diff --git a/src/libkstapp/imagedialog.cpp b/src/libkstapp/imagedialog.cpp
@@ -38,24 +38,24 @@ ImageTab::ImageTab(QWidget *parent)
   setupUi(this);
   setTabTitle(tr("Image"));
 
-  connect(_realTimeAutoThreshold, SIGNAL(toggled(const bool&)), this, SLOT(realTimeAutoThresholdToggled(const bool&)));
-  connect(_colorOnly, SIGNAL(toggled(const bool&)), this, SLOT(updateEnabled(const bool&)));
-  connect(_colorAndContour, SIGNAL(toggled(const bool&)), this, SLOT(updateEnabled(const bool&)));
-  connect(_contourOnly, SIGNAL(toggled(const bool&)), this, SLOT(updateEnabled(const bool&)));
+  connect(_realTimeAutoThreshold, SIGNAL(toggled(bool)), this, SLOT(realTimeAutoThresholdToggled(bool)));
+  connect(_colorOnly, SIGNAL(toggled(bool)), this, SLOT(updateEnabled(bool)));
+  connect(_colorAndContour, SIGNAL(toggled(bool)), this, SLOT(updateEnabled(bool)));
+  connect(_contourOnly, SIGNAL(toggled(bool)), this, SLOT(updateEnabled(bool)));
   connect(_autoThreshold, SIGNAL(clicked()), this, SLOT(calculateAutoThreshold()));
   connect(_smartThreshold, SIGNAL(clicked()), this, SLOT(calculateSmartThreshold()));
 
   connect(_matrix, SIGNAL(selectionChanged()), this, SLOT(selectionChanged()));
 
   connect(_matrix, SIGNAL(selectionChanged()), this, SIGNAL(modified()));
-  connect(_colorOnly, SIGNAL(toggled(const bool&)), this, SIGNAL(modified()));
-  connect(_colorAndContour, SIGNAL(toggled(const bool&)), this, SIGNAL(modified()));
-  connect(_contourOnly, SIGNAL(toggled(const bool&)), this, SIGNAL(modified()));
-  connect(_lowerThreshold, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_upperThreshold, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_realTimeAutoThreshold, SIGNAL(toggled(const bool&)), this, SIGNAL(modified()));
-
-  connect(_contourColor, SIGNAL(changed(const QColor&)), this, SIGNAL(modified()));
+  connect(_colorOnly, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
+  connect(_colorAndContour, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
+  connect(_contourOnly, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
+  connect(_lowerThreshold, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_upperThreshold, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_realTimeAutoThreshold, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
+
+  connect(_contourColor, SIGNAL(changed(QColor)), this, SIGNAL(modified()));
   connect(_numContourLines, SIGNAL(valueChanged(int)), this, SIGNAL(modified()));
   connect(_contourWeight, SIGNAL(valueChanged(int)), this, SIGNAL(modified()));
   connect(_useVariableWeight, SIGNAL(clicked()), this, SIGNAL(modified()));

diff --git a/src/libkstapp/labelpropertiestab.cpp b/src/libkstapp/labelpropertiestab.cpp
@@ -50,7 +50,7 @@ LabelPropertiesTab::LabelPropertiesTab(QWidget *parent)
 
   connect(_labelText, SIGNAL(labelChanged()), this, SIGNAL(modified()));
   connect(_labelFontScale, SIGNAL(valueChanged(double)), this, SIGNAL(modified()));
-  connect(_labelColor, SIGNAL(changed(const QColor &)), this, SIGNAL(modified()));
+  connect(_labelColor, SIGNAL(changed(QColor)), this, SIGNAL(modified()));
   connect(_bold, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
   connect(_italic, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
   connect(_family, SIGNAL(currentIndexChanged(int)), this, SIGNAL(modified()));

