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(views::ViewType type,
 132         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         // Only use the view type in the name if it's not the main view
 147         QString title;
 148         if (main_bar)
 149                 title = QString("%1 (%2)").arg(session.name()).arg(views::ViewTypeNames[type]);
 150         else
 151                 title = session.name();
 152
 153         QDockWidget* dock = new QDockWidget(title, main_window);
 154         dock->setObjectName(title);
 155         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 156
 157         // Insert a QMainWindow into the dock widget to allow for a tool bar
 158         QMainWindow *dock_main = new QMainWindow(dock);
 159         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 160
 161         if (type == views::ViewTypeTrace)
 162                 // This view will be the main view if there's no main bar yet
 163                 v = make_shared<views::trace::View>(session, (main_bar ? false : true), dock_main);
 164 #ifdef ENABLE_DECODE
 165         if (type == views::ViewTypeDecoderOutput)
 166                 v = make_shared<views::decoder_output::View>(session, false, dock_main);
 167 #endif
 168
 169         if (!v)
 170                 return nullptr;
 171
 172         view_docks_[dock] = v;
 173         session.register_view(v);
 174
 175         dock_main->setCentralWidget(v.get());
 176         dock->setWidget(dock_main);
 177
 178         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 179         dock->setFeatures(QDockWidget::DockWidgetMovable |
 180                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 181
 182         QAbstractButton *close_btn =
 183                 dock->findChildren<QAbstractButton*>("qt_dockwidget_closebutton")  // clazy:exclude=detaching-temporary
 184                         .front();
 185
 186         connect(close_btn, SIGNAL(clicked(bool)),
 187                 this, SLOT(on_view_close_clicked()));
 188
 189         connect(&session, SIGNAL(trigger_event(int, util::Timestamp)),
 190                 qobject_cast<views::ViewBase*>(v.get()),
 191                 SLOT(trigger_event(int, util::Timestamp)));
 192
 193         if (type == views::ViewTypeTrace) {
 194                 views::trace::View *tv =
 195                         qobject_cast<views::trace::View*>(v.get());
 196
 197                 if (!main_bar) {
 198                         /* Initial view, create the main bar */
 199                         main_bar = make_shared<MainBar>(session, this, tv);
 200                         dock_main->addToolBar(main_bar.get());
 201                         session.set_main_bar(main_bar);
 202
 203                         connect(main_bar.get(), SIGNAL(new_view(Session*, int)),
 204                                 this, SLOT(on_new_view(Session*, int)));
 205                         connect(main_bar.get(), SIGNAL(show_decoder_selector(Session*)),
 206                                 this, SLOT(on_show_decoder_selector(Session*)));
 207
 208                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 209
 210                         /* For the main view we need to prevent the dock widget from
 211                          * closing itself when its close button is clicked. This is
 212                          * so we can confirm with the user first. Regular views don't
 213                          * need this */
 214                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 215                 } else {
 216                         /* Additional view, create a standard bar */
 217                         pv::views::trace::StandardBar *standard_bar =
 218                                 new pv::views::trace::StandardBar(session, this, tv);
 219                         dock_main->addToolBar(standard_bar);
 220
 221                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 222                 }
 223         }
 224
 225         return v;
 226 }
 227
 228 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 229 {
 230         for (shared_ptr<Session> session : sessions_) {
 231                 if (!session->has_view(view))
 232                         continue;
 233
 234                 // Find the dock the view is contained in and remove it
 235                 for (auto& entry : view_docks_)
 236                         if (entry.second == view) {
 237                                 // Remove the view from the session
 238                                 session->deregister_view(view);
 239
 240                                 // Remove the view from its parent; otherwise, Qt will
 241                                 // call deleteLater() on it, which causes a double free
 242                                 // since the shared_ptr in view_docks_ doesn't know
 243                                 // that Qt keeps a pointer to the view around
