diff --git a/src/app/tape/dialogs/configpages/tapeconfigurationpage.h b/src/app/tape/dialogs/configpages/tapeconfigurationpage.h
index c27e15ec4..e3bb02c2d 100644
--- a/src/app/tape/dialogs/configpages/tapeconfigurationpage.h
+++ b/src/app/tape/dialogs/configpages/tapeconfigurationpage.h
@@ -42,7 +42,7 @@ class TapeConfigurationPage : public QWidget
 {
     Q_OBJECT
 public:
-    TapeConfigurationPage(QWidget *parent = nullptr);
+    explicit TapeConfigurationPage(QWidget *parent = nullptr);
     void      Apply();
 public slots:
     void      LangChanged();
diff --git a/src/app/tape/dialogs/configpages/tapepathpage.h b/src/app/tape/dialogs/configpages/tapepathpage.h
index a129e841f..5d9930f21 100644
--- a/src/app/tape/dialogs/configpages/tapepathpage.h
+++ b/src/app/tape/dialogs/configpages/tapepathpage.h
@@ -40,7 +40,7 @@ class TapePathPage : public QWidget
 {
     Q_OBJECT
 public:
-    TapePathPage(QWidget *parent = nullptr);
+    explicit TapePathPage(QWidget *parent = nullptr);
     void      Apply();
 public slots:
     void TableActivated();
diff --git a/src/app/tape/mapplication.cpp b/src/app/tape/mapplication.cpp
index 55d14480f..d24076928 100644
--- a/src/app/tape/mapplication.cpp
+++ b/src/app/tape/mapplication.cpp
@@ -183,6 +183,7 @@ inline void noisyFailureMsgHandler(QtMsgType type, const QMessageLogContext &con
 }
 
 //---------------------------------------------------------------------------------------------------------------------
+// cppcheck-suppress uninitMemberVar
 MApplication::MApplication(int &argc, char **argv)
     :VAbstractApplication(argc, argv),
       mainWindows(),
diff --git a/src/app/tape/vlitepattern.h b/src/app/tape/vlitepattern.h
index a540eb327..170178298 100644
--- a/src/app/tape/vlitepattern.h
+++ b/src/app/tape/vlitepattern.h
@@ -35,7 +35,7 @@ class VLitePattern : public VAbstractPattern
 {
     Q_OBJECT
 public:
-    VLitePattern(QObject *parent = nullptr);
+    explicit VLitePattern(QObject *parent = nullptr);
 
     virtual void    CreateEmptyFile() Q_DECL_OVERRIDE;
 
diff --git a/src/app/tape/vtablesearch.h b/src/app/tape/vtablesearch.h
index 187f5571d..9f42a5f8e 100644
--- a/src/app/tape/vtablesearch.h
+++ b/src/app/tape/vtablesearch.h
@@ -35,7 +35,7 @@
 class VTableSearch
 {
 public:
-    VTableSearch(QTableWidget *table);
+    explicit VTableSearch(QTableWidget *table);
 
     void Find(const QString &term);
     void FindPrevious();
diff --git a/src/app/valentina/core/vapplication.cpp b/src/app/valentina/core/vapplication.cpp
index c5a112395..cad9af09f 100644
--- a/src/app/valentina/core/vapplication.cpp
+++ b/src/app/valentina/core/vapplication.cpp
@@ -581,7 +581,9 @@ QStringList VApplication::LabelLanguages()
 void VApplication::StartLogging()
 {
     CreateLogDir();
+    // cppcheck-suppress leakReturnValNotUsed
     BeginLogging();
+    // cppcheck-suppress leakReturnValNotUsed
     ClearOldLogs();
 #if defined(Q_OS_WIN) && defined(Q_CC_GNU)
     ClearOldReports();
@@ -786,6 +788,7 @@ void VApplication::CollectReport(const QString &reportName) const
     reportFile.remove(); // Clear after yourself
 
     filename = QString("%1/reports/log-%2.log").arg(qApp->applicationDirPath()).arg(timestamp);
+    // cppcheck-suppress leakReturnValNotUsed
     GatherLogs();
     QFile logFile(QString("%1/valentina.log").arg(LogDirPath()));
     logFile.copy(filename); // Collect log
@@ -849,6 +852,7 @@ void VApplication::SendReport(const QString &reportName) const
     content.append(QString("\r\n-------------------------------\r\n"));
     content.append(QString("Log:")+"\r\n");
 
+    // cppcheck-suppress leakReturnValNotUsed
     GatherLogs();
     QFile logFile(QString("%1/valentina.log").arg(LogDirPath()));
     if (logFile.open(QIODevice::ReadOnly | QIODevice::Text))
diff --git a/src/app/valentina/core/vformulaproperty.h b/src/app/valentina/core/vformulaproperty.h
index b5ca10648..73eb251b7 100644
--- a/src/app/valentina/core/vformulaproperty.h
+++ b/src/app/valentina/core/vformulaproperty.h
@@ -37,7 +37,7 @@ class VFormulaProperty : public VPE::VProperty
 {
     Q_OBJECT
 public:
-    VFormulaProperty(const QString &name);
+    explicit VFormulaProperty(const QString &name);
 
     //! Get the data how it should be displayed
     virtual QVariant data (int column = DPC_Name, int role = Qt::DisplayRole) const Q_DECL_OVERRIDE;
diff --git a/src/app/valentina/core/vformulapropertyeditor.h b/src/app/valentina/core/vformulapropertyeditor.h
index 2f9d73064..062d5b380 100644
--- a/src/app/valentina/core/vformulapropertyeditor.h
+++ b/src/app/valentina/core/vformulapropertyeditor.h
@@ -43,7 +43,7 @@ class VFormulaPropertyEditor : public QWidget
 
 public:
     //! Constructor taking a widget as parent
-    VFormulaPropertyEditor(QWidget *parent);
+    explicit VFormulaPropertyEditor(QWidget *parent);
 
     //! Destructor
     virtual ~VFormulaPropertyEditor() Q_DECL_OVERRIDE;
diff --git a/src/app/valentina/core/vtooloptionspropertybrowser.h b/src/app/valentina/core/vtooloptionspropertybrowser.h
index 71c7e8f2d..cba5aef90 100644
--- a/src/app/valentina/core/vtooloptionspropertybrowser.h
+++ b/src/app/valentina/core/vtooloptionspropertybrowser.h
@@ -45,7 +45,7 @@ class VToolOptionsPropertyBrowser : public QObject
 {
     Q_OBJECT
 public:
-    VToolOptionsPropertyBrowser(QDockWidget *parent);
+    explicit VToolOptionsPropertyBrowser(QDockWidget *parent);
     void ClearPropertyBrowser();
 public slots:
     void itemClicked(QGraphicsItem *item);
diff --git a/src/app/valentina/dialogs/configpages/communitypage.h b/src/app/valentina/dialogs/configpages/communitypage.h
index 532b0e520..8d98bf75f 100644
--- a/src/app/valentina/dialogs/configpages/communitypage.h
+++ b/src/app/valentina/dialogs/configpages/communitypage.h
@@ -41,7 +41,7 @@ class CommunityPage : public QWidget
 {
     Q_OBJECT
 public:
-    CommunityPage(QWidget *parent = nullptr);
+    explicit CommunityPage(QWidget *parent = nullptr);
     void      Apply();
 private:
     Q_DISABLE_COPY(CommunityPage)
diff --git a/src/app/valentina/dialogs/configpages/configurationpage.h b/src/app/valentina/dialogs/configpages/configurationpage.h
index 8fdedf410..3b79b97c2 100644
--- a/src/app/valentina/dialogs/configpages/configurationpage.h
+++ b/src/app/valentina/dialogs/configpages/configurationpage.h
@@ -41,7 +41,7 @@ class ConfigurationPage : public QWidget
 {
     Q_OBJECT
 public:
-    ConfigurationPage(QWidget *parent = nullptr);
+    explicit ConfigurationPage(QWidget *parent = nullptr);
     void      Apply();
 public slots:
     void      LangChanged();
diff --git a/src/app/valentina/dialogs/configpages/pathpage.h b/src/app/valentina/dialogs/configpages/pathpage.h
index f81c14b36..f050baf01 100644
--- a/src/app/valentina/dialogs/configpages/pathpage.h
+++ b/src/app/valentina/dialogs/configpages/pathpage.h
@@ -40,7 +40,7 @@ class PathPage : public QWidget
 {
     Q_OBJECT
 public:
-    PathPage(QWidget *parent = nullptr);
+    explicit PathPage(QWidget *parent = nullptr);
     void      Apply();
 public slots:
     void TableActivated();
diff --git a/src/app/valentina/dialogs/configpages/patternpage.h b/src/app/valentina/dialogs/configpages/patternpage.h
index 2a7743b09..4af994927 100644
--- a/src/app/valentina/dialogs/configpages/patternpage.h
+++ b/src/app/valentina/dialogs/configpages/patternpage.h
@@ -41,7 +41,7 @@ class PatternPage : public QWidget
 {
     Q_OBJECT
 public:
-    PatternPage(QWidget *parent = nullptr);
+    explicit PatternPage(QWidget *parent = nullptr);
     void      Apply();
 private:
     Q_DISABLE_COPY(PatternPage)
diff --git a/src/app/valentina/mainwindowsnogui.h b/src/app/valentina/mainwindowsnogui.h
index c1d6f191b..5029db74d 100644
--- a/src/app/valentina/mainwindowsnogui.h
+++ b/src/app/valentina/mainwindowsnogui.h
@@ -46,7 +46,7 @@ class MainWindowsNoGUI : public QMainWindow
 {
     Q_OBJECT
 public:
-    MainWindowsNoGUI(QWidget *parent = nullptr);
+    explicit MainWindowsNoGUI(QWidget *parent = nullptr);
     virtual ~MainWindowsNoGUI() Q_DECL_OVERRIDE;
 
 public slots:
diff --git a/src/app/valentina/xml/vpattern.cpp b/src/app/valentina/xml/vpattern.cpp
index eab12d6c5..a5483e17d 100644
--- a/src/app/valentina/xml/vpattern.cpp
+++ b/src/app/valentina/xml/vpattern.cpp
@@ -906,14 +906,14 @@ void VPattern::ParseToolBasePoint(VMainGraphicsScene *scene, const QDomElement &
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     VToolBasePoint *spoint = 0;
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const qreal x = qApp->toPixel(GetParametrDouble(domElement, AttrX, "10.0"));
         const qreal y = qApp->toPixel(GetParametrDouble(domElement, AttrY, "10.0"));
@@ -951,15 +951,15 @@ void VPattern::ParseToolEndLine(VMainGraphicsScene *scene, QDomElement &domEleme
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-    QString typeLine;
-    QString lineColor;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+        QString typeLine;
+        QString lineColor;
+
         PointsCommonAttributes(domElement, id, name, mx, my, typeLine, lineColor);
 