diff --git a/src/libkstapp/labeltab.cpp b/src/libkstapp/labeltab.cpp
@@ -62,8 +62,8 @@ LabelTab::LabelTab(PlotItem* plotItem, QWidget *parent)
   connect(_globalLabelFontSize, SIGNAL(valueChanged(double)), this, SIGNAL(globalFontUpdate()));
   connect(_globalLabelBold, SIGNAL(toggled(bool)), this, SIGNAL(globalFontUpdate()));
   connect(_globalLabelItalic, SIGNAL(toggled(bool)), this, SIGNAL(globalFontUpdate()));
-  connect(_globalLabelFontFamily, SIGNAL(currentFontChanged(const QFont &)), this, SIGNAL(globalFontUpdate()));
-  connect(_globalLabelColor, SIGNAL(changed(const QColor &)), this, SIGNAL(globalFontUpdate()));
+  connect(_globalLabelFontFamily, SIGNAL(currentFontChanged(QFont)), this, SIGNAL(globalFontUpdate()));
+  connect(_globalLabelColor, SIGNAL(changed(QColor)), this, SIGNAL(globalFontUpdate()));
   connect(_globalLabelBold, SIGNAL(toggled(bool)), this, SLOT(buttonUpdate()));
   connect(_globalLabelItalic, SIGNAL(toggled(bool)), this, SLOT(buttonUpdate()));
 

diff --git a/src/libkstapp/legendtab.cpp b/src/libkstapp/legendtab.cpp
@@ -62,11 +62,11 @@ LegendTab::LegendTab(QWidget *parent)
   connect(_autoContents, SIGNAL(stateChanged(int)), this, SIGNAL(modified()));
   connect(_displayVertically, SIGNAL(stateChanged(int)), this, SIGNAL(modified()));
 
-  connect(_title, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
+  connect(_title, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
   connect(_fontSize, SIGNAL(valueChanged(double)), this, SIGNAL(modified()));
   connect(_bold, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
   connect(_italic, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
-  connect(_labelColor, SIGNAL(changed(const QColor &)), this, SIGNAL(modified()));
+  connect(_labelColor, SIGNAL(changed(QColor)), this, SIGNAL(modified()));
   connect(_family, SIGNAL(currentIndexChanged(int)), this, SIGNAL(modified()));
 
   _displayedRelationList->setSortingEnabled(false);

diff --git a/src/libkstapp/mainwindow.cpp b/src/libkstapp/mainwindow.cpp
@@ -1816,8 +1816,8 @@ void MainWindow::showDebugDialog() {
 void MainWindow::showExportGraphicsDialog() {
   if (!_exportGraphics) {
     _exportGraphics = new ExportGraphicsDialog(this);
-    connect(_exportGraphics, SIGNAL(exportGraphics(const QString &, const QString &, int, int, int)),
-            this, SLOT(exportGraphicsFile(const QString &, const QString &, int, int, int)));
+    connect(_exportGraphics, SIGNAL(exportGraphics(QString,QString,int,int,int)),
+            this, SLOT(exportGraphicsFile(QString,QString,int,int,int)));
   }
   if (_exportGraphics->isVisible()) {
     _exportGraphics->raise();
@@ -1917,7 +1917,7 @@ void MainWindow::showChangeDataSampleDialog() {
 
 void MainWindow::showDataWizard() {
   DataWizard *dataWizard = new DataWizard(this);
-  connect(dataWizard, SIGNAL(dataSourceLoaded(const QString&)), this, SLOT(updateRecentDataFiles(const QString&)));
+  connect(dataWizard, SIGNAL(dataSourceLoaded(QString)), this, SLOT(updateRecentDataFiles(QString)));
   dataWizard->show();
 }
 
@@ -1932,7 +1932,7 @@ void MainWindow::openRecentDataFile()
   QAction *action = qobject_cast<QAction *>(sender());
   if (action) {
     DataWizard *dataWizard = new DataWizard(this, action->data().toString());
-    connect(dataWizard, SIGNAL(dataSourceLoaded(const QString&)), this, SLOT(updateRecentDataFiles(const QString&)));
+    connect(dataWizard, SIGNAL(dataSourceLoaded(QString)), this, SLOT(updateRecentDataFiles(QString)));
     dataWizard->show();
   }
 }

