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 #endif
  55
  56 #include <libsigrokcxx/libsigrokcxx.hpp>
  57
  58 using std::dynamic_pointer_cast;
  59 using std::make_shared;
  60 using std::shared_ptr;
  61 using std::string;
  62
  63 namespace pv {
  64
  65 namespace view {
  66 class ViewItem;
  67 }
  68
  69 using toolbars::MainBar;
  70
  71 const QString MainWindow::WindowTitle = tr("PulseView");
  72
  73 MainWindow::MainWindow(DeviceManager &device_manager, QWidget *parent) :
  74         QMainWindow(parent),
  75         device_manager_(device_manager),
  76         session_selector_(this),
  77         session_state_mapper_(this),
  78         icon_red_(":/icons/status-red.svg"),
  79         icon_green_(":/icons/status-green.svg"),
  80         icon_grey_(":/icons/status-grey.svg")
  81 {
  82         GlobalSettings::add_change_handler(this);
  83
  84         setup_ui();
  85         restore_ui_settings();
  86 }
  87
  88 MainWindow::~MainWindow()
  89 {
  90         GlobalSettings::remove_change_handler(this);
  91
  92         // Make sure we no longer hold any shared pointers to widgets after the
  93         // destructor finishes (goes for sessions and sub windows alike)
  94
  95         while (!sessions_.empty())
  96                 remove_session(sessions_.front());
  97
  98         sub_windows_.clear();
  99 }
 100
 101 void MainWindow::show_session_error(const QString text, const QString info_text)
 102 {
 103         // TODO Emulate noquote()
 104         qDebug() << "Notifying user of session error:" << info_text;
 105
 106         QMessageBox msg;
 107         msg.setText(text + "\n\n" + info_text);
 108         msg.setStandardButtons(QMessageBox::Ok);
 109         msg.setIcon(QMessageBox::Warning);
 110         msg.exec();
 111 }
 112
 113 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 114 {
 115         // If there's only one view, use it...
 116         if (view_docks_.size() == 1)
 117                 return view_docks_.begin()->second;
 118
 119         // ...otherwise find the dock widget the widget with focus is contained in
 120         QObject *w = QApplication::focusWidget();
 121         QDockWidget *dock = nullptr;
 122
 123         while (w) {
 124                 dock = qobject_cast<QDockWidget*>(w);
 125                 if (dock)
 126                         break;
 127                 w = w->parent();
 128         }
 129
 130         // Get the view contained in the dock widget
 131         for (auto& entry : view_docks_)
 132                 if (entry.first == dock)
 133                         return entry.second;
 134
 135         return nullptr;
 136 }
 137
 138 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 139         views::ViewType type, Session &session)
 140 {
 141         GlobalSettings settings;
 142         shared_ptr<views::ViewBase> v;
 143
 144         QMainWindow *main_window = nullptr;
 145         for (auto& entry : session_windows_)
 146                 if (entry.first.get() == &session)
 147                         main_window = entry.second;
 148
 149         assert(main_window);
 150
 151         shared_ptr<MainBar> main_bar = session.main_bar();
 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,
 164                         (main_bar ? false : true), dock_main);
 165
 166         if (!v)
 167                 return nullptr;
 168
 169         view_docks_[dock] = v;
 170         session.register_view(v);
 171
 172         dock_main->setCentralWidget(v.get());
 173         dock->setWidget(dock_main);
 174
 175         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 176         dock->setFeatures(QDockWidget::DockWidgetMovable |
 177                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 178
 179         QAbstractButton *close_btn =
 180                 dock->findChildren<QAbstractButton*>("qt_dockwidget_closebutton")  // clazy:exclude=detaching-temporary
 181                         .front();
 182
 183         connect(close_btn, SIGNAL(clicked(bool)),
 184                 this, SLOT(on_view_close_clicked()));
 185
 186         connect(&session, SIGNAL(trigger_event(int, util::Timestamp)),
 187                 qobject_cast<views::ViewBase*>(v.get()),
 188                 SLOT(trigger_event(int, util::Timestamp)));
 189
 190         if (type == views::ViewTypeTrace) {
 191                 views::trace::View *tv =
 192                         qobject_cast<views::trace::View*>(v.get());
 193
 194                 tv->enable_colored_bg(settings.value(GlobalSettings::Key_View_ColoredBG).toBool());
 195                 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
 196                 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
 197
 198                 if (!main_bar) {
 199                         /* Initial view, create the main bar */
