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 <QDebug>
  34 #include <QDockWidget>
  35 #include <QHBoxLayout>
  36 #include <QMessageBox>
  37 #include <QSettings>
  38 #include <QShortcut>
  39 #include <QWidget>
  40
  41 #include "mainwindow.hpp"
  42
  43 #include "devicemanager.hpp"
  44 #include "devices/hardwaredevice.hpp"
  45 #include "dialogs/settings.hpp"
  46 #include "globalsettings.hpp"
  47 #include "toolbars/mainbar.hpp"
  48 #include "util.hpp"
  49 #include "views/trace/view.hpp"
  50 #include "views/trace/standardbar.hpp"
  51
  52 #ifdef ENABLE_DECODE
  53 #include "subwindows/decoder_selector/subwindow.hpp"
  54 #include "views/decoder_output/view.hpp"
  55 #endif
  56
  57 #include <libsigrokcxx/libsigrokcxx.hpp>
  58
  59 using std::dynamic_pointer_cast;
  60 using std::make_shared;
  61 using std::shared_ptr;
  62 using std::string;
  63
  64 namespace pv {
  65
  66 using toolbars::MainBar;
  67
  68 const QString MainWindow::WindowTitle = tr("PulseView");
  69
  70 MainWindow::MainWindow(DeviceManager &device_manager, QWidget *parent) :
  71         QMainWindow(parent),
  72         device_manager_(device_manager),
  73         session_selector_(this),
  74         session_state_mapper_(this),
  75         icon_red_(":/icons/status-red.svg"),
  76         icon_green_(":/icons/status-green.svg"),
  77         icon_grey_(":/icons/status-grey.svg")
  78 {
  79         setup_ui();
  80         restore_ui_settings();
  81 }
  82
  83 MainWindow::~MainWindow()
  84 {
  85         // Make sure we no longer hold any shared pointers to widgets after the
  86         // destructor finishes (goes for sessions and sub windows alike)
  87
  88         while (!sessions_.empty())
  89                 remove_session(sessions_.front());
  90
  91         sub_windows_.clear();
  92 }
  93
  94 void MainWindow::show_session_error(const QString text, const QString info_text)
  95 {
  96         // TODO Emulate noquote()
  97         qDebug() << "Notifying user of session error:" << info_text;
  98
  99         QMessageBox msg;
 100         msg.setText(text + "\n\n" + info_text);
 101         msg.setStandardButtons(QMessageBox::Ok);
 102         msg.setIcon(QMessageBox::Warning);
 103         msg.exec();
 104 }
 105
 106 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 107 {
 108         // If there's only one view, use it...
 109         if (view_docks_.size() == 1)
 110                 return view_docks_.begin()->second;
 111
 112         // ...otherwise find the dock widget the widget with focus is contained in
 113         QObject *w = QApplication::focusWidget();
 114         QDockWidget *dock = nullptr;
 115
 116         while (w) {
 117                 dock = qobject_cast<QDockWidget*>(w);
 118                 if (dock)
 119                         break;
 120                 w = w->parent();
 121         }
 122
 123         // Get the view contained in the dock widget
 124         for (auto& entry : view_docks_)
 125                 if (entry.first == dock)
 126                         return entry.second;
 127
 128         return nullptr;
 129 }
 130
 131 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 132         views::ViewType type, Session &session)
 133 {
 134         GlobalSettings settings;
 135         shared_ptr<views::ViewBase> v;
 136
 137         QMainWindow *main_window = nullptr;
 138         for (auto& entry : session_windows_)
 139                 if (entry.first.get() == &session)
 140                         main_window = entry.second;
 141
 142         assert(main_window);
 143
 144         shared_ptr<MainBar> main_bar = session.main_bar();
 145
 146         QDockWidget* dock = new QDockWidget(title, main_window);
 147         dock->setObjectName(title);
 148         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 149
 150         // Insert a QMainWindow into the dock widget to allow for a tool bar
 151         QMainWindow *dock_main = new QMainWindow(dock);
 152         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 153
 154         if (type == views::ViewTypeTrace)
 155                 // This view will be the main view if there's no main bar yet
 156                 v = make_shared<views::trace::View>(session,
 157                         (main_bar ? false : true), dock_main);
 158 #ifdef ENABLE_DECODE
 159         if (type == views::ViewTypeDecoderOutput)
