View: Limit header pane width
[pulseview.git] / 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 <QDockWidget>
34 #include <QHBoxLayout>
35 #include <QMessageBox>
36 #include <QSettings>
37 #include <QShortcut>
38 #include <QWidget>
39
40 #include "mainwindow.hpp"
41
42 #include "devicemanager.hpp"
43 #include "devices/hardwaredevice.hpp"
44 #include "dialogs/settings.hpp"
45 #include "globalsettings.hpp"
46 #include "toolbars/mainbar.hpp"
47 #include "util.hpp"
48 #include "view/view.hpp"
49 #include "views/trace/standardbar.hpp"
50
51 #include <libsigrokcxx/libsigrokcxx.hpp>
52
53 using std::bind;
54 using std::dynamic_pointer_cast;
55 using std::make_shared;
56 using std::map;
57 using std::placeholders::_1;
58 using std::shared_ptr;
59 using std::string;
60
61 namespace pv {
62
63 namespace view {
64 class ViewItem;
65 }
66
67 using toolbars::MainBar;
68
69 const QString MainWindow::WindowTitle = tr("PulseView");
70
71 MainWindow::MainWindow(DeviceManager &device_manager,
72         string open_file_name, string open_file_format,
73         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         qRegisterMetaType<util::Timestamp>("util::Timestamp");
83         qRegisterMetaType<uint64_t>("uint64_t");
84
85         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ColouredBG,
86                 bind(&MainWindow::on_settingViewColouredBg_changed, this, _1));
87
88         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ShowSamplingPoints,
89                 bind(&MainWindow::on_settingViewShowSamplingPoints_changed, this, _1));
90
91         GlobalSettings::register_change_handler(GlobalSettings::Key_View_ShowAnalogMinorGrid,
92                 bind(&MainWindow::on_settingViewShowAnalogMinorGrid_changed, this, _1));
93
94         setup_ui();
95         restore_ui_settings();
96
97         if (!open_file_name.empty()) {
98                 shared_ptr<Session> session = add_session();
99                 session->load_init_file(open_file_name, open_file_format);
100         }
101
102         // Add empty default session if there aren't any sessions
103         if (sessions_.size() == 0) {
104                 shared_ptr<Session> session = add_session();
105
106                 map<string, string> dev_info;
107                 shared_ptr<devices::HardwareDevice> other_device, demo_device;
108
109                 // Use any available device that's not demo
110                 for (shared_ptr<devices::HardwareDevice> dev : device_manager_.devices()) {
111                         if (dev->hardware_device()->driver()->name() == "demo") {
112                                 demo_device = dev;
113                         } else {
114                                 other_device = dev;
115                         }
116                 }
117
118                 // ...and if there isn't any, just use demo then
119                 session->select_device(other_device ? other_device : demo_device);
120         }
121 }
122
123 MainWindow::~MainWindow()
124 {
125         while (!sessions_.empty())
126                 remove_session(sessions_.front());
127 }
128
129 shared_ptr<views::ViewBase> MainWindow::get_active_view() const
130 {
131         // If there's only one view, use it...