 200                         main_bar = make_shared<MainBar>(session, this, tv);
 201                         dock_main->addToolBar(main_bar.get());
 202                         session.set_main_bar(main_bar);
 203
 204                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 205                                 this, SLOT(on_new_view(Session*)));
 206                         connect(main_bar.get(), SIGNAL(show_decoder_selector(Session*)),
 207                                 this, SLOT(on_show_decoder_selector(Session*)));
 208
 209                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 210
 211                         /* For the main view we need to prevent the dock widget from
 212                          * closing itself when its close button is clicked. This is
 213                          * so we can confirm with the user first. Regular views don't
 214                          * need this */
 215                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 216                 } else {
 217                         /* Additional view, create a standard bar */
 218                         pv::views::trace::StandardBar *standard_bar =
 219                                 new pv::views::trace::StandardBar(session, this, tv);
 220                         dock_main->addToolBar(standard_bar);
 221
 222                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 223                 }
 224         }
 225
 226         return v;
 227 }
 228
 229 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 230 {
 231         for (shared_ptr<Session> session : sessions_) {
 232                 if (!session->has_view(view))
 233                         continue;
 234
 235                 // Find the dock the view is contained in and remove it
 236                 for (auto& entry : view_docks_)
 237                         if (entry.second == view) {
 238                                 // Remove the view from the session
 239                                 session->deregister_view(view);
 240
 241                                 // Remove the view from its parent; otherwise, Qt will
 242                                 // call deleteLater() on it, which causes a double free
 243                                 // since the shared_ptr in view_docks_ doesn't know
 244                                 // that Qt keeps a pointer to the view around
 245                                 view->setParent(nullptr);
 246
 247                                 // Delete the view's dock widget and all widgets inside it
 248                                 entry.first->deleteLater();
 249
 250                                 // Remove the dock widget from the list and stop iterating
 251                                 view_docks_.erase(entry.first);
 252                                 break;
 253                         }
 254         }
 255 }
 256
 257 shared_ptr<subwindows::SubWindowBase> MainWindow::add_subwindow(
 258         subwindows::SubWindowType type, Session &session)
 259 {
 260         GlobalSettings settings;
 261         shared_ptr<subwindows::SubWindowBase> v;
 262
 263         QMainWindow *main_window = nullptr;
 264         for (auto entry : session_windows_)
 265                 if (entry.first.get() == &session)
 266                         main_window = entry.second;
 267
 268         assert(main_window);
 269
 270         QString title = "";
 271
 272         switch (type) {
 273 #ifdef ENABLE_DECODE
 274                 case subwindows::SubWindowTypeDecoderSelector:
 275                         title = tr("Decoder Selector");
 276                         break;
 277 #endif
 278                 default:
 279                         break;
 280         }
 281
 282         QDockWidget* dock = new QDockWidget(title, main_window);
 283         dock->setObjectName(title);
 284         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 285
 286         // Insert a QMainWindow into the dock widget to allow for a tool bar
 287         QMainWindow *dock_main = new QMainWindow(dock);
 288         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 289
 290 #ifdef ENABLE_DECODE
 291         if (type == subwindows::SubWindowTypeDecoderSelector)
 292                 v = make_shared<subwindows::decoder_selector::SubWindow>(session, dock_main);
 293 #endif
 294
 295         if (!v)
 296                 return nullptr;
 297
 298         sub_windows_[dock] = v;
 299         dock_main->setCentralWidget(v.get());
 300         dock->setWidget(dock_main);
 301
 302         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 303         dock->setFeatures(QDockWidget::DockWidgetMovable |
 304                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 305
 306         QAbstractButton *close_btn =
 307                 dock->findChildren<QAbstractButton*>
 308                         ("qt_dockwidget_closebutton").front();
