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 "subwindows/decoder_selector/subwindow.hpp"
  48 #include "toolbars/mainbar.hpp"
  49 #include "util.hpp"
  50 #include "views/trace/view.hpp"
  51 #include "views/trace/standardbar.hpp"
  52
  53 #include <libsigrokcxx/libsigrokcxx.hpp>
  54
  55 using std::dynamic_pointer_cast;
  56 using std::make_shared;
  57 using std::shared_ptr;
  58 using std::string;
  59
  60 namespace pv {
  61
  62 namespace view {
  63 class ViewItem;
  64 }
  65
  66 using toolbars::MainBar;
  67
  68 const QString MainWindow::WindowTitle = tr("PulseView");
  69
  70 MainWindow::MainWindow(DeviceManager &device_manager, 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         GlobalSettings::add_change_handler(this);
  80
  81         setup_ui();
  82         restore_ui_settings();
  83 }
  84
  85 MainWindow::~MainWindow()
  86 {
  87         GlobalSettings::remove_change_handler(this);
  88
  89         // Make sure we no longer hold any shared pointers to widgets after the
  90         // destructor finishes (goes for sessions and sub windows alike)
  91
  92         while (!sessions_.empty())
  93                 remove_session(sessions_.front());
  94
  95         sub_windows_.clear();
  96 }
  97
  98 void MainWindow::show_session_error(const QString text, const QString info_text)
  99 {
 100         // TODO Emulate noquote()
 101         qDebug() << "Notifying user of session error:" << info_text;
 102
 103         QMessageBox msg;
 104         msg.setText(text + "\n\n" + info_text);
 105         msg.setStandardButtons(QMessageBox::Ok);
 106         msg.setIcon(QMessageBox::Warning);
 107         msg.exec();
 108 }
 109
 110 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
 111 {
 112         // If there's only one view, use it...
 113         if (view_docks_.size() == 1)
 114                 return view_docks_.begin()->second;
 115
 116         // ...otherwise find the dock widget the widget with focus is contained in
 117         QObject *w = QApplication::focusWidget();
 118         QDockWidget *dock = nullptr;
 119
 120         while (w) {
 121                 dock = qobject_cast<QDockWidget*>(w);
 122                 if (dock)
 123                         break;
 124                 w = w->parent();
 125         }
 126
 127         // Get the view contained in the dock widget
 128         for (auto& entry : view_docks_)
 129                 if (entry.first == dock)
 130                         return entry.second;
 131
 132         return nullptr;
 133 }
 134
 135 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
 136         views::ViewType type, Session &session)
 137 {
 138         GlobalSettings settings;
 139         shared_ptr<views::ViewBase> v;
 140
 141         QMainWindow *main_window = nullptr;
 142         for (auto& entry : session_windows_)
 143                 if (entry.first.get() == &session)
 144                         main_window = entry.second;
 145
 146         assert(main_window);
 147
 148         shared_ptr<MainBar> main_bar = session.main_bar();
 149
 150         QDockWidget* dock = new QDockWidget(title, main_window);
 151         dock->setObjectName(title);
 152         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 153
 154         // Insert a QMainWindow into the dock widget to allow for a tool bar
 155         QMainWindow *dock_main = new QMainWindow(dock);
 156         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 157
 158         if (type == views::ViewTypeTrace)
 159                 // This view will be the main view if there's no main bar yet
 160                 v = make_shared<views::trace::View>(session,
 161                         (main_bar ? false : true), dock_main);
 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                 tv->enable_colored_bg(settings.value(GlobalSettings::Key_View_ColoredBG).toBool());
 192                 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
 193                 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
 194
 195                 if (!main_bar) {
 196                         /* Initial view, create the main bar */
 197                         main_bar = make_shared<MainBar>(session, this, tv);
 198                         dock_main->addToolBar(main_bar.get());
 199                         session.set_main_bar(main_bar);
 200
 201                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
 202                                 this, SLOT(on_new_view(Session*)));
 203                         connect(main_bar.get(), SIGNAL(show_decoder_selector(Session*)),
 204                                 this, SLOT(on_show_decoder_selector(Session*)));
 205
 206                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 207
 208                         /* For the main view we need to prevent the dock widget from
 209                          * closing itself when its close button is clicked. This is
 210                          * so we can confirm with the user first. Regular views don't
 211                          * need this */
 212                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
 213                 } else {
 214                         /* Additional view, create a standard bar */
 215                         pv::views::trace::StandardBar *standard_bar =
 216                                 new pv::views::trace::StandardBar(session, this, tv);
 217                         dock_main->addToolBar(standard_bar);
 218
 219                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
 220                 }
 221         }