         const QString formula = GetParametrString(domElement, AttrLength, "100.0");
@@ -1000,15 +1000,15 @@ void VPattern::ParseToolAlongLine(VMainGraphicsScene *scene, QDomElement &domEle
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-    QString typeLine;
-    QString lineColor;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+        QString typeLine;
+        QString lineColor;
+
         PointsCommonAttributes(domElement, id, name, mx, my, typeLine, lineColor);
         const QString formula = GetParametrString(domElement, AttrLength, "100.0");
         QString f = formula;//need for saving fixed formula;
@@ -1044,15 +1044,15 @@ void VPattern::ParseToolShoulderPoint(VMainGraphicsScene *scene, QDomElement &do
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-    QString typeLine;
-    QString lineColor;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+        QString typeLine;
+        QString lineColor;
+
         PointsCommonAttributes(domElement, id, name, mx, my, typeLine, lineColor);
         const QString formula = GetParametrString(domElement, AttrLength, "100.0");
         QString f = formula;//need for saving fixed formula;
@@ -1089,15 +1089,15 @@ void VPattern::ParseToolNormal(VMainGraphicsScene *scene, QDomElement &domElemen
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-    QString typeLine;
-    QString lineColor;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+        QString typeLine;
+        QString lineColor;
+
         PointsCommonAttributes(domElement, id, name, mx, my, typeLine, lineColor);
         const QString formula = GetParametrString(domElement, AttrLength, "100.0");
         QString f = formula;//need for saving fixed formula;
@@ -1134,15 +1134,15 @@ void VPattern::ParseToolBisector(VMainGraphicsScene *scene, QDomElement &domElem
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-    QString typeLine;
-    QString lineColor;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+        QString typeLine;
+        QString lineColor;
+
         PointsCommonAttributes(domElement, id, name, mx, my, typeLine, lineColor);
         const QString formula = GetParametrString(domElement, AttrLength, "100.0");
         QString f = formula;//need for saving fixed formula;
@@ -1179,13 +1179,13 @@ void VPattern::ParseToolLineIntersect(VMainGraphicsScene *scene, const QDomEleme
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const quint32 p1Line1Id = GetParametrUInt(domElement, AttrP1Line1, NULL_ID_STR);
         const quint32 p2Line1Id = GetParametrUInt(domElement, AttrP2Line1, NULL_ID_STR);
@@ -1209,13 +1209,13 @@ void VPattern::ParseToolPointOfContact(VMainGraphicsScene *scene, QDomElement &d
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const QString radius = GetParametrString(domElement, AttrRadius, "0");
         QString f = radius;//need for saving fixed formula;
@@ -1251,12 +1251,12 @@ void VPattern::ParseNodePoint(const QDomElement &domElement, const Document &par
 {
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, mx, my);
         const quint32 idObject = GetParametrUInt(domElement, VAbstractNode::AttrIdObject, NULL_ID_STR);
         const quint32 idTool = GetParametrUInt(domElement, VAbstractNode::AttrIdTool, NULL_ID_STR);
@@ -1279,15 +1279,15 @@ void VPattern::ParseToolHeight(VMainGraphicsScene *scene, const QDomElement &dom
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-    QString typeLine;
-    QString lineColor;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+        QString typeLine;
+        QString lineColor;
+
         PointsCommonAttributes(domElement, id, name, mx, my, typeLine, lineColor);
         const quint32 basePointId = GetParametrUInt(domElement, AttrBasePoint, NULL_ID_STR);
         const quint32 p1LineId = GetParametrUInt(domElement, AttrP1Line, NULL_ID_STR);
@@ -1310,13 +1310,13 @@ void VPattern::ParseToolTriangle(VMainGraphicsScene *scene, const QDomElement &d
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const quint32 axisP1Id = GetParametrUInt(domElement, AttrAxisP1, NULL_ID_STR);
         const quint32 axisP2Id = GetParametrUInt(domElement, AttrAxisP2, NULL_ID_STR);
@@ -1341,13 +1341,13 @@ void VPattern::ParseToolPointOfIntersection(VMainGraphicsScene *scene, const QDo
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const quint32 firstPointId = GetParametrUInt(domElement, AttrFirstPoint, NULL_ID_STR);
         const quint32 secondPointId = GetParametrUInt(domElement, AttrSecondPoint, NULL_ID_STR);
@@ -1369,13 +1369,13 @@ void VPattern::ParseToolCutSpline(VMainGraphicsScene *scene, QDomElement &domEle
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const QString formula = GetParametrString(domElement, AttrLength, "0");
         QString f = formula;//need for saving fixed formula;
@@ -1412,13 +1412,13 @@ void VPattern::ParseToolCutSplinePath(VMainGraphicsScene *scene, QDomElement &do
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const QString formula = GetParametrString(domElement, AttrLength, "0");
         QString f = formula;//need for saving fixed formula;
@@ -1456,13 +1456,13 @@ void VPattern::ParseToolCutArc(VMainGraphicsScene *scene, QDomElement &domElemen
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const QString formula = GetParametrString(domElement, AttrLength, "0");
         QString f = formula;//need for saving fixed formula;
@@ -1498,15 +1498,15 @@ void VPattern::ParseToolLineIntersectAxis(VMainGraphicsScene *scene, QDomElement
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-    QString typeLine;
-    QString lineColor;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+        QString typeLine;
+        QString lineColor;
+
         PointsCommonAttributes(domElement, id, name, mx, my, typeLine, lineColor);
 
         const quint32 basePointId = GetParametrUInt(domElement, AttrBasePoint, NULL_ID_STR);
@@ -1548,15 +1548,15 @@ void VPattern::ParseToolCurveIntersectAxis(VMainGraphicsScene *scene, QDomElemen
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-    QString typeLine;
-    QString lineColor;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+        QString typeLine;
+        QString lineColor;
+
         PointsCommonAttributes(domElement, id, name, mx, my, typeLine, lineColor);
 
         const quint32 basePointId = GetParametrUInt(domElement, AttrBasePoint, NULL_ID_STR);
@@ -1596,13 +1596,13 @@ void VPattern::ParseToolPointOfIntersectionArcs(VMainGraphicsScene *scene, const
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const quint32 firstArcId = GetParametrUInt(domElement, AttrFirstArc, NULL_ID_STR);
         const quint32 secondArcId = GetParametrUInt(domElement, AttrSecondArc, NULL_ID_STR);
@@ -1628,13 +1628,13 @@ void VPattern::ParseToolPointOfIntersectionCircles(VMainGraphicsScene *scene, QD
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const quint32 c1CenterId = GetParametrUInt(domElement, AttrC1Center, NULL_ID_STR);
         const quint32 c2CenterId = GetParametrUInt(domElement, AttrC2Center, NULL_ID_STR);
@@ -1670,13 +1670,13 @@ void VPattern::ParseToolPointFromCircleAndTangent(VMainGraphicsScene *scene, QDo
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const quint32 cCenterId = GetParametrUInt(domElement, AttrCCenter, NULL_ID_STR);
         const quint32 tangentId = GetParametrUInt(domElement, AttrTangent, NULL_ID_STR);
@@ -1710,13 +1710,13 @@ void VPattern::ParseToolPointFromArcAndTangent(VMainGraphicsScene *scene, const
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    QString name;
-    qreal mx = 0;
-    qreal my = 0;
-
     try
     {
+        quint32 id = 0;
+        QString name;
+        qreal mx = 0;
+        qreal my = 0;
+
         PointsCommonAttributes(domElement, id, name, mx, my);
         const quint32 arcId = GetParametrUInt(domElement, AttrArc, NULL_ID_STR);
         const quint32 tangentId = GetParametrUInt(domElement, AttrTangent, NULL_ID_STR);
@@ -1741,10 +1741,10 @@ void VPattern::ParseToolTrueDarts(VMainGraphicsScene *scene, const QDomElement &
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-
     try
     {
+        quint32 id = 0;
+
         ToolsCommonAttributes(domElement, id);
 
         const quint32 p1Id = GetParametrUInt(domElement, AttrPoint1, NULL_ID_STR);
@@ -1783,10 +1783,10 @@ void VPattern::ParseToolSpline(VMainGraphicsScene *scene, const QDomElement &dom
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-
     try
     {
+        quint32 id = 0;
+
         ToolsCommonAttributes(domElement, id);
         const quint32 point1 = GetParametrUInt(domElement, AttrPoint1, NULL_ID_STR);
         const quint32 point4 = GetParametrUInt(domElement, AttrPoint4, NULL_ID_STR);
@@ -1814,10 +1814,10 @@ void VPattern::ParseToolSplinePath(VMainGraphicsScene *scene, const QDomElement
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-
     try
     {
+        quint32 id = 0;
+
         ToolsCommonAttributes(domElement, id);
         const qreal kCurve = GetParametrDouble(domElement, AttrKCurve, "1.0");
         const QString color = GetParametrString(domElement, AttrColor, ColorBlack);
@@ -1866,12 +1866,12 @@ void VPattern::ParseNodeSpline(const QDomElement &domElement, const Document &pa
 {
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    quint32 idObject = 0;
-    quint32 idTool = 0;
-
     try
     {
+        quint32 id = 0;
+        quint32 idObject = 0;
+        quint32 idTool = 0;
+
         SplinesCommonAttributes(domElement, id, idObject, idTool);
         VSpline *spl = new VSpline(*data->GeometricObject<VSpline>(idObject));
         spl->setIdObject(idObject);
@@ -1892,12 +1892,12 @@ void VPattern::ParseNodeSplinePath(const QDomElement &domElement, const Document
 {
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-    quint32 idObject = 0;
-    quint32 idTool = 0;
-
     try
     {
+        quint32 id = 0;
+        quint32 idObject = 0;
+        quint32 idTool = 0;
+
         SplinesCommonAttributes(domElement, id, idObject, idTool);
         VSplinePath *path = new VSplinePath(*data->GeometricObject<VSplinePath>(idObject));
         path->setIdObject(idObject);
@@ -1919,10 +1919,10 @@ void VPattern::ParseToolArc(VMainGraphicsScene *scene, QDomElement &domElement,
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-
     try
     {
+        quint32 id = 0;
+
         ToolsCommonAttributes(domElement, id);
         const quint32 center = GetParametrUInt(domElement, AttrCenter, NULL_ID_STR);
         const QString radius = GetParametrString(domElement, AttrRadius, "10");
@@ -1962,10 +1962,10 @@ void VPattern::ParseNodeArc(const QDomElement &domElement, const Document &parse
 {
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-
     try
     {
+        quint32 id = 0;
+
         ToolsCommonAttributes(domElement, id);
         const quint32 idObject = GetParametrUInt(domElement, VAbstractNode::AttrIdObject, NULL_ID_STR);
         const quint32 idTool = GetParametrUInt(domElement, VAbstractNode::AttrIdTool, NULL_ID_STR);
@@ -1989,10 +1989,10 @@ void VPattern::ParseToolArcWithLength(VMainGraphicsScene *scene, QDomElement &do
     SCASSERT(scene != nullptr);
     Q_ASSERT_X(domElement.isNull() == false, Q_FUNC_INFO, "domElement is null");
 