 309
 310         connect(close_btn, SIGNAL(clicked(bool)),
 311                 this, SLOT(on_sub_window_close_clicked()));
 312
 313         if (v->has_toolbar())
 314                 dock_main->addToolBar(v->create_toolbar(dock_main));
 315
 316         if (v->minimum_width() > 0)
 317                 dock->setMinimumSize(v->minimum_width(), 0);
 318
 319         return v;
 320 }
 321
 322 shared_ptr<Session> MainWindow::add_session()
 323 {
 324         static int last_session_id = 1;
 325         QString name = tr("Session %1").arg(last_session_id++);
 326
 327         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 328
 329         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 330                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 331         connect(session.get(), SIGNAL(name_changed()),
 332                 this, SLOT(on_session_name_changed()));
 333         session_state_mapper_.setMapping(session.get(), session.get());
 334         connect(session.get(), SIGNAL(capture_state_changed(int)),
 335                 &session_state_mapper_, SLOT(map()));
 336
 337         sessions_.push_back(session);
 338
 339         QMainWindow *window = new QMainWindow();
 340         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 341         session_windows_[session] = window;
 342
 343         int index = session_selector_.addTab(window, name);
 344         session_selector_.setCurrentIndex(index);
 345         last_focused_session_ = session;
 346
 347         window->setDockNestingEnabled(true);
 348
 349         shared_ptr<views::ViewBase> main_view =
 350                 add_view(name, views::ViewTypeTrace, *session);
 351
 352         return session;
 353 }
 354
 355 void MainWindow::remove_session(shared_ptr<Session> session)
 356 {
 357         // Determine the height of the button before it collapses
 358         int h = new_session_button_->height();
 359
 360         // Stop capture while the session still exists so that the UI can be
 361         // updated in case we're currently running. If so, this will schedule a
 362         // call to our on_capture_state_changed() slot for the next run of the
 363         // event loop. We need to have this executed immediately or else it will
 364         // be dismissed since the session object will be deleted by the time we
 365         // leave this method and the event loop gets a chance to run again.
 366         session->stop_capture();
 367         QApplication::processEvents();
 368
 369         for (const shared_ptr<views::ViewBase>& view : session->views())
 370                 remove_view(view);
 371
 372         QMainWindow *window = session_windows_.at(session);
 373         session_selector_.removeTab(session_selector_.indexOf(window));
 374
 375         session_windows_.erase(session);
 376
 377         if (last_focused_session_ == session)
 378                 last_focused_session_.reset();
 379
 380         // Remove the session from our list of sessions (which also destroys it)
 381         sessions_.remove_if([&](shared_ptr<Session> s) {
 382                 return s == session; });
 383
 384         if (sessions_.empty()) {
 385                 // When there are no more tabs, the height of the QTabWidget
 386                 // drops to zero. We must prevent this to keep the static
 387                 // widgets visible
 388                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())  // clazy:exclude=range-loop
 389                         w->setMinimumHeight(h);
 390
 391                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 392                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 393                 session_selector_.setMinimumHeight(h + 2 * margin);
 394
 395                 // Update the window title if there is no view left to
 396                 // generate focus change events
 397                 setWindowTitle(WindowTitle);
 398         }
 399 }
 400
 401 void MainWindow::add_session_with_file(string open_file_name,
 402         string open_file_format, string open_setup_file_name)
 403 {
 404         shared_ptr<Session> session = add_session();
 405         session->load_init_file(open_file_name, open_file_format, open_setup_file_name);
 406 }
 407
 408 void MainWindow::add_default_session()
 409 {
 410         // Only add the default session if there would be no session otherwise
 411         if (sessions_.size() > 0)
 412                 return;
 413
 414         shared_ptr<Session> session = add_session();
 415
 416         // Check the list of available devices. Prefer the one that was
 417         // found with user supplied scan specs (if applicable). Then try
 418         // one of the auto detected devices that are not the demo device.
 419         // Pick demo in the absence of "genuine" hardware devices.