132         if (view_docks_.size() == 1)
133                 return view_docks_.begin()->second;
134
135         // ...otherwise find the dock widget the widget with focus is contained in
136         QObject *w = QApplication::focusWidget();
137         QDockWidget *dock = nullptr;
138
139         while (w) {
140                 dock = qobject_cast<QDockWidget*>(w);
141                 if (dock)
142                         break;
143                 w = w->parent();
144         }
145
146         // Get the view contained in the dock widget
147         for (auto entry : view_docks_)
148                 if (entry.first == dock)
149                         return entry.second;
150
151         return nullptr;
152 }
153
154 shared_ptr<views::ViewBase> MainWindow::add_view(const QString &title,
155         views::ViewType type, Session &session)
156 {
157         GlobalSettings settings;
158         shared_ptr<views::ViewBase> v;
159
160         QMainWindow *main_window = nullptr;
161         for (auto entry : session_windows_)
162                 if (entry.first.get() == &session)
163                         main_window = entry.second;
164
165         assert(main_window);
166
167         shared_ptr<MainBar> main_bar = session.main_bar();
168
169         QDockWidget* dock = new QDockWidget(title, main_window);
170         dock->setObjectName(title);
171         main_window->addDockWidget(Qt::TopDockWidgetArea, dock);
172
173         // Insert a QMainWindow into the dock widget to allow for a tool bar
174         QMainWindow *dock_main = new QMainWindow(dock);
175         dock_main->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
176
177         if (type == views::ViewTypeTrace)
178                 // This view will be the main view if there's no main bar yet
179                 v = make_shared<views::TraceView::View>(session,
180                         (main_bar ? false : true), dock_main);
181
182         if (!v)
183                 return nullptr;
184
185         view_docks_[dock] = v;
186         session.register_view(v);
187
188         dock_main->setCentralWidget(v.get());
189         dock->setWidget(dock_main);
190
191         dock->setContextMenuPolicy(Qt::PreventContextMenu);
192         dock->setFeatures(QDockWidget::DockWidgetMovable |
193                 QDockWidget::DockWidgetFloatable | QDockWidget::DockWidgetClosable);
194
195         QAbstractButton *close_btn =
196                 dock->findChildren<QAbstractButton*>
197                         ("qt_dockwidget_closebutton").front();
198
199         connect(close_btn, SIGNAL(clicked(bool)),
200                 this, SLOT(on_view_close_clicked()));
201
202         connect(&session, SIGNAL(trigger_event(util::Timestamp)),
203                 qobject_cast<views::ViewBase*>(v.get()),
204                 SLOT(trigger_event(util::Timestamp)));
205
206         if (type == views::ViewTypeTrace) {
207                 views::TraceView::View *tv =
208                         qobject_cast<views::TraceView::View*>(v.get());
209
210                 tv->enable_coloured_bg(settings.value(GlobalSettings::Key_View_ColouredBG).toBool());
211                 tv->enable_show_sampling_points(settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool());
212                 tv->enable_show_analog_minor_grid(settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool());
213
214                 if (!main_bar) {
215                         /* Initial view, create the main bar */
216                         main_bar = make_shared<MainBar>(session, this, tv);
217                         dock_main->addToolBar(main_bar.get());
218                         session.set_main_bar(main_bar);
219
220                         connect(main_bar.get(), SIGNAL(new_view(Session*)),
221                                 this, SLOT(on_new_view(Session*)));
222
223                         main_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
224
225                         /* For the main view we need to prevent the dock widget from
226                          * closing itself when its close button is clicked. This is
227                          * so we can confirm with the user first. Regular views don't
228                          * need this */
229                         close_btn->disconnect(SIGNAL(clicked()), dock, SLOT(close()));
230                 } else {
231                         /* Additional view, create a standard bar */
232                         pv::views::trace::StandardBar *standard_bar =
233                                 new pv::views::trace::StandardBar(session, this, tv);
234                         dock_main->addToolBar(standard_bar);
235