-    quint32 id = 0;
-
     try
     {
+        quint32 id = 0;
+
         ToolsCommonAttributes(domElement, id);
         const quint32 center = GetParametrUInt(domElement, AttrCenter, NULL_ID_STR);
         const QString radius = GetParametrString(domElement, AttrRadius, "10");
diff --git a/src/libs/ifc/exception/vexception.h b/src/libs/ifc/exception/vexception.h
index 78db09df8..0c73fbacd 100644
--- a/src/libs/ifc/exception/vexception.h
+++ b/src/libs/ifc/exception/vexception.h
@@ -43,7 +43,7 @@ class VException : public QException
 {
     Q_DECLARE_TR_FUNCTIONS(VException)
 public:
-    VException(const QString &what);
+    explicit VException(const QString &what);
     VException(const VException &e);
     VException &operator=(const VException &e);
     virtual ~VException() V_NOEXCEPT_EXPR (true) Q_DECL_OVERRIDE {}
diff --git a/src/libs/ifc/exception/vexceptionundo.h b/src/libs/ifc/exception/vexceptionundo.h
index c8adcd8e4..c78d3c8fa 100644
--- a/src/libs/ifc/exception/vexceptionundo.h
+++ b/src/libs/ifc/exception/vexceptionundo.h
@@ -34,7 +34,7 @@
 class VExceptionUndo : public VException
 {
 public:
-    VExceptionUndo(const QString &what);
+    explicit VExceptionUndo(const QString &what);
     VExceptionUndo(const VExceptionUndo &e);
     virtual ~VExceptionUndo() V_NOEXCEPT_EXPR (true) Q_DECL_OVERRIDE;
 };
diff --git a/src/libs/ifc/xml/vabstractconverter.h b/src/libs/ifc/xml/vabstractconverter.h
index 4964d830a..5f8adff7e 100644
--- a/src/libs/ifc/xml/vabstractconverter.h
+++ b/src/libs/ifc/xml/vabstractconverter.h
@@ -35,7 +35,7 @@ class VAbstractConverter :public VDomDocument
 {
     Q_DECLARE_TR_FUNCTIONS(VAbstractConverter)
 public:
-    VAbstractConverter(const QString &fileName);
+    explicit VAbstractConverter(const QString &fileName);
     virtual ~VAbstractConverter() Q_DECL_OVERRIDE;
 
     void         Convert();
diff --git a/src/libs/ifc/xml/vabstractmconverter.h b/src/libs/ifc/xml/vabstractmconverter.h
index c31ff71a5..3f73b6c46 100644
--- a/src/libs/ifc/xml/vabstractmconverter.h
+++ b/src/libs/ifc/xml/vabstractmconverter.h
@@ -34,7 +34,7 @@
 class VAbstractMConverter : public VAbstractConverter
 {
 public:
-    VAbstractMConverter(const QString &fileName);
+    explicit VAbstractMConverter(const QString &fileName);
     virtual ~VAbstractMConverter() Q_DECL_OVERRIDE;
 
 protected:
diff --git a/src/libs/ifc/xml/vabstractpattern.h b/src/libs/ifc/xml/vabstractpattern.h
index e65a0d79c..d9cf1eb17 100644
--- a/src/libs/ifc/xml/vabstractpattern.h
+++ b/src/libs/ifc/xml/vabstractpattern.h
@@ -45,7 +45,7 @@ class VAbstractPattern : public QObject, public VDomDocument
 {
     Q_OBJECT
 public:
-    VAbstractPattern(QObject *parent = nullptr);
+    explicit VAbstractPattern(QObject *parent = nullptr);
     virtual ~VAbstractPattern() Q_DECL_OVERRIDE;
 
     QStringList    ListMeasurements() const;
diff --git a/src/libs/ifc/xml/vpatternconverter.h b/src/libs/ifc/xml/vpatternconverter.h
index 2a0c2d53b..5da3b07e1 100644
--- a/src/libs/ifc/xml/vpatternconverter.h
+++ b/src/libs/ifc/xml/vpatternconverter.h
@@ -35,7 +35,7 @@ class VPatternConverter : public VAbstractConverter
 {
     Q_DECLARE_TR_FUNCTIONS(VPatternConverter)
 public:
-    VPatternConverter(const QString &fileName);
+    explicit VPatternConverter(const QString &fileName);
     virtual ~VPatternConverter() Q_DECL_OVERRIDE;
 
     static const QString    PatternMaxVerStr;
diff --git a/src/libs/ifc/xml/vvitconverter.h b/src/libs/ifc/xml/vvitconverter.h
index d3b45b0a3..83a22a92f 100644
--- a/src/libs/ifc/xml/vvitconverter.h
+++ b/src/libs/ifc/xml/vvitconverter.h
@@ -35,7 +35,7 @@ class VVITConverter : public VAbstractMConverter
 {
     Q_DECLARE_TR_FUNCTIONS(VVITConverter)
 public:
-    VVITConverter(const QString &fileName);
+    explicit VVITConverter(const QString &fileName);
     virtual ~VVITConverter() Q_DECL_OVERRIDE;
 
     static const QString    MeasurementMaxVerStr;
diff --git a/src/libs/ifc/xml/vvstconverter.h b/src/libs/ifc/xml/vvstconverter.h
index 5ed54f0f1..4a0d55c49 100644
--- a/src/libs/ifc/xml/vvstconverter.h
+++ b/src/libs/ifc/xml/vvstconverter.h
@@ -35,7 +35,7 @@ class VVSTConverter : public VAbstractMConverter
 {
     Q_DECLARE_TR_FUNCTIONS(VVSTConverter)
 public:
-    VVSTConverter(const QString &fileName);
+    explicit VVSTConverter(const QString &fileName);
     virtual ~VVSTConverter() Q_DECL_OVERRIDE;
 
     static const QString    MeasurementMaxVerStr;
diff --git a/src/libs/qmuparser/qmuparser.cpp b/src/libs/qmuparser/qmuparser.cpp
index 2141a007b..d3c211848 100644
--- a/src/libs/qmuparser/qmuparser.cpp
+++ b/src/libs/qmuparser/qmuparser.cpp
@@ -134,7 +134,7 @@ qreal QmuParser::FMod(qreal number, qreal denom)
  */
 qreal QmuParser::Sum(const qreal *a_afArg, int a_iArgc)
 {
-    if (a_iArgc == false)
+    if (a_iArgc == 0)
     {
         throw QmuParserError("too few arguments for function sum.");
     }
@@ -154,7 +154,7 @@ qreal QmuParser::Sum(const qreal *a_afArg, int a_iArgc)
  */
 qreal QmuParser::Avg(const qreal *a_afArg, int a_iArgc)
 {
-    if (a_iArgc == false)
+    if (a_iArgc == 0)
     {
         throw QmuParserError("too few arguments for function sum.");
     }
@@ -174,7 +174,7 @@ qreal QmuParser::Avg(const qreal *a_afArg, int a_iArgc)
  */
 qreal QmuParser::Min(const qreal *a_afArg, int a_iArgc)
 {
-    if (a_iArgc == false)
+    if (a_iArgc == 0)
     {
         throw QmuParserError("too few arguments for function min.");
     }
@@ -194,7 +194,7 @@ qreal QmuParser::Min(const qreal *a_afArg, int a_iArgc)
  */
 qreal QmuParser::Max(const qreal *a_afArg, int a_iArgc)
 {
-    if (a_iArgc == false)
+    if (a_iArgc == 0)
     {
         throw QmuParserError("too few arguments for function min.");
     }
diff --git a/src/libs/qmuparser/qmuparserbase.cpp b/src/libs/qmuparser/qmuparserbase.cpp
index 2563349d9..7b4760a43 100644
--- a/src/libs/qmuparser/qmuparserbase.cpp
+++ b/src/libs/qmuparser/qmuparserbase.cpp
@@ -331,6 +331,7 @@ void QmuParserBase::AddCallback(const QString &a_strName, const QmuParserCallbac
  *
  * @throw ParserException if the name contains invalid charakters.
  */
+// cppcheck-suppress
 void QmuParserBase::CheckOprt(const QString &a_sName, const QmuParserCallback &a_Callback,
                               const QString &a_szCharSet) const
 {
@@ -361,6 +362,7 @@ void QmuParserBase::CheckOprt(const QString &a_sName, const QmuParserCallback &a
  *
  * @throw ParserException if the name contains invalid charakters.
  */
+// cppcheck-suppress
 void QmuParserBase::CheckName(const QString &a_sName, const QString &a_szCharSet) const
 {
     std::wstring a_sNameStd = a_sName.toStdWString();
diff --git a/src/libs/qmuparser/qmuparserbase.h b/src/libs/qmuparser/qmuparserbase.h
index 7a59ea3b0..544301ca1 100644
--- a/src/libs/qmuparser/qmuparserbase.h
+++ b/src/libs/qmuparser/qmuparserbase.h
@@ -54,7 +54,7 @@ class QMUPARSERSHARED_EXPORT QmuParserBase
     friend class QmuParserTokenReader;
 public:
     QmuParserBase();
-    QmuParserBase(const QmuParserBase &a_Parser);
+    explicit QmuParserBase(const QmuParserBase &a_Parser);
     QmuParserBase& operator=(const QmuParserBase &a_Parser);
     virtual ~QmuParserBase();
 
@@ -248,7 +248,9 @@ private:
     qreal              ParseString() const;
     qreal              ParseCmdCode() const;
     qreal              ParseCmdCodeBulk(int nOffset, int nThreadID) const;
+    // cppcheck-suppress functionStatic
     void               CheckName(const QString &a_strName, const QString &a_CharSet) const;
+    // cppcheck-suppress functionStatic
     void               CheckOprt(const QString &a_sName, const QmuParserCallback &a_Callback,
                                  const QString &a_szCharSet) const;
     void               StackDump(const QStack<token_type > &a_stVal, const QStack<token_type > &a_stOprt) const;
diff --git a/src/libs/qmuparser/qmuparserbytecode.cpp b/src/libs/qmuparser/qmuparserbytecode.cpp
index 5ba153629..29e525a62 100644
--- a/src/libs/qmuparser/qmuparserbytecode.cpp
+++ b/src/libs/qmuparser/qmuparserbytecode.cpp
@@ -34,7 +34,6 @@ namespace qmu
 /**
  * @brief Bytecode default constructor.
  */
-// cppcheck-suppress uninitMemberVar
 QmuParserByteCode::QmuParserByteCode()
     :m_iStackPos(0), m_iMaxStackSize(0), m_vRPN(), m_bEnableOptimizer(true)
 {
@@ -47,7 +46,6 @@ QmuParserByteCode::QmuParserByteCode()
  *
  * Implemented in Terms of Assign(const QParserByteCode &a_ByteCode)
  */
-// cppcheck-suppress uninitMemberVar
 QmuParserByteCode::QmuParserByteCode(const QmuParserByteCode &a_ByteCode)
     :m_iStackPos(a_ByteCode.m_iStackPos), m_iMaxStackSize(a_ByteCode.m_iMaxStackSize), m_vRPN(a_ByteCode.m_vRPN),
       m_bEnableOptimizer(true)
@@ -61,7 +59,6 @@ QmuParserByteCode::QmuParserByteCode(const QmuParserByteCode &a_ByteCode)
  *
  * Implemented in Terms of Assign(const QParserByteCode &a_ByteCode)
  */
-// cppcheck-suppress operatorEqVarError
 QmuParserByteCode& QmuParserByteCode::operator=(const QmuParserByteCode &a_ByteCode)
 {
     Assign(a_ByteCode);
diff --git a/src/libs/qmuparser/qmuparsertest.h b/src/libs/qmuparser/qmuparsertest.h
index c85ccafcf..006fa4edb 100644
--- a/src/libs/qmuparser/qmuparsertest.h
+++ b/src/libs/qmuparser/qmuparsertest.h
@@ -184,7 +184,7 @@ private:
 
     static qreal FirstArg ( const qreal* a_afArg, int a_iArgc )
     {
-        if ( a_iArgc == false)
+        if ( a_iArgc == 0)
         {
             throw QmuParserError ( "too few arguments for function FirstArg." );
         }
@@ -194,7 +194,7 @@ private:
 
     static qreal LastArg ( const qreal* a_afArg, int a_iArgc )
     {
-        if ( a_iArgc == false)
+        if ( a_iArgc == 0)
         {
             throw QmuParserError ( "too few arguments for function LastArg." );
         }
@@ -204,7 +204,7 @@ private:
 
     static qreal Sum ( const qreal* a_afArg, int a_iArgc )
     {
-        if ( a_iArgc == false)
+        if ( a_iArgc == 0)
         {
             throw QmuParserError ( "too few arguments for function sum." );
         }
diff --git a/src/libs/qmuparser/qmuparsertoken.h b/src/libs/qmuparser/qmuparsertoken.h
index 2c68be7cd..cbd0d12f9 100644
--- a/src/libs/qmuparser/qmuparsertoken.h
+++ b/src/libs/qmuparser/qmuparsertoken.h
@@ -335,6 +335,7 @@ public:
             FunctionPtr func;
         } var;
 