 160                 v = make_shared<views::decoder_output::View>(session, false, dock_main);
 161 #endif
 162
 163         if (!v)
 164                 return nullptr;
 165
 166         view_docks_[dock] = v;
 167         session.register_view(v);
 168
 169         dock_main->setCentralWidget(v.get());
 170         dock->setWidget(dock_main);
 171
 172         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 173         dock->setFeatures(QDockWidget::DockWidgetMovable |
 174                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 175
 176         QAbstractButton *close_btn =
 177                 dock->findChildren<QAbstractButton*>("qt_dockwidget_closebutton")  // clazy:exclude=detaching-temporary
 178                         .front();
 179
 180         connect(close_btn, SIGNAL(clicked(bool)),
 181                 this, SLOT(on_view_close_clicked()));
 182
 183         connect(&session, SIGNAL(trigger_event(int, util::Timestamp)),
 184                 qobject_cast<views::ViewBase*>(v.get()),
 185                 SLOT(trigger_event(int, util::Timestamp)));
 186
 187         if (type == views::ViewTypeTrace) {
 188                 views::trace::View *tv =
 189                         qobject_cast<views::trace::View*>(v.get());
 190
 191                 if (!main_bar) {
 192                         /* Initial view, create the main bar */
 193                         main_bar = make_shared<MainBar>(session, this, tv);
 194                         dock_main->addToolBar(main_bar.get());
 195                         session.set_main_bar(main_bar);
 196
 197                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 198                                 this, SLOT(on_new_view(Session*)));
 199                         connect(main_bar.get(), SIGNAL(show_decoder_selector(Session*)),
 200                                 this, SLOT(on_show_decoder_selector(Session*)));
 201
 202                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 203
 204                         /* For the main view we need to prevent the dock widget from
 205                          * closing itself when its close button is clicked. This is
 206                          * so we can confirm with the user first. Regular views don't
 207                          * need this */
 208                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 209                 } else {
 210                         /* Additional view, create a standard bar */
 211                         pv::views::trace::StandardBar *standard_bar =
 212                                 new pv::views::trace::StandardBar(session, this, tv);
 213                         dock_main->addToolBar(standard_bar);
 214
 215                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 216                 }
 217         }
 218
 219         return v;
 220 }
 221
 222 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 223 {
 224         for (shared_ptr<Session> session : sessions_) {
 225                 if (!session->has_view(view))
 226                         continue;
 227
 228                 // Find the dock the view is contained in and remove it
 229                 for (auto& entry : view_docks_)
 230                         if (entry.second == view) {
 231                                 // Remove the view from the session
 232                                 session->deregister_view(view);
 233
 234                                 // Remove the view from its parent; otherwise, Qt will
 235                                 // call deleteLater() on it, which causes a double free
 236                                 // since the shared_ptr in view_docks_ doesn't know
 237                                 // that Qt keeps a pointer to the view around
 238                                 view->setParent(nullptr);
 239
 240                                 // Delete the view's dock widget and all widgets inside it
 241                                 entry.first->deleteLater();
 242
 243                                 // Remove the dock widget from the list and stop iterating
 244                                 view_docks_.erase(entry.first);
 245                                 break;
 246                         }
 247         }
 248 }
 249
 250 shared_ptr<subwindows::SubWindowBase> MainWindow::add_subwindow(