 244                                 view->setParent(nullptr);
 245
 246                                 // Delete the view's dock widget and all widgets inside it
 247                                 entry.first->deleteLater();
 248
 249                                 // Remove the dock widget from the list and stop iterating
 250                                 view_docks_.erase(entry.first);
 251                                 break;
 252                         }
 253         }
 254 }
 255
 256 shared_ptr<subwindows::SubWindowBase> MainWindow::add_subwindow(
 257         subwindows::SubWindowType type, Session &session)
 258 {
 259         GlobalSettings settings;
 260         shared_ptr<subwindows::SubWindowBase> v;
 261
 262         QMainWindow *main_window = nullptr;
 263         for (auto& entry : session_windows_)
 264                 if (entry.first.get() == &session)
 265                         main_window = entry.second;
 266
 267         assert(main_window);
 268
 269         QString title = "";
 270
 271         switch (type) {
 272 #ifdef ENABLE_DECODE
 273                 case subwindows::SubWindowTypeDecoderSelector:
 274                         title = tr("Decoder Selector");
 275                         break;
 276 #endif
 277                 default:
 278                         break;
 279         }
 280
 281         QDockWidget* dock = new QDockWidget(title, main_window);
 282         dock->setObjectName(title);
 283         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 284
 285         // Insert a QMainWindow into the dock widget to allow for a tool bar
 286         QMainWindow *dock_main = new QMainWindow(dock);
 287         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 288
 289 #ifdef ENABLE_DECODE
 290         if (type == subwindows::SubWindowTypeDecoderSelector)
 291                 v = make_shared<subwindows::decoder_selector::SubWindow>(session, dock_main);
 292 #endif
 293
 294         if (!v)
 295                 return nullptr;
 296
 297         sub_windows_[dock] = v;
 298         dock_main->setCentralWidget(v.get());
 299         dock->setWidget(dock_main);
 300
 301         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 302         dock->setFeatures(QDockWidget::DockWidgetMovable |
 303                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 304
 305         QAbstractButton *close_btn =
 306                 dock->findChildren<QAbstractButton*>  // clazy:exclude=detaching-temporary
 307                         ("qt_dockwidget_closebutton").front();
 308
 309         connect(close_btn, SIGNAL(clicked(bool)),
 310                 this, SLOT(on_sub_window_close_clicked()));
 311
 312         if (v->has_toolbar())
 313                 dock_main->addToolBar(v->create_toolbar(dock_main));
 314
 315         if (v->minimum_width() > 0)
 316                 dock->setMinimumSize(v->minimum_width(), 0);
 317
 318         return v;
 319 }
 320
 321 shared_ptr<Session> MainWindow::add_session()
 322 {
 323         static int last_session_id = 1;
 324         QString name = tr("Session %1").arg(last_session_id++);
 325
 326         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 327
 328         connect(session.get(), SIGNAL(add_view(views::ViewType, Session*)),
 329                 this, SLOT(on_add_view(views::ViewType, Session*)));
 330         connect(session.get(), SIGNAL(name_changed()),
 331                 this, SLOT(on_session_name_changed()));
 332         session_state_mapper_.setMapping(session.get(), session.get());
 333         connect(session.get(), SIGNAL(capture_state_changed(int)),
 334                 &session_state_mapper_, SLOT(map()));
 335
 336         sessions_.push_back(session);
 337
 338         QMainWindow *window = new QMainWindow();
 339         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 340         session_windows_[session] = window;
 341
 342         int index = session_selector_.addTab(window, name);
 343         session_selector_.setCurrentIndex(index);
 344         last_focused_session_ = session;
 345
 346         window->setDockNestingEnabled(true);
 347
 348         shared_ptr<views::ViewBase> main_view = add_view(views::ViewTypeTrace, *session);
 349
 350         return session;
 351 }
 352
 353 void MainWindow::remove_session(shared_ptr<Session> session)
 354 {
 355         // Determine the height of the button before it collapses
 356         int h = new_session_button_->height();
 357
 358         // Stop capture while the session still exists so that the UI can be
 359         // updated in case we're currently running. If so, this will schedule a
 360         // call to our on_capture_state_changed() slot for the next run of the
 361         // event loop. We need to have this executed immediately or else it will
 362         // be dismissed since the session object will be deleted by the time we
 363         // leave this method and the event loop gets a chance to run again.