+        // cppcheck-suppress duplicateExpression
         Q_STATIC_ASSERT_X(sizeof(void *) == sizeof(void (*)(void)),
                           "object pointer and function pointer sizes must equal");
 
diff --git a/src/libs/qmuparser/qmuparsertokenreader.h b/src/libs/qmuparser/qmuparsertokenreader.h
index af4dbc245..7c57d1b54 100644
--- a/src/libs/qmuparser/qmuparsertokenreader.h
+++ b/src/libs/qmuparser/qmuparsertokenreader.h
@@ -44,7 +44,7 @@ class QmuParserTokenReader
 private:
     typedef QmuParserToken<qreal, QString> token_type;
 public:
-    QmuParserTokenReader(QmuParserBase *a_pParent);
+    explicit QmuParserTokenReader(QmuParserBase *a_pParent);
     QmuParserTokenReader* Clone(QmuParserBase *a_pParent) const;
 
     void           AddValIdent(identfun_type a_pCallback);
diff --git a/src/libs/vdxf/dxflib/dl_attributes.h b/src/libs/vdxf/dxflib/dl_attributes.h
index 7de8ad73d..38d192db8 100644
--- a/src/libs/vdxf/dxflib/dl_attributes.h
+++ b/src/libs/vdxf/dxflib/dl_attributes.h
@@ -237,7 +237,7 @@ public:
         inPaperSpace = on;
     }
 
-    bool isInPaperSpace()
+    bool isInPaperSpace() const
     {
         return inPaperSpace;
     }
diff --git a/src/libs/vdxf/dxflib/dl_creationinterface.h b/src/libs/vdxf/dxflib/dl_creationinterface.h
index 317986063..67590e97f 100644
--- a/src/libs/vdxf/dxflib/dl_creationinterface.h
+++ b/src/libs/vdxf/dxflib/dl_creationinterface.h
@@ -346,7 +346,7 @@ public:
     }
 
     /** @return the current attributes used for new entities. */
-    DL_Attributes getAttributes()
+    DL_Attributes getAttributes() const
     {
         return attributes;
     }
diff --git a/src/libs/vdxf/dxflib/dl_dxf.cpp b/src/libs/vdxf/dxflib/dl_dxf.cpp
index 7ce27f418..b4d79c966 100644
--- a/src/libs/vdxf/dxflib/dl_dxf.cpp
+++ b/src/libs/vdxf/dxflib/dl_dxf.cpp
@@ -68,7 +68,7 @@ DL_Dxf::DL_Dxf()
 
       firstHatchLoop(), hatchEdge(), hatchEdges(),
       xRecordHandle(), xRecordValues(), groupCodeTmp(), groupCode(), groupValue(),
-      currentObjectType(), settingKey(), values(), firstCall(), attrib(),
+      currentObjectType(), settingValue(), settingKey(), values(), firstCall(), attrib(),
       libVersion(), appDictionaryHandle(), styleHandleStd()
 {
 }
@@ -189,18 +189,13 @@ bool DL_Dxf::in(std::stringstream& stream,
  */
 bool DL_Dxf::readDxfGroups(FILE *fp, DL_CreationInterface* creationInterface)
 {
-
-    static int line = 1;
-
     // Read one group of the DXF file and strip the lines:
     if (DL_Dxf::getStrippedLine(groupCodeTmp, DL_DXF_MAXLINE, fp) &&
             DL_Dxf::getStrippedLine(groupValue, DL_DXF_MAXLINE, fp) )
     {
-
         groupCode = static_cast<unsigned int>(toInt(groupCodeTmp));
 
         creationInterface->processCodeValuePair(groupCode, groupValue);
-        line+=2;
         processDXFGroup(creationInterface, groupCode, groupValue);
     }
 
@@ -215,17 +210,12 @@ bool DL_Dxf::readDxfGroups(FILE *fp, DL_CreationInterface* creationInterface)
 bool DL_Dxf::readDxfGroups(std::stringstream& stream,
                            DL_CreationInterface* creationInterface)
 {
-
-    static int line = 1;
-
     // Read one group of the DXF file and chop the lines:
     if (DL_Dxf::getStrippedLine(groupCodeTmp, DL_DXF_MAXLINE, stream) &&
             DL_Dxf::getStrippedLine(groupValue, DL_DXF_MAXLINE, stream) )
     {
 
         groupCode = static_cast<unsigned int>(toInt(groupCodeTmp));
-
-        line+=2;
         processDXFGroup(creationInterface, groupCode, groupValue);
     }
     return !stream.eof();
@@ -2593,7 +2583,7 @@ DL_WriterA* DL_Dxf::out(const char* file, DL_Codes::version version)
  * @brief Writes a DXF header to the file currently opened
  * by the given DXF writer object.
  */
-void DL_Dxf::writeHeader(DL_WriterA& dw)
+void DL_Dxf::writeHeader(DL_WriterA& dw) const
 {
     dw.comment("dxflib " DL_VERSION);
     dw.sectionHeader();
@@ -2800,7 +2790,7 @@ void DL_Dxf::writeVertex(DL_WriterA& dw,
 /**
  * Writes the polyline end. Only needed for DXF R12.
  */
-void DL_Dxf::writePolylineEnd(DL_WriterA& dw)
+void DL_Dxf::writePolylineEnd(DL_WriterA& dw) const
 {
     if (version==DL_VERSION_2000)
     {
@@ -3248,7 +3238,7 @@ void DL_Dxf::writeAttribute(DL_WriterA& dw,
 }
 
 void DL_Dxf::writeDimStyleOverrides(DL_WriterA& dw,
-                                    const DL_DimensionData& data)
+                                    const DL_DimensionData& data) const
 {
 
     if (version==DL_VERSION_2000)
@@ -3781,7 +3771,7 @@ void DL_Dxf::writeLeader(DL_WriterA& dw,
  * @param data Entity data
  */
 void DL_Dxf::writeLeaderVertex(DL_WriterA& dw,
-                               const DL_LeaderVertexData& data)
+                               const DL_LeaderVertexData& data) const
 {
     if (version>DL_VERSION_R12)
     {
@@ -3843,7 +3833,7 @@ void DL_Dxf::writeHatch1(DL_WriterA& dw,
  */
 void DL_Dxf::writeHatch2(DL_WriterA& dw,
                          const DL_HatchData& data,
-                         const DL_Attributes& /*attrib*/)
+                         const DL_Attributes& /*attrib*/) const
 {
 
     dw.dxfInt(75, 0);                // odd parity
@@ -4076,7 +4066,7 @@ int DL_Dxf::writeImage(DL_WriterA& dw,
  */
 void DL_Dxf::writeImageDef(DL_WriterA& dw,
                            int handle,
-                           const DL_ImageData& data)
+                           const DL_ImageData& data) const
 {
 
     /*if (data.file.empty()) {
@@ -4187,7 +4177,7 @@ void DL_Dxf::writeLayer(DL_WriterA& dw,
  * tables section of a DXF file.
  */
 void DL_Dxf::writeLinetype(DL_WriterA& dw,
-                           const DL_LinetypeData& data)
+                           const DL_LinetypeData& data) const
 {
 
     std::string nameUpper = data.name;
@@ -4376,7 +4366,7 @@ void DL_Dxf::writeEndBlock(DL_WriterA& dw, const std::string& name)
  * Note that this method currently only writes a faked VPORT section
  * to make the file readable by Aut*cad.
  */
-void DL_Dxf::writeVPort(DL_WriterA& dw)
+void DL_Dxf::writeVPort(DL_WriterA& dw) const
 {
     dw.dxfString(0, "TABLE");
     dw.dxfString(2, "VPORT");
@@ -4533,7 +4523,7 @@ void DL_Dxf::writeStyle(DL_WriterA& dw, const DL_StyleData& style)
  * Note that this method currently only writes a faked VIEW section
  * to make the file readable by Aut*cad.
  */
-void DL_Dxf::writeView(DL_WriterA& dw)
+void DL_Dxf::writeView(DL_WriterA& dw) const
 {
     dw.dxfString(  0, "TABLE");
     dw.dxfString(  2, "VIEW");
@@ -4557,7 +4547,7 @@ void DL_Dxf::writeView(DL_WriterA& dw)
  * Note that this method currently only writes a faked UCS section
  * to make the file readable by Aut*cad.
  */
-void DL_Dxf::writeUcs(DL_WriterA& dw)
+void DL_Dxf::writeUcs(DL_WriterA& dw) const
 {
     dw.dxfString(  0, "TABLE");
     dw.dxfString(  2, "UCS");
@@ -4701,7 +4691,7 @@ void DL_Dxf::writeDimStyle(DL_WriterA& dw,
  * Note that this method currently only writes a faked BLOCKRECORD section
  * to make the file readable by Aut*cad.
  */
-void DL_Dxf::writeBlockRecord(DL_WriterA& dw)
+void DL_Dxf::writeBlockRecord(DL_WriterA& dw) const
 {
     dw.dxfString(  0, "TABLE");
     dw.dxfString(  2, "BLOCK_RECORD");
@@ -4772,7 +4762,7 @@ void DL_Dxf::writeBlockRecord(DL_WriterA& dw)
 /**
  * Writes a single block record with the given name.
  */
-void DL_Dxf::writeBlockRecord(DL_WriterA& dw, const std::string& name)
+void DL_Dxf::writeBlockRecord(DL_WriterA& dw, const std::string& name) const
 {
     dw.dxfString(  0, "BLOCK_RECORD");
     if (version==DL_VERSION_2000)
@@ -5815,9 +5805,6 @@ int DL_Dxf::getLibVersion(const std::string& str)
 {
     int d[4];
     int idx = 0;
-    //char v[4][5];
-    std::string v[4];
-    int ret = 0;
 
     for (unsigned int i=0; i<str.length() && idx<3; ++i)
     {
@@ -5832,6 +5819,8 @@ int DL_Dxf::getLibVersion(const std::string& str)
     {
         d[3] = static_cast<int>(str.length());
 
+        std::string v[4];
+
         v[0] = str.substr(0, d[0]);
         v[1] = str.substr(d[0]+1, d[1]-d[0]-1);
         v[2] = str.substr(d[1]+1, d[2]-d[1]-1);
@@ -5844,10 +5833,10 @@ int DL_Dxf::getLibVersion(const std::string& str)
             v[3] = "0";
         }
 
