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