 222
 223         return v;
 224 }
 225
 226 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
 227 {
 228         for (shared_ptr<Session> session : sessions_) {
 229                 if (!session->has_view(view))
 230                         continue;
 231
 232                 // Find the dock the view is contained in and remove it
 233                 for (auto& entry : view_docks_)
 234                         if (entry.second == view) {
 235                                 // Remove the view from the session
 236                                 session->deregister_view(view);
 237
 238                                 // Remove the view from its parent; otherwise, Qt will
 239                                 // call deleteLater() on it, which causes a double free
 240                                 // since the shared_ptr in view_docks_ doesn't know
 241                                 // that Qt keeps a pointer to the view around
 242                                 view->setParent(nullptr);
 243
 244                                 // Delete the view's dock widget and all widgets inside it
 245                                 entry.first->deleteLater();
 246
 247                                 // Remove the dock widget from the list and stop iterating
 248                                 view_docks_.erase(entry.first);
 249                                 break;
 250                         }
 251         }
 252 }
 253
 254 shared_ptr<subwindows::SubWindowBase> MainWindow::add_subwindow(
 255         subwindows::SubWindowType type, Session &session)
 256 {
 257         GlobalSettings settings;
 258         shared_ptr<subwindows::SubWindowBase> v;
 259
 260         QMainWindow *main_window = nullptr;
 261         for (auto entry : session_windows_)
 262                 if (entry.first.get() == &session)
 263                         main_window = entry.second;
 264
 265         assert(main_window);
 266
 267         QString title = "";
 268
 269         switch (type) {
 270                 case subwindows::SubWindowTypeDecoderSelector:
 271                         title = tr("Decoder Selector");
 272         }
 273
 274         QDockWidget* dock = new QDockWidget(title, main_window);
 275         dock->setObjectName(title);
 276         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
 277
 278         // Insert a QMainWindow into the dock widget to allow for a tool bar
 279         QMainWindow *dock_main = new QMainWindow(dock);
 280         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 281
 282         if (type == subwindows::SubWindowTypeDecoderSelector)
 283                 v = make_shared<subwindows::decoder_selector::SubWindow>(session, dock_main);
 284
 285         if (!v)
 286                 return nullptr;
 287
 288         sub_windows_[dock] = v;
 289         dock_main->setCentralWidget(v.get());
 290         dock->setWidget(dock_main);
 291
 292         dock->setContextMenuPolicy(Qt::PreventContextMenu);
 293         dock->setFeatures(QDockWidget::DockWidgetMovable |
 294                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
 295
 296         QAbstractButton *close_btn =
 297                 dock->findChildren<QAbstractButton*>
 298                         ("qt_dockwidget_closebutton").front();
 299
 300         connect(close_btn, SIGNAL(clicked(bool)),
 301                 this, SLOT(on_sub_window_close_clicked()));
 302
 303         if (v->has_toolbar())
 304                 dock_main->addToolBar(v->create_toolbar(dock_main));
 305
 306         return v;
 307 }
 308
 309 shared_ptr<Session> MainWindow::add_session()
 310 {
 311         static int last_session_id = 1;
 312         QString name = tr("Session %1").arg(last_session_id++);
 313
 314         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
 315
 316         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
 317                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
 318         connect(session.get(), SIGNAL(name_changed()),
 319                 this, SLOT(on_session_name_changed()));
 320         session_state_mapper_.setMapping(session.get(), session.get());
 321         connect(session.get(), SIGNAL(capture_state_changed(int)),
 322                 &session_state_mapper_, SLOT(map()));
 323
 324         sessions_.push_back(session);
 325
 326         QMainWindow *window = new QMainWindow();
 327         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
 328         session_windows_[session] = window;
 329
 330         int index = session_selector_.addTab(window, name);
 331         session_selector_.setCurrentIndex(index);
 332         last_focused_session_ = session;
 333
 334         window->setDockNestingEnabled(true);
 335
 336         shared_ptr<views::ViewBase> main_view =
 337                 add_view(name, views::ViewTypeTrace, *session);
 338
 339         return session;
 340 }
 341
 342 void MainWindow::remove_session(shared_ptr<Session> session)
 343 {
 344         // Determine the height of the button before it collapses
 345         int h = new_session_button_->height();
 346
 347         // Stop capture while the session still exists so that the UI can be
 348         // updated in case we're currently running. If so, this will schedule a
 349         // call to our on_capture_state_changed() slot for the next run of the
 350         // event loop. We need to have this executed immediately or else it will
 351         // be dismissed since the session object will be deleted by the time we
 352         // leave this method and the event loop gets a chance to run again.
