More signals to new syntax

Now I'v discovered a Slot that returns a bool, this is not very
good because Qt expects a slot to have the same return type
as the signal, void, always.
Signed-off-by: Tomaz Canabrava <tomaz.canabrava@intel.com>

src/ui/MAVLinkSettingsWidget.cc

@@ -78,7 +78,7 @@ MAVLinkSettingsWidget::MAVLinkSettingsWidget(MAVLinkProtocol* protocol, QWidget
     connect(m_ui->systemIdSpinBox,static_cast<void (QSpinBox::*)(int)>(&QSpinBox::valueChanged), protocol, &MAVLinkProtocol::setSystemId);
     // Multiplexing
     connect(protocol, &MAVLinkProtocol::multiplexingChanged, m_ui->multiplexingCheckBox, &QCheckBox::setChecked);
-    connect(m_ui->multiplexingCheckBox, SIGNAL(toggled(bool)), protocol, SLOT(enableMultiplexing(bool)));
+    connect(m_ui->multiplexingCheckBox, &QCheckBox::toggled, protocol, &MAVLinkProtocol::enableMultiplexing);
     // Parameter guard
     connect(protocol, &MAVLinkProtocol::paramGuardChanged, m_ui->paramGuardCheckBox, &QCheckBox::setChecked);
     connect(m_ui->paramGuardCheckBox, &QCheckBox::toggled, protocol, &MAVLinkProtocol::enableParamGuard);

src/ui/MainWindow.cc

@@ -204,7 +204,7 @@ MainWindow::MainWindow()
     emit initStatusChanged(tr("Initializing 3D mouse interface"), Qt::AlignLeft | Qt::AlignBottom, QColor(62, 93, 141));
 
     mouse = new Mouse6dofInput(this);
-    connect(this, SIGNAL(x11EventOccured(XEvent*)), mouse, SLOT(handleX11Event(XEvent*)));
+    connect(this, &MainWindow::x11EventOccured, mouse, &Mouse6dofInput::handleX11Event);
 #endif //QGC_MOUSE_ENABLED_LINUX
 
     // Set low power mode
@@ -253,7 +253,7 @@ MainWindow::MainWindow()
 
     _ui.actionFlight->setChecked(true);
 
-    connect(&windowNameUpdateTimer, SIGNAL(timeout()), this, SLOT(configureWindowName()));
+    connect(&windowNameUpdateTimer, &QTimer::timeout, this, &MainWindow::configureWindowName);
     windowNameUpdateTimer.start(15000);
     emit initStatusChanged(tr("Done"), Qt::AlignLeft | Qt::AlignBottom, QColor(62, 93, 141));
 
@@ -302,8 +302,7 @@ void MainWindow::_buildCommonWidgets(void)
     // Add generic MAVLink decoder
     // TODO: This is never deleted
     mavlinkDecoder = new MAVLinkDecoder(qgcApp()->toolbox()->mavlinkProtocol(), this);
-    connect(mavlinkDecoder, SIGNAL(valueChanged(int,QString,QString,QVariant,quint64)),
-                      this, SIGNAL(valueChanged(int,QString,QString,QVariant,quint64)));
+    connect(mavlinkDecoder, &MAVLinkDecoder::valueChanged, this, &MainWindow::valueChanged);
 
     // Log player
     // TODO: Make this optional with a preferences setting or under a "View" menu
@@ -517,11 +516,11 @@ void MainWindow::connectCommonActions()
 {
     // Audio output
     _ui.actionMuteAudioOutput->setChecked(qgcApp()->toolbox()->audioOutput()->isMuted());
-    connect(qgcApp()->toolbox()->audioOutput(), SIGNAL(mutedChanged(bool)), _ui.actionMuteAudioOutput, SLOT(setChecked(bool)));
-    connect(_ui.actionMuteAudioOutput, SIGNAL(triggered(bool)), qgcApp()->toolbox()->audioOutput(), SLOT(mute(bool)));
+    connect(qgcApp()->toolbox()->audioOutput(), &GAudioOutput::mutedChanged, _ui.actionMuteAudioOutput, &QAction::setChecked);
+    connect(_ui.actionMuteAudioOutput, &QAction::triggered, qgcApp()->toolbox()->audioOutput(), &GAudioOutput::mute);
 