diff --git a/src/libkstapp/markerstab.cpp b/src/libkstapp/markerstab.cpp
@@ -34,14 +34,14 @@ MarkersTab::MarkersTab(QWidget *parent)
   connect(_curveMarkers, SIGNAL(stateChanged(int)), this, SLOT(update()));
   connect(_vectorMarkers, SIGNAL(stateChanged(int)), this, SLOT(update()));
   connect(_currentMarkersList, SIGNAL(itemSelectionChanged()), this, SLOT(update()));
-  connect(_newMarker, SIGNAL(textChanged(const QString&)), this, SLOT(update()));
+  connect(_newMarker, SIGNAL(textChanged(QString)), this, SLOT(update()));
 
   connect(_markerLineStyle, SIGNAL(currentIndexChanged(int)), this, SIGNAL(modified()));
-  connect(_markerLineColor, SIGNAL(changed(const QColor &)), this, SIGNAL(modified()));
+  connect(_markerLineColor, SIGNAL(changed(QColor)), this, SIGNAL(modified()));
   connect(_curveMarkers, SIGNAL(stateChanged(int)), this, SIGNAL(modified()));
   connect(_vectorMarkers, SIGNAL(stateChanged(int)), this, SIGNAL(modified()));
-  connect(_vector, SIGNAL(selectionChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_curve, SIGNAL(selectionChanged(const QString&)), this, SIGNAL(modified()));
+  connect(_vector, SIGNAL(selectionChanged(QString)), this, SIGNAL(modified()));
+  connect(_curve, SIGNAL(selectionChanged(QString)), this, SIGNAL(modified()));
   connect(_risingEdge, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
   connect(_fallingEdge, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
   connect(_both, SIGNAL(toggled(bool)), this, SIGNAL(modified()));

diff --git a/src/libkstapp/matrixdialog.cpp b/src/libkstapp/matrixdialog.cpp
@@ -44,7 +44,7 @@ MatrixTab::MatrixTab(ObjectStore *store, QWidget *parent)
   setTabTitle(tr("Matrix"));
 
   connect(_readFromSource, SIGNAL(toggled(bool)), this, SLOT(readFromSourceChanged()));
-  connect(_fileName, SIGNAL(changed(const QString &)), this, SLOT(fileNameChanged(const QString &)));
+  connect(_fileName, SIGNAL(changed(QString)), this, SLOT(fileNameChanged(QString)));
   connect(_configure, SIGNAL(clicked()), this, SLOT(showConfigWidget()));
 
   connect(_xStartCountFromEnd, SIGNAL(clicked()), this, SLOT(xStartCountFromEndClicked()));
@@ -63,12 +63,12 @@ MatrixTab::MatrixTab(ObjectStore *store, QWidget *parent)
   connect(_skip, SIGNAL(valueChanged(int)), this, SIGNAL(modified()));
   connect(_nX, SIGNAL(valueChanged(int)), this, SIGNAL(modified()));
   connect(_nY, SIGNAL(valueChanged(int)), this, SIGNAL(modified()));
-  connect(_gradientZAtMin, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_gradientZAtMax, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_minX, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_minY, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_xStep, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_yStep, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
+  connect(_gradientZAtMin, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_gradientZAtMax, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_minX, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_minY, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_xStep, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_yStep, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
   connect(_xStartCountFromEnd, SIGNAL(clicked()), this, SIGNAL(modified()));
   connect(_yStartCountFromEnd, SIGNAL(clicked()), this, SIGNAL(modified()));
   connect(_xNumStepsReadToEnd, SIGNAL(clicked()), this, SIGNAL(modified()));
@@ -565,7 +565,7 @@ void MatrixTab::fileNameChanged(const QString &file) {
 