 420         shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
 421         for (const shared_ptr<devices::HardwareDevice>& dev : device_manager_.devices()) {
 422                 if (dev == device_manager_.user_spec_device()) {
 423                         user_device = dev;
 424                 } else if (dev->hardware_device()->driver()->name() == "demo") {
 425                         demo_device = dev;
 426                 } else {
 427                         other_device = dev;
 428                 }
 429         }
 430         if (user_device)
 431                 session->select_device(user_device);
 432         else if (other_device)
 433                 session->select_device(other_device);
 434         else
 435                 session->select_device(demo_device);
 436 }
 437
 438 void MainWindow::save_sessions()
 439 {
 440         QSettings settings;
 441         int id = 0;
 442
 443         for (shared_ptr<Session>& session : sessions_) {
 444                 // Ignore sessions using the demo device or no device at all
 445                 if (session->device()) {
 446                         shared_ptr<devices::HardwareDevice> device =
 447                                 dynamic_pointer_cast< devices::HardwareDevice >
 448                                 (session->device());
 449
 450                         if (device &&
 451                                 device->hardware_device()->driver()->name() == "demo")
 452                                 continue;
 453
 454                         settings.beginGroup("Session" + QString::number(id++));
 455                         settings.remove("");  // Remove all keys in this group
 456                         session->save_settings(settings);
 457                         settings.endGroup();
 458                 }
 459         }
 460
 461         settings.setValue("sessions", id);
 462 }
 463
 464 void MainWindow::restore_sessions()
 465 {
 466         QSettings settings;
 467         int i, session_count;
 468
 469         session_count = settings.value("sessions", 0).toInt();
 470
 471         for (i = 0; i < session_count; i++) {
 472                 settings.beginGroup("Session" + QString::number(i));
 473                 shared_ptr<Session> session = add_session();
 474                 session->restore_settings(settings);
 475                 settings.endGroup();
 476         }
 477 }
 478
 479 void MainWindow::on_setting_changed(const QString &key, const QVariant &value)
 480 {
 481         if (key == GlobalSettings::Key_View_ColoredBG)
 482                 on_settingViewColoredBg_changed(value);
 483
 484         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
 485                 on_settingViewShowSamplingPoints_changed(value);
 486
 487         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
 488                 on_settingViewShowAnalogMinorGrid_changed(value);
 489 }
 490
 491 void MainWindow::setup_ui()
 492 {
 493         setObjectName(QString::fromUtf8("MainWindow"));
 494
 495         setCentralWidget(&session_selector_);
 496
 497         // Set the window icon
 498         QIcon icon;
 499         icon.addFile(QString(":/icons/pulseview.png"));
 500         setWindowIcon(icon);
 501
 502         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
 503         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
 504
 505         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
 506         view_show_sampling_points_shortcut_->setAutoRepeat(false);
 507
 508         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
 509         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
 510
 511         view_colored_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_colored_bg_shortcut()));
 512         view_colored_bg_shortcut_->setAutoRepeat(false);
 513
 514         zoom_in_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Plus), this, SLOT(on_zoom_in_shortcut_triggered()));
 515         zoom_in_shortcut_->setAutoRepeat(false);
 516
 517         zoom_out_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Minus), this, SLOT(on_zoom_out_shortcut_triggered()));
 518         zoom_out_shortcut_->setAutoRepeat(false);
 519
 520         // Set up the tab area
 521         new_session_button_ = new QToolButton();
 522         new_session_button_->setIcon(QIcon::fromTheme("document-new",
 523                 QIcon(":/icons/document-new.png")));
 524         new_session_button_->setToolTip(tr("Create New Session"));
 525         new_session_button_->setAutoRaise(true);
 526
 527         run_stop_button_ = new QToolButton();
 528         run_stop_button_->setAutoRaise(true);
 529         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
 530         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
 531
 532         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
 533         run_stop_shortcut_->setAutoRepeat(false);
 534
 535         settings_button_ = new QToolButton();
 536         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
 537                 QIcon(":/icons/preferences-system.png")));
 538         settings_button_->setToolTip(tr("Settings"));
 539         settings_button_->setAutoRaise(true);
 540
 541         QFrame *separator1 = new QFrame();