236                         standard_bar->action_view_show_cursors()->setChecked(tv->cursors_shown());
237                 }
238         }
239
240         return v;
241 }
242
243 void MainWindow::remove_view(shared_ptr<views::ViewBase> view)
244 {
245         for (shared_ptr<Session> session : sessions_) {
246                 if (!session->has_view(view))
247                         continue;
248
249                 // Find the dock the view is contained in and remove it
250                 for (auto entry : view_docks_)
251                         if (entry.second == view) {
252                                 // Remove the view from the session
253                                 session->deregister_view(view);
254
255                                 // Remove the view from its parent; otherwise, Qt will
256                                 // call deleteLater() on it, which causes a double free
257                                 // since the shared_ptr in view_docks_ doesn't know
258                                 // that Qt keeps a pointer to the view around
259                                 view->setParent(nullptr);
260
261                                 // Delete the view's dock widget and all widgets inside it
262                                 entry.first->deleteLater();
263
264                                 // Remove the dock widget from the list and stop iterating
265                                 view_docks_.erase(entry.first);
266                                 break;
267                         }
268         }
269 }
270
271 shared_ptr<Session> MainWindow::add_session()
272 {
273         static int last_session_id = 1;
274         QString name = tr("Session %1").arg(last_session_id++);
275
276         shared_ptr<Session> session = make_shared<Session>(device_manager_, name);
277
278         connect(session.get(), SIGNAL(add_view(const QString&, views::ViewType, Session*)),
279                 this, SLOT(on_add_view(const QString&, views::ViewType, Session*)));
280         connect(session.get(), SIGNAL(name_changed()),
281                 this, SLOT(on_session_name_changed()));
282         session_state_mapper_.setMapping(session.get(), session.get());
283         connect(session.get(), SIGNAL(capture_state_changed(int)),
284                 &session_state_mapper_, SLOT(map()));
285
286         sessions_.push_back(session);
287
288         QMainWindow *window = new QMainWindow();
289         window->setWindowFlags(Qt::Widget);  // Remove Qt::Window flag
290         session_windows_[session] = window;
291
292         int index = session_selector_.addTab(window, name);
293         session_selector_.setCurrentIndex(index);
294         last_focused_session_ = session;
295
296         window->setDockNestingEnabled(true);
297
298         shared_ptr<views::ViewBase> main_view =
299                 add_view(name, views::ViewTypeTrace, *session);
300
301         return session;
302 }
303
304 void MainWindow::remove_session(shared_ptr<Session> session)
305 {
306         int h = new_session_button_->height();
307
308         for (shared_ptr<views::ViewBase> view : session->views())
309                 remove_view(view);
310
311         QMainWindow *window = session_windows_.at(session);
312         session_selector_.removeTab(session_selector_.indexOf(window));
313
314         session_windows_.erase(session);
315
316         if (last_focused_session_ == session)
317                 last_focused_session_.reset();
318
319         sessions_.remove_if([&](shared_ptr<Session> s) {
320                 return s == session; });
321
322         if (sessions_.empty()) {
323                 // When there are no more tabs, the height of the QTabWidget
324                 // drops to zero. We must prevent this to keep the static
325                 // widgets visible
326                 for (QWidget *w : static_tab_widget_->findChildren<QWidget*>())
327                         w->setMinimumHeight(h);
328
329                 int margin = static_tab_widget_->layout()->contentsMargins().bottom();
330                 static_tab_widget_->setMinimumHeight(h + 2 * margin);
331                 session_selector_.setMinimumHeight(h + 2 * margin);
332
333                 // Update the window title if there is no view left to
334                 // generate focus change events
335                 setWindowTitle(WindowTitle);
336         }
337 }
338
339 void MainWindow::setup_ui()
340 {
341         setObjectName(QString::fromUtf8("MainWindow"));
342
343         setCentralWidget(&session_selector_);
344
345         // Set the window icon
346         QIcon icon;
347         icon.addFile(QString(":/icons/sigrok-logo-notext.png"));
