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 "util.hpp"
  43 #include "devices/hardwaredevice.hpp"
  44 #include "dialogs/about.hpp"
  45 #include "toolbars/mainbar.hpp"
  46 #include "view/view.hpp"
  47 #include "views/trace/standardbar.hpp"
  48
  49 #include <stdint.h>
  50 #include <stdarg.h>
  51 #include <libsigrokcxx/libsigrokcxx.hpp>
  52
  53 using std::dynamic_pointer_cast;
  54 using std::list;
  55 using std::make_shared;
  56 using std::map;
  57 using std::shared_ptr;
  58 using std::string;
  59
  60 namespace pv {
  61
  62 namespace view {
  63 class ViewItem;
  64 }
  65
  66 using toolbars::MainBar;
  67
  68 const QString MainWindow::WindowTitle = tr("PulseView");
  69
  70 MainWindow::MainWindow(DeviceManager &device_manager,
  71         string open_file_name, string open_file_format,
  72         QWidget *parent) :
  73         QMainWindow(parent),
  74         device_manager_(device_manager),
  75         session_selector_(this),
  76         session_state_mapper_(this),
  77         action_view_sticky_scrolling_(new QAction(this)),
  78         action_view_coloured_bg_(new QAction(this)),
  79         action_about_(new QAction(this)),
  80         icon_red_(":/icons/status-red.svg"),
  81         icon_green_(":/icons/status-green.svg"),
  82         icon_grey_(":/icons/status-grey.svg")
  83 {
  84         qRegisterMetaType<util::Timestamp>("util::Timestamp");
  85         qRegisterMetaType<uint64_t>("uint64_t");
  86
  87         setup_ui();
  88         restore_ui_settings();
  89
  90         if (!open_file_name.empty()) {
  91                 shared_ptr<Session> session = add_session();
  92                 session->load_init_file(open_file_name, open_file_format);
  93         }
  94
  95         // Add empty default session if there aren't any sessions
  96         if (sessions_.size() == 0) {
  97                 shared_ptr<Session> session = add_session();
  98
  99                 map<string, string> dev_info;
 100                 shared_ptr<devices::HardwareDevice> other_device, demo_device;
 101
 102                 // Use any available device that's not demo
 103                 for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
 104                         if (dev->hardware_device()->driver()->name() == "demo") {
 105                                 demo_device = dev;
 106                         } else {
 107                                 other_device = dev;
 108                         }
 109                 }
 110
 111                 // ...and if there isn't any, just use demo then
 112                 session->select_device(other_device ? other_device : demo_device);
 113         }
 114 }
 115
 116 MainWindow::~MainWindow()
 117 {
 118         while (!sessions_.empty())
 119                 remove_session(sessions_.front());
 120 }
 121
 122 QAction* MainWindow::action_view_sticky_scrolling() const
 123 {
 124         return action_view_sticky_scrolling_;
 125 }
 126
 127 QAction* MainWindow::action_view_coloured_bg() const
 128 {
 129         return action_view_coloured_bg_;
 130 }
 131
 132 QAction* MainWindow::action_about() const
 133 {
 134         return action_about_;
 135 }
 136
 137 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 138 {
 139         // If there's only one view, use it...