 251         subwindows::SubWindowType type, Session &session)
 252 {
 253         GlobalSettings settings;
 254         shared_ptr<subwindows::SubWindowBase> v;
 255
 256         QMainWindow *main_window = nullptr;
 257         for (auto& entry : session_windows_)
 258                 if (entry.first.get() == &session)
 259                         main_window = entry.second;
 260
 261         assert(main_window);
 262
 263         QString title = "";
 264
 265         switch (type) {
 266 #ifdef ENABLE_DECODE
 267                 case subwindows::SubWindowTypeDecoderSelector:
 268                         title = tr("Decoder Selector");
 269                         break;
 270 #endif
 271                 default:
 272                         break;
 273         }
 274
 275         QDockWidget* dock = new QDockWidget(title, main_window);
 276         dock->setObjectName(title);
 277         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 278
 279         // Insert a QMainWindow into the dock widget to allow for a tool bar
 280         QMainWindow *dock_main = new QMainWindow(dock);
 281         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 282
 283 #ifdef ENABLE_DECODE
 284         if (type == subwindows::SubWindowTypeDecoderSelector)
 285                 v = make_shared<subwindows::decoder_selector::SubWindow>(session, dock_main);
 286 #endif
 287
 288         if (!v)
 289                 return nullptr;
 290
 291         sub_windows_[dock] = v;
 292         dock_main->setCentralWidget(v.get());
 293         dock->setWidget(dock_main);
 294
 295         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 296         dock->setFeatures(QDockWidget::DockWidgetMovable |
 297                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 298
 299         QAbstractButton *close_btn =
 300                 dock->findChildren<QAbstractButton*>  // clazy:exclude=detaching-temporary
 301                         ("qt_dockwidget_closebutton").front();
 302
 303         connect(close_btn, SIGNAL(clicked(bool)),
 304                 this, SLOT(on_sub_window_close_clicked()));
 305
 306         if (v->has_toolbar())
 307                 dock_main->addToolBar(v->create_toolbar(dock_main));
 308
 309         if (v->minimum_width() > 0)
 310                 dock->setMinimumSize(v->minimum_width(), 0);
 311
 312         return v;
 313 }
 314
 315 shared_ptr<Session> MainWindow::add_session()
 316 {
 317         static int last_session_id = 1;
 318         QString name = tr("Session %1").arg(last_session_id++);
 319
 320         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 321
 322         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 323                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 324         connect(session.get(), SIGNAL(name_changed()),
 325                 this, SLOT(on_session_name_changed()));
 326         session_state_mapper_.setMapping(session.get(), session.get());
 327         connect(session.get(), SIGNAL(capture_state_changed(int)),
 328                 &session_state_mapper_, SLOT(map()));
 329
 330         sessions_.push_back(session);
 331
 332         QMainWindow *window = new QMainWindow();
 333         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 334         session_windows_[session] = window;
 335
 336         int index = session_selector_.addTab(window, name);
 337         session_selector_.setCurrentIndex(index);
 338         last_focused_session_ = session;
 339
 340         window->setDockNestingEnabled(true);
 341
 342         shared_ptr<views::ViewBase> main_view =
 343                 add_view(name, views::ViewTypeTrace, *session);
 344
 345         return session;
 346 }
 347
 348 void MainWindow::remove_session(shared_ptr<Session> session)
 349 {
 350         // Determine the height of the button before it collapses
 351         int h = new_session_button_->height();
 352
 353         // Stop capture while the session still exists so that the UI can be
 354         // updated in case we're currently running. If so, this will schedule a
 355         // call to our on_capture_state_changed() slot for the next run of the
 356         // event loop. We need to have this executed immediately or else it will
 357         // be dismissed since the session object will be deleted by the time we
 358         // leave this method and the event loop gets a chance to run again.