   _requestID += 1;
   ValidateDataSourceThread *validateDSThread = new ValidateDataSourceThread(file, _requestID);
-  connect(validateDSThread, SIGNAL(dataSourceValid(QString, int)), this, SLOT(sourceValid(QString, int)));
+  connect(validateDSThread, SIGNAL(dataSourceValid(QString,int)), this, SLOT(sourceValid(QString,int)));
   validating = true;
   QThreadPool::globalInstance()->start(validateDSThread);
 }

diff --git a/src/libkstapp/overridelabeltab.cpp b/src/libkstapp/overridelabeltab.cpp
@@ -36,7 +36,7 @@ OverrideLabelTab::OverrideLabelTab(QString title, QWidget *parent)
   connect(_bold, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
   connect(_italic, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
   connect(_family, SIGNAL(currentIndexChanged(int)), this, SIGNAL(modified()));
-  connect(_labelColor, SIGNAL(changed(const QColor &)), this, SIGNAL(modified()));
+  connect(_labelColor, SIGNAL(changed(QColor)), this, SIGNAL(modified()));
   connect(_useDefault, SIGNAL(toggled(bool)), this, SIGNAL(useDefaultChanged(bool)));
 
   connect(_bold, SIGNAL(toggled(bool)), this, SLOT(buttonUpdate()));

diff --git a/src/libkstapp/rangetab.cpp b/src/libkstapp/rangetab.cpp
@@ -37,13 +37,13 @@ RangeTab::RangeTab(PlotItem* plotItem, QWidget *parent)
   connect(_ySpike, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
   connect(_yFixed, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
 
-  connect(_xMin, SIGNAL(textChanged(const QString &)), this, SIGNAL(modified()));
-  connect(_xMax, SIGNAL(textChanged(const QString &)), this, SIGNAL(modified()));
-  connect(_xRange, SIGNAL(textChanged(const QString &)), this, SIGNAL(modified()));
+  connect(_xMin, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_xMax, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_xRange, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
 
-  connect(_yMin, SIGNAL(textChanged(const QString &)), this, SIGNAL(modified()));
-  connect(_yMax, SIGNAL(textChanged(const QString &)), this, SIGNAL(modified()));
-  connect(_yRange, SIGNAL(textChanged(const QString &)), this, SIGNAL(modified()));
+  connect(_yMin, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_yMax, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_yRange, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
 
   connect(this, SIGNAL(modified()), this, SLOT(updateButtons()));
 

diff --git a/src/libkstapp/scalardialog.cpp b/src/libkstapp/scalardialog.cpp
@@ -36,14 +36,14 @@ ScalarTab::ScalarTab(ObjectStore *store, QWidget *parent)
 
   setDataOptions();
 
-  connect(_scalarValue, SIGNAL(textChanged(const QString&)), this, SLOT(entryChanged()));
+  connect(_scalarValue, SIGNAL(textChanged(QString)), this, SLOT(entryChanged()));
   connect(_start, SIGNAL(valueChanged(int)), this, SLOT(entryChanged()));
   connect(_countFromEnd, SIGNAL(clicked()), this, SLOT(entryChanged()));
-  connect(_field, SIGNAL(editTextChanged(const QString&)), this, SLOT(entryChanged()));
-  connect(_fieldRV, SIGNAL(editTextChanged(const QString&)), this, SLOT(entryChanged()));
+  connect(_field, SIGNAL(editTextChanged(QString)), this, SLOT(entryChanged()));
+  connect(_fieldRV, SIGNAL(editTextChanged(QString)), this, SLOT(entryChanged()));
   connect(_readFromSource, SIGNAL(toggled(bool)), this, SLOT(readFromSourceChanged()));
   connect(_readFromRVector, SIGNAL(toggled(bool)), this, SLOT(readFromSourceChanged()));
-  connect(_fileName, SIGNAL(changed(const QString &)), this, SLOT(fileNameChanged(const QString &)));
+  connect(_fileName, SIGNAL(changed(QString)), this, SLOT(fileNameChanged(QString)));
   connect(_configure, SIGNAL(clicked()), this, SLOT(showConfigWidget()));
 }
 