 140         if (view_docks_.size() == 1)
 141                 return view_docks_.begin()->second;
 142
 143         // ...otherwise find the dock widget the widget with focus is contained in
 144         QObject *w = QApplication::focusWidget();
 145         QDockWidget *dock = 0;
 146
 147         while (w) {
 148             dock = qobject_cast<QDockWidget*>(w);
 149             if (dock)
 150                 break;
 151             w = w->parent();
 152         }
 153
 154         // Get the view contained in the dock widget
 155         for (auto entry : view_docks_)
 156                 if (entry.first == dock)
 157                         return entry.second;
 158
 159         return nullptr;
 160 }
 161
 162 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 163         views::ViewType type, Session &session)
 164 {
 165         QMainWindow *main_window = nullptr;
 166         for (auto entry : session_windows_)
 167                 if (entry.first.get() == &session)
 168                         main_window = entry.second;
 169
 170         assert(main_window);
 171
 172         if (type == views::ViewTypeTrace) {
 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                 shared_ptr<views::TraceView::View> v =
 182                         make_shared<views::TraceView::View>(session, dock_main);
 183                 view_docks_[dock] = v;
 184                 session.register_view(v);
 185
 186                 dock_main->setCentralWidget(v.get());
 187                 dock->setWidget(dock_main);
 188
 189                 dock->setFeatures(QDockWidget::DockWidgetMovable |
 190                         QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 191
 192                 QAbstractButton *close_btn =
 193                         dock->findChildren<QAbstractButton*>
 194                                 ("qt_dockwidget_closebutton").front();
 195
 196                 connect(close_btn, SIGNAL(clicked(bool)),
 197                         this, SLOT(on_view_close_clicked()));
 198
 199                 if (type == views::ViewTypeTrace) {
 200                         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
 201                                 qobject_cast<views::ViewBase*>(v.get()),
 202                                 SLOT(trigger_event(util::Timestamp)));
 203
 204                         v->enable_sticky_scrolling(action_view_sticky_scrolling_->isChecked());
 205                         v->enable_coloured_bg(action_view_coloured_bg_->isChecked());
 206
 207                         shared_ptr<MainBar> main_bar = session.main_bar();
 208                         if (!main_bar) {
 209                                 /* Initial view, create the main bar */
 210                                 main_bar = make_shared<MainBar>(session, this, v.get());
 211                                 dock_main->addToolBar(main_bar.get());
 212                                 session.set_main_bar(main_bar);
 213
 214                                 connect(main_bar.get(), SIGNAL(new_view(Session*)),
 215                                         this, SLOT(on_new_view(Session*)));
 216
 217                                 main_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 218
 219                                 /* For the main view we need to prevent the dock widget from
 220                                  * closing itself when its close button is clicked. This is
 221                                  * so we can confirm with the user first. Regular views don't
 222                                  * need this */
 223                                 close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 224                         } else {
 225                                 /* Additional view, create a standard bar */
 226                                 pv::views::trace::StandardBar *standard_bar =
 227                                         new pv::views::trace::StandardBar(session, this, v.get());
 228                                 dock_main->addToolBar(standard_bar);
 229
 230                                 standard_bar->action_view_show_cursors()->setChecked(v->cursors_shown());
 231                         }
 232                 }
 233
 234                 return v;
 235         }
 236
 237         return nullptr;
 238 }
 239
 240 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 241 {
 242         for (shared_ptr<Session> session : sessions_) {
 243                 if (!session->has_view(view))
 244                         continue;
 245
 246                 // Find the dock the view is contained in and remove it
 247                 for (auto entry : view_docks_)
 248                         if (entry.second == view) {
 249                                 // Remove the view from the session
 250                                 session->deregister_view(view);
 251
 252                                 // Remove the view from its parent; otherwise, Qt will
 253                                 // call deleteLater() on it, which causes a double free
 254                                 // since the shared_ptr in view_docks_ doesn't know
 255                                 // that Qt keeps a pointer to the view around
 256                                 view->setParent(0);
 257
 258                                 // Delete the view's dock widget and all widgets inside it
 259                                 entry.first->deleteLater();
 260
 261                                 // Remove the dock widget from the list and stop iterating
 262                                 view_docks_.erase(entry.first);
 263                                 break;
 264                         }
 265         }
 266 }
 267
 268 shared_ptr<Session> MainWindow::add_session()
 269 {
 270         static int last_session_id = 1;
 271         QString name = tr("Session %1").arg(last_session_id++);
 272
 273         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 274
 275         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 276                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 277         connect(session.get(), SIGNAL(name_changed()),
 278                 this, SLOT(on_session_name_changed()));
 279         session_state_mapper_.setMapping(session.get(), session.get());
 280         connect(session.get(), SIGNAL(capture_state_changed(int)),
 281                 &session_state_mapper_, SLOT(map()));
 282
 283         sessions_.push_back(session);
 284
 285         QMainWindow *window = new QMainWindow();
