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::dynamic_pointer_cast;
  54 using std::make_shared;
  55 using std::shared_ptr;
  56 using std::string;
  57
  58 namespace pv {
  59
  60 namespace view {
  61 class ViewItem;
  62 }
  63
  64 using toolbars::MainBar;
  65
  66 const QString MainWindow::WindowTitle = tr("PulseView");
  67
  68 MainWindow::MainWindow(DeviceManager &device_manager, QWidget *parent) :
  69         QMainWindow(parent),
  70         device_manager_(device_manager),
  71         session_selector_(this),
  72         session_state_mapper_(this),
  73         icon_red_(":/icons/status-red.svg"),
  74         icon_green_(":/icons/status-green.svg"),
  75         icon_grey_(":/icons/status-grey.svg")
  76 {
  77         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  78         qRegisterMetaType<uint64_t>("uint64_t");
  79
  80         GlobalSettings::add_change_handler(this);
  81
  82         GlobalSettings settings;
  83         settings.set_defaults_where_needed();
  84
  85         setup_ui();
  86         restore_ui_settings();
  87 }
  88
  89 MainWindow::~MainWindow()
  90 {
  91         GlobalSettings::remove_change_handler(this);
  92
  93         while (!sessions_.empty())
  94                 remove_session(sessions_.front());
  95 }
  96
  97 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
  98 {
  99         // If there's only one view, use it...
 100         if (view_docks_.size() == 1)
 101                 return view_docks_.begin()->second;
 102
 103         // ...otherwise find the dock widget the widget with focus is contained in
 104         QObject *w = QApplication::focusWidget();
 105         QDockWidget *dock = nullptr;
 106
 107         while (w) {
 108                 dock = qobject_cast<QDockWidget*>(w);
 109                 if (dock)
 110                         break;
 111                 w = w->parent();
 112         }
 113
 114         // Get the view contained in the dock widget
 115         for (auto entry : view_docks_)
 116                 if (entry.first == dock)
 117                         return entry.second;
 118
 119         return nullptr;
 120 }
 121
 122 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 123         views::ViewType type, Session &session)
 124 {
 125         GlobalSettings settings;
 126         shared_ptr<views::ViewBase> v;
 127
 128         QMainWindow *main_window = nullptr;
 129         for (auto entry : session_windows_)
 130                 if (entry.first.get() == &session)
 131                         main_window = entry.second;
 132
 133         assert(main_window);
 134
 135         shared_ptr<MainBar> main_bar = session.main_bar();
 136
 137         QDockWidget* dock = new QDockWidget(title, main_window);
 138         dock->setObjectName(title);
 139         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 140
 141         // Insert a QMainWindow into the dock widget to allow for a tool bar
 142         QMainWindow *dock_main = new QMainWindow(dock);
 143         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 144
 145         if (type == views::ViewTypeTrace)
 146                 // This view will be the main view if there's no main bar yet
 147                 v = make_shared<views::trace::View>(session,
 148                         (main_bar ? false : true), dock_main);
 149
 150         if (!v)
 151                 return nullptr;
 152
 153         view_docks_[dock] = v;
 154         session.register_view(v);
 155
 156         dock_main->setCentralWidget(v.get());
 157         dock->setWidget(dock_main);
 158
 159         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 160         dock->setFeatures(QDockWidget::DockWidgetMovable |
 161                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 162
 163         QAbstractButton *close_btn =
 164                 dock->findChildren<QAbstractButton*>
 165                         ("qt_dockwidget_closebutton").front();
 166
 167         connect(close_btn, SIGNAL(clicked(bool)),
 168                 this, SLOT(on_view_close_clicked()));
 169
 170         connect(&session, SIGNAL(trigger_event(int, util::Timestamp)),
 171                 qobject_cast<views::ViewBase*>(v.get()),
 172                 SLOT(trigger_event(int, util::Timestamp)));
 173
 174         if (type == views::ViewTypeTrace) {
 175                 views::trace::View *tv =
 176                         qobject_cast<views::trace::View*>(v.get());
 177
 178                 tv->enable_coloured_bg(settings.value(GlobalSettings::Key_View_ColouredBG).toBool());
 179                 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
 180                 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
 181
 182                 if (!main_bar) {