@@ -222,7 +222,7 @@ void ScalarTab::fileNameChanged(const QString &file) {
 
   _requestID += 1;
   ValidateDataSourceThread *validateDSThread = new ValidateDataSourceThread(file, _requestID);
-  connect(validateDSThread, SIGNAL(dataSourceValid(QString, int)), this, SLOT(sourceValid(QString, int)));
+  connect(validateDSThread, SIGNAL(dataSourceValid(QString,int)), this, SLOT(sourceValid(QString,int)));
   QThreadPool::globalInstance()->start(validateDSThread);
 }
 

diff --git a/src/libkstapp/stringdialog.cpp b/src/libkstapp/stringdialog.cpp
@@ -35,8 +35,8 @@ StringTab::StringTab(ObjectStore *store, QWidget *parent)
 
   connect(_generatedStringGroup, SIGNAL(toggled(bool)), this, SLOT(generateClicked()));
   connect(_dataStringGroup, SIGNAL(toggled(bool)), this, SLOT(readFromSourceClicked()));
-  connect(_stringValue, SIGNAL(textChanged(const QString&)), this, SLOT(textChanged()));
-  connect(_fileName, SIGNAL(changed(const QString &)), this, SLOT(fileNameChanged(const QString &)));
+  connect(_stringValue, SIGNAL(textChanged(QString)), this, SLOT(textChanged()));
+  connect(_fileName, SIGNAL(changed(QString)), this, SLOT(fileNameChanged(QString)));
   connect(_configure, SIGNAL(clicked()), this, SLOT(showConfigWidget()));
 }
 
@@ -180,7 +180,7 @@ void StringTab::fileNameChanged(const QString &file) {
 
   _requestID += 1;
   ValidateDataSourceThread *validateDSThread = new ValidateDataSourceThread(file, _requestID);
-  connect(validateDSThread, SIGNAL(dataSourceValid(QString, int)), this, SLOT(sourceValid(QString, int)));
+  connect(validateDSThread, SIGNAL(dataSourceValid(QString,int)), this, SLOT(sourceValid(QString,int)));
   QThreadPool::globalInstance()->start(validateDSThread);
 }
 

diff --git a/src/libkstapp/stroketab.cpp b/src/libkstapp/stroketab.cpp
@@ -55,7 +55,7 @@ StrokeTab::StrokeTab(QWidget *parent)
 
   connect(_style, SIGNAL(currentIndexChanged(int)), this, SIGNAL(modified()));
   connect(_width, SIGNAL(valueChanged(double)), this, SIGNAL(modified()));
-  connect(_brushColor, SIGNAL(changed(const QColor &)), this, SIGNAL(modified()));
+  connect(_brushColor, SIGNAL(changed(QColor)), this, SIGNAL(modified()));
   connect(_brushStyle, SIGNAL(currentIndexChanged(int)), this, SIGNAL(modified()));
   connect(_joinStyle, SIGNAL(currentIndexChanged(int)), this, SIGNAL(modified()));
   connect(_capStyle, SIGNAL(currentIndexChanged(int)), this, SIGNAL(modified()));

diff --git a/src/libkstapp/tabwidget.cpp b/src/libkstapp/tabwidget.cpp
@@ -71,7 +71,7 @@ TabWidget::TabWidget(QWidget *parent)
 : QTabWidget(parent) {
   setTabBar(new TabBar);
   tabBar()->setContextMenuPolicy(Qt::CustomContextMenu);
-  connect(tabBar(), SIGNAL(customContextMenuRequested(const QPoint&)), this, SLOT(contextMenu(const QPoint&)));
+  connect(tabBar(), SIGNAL(customContextMenuRequested(QPoint)), this, SLOT(contextMenu(QPoint)));
   _cnt = 0;
 #if QT_VERSION >= 0x040500
   tabBar()->setMovable(true);

diff --git a/src/libkstapp/themedialog.cpp b/src/libkstapp/themedialog.cpp
@@ -49,8 +49,8 @@ ThemeDialog::ThemeDialog(QWidget *parent) : QDialog(parent) {
   vbox2->addWidget(_strokeTab);
   _strokeBox->setLayout(vbox2);
 
-  connect(_buttonBox, SIGNAL(clicked(QAbstractButton *)),
-          this, SLOT(buttonClicked(QAbstractButton *)));
+  connect(_buttonBox, SIGNAL(clicked(QAbstractButton*)),
+          this, SLOT(buttonClicked(QAbstractButton*)));
 