 286         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 287         session_windows_[session] = window;
 288
 289         int index = session_selector_.addTab(window, name);
 290         session_selector_.setCurrentIndex(index);
 291         last_focused_session_ = session;
 292
 293         window->setDockNestingEnabled(true);
 294
 295         shared_ptr<views::ViewBase> main_view =
 296                 add_view(name, views::ViewTypeTrace, *session);
 297
 298         return session;
 299 }
 300
 301 void MainWindow::remove_session(shared_ptr<Session> session)
 302 {
 303         int h = new_session_button_->height();
 304
 305         for (shared_ptr<views::ViewBase> view : session->views())
 306                 remove_view(view);
 307
 308         QMainWindow *window = session_windows_.at(session);
 309         session_selector_.removeTab(session_selector_.indexOf(window));
 310
 311         session_windows_.erase(session);
 312
 313         if (last_focused_session_ == session)
 314                 last_focused_session_.reset();
 315
 316         sessions_.remove_if([&](shared_ptr<Session> s) {
 317                 return s == session; });
 318
 319         if (sessions_.empty()) {
 320                 // When there are no more tabs, the height of the QTabWidget
 321                 // drops to zero. We must prevent this to keep the static
 322                 // widgets visible
 323                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
 324                         w->setMinimumHeight(h);
 325
 326                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 327                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 328                 session_selector_.setMinimumHeight(h + 2 * margin);
 329
 330                 // Update the window title if there is no view left to
 331                 // generate focus change events
 332                 setWindowTitle(WindowTitle);
 333         }
 334 }
 335
 336 void MainWindow::setup_ui()
 337 {
 338         setObjectName(QString::fromUtf8("MainWindow"));
 339
 340         setCentralWidget(&session_selector_);
 341
 342         // Set the window icon
 343         QIcon icon;
 344         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
 345         setWindowIcon(icon);
 346
 347         action_view_sticky_scrolling_->setCheckable(true);
 348         action_view_sticky_scrolling_->setChecked(true);
 349         action_view_sticky_scrolling_->setShortcut(QKeySequence(Qt::Key_S));
 350         action_view_sticky_scrolling_->setObjectName(
 351                 QString::fromUtf8("actionViewStickyScrolling"));
 352         action_view_sticky_scrolling_->setText(tr("&Sticky Scrolling"));
 353
 354         action_view_coloured_bg_->setCheckable(true);
 355         action_view_coloured_bg_->setChecked(true);
 356         action_view_coloured_bg_->setShortcut(QKeySequence(Qt::Key_B));
 357         action_view_coloured_bg_->setObjectName(
 358                 QString::fromUtf8("actionViewColouredBg"));
 359         action_view_coloured_bg_->setText(tr("Use &Coloured Backgrounds"));
 360
 361         action_about_->setObjectName(QString::fromUtf8("actionAbout"));
 362         action_about_->setToolTip(tr("&About..."));
 363
 364         // Set up the tab area
 365         new_session_button_ = new QToolButton();
 366         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 367                 QIcon(":/icons/document-new.png")));
 368         new_session_button_->setToolTip(tr("Create New Session"));
 369         new_session_button_->setAutoRaise(true);
 370
 371         run_stop_button_ = new QToolButton();
 372         run_stop_button_->setAutoRaise(true);
 373         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 374         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 375
 376         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 377         run_stop_shortcut_->setAutoRepeat(false);
 378
 379         settings_button_ = new QToolButton();
 380         settings_button_->setIcon(QIcon::fromTheme("configure",
 381                 QIcon(":/icons/configure.png")));
 382         settings_button_->setToolTip(tr("Settings"));
 383         settings_button_->setAutoRaise(true);
 384
 385         QFrame *separator1 = new QFrame();
 386         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 387         QFrame *separator2 = new QFrame();
 388         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 389
 390         QHBoxLayout* layout = new QHBoxLayout();
 391         layout->setContentsMargins(2, 2, 2, 2);
 392         layout->addWidget(new_session_button_);
 393         layout->addWidget(separator1);
 394         layout->addWidget(run_stop_button_);
 395         layout->addWidget(separator2);
 396         layout->addWidget(settings_button_);
 397
 398         static_tab_widget_ = new QWidget();
 399         static_tab_widget_->setLayout(layout);
 400
 401         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 402         session_selector_.setTabsClosable(true);
 403
 404         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 405         close_application_shortcut_->setAutoRepeat(false);
 406
 407         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 408
 409         connect(new_session_button_, SIGNAL(clicked(bool)),
 410                 this, SLOT(on_new_session_clicked()));
 411         connect(run_stop_button_, SIGNAL(clicked(bool)),
 412                 this, SLOT(on_run_stop_clicked()));
 413         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 414                 this, SLOT(on_capture_state_changed(QObject*)));
 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()
 459 {
 460         QSettings settings;
 461         int i, session_count;
 462
 463         settings.beginGroup("MainWindow");
 464
 465         if (settings.contains("geometry")) {
 466                 restoreGeometry(settings.value("geometry").toByteArray());
 467                 restoreState(settings.value("state").toByteArray());
 468         } else
 469                 resize(1000, 720);
 470
 471         settings.endGroup();
 472
 473         session_count = settings.value("sessions", 0).toInt();
 474
 475         for (i = 0; i < session_count; i++) {
 476                 settings.beginGroup("Session" + QString::number(i));
 477                 shared_ptr<Session> session = add_session();
 478                 session->restore_settings(settings);
 479                 settings.endGroup();
 480         }
 481 }
 482