 359         session->stop_capture();
 360         QApplication::processEvents();
 361
 362         for (const shared_ptr<views::ViewBase>& view : session->views())
 363                 remove_view(view);
 364
 365         QMainWindow *window = session_windows_.at(session);
 366         session_selector_.removeTab(session_selector_.indexOf(window));
 367
 368         session_windows_.erase(session);
 369
 370         if (last_focused_session_ == session)
 371                 last_focused_session_.reset();
 372
 373         // Remove the session from our list of sessions (which also destroys it)
 374         sessions_.remove_if([&](shared_ptr<Session> s) {
 375                 return s == session; });
 376
 377         if (sessions_.empty()) {
 378                 // When there are no more tabs, the height of the QTabWidget
 379                 // drops to zero. We must prevent this to keep the static
 380                 // widgets visible
 381                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())  // clazy:exclude=range-loop
 382                         w->setMinimumHeight(h);
 383
 384                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 385                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 386                 session_selector_.setMinimumHeight(h + 2 * margin);
 387
 388                 // Update the window title if there is no view left to
 389                 // generate focus change events
 390                 setWindowTitle(WindowTitle);
 391         }
 392 }
 393
 394 void MainWindow::add_session_with_file(string open_file_name,
 395         string open_file_format, string open_setup_file_name)
 396 {
 397         shared_ptr<Session> session = add_session();
 398         session->load_init_file(open_file_name, open_file_format, open_setup_file_name);
 399 }
 400
 401 void MainWindow::add_default_session()
 402 {
 403         // Only add the default session if there would be no session otherwise
 404         if (sessions_.size() > 0)
 405                 return;
 406
 407         shared_ptr<Session> session = add_session();
 408
 409         // Check the list of available devices. Prefer the one that was
 410         // found with user supplied scan specs (if applicable). Then try
 411         // one of the auto detected devices that are not the demo device.
 412         // Pick demo in the absence of "genuine" hardware devices.
 413         shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
 414         for (const shared_ptr<devices::HardwareDevice>& dev : device_manager_.devices()) {
 415                 if (dev == device_manager_.user_spec_device()) {
 416                         user_device = dev;
 417                 } else if (dev->hardware_device()->driver()->name() == "demo") {
 418                         demo_device = dev;
 419                 } else {
 420                         other_device = dev;
 421                 }
 422         }
 423         if (user_device)
 424                 session->select_device(user_device);
 425         else if (other_device)
 426                 session->select_device(other_device);
 427         else
 428                 session->select_device(demo_device);
 429 }
 430
 431 void MainWindow::save_sessions()
 432 {
 433         QSettings settings;
 434         int id = 0;
 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_sessions()
 458 {
 459         QSettings settings;
 460         int i, session_count;
 461
 462         session_count = settings.value("sessions", 0).toInt();
 463
 464         for (i = 0; i < session_count; i++) {
 465                 settings.beginGroup("Session" + QString::number(i));
 466                 shared_ptr<Session> session = add_session();
 467                 session->restore_settings(settings);
 468                 settings.endGroup();
 469         }
 470 }
 471
 472 void MainWindow::setup_ui()
 473 {
 474         setObjectName(QString::fromUtf8("MainWindow"));
 475
 476         setCentralWidget(&session_selector_);
 477
 478         // Set the window icon
 479         QIcon icon;
 480         icon.addFile(QString(":/icons/pulseview.png"));
 481         setWindowIcon(icon);
 482
 483         // Set up keyboard shortcuts that affect all views at once
 484         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 485         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 486
 487         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 488         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 489
 490         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 491         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 492
 493         view_colored_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_colored_bg_shortcut()));
 494         view_colored_bg_shortcut_->setAutoRepeat(false);
 495
 496         // Set up the tab area
 497         new_session_button_ = new QToolButton();