-        ret = (atoi(v[0].c_str())<<(3*8)) +
-              (atoi(v[1].c_str())<<(2*8)) +
-              (atoi(v[2].c_str())<<(1*8)) +
-              (atoi(v[3].c_str())<<(0*8));
+        const int ret = (atoi(v[0].c_str())<<(3*8)) +
+                        (atoi(v[1].c_str())<<(2*8)) +
+                        (atoi(v[2].c_str())<<(1*8)) +
+                        (atoi(v[3].c_str())<<(0*8));
 
         return ret;
     }
diff --git a/src/libs/vdxf/dxflib/dl_dxf.h b/src/libs/vdxf/dxflib/dl_dxf.h
index 7d36df357..7f1465f3c 100644
--- a/src/libs/vdxf/dxflib/dl_dxf.h
+++ b/src/libs/vdxf/dxflib/dl_dxf.h
@@ -143,7 +143,7 @@ public:
     void addLayer(DL_CreationInterface* creationInterface);
     void addLinetype(DL_CreationInterface *creationInterface);
     void addBlock(DL_CreationInterface* creationInterface);
-    void endBlock(DL_CreationInterface* creationInterface);
+    static void endBlock(DL_CreationInterface* creationInterface);
     void addTextStyle(DL_CreationInterface* creationInterface);
 
     void addPoint(DL_CreationInterface* creationInterface);
@@ -189,7 +189,7 @@ public:
     void addImage(DL_CreationInterface* creationInterface);
     void addImageDef(DL_CreationInterface* creationInterface);
 
-    void addComment(DL_CreationInterface* creationInterface, const std::string& comment);
+    static void addComment(DL_CreationInterface* creationInterface, const std::string& comment);
 
     void addDictionary(DL_CreationInterface* creationInterface);
     void addDictionaryEntry(DL_CreationInterface* creationInterface);
@@ -204,16 +204,16 @@ public:
     bool handleLeaderData(DL_CreationInterface* creationInterface);
     bool handleLinetypeData(DL_CreationInterface* creationInterface);
 
-    void endEntity(DL_CreationInterface* creationInterface);
+    static void endEntity(DL_CreationInterface* creationInterface);
 
-    void endSequence(DL_CreationInterface* creationInterface);
+    static void endSequence(DL_CreationInterface* creationInterface);
 
     //int  stringToInt(const char* s, bool* ok=NULL);
 
     DL_WriterA* out(const char* file,
                     DL_Codes::version version=DL_VERSION_2000);
 
-    void writeHeader(DL_WriterA& dw);
+    void writeHeader(DL_WriterA& dw) const;
 
     void writePoint(DL_WriterA& dw,
                     const DL_PointData& data,
@@ -232,16 +232,16 @@ public:
                        const DL_Attributes& attrib);
     void writeVertex(DL_WriterA& dw,
                      const DL_VertexData& data);
-    void writePolylineEnd(DL_WriterA& dw);
+    void writePolylineEnd(DL_WriterA& dw) const;
     void writeSpline(DL_WriterA& dw,
                      const DL_SplineData& data,
                      const DL_Attributes& attrib);
-    void writeControlPoint(DL_WriterA& dw,
-                           const DL_ControlPointData& data);
-    void writeFitPoint(DL_WriterA& dw,
-                       const DL_FitPointData& data);
-    void writeKnot(DL_WriterA& dw,
-                   const DL_KnotData& data);
+    static void writeControlPoint(DL_WriterA& dw,
+                                  const DL_ControlPointData& data);
+    static void writeFitPoint(DL_WriterA& dw,
+                              const DL_FitPointData& data);
+    static void writeKnot(DL_WriterA& dw,
+                          const DL_KnotData& data);
     void writeCircle(DL_WriterA& dw,
                      const DL_CircleData& data,
                      const DL_Attributes& attrib);
@@ -273,7 +273,7 @@ public:
                         const DL_AttributeData& data,
                         const DL_Attributes& attrib);
     void writeDimStyleOverrides(DL_WriterA& dw,
-                                const DL_DimensionData& data);
+                                const DL_DimensionData& data) const;
     void writeDimAligned(DL_WriterA& dw,
                          const DL_DimensionData& data,
                          const DL_DimAlignedData& edata,
@@ -306,59 +306,59 @@ public:
                      const DL_LeaderData& data,
                      const DL_Attributes& attrib);
     void writeLeaderVertex(DL_WriterA& dw,
-                           const DL_LeaderVertexData& data);
+                           const DL_LeaderVertexData& data) const;
     void writeHatch1(DL_WriterA& dw,
                      const DL_HatchData& data,
                      const DL_Attributes& attrib);
     void writeHatch2(DL_WriterA& dw,
                      const DL_HatchData& data,
-                     const DL_Attributes& attrib);
-    void writeHatchLoop1(DL_WriterA& dw,
-                         const DL_HatchLoopData& data);
-    void writeHatchLoop2(DL_WriterA& dw,
-                         const DL_HatchLoopData& data);
-    void writeHatchEdge(DL_WriterA& dw,
-                        const DL_HatchEdgeData& data);
+                     const DL_Attributes& attrib) const;
+    static void writeHatchLoop1(DL_WriterA& dw,
+                                const DL_HatchLoopData& data);
+    static void writeHatchLoop2(DL_WriterA& dw,
+                                const DL_HatchLoopData& data);
+    static void writeHatchEdge(DL_WriterA& dw,
+                               const DL_HatchEdgeData& data);
 
     int writeImage(DL_WriterA& dw,
                    const DL_ImageData& data,
                    const DL_Attributes& attrib);
 
     void writeImageDef(DL_WriterA& dw, int handle,
-                       const DL_ImageData& data);
+                       const DL_ImageData& data) const;
 
     void writeLayer(DL_WriterA& dw,
                     const DL_LayerData& data,
                     const DL_Attributes& attrib);
 
     void writeLinetype(DL_WriterA& dw,
-                       const DL_LinetypeData& data);
+                       const DL_LinetypeData& data) const;
 
-    void writeAppid(DL_WriterA& dw, const std::string& name);
+    static void writeAppid(DL_WriterA& dw, const std::string& name);
 
-    void writeBlock(DL_WriterA& dw,
-                    const DL_BlockData& data);
-    void writeEndBlock(DL_WriterA& dw, const std::string& name);
+    static void writeBlock(DL_WriterA& dw,
+                           const DL_BlockData& data);
+    static void writeEndBlock(DL_WriterA& dw, const std::string& name);
 
-    void writeVPort(DL_WriterA& dw);
+    void writeVPort(DL_WriterA& dw) const;
     void writeStyle(DL_WriterA& dw, const DL_StyleData& style);
-    void writeView(DL_WriterA& dw);
-    void writeUcs(DL_WriterA& dw);
+    void writeView(DL_WriterA& dw) const;
+    void writeUcs(DL_WriterA& dw) const;
     void writeDimStyle(DL_WriterA& dw,
                        double dimasz, double dimexe, double dimexo,
                        double dimgap, double dimtxt);
-    void writeBlockRecord(DL_WriterA& dw);
-    void writeBlockRecord(DL_WriterA& dw, const std::string& name);
+    void writeBlockRecord(DL_WriterA& dw) const;
+    void writeBlockRecord(DL_WriterA& dw, const std::string& name) const;
     void writeObjects(DL_WriterA& dw, const std::string& appDictionaryName = "");
     void writeAppDictionary(DL_WriterA& dw);
-    int writeDictionaryEntry(DL_WriterA& dw, const std::string& name);
+    static int writeDictionaryEntry(DL_WriterA& dw, const std::string& name);
     void writeXRecord(DL_WriterA& dw, int handle, int value);
     void writeXRecord(DL_WriterA& dw, int handle, double value);
     void writeXRecord(DL_WriterA& dw, int handle, bool value);
     void writeXRecord(DL_WriterA& dw, int handle, const std::string& value);
-    void writeObjectsEnd(DL_WriterA& dw);
+    static void writeObjectsEnd(DL_WriterA& dw);
 
-    void writeComment(DL_WriterA& dw, const std::string& comment);
+    static void writeComment(DL_WriterA& dw, const std::string& comment);
 
     /**
      * Converts the given string into a double or returns the given
@@ -392,12 +392,12 @@ public:
 
     static bool checkVariable(const char* var, DL_Codes::version version);
 
-    DL_Codes::version getVersion()
+    DL_Codes::version getVersion() const
     {
         return version;
     }
 
-    int getLibVersion(const std::string &str);
+    static int getLibVersion(const std::string &str);
 
     static void test();
 
@@ -415,13 +415,13 @@ public:
         return toInt(values[code]);
     }
 
-    int toInt(const std::string& str)
+    static int toInt(const std::string& str)
     {
         char* p;
         return static_cast<int>(strtol(str.c_str(), &p, 10));
     }
 
-    bool toBool(const std::string& str)
+    static bool toBool(const std::string& str)
     {
         char* p;
         return static_cast<bool>(strtol(str.c_str(), &p, 10));
@@ -445,7 +445,7 @@ public:
         return toReal(values[code]);
     }
 
-    double toReal(const std::string& str)
+    static double toReal(const std::string& str)
     {
         double ret;
         // make sure the real value uses '.' not ',':
diff --git a/src/libs/vdxf/dxflib/dl_entities.h b/src/libs/vdxf/dxflib/dl_entities.h
index 3c99e5177..4ff6c270c 100644
--- a/src/libs/vdxf/dxflib/dl_entities.h
+++ b/src/libs/vdxf/dxflib/dl_entities.h
@@ -568,7 +568,7 @@ struct DXFLIB_EXPORT DL_KnotData
      * Constructor.
      * Parameters: see member variables.
      */
-    DL_KnotData(double pk)
+    explicit DL_KnotData(double pk)
         : k(pk)
     {
     }
@@ -1425,7 +1425,7 @@ struct DXFLIB_EXPORT DL_HatchLoopData
      * Constructor.
      * Parameters: see member variables.
      */
-    DL_HatchLoopData(int hNumEdges)
+    explicit DL_HatchLoopData(int hNumEdges)
         : numEdges(hNumEdges)
     {
     }
@@ -1725,7 +1725,7 @@ struct DXFLIB_EXPORT DL_ImageDefData
  */
 struct DXFLIB_EXPORT DL_DictionaryData
 {
-    DL_DictionaryData(const std::string& handle) : handle(handle) {}
+    explicit DL_DictionaryData(const std::string& handle) : handle(handle) {}
     std::string handle;
 };
 
diff --git a/src/libs/vdxf/dxflib/dl_extrusion.h b/src/libs/vdxf/dxflib/dl_extrusion.h
index 0f1ab9790..c96886474 100644
--- a/src/libs/vdxf/dxflib/dl_extrusion.h
+++ b/src/libs/vdxf/dxflib/dl_extrusion.h
@@ -59,8 +59,9 @@ public:
     }
 
     DL_Extrusion(const DL_Extrusion &L)
-        : direction(L.direction), elevation(L.elevation)
+        : direction(new double[3]), elevation(L.elevation)
     {
+        setDirection(L.direction[0], L.direction[1], L.direction[0]);
     }
 
