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         int h = new_session_button_->height();
 307
 308         for (shared_ptr<views::ViewBase> view : session->views())
 309                 remove_view(view);
 310
 311         QMainWindow *window = session_windows_.at(session);
 312         session_selector_.removeTab(session_selector_.indexOf(window));
 313
 314         session_windows_.erase(session);
 315
 316         if (last_focused_session_ == session)
 317                 last_focused_session_.reset();
 318
 319         sessions_.remove_if([&](shared_ptr<Session> s) {
 320                 return s == session; });
 321
 322         if (sessions_.empty()) {
 323                 // When there are no more tabs, the height of the QTabWidget
 324                 // drops to zero. We must prevent this to keep the static
 325                 // widgets visible
 326                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 327                         w->setMinimumHeight(h);
 328
 329                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 330                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 331                 session_selector_.setMinimumHeight(h + 2 * margin);
 332
 333                 // Update the window title if there is no view left to
 334                 // generate focus change events
 335                 setWindowTitle(WindowTitle);
 336         }
 337 }
 338
 339 void MainWindow::setup_ui()
 340 {
 341         setObjectName(QString::fromUtf8("MainWindow"));
 342
 343         setCentralWidget(&session_selector_);
 344
 345         // Set the window icon
 346         QIcon icon;
 347         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 348         setWindowIcon(icon);
 349
 350         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 351         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 352
 353         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 354         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 355
 356         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 357         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 358
 359         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
 360         view_coloured_bg_shortcut_->setAutoRepeat(false);
 361
 362         // Set up the tab area
 363         new_session_button_ = new QToolButton();
 364         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 365                 QIcon(":/icons/document-new.png")));
 366         new_session_button_->setToolTip(tr("Create New Session"));
 367         new_session_button_->setAutoRaise(true);
 368
 369         run_stop_button_ = new QToolButton();
 370         run_stop_button_->setAutoRaise(true);
 371         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 372         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 373
 374         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 375         run_stop_shortcut_->setAutoRepeat(false);
 376
 377         settings_button_ = new QToolButton();
 378         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 379                 QIcon(":/icons/preferences-system.png")));
 380         settings_button_->setToolTip(tr("Settings"));
 381         settings_button_->setAutoRaise(true);
 382
 383         QFrame *separator1 = new QFrame();
 384         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 385         QFrame *separator2 = new QFrame();
 386         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 387
 388         QHBoxLayout* layout = new QHBoxLayout();
 389         layout->setContentsMargins(2, 2, 2, 2);
 390         layout->addWidget(new_session_button_);
 391         layout->addWidget(separator1);
 392         layout->addWidget(run_stop_button_);
 393         layout->addWidget(separator2);
 394         layout->addWidget(settings_button_);
 395
 396         static_tab_widget_ = new QWidget();
 397         static_tab_widget_->setLayout(layout);
 398
 399         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 400         session_selector_.setTabsClosable(true);
 401
 402         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 403         close_application_shortcut_->setAutoRepeat(false);
 404
 405         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 406
 407         connect(new_session_button_, SIGNAL(clicked(bool)),
 408                 this, SLOT(on_new_session_clicked()));
 409         connect(run_stop_button_, SIGNAL(clicked(bool)),
 410                 this, SLOT(on_run_stop_clicked()));
 411         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 412                 this, SLOT(on_capture_state_changed(QObject*)));
 413         connect(settings_button_, SIGNAL(clicked(bool)),
 414                 this, SLOT(on_settings_clicked()));
 415
 416         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 417                 this, SLOT(on_tab_close_requested(int)));
 418         connect(&session_selector_, SIGNAL(currentChanged(int)),
 419                 this, SLOT(on_tab_changed(int)));
 420
 421
 422         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 423                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 424                 this, SLOT(on_focus_changed()));
 425 }
 426
 427 void MainWindow::save_ui_settings()
 428 {
 429         QSettings settings;
 430         int id = 0;
 431
 432         settings.beginGroup("MainWindow");
 433         settings.setValue("state", saveState());
 434         settings.setValue("geometry", saveGeometry());
 435         settings.endGroup();
 436
 437         for (shared_ptr<Session> session : sessions_) {
 438                 // Ignore sessions using the demo device or no device at all
 439                 if (session->device()) {
 440                         shared_ptr<devices::HardwareDevice> device =
 441                                 dynamic_pointer_cast< devices::HardwareDevice >
 442                                 (session->device());
 443
 444                         if (device &&
 445                                 device->hardware_device()->driver()->name() == "demo")
 446                                 continue;
 447
 448                         settings.beginGroup("Session" + QString::number(id++));
 449                         settings.remove("");  // Remove all keys in this group
 450                         session->save_settings(settings);
 451                         settings.endGroup();
 452                 }
 453         }
 454
 455         settings.setValue("sessions", id);
 456 }
 457
 458 void MainWindow::restore_ui_settings(bool restore_sessions)
 459 {
 460         QSettings settings;
 461
 462         settings.beginGroup("MainWindow");
 463
 464         if (settings.contains("geometry")) {
 465                 restoreGeometry(settings.value("geometry").toByteArray());
 466                 restoreState(settings.value("state").toByteArray());
 467         } else
 468                 resize(1000, 720);
 469
 470         settings.endGroup();
 471
 472         if (restore_sessions) {
 473                 int i, session_count;