   _bold->setFixedWidth(32);
   _bold->setFixedHeight(32);

diff --git a/src/libkstapp/vectordialog.cpp b/src/libkstapp/vectordialog.cpp
@@ -39,14 +39,14 @@ VectorTab::VectorTab(ObjectStore *store, QWidget *parent)
 
   connect(_generatedVectorGroup, SIGNAL(clicked(bool)), this, SLOT(generateClicked()));
   connect(_dataVectorGroup, SIGNAL(clicked(bool)), this, SLOT(readFromSourceClicked()));
-  connect(_fileName, SIGNAL(changed(const QString &)), this, SLOT(fileNameChanged(const QString &)));
+  connect(_fileName, SIGNAL(changed(QString)), this, SLOT(fileNameChanged(QString)));
   connect(_configure, SIGNAL(clicked()), this, SLOT(showConfigWidget()));
-  connect(_field, SIGNAL(editTextChanged(const QString &)), this, SIGNAL(fieldChanged()));
+  connect(_field, SIGNAL(editTextChanged(QString)), this, SIGNAL(fieldChanged()));
 
   connect(_dataRange, SIGNAL(modified()), this, SIGNAL(modified()));
   connect(_numberOfSamples, SIGNAL(valueChanged(int)), this, SIGNAL(modified()));
-  connect(_from, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_to, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
+  connect(_from, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_to, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
 
   // embed data range in the data source box
   _dataRange->groupBox2->setFlat(true);
@@ -303,7 +303,7 @@ void VectorTab::fileNameChanged(const QString &file) {
 
   _requestID += 1;
   ValidateDataSourceThread *validateDSThread = new ValidateDataSourceThread(file, _requestID);
-  connect(validateDSThread, SIGNAL(dataSourceValid(QString, int)), this, SLOT(sourceValid(QString, int)));
+  connect(validateDSThread, SIGNAL(dataSourceValid(QString,int)), this, SLOT(sourceValid(QString,int)));
   validating = true;
   QThreadPool::globalInstance()->start(validateDSThread);
 }
@@ -467,7 +467,7 @@ ObjectPtr VectorDialog::createNewDataVector() {
   if (!dataSource)
     return 0;
 
-  connect(dataSource, SIGNAL(progress(int, QString)), kstApp->mainWindow(), SLOT(updateProgress(int, QString)));
+  connect(dataSource, SIGNAL(progress(int,QString)), kstApp->mainWindow(), SLOT(updateProgress(int,QString)));
 
   const QString field = _vectorTab->field();
   const DataRange *dataRange = _vectorTab->dataRange();

diff --git a/src/libkstapp/viewvectordialog.cpp b/src/libkstapp/viewvectordialog.cpp
@@ -45,8 +45,8 @@ ViewVectorDialog::ViewVectorDialog(QWidget *parent, Document *doc)
 
   // Custom context menu for the remove action and display format
   setContextMenuPolicy(Qt::CustomContextMenu);
-  connect(this, SIGNAL(customContextMenuRequested(const QPoint&)),
-          this, SLOT(contextMenu(const QPoint&)));
+  connect(this, SIGNAL(customContextMenuRequested(QPoint)),
+          this, SLOT(contextMenu(QPoint)));
 
   connect(_resetButton, SIGNAL(clicked()), this, SLOT(reset()));
 

diff --git a/src/widgets/colorpalette.cpp b/src/widgets/colorpalette.cpp
@@ -23,8 +23,8 @@ ColorPalette::ColorPalette(QWidget *parent)
     : QWidget(parent) {
   setupUi(this);
 