 183                         /* Initial view, create the main bar */
 184                         main_bar = make_shared<MainBar>(session, this, tv);
 185                         dock_main->addToolBar(main_bar.get());
 186                         session.set_main_bar(main_bar);
 187
 188                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 189                                 this, SLOT(on_new_view(Session*)));
 190
 191                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 192
 193                         /* For the main view we need to prevent the dock widget from
 194                          * closing itself when its close button is clicked. This is
 195                          * so we can confirm with the user first. Regular views don't
 196                          * need this */
 197                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 198                 } else {
 199                         /* Additional view, create a standard bar */
 200                         pv::views::trace::StandardBar *standard_bar =
 201                                 new pv::views::trace::StandardBar(session, this, tv);
 202                         dock_main->addToolBar(standard_bar);
 203
 204                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 205                 }
 206         }
 207
 208         return v;
 209 }
 210
 211 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 212 {
 213         for (shared_ptr<Session> session : sessions_) {
 214                 if (!session->has_view(view))
 215                         continue;
 216
 217                 // Find the dock the view is contained in and remove it
 218                 for (auto entry : view_docks_)
 219                         if (entry.second == view) {
 220                                 // Remove the view from the session
 221                                 session->deregister_view(view);
 222
 223                                 // Remove the view from its parent; otherwise, Qt will
 224                                 // call deleteLater() on it, which causes a double free
 225                                 // since the shared_ptr in view_docks_ doesn't know
 226                                 // that Qt keeps a pointer to the view around
 227                                 view->setParent(nullptr);
 228
 229                                 // Delete the view's dock widget and all widgets inside it
 230                                 entry.first->deleteLater();
 231
 232                                 // Remove the dock widget from the list and stop iterating
 233                                 view_docks_.erase(entry.first);
 234                                 break;
 235                         }
 236         }
 237 }
 238
 239 shared_ptr<Session> MainWindow::add_session()
 240 {
 241         static int last_session_id = 1;
 242         QString name = tr("Session %1").arg(last_session_id++);
 243
 244         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 245
 246         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 247                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 248         connect(session.get(), SIGNAL(name_changed()),
 249                 this, SLOT(on_session_name_changed()));
 250         session_state_mapper_.setMapping(session.get(), session.get());
 251         connect(session.get(), SIGNAL(capture_state_changed(int)),
 252                 &session_state_mapper_, SLOT(map()));
 253
 254         sessions_.push_back(session);
 255
 256         QMainWindow *window = new QMainWindow();
 257         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 258         session_windows_[session] = window;
 259
 260         int index = session_selector_.addTab(window, name);
 261         session_selector_.setCurrentIndex(index);
 262         last_focused_session_ = session;
 263
 264         window->setDockNestingEnabled(true);
 265
 266         shared_ptr<views::ViewBase> main_view =
 267                 add_view(name, views::ViewTypeTrace, *session);
 268
 269         return session;
 270 }
 271
 272 void MainWindow::remove_session(shared_ptr<Session> session)
 273 {
 274         // Determine the height of the button before it collapses
 275         int h = new_session_button_->height();
 276
 277         // Stop capture while the session still exists so that the UI can be
 278         // updated in case we're currently running. If so, this will schedule a
 279         // call to our on_capture_state_changed() slot for the next run of the
 280         // event loop. We need to have this executed immediately or else it will
 281         // be dismissed since the session object will be deleted by the time we
 282         // leave this method and the event loop gets a chance to run again.