 483 std::shared_ptr<Session> MainWindow::get_tab_session(int index) const
 484 {
 485         // Find the session that belongs to the tab's main window
 486         for (auto entry : session_windows_)
 487                 if (entry.second == session_selector_.widget(index))
 488                         return entry.first;
 489
 490         return nullptr;
 491 }
 492
 493 void MainWindow::closeEvent(QCloseEvent *event)
 494 {
 495         bool data_saved = true;
 496
 497         for (auto entry : session_windows_)
 498                 if (!entry.first->data_saved())
 499                         data_saved = false;
 500
 501         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 502                 tr("There is unsaved data. Close anyway?"),
 503                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 504                 event->ignore();
 505         } else {
 506                 save_ui_settings();
 507                 event->accept();
 508         }
 509 }
 510
 511 QMenu* MainWindow::createPopupMenu()
 512 {
 513         return nullptr;
 514 }
 515
 516 bool MainWindow::restoreState(const QByteArray &state, int version)
 517 {
 518         (void)state;
 519         (void)version;
 520
 521         // Do nothing. We don't want Qt to handle this, or else it
 522         // will try to restore all the dock widgets and create havoc.
 523
 524         return false;
 525 }
 526
 527 void MainWindow::session_error(const QString text, const QString info_text)
 528 {
 529         QMetaObject::invokeMethod(this, "show_session_error",
 530                 Qt::QueuedConnection, Q_ARG(QString, text),
 531                 Q_ARG(QString, info_text));
 532 }
 533
 534 void MainWindow::show_session_error(const QString text, const QString info_text)
 535 {
 536         QMessageBox msg(this);
 537         msg.setText(text);
 538         msg.setInformativeText(info_text);
 539         msg.setStandardButtons(QMessageBox::Ok);
 540         msg.setIcon(QMessageBox::Warning);
 541         msg.exec();
 542 }
 543
 544 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 545         Session *session)
 546 {
 547         // We get a pointer and need a reference
 548         for (std::shared_ptr<Session> s : sessions_)
 549                 if (s.get() == session)
 550                         add_view(title, type, *s);
 551 }
 552
 553 void MainWindow::on_focus_changed()
 554 {
 555         shared_ptr<views::ViewBase> view = get_active_view();
 556
 557         if (view) {
 558                 for (shared_ptr<Session> session : sessions_) {
 559                         if (session->has_view(view)) {
 560                                 if (session != last_focused_session_) {
 561                                         // Activate correct tab if necessary
 562                                         shared_ptr<Session> tab_session = get_tab_session(
 563                                                 session_selector_.currentIndex());
 564                                         if (tab_session != session)
 565                                                 session_selector_.setCurrentWidget(
 566                                                         session_windows_.at(session));
 567
 568                                         on_focused_session_changed(session);
 569                                 }
 570
 571                                 break;
 572                         }
 573                 }
 574         }
 575
 576         if (sessions_.empty())
 577                 setWindowTitle(WindowTitle);
 578 }
 579
 580 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 581 {
 582         last_focused_session_ = session;
 583
 584         setWindowTitle(session->name() + " - " + WindowTitle);
 585
 586         // Update the state of the run/stop button, too
 587         on_capture_state_changed(session.get());
 588 }
 589
 590 void MainWindow::on_new_session_clicked()
 591 {
 592         add_session();
 593 }
 594
 595 void MainWindow::on_run_stop_clicked()
 596 {
 597         shared_ptr<Session> session = last_focused_session_;
 598
 599         if (!session)
 600                 return;
 601
 602         switch (session->get_capture_state()) {
 603         case Session::Stopped:
 604                 session->start_capture([&](QString message) {
 605                         session_error("Capture failed", message); });
 606                 break;
 607         case Session::AwaitingTrigger:
 608         case Session::Running:
 609                 session->stop_capture();
 610                 break;
 611         }
 612 }
 613
 614 void MainWindow::on_session_name_changed()
 615 {
 616         // Update the corresponding dock widget's name(s)
 617         Session *session = qobject_cast<Session*>(QObject::sender());
 618         assert(session);
 619
 620         for (shared_ptr<views::ViewBase> view : session->views()) {
 621                 // Get the dock that contains the view
 622                 for (auto entry : view_docks_)
 623                         if (entry.second == view) {
 624                                 entry.first->setObjectName(session->name());
 625                                 entry.first->setWindowTitle(session->name());
 626                         }
 627         }
 628
 629         // Update the tab widget by finding the main window and the tab from that
 630         for (auto entry : session_windows_)
 631                 if (entry.first.get() == session) {
 632                         QMainWindow *window = entry.second;
 633                         const int index = session_selector_.indexOf(window);
 634                         session_selector_.setTabText(index, session->name());
 635                 }
 636
 637         // Refresh window title if the affected session has focus
 638         if (session == last_focused_session_.get())
 639                 setWindowTitle(session->name() + " - " + WindowTitle);
 640 }
 641
 642 void MainWindow::on_capture_state_changed(QObject *obj)
 643 {
 644         Session *caller = qobject_cast<Session*>(obj);
 645
 646         // Ignore if caller is not the currently focused session
 647         // unless there is only one session
 648         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 649                 return;
 650
 651         int state = caller->get_capture_state();
 652
 653         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 654         run_stop_button_->setIcon(*icons[state]);
 655         run_stop_button_->setText((state == pv::Session::Stopped) ?
