pv/mainwindow.cpp

   1 /*
   2  * This file is part of the PulseView project.
   3  *
   4  * Copyright (C) 2012 Joel Holdsworth <joel@airwebreathe.org.uk>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, see <http://www.gnu.org/licenses/>.
  18  */
  19
  20 #ifdef ENABLE_DECODE
  21 #include <libsigrokdecode/libsigrokdecode.h>
  22 #endif
  23
  24 #include <algorithm>
  25 #include <cassert>
  26 #include <cstdarg>
  27 #include <cstdint>
  28 #include <iterator>
  29
  30 #include <QAction>
  31 #include <QApplication>
  32 #include <QCloseEvent>
  33 #include <QDockWidget>
  34 #include <QHBoxLayout>
  35 #include <QMessageBox>
  36 #include <QSettings>
  37 #include <QShortcut>
  38 #include <QWidget>
  39
  40 #include "mainwindow.hpp"
  41
  42 #include "devicemanager.hpp"
  43 #include "devices/hardwaredevice.hpp"
  44 #include "dialogs/settings.hpp"
  45 #include "globalsettings.hpp"
  46 #include "toolbars/mainbar.hpp"
  47 #include "util.hpp"
  48 #include "view/view.hpp"
  49 #include "views/trace/standardbar.hpp"
  50
  51 #include <libsigrokcxx/libsigrokcxx.hpp>
  52
  53 using std::bind;
  54 using std::dynamic_pointer_cast;
  55 using std::make_shared;
  56 using std::map;
  57 using std::placeholders::_1;
  58 using std::shared_ptr;
  59 using std::string;
  60
  61 namespace pv {
  62
  63 namespace view {
  64 class ViewItem;
  65 }
  66
  67 using toolbars::MainBar;
  68
  69 const QString MainWindow::WindowTitle = tr("PulseView");
  70
  71 MainWindow::MainWindow(DeviceManager &device_manager,
  72         string open_file_name, string open_file_format,
  73         bool restore_sessions, QWidget *parent) :
  74         QMainWindow(parent),
  75         device_manager_(device_manager),
  76         session_selector_(this),
  77         session_state_mapper_(this),
  78         icon_red_(":/icons/status-red.svg"),
  79         icon_green_(":/icons/status-green.svg"),
  80         icon_grey_(":/icons/status-grey.svg")
  81 {
  82         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  83         qRegisterMetaType<uint64_t>("uint64_t");
  84
  85         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ColouredBG,
  86                 bind(&MainWindow::on_settingViewColouredBg_changed, this, _1));
  87
  88         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ShowSamplingPoints,
  89                 bind(&MainWindow::on_settingViewShowSamplingPoints_changed, this, _1));
  90
  91         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ShowAnalogMinorGrid,
  92                 bind(&MainWindow::on_settingViewShowAnalogMinorGrid_changed, this, _1));
  93
  94         setup_ui();
  95         restore_ui_settings(restore_sessions);
  96
  97         if (!open_file_name.empty()) {
  98                 shared_ptr<Session> session = add_session();
  99                 session->load_init_file(open_file_name, open_file_format);
 100         }
 101
 102         // Add empty default session if there aren't any sessions
 103         if (sessions_.size() == 0) {
 104                 shared_ptr<Session> session = add_session();
 105
 106                 map<string, string> dev_info;
 107                 shared_ptr<devices::HardwareDevice> other_device, demo_device;
 108
 109                 // Use any available device that's not demo
 110                 for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
 111                         if (dev->hardware_device()->driver()->name() == "demo") {
 112                                 demo_device = dev;
 113                         } else {
 114                                 other_device = dev;
 115                         }
 116                 }
 117
 118                 // ...and if there isn't any, just use demo then
 119                 session->select_device(other_device ? other_device : demo_device);
 120         }
 121 }
 122
 123 MainWindow::~MainWindow()
 124 {
 125         while (!sessions_.empty())
 126                 remove_session(sessions_.front());
 127 }
 128
 129 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 130 {
 131         // If there's only one view, use it...