 474
 475                 session_count = settings.value("sessions", 0).toInt();
 476
 477                 for (i = 0; i < session_count; i++) {
 478                         settings.beginGroup("Session" + QString::number(i));
 479                         shared_ptr<Session> session = add_session();
 480                         session->restore_settings(settings);
 481                         settings.endGroup();
 482                 }
 483         }
 484 }
 485
 486 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 487 {
 488         // Find the session that belongs to the tab's main window
 489         for (auto entry : session_windows_)
 490                 if (entry.second == session_selector_.widget(index))
 491                         return entry.first;
 492
 493         return nullptr;
 494 }
 495
 496 void MainWindow::closeEvent(QCloseEvent *event)
 497 {
 498         bool data_saved = true;
 499
 500         for (auto entry : session_windows_)
 501                 if (!entry.first->data_saved())
 502                         data_saved = false;
 503
 504         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 505                 tr("There is unsaved data. Close anyway?"),
 506                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 507                 event->ignore();
 508         } else {
 509                 save_ui_settings();
 510                 event->accept();
 511         }
 512 }
 513
 514 QMenu* MainWindow::createPopupMenu()
 515 {
 516         return nullptr;
 517 }
 518
 519 bool MainWindow::restoreState(const QByteArray &state, int version)
 520 {
 521         (void)state;
 522         (void)version;
 523
 524         // Do nothing. We don't want Qt to handle this, or else it
 525         // will try to restore all the dock widgets and create havoc.
 526
 527         return false;
 528 }
 529
 530 void MainWindow::session_error(const QString text, const QString info_text)
 531 {
 532         QMetaObject::invokeMethod(this, "show_session_error",
 533                 Qt::QueuedConnection, Q_ARG(QString, text),
 534                 Q_ARG(QString, info_text));
 535 }
 536
 537 void MainWindow::show_session_error(const QString text, const QString info_text)
 538 {
 539         QMessageBox msg(this);
 540         msg.setText(text);
 541         msg.setInformativeText(info_text);
 542         msg.setStandardButtons(QMessageBox::Ok);
 543         msg.setIcon(QMessageBox::Warning);
 544         msg.exec();
 545 }
 546
 547 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 548         Session *session)
 549 {
 550         // We get a pointer and need a reference
 551         for (shared_ptr<Session> s : sessions_)
 552                 if (s.get() == session)
 553                         add_view(title, type, *s);
 554 }
 555
 556 void MainWindow::on_focus_changed()
 557 {
 558         shared_ptr<views::ViewBase> view = get_active_view();
 559
 560         if (view) {
 561                 for (shared_ptr<Session> session : sessions_) {
 562                         if (session->has_view(view)) {
 563                                 if (session != last_focused_session_) {
 564                                         // Activate correct tab if necessary
 565                                         shared_ptr<Session> tab_session = get_tab_session(
 566                                                 session_selector_.currentIndex());
 567                                         if (tab_session != session)
 568                                                 session_selector_.setCurrentWidget(
 569                                                         session_windows_.at(session));
 570
 571                                         on_focused_session_changed(session);
 572                                 }
 573
 574                                 break;
 575                         }
 576                 }
 577         }
 578
 579         if (sessions_.empty())
 580                 setWindowTitle(WindowTitle);
 581 }
 582
 583 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 584 {
 585         last_focused_session_ = session;
 586
 587         setWindowTitle(session->name() + " - " + WindowTitle);
 588
 589         // Update the state of the run/stop button, too
 590         on_capture_state_changed(session.get());
 591 }
 592
 593 void MainWindow::on_new_session_clicked()
 594 {
 595         add_session();
 596 }
 597
 598 void MainWindow::on_run_stop_clicked()
 599 {
 600         shared_ptr<Session> session = last_focused_session_;
 601
 602         if (!session)
 603                 return;
 604
 605         switch (session->get_capture_state()) {
 606         case Session::Stopped:
 607                 session->start_capture([&](QString message) {
 608                         session_error("Capture failed", message); });
 609                 break;
 610         case Session::AwaitingTrigger:
 611         case Session::Running:
 612                 session->stop_capture();
 613                 break;
 614         }
 615 }
 616
 617 void MainWindow::on_settings_clicked()
 618 {
 619         dialogs::Settings dlg(device_manager_);
 620         dlg.exec();
 621 }
 622
 623 void MainWindow::on_session_name_changed()
 624 {
 625         // Update the corresponding dock widget's name(s)
 626         Session *session = qobject_cast<Session*>(QObject::sender());
 627         assert(session);
 628
 629         for (shared_ptr<views::ViewBase> view : session->views()) {
 630                 // Get the dock that contains the view
 631                 for (auto entry : view_docks_)
 632                         if (entry.second == view) {
 633                                 entry.first->setObjectName(session->name());
 634                                 entry.first->setWindowTitle(session->name());
 635                         }
 636         }
 637
 638         // Update the tab widget by finding the main window and the tab from that
 639         for (auto entry : session_windows_)
 640                 if (entry.first.get() == session) {
 641                         QMainWindow *window = entry.second;
 642                         const int index = session_selector_.indexOf(window);
 643                         session_selector_.setTabText(index, session->name());
 644                 }
 645
 646         // Refresh window title if the affected session has focus
 647         if (session == last_focused_session_.get())
 648                 setWindowTitle(session->name() + " - " + WindowTitle);
 649 }
 650
 651 void MainWindow::on_capture_state_changed(QObject *obj)
 652 {
 653         Session *caller = qobject_cast<Session*>(obj);
 654
 655         // Ignore if caller is not the currently focused session
 656         // unless there is only one session
 657         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 658                 return;
 659
 660         int state = caller->get_capture_state();
 661
 662         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 663         run_stop_button_->setIcon(*icons[state]);
 664         run_stop_button_->setText((state == pv::Session::Stopped) ?