 364         session->stop_capture();
 365         QApplication::processEvents();
 366
 367         for (const shared_ptr<views::ViewBase>& view : session->views())
 368                 remove_view(view);
 369
 370         QMainWindow *window = session_windows_.at(session);
 371         session_selector_.removeTab(session_selector_.indexOf(window));
 372
 373         session_windows_.erase(session);
 374
 375         if (last_focused_session_ == session)
 376                 last_focused_session_.reset();
 377
 378         // Remove the session from our list of sessions (which also destroys it)
 379         sessions_.remove_if([&](shared_ptr<Session> s) {
 380                 return s == session; });
 381
 382         if (sessions_.empty()) {
 383                 // When there are no more tabs, the height of the QTabWidget
 384                 // drops to zero. We must prevent this to keep the static
 385                 // widgets visible
 386                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())  // clazy:exclude=range-loop
 387                         w->setMinimumHeight(h);
 388
 389                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 390                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 391                 session_selector_.setMinimumHeight(h + 2 * margin);
 392
 393                 // Update the window title if there is no view left to
 394                 // generate focus change events
 395                 setWindowTitle(WindowTitle);
 396         }
 397 }
 398
 399 void MainWindow::add_session_with_file(string open_file_name,
 400         string open_file_format, string open_setup_file_name)
 401 {
 402         shared_ptr<Session> session = add_session();
 403         session->load_init_file(open_file_name, open_file_format, open_setup_file_name);
 404 }
 405
 406 void MainWindow::add_default_session()
 407 {
 408         // Only add the default session if there would be no session otherwise
 409         if (sessions_.size() > 0)
 410                 return;
 411
 412         shared_ptr<Session> session = add_session();
 413
 414         // Check the list of available devices. Prefer the one that was
 415         // found with user supplied scan specs (if applicable). Then try
 416         // one of the auto detected devices that are not the demo device.
 417         // Pick demo in the absence of "genuine" hardware devices.
 418         shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
 419         for (const shared_ptr<devices::HardwareDevice>& dev : device_manager_.devices()) {
 420                 if (dev == device_manager_.user_spec_device()) {
 421                         user_device = dev;
 422                 } else if (dev->hardware_device()->driver()->name() == "demo") {
 423                         demo_device = dev;
 424                 } else {
 425                         other_device = dev;
 426                 }
 427         }
 428         if (user_device)
 429                 session->select_device(user_device);
 430         else if (other_device)
 431                 session->select_device(other_device);
 432         else
 433                 session->select_device(demo_device);
 434 }
 435
 436 void MainWindow::save_sessions()
 437 {
 438         QSettings settings;
 439         int id = 0;
 440
 441         for (shared_ptr<Session>& session : sessions_) {
 442                 // Ignore sessions using the demo device or no device at all
 443                 if (session->device()) {
 444                         shared_ptr<devices::HardwareDevice> device =
 445                                 dynamic_pointer_cast< devices::HardwareDevice >
 446                                 (session->device());
 447
 448                         if (device &&
 449                                 device->hardware_device()->driver()->name() == "demo")
 450                                 continue;
 451
 452                         settings.beginGroup("Session" + QString::number(id++));
 453                         settings.remove("");  // Remove all keys in this group
 454                         session->save_settings(settings);
 455                         settings.endGroup();
 456                 }
 457         }
 458
 459         settings.setValue("sessions", id);
 460 }
 461
 462 void MainWindow::restore_sessions()
 463 {
 464         QSettings settings;
 465         int i, session_count;
 466
 467         session_count = settings.value("sessions", 0).toInt();
 468
 469         for (i = 0; i < session_count; i++) {
 470                 settings.beginGroup("Session" + QString::number(i));
 471                 shared_ptr<Session> session = add_session();
 472                 session->restore_settings(settings);
 473                 settings.endGroup();
 474         }
 475 }
 476
 477 void MainWindow::setup_ui()
 478 {
 479         setObjectName(QString::fromUtf8("MainWindow"));
 480
 481         setCentralWidget(&session_selector_);
 482
 483         // Set the window icon
 484         QIcon icon;
 485         icon.addFile(QString(":/icons/pulseview.png"));
 486         setWindowIcon(icon);
 487
 488         // Set up keyboard shortcuts that affect all views at once
 489         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 490         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 491
 492         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 493         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 494