 353         session->stop_capture();
 354         QApplication::processEvents();
 355
 356         for (const shared_ptr<views::ViewBase>& view : session->views())
 357                 remove_view(view);
 358
 359         QMainWindow *window = session_windows_.at(session);
 360         session_selector_.removeTab(session_selector_.indexOf(window));
 361
 362         session_windows_.erase(session);
 363
 364         if (last_focused_session_ == session)
 365                 last_focused_session_.reset();
 366
 367         // Remove the session from our list of sessions (which also destroys it)
 368         sessions_.remove_if([&](shared_ptr<Session> s) {
 369                 return s == session; });
 370
 371         if (sessions_.empty()) {
 372                 // When there are no more tabs, the height of the QTabWidget
 373                 // drops to zero. We must prevent this to keep the static
 374                 // widgets visible
 375                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())  // clazy:exclude=range-loop
 376                         w->setMinimumHeight(h);
 377
 378                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
 379                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
 380                 session_selector_.setMinimumHeight(h + 2 * margin);
 381
 382                 // Update the window title if there is no view left to
 383                 // generate focus change events
 384                 setWindowTitle(WindowTitle);
 385         }
 386 }
 387
 388 void MainWindow::add_session_with_file(string open_file_name,
 389         string open_file_format)
 390 {
 391         shared_ptr<Session> session = add_session();
 392         session->load_init_file(open_file_name, open_file_format);
 393 }
 394
 395 void MainWindow::add_default_session()
 396 {
 397         // Only add the default session if there would be no session otherwise
 398         if (sessions_.size() > 0)
 399                 return;
 400
 401         shared_ptr<Session> session = add_session();
 402
 403         // Check the list of available devices. Prefer the one that was
 404         // found with user supplied scan specs (if applicable). Then try
 405         // one of the auto detected devices that are not the demo device.
 406         // Pick demo in the absence of "genuine" hardware devices.
 407         shared_ptr<devices::HardwareDevice> user_device, other_device, demo_device;
 408         for (const shared_ptr<devices::HardwareDevice>& dev : device_manager_.devices()) {
 409                 if (dev == device_manager_.user_spec_device()) {
 410                         user_device = dev;
 411                 } else if (dev->hardware_device()->driver()->name() == "demo") {
 412                         demo_device = dev;
 413                 } else {
 414                         other_device = dev;
 415                 }
 416         }
 417         if (user_device)
 418                 session->select_device(user_device);
 419         else if (other_device)
 420                 session->select_device(other_device);
 421         else
 422                 session->select_device(demo_device);
 423 }
 424
 425 void MainWindow::save_sessions()
 426 {
 427         QSettings settings;
 428         int id = 0;
 429
 430         for (shared_ptr<Session>& session : sessions_) {
 431                 // Ignore sessions using the demo device or no device at all
 432                 if (session->device()) {
 433                         shared_ptr<devices::HardwareDevice> device =
 434                                 dynamic_pointer_cast< devices::HardwareDevice >
 435                                 (session->device());
 436
 437                         if (device &&
 438                                 device->hardware_device()->driver()->name() == "demo")
 439                                 continue;
 440
 441                         settings.beginGroup("Session" + QString::number(id++));
 442                         settings.remove("");  // Remove all keys in this group
 443                         session->save_settings(settings);
 444                         settings.endGroup();
 445                 }
 446         }
 447
 448         settings.setValue("sessions", id);
 449 }
 450
 451 void MainWindow::restore_sessions()
 452 {
 453         QSettings settings;
 454         int i, session_count;
 455
 456         session_count = settings.value("sessions", 0).toInt();
 457
 458         for (i = 0; i < session_count; i++) {
 459                 settings.beginGroup("Session" + QString::number(i));
 460                 shared_ptr<Session> session = add_session();
 461                 session->restore_settings(settings);
 462                 settings.endGroup();
 463         }
 464 }
 465
 466 void MainWindow::on_setting_changed(const QString &key, const QVariant &value)
 467 {
 468         if (key == GlobalSettings::Key_View_ColoredBG)
 469                 on_settingViewColoredBg_changed(value);
 470
 471         if (key == GlobalSettings::Key_View_ShowSamplingPoints)
 472                 on_settingViewShowSamplingPoints_changed(value);
 473