 283         session->stop_capture();
 284         QApplication::processEvents();
 285
 286         for (shared_ptr<views::ViewBase> view : session->views())
 287                 remove_view(view);
 288
 289         QMainWindow *window = session_windows_.at(session);
 290         session_selector_.removeTab(session_selector_.indexOf(window));
 291
 292         session_windows_.erase(session);
 293
 294         if (last_focused_session_ == session)
 295                 last_focused_session_.reset();
 296
 297         // Remove the session from our list of sessions (which also destroys it)
 298         sessions_.remove_if([&](shared_ptr<Session> s) {
 299                 return s == session; });
 300
 301         if (sessions_.empty()) {
 302                 // When there are no more tabs, the height of the QTabWidget
 303                 // drops to zero. We must prevent this to keep the static
 304                 // widgets visible
 305                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 306                         w->setMinimumHeight(h);
 307
 308                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 309                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 310                 session_selector_.setMinimumHeight(h + 2 * margin);
 311
 312                 // Update the window title if there is no view left to
 313                 // generate focus change events
 314                 setWindowTitle(WindowTitle);
 315         }
 316 }
 317
 318 void MainWindow::add_session_with_file(string open_file_name,
 319         string open_file_format)
 320 {
 321         shared_ptr<Session> session = add_session();
 322         session->load_init_file(open_file_name, open_file_format);
 323 }
 324
 325 void MainWindow::add_default_session()
 326 {
 327         // Only add the default session if there would be no session otherwise
 328         if (sessions_.size() > 0)
 329                 return;
 330
 331         shared_ptr<Session> session = add_session();
 332
 333         // Check the list of available devices. Prefer the one that was
 334         // found with user supplied scan specs (if applicable). Then try
 335         // one of the auto detected devices that are not the demo device.
 336         // Pick demo in the absence of "genuine" hardware devices.
 337         shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
 338         for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
 339                 if (dev == device_manager_.user_spec_device()) {
 340                         user_device = dev;
 341                 } else if (dev->hardware_device()->driver()->name() == "demo") {
 342                         demo_device = dev;
 343                 } else {
 344                         other_device = dev;
 345                 }
 346         }
 347         if (user_device)
 348                 session->select_device(user_device);
 349         else if (other_device)
 350                 session->select_device(other_device);
 351         else
 352                 session->select_device(demo_device);
 353 }
 354
 355 void MainWindow::save_sessions()
 356 {
 357         QSettings settings;
 358         int id = 0;
 359
 360         for (shared_ptr<Session> session : sessions_) {
 361                 // Ignore sessions using the demo device or no device at all
 362                 if (session->device()) {
 363                         shared_ptr<devices::HardwareDevice> device =
 364                                 dynamic_pointer_cast< devices::HardwareDevice >
 365                                 (session->device());
 366
 367                         if (device &&
 368                                 device->hardware_device()->driver()->name() == "demo")
 369                                 continue;
 370
 371                         settings.beginGroup("Session" + QString::number(id++));
 372                         settings.remove("");  // Remove all keys in this group
 373                         session->save_settings(settings);
 374                         settings.endGroup();
 375                 }
 376         }
 377
 378         settings.setValue("sessions", id);
 379 }
 380
 381 void MainWindow::restore_sessions()
 382 {
 383         QSettings settings;
 384         int i, session_count;
 385
 386         session_count = settings.value("sessions", 0).toInt();
 387
 388         for (i = 0; i < session_count; i++) {
 389                 settings.beginGroup("Session" + QString::number(i));
 390                 shared_ptr<Session> session = add_session();
 391                 session->restore_settings(settings);
 392                 settings.endGroup();
 393         }
 394 }
 395
 396 void MainWindow::on_setting_changed(const QString &key, const QVariant &value)
 397 {
 398         if (key == GlobalSettings::Key_View_ColouredBG)
 399                 on_settingViewColouredBg_changed(value);
 400
 401         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
 402                 on_settingViewShowSamplingPoints_changed(value);
 403
 404         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
 405                 on_settingViewShowAnalogMinorGrid_changed(value);
 406 }
 407
 408 void MainWindow::setup_ui()
 409 {
 410         setObjectName(QString::fromUtf8("MainWindow"));
 411
 412         setCentralWidget(&session_selector_);
 413
 414         // Set the window icon
 415         QIcon icon;
 416         icon.addFile(QString(":/icons/pulseview.png"));
 417         setWindowIcon(icon);
 418
 419         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 420         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 421