 495         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 496         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 497
 498         view_colored_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_colored_bg_shortcut()));
 499         view_colored_bg_shortcut_->setAutoRepeat(false);
 500
 501         // Set up the tab area
 502         new_session_button_ = new QToolButton();
 503         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 504                 QIcon(":/icons/document-new.png")));
 505         new_session_button_->setToolTip(tr("Create New Session"));
 506         new_session_button_->setAutoRaise(true);
 507
 508         run_stop_button_ = new QToolButton();
 509         run_stop_button_->setAutoRaise(true);
 510         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 511         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 512
 513         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 514         run_stop_shortcut_->setAutoRepeat(false);
 515
 516         settings_button_ = new QToolButton();
 517         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 518                 QIcon(":/icons/preferences-system.png")));
 519         settings_button_->setToolTip(tr("Settings"));
 520         settings_button_->setAutoRaise(true);
 521
 522         QFrame *separator1 = new QFrame();
 523         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 524         QFrame *separator2 = new QFrame();
 525         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 526
 527         QHBoxLayout* layout = new QHBoxLayout();
 528         layout->setContentsMargins(2, 2, 2, 2);
 529         layout->addWidget(new_session_button_);
 530         layout->addWidget(separator1);
 531         layout->addWidget(run_stop_button_);
 532         layout->addWidget(separator2);
 533         layout->addWidget(settings_button_);
 534
 535         static_tab_widget_ = new QWidget();
 536         static_tab_widget_->setLayout(layout);
 537
 538         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 539         session_selector_.setTabsClosable(true);
 540
 541         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 542         close_application_shortcut_->setAutoRepeat(false);
 543
 544         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 545
 546         connect(new_session_button_, SIGNAL(clicked(bool)),
 547                 this, SLOT(on_new_session_clicked()));
 548         connect(run_stop_button_, SIGNAL(clicked(bool)),
 549                 this, SLOT(on_run_stop_clicked()));
 550         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 551                 this, SLOT(on_capture_state_changed(QObject*)));
 552         connect(settings_button_, SIGNAL(clicked(bool)),
 553                 this, SLOT(on_settings_clicked()));
 554
 555         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 556                 this, SLOT(on_tab_close_requested(int)));
 557         connect(&session_selector_, SIGNAL(currentChanged(int)),
 558                 this, SLOT(on_tab_changed(int)));
 559
 560
 561         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 562                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 563                 this, SLOT(on_focus_changed()));
 564 }
 565
 566 void MainWindow::save_ui_settings()
 567 {
 568         QSettings settings;
 569
 570         settings.beginGroup("MainWindow");
 571         settings.setValue("state", saveState());
 572         settings.setValue("geometry", saveGeometry());
 573         settings.endGroup();
 574 }
 575
 576 void MainWindow::restore_ui_settings()
 577 {
 578         QSettings settings;
 579
 580         settings.beginGroup("MainWindow");
 581
 582         if (settings.contains("geometry")) {
 583                 restoreGeometry(settings.value("geometry").toByteArray());
 584                 restoreState(settings.value("state").toByteArray());
 585         } else
 586                 resize(1000, 720);
 587
 588         settings.endGroup();
 589 }
 590
 591 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 592 {
 593         // Find the session that belongs to the tab's main window
 594         for (auto& entry : session_windows_)
 595                 if (entry.second == session_selector_.widget(index))
 596                         return entry.first;
 597
 598         return nullptr;
 599 }
 600
 601 void MainWindow::closeEvent(QCloseEvent *event)
 602 {
 603         bool data_saved = true;
 604
 605         for (auto& entry : session_windows_)
 606                 if (!entry.first->data_saved())
 607                         data_saved = false;
 608
 609         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 610                 tr("There is unsaved data. Close anyway?"),
 611                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 612                 event->ignore();
 613         } else {
 614                 save_ui_settings();
 615                 save_sessions();
 616                 event->accept();
 617         }
 618 }
 619
 620 QMenu* MainWindow::createPopupMenu()
 621 {
 622         return nullptr;
 623 }
 624
 625 bool MainWindow::restoreState(const QByteArray &state, int version)
 626 {
 627         (void)state;
 628         (void)version;
 629
 630         // Do nothing. We don't want Qt to handle this, or else it
 631         // will try to restore all the dock widgets and create havoc.