 498         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 499                 QIcon(":/icons/document-new.png")));
 500         new_session_button_->setToolTip(tr("Create New Session"));
 501         new_session_button_->setAutoRaise(true);
 502
 503         run_stop_button_ = new QToolButton();
 504         run_stop_button_->setAutoRaise(true);
 505         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 506         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 507
 508         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 509         run_stop_shortcut_->setAutoRepeat(false);
 510
 511         settings_button_ = new QToolButton();
 512         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 513                 QIcon(":/icons/preferences-system.png")));
 514         settings_button_->setToolTip(tr("Settings"));
 515         settings_button_->setAutoRaise(true);
 516
 517         QFrame *separator1 = new QFrame();
 518         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 519         QFrame *separator2 = new QFrame();
 520         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 521
 522         QHBoxLayout* layout = new QHBoxLayout();
 523         layout->setContentsMargins(2, 2, 2, 2);
 524         layout->addWidget(new_session_button_);
 525         layout->addWidget(separator1);
 526         layout->addWidget(run_stop_button_);
 527         layout->addWidget(separator2);
 528         layout->addWidget(settings_button_);
 529
 530         static_tab_widget_ = new QWidget();
 531         static_tab_widget_->setLayout(layout);
 532
 533         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 534         session_selector_.setTabsClosable(true);
 535
 536         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 537         close_application_shortcut_->setAutoRepeat(false);
 538
 539         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 540
 541         connect(new_session_button_, SIGNAL(clicked(bool)),
 542                 this, SLOT(on_new_session_clicked()));
 543         connect(run_stop_button_, SIGNAL(clicked(bool)),
 544                 this, SLOT(on_run_stop_clicked()));
 545         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 546                 this, SLOT(on_capture_state_changed(QObject*)));
 547         connect(settings_button_, SIGNAL(clicked(bool)),
 548                 this, SLOT(on_settings_clicked()));
 549
 550         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 551                 this, SLOT(on_tab_close_requested(int)));
 552         connect(&session_selector_, SIGNAL(currentChanged(int)),
 553                 this, SLOT(on_tab_changed(int)));
 554
 555
 556         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 557                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 558                 this, SLOT(on_focus_changed()));
 559 }
 560
 561 void MainWindow::save_ui_settings()
 562 {
 563         QSettings settings;
 564
 565         settings.beginGroup("MainWindow");
 566         settings.setValue("state", saveState());
 567         settings.setValue("geometry", saveGeometry());
 568         settings.endGroup();
 569 }
 570
 571 void MainWindow::restore_ui_settings()
 572 {
 573         QSettings settings;
 574
 575         settings.beginGroup("MainWindow");
 576
 577         if (settings.contains("geometry")) {
 578                 restoreGeometry(settings.value("geometry").toByteArray());
 579                 restoreState(settings.value("state").toByteArray());
 580         } else
 581                 resize(1000, 720);
 582
 583         settings.endGroup();
 584 }
 585
 586 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 587 {
 588         // Find the session that belongs to the tab's main window
 589         for (auto& entry : session_windows_)
 590                 if (entry.second == session_selector_.widget(index))
 591                         return entry.first;
 592
 593         return nullptr;
 594 }
 595
 596 void MainWindow::closeEvent(QCloseEvent *event)
 597 {
 598         bool data_saved = true;
 599
 600         for (auto& entry : session_windows_)
 601                 if (!entry.first->data_saved())
 602                         data_saved = false;
 603
 604         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 605                 tr("There is unsaved data. Close anyway?"),
 606                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 607                 event->ignore();
 608         } else {
 609                 save_ui_settings();
 610                 save_sessions();
 611                 event->accept();
 612         }
 613 }
 614
 615 QMenu* MainWindow::createPopupMenu()
 616 {
 617         return nullptr;
 618 }
 619
 620 bool MainWindow::restoreState(const QByteArray &state, int version)
 621 {
 622         (void)state;
 623         (void)version;
 624
 625         // Do nothing. We don't want Qt to handle this, or else it
 626         // will try to restore all the dock widgets and create havoc.