     // Application Settings
-    connect(_ui.actionSettings, SIGNAL(triggered()), this, SLOT(showSettings()));
+    connect(_ui.actionSettings, &QAction::triggered, this, &MainWindow::showSettings);
 
     // Views actions
     connect(_ui.actionFlight,   &QAction::triggered,    qgcApp(),   &QGCApplication::showFlyView);
@@ -561,7 +560,7 @@ void MainWindow::showSettings()
 
 void MainWindow::_vehicleAdded(Vehicle* vehicle)
 {
-    connect(vehicle->uas(), SIGNAL(valueChanged(int,QString,QString,QVariant,quint64)), this, SIGNAL(valueChanged(int,QString,QString,QVariant,quint64)));
+    connect(vehicle->uas(), &UAS::valueChanged, this, &MainWindow::valueChanged);
 }
 
 /// Stores the state of the toolbar, status bar and widgets associated with the current view

src/ui/QGCDataPlot2D.cc

@@ -62,16 +62,21 @@ QGCDataPlot2D::QGCDataPlot2D(QWidget *parent) :
     ui->gridCheckBox->setChecked(plot->gridEnabled());
 
     // Connect user actions
-    connect(ui->selectFileButton, SIGNAL(clicked()), this, SLOT(selectFile()));
-    connect(ui->saveCsvButton, SIGNAL(clicked()), this, SLOT(saveCsvLog()));
-    connect(ui->reloadButton, SIGNAL(clicked()), this, SLOT(reloadFile()));
-    connect(ui->savePlotButton, SIGNAL(clicked()), this, SLOT(savePlot()));
-    connect(ui->printButton, SIGNAL(clicked()), this, SLOT(print()));
-    connect(ui->legendCheckBox, SIGNAL(clicked(bool)), plot, SLOT(showLegend(bool)));
-    connect(ui->symmetricCheckBox, SIGNAL(clicked(bool)), plot, SLOT(setSymmetric(bool)));
-    connect(ui->gridCheckBox, SIGNAL(clicked(bool)), plot, SLOT(showGrid(bool)));
+    connect(ui->selectFileButton, &QPushButton::clicked, this, &QGCDataPlot2D::selectFile);
+    connect(ui->saveCsvButton, &QPushButton::clicked, this, &QGCDataPlot2D::saveCsvLog);
+    connect(ui->reloadButton, &QPushButton::clicked, this, &QGCDataPlot2D::reloadFile);
+    connect(ui->savePlotButton, &QPushButton::clicked, this, &QGCDataPlot2D::savePlot);
+    connect(ui->printButton, &QPushButton::clicked, this, &QGCDataPlot2D::print);
+    connect(ui->legendCheckBox, &QCheckBox::clicked, plot, &IncrementalPlot::showLegend);
+    connect(ui->symmetricCheckBox,&QCheckBox::clicked, plot, &IncrementalPlot::setSymmetric);
+    connect(ui->gridCheckBox, &QCheckBox::clicked, plot, &IncrementalPlot::showGrid);
+
+    connect(ui->style, static_cast<void (QComboBox::*)(const QString&)>(&QComboBox::currentIndexChanged),
+            plot, &IncrementalPlot::setStyleText);
+
+    //TODO: calculateRegression returns bool, slots are expected to return void, this makes
+    // converting to new style way too hard.
     connect(ui->regressionButton, SIGNAL(clicked()), this, SLOT(calculateRegression()));
-    connect(ui->style, SIGNAL(currentIndexChanged(QString)), plot, SLOT(setStyleText(QString)));
 
     // Allow style changes to propagate through this widget
     connect(qgcApp(), &QGCApplication::styleChanged, plot, &IncrementalPlot::styleChanged);
@@ -324,7 +329,7 @@ void QGCDataPlot2D::loadRawLog(QString file, QString xAxisName, QString yAxisFil
     // Postprocess log file
     logFile = new QTemporaryFile("qt_qgc_temp_log.XXXXXX.csv");
     compressor = new LogCompressor(file, logFile->fileName());
-    connect(compressor, SIGNAL(finishedFile(QString)), this, SLOT(loadFile(QString)));
+    connect(compressor, &LogCompressor::finishedFile, this, static_cast<void (QGCDataPlot2D::*)(QString)>(&QGCDataPlot2D::loadFile));
     compressor->startCompression();
 }