     /**
diff --git a/src/libs/vdxf/dxflib/dl_writer.h b/src/libs/vdxf/dxflib/dl_writer.h
index 00515fded..69264fd8b 100644
--- a/src/libs/vdxf/dxflib/dl_writer.h
+++ b/src/libs/vdxf/dxflib/dl_writer.h
@@ -62,7 +62,8 @@ public:
     /**
      * @param version DXF version. Defaults to DL_VERSION_2002.
      */
-    DL_Writer(DL_Codes::version version) : m_handle(0x30), modelSpaceHandle(0), paperSpaceHandle(0), paperSpace0Handle(0), version(version)
+    explicit DL_Writer(DL_Codes::version version)
+        : m_handle(0x30), modelSpaceHandle(0), paperSpaceHandle(0), paperSpace0Handle(0), version(version)
     {
     }
 
@@ -616,12 +617,13 @@ public:
      * Sets the handle of the model space. Entities refer to
      * this handle.
      */
+    // cppcheck-suppress functionConst
     void setModelSpaceHandle(unsigned long h)
     {
         modelSpaceHandle = h;
     }
 
-    unsigned long getModelSpaceHandle()
+    unsigned long getModelSpaceHandle() const
     {
         return modelSpaceHandle;
     }
@@ -630,12 +632,13 @@ public:
      * Sets the handle of the paper space. Some special blocks refer to
      * this handle.
      */
+    // cppcheck-suppress functionConst
     void setPaperSpaceHandle(unsigned long h)
     {
         paperSpaceHandle = h;
     }
 
-    unsigned long getPaperSpaceHandle()
+    unsigned long getPaperSpaceHandle() const
     {
         return paperSpaceHandle;
     }
@@ -644,12 +647,13 @@ public:
      * Sets the handle of the paper space 0. Some special blocks refer to
      * this handle.
      */
+    // cppcheck-suppress functionConst
     void setPaperSpace0Handle(unsigned long h)
     {
         paperSpace0Handle = h;
     }
 
-    unsigned long getPaperSpace0Handle()
+    unsigned long getPaperSpace0Handle() const
     {
         return paperSpace0Handle;
     }
diff --git a/src/libs/vformat/vmeasurements.h b/src/libs/vformat/vmeasurements.h
index 1acfb0fae..bf64a8129 100644
--- a/src/libs/vformat/vmeasurements.h
+++ b/src/libs/vformat/vmeasurements.h
@@ -38,7 +38,7 @@ class VMeasurements : public VDomDocument
 {
     Q_DECLARE_TR_FUNCTIONS(VMeasurements)
 public:
-    VMeasurements(VContainer *data);
+    explicit VMeasurements(VContainer *data);
     VMeasurements(Unit unit, VContainer *data);
     VMeasurements(Unit unit, int baseSize, int baseHeight, VContainer *data);
     virtual ~VMeasurements() Q_DECL_OVERRIDE;
diff --git a/src/libs/vgeometry/vabstractcurve.h b/src/libs/vgeometry/vabstractcurve.h
index 3276561f1..d6082041d 100644
--- a/src/libs/vgeometry/vabstractcurve.h
+++ b/src/libs/vgeometry/vabstractcurve.h
@@ -42,7 +42,7 @@ class VAbstractCurve :public VGObject
 {
 public:
     VAbstractCurve(const GOType &type, const quint32 &idObject = NULL_ID, const Draw &mode = Draw::Calculation);
-    VAbstractCurve(const VAbstractCurve &curve);
+    explicit VAbstractCurve(const VAbstractCurve &curve);
     VAbstractCurve& operator= (const VAbstractCurve &curve);
 
     virtual QVector<QPointF> GetPoints() const =0;
diff --git a/src/libs/vgeometry/vpointf.h b/src/libs/vgeometry/vpointf.h
index b41a93d1f..da141fa0d 100644
--- a/src/libs/vgeometry/vpointf.h
+++ b/src/libs/vgeometry/vpointf.h
@@ -43,11 +43,12 @@ class VPointF:public VGObject
 public:
     VPointF ();
     VPointF (const VPointF &point );
+    // cppcheck-suppress noExplicitConstructor
     VPointF (const QPointF &point );
     VPointF (qreal x, qreal y, const QString &name, qreal mx, qreal my, quint32 idObject = 0,
-              const Draw &mode = Draw::Calculation);
+             const Draw &mode = Draw::Calculation);
     VPointF (const QPointF &point, const QString &name, qreal mx, qreal my, quint32 idObject = 0,
-              const Draw &mode = Draw::Calculation);
+             const Draw &mode = Draw::Calculation);
     virtual ~VPointF() Q_DECL_OVERRIDE;
     VPointF &operator=(const VPointF &point);
     qreal   mx() const;
diff --git a/src/libs/vgeometry/vpointf_p.h b/src/libs/vgeometry/vpointf_p.h
index cc7e35801..fd5553ee3 100644
--- a/src/libs/vgeometry/vpointf_p.h
+++ b/src/libs/vgeometry/vpointf_p.h
@@ -50,7 +50,7 @@ public:
         :QSharedData(point), _mx(point._mx), _my(point._my), _x(point._x), _y(point._y)
     {}
 
-    VPointFData(const QPointF &point)
+    explicit VPointFData(const QPointF &point)
         :_mx(0), _my(0), _x(point.x()), _y(point.y())
     {}
 
diff --git a/src/libs/vgeometry/vspline.cpp b/src/libs/vgeometry/vspline.cpp
index ab51f05ce..9a22810e7 100644
--- a/src/libs/vgeometry/vspline.cpp
+++ b/src/libs/vgeometry/vspline.cpp
@@ -371,7 +371,6 @@ void VSpline::PointBezier_r ( qreal x1, qreal y1, qreal x2, qreal y2,
                     const double da2 = y3 - y1;
                     d3  = k * (da1*dx + da2*dy);
                 }
-                // cppcheck-suppress incorrectLogicOperator
                 if (d2 > 0 && d2 < 1 && d3 > 0 && d3 < 1)
                 {
                     // Simple collinear case, 1---2---3---4
diff --git a/src/libs/vgeometry/vsplinepath_p.h b/src/libs/vgeometry/vsplinepath_p.h
index 627bbeaee..cf6dcd319 100644
--- a/src/libs/vgeometry/vsplinepath_p.h
+++ b/src/libs/vgeometry/vsplinepath_p.h
@@ -45,7 +45,7 @@ public:
         : path(QVector<VSplinePoint>()), kCurve(1)
     {}
 
-    VSplinePathData(qreal kCurve)
+    explicit VSplinePathData(qreal kCurve)
         : path(QVector<VSplinePoint>()), kCurve(kCurve)
     {}
 
diff --git a/src/libs/vlayout/vabstractdetail.h b/src/libs/vlayout/vabstractdetail.h
index 04ef46214..339d931bf 100644
--- a/src/libs/vlayout/vabstractdetail.h
+++ b/src/libs/vlayout/vabstractdetail.h
@@ -45,7 +45,7 @@ class VAbstractDetail
 {
 public:
     VAbstractDetail();
-    VAbstractDetail(const QString &name);
+    explicit VAbstractDetail(const QString &name);
     VAbstractDetail(const VAbstractDetail &detail);
     VAbstractDetail &operator=(const VAbstractDetail &detail);
     virtual ~VAbstractDetail();
diff --git a/src/libs/vlayout/vabstractdetail_p.h b/src/libs/vlayout/vabstractdetail_p.h
index 9f4fca2f5..57ee2c96b 100644
--- a/src/libs/vlayout/vabstractdetail_p.h
+++ b/src/libs/vlayout/vabstractdetail_p.h
@@ -44,7 +44,7 @@ public:
         :name(QString()), seamAllowance(false), closed(true), width(0)
     {}
 
-    VAbstractDetailData(const QString &name)
+    explicit VAbstractDetailData(const QString &name)
         :name(name), seamAllowance(false), closed(true), width(0)
     {}
 
diff --git a/src/libs/vlayout/vlayoutgenerator.h b/src/libs/vlayout/vlayoutgenerator.h
index 233d102ae..b2797298a 100644
--- a/src/libs/vlayout/vlayoutgenerator.h
+++ b/src/libs/vlayout/vlayoutgenerator.h
@@ -44,7 +44,7 @@ class VLayoutGenerator :public QObject
 {
     Q_OBJECT
 public:
-    VLayoutGenerator(QObject *parent = 0);
+    explicit VLayoutGenerator(QObject *parent = 0);
     virtual ~VLayoutGenerator() Q_DECL_OVERRIDE;
 
     void SetDetails(const QVector<VLayoutDetail> &details);
diff --git a/src/libs/vlayout/vposter.h b/src/libs/vlayout/vposter.h
index b3adf3576..8b30ab5ba 100644
--- a/src/libs/vlayout/vposter.h
+++ b/src/libs/vlayout/vposter.h
@@ -39,7 +39,7 @@ class VPoster
 {
     Q_DECLARE_TR_FUNCTIONS(VPoster)
 public:
-    VPoster(const QPrinter *printer);
+    explicit VPoster(const QPrinter *printer);
 
     QVector<QImage> Generate(const QImage &image, int page, int sheets = 1) const;
 private:
diff --git a/src/libs/vmisc/vlockguard.h b/src/libs/vmisc/vlockguard.h
index ec7d822f6..4f1e84630 100644
--- a/src/libs/vmisc/vlockguard.h
+++ b/src/libs/vmisc/vlockguard.h
@@ -75,6 +75,7 @@ private:
     std::shared_ptr<QLockFile> lock;
 #endif
 
+    // cppcheck-suppress functionStatic
     bool TryLock(const QString &lockName, int stale, int timeout);
 };
 
diff --git a/src/libs/vpatterndb/variables/vincrement.cpp b/src/libs/vpatterndb/variables/vincrement.cpp
index c72a96d9f..8c7f60718 100644
--- a/src/libs/vpatterndb/variables/vincrement.cpp
+++ b/src/libs/vpatterndb/variables/vincrement.cpp
@@ -48,7 +48,7 @@ VIncrement::VIncrement()
  * @param description description of increment
  */
 VIncrement::VIncrement(VContainer *data, const QString &name, quint32 index, qreal base, const QString &formula,
-                       bool ok, const QString description)
+                       bool ok, const QString &description)
     :VVariable(name, base, description), d(new VIncrementData(data, index, formula, ok))
 {
     SetType(VarType::Increment);
diff --git a/src/libs/vpatterndb/variables/vincrement.h b/src/libs/vpatterndb/variables/vincrement.h
index 7a7d088cd..5f20905fa 100644
--- a/src/libs/vpatterndb/variables/vincrement.h
+++ b/src/libs/vpatterndb/variables/vincrement.h
@@ -42,7 +42,7 @@ class VIncrement :public VVariable
 public:
     VIncrement();
     VIncrement(VContainer *data, const QString &name, quint32 index, qreal base, const QString &formula, bool ok,
-               const QString description = QString());
+               const QString &description = QString());
     VIncrement(const VIncrement &incr);
     VIncrement &operator=(const VIncrement &incr);
     virtual ~VIncrement() Q_DECL_OVERRIDE;
diff --git a/src/libs/vpatterndb/vcontainer.cpp b/src/libs/vpatterndb/vcontainer.cpp
index dc895d5ae..c933be86c 100644
--- a/src/libs/vpatterndb/vcontainer.cpp
+++ b/src/libs/vpatterndb/vcontainer.cpp
@@ -96,7 +96,7 @@ const QSharedPointer<VGObject> VContainer::GetGObject(quint32 id)const
 }
 