 627
 628         return false;
 629 }
 630
 631 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 632         Session *session)
 633 {
 634         // We get a pointer and need a reference
 635         for (shared_ptr<Session>& s : sessions_)
 636                 if (s.get() == session)
 637                         add_view(title, type, *s);
 638 }
 639
 640 void MainWindow::on_focus_changed()
 641 {
 642         shared_ptr<views::ViewBase> view = get_active_view();
 643
 644         if (view) {
 645                 for (shared_ptr<Session> session : sessions_) {
 646                         if (session->has_view(view)) {
 647                                 if (session != last_focused_session_) {
 648                                         // Activate correct tab if necessary
 649                                         shared_ptr<Session> tab_session = get_tab_session(
 650                                                 session_selector_.currentIndex());
 651                                         if (tab_session != session)
 652                                                 session_selector_.setCurrentWidget(
 653                                                         session_windows_.at(session));
 654
 655                                         on_focused_session_changed(session);
 656                                 }
 657
 658                                 break;
 659                         }
 660                 }
 661         }
 662
 663         if (sessions_.empty())
 664                 setWindowTitle(WindowTitle);
 665 }
 666
 667 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 668 {
 669         last_focused_session_ = session;
 670
 671         setWindowTitle(session->name() + " - " + WindowTitle);
 672
 673         // Update the state of the run/stop button, too
 674         on_capture_state_changed(session.get());
 675 }
 676
 677 void MainWindow::on_new_session_clicked()
 678 {
 679         add_session();
 680 }
 681
 682 void MainWindow::on_run_stop_clicked()
 683 {
 684         shared_ptr<Session> session = last_focused_session_;
 685
 686         if (!session)
 687                 return;
 688
 689         switch (session->get_capture_state()) {
 690         case Session::Stopped:
 691                 session->start_capture([&](QString message) {
 692                         show_session_error("Capture failed", message); });
 693                 break;
 694         case Session::AwaitingTrigger:
 695         case Session::Running:
 696                 session->stop_capture();
 697                 break;
 698         }
 699 }
 700
 701 void MainWindow::on_settings_clicked()
 702 {
 703         dialogs::Settings dlg(device_manager_);
 704         dlg.exec();
 705 }
 706
 707 void MainWindow::on_session_name_changed()
 708 {
 709         // Update the corresponding dock widget's name(s)
 710         Session *session = qobject_cast<Session*>(QObject::sender());
 711         assert(session);
 712
 713         for (const shared_ptr<views::ViewBase>& view : session->views()) {
 714                 // Get the dock that contains the view
 715                 for (auto& entry : view_docks_)
 716                         if (entry.second == view) {
 717                                 entry.first->setObjectName(session->name());
 718                                 entry.first->setWindowTitle(session->name());
 719                         }
 720         }
 721
 722         // Update the tab widget by finding the main window and the tab from that
 723         for (auto& entry : session_windows_)
 724                 if (entry.first.get() == session) {
 725                         QMainWindow *window = entry.second;
 726                         const int index = session_selector_.indexOf(window);
 727                         session_selector_.setTabText(index, session->name());
 728                 }
 729
 730         // Refresh window title if the affected session has focus
 731         if (session == last_focused_session_.get())
 732                 setWindowTitle(session->name() + " - " + WindowTitle);
 733 }
 734
 735 void MainWindow::on_capture_state_changed(QObject *obj)
 736 {
 737         Session *caller = qobject_cast<Session*>(obj);
 738
 739         // Ignore if caller is not the currently focused session
 740         // unless there is only one session
 741         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 742                 return;
 743
 744         int state = caller->get_capture_state();
 745
 746         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 747         run_stop_button_->setIcon(*icons[state]);
 748         run_stop_button_->setText((state == pv::Session::Stopped) ?