348         setWindowIcon(icon);
349
350         view_sticky_scrolling_shortcut_ = new QShortcut(QKeySequence(Qt::Key_S), this, SLOT(on_view_sticky_scrolling_shortcut()));
351         view_sticky_scrolling_shortcut_->setAutoRepeat(false);
352
353         view_show_sampling_points_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Period), this, SLOT(on_view_show_sampling_points_shortcut()));
354         view_show_sampling_points_shortcut_->setAutoRepeat(false);
355
356         view_show_analog_minor_grid_shortcut_ = new QShortcut(QKeySequence(Qt::Key_G), this, SLOT(on_view_show_analog_minor_grid_shortcut()));
357         view_show_analog_minor_grid_shortcut_->setAutoRepeat(false);
358
359         view_coloured_bg_shortcut_ = new QShortcut(QKeySequence(Qt::Key_B), this, SLOT(on_view_coloured_bg_shortcut()));
360         view_coloured_bg_shortcut_->setAutoRepeat(false);
361
362         // Set up the tab area
363         new_session_button_ = new QToolButton();
364         new_session_button_->setIcon(QIcon::fromTheme("document-new",
365                 QIcon(":/icons/document-new.png")));
366         new_session_button_->setToolTip(tr("Create New Session"));
367         new_session_button_->setAutoRaise(true);
368
369         run_stop_button_ = new QToolButton();
370         run_stop_button_->setAutoRaise(true);
371         run_stop_button_->setToolButtonStyle(Qt::ToolButtonTextBesideIcon);
372         run_stop_button_->setToolTip(tr("Start/Stop Acquisition"));
373
374         run_stop_shortcut_ = new QShortcut(QKeySequence(Qt::Key_Space), run_stop_button_, SLOT(click()));
375         run_stop_shortcut_->setAutoRepeat(false);
376
377         settings_button_ = new QToolButton();
378         settings_button_->setIcon(QIcon::fromTheme("preferences-system",
379                 QIcon(":/icons/preferences-system.png")));
380         settings_button_->setToolTip(tr("Settings"));
381         settings_button_->setAutoRaise(true);
382
383         QFrame *separator1 = new QFrame();
384         separator1->setFrameStyle(QFrame::VLine | QFrame::Raised);
385         QFrame *separator2 = new QFrame();
386         separator2->setFrameStyle(QFrame::VLine | QFrame::Raised);
387
388         QHBoxLayout* layout = new QHBoxLayout();
389         layout->setContentsMargins(2, 2, 2, 2);
390         layout->addWidget(new_session_button_);
391         layout->addWidget(separator1);
392         layout->addWidget(run_stop_button_);
393         layout->addWidget(separator2);
394         layout->addWidget(settings_button_);
395
396         static_tab_widget_ = new QWidget();
397         static_tab_widget_->setLayout(layout);
398
399         session_selector_.setCornerWidget(static_tab_widget_, Qt::TopLeftCorner);
400         session_selector_.setTabsClosable(true);
401
402         close_application_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_Q), this, SLOT(close()));
403         close_application_shortcut_->setAutoRepeat(false);
404
405         close_current_tab_shortcut_ = new QShortcut(QKeySequence(Qt::CTRL + Qt::Key_W), this, SLOT(on_close_current_tab()));
406
407         connect(new_session_button_, SIGNAL(clicked(bool)),
408                 this, SLOT(on_new_session_clicked()));
409         connect(run_stop_button_, SIGNAL(clicked(bool)),
410                 this, SLOT(on_run_stop_clicked()));
411         connect(&session_state_mapper_, SIGNAL(mapped(QObject*)),
412                 this, SLOT(on_capture_state_changed(QObject*)));
413         connect(settings_button_, SIGNAL(clicked(bool)),
414                 this, SLOT(on_settings_clicked()));
415
416         connect(&session_selector_, SIGNAL(tabCloseRequested(int)),
417                 this, SLOT(on_tab_close_requested(int)));
418         connect(&session_selector_, SIGNAL(currentChanged(int)),
419                 this, SLOT(on_tab_changed(int)));
420
421
422         connect(static_cast<QApplication *>(QCoreApplication::instance()),
423                 SIGNAL(focusChanged(QWidget*, QWidget*)),
424                 this, SLOT(on_focus_changed()));
425 }
426
427 void MainWindow::save_ui_settings()
428 {
429         QSettings settings;
430         int id = 0;
431
432         settings.beginGroup("MainWindow");
433         settings.setValue("state", saveState());
434         settings.setValue("geometry", saveGeometry());
435         settings.endGroup();
436
437         for (shared_ptr<Session> session : sessions_) {
438                 // Ignore sessions using the demo device or no device at all
439                 if (session->device()) {
440                         shared_ptr<devices::HardwareDevice> device =
441                                 dynamic_pointer_cast< devices::HardwareDevice >