 //---------------------------------------------------------------------------------------------------------------------
-const QSharedPointer<VGObject> VContainer::GetFakeGObject(quint32 id) const
+const QSharedPointer<VGObject> VContainer::GetFakeGObject(quint32 id)
 {
     VGObject *obj = new VGObject();
     obj->setId(id);
diff --git a/src/libs/vpatterndb/vcontainer.h b/src/libs/vpatterndb/vcontainer.h
index 492ad2be5..5d4f8f5f2 100644
--- a/src/libs/vpatterndb/vcontainer.h
+++ b/src/libs/vpatterndb/vcontainer.h
@@ -103,7 +103,7 @@ public:
     template <typename T>
     const QSharedPointer<T> GeometricObject(const quint32 &id) const;
     const QSharedPointer<VGObject> GetGObject(quint32 id) const;
-    const QSharedPointer<VGObject> GetFakeGObject(quint32 id) const;
+    static const QSharedPointer<VGObject> GetFakeGObject(quint32 id);
     const VDetail      GetDetail(quint32 id) const;
     qreal              GetTableValue(const QString& name, MeasurementsType patternType) const;
     template <typename T>
diff --git a/src/libs/vpatterndb/vdetail_p.h b/src/libs/vpatterndb/vdetail_p.h
index 28e5fcfa8..d8c45f90b 100644
--- a/src/libs/vpatterndb/vdetail_p.h
+++ b/src/libs/vpatterndb/vdetail_p.h
@@ -45,7 +45,7 @@ public:
         :_id(NULL_ID), nodes(QVector<VNodeDetail>()), mx(0), my(0)
     {}
 
-    VDetailData(const QVector<VNodeDetail> &nodes)
+    explicit VDetailData(const QVector<VNodeDetail> &nodes)
         :_id(NULL_ID), nodes(nodes), mx(0), my(0)
     {}
 
diff --git a/src/libs/vpatterndb/vtranslatevars.h b/src/libs/vpatterndb/vtranslatevars.h
index 162152309..92249db40 100644
--- a/src/libs/vpatterndb/vtranslatevars.h
+++ b/src/libs/vpatterndb/vtranslatevars.h
@@ -34,7 +34,7 @@
 class VTranslateVars : public VTranslateMeasurements
 {
 public:
-    VTranslateVars(bool osSeparator);
+    explicit VTranslateVars(bool osSeparator);
     virtual ~VTranslateVars() Q_DECL_OVERRIDE;
 
     bool VariablesFromUser(QString &newFormula, int position, const QString &token, int &bias) const;
diff --git a/src/libs/vpropertyexplorer/checkablemessagebox.cpp b/src/libs/vpropertyexplorer/checkablemessagebox.cpp
index c37e7c2ca..320df4bca 100644
--- a/src/libs/vpropertyexplorer/checkablemessagebox.cpp
+++ b/src/libs/vpropertyexplorer/checkablemessagebox.cpp
@@ -42,7 +42,7 @@ namespace Utils
 class CheckableMessageBoxPrivate
 {
 public:
-    CheckableMessageBoxPrivate(QDialog *q)
+    explicit CheckableMessageBoxPrivate(QDialog *q)
         : pixmapLabel(nullptr), messageLabel(nullptr), checkBox(nullptr), buttonBox(nullptr), clickedButton(nullptr)
     {
         QSizePolicy sizePolicy(QSizePolicy::Minimum, QSizePolicy::Preferred);
diff --git a/src/libs/vpropertyexplorer/plugins/Vector3d/vvector3dproperty.h b/src/libs/vpropertyexplorer/plugins/Vector3d/vvector3dproperty.h
index ffd196312..c2ea067aa 100644
--- a/src/libs/vpropertyexplorer/plugins/Vector3d/vvector3dproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/Vector3d/vvector3dproperty.h
@@ -53,7 +53,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT QVector3DProperty : public VProperty
 {
     Q_OBJECT
 public:
-    QVector3DProperty(const QString& name);
+    explicit QVector3DProperty(const QString& name);
 
     virtual ~QVector3DProperty() Q_DECL_OVERRIDE {}
 
diff --git a/src/libs/vpropertyexplorer/plugins/vboolproperty.h b/src/libs/vpropertyexplorer/plugins/vboolproperty.h
index f4fc1835e..6e9d4b3f0 100644
--- a/src/libs/vpropertyexplorer/plugins/vboolproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vboolproperty.h
@@ -32,7 +32,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VBoolProperty : public VProperty
     Q_OBJECT
 public:
     //! Default constructor
-    VBoolProperty(const QString& name);
+    explicit VBoolProperty(const QString& name);
 
     //! Destructor
     virtual ~VBoolProperty()  Q_DECL_OVERRIDE {}
diff --git a/src/libs/vpropertyexplorer/plugins/vcolorproperty.h b/src/libs/vpropertyexplorer/plugins/vcolorproperty.h
index bf75a98e4..b7f13c6a6 100644
--- a/src/libs/vpropertyexplorer/plugins/vcolorproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vcolorproperty.h
@@ -32,7 +32,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VColorProperty : public VProperty
 {
     Q_OBJECT
 public:
-    VColorProperty(const QString &name);
+    explicit VColorProperty(const QString &name);
 
     //! Get the data how it should be displayed
     virtual QVariant data (int column = DPC_Name, int role = Qt::DisplayRole) const Q_DECL_OVERRIDE;
diff --git a/src/libs/vpropertyexplorer/plugins/vcolorpropertyeditor.h b/src/libs/vpropertyexplorer/plugins/vcolorpropertyeditor.h
index 32c94b9df..9f833d27b 100644
--- a/src/libs/vpropertyexplorer/plugins/vcolorpropertyeditor.h
+++ b/src/libs/vpropertyexplorer/plugins/vcolorpropertyeditor.h
@@ -38,7 +38,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VColorPropertyEditor : public QWidget
 
 public:
     //! Constructor taking a widget as parent
-    VColorPropertyEditor(QWidget *parent);
+    explicit VColorPropertyEditor(QWidget *parent);
 
     //! Destructor
     virtual ~VColorPropertyEditor() Q_DECL_OVERRIDE;
diff --git a/src/libs/vpropertyexplorer/plugins/vemptyproperty.h b/src/libs/vpropertyexplorer/plugins/vemptyproperty.h
index 47e11d9d0..5f8c41803 100644
--- a/src/libs/vpropertyexplorer/plugins/vemptyproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vemptyproperty.h
@@ -65,7 +65,7 @@ public:
 
 protected:
     //! Protected constructor
-    VEmptyProperty(VPropertyPrivate* d);
+    explicit VEmptyProperty(VPropertyPrivate* d);
 
 private:
     Q_DISABLE_COPY(VEmptyProperty)
diff --git a/src/libs/vpropertyexplorer/plugins/venumproperty.h b/src/libs/vpropertyexplorer/plugins/venumproperty.h
index adae0a71d..8e11375cc 100644
--- a/src/libs/vpropertyexplorer/plugins/venumproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/venumproperty.h
@@ -33,7 +33,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VEnumProperty : public VProperty
     Q_OBJECT
 public:
     //! Constructor
-    VEnumProperty(const QString& name);
+    explicit VEnumProperty(const QString& name);
 
     //! Destructor
     virtual ~VEnumProperty() Q_DECL_OVERRIDE {}
diff --git a/src/libs/vpropertyexplorer/plugins/vfileproperty.h b/src/libs/vpropertyexplorer/plugins/vfileproperty.h
index b520e2bf9..5eb7681d9 100644
--- a/src/libs/vpropertyexplorer/plugins/vfileproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vfileproperty.h
@@ -34,7 +34,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VFileProperty : public VProperty
 {
     Q_OBJECT
 public:
-    VFileProperty(const QString &name);
+    explicit VFileProperty(const QString &name);
 
     //! The destructor
     virtual ~VFileProperty() Q_DECL_OVERRIDE;
diff --git a/src/libs/vpropertyexplorer/plugins/vlinecolorproperty.h b/src/libs/vpropertyexplorer/plugins/vlinecolorproperty.h
index 10d94e7cb..017b60c86 100644
--- a/src/libs/vpropertyexplorer/plugins/vlinecolorproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vlinecolorproperty.h
@@ -42,7 +42,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VLineColorProperty : public VProperty
     Q_OBJECT
 public:
     //! Constructor
-    VLineColorProperty(const QString& name);
+    explicit VLineColorProperty(const QString& name);
 
     //! Destructor
     virtual ~VLineColorProperty() Q_DECL_OVERRIDE {}
diff --git a/src/libs/vpropertyexplorer/plugins/vlinetypeproperty.h b/src/libs/vpropertyexplorer/plugins/vlinetypeproperty.h
index 9e79eb462..cb10616d0 100644
--- a/src/libs/vpropertyexplorer/plugins/vlinetypeproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vlinetypeproperty.h
@@ -43,7 +43,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VLineTypeProperty : public VProperty
     Q_OBJECT
 public:
     //! Constructor
-    VLineTypeProperty(const QString& name);
+    explicit VLineTypeProperty(const QString& name);
 
     //! Destructor
     virtual ~VLineTypeProperty() Q_DECL_OVERRIDE {}
diff --git a/src/libs/vpropertyexplorer/plugins/vnumberproperty.h b/src/libs/vpropertyexplorer/plugins/vnumberproperty.h
index 2a65023ae..9c2a81762 100644
--- a/src/libs/vpropertyexplorer/plugins/vnumberproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vnumberproperty.h
@@ -35,7 +35,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VIntegerProperty : public VProperty
 public:
     VIntegerProperty(const QString& name, const QMap<QString, QVariant>& settings);
 
-    VIntegerProperty(const QString& name);
+    explicit VIntegerProperty(const QString& name);
 
     //! Returns an editor widget, or NULL if it doesn't supply one
     //! \param parent The widget to which the editor will be added as a child
@@ -89,7 +89,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VDoubleProperty : public VIntegerProperty
 public:
     VDoubleProperty(const QString& name, const QMap<QString, QVariant>& settings);
 
-    VDoubleProperty(const QString& name);
+    explicit VDoubleProperty(const QString& name);
 
     //! Returns an editor widget, or NULL if it doesn't supply one
     //! \param parent The widget to which the editor will be added as a child
diff --git a/src/libs/vpropertyexplorer/plugins/vobjectproperty.h b/src/libs/vpropertyexplorer/plugins/vobjectproperty.h
index 55495ad5a..50d3d1cfd 100644
--- a/src/libs/vpropertyexplorer/plugins/vobjectproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vobjectproperty.h
@@ -35,7 +35,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VObjectProperty : public VProperty
     Q_OBJECT
 public:
     //! Constructor
-    VObjectProperty(const QString& name);
+    explicit VObjectProperty(const QString& name);
 
     //! Destructor
     virtual ~VObjectProperty() Q_DECL_OVERRIDE {}
diff --git a/src/libs/vpropertyexplorer/plugins/vpointfproperty.h b/src/libs/vpropertyexplorer/plugins/vpointfproperty.h
index d899a7c95..4ca9b647e 100644
--- a/src/libs/vpropertyexplorer/plugins/vpointfproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vpointfproperty.h
@@ -32,7 +32,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VPointFProperty : public VProperty
 {
     Q_OBJECT
 public:
-    VPointFProperty(const QString& name);
+    explicit VPointFProperty(const QString& name);
 
     virtual ~VPointFProperty() Q_DECL_OVERRIDE {}
 
diff --git a/src/libs/vpropertyexplorer/plugins/vshortcutproperty.h b/src/libs/vpropertyexplorer/plugins/vshortcutproperty.h
index df5bffa51..0f5a21b79 100644
--- a/src/libs/vpropertyexplorer/plugins/vshortcutproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vshortcutproperty.h
@@ -32,7 +32,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VShortcutProperty : public VProperty
 {
     Q_OBJECT
 public:
-    VShortcutProperty(const QString &name);
+    explicit VShortcutProperty(const QString &name);
 