 632
 633         return false;
 634 }
 635
 636 void MainWindow::on_add_view(views::ViewType type, Session *session)
 637 {
 638         // We get a pointer and need a reference
 639         for (shared_ptr<Session>& s : sessions_)
 640                 if (s.get() == session)
 641                         add_view(type, *s);
 642 }
 643
 644 void MainWindow::on_focus_changed()
 645 {
 646         shared_ptr<views::ViewBase> view = get_active_view();
 647
 648         if (view) {
 649                 for (shared_ptr<Session> session : sessions_) {
 650                         if (session->has_view(view)) {
 651                                 if (session != last_focused_session_) {
 652                                         // Activate correct tab if necessary
 653                                         shared_ptr<Session> tab_session = get_tab_session(
 654                                                 session_selector_.currentIndex());
 655                                         if (tab_session != session)
 656                                                 session_selector_.setCurrentWidget(
 657                                                         session_windows_.at(session));
 658
 659                                         on_focused_session_changed(session);
 660                                 }
 661
 662                                 break;
 663                         }
 664                 }
 665         }
 666
 667         if (sessions_.empty())
 668                 setWindowTitle(WindowTitle);
 669 }
 670
 671 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 672 {
 673         last_focused_session_ = session;
 674
 675         setWindowTitle(session->name() + " - " + WindowTitle);
 676
 677         // Update the state of the run/stop button, too
 678         on_capture_state_changed(session.get());
 679 }
 680
 681 void MainWindow::on_new_session_clicked()
 682 {
 683         add_session();
 684 }
 685
 686 void MainWindow::on_run_stop_clicked()
 687 {
 688         shared_ptr<Session> session = last_focused_session_;
 689
 690         if (!session)
 691                 return;
 692
 693         switch (session->get_capture_state()) {
 694         case Session::Stopped:
 695                 session->start_capture([&](QString message) {
 696                         show_session_error("Capture failed", message); });
 697                 break;
 698         case Session::AwaitingTrigger:
 699         case Session::Running:
 700                 session->stop_capture();
 701                 break;
 702         }
 703 }
 704
 705 void MainWindow::on_settings_clicked()
 706 {
 707         dialogs::Settings dlg(device_manager_);
 708         dlg.exec();
 709 }
 710
 711 void MainWindow::on_session_name_changed()
 712 {
 713         // Update the corresponding dock widget's name(s)
 714         Session *session = qobject_cast<Session*>(QObject::sender());
 715         assert(session);
 716
 717         for (const shared_ptr<views::ViewBase>& view : session->views()) {
 718                 // Get the dock that contains the view
 719                 for (auto& entry : view_docks_)
 720                         if (entry.second == view) {
 721                                 entry.first->setObjectName(session->name());
 722                                 entry.first->setWindowTitle(session->name());
 723                         }
 724         }
 725
 726         // Update the tab widget by finding the main window and the tab from that
 727         for (auto& entry : session_windows_)
 728                 if (entry.first.get() == session) {
 729                         QMainWindow *window = entry.second;
 730                         const int index = session_selector_.indexOf(window);
 731                         session_selector_.setTabText(index, session->name());
 732                 }
 733
 734         // Refresh window title if the affected session has focus
 735         if (session == last_focused_session_.get())
 736                 setWindowTitle(session->name() + " - " + WindowTitle);
 737 }
 738
 739 void MainWindow::on_capture_state_changed(QObject *obj)
 740 {
 741         Session *caller = qobject_cast<Session*>(obj);
 742
 743         // Ignore if caller is not the currently focused session
 744         // unless there is only one session
 745         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 746                 return;
 747
 748         int state = caller->get_capture_state();
 749
 750         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 751         run_stop_button_->setIcon(*icons[state]);
 752         run_stop_button_->setText((state == pv::Session::Stopped) ?