442                                 (session->device());
443
444                         if (device &&
445                                 device->hardware_device()->driver()->name() == "demo")
446                                 continue;
447
448                         settings.beginGroup("Session" + QString::number(id++));
449                         settings.remove("");  // Remove all keys in this group
450                         session->save_settings(settings);
451                         settings.endGroup();
452                 }
453         }
454
455         settings.setValue("sessions", id);
456 }
457
458 void MainWindow::restore_ui_settings()
459 {
460         QSettings settings;
461         int i, session_count;
462
463         settings.beginGroup("MainWindow");
464
465         if (settings.contains("geometry")) {
466                 restoreGeometry(settings.value("geometry").toByteArray());
467                 restoreState(settings.value("state").toByteArray());
468         } else
469                 resize(1000, 720);
470
471         settings.endGroup();
472
473         session_count = settings.value("sessions", 0).toInt();
474
475         for (i = 0; i < session_count; i++) {
476                 settings.beginGroup("Session" + QString::number(i));
477                 shared_ptr<Session> session = add_session();
478                 session->restore_settings(settings);
479                 settings.endGroup();
480         }
481 }
482
483 shared_ptr<Session> MainWindow::get_tab_session(int index) const
484 {
485         // Find the session that belongs to the tab's main window
486         for (auto entry : session_windows_)
487                 if (entry.second == session_selector_.widget(index))
488                         return entry.first;
489
490         return nullptr;
491 }
492
493 void MainWindow::closeEvent(QCloseEvent *event)
494 {
495         bool data_saved = true;
496
497         for (auto entry : session_windows_)
498                 if (!entry.first->data_saved())
499                         data_saved = false;
500
501         if (!data_saved && (QMessageBox::question(this, tr("Confirmation"),
502                 tr("There is unsaved data. Close anyway?"),
503                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::No)) {
504                 event->ignore();
505         } else {
506                 save_ui_settings();
507                 event->accept();
508         }
509 }
510
511 QMenu* MainWindow::createPopupMenu()
512 {
513         return nullptr;
514 }
515
516 bool MainWindow::restoreState(const QByteArray &state, int version)
517 {
518         (void)state;
519         (void)version;
520
521         // Do nothing. We don't want Qt to handle this, or else it
522         // will try to restore all the dock widgets and create havoc.
523
524         return false;
525 }
526
527 void MainWindow::session_error(const QString text, const QString info_text)
528 {
529         QMetaObject::invokeMethod(this, "show_session_error",
530                 Qt::QueuedConnection, Q_ARG(QString, text),
531                 Q_ARG(QString, info_text));
532 }
533
534 void MainWindow::show_session_error(const QString text, const QString info_text)
535 {
536         QMessageBox msg(this);
537         msg.setText(text);
538         msg.setInformativeText(info_text);
539         msg.setStandardButtons(QMessageBox::Ok);
540         msg.setIcon(QMessageBox::Warning);
541         msg.exec();
542 }
543
544 void MainWindow::on_add_view(const QString &title, views::ViewType type,
545         Session *session)
546 {
547         // We get a pointer and need a reference
548         for (shared_ptr<Session> s : sessions_)
549                 if (s.get() == session)
550                         add_view(title, type, *s);
551 }
552
553 void MainWindow::on_focus_changed()
554 {
555         shared_ptr<views::ViewBase> view = get_active_view();
556
557         if (view) {
558                 for (shared_ptr<Session> session : sessions_) {
559                         if (session->has_view(view)) {
560                                 if (session != last_focused_session_) {
561                                         // Activate correct tab if necessary
562                                         shared_ptr<Session> tab_session = get_tab_session(
563                                                 session_selector_.currentIndex());
564                                         if (tab_session != session)
565                                                 session_selector_.setCurrentWidget(
566                                                         session_windows_.at(session));
567