 665                 tr("Run") : tr("Stop"));
 666 }
 667
 668 void MainWindow::on_new_view(Session *session)
 669 {
 670         // We get a pointer and need a reference
 671         for (shared_ptr<Session> s : sessions_)
 672                 if (s.get() == session)
 673                         add_view(session->name(), views::ViewTypeTrace, *s);
 674 }
 675
 676 void MainWindow::on_view_close_clicked()
 677 {
 678         // Find the dock widget that contains the close button that was clicked
 679         QObject *w = QObject::sender();
 680         QDockWidget *dock = nullptr;
 681
 682         while (w) {
 683             dock = qobject_cast<QDockWidget*>(w);
 684             if (dock)
 685                 break;
 686             w = w->parent();
 687         }
 688
 689         // Get the view contained in the dock widget
 690         shared_ptr<views::ViewBase> view;
 691
 692         for (auto entry : view_docks_)
 693                 if (entry.first == dock)
 694                         view = entry.second;
 695
 696         // Deregister the view
 697         for (shared_ptr<Session> session : sessions_) {
 698                 if (!session->has_view(view))
 699                         continue;
 700
 701                 // Also destroy the entire session if its main view is closing...
 702                 if (view == session->main_view()) {
 703                         // ...but only if data is saved or the user confirms closing
 704                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 705                                 tr("This session contains unsaved data. Close it anyway?"),
 706                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 707                                 remove_session(session);
 708                         break;
 709                 } else
 710                         // All other views can be closed at any time as no data will be lost
 711                         remove_view(view);
 712         }
 713 }
 714
 715 void MainWindow::on_tab_changed(int index)
 716 {
 717         shared_ptr<Session> session = get_tab_session(index);
 718
 719         if (session)
 720                 on_focused_session_changed(session);
 721 }
 722
 723 void MainWindow::on_tab_close_requested(int index)
 724 {
 725         shared_ptr<Session> session = get_tab_session(index);
 726
 727         if (!session)
 728                 return;
 729
 730         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 731                 tr("This session contains unsaved data. Close it anyway?"),
 732                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 733                 remove_session(session);
 734 }
 735
 736 void MainWindow::on_view_coloured_bg_shortcut()
 737 {
 738         GlobalSettings settings;
 739
 740         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
 741         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
 742 }
 743
 744 void MainWindow::on_view_sticky_scrolling_shortcut()
 745 {
 746         GlobalSettings settings;
 747
 748         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 749         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 750 }
 751
 752 void MainWindow::on_view_show_sampling_points_shortcut()
 753 {
 754         GlobalSettings settings;
 755
 756         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 757         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 758 }
 759
 760 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 761 {
 762         GlobalSettings settings;
 763
 764         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 765         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 766 }
 767
 768 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
 769 {
 770         bool state = new_value.toBool();
 771
 772         for (auto entry : view_docks_) {
 773                 shared_ptr<views::ViewBase> viewbase = entry.second;
 774
 775                 // Only trace views have this setting
 776                 views::TraceView::View* view =
 777                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 778                 if (view)
 779                         view->enable_coloured_bg(state);
 780         }
 781 }
 782
 783 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
 784 {
 785         bool state = new_value.toBool();
 786
 787         for (auto entry : view_docks_) {
 788                 shared_ptr<views::ViewBase> viewbase = entry.second;
 789
 790                 // Only trace views have this setting
 791                 views::TraceView::View* view =
 792                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 793                 if (view)
 794                         view->enable_show_sampling_points(state);
 795         }
 796 }
 797
 798 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
 799 {
 800         bool state = new_value.toBool();
 801
 802         for (auto entry : view_docks_) {
 803                 shared_ptr<views::ViewBase> viewbase = entry.second;
 804
 805                 // Only trace views have this setting
 806                 views::TraceView::View* view =
 807                                 qobject_cast<views::TraceView::View*>(viewbase.get());
 808                 if (view)
 809                         view->enable_show_analog_minor_grid(state);
 810         }
 811 }
 812
 813 void MainWindow::on_close_current_tab()
 814 {
 815         int tab = session_selector_.currentIndex();
 816
 817         on_tab_close_requested(tab);
 818 }
 819
 820 } // namespace pv