-  connect(_palette, SIGNAL(highlighted(const QString&)), this, SLOT(updatePalette(const QString&)));
-  connect(_palette, SIGNAL(currentIndexChanged(const QString&)), this, SLOT(updatePalette(const QString&)));
+  connect(_palette, SIGNAL(highlighted(QString)), this, SLOT(updatePalette(QString)));
+  connect(_palette, SIGNAL(currentIndexChanged(QString)), this, SLOT(updatePalette(QString)));
   connect(_palette, SIGNAL(currentIndexChanged(int)), this, SIGNAL(selectionChanged()));
 
   refresh(DefaultPalette);

diff --git a/src/widgets/curveappearance.cpp b/src/widgets/curveappearance.cpp
@@ -33,14 +33,14 @@ CurveAppearance::CurveAppearance(QWidget *parent)
   connect(_showBars, SIGNAL(stateChanged(int)), this, SLOT(enableSettings()));
   connect(_showHead, SIGNAL(stateChanged(int)), this, SLOT(enableSettings()));
 
-  connect(_color, SIGNAL(changed(const QColor&)), this, SLOT(populateSymbolCombos()));
-  connect(_color, SIGNAL(changed(const QColor&)), this, SLOT(populateLineStyleCombo()));
-  connect(_headColor, SIGNAL(changed(const QColor&)), this, SLOT(populateSymbolCombos()));
-  connect(_headColor, SIGNAL(changed(const QColor&)), this, SLOT(populateLineStyleCombo()));
-
-  connect(_color, SIGNAL(changed(const QColor&)), this, SLOT(drawSampleLine()));
-  connect(_headColor, SIGNAL(changed(const QColor&)), this, SLOT(drawSampleLine()));
-  connect(_barFillColor, SIGNAL(changed(const QColor&)), this, SLOT(drawSampleLine()));
+  connect(_color, SIGNAL(changed(QColor)), this, SLOT(populateSymbolCombos()));
+  connect(_color, SIGNAL(changed(QColor)), this, SLOT(populateLineStyleCombo()));
+  connect(_headColor, SIGNAL(changed(QColor)), this, SLOT(populateSymbolCombos()));
+  connect(_headColor, SIGNAL(changed(QColor)), this, SLOT(populateLineStyleCombo()));
+
+  connect(_color, SIGNAL(changed(QColor)), this, SLOT(drawSampleLine()));
+  connect(_headColor, SIGNAL(changed(QColor)), this, SLOT(drawSampleLine()));
+  connect(_barFillColor, SIGNAL(changed(QColor)), this, SLOT(drawSampleLine()));
   connect(_showLines, SIGNAL(clicked()), this, SLOT(drawSampleLine()));
   connect(_showPoints, SIGNAL(clicked()), this, SLOT(drawSampleLine()));
   connect(_showHead, SIGNAL(clicked()), this, SLOT(drawSampleLine()));
@@ -51,9 +51,9 @@ CurveAppearance::CurveAppearance(QWidget *parent)
   connect(_spinBoxPointSize, SIGNAL(valueChanged(double)), this, SLOT(drawSampleLine()));
   connect(_showBars, SIGNAL(clicked()), this, SLOT(drawSampleLine()));
 
-  connect(_color, SIGNAL(changed(const QColor&)), this, SIGNAL(modified()));
-  connect(_headColor, SIGNAL(changed(const QColor&)), this, SIGNAL(modified()));
-  connect(_barFillColor, SIGNAL(changed(const QColor&)), this, SIGNAL(modified()));
+  connect(_color, SIGNAL(changed(QColor)), this, SIGNAL(modified()));
+  connect(_headColor, SIGNAL(changed(QColor)), this, SIGNAL(modified()));
+  connect(_barFillColor, SIGNAL(changed(QColor)), this, SIGNAL(modified()));
   connect(_showLines, SIGNAL(clicked()), this, SIGNAL(modified()));
   connect(_showPoints, SIGNAL(clicked()), this, SIGNAL(modified()));
   connect(_showHead, SIGNAL(clicked()), this, SIGNAL(modified()));

diff --git a/src/widgets/datarange.cpp b/src/widgets/datarange.cpp
@@ -23,8 +23,8 @@ DataRange::DataRange(QWidget *parent)
   connect(_readToEnd, SIGNAL(toggled(bool)), this, SLOT(readToEndChanged()));
   connect(_doSkip, SIGNAL(toggled(bool)), this, SLOT(doSkipChanged()));
 