568                                         on_focused_session_changed(session);
569                                 }
570
571                                 break;
572                         }
573                 }
574         }
575
576         if (sessions_.empty())
577                 setWindowTitle(WindowTitle);
578 }
579
580 void MainWindow::on_focused_session_changed(shared_ptr<Session> session)
581 {
582         last_focused_session_ = session;
583
584         setWindowTitle(session->name() + " - " + WindowTitle);
585
586         // Update the state of the run/stop button, too
587         on_capture_state_changed(session.get());
588 }
589
590 void MainWindow::on_new_session_clicked()
591 {
592         add_session();
593 }
594
595 void MainWindow::on_run_stop_clicked()
596 {
597         shared_ptr<Session> session = last_focused_session_;
598
599         if (!session)
600                 return;
601
602         switch (session->get_capture_state()) {
603         case Session::Stopped:
604                 session->start_capture([&](QString message) {
605                         session_error("Capture failed", message); });
606                 break;
607         case Session::AwaitingTrigger:
608         case Session::Running:
609                 session->stop_capture();
610                 break;
611         }
612 }
613
614 void MainWindow::on_settings_clicked()
615 {
616         dialogs::Settings dlg(device_manager_);
617         dlg.exec();
618 }
619
620 void MainWindow::on_session_name_changed()
621 {
622         // Update the corresponding dock widget's name(s)
623         Session *session = qobject_cast<Session*>(QObject::sender());
624         assert(session);
625
626         for (shared_ptr<views::ViewBase> view : session->views()) {
627                 // Get the dock that contains the view
628                 for (auto entry : view_docks_)
629                         if (entry.second == view) {
630                                 entry.first->setObjectName(session->name());
631                                 entry.first->setWindowTitle(session->name());
632                         }
633         }
634
635         // Update the tab widget by finding the main window and the tab from that
636         for (auto entry : session_windows_)
637                 if (entry.first.get() == session) {
638                         QMainWindow *window = entry.second;
639                         const int index = session_selector_.indexOf(window);
640                         session_selector_.setTabText(index, session->name());
641                 }
642
643         // Refresh window title if the affected session has focus
644         if (session == last_focused_session_.get())
645                 setWindowTitle(session->name() + " - " + WindowTitle);
646 }
647
648 void MainWindow::on_capture_state_changed(QObject *obj)
649 {
650         Session *caller = qobject_cast<Session*>(obj);
651
652         // Ignore if caller is not the currently focused session
653         // unless there is only one session
654         if ((sessions_.size() > 1) && (caller != last_focused_session_.get()))
655                 return;
656
657         int state = caller->get_capture_state();
658
659         const QIcon *icons[] = {&icon_grey_, &icon_red_, &icon_green_};
660         run_stop_button_->setIcon(*icons[state]);
661         run_stop_button_->setText((state == pv::Session::Stopped) ?
662                 tr("Run") : tr("Stop"));
663 }
664
665 void MainWindow::on_new_view(Session *session)
666 {
667         // We get a pointer and need a reference
668         for (shared_ptr<Session> s : sessions_)
669                 if (s.get() == session)
670                         add_view(session->name(), views::ViewTypeTrace, *s);
671 }
672
673 void MainWindow::on_view_close_clicked()
674 {
675         // Find the dock widget that contains the close button that was clicked
676         QObject *w = QObject::sender();
677         QDockWidget *dock = nullptr;
678
679         while (w) {
680             dock = qobject_cast<QDockWidget*>(w);
681             if (dock)
682                 break;
683             w = w->parent();
684         }
685
686         // Get the view contained in the dock widget
687         shared_ptr<views::ViewBase> view;
688
689         for (auto entry : view_docks_)
690                 if (entry.first == dock)
691                         view = entry.second;
692
693         // Deregister the view
694         for (shared_ptr<Session> session : sessions_) {
695                 if (!session->has_view(view))
696                         continue;
697
698                 // Also destroy the entire session if its main view is closing...