 422         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 423         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 424
 425         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 426         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 427
 428         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 429         view_coloured_bg_shortcut_->setAutoRepeat(false);
 430
 431         // Set up the tab area
 432         new_session_button_ = new QToolButton();
 433         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 434                 QIcon(":/icons/document-new.png")));
 435         new_session_button_->setToolTip(tr("Create New Session"));
 436         new_session_button_->setAutoRaise(true);
 437
 438         run_stop_button_ = new QToolButton();
 439         run_stop_button_->setAutoRaise(true);
 440         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 441         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 442
 443         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 444         run_stop_shortcut_->setAutoRepeat(false);
 445
 446         settings_button_ = new QToolButton();
 447         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 448                 QIcon(":/icons/preferences-system.png")));
 449         settings_button_->setToolTip(tr("Settings"));
 450         settings_button_->setAutoRaise(true);
 451
 452         QFrame *separator1 = new QFrame();
 453         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 454         QFrame *separator2 = new QFrame();
 455         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 456
 457         QHBoxLayout* layout = new QHBoxLayout();
 458         layout->setContentsMargins(2, 2, 2, 2);
 459         layout->addWidget(new_session_button_);
 460         layout->addWidget(separator1);
 461         layout->addWidget(run_stop_button_);
 462         layout->addWidget(separator2);
 463         layout->addWidget(settings_button_);
 464
 465         static_tab_widget_ = new QWidget();
 466         static_tab_widget_->setLayout(layout);
 467
 468         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 469         session_selector_.setTabsClosable(true);
 470
 471         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 472         close_application_shortcut_->setAutoRepeat(false);
 473
 474         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 475
 476         connect(new_session_button_, SIGNAL(clicked(bool)),
 477                 this, SLOT(on_new_session_clicked()));
 478         connect(run_stop_button_, SIGNAL(clicked(bool)),
 479                 this, SLOT(on_run_stop_clicked()));
 480         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 481                 this, SLOT(on_capture_state_changed(QObject*)));
 482         connect(settings_button_, SIGNAL(clicked(bool)),
 483                 this, SLOT(on_settings_clicked()));
 484
 485         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 486                 this, SLOT(on_tab_close_requested(int)));
 487         connect(&session_selector_, SIGNAL(currentChanged(int)),
 488                 this, SLOT(on_tab_changed(int)));
 489
 490
 491         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 492                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 493                 this, SLOT(on_focus_changed()));
 494 }
 495
 496 void MainWindow::save_ui_settings()
 497 {
 498         QSettings settings;
 499
 500         settings.beginGroup("MainWindow");
 501         settings.setValue("state", saveState());
 502         settings.setValue("geometry", saveGeometry());
 503         settings.endGroup();
 504 }
 505
 506 void MainWindow::restore_ui_settings()
 507 {
 508         QSettings settings;
 509
 510         settings.beginGroup("MainWindow");
 511
 512         if (settings.contains("geometry")) {
 513                 restoreGeometry(settings.value("geometry").toByteArray());
 514                 restoreState(settings.value("state").toByteArray());
 515         } else
 516                 resize(1000, 720);
 517
 518         settings.endGroup();
 519 }
 520
 521 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 522 {
 523         // Find the session that belongs to the tab's main window
 524         for (auto entry : session_windows_)
 525                 if (entry.second == session_selector_.widget(index))
 526                         return entry.first;
 527
 528         return nullptr;
 529 }
 530
 531 void MainWindow::closeEvent(QCloseEvent *event)
 532 {
 533         bool data_saved = true;
 534
 535         for (auto entry : session_windows_)
 536                 if (!entry.first->data_saved())
 537                         data_saved = false;
 538
 539         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 540                 tr("There is unsaved data. Close anyway?"),
 541                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 542                 event->ignore();
 543         } else {
 544                 save_ui_settings();
 545                 save_sessions();
 546                 event->accept();
 547         }
 548 }
 549
 550 QMenu* MainWindow::createPopupMenu()
 551 {
 552         return nullptr;
 553 }
 554
 555 bool MainWindow::restoreState(const QByteArray &state, int version)
 556 {
 557         (void)state;
 558         (void)version;
 559
 560         // Do nothing. We don't want Qt to handle this, or else it
 561         // will try to restore all the dock widgets and create havoc.