 474         if (key == GlobalSettings::Key_View_ShowAnalogMinorGrid)
 475                 on_settingViewShowAnalogMinorGrid_changed(value);
 476 }
 477
 478 void MainWindow::setup_ui()
 479 {
 480         setObjectName(QString::fromUtf8("MainWindow"));
 481
 482         setCentralWidget(&session_selector_);
 483
 484         // Set the window icon
 485         QIcon icon;
 486         icon.addFile(QString(":/icons/pulseview.png"));
 487         setWindowIcon(icon);
 488
 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(const QString &title, views::ViewType type,
 637         Session *session)
 638 {
 639         // We get a pointer and need a reference
 640         for (shared_ptr<Session>& s : sessions_)
 641                 if (s.get() == session)
 642                         add_view(title, type, *s);
 643 }
 644
 645 void MainWindow::on_focus_changed()
 646 {
 647         shared_ptr<views::ViewBase> view = get_active_view();
 648
 649         if (view) {
 650                 for (shared_ptr<Session> session : sessions_) {
 651                         if (session->has_view(view)) {
 652                                 if (session != last_focused_session_) {
 653                                         // Activate correct tab if necessary
 654                                         shared_ptr<Session> tab_session = get_tab_session(
 655                                                 session_selector_.currentIndex());
 656                                         if (tab_session != session)
 657                                                 session_selector_.setCurrentWidget(
 658                                                         session_windows_.at(session));
 659
 660                                         on_focused_session_changed(session);
 661                                 }
 662
 663                                 break;
 664                         }
 665                 }
 666         }
 667
 668         if (sessions_.empty())
 669                 setWindowTitle(WindowTitle);
 670 }
 671
 672 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
 673 {
 674         last_focused_session_ = session;
 675
 676         setWindowTitle(session->name() + " - " + WindowTitle);
 677
 678         // Update the state of the run/stop button, too
 679         on_capture_state_changed(session.get());
 680 }
 681
 682 void MainWindow::on_new_session_clicked()
 683 {
 684         add_session();
 685 }
 686
 687 void MainWindow::on_run_stop_clicked()
 688 {
 689         shared_ptr<Session> session = last_focused_session_;
 690
 691         if (!session)
 692                 return;
 693
 694         switch (session->get_capture_state()) {
 695         case Session::Stopped:
 696                 session->start_capture([&](QString message) {
 697                         show_session_error("Capture failed", message); });
 698                 break;
 699         case Session::AwaitingTrigger:
 700         case Session::Running:
 701                 session->stop_capture();
 702                 break;
 703         }
 704 }
 705
 706 void MainWindow::on_settings_clicked()
 707 {
 708         dialogs::Settings dlg(device_manager_);
 709         dlg.exec();
 710 }
 711
 712 void MainWindow::on_session_name_changed()
 713 {
 714         // Update the corresponding dock widget's name(s)
 715         Session *session = qobject_cast<Session*>(QObject::sender());
 716         assert(session);
 717
 718         for (const shared_ptr<views::ViewBase>& view : session->views()) {
 719                 // Get the dock that contains the view
 720                 for (auto& entry : view_docks_)
 721                         if (entry.second == view) {
 722                                 entry.first->setObjectName(session->name());
 723                                 entry.first->setWindowTitle(session->name());
 724                         }
 725         }
 726
 727         // Update the tab widget by finding the main window and the tab from that
 728         for (auto& entry : session_windows_)
 729                 if (entry.first.get() == session) {
 730                         QMainWindow *window = entry.second;
 731                         const int index = session_selector_.indexOf(window);
 732                         session_selector_.setTabText(index, session->name());
 733                 }
 734
 735         // Refresh window title if the affected session has focus
 736         if (session == last_focused_session_.get())
 737                 setWindowTitle(session->name() + " - " + WindowTitle);
 738 }
 739
 740 void MainWindow::on_capture_state_changed(QObject *obj)
 741 {
 742         Session *caller = qobject_cast<Session*>(obj);
 743
 744         // Ignore if caller is not the currently focused session
 745         // unless there is only one session
 746         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
 747                 return;
 748
 749         int state = caller->get_capture_state();
 750
 751         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
 752         run_stop_button_->setIcon(*icons[state]);
 753         run_stop_button_->setText((state == pv::Session::Stopped) ?