-  connect(_start, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_range, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
+  connect(_start, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_range, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
   connect(_skip, SIGNAL(valueChanged(int)), this, SIGNAL(modified()));
   connect(_doFilter, SIGNAL(toggled(bool)), this, SIGNAL(modified()));
   connect(_countFromEnd, SIGNAL(toggled(bool)), this, SIGNAL(modified()));

diff --git a/src/widgets/datasourceselector.cpp b/src/widgets/datasourceselector.cpp
@@ -60,7 +60,7 @@ void DataSourceSelector::setup() {
 
   setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
   //connect (_fileEdit, SIGNAL(textChanged(const QString &)), this, SIGNAL(changed(const QString &)));
-  connect (_fileEdit, SIGNAL(textChanged(const QString &)), this, SLOT(updateFile(const QString &)));
+  connect (_fileEdit, SIGNAL(textChanged(QString)), this, SLOT(updateFile(QString)));
   connect (_fileButton, SIGNAL(clicked()), this, SLOT(chooseFile()));
 
   QFileSystemModel *dirModel = new QFileSystemModel;

diff --git a/src/widgets/datasourceselectordialog.cpp b/src/widgets/datasourceselectordialog.cpp
@@ -27,7 +27,7 @@ DataSourceSelectorDialog::DataSourceSelectorDialog(QString &file, QWidget *paren
   selectFile(file);
   currentChanged(file);
 
-  connect(this, SIGNAL(currentChanged(const QString &)), this, SLOT(currentChanged(const QString &)));
+  connect(this, SIGNAL(currentChanged(QString)), this, SLOT(currentChanged(QString)));
 }
 
 

diff --git a/src/widgets/fftoptions.cpp b/src/widgets/fftoptions.cpp
@@ -31,9 +31,9 @@ FFTOptions::FFTOptions(QWidget *parent)
   connect(_removeMean, SIGNAL(clicked()), this, SIGNAL(modified()));
   connect(_interleavedAverage, SIGNAL(clicked()), this, SIGNAL(modified()));
   connect(_interpolateOverHoles, SIGNAL(clicked()), this, SIGNAL(modified()));
-  connect(_sampleRate, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_vectorUnits, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
-  connect(_rateUnits, SIGNAL(textChanged(const QString&)), this, SIGNAL(modified()));
+  connect(_sampleRate, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_vectorUnits, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
+  connect(_rateUnits, SIGNAL(textChanged(QString)), this, SIGNAL(modified()));
   connect(_sigma, SIGNAL(valueChanged(double)), this, SIGNAL(modified()));
   connect(_FFTLength, SIGNAL(valueChanged(int)), this, SIGNAL(modified()));
 

diff --git a/src/widgets/filerequester.cpp b/src/widgets/filerequester.cpp
@@ -49,7 +49,7 @@ void FileRequester::setup() {
   _fileButton->setFixedSize(size + 8, size + 8);
 
   setSizePolicy(QSizePolicy::Preferred, QSizePolicy::Fixed);
-  connect (_fileEdit, SIGNAL(textChanged(const QString &)), this, SLOT(updateFile(const QString &)));
+  connect (_fileEdit, SIGNAL(textChanged(QString)), this, SLOT(updateFile(QString)));
   connect (_fileButton, SIGNAL(clicked()), this, SLOT(chooseFile()));
 
   QFileSystemModel *dirModel = new QFileSystemModel(this);

diff --git a/src/widgets/scalarlistselector.cpp b/src/widgets/scalarlistselector.cpp
@@ -21,7 +21,7 @@ ScalarListSelector::ScalarListSelector(QWidget *parent)
   connect(buttonBox, SIGNAL(accepted()), this, SLOT(accept()));
   connect(buttonBox, SIGNAL(rejected()), this, SLOT(reject()));
 
-  connect(_search, SIGNAL(textChanged(QString)), this, SLOT(filter(const QString&)));
+  connect(_search, SIGNAL(textChanged(QString)), this, SLOT(filter(QString)));
 }