 562
 563         return false;
 564 }
 565
 566 void MainWindow::session_error(const QString text, const QString info_text)
 567 {
 568         QMetaObject::invokeMethod(this, "show_session_error",
 569                 Qt::QueuedConnection, Q_ARG(QString, text),
 570                 Q_ARG(QString, info_text));
 571 }
 572
 573 void MainWindow::show_session_error(const QString text, const QString info_text)
 574 {
 575         QMessageBox msg(this);
 576         msg.setText(text);
 577         msg.setInformativeText(info_text);
 578         msg.setStandardButtons(QMessageBox::Ok);
 579         msg.setIcon(QMessageBox::Warning);
 580         msg.exec();
 581 }
 582
 583 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 584         Session *session)
 585 {
 586         // We get a pointer and need a reference
 587         for (shared_ptr<Session> s : sessions_)
 588                 if (s.get() == session)
 589                         add_view(title, type, *s);
 590 }
 591
 592 void MainWindow::on_focus_changed()
 593 {
 594         shared_ptr<views::ViewBase> view = get_active_view();
 595
 596         if (view) {
 597                 for (shared_ptr<Session> session : sessions_) {
 598                         if (session->has_view(view)) {
 599                                 if (session != last_focused_session_) {
 600                                         // Activate correct tab if necessary
 601                                         shared_ptr<Session> tab_session = get_tab_session(
 602                                                 session_selector_.currentIndex());
 603                                         if (tab_session != session)
 604                                                 session_selector_.setCurrentWidget(
 605                                                         session_windows_.at(session));
 606
 607                                         on_focused_session_changed(session);
 608                                 }
 609
 610                                 break;
 611                         }
 612                 }
 613         }
 614
 615         if (sessions_.empty())
 616                 setWindowTitle(WindowTitle);
 617 }
 618
 619 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 620 {
 621         last_focused_session_ = session;
 622
 623         setWindowTitle(session->name() + " - " + WindowTitle);
 624
 625         // Update the state of the run/stop button, too
 626         on_capture_state_changed(session.get());
 627 }
 628
 629 void MainWindow::on_new_session_clicked()
 630 {
 631         add_session();
 632 }
 633
 634 void MainWindow::on_run_stop_clicked()
 635 {
 636         shared_ptr<Session> session = last_focused_session_;
 637
 638         if (!session)
 639                 return;
 640
 641         switch (session->get_capture_state()) {
 642         case Session::Stopped:
 643                 session->start_capture([&](QString message) {
 644                         session_error("Capture failed", message); });
 645                 break;
 646         case Session::AwaitingTrigger:
 647         case Session::Running:
 648                 session->stop_capture();
 649                 break;
 650         }
 651 }
 652
 653 void MainWindow::on_settings_clicked()
 654 {
 655         dialogs::Settings dlg(device_manager_);
 656         dlg.exec();
 657 }
 658
 659 void MainWindow::on_session_name_changed()
 660 {
 661         // Update the corresponding dock widget's name(s)
 662         Session *session = qobject_cast<Session*>(QObject::sender());
 663         assert(session);
 664
 665         for (shared_ptr<views::ViewBase> view : session->views()) {
 666                 // Get the dock that contains the view
 667                 for (auto entry : view_docks_)
 668                         if (entry.second == view) {
 669                                 entry.first->setObjectName(session->name());
 670                                 entry.first->setWindowTitle(session->name());
 671                         }
 672         }
 673
 674         // Update the tab widget by finding the main window and the tab from that
 675         for (auto entry : session_windows_)
 676                 if (entry.first.get() == session) {
 677                         QMainWindow *window = entry.second;
 678                         const int index = session_selector_.indexOf(window);
 679                         session_selector_.setTabText(index, session->name());
 680                 }
 681
 682         // Refresh window title if the affected session has focus
 683         if (session == last_focused_session_.get())
 684                 setWindowTitle(session->name() + " - " + WindowTitle);
 685 }
 686
 687 void MainWindow::on_capture_state_changed(QObject *obj)
 688 {
 689         Session *caller = qobject_cast<Session*>(obj);
 690
 691         // Ignore if caller is not the currently focused session
 692         // unless there is only one session
 693         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 694                 return;
 695
 696         int state = caller->get_capture_state();
 697
 698         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 699         run_stop_button_->setIcon(*icons[state]);
 700         run_stop_button_->setText((state == pv::Session::Stopped) ?
