Add shortcuts to + and - buttons for zooming in and out horizontally
[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 <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