod(this, "show_session_error",
 565                 Qt::QueuedConnection, Q_ARG(QString, text),
 566                 Q_ARG(QString, info_text));
 567 }
 568
 569 void MainWindow::show_session_error(const QString text, const QString info_text)
 570 {
 571         QMessageBox msg(this);
 572         msg.setText(text);
 573         msg.setInformativeText(info_text);
 574         msg.setStandardButtons(QMessageBox::Ok);
 575         msg.setIcon(QMessageBox::Warning);
 576         msg.exec();
 577 }
 578
 579 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 580         Session *session)
 581 {
 582         // We get a pointer and need a reference
 583         for (shared_ptr<Session> s : sessions_)
 584                 if (s.get() == session)
 585                         add_view(title, type, *s);
 586 }
 587
 588 void MainWindow::on_focus_changed()
 589 {
 590         shared_ptr<views::ViewBase> view = get_active_view();
 591
 592         if (view) {
 593                 for (shared_ptr<Session> session : sessions_) {
 594                         if (session->has_view(view)) {
 595                                 if (session != last_focused_session_) {
 596                                         // Activate correct tab if necessary
 597                                         shared_ptr<Session> tab_session = get_tab_session(
 598                                                 session_selector_.currentIndex());
 599                                         if (tab_session != session)
 600                                                 session_selector_.setCurrentWidget(
 601                                                         session_windows_.at(session));
 602
 603                                         on_focused_session_changed(session);
 604                                 }
 605
 606                                 break;
 607                         }
 608                 }
 609         }
 610
 611         if (sessions_.empty())
 612                 setWindowTitle(WindowTitle);
 613 }
 614
 615 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 616 {
 617         last_focused_session_ = session;
 618
 619         setWindowTitle(session->name() + " - " + WindowTitle);
 620
 621         // Update the state of the run/stop button, too
 622         on_capture_state_changed(session.get());
 623 }
 624
 625 void MainWindow::on_new_session_clicked()
 626 {
 627         add_session();
 628 }
 629
 630 void MainWindow::on_run_stop_clicked()
 631 {
 632         shared_ptr<Session> session = last_focused_session_;
 633
 634         if (!session)
 635                 return;
 636
 637         switch (session->get_capture_state()) {
 638         case Session::Stopped:
 639                 session->start_capture([&](QString message) {
 640                         session_error("Capture failed", message); });
 641                 break;
 642         case Session::AwaitingTrigger:
 643         case Session::Running:
 644                 session->stop_capture();
 645                 break;
 646         }
 647 }
 648
 649 void MainWindow::on_settings_clicked()
 650 {
 651         dialogs::Settings dlg(device_manager_);
 652         dlg.exec();
 653 }
 654
 655 void MainWindow::on_session_name_changed()
 656 {
 657         // Update the corresponding dock widget's name(s)
 658         Session *session = qobject_cast<Session*>(QObject::sender());
 659         assert(session);
 660
 661         for (shared_ptr<views::ViewBase> view : session->views()) {
 662                 // Get the dock that contains the view
 663                 for (auto entry : view_docks_)
 664                         if (entry.second == view) {
 665                                 entry.first->setObjectName(session->name());
 666                                 entry.first->setWindowTitle(session->name());
 667                         }
 668         }
 669
 670         // Update the tab widget by finding the main window and the tab from that
 671         for (auto entry : session_windows_)
 672                 if (entry.first.get() == session) {
 673                         QMainWindow *window = entry.second;
 674                         const int index = session_selector_.indexOf(window);
 675                         session_selector_.setTabText(index, session->name());
 676                 }
 677
 678         // Refresh window title if the affected session has focus
 679         if (session == last_focused_session_.get())
 680                 setWindowTitle(session->name() + " - " + WindowTitle);
 681 }
 682
 683 void MainWindow::on_capture_state_changed(QObject *obj)
 684 {
 685         Session *caller = qobject_cast<Session*>(obj);
 686
 687         // Ignore if caller is not the currently focused session
 688         // unless there is only one session
 689         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 690                 return;
 691
 692         int state = caller->get_capture_state();
 693
 694         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 695         run_stop_button_->setIcon(*icons[state]);
 696         run_stop_button_->setText((state == pv::Session::Stopped) ?