 701                 tr("Run") : tr("Stop"));
 702 }
 703
 704 void MainWindow::on_new_view(Session *session)
 705 {
 706         // We get a pointer and need a reference
 707         for (shared_ptr<Session> s : sessions_)
 708                 if (s.get() == session)
 709                         add_view(session->name(), views::ViewTypeTrace, *s);
 710 }
 711
 712 void MainWindow::on_view_close_clicked()
 713 {
 714         // Find the dock widget that contains the close button that was clicked
 715         QObject *w = QObject::sender();
 716         QDockWidget *dock = nullptr;
 717
 718         while (w) {
 719             dock = qobject_cast<QDockWidget*>(w);
 720             if (dock)
 721                 break;
 722             w = w->parent();
 723         }
 724
 725         // Get the view contained in the dock widget
 726         shared_ptr<views::ViewBase> view;
 727
 728         for (auto entry : view_docks_)
 729                 if (entry.first == dock)
 730                         view = entry.second;
 731
 732         // Deregister the view
 733         for (shared_ptr<Session> session : sessions_) {
 734                 if (!session->has_view(view))
 735                         continue;
 736
 737                 // Also destroy the entire session if its main view is closing...
 738                 if (view == session->main_view()) {
 739                         // ...but only if data is saved or the user confirms closing
 740                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 741                                 tr("This session contains unsaved data. Close it anyway?"),
 742                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 743                                 remove_session(session);
 744                         break;
 745                 } else
 746                         // All other views can be closed at any time as no data will be lost
 747                         remove_view(view);
 748         }
 749 }
 750
 751 void MainWindow::on_tab_changed(int index)
 752 {
 753         shared_ptr<Session> session = get_tab_session(index);
 754
 755         if (session)
 756                 on_focused_session_changed(session);
 757 }
 758
 759 void MainWindow::on_tab_close_requested(int index)
 760 {
 761         shared_ptr<Session> session = get_tab_session(index);
 762
 763         if (!session)
 764                 return;
 765
 766         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 767                 tr("This session contains unsaved data. Close it anyway?"),
 768                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 769                 remove_session(session);
 770 }
 771
 772 void MainWindow::on_view_coloured_bg_shortcut()
 773 {
 774         GlobalSettings settings;
 775
 776         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
 777         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
 778 }
 779
 780 void MainWindow::on_view_sticky_scrolling_shortcut()
 781 {
 782         GlobalSettings settings;
 783
 784         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 785         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 786 }
 787
 788 void MainWindow::on_view_show_sampling_points_shortcut()
 789 {
 790         GlobalSettings settings;
 791
 792         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 793         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 794 }
 795
 796 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 797 {
 798         GlobalSettings settings;
 799
 800         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 801         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 802 }
 803
 804 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
 805 {
 806         bool state = new_value.toBool();
 807
 808         for (auto entry : view_docks_) {
 809                 shared_ptr<views::ViewBase> viewbase = entry.second;
 810
 811                 // Only trace views have this setting
 812                 views::trace::View* view =
 813                                 qobject_cast<views::trace::View*>(viewbase.get());
 814                 if (view)
 815                         view->enable_coloured_bg(state);
 816         }
 817 }
 818
 819 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
 820 {
 821         bool state = new_value.toBool();
 822
 823         for (auto entry : view_docks_) {
 824                 shared_ptr<views::ViewBase> viewbase = entry.second;
 825
 826                 // Only trace views have this setting
 827                 views::trace::View* view =
 828                                 qobject_cast<views::trace::View*>(viewbase.get());
 829                 if (view)
 830                         view->enable_show_sampling_points(state);
 831         }
 832 }
 833
 834 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
 835 {
 836         bool state = new_value.toBool();
 837
 838         for (auto entry : view_docks_) {
 839                 shared_ptr<views::ViewBase> viewbase = entry.second;
 840
 841                 // Only trace views have this setting
 842                 views::trace::View* view =
 843                                 qobject_cast<views::trace::View*>(viewbase.get());
 844                 if (view)
 845                         view->enable_show_analog_minor_grid(state);
 846         }
 847 }
 848
 849 void MainWindow::on_close_current_tab()
 850 {
 851         int tab = session_selector_.currentIndex();
 852
 853         on_tab_close_requested(tab);
 854 }
 855
 856 } // namespace pv