 542         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
 543         QFrame *separator2 = new QFrame();
 544         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
 545
 546         QHBoxLayout* layout = new QHBoxLayout();
 547         layout->setContentsMargins(2, 2, 2, 2);
 548         layout->addWidget(new_session_button_);
 549         layout->addWidget(separator1);
 550         layout->addWidget(run_stop_button_);
 551         layout->addWidget(separator2);
 552         layout->addWidget(settings_button_);
 553
 554         static_tab_widget_ = new QWidget();
 555         static_tab_widget_->setLayout(layout);
 556
 557         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
 558         session_selector_.setTabsClosable(true);
 559
 560         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
 561         close_application_shortcut_->setAutoRepeat(false);
 562
 563         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
 564
 565         connect(new_session_button_, SIGNAL(clicked(bool)),
 566                 this, SLOT(on_new_session_clicked()));
 567         connect(run_stop_button_, SIGNAL(clicked(bool)),
 568                 this, SLOT(on_run_stop_clicked()));
 569         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
 570                 this, SLOT(on_capture_state_changed(QObject*)));
 571         connect(settings_button_, SIGNAL(clicked(bool)),
 572                 this, SLOT(on_settings_clicked()));
 573
 574         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
 575                 this, SLOT(on_tab_close_requested(int)));
 576         connect(&session_selector_, SIGNAL(currentChanged(int)),
 577                 this, SLOT(on_tab_changed(int)));
 578
 579
 580         connect(static_cast<QApplication *>(QCoreApplication::instance()),
 581                 SIGNAL(focusChanged(QWidget*, QWidget*)),
 582                 this, SLOT(on_focus_changed()));
 583 }
 584
 585 void MainWindow::save_ui_settings()
 586 {
 587         QSettings settings;
 588
 589         settings.beginGroup("MainWindow");
 590         settings.setValue("state", saveState());
 591         settings.setValue("geometry", saveGeometry());
 592         settings.endGroup();
 593 }
 594
 595 void MainWindow::restore_ui_settings()
 596 {
 597         QSettings settings;
 598
 599         settings.beginGroup("MainWindow");
 600
 601         if (settings.contains("geometry")) {
 602                 restoreGeometry(settings.value("geometry").toByteArray());
 603                 restoreState(settings.value("state").toByteArray());
 604         } else
 605                 resize(1000, 720);
 606
 607         settings.endGroup();
 608 }
 609
 610 void MainWindow::zoom_current_view(double steps)
 611 {
 612         shared_ptr<Session> session = get_tab_session(session_selector_.currentIndex());
 613
 614         if (!session)
 615                 return;
 616
 617         shared_ptr<views::ViewBase> v = session.get()->main_view();
 618         views::trace::View *tv =
 619                 qobject_cast<views::trace::View*>(v.get());
 620         tv->zoom(steps);
 621 }
 622
 623 shared_ptr<Session> MainWindow::get_tab_session(int index) const
 624 {
 625         // Find the session that belongs to the tab's main window
 626         for (auto& entry : session_windows_)
 627                 if (entry.second == session_selector_.widget(index))
 628                         return entry.first;
 629
 630         return nullptr;
 631 }
 632
 633 void MainWindow::closeEvent(QCloseEvent *event)
 634 {
 635         bool data_saved = true;
 636
 637         for (auto& entry : session_windows_)
 638                 if (!entry.first->data_saved())
 639                         data_saved = false;
 640
 641         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
 642                 tr("There is unsaved data. Close anyway?"),
 643                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
 644                 event->ignore();
 645         } else {
 646                 save_ui_settings();
 647                 save_sessions();
 648                 event->accept();
 649         }
 650 }
 651
 652 QMenu* MainWindow::createPopupMenu()
 653 {
 654         return nullptr;
 655 }
 656
 657 bool MainWindow::restoreState(const QByteArray &state, int version)
 658 {
 659         (void)state;
 660         (void)version;
 661
 662         // Do nothing. We don't want Qt to handle this, or else it
 663         // will try to restore all the dock widgets and create havoc.
 664
 665         return false;
 666 }
 667
 668 void MainWindow::on_add_view(const QString &title, views::ViewType type,
 669         Session *session)
 670 {
 671         // We get a pointer and need a reference
 672         for (shared_ptr<Session>& s : sessions_)
 673                 if (s.get() == session)
 674                         add_view(title, type, *s);
 675 }
 676
 677 void MainWindow::on_focus_changed()
 678 {
 679         shared_ptr<views::ViewBase> view = get_active_view();
 680
 681         if (view) {
 682                 for (shared_ptr<Session> session : sessions_) {
 683                         if (session->has_view(view)) {
 684                                 if (session != last_focused_session_) {