 132         if (view_docks_.size() == 1)
 133                 return view_docks_.begin()->second;
 134
 135         // ...otherwise find the dock widget the widget with focus is contained in
 136         QObject *w = QApplication::focusWidget();
 137         QDockWidget *dock = nullptr;
 138
 139         while (w) {
 140                 dock = qobject_cast<QDockWidget*>(w);
 141                 if (dock)
 142                         break;
 143                 w = w->parent();
 144         }
 145
 146         // Get the view contained in the dock widget
 147         for (auto entry : view_docks_)
 148                 if (entry.first == dock)
 149                         return entry.second;
 150
 151         return nullptr;
 152 }
 153
 154 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 155         views::ViewType type, Session &session)
 156 {
 157         GlobalSettings settings;
 158         shared_ptr<views::ViewBase> v;
 159
 160         QMainWindow *main_window = nullptr;
 161         for (auto entry : session_windows_)
 162                 if (entry.first.get() == &session)
 163                         main_window = entry.second;
 164
 165         assert(main_window);
 166
 167         shared_ptr<MainBar> main_bar = session.main_bar();
 168
 169         QDockWidget* dock = new QDockWidget(title, main_window);
 170         dock->setObjectName(title);
 171         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 172
 173         // Insert a QMainWindow into the dock widget to allow for a tool bar
 174         QMainWindow *dock_main = new QMainWindow(dock);
 175         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 176
 177         if (type == views::ViewTypeTrace)
 178                 // This view will be the main view if there's no main bar yet
 179                 v = make_shared<views::TraceView::View>(session,
 180                         (main_bar ? false : true), dock_main);
 181
 182         if (!v)
 183                 return nullptr;
 184
 185         view_docks_[dock] = v;
 186         session.register_view(v);
 187
 188         dock_main->setCentralWidget(v.get());
 189         dock->setWidget(dock_main);
 190
 191         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 192         dock->setFeatures(QDockWidget::DockWidgetMovable |
 193                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 194
 195         QAbstractButton *close_btn =
 196                 dock->findChildren<QAbstractButton*>
 197                         ("qt_dockwidget_closebutton").front();
 198
 199         connect(close_btn, SIGNAL(clicked(bool)),
 200                 this, SLOT(on_view_close_clicked()));
 201
 202         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 203                 qobject_cast<views::ViewBase*>(v.get()),
 204                 SLOT(trigger_event(util::Timestamp)));
 205
 206         if (type == views::ViewTypeTrace) {
 207                 views::TraceView::View *tv =
 208                         qobject_cast<views::TraceView::View*>(v.get());
 209
 210                 tv->enable_coloured_bg(settings.value(GlobalSettings::Key_View_ColouredBG).toBool());
 211                 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
 212                 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
 213
 214                 if (!main_bar) {
 215                         /* Initial view, create the main bar */
 216                         main_bar = make_shared<MainBar>(session, this, tv);
 217                         dock_main->addToolBar(main_bar.get());
 218                         session.set_main_bar(main_bar);
 219
 220                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 221                                 this, SLOT(on_new_view(Session*)));
 222
 223                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 224
 225                         /* For the main view we need to prevent the dock widget from
 226                          * closing itself when its close button is clicked. This is
 227                          * so we can confirm with the user first. Regular views don't
 228                          * need this */
 229                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 230                 } else {
 231                         /* Additional view, create a standard bar */
 232                         pv::views::trace::StandardBar *standard_bar =
 233                                 new pv::views::trace::StandardBar(session, this, tv);
 234                         dock_main->addToolBar(standard_bar);
 235
 236                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 237                 }
 238         }
 239
 240         return v;
 241 }
 242
 243 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 244 {
 245         for (shared_ptr<Session> session : sessions_) {
 246                 if (!session->has_view(view))
 247                         continue;
 248
 249                 // Find the dock the view is contained in and remove it
 250                 for (auto entry : view_docks_)
 251                         if (entry.second == view) {
 252                                 // Remove the view from the session
 253                                 session->deregister_view(view);
 254
 255                                 // Remove the view from its parent; otherwise, Qt will
 256                                 // call deleteLater() on it, which causes a double free
 257                                 // since the shared_ptr in view_docks_ doesn't know
 258                                 // that Qt keeps a pointer to the view around
 259                                 view->setParent(nullptr);
 260