 754                 tr("Run") : tr("Stop"));
 755 }
 756
 757 void MainWindow::on_new_view(Session *session)
 758 {
 759         // We get a pointer and need a reference
 760         for (shared_ptr<Session>& s : sessions_)
 761                 if (s.get() == session)
 762                         add_view(session->name(), views::ViewTypeTrace, *s);
 763 }
 764
 765 void MainWindow::on_view_close_clicked()
 766 {
 767         // Find the dock widget that contains the close button that was clicked
 768         QObject *w = QObject::sender();
 769         QDockWidget *dock = nullptr;
 770
 771         while (w) {
 772             dock = qobject_cast<QDockWidget*>(w);
 773             if (dock)
 774                 break;
 775             w = w->parent();
 776         }
 777
 778         // Get the view contained in the dock widget
 779         shared_ptr<views::ViewBase> view;
 780
 781         for (auto& entry : view_docks_)
 782                 if (entry.first == dock)
 783                         view = entry.second;
 784
 785         // Deregister the view
 786         for (shared_ptr<Session> session : sessions_) {
 787                 if (!session->has_view(view))
 788                         continue;
 789
 790                 // Also destroy the entire session if its main view is closing...
 791                 if (view == session->main_view()) {
 792                         // ...but only if data is saved or the user confirms closing
 793                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 794                                 tr("This session contains unsaved data. Close it anyway?"),
 795                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 796                                 remove_session(session);
 797                         break;
 798                 } else
 799                         // All other views can be closed at any time as no data will be lost
 800                         remove_view(view);
 801         }
 802 }
 803
 804 void MainWindow::on_tab_changed(int index)
 805 {
 806         shared_ptr<Session> session = get_tab_session(index);
 807
 808         if (session)
 809                 on_focused_session_changed(session);
 810 }
 811
 812 void MainWindow::on_tab_close_requested(int index)
 813 {
 814         shared_ptr<Session> session = get_tab_session(index);
 815
 816         if (!session)
 817                 return;
 818
 819         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
 820                 tr("This session contains unsaved data. Close it anyway?"),
 821                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
 822                 remove_session(session);
 823 }
 824
 825 void MainWindow::on_show_decoder_selector(Session *session)
 826 {
 827         // Close dock widget if it's already showing and return
 828         for (auto entry : sub_windows_) {
 829                 QDockWidget* dock = entry.first;
 830                 if (dynamic_pointer_cast<subwindows::decoder_selector::SubWindow>(entry.second)) {
 831                         sub_windows_.erase(dock);
 832                         dock->close();
 833                         return;
 834                 }
 835         }
 836
 837         // We get a pointer and need a reference
 838         for (shared_ptr<Session> s : sessions_)
 839                 if (s.get() == session)
 840                         add_subwindow(subwindows::SubWindowTypeDecoderSelector, *s);
 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_settingViewColoredBg_changed(const QVariant new_value)
 893 {
 894         bool state = new_value.toBool();
 895
 896         for (auto& entry : view_docks_) {
 897                 shared_ptr<views::ViewBase> viewbase = entry.second;
 898
 899                 // Only trace views have this setting
 900                 views::trace::View* view =
 901                                 qobject_cast<views::trace::View*>(viewbase.get());
 902                 if (view)
 903                         view->enable_colored_bg(state);
 904         }
 905 }
 906
 907 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
 908 {
 909         bool state = new_value.toBool();
 910
 911         for (auto& entry : view_docks_) {
 912                 shared_ptr<views::ViewBase> viewbase = entry.second;
 913
 914                 // Only trace views have this setting
 915                 views::trace::View* view =
 916                                 qobject_cast<views::trace::View*>(viewbase.get());
 917                 if (view)
 918                         view->enable_show_sampling_points(state);
 919         }
 920 }
 921
 922 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
 923 {
 924         bool state = new_value.toBool();
 925
 926         for (auto& entry : view_docks_) {
 927                 shared_ptr<views::ViewBase> viewbase = entry.second;
 928
 929                 // Only trace views have this setting
 930                 views::trace::View* view =
 931                                 qobject_cast<views::trace::View*>(viewbase.get());
 932                 if (view)
 933                         view->enable_show_analog_minor_grid(state);
 934         }
 935 }
 936
 937 void MainWindow::on_close_current_tab()
 938 {
 939         int tab = session_selector_.currentIndex();
 940
 941         on_tab_close_requested(tab);
 942 }
 943
 944 } // namespace pv