 685                                         // Activate correct tab if necessary
 686                                         shared_ptr<Session> tab_session = get_tab_session(
 687                                                 session_selector_.currentIndex());
 688                                         if (tab_session != session)
 689                                                 session_selector_.setCurrentWidget(
 690                                                         session_windows_.at(session));
 691
 692                                         on_focused_session_changed(session);
 693                                 }
 694
 695                                 break;
 696                         }
 697                 }
 698         }
 699
 700         if (sessions_.empty())
 701                 setWindowTitle(WindowTitle);
 702 }
 703
 704 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 705 {
 706         last_focused_session_ = session;
 707
 708         setWindowTitle(session->name() + " - " + WindowTitle);
 709
 710         // Update the state of the run/stop button, too
 711         on_capture_state_changed(session.get());
 712 }
 713
 714 void MainWindow::on_new_session_clicked()
 715 {
 716         add_session();
 717 }
 718
 719 void MainWindow::on_run_stop_clicked()
 720 {
 721         shared_ptr<Session> session = last_focused_session_;
 722
 723         if (!session)
 724                 return;
 725
 726         switch (session->get_capture_state()) {
 727         case Session::Stopped:
 728                 session->start_capture([&](QString message) {
 729                         show_session_error("Capture failed", message); });
 730                 break;
 731         case Session::AwaitingTrigger:
 732         case Session::Running:
 733                 session->stop_capture();
 734                 break;
 735         }
 736 }
 737
 738 void MainWindow::on_settings_clicked()
 739 {
 740         dialogs::Settings dlg(device_manager_);
 741         dlg.exec();
 742 }
 743
 744 void MainWindow::on_session_name_changed()
 745 {
 746         // Update the corresponding dock widget's name(s)
 747         Session *session = qobject_cast<Session*>(QObject::sender());
 748         assert(session);
 749
 750         for (const shared_ptr<views::ViewBase>& view : session->views()) {
 751                 // Get the dock that contains the view
 752                 for (auto& entry : view_docks_)
 753                         if (entry.second == view) {
 754                                 entry.first->setObjectName(session->name());
 755                                 entry.first->setWindowTitle(session->name());
 756                         }
 757         }
 758
 759         // Update the tab widget by finding the main window and the tab from that
 760         for (auto& entry : session_windows_)
 761                 if (entry.first.get() == session) {
 762                         QMainWindow *window = entry.second;
 763                         const int index = session_selector_.indexOf(window);
 764                         session_selector_.setTabText(index, session->name());
 765                 }
 766
 767         // Refresh window title if the affected session has focus
 768         if (session == last_focused_session_.get())
 769                 setWindowTitle(session->name() + " - " + WindowTitle);
 770 }
 771
 772 void MainWindow::on_capture_state_changed(QObject *obj)
 773 {
 774         Session *caller = qobject_cast<Session*>(obj);
 775
 776         // Ignore if caller is not the currently focused session
 777         // unless there is only one session
 778         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 779                 return;
 780
 781         int state = caller->get_capture_state();
 782
 783         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 784         run_stop_button_->setIcon(*icons[state]);
 785         run_stop_button_->setText((state == pv::Session::Stopped) ?
 786                 tr("Run") : tr("Stop"));
 787 }
 788
 789 void MainWindow::on_new_view(Session *session)
 790 {
 791         // We get a pointer and need a reference
 792         for (shared_ptr<Session>& s : sessions_)
 793                 if (s.get() == session)
 794                         add_view(session->name(), views::ViewTypeTrace, *s);
 795 }
 796
 797 void MainWindow::on_view_close_clicked()
 798 {
 799         // Find the dock widget that contains the close button that was clicked
 800         QObject *w = QObject::sender();
 801         QDockWidget *dock = nullptr;
 802
 803         while (w) {
 804             dock = qobject_cast<QDockWidget*>(w);
 805             if (dock)
 806                 break;
 807             w = w->parent();
 808         }
 809
 810         // Get the view contained in the dock widget
 811         shared_ptr<views::ViewBase> view;
 812
 813         for (auto& entry : view_docks_)
 814                 if (entry.first == dock)
 815                         view = entry.second;
 816
 817         // Deregister the view
 818         for (shared_ptr<Session> session : sessions_) {
 819                 if (!session->has_view(view))
 820                         continue;
 821
 822                 // Also destroy the entire session if its main view is closing...