 261                                 // Delete the view's dock widget and all widgets inside it
 262                                 entry.first->deleteLater();
 263
 264                                 // Remove the dock widget from the list and stop iterating
 265                                 view_docks_.erase(entry.first);
 266                                 break;
 267                         }
 268         }
 269 }
 270
 271 shared_ptr<Session> MainWindow::add_session()
 272 {
 273         static int last_session_id = 1;
 274         QString name = tr("Session %1").arg(last_session_id++);
 275
 276         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 277
 278         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 279                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 280         connect(session.get(), SIGNAL(name_changed()),
 281                 this, SLOT(on_session_name_changed()));
 282         session_state_mapper_.setMapping(session.get(), session.get());
 283         connect(session.get(), SIGNAL(capture_state_changed(int)),
 284                 &session_state_mapper_, SLOT(map()));
 285
 286         sessions_.push_back(session);
 287
 288         QMainWindow *window = new QMainWindow();
 289         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 290         session_windows_[session] = window;
 291
 292         int index = session_selector_.addTab(window, name);
 293         session_selector_.setCurrentIndex(index);
 294         last_focused_session_ = session;
 295
 296         window->setDockNestingEnabled(true);
 297
 298         shared_ptr<views::ViewBase> main_view =
 299                 add_view(name, views::ViewTypeTrace, *session);
 300
 301         return session;
 302 }
 303
 304 void MainWindow::remove_session(shared_ptr<Session> session)
 305 {
 306         // Determine the height of the button before it collapses
 307         int h = new_session_button_->height();
 308
 309         // Stop capture while the session still exists so that the UI can be
 310         // updated in case we're currently running. If so, this will schedule a
 311         // call to our on_capture_state_changed() slot for the next run of the
 312         // event loop. We need to have this executed immediately or else it will
 313         // be dismissed since the session object will be deleted by the time we
 314         // leave this method and the event loop gets a chance to run again.
 315         session->stop_capture();
 316         QApplication::processEvents();
 317
 318         for (shared_ptr<views::ViewBase> view : session->views())
 319                 remove_view(view);
 320
 321         QMainWindow *window = session_windows_.at(session);
 322         session_selector_.removeTab(session_selector_.indexOf(window));
 323
 324         session_windows_.erase(session);
 325
 326         if (last_focused_session_ == session)
 327                 last_focused_session_.reset();
 328
 329         // Remove the session from our list of sessions (which also destroys it)
 330         sessions_.remove_if([&](shared_ptr<Session> s) {
 331                 return s == session; });
 332
 333         if (sessions_.empty()) {
 334                 // When there are no more tabs, the height of the QTabWidget
 335                 // drops to zero. We must prevent this to keep the static
 336                 // widgets visible
 337                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 338                         w->setMinimumHeight(h);
 339
 340                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 341                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 342                 session_selector_.setMinimumHeight(h + 2 * margin);
 343
 344                 // Update the window title if there is no view left to
 345                 // generate focus change events
 346                 setWindowTitle(WindowTitle);
 347         }
 348 }
 349
 350 void MainWindow::setup_ui()
 351 {
 352         setObjectName(QString::fromUtf8("MainWindow"));
 353
 354         setCentralWidget(&session_selector_);
 355
 356         // Set the window icon
 357         QIcon icon;
 358         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 359         setWindowIcon(icon);
 360
 361         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 362         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 363
 364         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 365         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 366
 367         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 368         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 369
 370         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 371         view_coloured_bg_shortcut_->setAutoRepeat(false);
 372
 373         // Set up the tab area
 374         new_session_button_ = new QToolButton();
 375         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 376                 QIcon(":/icons/document-new.png")));
 377         new_session_button_->setToolTip(tr("Create New Session"));
 378         new_session_button_->setAutoRaise(true);
 379
 380         run_stop_button_ = new QToolButton();
 381         run_stop_button_->setAutoRaise(true);
 382         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 383         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 384
 385         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 386         run_stop_shortcut_->setAutoRepeat(false);
 387
 388         settings_button_ = new QToolButton();
 389         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 390                 QIcon(":/icons/preferences-system.png")));