699                 if (view == session->main_view()) {
700                         // ...but only if data is saved or the user confirms closing
701                         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
702                                 tr("This session contains unsaved data. Close it anyway?"),
703                                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
704                                 remove_session(session);
705                         break;
706                 } else
707                         // All other views can be closed at any time as no data will be lost
708                         remove_view(view);
709         }
710 }
711
712 void MainWindow::on_tab_changed(int index)
713 {
714         shared_ptr<Session> session = get_tab_session(index);
715
716         if (session)
717                 on_focused_session_changed(session);
718 }
719
720 void MainWindow::on_tab_close_requested(int index)
721 {
722         shared_ptr<Session> session = get_tab_session(index);
723
724         assert(session);
725
726         if (session->data_saved() || (QMessageBox::question(this, tr("Confirmation"),
727                 tr("This session contains unsaved data. Close it anyway?"),
728                 QMessageBox::Yes | QMessageBox::No) == QMessageBox::Yes))
729                 remove_session(session);
730 }
731
732 void MainWindow::on_view_coloured_bg_shortcut()
733 {
734         GlobalSettings settings;
735
736         bool state = settings.value(GlobalSettings::Key_View_ColouredBG).toBool();
737         settings.setValue(GlobalSettings::Key_View_ColouredBG, !state);
738 }
739
740 void MainWindow::on_view_sticky_scrolling_shortcut()
741 {
742         GlobalSettings settings;
743
744         bool state = settings.value(GlobalSettings::Key_View_StickyScrolling).toBool();
745         settings.setValue(GlobalSettings::Key_View_StickyScrolling, !state);
746 }
747
748 void MainWindow::on_view_show_sampling_points_shortcut()
749 {
750         GlobalSettings settings;
751
752         bool state = settings.value(GlobalSettings::Key_View_ShowSamplingPoints).toBool();
753         settings.setValue(GlobalSettings::Key_View_ShowSamplingPoints, !state);
754 }
755
756 void MainWindow::on_view_show_analog_minor_grid_shortcut()
757 {
758         GlobalSettings settings;
759
760         bool state = settings.value(GlobalSettings::Key_View_ShowAnalogMinorGrid).toBool();
761         settings.setValue(GlobalSettings::Key_View_ShowAnalogMinorGrid, !state);
762 }
763
764 void MainWindow::on_settingViewColouredBg_changed(const QVariant new_value)
765 {
766         bool state = new_value.toBool();
767
768         for (auto entry : view_docks_) {
769                 shared_ptr<views::ViewBase> viewbase = entry.second;
770
771                 // Only trace views have this setting
772                 views::TraceView::View* view =
773                                 qobject_cast<views::TraceView::View*>(viewbase.get());
774                 if (view)
775                         view->enable_coloured_bg(state);
776         }
777 }
778
779 void MainWindow::on_settingViewShowSamplingPoints_changed(const QVariant new_value)
780 {
781         bool state = new_value.toBool();
782
783         for (auto entry : view_docks_) {
784                 shared_ptr<views::ViewBase> viewbase = entry.second;
785
786                 // Only trace views have this setting
787                 views::TraceView::View* view =
788                                 qobject_cast<views::TraceView::View*>(viewbase.get());
789                 if (view)
790                         view->enable_show_sampling_points(state);
791         }
792 }
793
794 void MainWindow::on_settingViewShowAnalogMinorGrid_changed(const QVariant new_value)
795 {
796         bool state = new_value.toBool();
797
798         for (auto entry : view_docks_) {
799                 shared_ptr<views::ViewBase> viewbase = entry.second;
800
801                 // Only trace views have this setting
802                 views::TraceView::View* view =
803                                 qobject_cast<views::TraceView::View*>(viewbase.get());
804                 if (view)
805                         view->enable_show_analog_minor_grid(state);
806         }
807 }
808
809 void MainWindow::on_close_current_tab()
810 {
811         int tab = session_selector_.currentIndex();
812
813         on_tab_close_requested(tab);
814 }
815
816 } // namespace pv