 823                 if (view == session->main_view()) {
 824                         // ...but only if data is saved or the user confirms closing
 825                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 826                                 tr("This session contains unsaved data. Close it anyway?"),
 827                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 828                                 remove_session(session);
 829                         break;
 830                 } else
 831                         // All other views can be closed at any time as no data will be lost
 832                         remove_view(view);
 833         }
 834 }
 835
 836 void MainWindow::on_tab_changed(int index)
 837 {
 838         shared_ptr<Session> session = get_tab_session(index);
 839
 840         if (session)
 841                 on_focused_session_changed(session);
 842 }
 843
 844 void MainWindow::on_tab_close_requested(int index)
 845 {
 846         shared_ptr<Session> session = get_tab_session(index);
 847
 848         if (!session)
 849                 return;
 850
 851         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 852                 tr("This session contains unsaved data. Close it anyway?"),
 853                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 854                 remove_session(session);
 855 }
 856
 857 void MainWindow::on_show_decoder_selector(Session *session)
 858 {
 859 #ifdef ENABLE_DECODE
 860         // Close dock widget if it's already showing and return
 861         for (auto entry : sub_windows_) {
 862                 QDockWidget* dock = entry.first;
 863                 if (dynamic_pointer_cast<subwindows::decoder_selector::SubWindow>(entry.second)) {
 864                         sub_windows_.erase(dock);
 865                         dock->close();
 866                         return;
 867                 }
 868         }
 869
 870         // We get a pointer and need a reference
 871         for (shared_ptr<Session> s : sessions_)
 872                 if (s.get() == session)
 873                         add_subwindow(subwindows::SubWindowTypeDecoderSelector, *s);
 874 #endif
 875 }
 876
 877 void MainWindow::on_sub_window_close_clicked()
 878 {
 879         // Find the dock widget that contains the close button that was clicked
 880         QObject *w = QObject::sender();
 881         QDockWidget *dock = nullptr;
 882
 883         while (w) {
 884             dock = qobject_cast<QDockWidget*>(w);
 885             if (dock)
 886                 break;
 887             w = w->parent();
 888         }
 889
 890         sub_windows_.erase(dock);
 891         dock->close();
 892 }
 893
 894 void MainWindow::on_view_colored_bg_shortcut()
 895 {
 896         GlobalSettings settings;
 897
 898         bool state = settings.value(GlobalSettings::Key_View_ColoredBG).toBool();
 899         settings.setValue(GlobalSettings::Key_View_ColoredBG, !state);
 900 }
 901
 902 void MainWindow::on_view_sticky_scrolling_shortcut()
 903 {
 904         GlobalSettings settings;
 905
 906         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
 907         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
 908 }
 909
 910 void MainWindow::on_view_show_sampling_points_shortcut()
 911 {
 912         GlobalSettings settings;
 913
 914         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
 915         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
 916 }
 917
 918 void MainWindow::on_view_show_analog_minor_grid_shortcut()
 919 {
 920         GlobalSettings settings;
 921
 922         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
 923         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
 924 }
 925
 926 void MainWindow::on_settingViewColoredBg_changed(const QVariant new_value)
 927 {
 928         bool state = new_value.toBool();
 929
 930         for (auto& entry : view_docks_) {
 931                 shared_ptr<views::ViewBase> viewbase = entry.second;
 932
 933                 // Only trace views have this setting
 934                 views::trace::View* view =
 935                                 qobject_cast<views::trace::View*>(viewbase.get());
 936                 if (view)
 937                         view->enable_colored_bg(state);
 938         }
 939 }
 940
 941 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
 942 {
 943         bool state = new_value.toBool();
 944
 945         for (auto& entry : view_docks_) {
 946                 shared_ptr<views::ViewBase> viewbase = entry.second;
 947
 948                 // Only trace views have this setting
 949                 views::trace::View* view =
 950                                 qobject_cast<views::trace::View*>(viewbase.get());
 951                 if (view)
 952                         view->enable_show_sampling_points(state);
 953         }
 954 }
 955
 956 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
 957 {
 958         bool state = new_value.toBool();
 959
 960         for (auto& entry : view_docks_) {
 961                 shared_ptr<views::ViewBase> viewbase = entry.second;
 962
 963                 // Only trace views have this setting
 964                 views::trace::View* view =
 965                                 qobject_cast<views::trace::View*>(viewbase.get());
 966                 if (view)
 967                         view->enable_show_analog_minor_grid(state);
 968         }
 969 }
 970
 971 void MainWindow::on_zoom_out_shortcut_triggered()
 972 {
 973         zoom_current_view(-1);
 974 }
 975
 976 void MainWindow::on_zoom_in_shortcut_triggered()
 977 {
 978         zoom_current_view(1);
 979 }
 980
 981 void MainWindow::on_close_current_tab()
 982 {
 983         int tab = session_selector_.currentIndex();
 984
 985         on_tab_close_requested(tab);
 986 }
 987
 988 } // namespace pv