 391         settings_button_->setToolTip(tr("Settings"));
 392         settings_button_->setAutoRaise(true);
 393
 394         QFrame *separator1 = new QFrame();
 395         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 396         QFrame *separator2 = new QFrame();
 397         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 398
 399         QHBoxLayout* layout = new QHBoxLayout();
 400         layout->setContentsMargins(2, 2, 2, 2);
 401         layout->addWidget(new_session_button_);
 402         layout->addWidget(separator1);
 403         layout->addWidget(run_stop_button_);
 404         layout->addWidget(separator2);
 405         layout->addWidget(settings_button_);
 406
 407         static_tab_widget_ = new QWidget();
 408         static_tab_widget_->setLayout(layout);
 409
 410         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 411         session_selector_.setTabsClosable(true);
 412
 413         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 414         close_application_shortcut_->setAutoRepeat(false);
 415
 416         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 417
 418         connect(new_session_button_, SIGNAL(clicked(bool)),
 419                 this, SLOT(on_new_session_clicked()));
 420         connect(run_stop_button_, SIGNAL(clicked(bool)),
 421                 this, SLOT(on_run_stop_clicked()));
 422         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 423                 this, SLOT(on_capture_state_changed(QObject*)));
 424         connect(settings_button_, SIGNAL(clicked(bool)),
 425                 this, SLOT(on_settings_clicked()));
 426
 427         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 428                 this, SLOT(on_tab_close_requested(int)));
 429         connect(&session_selector_, SIGNAL(currentChanged(int)),
 430                 this, SLOT(on_tab_changed(int)));
 431
 432
 433         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 434                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 435                 this, SLOT(on_focus_changed()));
 436 }
 437
 438 void MainWindow::save_ui_settings()
 439 {
 440         QSettings settings;
 441         int id = 0;
 442
 443         settings.beginGroup("MainWindow");
 444         settings.setValue("state", saveState());
 445         settings.setValue("geometry", saveGeometry());
 446         settings.endGroup();
 447
 448         for (shared_ptr<Session> session : sessions_) {
 449                 // Ignore sessions using the demo device or no device at all
 450                 if (session->device()) {
 451                         shared_ptr<devices::HardwareDevice> device =
 452                                 dynamic_pointer_cast< devices::HardwareDevice >
 453                                 (session->device());
 454
 455                         if (device &&
 456                                 device->hardware_device()->driver()->name() == "demo")
 457                                 continue;
 458
 459                         settings.beginGroup("Session" + QString::number(id++));
 460                         settings.remove("");  // Remove all keys in this group
 461                         session->save_settings(settings);
 462                         settings.endGroup();
 463                 }
 464         }
 465
 466         settings.setValue("sessions", id);
 467 }
 468
 469 void MainWindow::restore_ui_settings(bool restore_sessions)
 470 {
 471         QSettings settings;
 472
 473         settings.beginGroup("MainWindow");
 474
 475         if (settings.contains("geometry")) {
 476                 restoreGeometry(settings.value("geometry").toByteArray());
 477                 restoreState(settings.value("state").toByteArray());
 478         } else
 479                 resize(1000, 720);
 480
 481         settings.endGroup();
 482
 483         if (restore_sessions) {
 484                 int i, session_count;
 485
 486                 session_count = settings.value("sessions", 0).toInt();
 487
 488                 for (i = 0; i < session_count; i++) {
 489                         settings.beginGroup("Session" + QString::number(i));
 490                         shared_ptr<Session> session = add_session();
 491                         session->restore_settings(settings);
 492                         settings.endGroup();
 493                 }
 494         }
 495 }
 496
 497 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 498 {
 499         // Find the session that belongs to the tab's main window
 500         for (auto entry : session_windows_)
 501                 if (entry.second == session_selector_.widget(index))
 502                         return entry.first;
 503
 504         return nullptr;
 505 }
 506
 507 void MainWindow::closeEvent(QCloseEvent *event)
 508 {
 509         bool data_saved = true;
 510
 511         for (auto entry : session_windows_)
 512                 if (!entry.first->data_saved())
 513                         data_saved = false;
 514
 515         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 516                 tr("There is unsaved data. Close anyway?"),
 517                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 518                 event->ignore();
 519         } else {
 520                 save_ui_settings();
 521                 event->accept();
 522         }
 523 }
 524
 525 QMenu* MainWindow::createPopupMenu()
 526 {
 527         return nullptr;
 528 }
 529
 530 bool MainWindow::restoreState(const QByteArray &state, int version)
 531 {
 532         (void)state;
 533         (void)version;
 534
 535         // Do nothing. We don't want Qt to handle this, or else it
 536         // will try to restore all the dock widgets and create havoc.