 656                 tr("Run") : tr("Stop"));
 657 }
 658
 659 void MainWindow::on_new_view(Session *session)
 660 {
 661         // We get a pointer and need a reference
 662         for (std::shared_ptr<Session> s : sessions_)
 663                 if (s.get() == session)
 664                         add_view(session->name(), views::ViewTypeTrace, *s);
 665 }
 666
 667 void MainWindow::on_view_close_clicked()
 668 {
 669         // Find the dock widget that contains the close button that was clicked
 670         QObject *w = QObject::sender();
 671         QDockWidget *dock = 0;
 672
 673         while (w) {
 674             dock = qobject_cast<QDockWidget*>(w);
 675             if (dock)
 676                 break;
 677             w = w->parent();
 678         }
 679
 680         // Get the view contained in the dock widget
 681         shared_ptr<views::ViewBase> view;
 682
 683         for (auto entry : view_docks_)
 684                 if (entry.first == dock)
 685                         view = entry.second;
 686
 687         // Deregister the view
 688         for (shared_ptr<Session> session : sessions_) {
 689                 if (!session->has_view(view))
 690                         continue;
 691
 692                 // Also destroy the entire session if its main view is closing...
 693                 if (view == session->main_view()) {
 694                         // ...but only if data is saved or the user confirms closing
 695                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 696                                 tr("This session contains unsaved data. Close it anyway?"),
 697                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 698                                 remove_session(session);
 699                         break;
 700                 } else
 701                         // All other views can be closed at any time as no data will be lost
 702                         remove_view(view);
 703         }
 704 }
 705
 706 void MainWindow::on_tab_changed(int index)
 707 {
 708         shared_ptr<Session> session = get_tab_session(index);
 709
 710         if (session)
 711                 on_focused_session_changed(session);
 712 }
 713
 714 void MainWindow::on_tab_close_requested(int index)
 715 {
 716         shared_ptr<Session> session = get_tab_session(index);
 717
 718         assert(session);
 719
 720         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 721                 tr("This session contains unsaved data. Close it anyway?"),
 722                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 723                 remove_session(session);
 724 }
 725
 726 void MainWindow::on_actionViewStickyScrolling_triggered()
 727 {
 728         shared_ptr<views::ViewBase> viewbase = get_active_view();
 729         views::TraceView::View* view =
 730                 qobject_cast<views::TraceView::View*>(viewbase.get());
 731         if (view)
 732                 view->enable_sticky_scrolling(action_view_sticky_scrolling_->isChecked());
 733 }
 734
 735 void MainWindow::on_actionViewColouredBg_triggered()
 736 {
 737         shared_ptr<views::ViewBase> viewbase = get_active_view();
 738         views::TraceView::View* view =
 739                         qobject_cast<views::TraceView::View*>(viewbase.get());
 740         if (view)
 741                 view->enable_coloured_bg(action_view_coloured_bg_->isChecked());
 742 }
 743
 744 void MainWindow::on_actionAbout_triggered()
 745 {
 746         dialogs::About dlg(device_manager_.context(), this);
 747         dlg.exec();
 748 }
 749
 750 void MainWindow::on_close_current_tab()
 751 {
 752         int tab = session_selector_.currentIndex();
 753
 754         on_tab_close_requested(tab);
 755 }
 756
 757 } // namespace pv