 753                 tr("Run") : tr("Stop"));
 754 }
 755
 756 void MainWindow::on_new_view(Session *session, int view_type)
 757 {
 758         // We get a pointer and need a reference
 759         for (shared_ptr<Session>& s : sessions_)
 760                 if (s.get() == session)
 761                         add_view((views::ViewType)view_type, *s);
 762 }
 763
 764 void MainWindow::on_view_close_clicked()
 765 {
 766         // Find the dock widget that contains the close button that was clicked
 767         QObject *w = QObject::sender();
 768         QDockWidget *dock = nullptr;
 769
 770         while (w) {
 771             dock = qobject_cast<QDockWidget*>(w);
 772             if (dock)
 773                 break;
 774             w = w->parent();
 775         }
 776
 777         // Get the view contained in the dock widget
 778         shared_ptr<views::ViewBase> view;
 779
 780         for (auto& entry : view_docks_)
 781                 if (entry.first == dock)
 782                         view = entry.second;
 783
 784         // Deregister the view
 785         for (shared_ptr<Session> session : sessions_) {
 786                 if (!session->has_view(view))
 787                         continue;
 788
 789                 // Also destroy the entire session if its main view is closing...
 790                 if (view == session->main_view()) {
 791                         // ...but only if data is saved or the user confirms closing
 792                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 793                                 tr("This session contains unsaved data. Close it anyway?"),
 794                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 795                                 remove_session(session);
 796                         break;
 797                 } else
 798                         // All other views can be closed at any time as no data will be lost
 799                         remove_view(view);
 800         }
 801 }
 802
 803 void MainWindow::on_tab_changed(int index)
 804 {
 805         shared_ptr<Session> session = get_tab_session(index);
 806
 807         if (session)
 808                 on_focused_session_changed(session);
 809 }
 810
 811 void MainWindow::on_tab_close_requested(int index)
 812 {
 813         shared_ptr<Session> session = get_tab_session(index);
 814
 815         if (!session)
 816                 return;
 817
 818         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 819                 tr("This session contains unsaved data. Close it anyway?"),
 820                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 821                 remove_session(session);
 822 }
 823
 824 void MainWindow::on_show_decoder_selector(Session *session)
 825 {
 826 #ifdef ENABLE_DECODE
 827         // Close dock widget if it's already showing and return
 828         for (auto& entry : sub_windows_) {
 829                 QDockWidget* dock = entry.first;
 830                 shared_ptr<subwindows::SubWindowBase> decoder_selector =
 831                         dynamic_pointer_cast<subwindows::decoder_selector::SubWindow>(entry.second);
 832
 833                 if (decoder_selector && (&decoder_selector->session() == session)) {
 834                         sub_windows_.erase(dock);
 835                         dock->close();
 836                         return;
 837                 }
 838         }
 839
 840         // We get a pointer and need a reference
 841         for (shared_ptr<Session>& s : sessions_)
 842                 if (s.get() == session)
 843                         add_subwindow(subwindows::SubWindowTypeDecoderSelector, *s);
 844 #endif
 845 }
 846
 847 void MainWindow::on_sub_window_close_clicked()
 848 {
 849         // Find the dock widget that contains the close button that was clicked
 850         QObject *w = QObject::sender();
 851         QDockWidget *dock = nullptr;
 852
 853         while (w) {
 854             dock = qobject_cast<QDockWidget*>(w);
 855             if (dock)
 856                 break;
 857             w = w->parent();
 858         }
 859
 860         sub_windows_.erase(dock);
 861         dock->close();
 862 }
 863
 864 void MainWindow::on_view_colored_bg_shortcut()
 865 {
 866         GlobalSettings settings;
 867
 868         bool state = settings.value(GlobalSettings::Key_View_ColoredBG).toBool();
 869         settings.setValue(GlobalSettings::Key_View_ColoredBG, !state);
 870 }
 871
 872 void MainWindow::on_view_sticky_scrolling_shortcut()
 873 {
 874         GlobalSettings settings;
 875
 876         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 877         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 878 }
 879
 880 void MainWindow::on_view_show_sampling_points_shortcut()
 881 {
 882         GlobalSettings settings;
 883
 884         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 885         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 886 }
 887
 888 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 889 {
 890         GlobalSettings settings;
 891
 892         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 893         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 894 }
 895
 896 void MainWindow::on_close_current_tab()
 897 {
 898         int tab = session_selector_.currentIndex();
 899
 900         on_tab_close_requested(tab);
 901 }
 902
 903 } // namespace pv