 537
 538         return false;
 539 }
 540
 541 void MainWindow::session_error(const QString text, const QString info_text)
 542 {
 543         QMetaObject::invokeMethod(this, "show_session_error",
 544                 Qt::QueuedConnection, Q_ARG(QString, text),
 545                 Q_ARG(QString, info_text));
 546 }
 547
 548 void MainWindow::show_session_error(const QString text, const QString info_text)
 549 {
 550         QMessageBox msg(this);
 551         msg.setText(text);
 552         msg.setInformativeText(info_text);
 553         msg.setStandardButtons(QMessageBox::Ok);
 554         msg.setIcon(QMessageBox::Warning);
 555         msg.exec();
 556 }
 557
 558 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 559         Session *session)
 560 {
 561         // We get a pointer and need a reference
 562         for (shared_ptr<Session> s : sessions_)
 563                 if (s.get() == session)
 564                         add_view(title, type, *s);
 565 }
 566
 567 void MainWindow::on_focus_changed()
 568 {
 569         shared_ptr<views::ViewBase> view = get_active_view();
 570
 571         if (view) {
 572                 for (shared_ptr<Session> session : sessions_) {
 573                         if (session->has_view(view)) {
 574                                 if (session != last_focused_session_) {
 575                                         // Activate correct tab if necessary
 576                                         shared_ptr<Session> tab_session = get_tab_session(
 577                                                 session_selector_.currentIndex());
 578                                         if (tab_session != session)
 579                                                 session_selector_.setCurrentWidget(
 580                                                         session_windows_.at(session));
 581
 582                                         on_focused_session_changed(session);
 583                                 }
 584
 585                                 break;
 586                         }
 587                 }
 588         }
 589
 590         if (sessions_.empty())
 591                 setWindowTitle(WindowTitle);
 592 }
 593
 594 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 595 {
 596         last_focused_session_ = session;
 597
 598         setWindowTitle(session->name() + " - " + WindowTitle);
 599
 600         // Update the state of the run/stop button, too
 601         on_capture_state_changed(session.get());
 602 }
 603
 604 void MainWindow::on_new_session_clicked()
 605 {
 606         add_session();
 607 }
 608
 609 void MainWindow::on_run_stop_clicked()
 610 {
 611         shared_ptr<Session> session = last_focused_session_;
 612
 613         if (!session)
 614                 return;
 615
 616         switch (session->get_capture_state()) {
 617         case Session::Stopped:
 618                 session->start_capture([&](QString message) {
 619                         session_error("Capture failed", message); });
 620                 break;
 621         case Session::AwaitingTrigger:
 622         case Session::Running:
 623                 session->stop_capture();
 624                 break;
 625         }
 626 }
 627
 628 void MainWindow::on_settings_clicked()
 629 {
 630         dialogs::Settings dlg(device_manager_);
 631         dlg.exec();
 632 }
 633
 634 void MainWindow::on_session_name_changed()
 635 {
 636         // Update the corresponding dock widget's name(s)
 637         Session *session = qobject_cast<Session*>(QObject::sender());
 638         assert(session);
 639
 640         for (shared_ptr<views::ViewBase> view : session->views()) {
 641                 // Get the dock that contains the view
 642                 for (auto entry : view_docks_)
 643                         if (entry.second == view) {
 644                                 entry.first->setObjectName(session->name());
 645                                 entry.first->setWindowTitle(session->name());
 646                         }
 647         }
 648
 649         // Update the tab widget by finding the main window and the tab from that
 650         for (auto entry : session_windows_)
 651                 if (entry.first.get() == session) {
 652                         QMainWindow *window = entry.second;
 653                         const int index = session_selector_.indexOf(window);
 654                         session_selector_.setTabText(index, session->name());
 655                 }
 656
 657         // Refresh window title if the affected session has focus
 658         if (session == last_focused_session_.get())
 659                 setWindowTitle(session->name() + " - " + WindowTitle);
 660 }
 661
 662 void MainWindow::on_capture_state_changed(QObject *obj)
 663 {
 664         Session *caller = qobject_cast<Session*>(obj);
 665
 666         // Ignore if caller is not the currently focused session
 667         // unless there is only one session
 668         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 669                 return;
 670
 671         int state = caller->get_capture_state();
 672
 673         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 674         run_stop_button_->setIcon(*icons[state]);
 675         run_stop_button_->setText((state == pv::Session::Stopped) ?