 749                 tr("Run") : tr("Stop"));
 750 }
 751
 752 void MainWindow::on_new_view(Session *session)
 753 {
 754         // We get a pointer and need a reference
 755         for (shared_ptr<Session>& s : sessions_)
 756                 if (s.get() == session)
 757                         add_view(session->name(), views::ViewTypeTrace, *s);
 758 }
 759
 760 void MainWindow::on_view_close_clicked()
 761 {
 762         // Find the dock widget that contains the close button that was clicked
 763         QObject *w = QObject::sender();
 764         QDockWidget *dock = nullptr;
 765
 766         while (w) {
 767             dock = qobject_cast<QDockWidget*>(w);
 768             if (dock)
 769                 break;
 770             w = w->parent();
 771         }
 772
 773         // Get the view contained in the dock widget
 774         shared_ptr<views::ViewBase> view;
 775
 776         for (auto& entry : view_docks_)
 777                 if (entry.first == dock)
 778                         view = entry.second;
 779
 780         // Deregister the view
 781         for (shared_ptr<Session> session : sessions_) {
 782                 if (!session->has_view(view))
 783                         continue;
 784
 785                 // Also destroy the entire session if its main view is closing...
 786                 if (view == session->main_view()) {
 787                         // ...but only if data is saved or the user confirms closing
 788                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 789                                 tr("This session contains unsaved data. Close it anyway?"),
 790                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 791                                 remove_session(session);
 792                         break;
 793                 } else
 794                         // All other views can be closed at any time as no data will be lost
 795                         remove_view(view);
 796         }
 797 }
 798
 799 void MainWindow::on_tab_changed(int index)
 800 {
 801         shared_ptr<Session> session = get_tab_session(index);
 802
 803         if (session)
 804                 on_focused_session_changed(session);
 805 }
 806
 807 void MainWindow::on_tab_close_requested(int index)
 808 {
 809         shared_ptr<Session> session = get_tab_session(index);
 810
 811         if (!session)
 812                 return;
 813
 814         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 815                 tr("This session contains unsaved data. Close it anyway?"),
 816                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 817                 remove_session(session);
 818 }
 819
 820 void MainWindow::on_show_decoder_selector(Session *session)
 821 {
 822 #ifdef ENABLE_DECODE
 823         // Close dock widget if it's already showing and return
 824         for (auto& entry : sub_windows_) {
 825                 QDockWidget* dock = entry.first;
 826                 shared_ptr<subwindows::SubWindowBase> decoder_selector =
 827                         dynamic_pointer_cast<subwindows::decoder_selector::SubWindow>(entry.second);
 828
 829                 if (decoder_selector && (&decoder_selector->session() == session)) {
 830                         sub_windows_.erase(dock);
 831                         dock->close();
 832                         return;
 833                 }
 834         }
 835
 836         // We get a pointer and need a reference
 837         for (shared_ptr<Session>& s : sessions_)
 838                 if (s.get() == session)
 839                         add_subwindow(subwindows::SubWindowTypeDecoderSelector, *s);
 840 #endif
 841 }
 842
 843 void MainWindow::on_sub_window_close_clicked()
 844 {
 845         // Find the dock widget that contains the close button that was clicked
 846         QObject *w = QObject::sender();
 847         QDockWidget *dock = nullptr;
 848
 849         while (w) {
 850             dock = qobject_cast<QDockWidget*>(w);
 851             if (dock)
 852                 break;
 853             w = w->parent();
 854         }
 855
 856         sub_windows_.erase(dock);
 857         dock->close();
 858 }
 859
 860 void MainWindow::on_view_colored_bg_shortcut()
 861 {
 862         GlobalSettings settings;
 863
 864         bool state = settings.value(GlobalSettings::Key_View_ColoredBG).toBool();
 865         settings.setValue(GlobalSettings::Key_View_ColoredBG, !state);
 866 }
 867
 868 void MainWindow::on_view_sticky_scrolling_shortcut()
 869 {
 870         GlobalSettings settings;
 871
 872         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 873         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 874 }
 875
 876 void MainWindow::on_view_show_sampling_points_shortcut()
 877 {
 878         GlobalSettings settings;
 879
 880         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 881         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 882 }
 883
 884 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 885 {
 886         GlobalSettings settings;
 887
 888         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 889         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 890 }
 891
 892 void MainWindow::on_close_current_tab()
 893 {
 894         int tab = session_selector_.currentIndex();
 895
 896         on_tab_close_requested(tab);
 897 }
 898
 899 } // namespace pv