 697                 tr("Run") : tr("Stop"));
 698 }
 699
 700 void MainWindow::on_new_view(Session *session)
 701 {
 702         // We get a pointer and need a reference
 703         for (shared_ptr<Session> s : sessions_)
 704                 if (s.get() == session)
 705                         add_view(session->name(), views::ViewTypeTrace, *s);
 706 }
 707
 708 void MainWindow::on_view_close_clicked()
 709 {
 710         // Find the dock widget that contains the close button that was clicked
 711         QObject *w = QObject::sender();
 712         QDockWidget *dock = nullptr;
 713
 714         while (w) {
 715             dock = qobject_cast<QDockWidget*>(w);
 716             if (dock)
 717                 break;
 718             w = w->parent();
 719         }
 720
 721         // Get the view contained in the dock widget
 722         shared_ptr<views::ViewBase> view;
 723
 724         for (auto entry : view_docks_)
 725                 if (entry.first == dock)
 726                         view = entry.second;
 727
 728         // Deregister the view
 729         for (shared_ptr<Session> session : sessions_) {
 730                 if (!session->has_view(view))
 731                         continue;
 732
 733                 // Also destroy the entire session if its main view is closing...
 734                 if (view == session->main_view()) {
 735                         // ...but only if data is saved or the user confirms closing
 736                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 737                                 tr("This session contains unsaved data. Close it anyway?"),
 738                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 739                                 remove_session(session);
 740                         break;
 741                 } else
 742                         // All other views can be closed at any time as no data will be lost
 743                         remove_view(view);
 744         }
 745 }
 746
 747 void MainWindow::on_tab_changed(int index)
 748 {
 749         shared_ptr<Session> session = get_tab_session(index);
 750
 751         if (session)
 752                 on_focused_session_changed(session);
 753 }
 754
 755 void MainWindow::on_tab_close_requested(int index)
 756 {
 757         shared_ptr<Session> session = get_tab_session(index);
 758
 759         if (!session)
 760                 return;
 761
 762         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 763                 tr("This session contains unsaved data. Close it anyway?"),
 764                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 765                 remove_session(session);
 766 }
 767
 768 void MainWindow::on_view_coloured_bg_shortcut()
 769 {
 770         GlobalSettings settings;
 771
 772         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
 773         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
 774 }
 775
 776 void MainWindow::on_view_sticky_scrolling_shortcut()
 777 {
 778         GlobalSettings settings;
 779
 780         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 781         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 782 }
 783
 784 void MainWindow::on_view_show_sampling_points_shortcut()
 785 {
 786         GlobalSettings settings;
 787
 788         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 789         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 790 }
 791
 792 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 793 {
 794         GlobalSettings settings;
 795
 796         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 797         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 798 }
 799
 800 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
 801 {
 802         bool state = new_value.toBool();
 803
 804         for (auto entry : view_docks_) {
 805                 shared_ptr<views::ViewBase> viewbase = entry.second;
 806
 807                 // Only trace views have this setting
 808                 views::trace::View* view =
 809                                 qobject_cast<views::trace::View*>(viewbase.get());
 810                 if (view)
 811                         view->enable_coloured_bg(state);
 812         }
 813 }
 814
 815 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
 816 {
 817         bool state = new_value.toBool();
 818
 819         for (auto entry : view_docks_) {
 820                 shared_ptr<views::ViewBase> viewbase = entry.second;
 821
 822                 // Only trace views have this setting
 823                 views::trace::View* view =
 824                                 qobject_cast<views::trace::View*>(viewbase.get());
 825                 if (view)
 826                         view->enable_show_sampling_points(state);
 827         }
 828 }
 829
 830 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
 831 {
 832         bool state = new_value.toBool();
 833
 834         for (auto entry : view_docks_) {
 835                 shared_ptr<views::ViewBase> viewbase = entry.second;
 836
 837                 // Only trace views have this setting
 838                 views::trace::View* view =
 839                                 qobject_cast<views::trace::View*>(viewbase.get());
 840                 if (view)
 841                         view->enable_show_analog_minor_grid(state);
 842         }
 843 }
 844
 845 void MainWindow::on_close_current_tab()
 846 {
 847         int tab = session_selector_.currentIndex();
 848
 849         on_tab_close_requested(tab);
 850 }
 851
 852 } // namespace pv