 676                 tr("Run") : tr("Stop"));
 677 }
 678
 679 void MainWindow::on_new_view(Session *session)
 680 {
 681         // We get a pointer and need a reference
 682         for (shared_ptr<Session> s : sessions_)
 683                 if (s.get() == session)
 684                         add_view(session->name(), views::ViewTypeTrace, *s);
 685 }
 686
 687 void MainWindow::on_view_close_clicked()
 688 {
 689         // Find the dock widget that contains the close button that was clicked
 690         QObject *w = QObject::sender();
 691         QDockWidget *dock = nullptr;
 692
 693         while (w) {
 694             dock = qobject_cast<QDockWidget*>(w);
 695             if (dock)
 696                 break;
 697             w = w->parent();
 698         }
 699
 700         // Get the view contained in the dock widget
 701         shared_ptr<views::ViewBase> view;
 702
 703         for (auto entry : view_docks_)
 704                 if (entry.first == dock)
 705                         view = entry.second;
 706
 707         // Deregister the view
 708         for (shared_ptr<Session> session : sessions_) {
 709                 if (!session->has_view(view))
 710                         continue;
 711
 712                 // Also destroy the entire session if its main view is closing...
 713                 if (view == session->main_view()) {
 714                         // ...but only if data is saved or the user confirms closing
 715                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 716                                 tr("This session contains unsaved data. Close it anyway?"),
 717                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 718                                 remove_session(session);
 719                         break;
 720                 } else
 721                         // All other views can be closed at any time as no data will be lost
 722                         remove_view(view);
 723         }
 724 }
 725
 726 void MainWindow::on_tab_changed(int index)
 727 {
 728         shared_ptr<Session> session = get_tab_session(index);
 729
 730         if (session)
 731                 on_focused_session_changed(session);
 732 }
 733
 734 void MainWindow::on_tab_close_requested(int index)
 735 {
 736         shared_ptr<Session> session = get_tab_session(index);
 737
 738         if (!session)
 739                 return;
 740
 741         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 742                 tr("This session contains unsaved data. Close it anyway?"),
 743                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 744                 remove_session(session);
 745 }
 746
 747 void MainWindow::on_view_coloured_bg_shortcut()
 748 {
 749         GlobalSettings settings;
 750
 751         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
 752         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
 753 }
 754
 755 void MainWindow::on_view_sticky_scrolling_shortcut()
 756 {
 757         GlobalSettings settings;
 758
 759         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 760         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 761 }
 762
 763 void MainWindow::on_view_show_sampling_points_shortcut()
 764 {
 765         GlobalSettings settings;
 766
 767         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 768         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 769 }
 770
 771 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 772 {
 773         GlobalSettings settings;
 774
 775         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 776         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 777 }
 778
 779 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
 780 {
 781         bool state = new_value.toBool();
 782
 783         for (auto entry : view_docks_) {
 784                 shared_ptr<views::ViewBase> viewbase = entry.second;
 785
 786                 // Only trace views have this setting
 787                 views::TraceView::View* view =
 788                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 789                 if (view)
 790                         view->enable_coloured_bg(state);
 791         }
 792 }
 793
 794 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
 795 {
 796         bool state = new_value.toBool();
 797
 798         for (auto entry : view_docks_) {
 799                 shared_ptr<views::ViewBase> viewbase = entry.second;
 800
 801                 // Only trace views have this setting
 802                 views::TraceView::View* view =
 803                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 804                 if (view)
 805                         view->enable_show_sampling_points(state);
 806         }
 807 }
 808
 809 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
 810 {
 811         bool state = new_value.toBool();
 812
 813         for (auto entry : view_docks_) {
 814                 shared_ptr<views::ViewBase> viewbase = entry.second;
 815
 816                 // Only trace views have this setting
 817                 views::TraceView::View* view =
 818                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 819                 if (view)
 820                         view->enable_show_analog_minor_grid(state);
 821         }
 822 }
 823
 824 void MainWindow::on_close_current_tab()
 825 {
 826         int tab = session_selector_.currentIndex();
 827
 828         on_tab_close_requested(tab);
 829 }
 830
 831 } // namespace pv