     //! The destructor
     virtual ~VShortcutProperty() Q_DECL_OVERRIDE;
diff --git a/src/libs/vpropertyexplorer/plugins/vshortcutpropertyeditor.h b/src/libs/vpropertyexplorer/plugins/vshortcutpropertyeditor.h
index d8b14130f..db75b531c 100644
--- a/src/libs/vpropertyexplorer/plugins/vshortcutpropertyeditor.h
+++ b/src/libs/vpropertyexplorer/plugins/vshortcutpropertyeditor.h
@@ -37,7 +37,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VShortcutEditWidget : public QWidget
     Q_OBJECT
 
 public:
-    VShortcutEditWidget(QWidget* parent);
+    explicit VShortcutEditWidget(QWidget* parent);
     virtual ~VShortcutEditWidget() Q_DECL_OVERRIDE;
 
     //! Needed for proper event handling
diff --git a/src/libs/vpropertyexplorer/plugins/vstringproperty.h b/src/libs/vpropertyexplorer/plugins/vstringproperty.h
index 11cac1f74..10f3bee84 100644
--- a/src/libs/vpropertyexplorer/plugins/vstringproperty.h
+++ b/src/libs/vpropertyexplorer/plugins/vstringproperty.h
@@ -35,7 +35,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VStringProperty : public VProperty
 public:
     VStringProperty(const QString& name, const QMap<QString, QVariant>& settings);
 
-    VStringProperty(const QString& name);
+    explicit VStringProperty(const QString& name);
 
     //! Returns an editor widget, or NULL if it doesn't supply one
     //! \param parent The widget to which the editor will be added as a child
diff --git a/src/libs/vpropertyexplorer/vproperty.h b/src/libs/vpropertyexplorer/vproperty.h
index 613b6eb72..951ff3b12 100644
--- a/src/libs/vpropertyexplorer/vproperty.h
+++ b/src/libs/vpropertyexplorer/vproperty.h
@@ -203,7 +203,7 @@ signals:
 
 protected:
     //! Protected constructor
-    VProperty(VPropertyPrivate* d);
+    explicit VProperty(VPropertyPrivate* d);
 
     //! The protected structure holding the member variables (to assure binary compatibility)
     VPropertyPrivate* d_ptr;
diff --git a/src/libs/vpropertyexplorer/vpropertyfactorymanager.h b/src/libs/vpropertyexplorer/vpropertyfactorymanager.h
index e113e1b96..feab9e4be 100644
--- a/src/libs/vpropertyexplorer/vpropertyfactorymanager.h
+++ b/src/libs/vpropertyexplorer/vpropertyfactorymanager.h
@@ -36,7 +36,7 @@ class VPROPERTYEXPLORERSHARED_EXPORT VPropertyFactoryManager : public QObject
     Q_OBJECT
 public:
     //! Constructor
-    VPropertyFactoryManager(QObject* parent = nullptr);
+    explicit VPropertyFactoryManager(QObject* parent = nullptr);
 
     //! Destructor
     virtual ~VPropertyFactoryManager() Q_DECL_OVERRIDE;
diff --git a/src/libs/vpropertyexplorer/vpropertyformview_p.h b/src/libs/vpropertyexplorer/vpropertyformview_p.h
index 1414a6d10..dfb145bac 100644
--- a/src/libs/vpropertyexplorer/vpropertyformview_p.h
+++ b/src/libs/vpropertyexplorer/vpropertyformview_p.h
@@ -56,12 +56,12 @@ public:
           IgnoreDataChangedSignal(false)
     {}
 
-    VPropertyFormViewPrivate(VPropertyModel* prop_model)
+    explicit VPropertyFormViewPrivate(VPropertyModel* prop_model)
         : VPropertyFormWidgetPrivate(), Model(prop_model), PropertySet(NULL), NeedsRebuild(false),
           IgnoreDataChangedSignal(false)
     {}
 
-    VPropertyFormViewPrivate(VPropertySet* prop_set)
+    explicit VPropertyFormViewPrivate(VPropertySet* prop_set)
         : VPropertyFormWidgetPrivate(), Model(NULL), PropertySet(prop_set), NeedsRebuild(false),
           IgnoreDataChangedSignal(false)
     {}
diff --git a/src/libs/vpropertyexplorer/vpropertyformwidget_p.h b/src/libs/vpropertyexplorer/vpropertyformwidget_p.h
index 70b34fa29..71a1e005d 100644
--- a/src/libs/vpropertyexplorer/vpropertyformwidget_p.h
+++ b/src/libs/vpropertyexplorer/vpropertyformwidget_p.h
@@ -41,8 +41,8 @@ public:
     struct SEditorWidget
     {
         SEditorWidget() : FormWidget(nullptr), Editor(nullptr) {}
-        SEditorWidget(VPropertyFormWidget* form_widget) : FormWidget(form_widget), Editor(nullptr) {}
-        SEditorWidget(QWidget* editor_widget) : FormWidget(nullptr), Editor(editor_widget) {}
+        explicit SEditorWidget(VPropertyFormWidget* form_widget) : FormWidget(form_widget), Editor(nullptr) {}
+        explicit SEditorWidget(QWidget* editor_widget) : FormWidget(nullptr), Editor(editor_widget) {}
 
         VPropertyFormWidget* FormWidget;
         QWidget* Editor;
@@ -64,7 +64,7 @@ public:
     {}
 
     //! Constructor
-    VPropertyFormWidgetPrivate(const QList<VProperty*>& properties)
+    explicit VPropertyFormWidgetPrivate(const QList<VProperty*>& properties)
         : Properties(properties), EditorWidgets(QList<SEditorWidget>()), UpdateEditors(true)
     {}
 
diff --git a/src/libs/vpropertyexplorer/vpropertytreeview_p.h b/src/libs/vpropertyexplorer/vpropertytreeview_p.h
index cf7e072a4..ec748072f 100644
--- a/src/libs/vpropertyexplorer/vpropertytreeview_p.h
+++ b/src/libs/vpropertyexplorer/vpropertytreeview_p.h
@@ -38,7 +38,7 @@ public:
     VPropertyDelegate* PropertyDelegate;
 
     //! Constructor
-    VPropertyTreeViewPrivate(VPropertyDelegate* delegate)
+    explicit VPropertyTreeViewPrivate(VPropertyDelegate* delegate)
         : PropertyDelegate(delegate) {}
 
     //! Constructor
diff --git a/src/libs/vpropertyexplorer/vstandardpropertyfactory.h b/src/libs/vpropertyexplorer/vstandardpropertyfactory.h
index 7607e2e6e..4c4dd6261 100644
--- a/src/libs/vpropertyexplorer/vstandardpropertyfactory.h
+++ b/src/libs/vpropertyexplorer/vstandardpropertyfactory.h
@@ -41,7 +41,7 @@ public:
 
     //! Constructor
     //! \param manager Registers this factory at the manager for all it's types
-    VStandardPropertyFactory(VPropertyFactoryManager* manager);
+    explicit VStandardPropertyFactory(VPropertyFactoryManager* manager);
 
     //! Creates a new property of a certain type and assigns a name and description (otionally)
     //! \param type The type of the property as string
diff --git a/src/libs/vtools/visualization/visualization.h b/src/libs/vtools/visualization/visualization.h
index f5a1193e5..ad3dc7b5e 100644
--- a/src/libs/vtools/visualization/visualization.h
+++ b/src/libs/vtools/visualization/visualization.h
@@ -43,7 +43,7 @@ class Visualization : public QObject
 {
     Q_OBJECT
 public:
-    Visualization(const VContainer *data);
+    explicit Visualization(const VContainer *data);
     virtual ~Visualization() Q_DECL_OVERRIDE;
 
     virtual void RefreshGeometry()=0;
diff --git a/src/libs/vwidgets/vgraphicssimpletextitem.h b/src/libs/vwidgets/vgraphicssimpletextitem.h
index ef7ff4693..9605d6fbb 100644
--- a/src/libs/vwidgets/vgraphicssimpletextitem.h
+++ b/src/libs/vwidgets/vgraphicssimpletextitem.h
@@ -40,7 +40,7 @@ class VGraphicsSimpleTextItem : public QObject, public QGraphicsSimpleTextItem
 {
     Q_OBJECT
 public:
-    VGraphicsSimpleTextItem(QGraphicsItem *parent = nullptr);
+    explicit VGraphicsSimpleTextItem(QGraphicsItem *parent = nullptr);
     VGraphicsSimpleTextItem( const QString & text, QGraphicsItem *parent = nullptr );
     virtual ~VGraphicsSimpleTextItem() Q_DECL_OVERRIDE;
 
diff --git a/src/libs/vwidgets/vmaingraphicsview.h b/src/libs/vwidgets/vmaingraphicsview.h
index a10007e71..755bbd909 100644
--- a/src/libs/vwidgets/vmaingraphicsview.h
+++ b/src/libs/vwidgets/vmaingraphicsview.h
@@ -69,7 +69,7 @@ class GraphicsViewZoom : public QObject
 {
     Q_OBJECT
 public:
-    GraphicsViewZoom(QGraphicsView* view);
+    explicit GraphicsViewZoom(QGraphicsView* view);
     void gentle_zoom(double factor);
     void set_modifiers(Qt::KeyboardModifiers modifiers);
     void set_zoom_factor_base(double value);
diff --git a/src/libs/vwidgets/vwidgetpopup.h b/src/libs/vwidgets/vwidgetpopup.h
index aadb6cc19..8f6153c44 100644
--- a/src/libs/vwidgets/vwidgetpopup.h
+++ b/src/libs/vwidgets/vwidgetpopup.h
@@ -51,7 +51,7 @@ public:
         If \a parent not specified (default), then popup widget gets
         attribute Qt::WA_DeleteOnClose and will be deleted after close.
       */
-    VWidgetPopup(QWidget *parent = 0);
+    explicit VWidgetPopup(QWidget *parent = 0);
 
     /** Sets widget to be popped up to \a widget.
         If \a own is true then the widget will be reparented to the popup widget.
diff --git a/src/test/ValentinaTest/tst_tapecommandline.h b/src/test/ValentinaTest/tst_tapecommandline.h
index 98f97a7dd..a1ab5b18f 100644
--- a/src/test/ValentinaTest/tst_tapecommandline.h
+++ b/src/test/ValentinaTest/tst_tapecommandline.h
@@ -35,7 +35,7 @@ class TST_TapeCommandLine : public AbstractTest
 {
     Q_OBJECT
 public:
-    TST_TapeCommandLine(QObject *parent = 0);
+    explicit TST_TapeCommandLine(QObject *parent = 0);
 
 private slots:
     void init();
diff --git a/src/test/ValentinaTest/tst_valentinacommandline.h b/src/test/ValentinaTest/tst_valentinacommandline.h
index 974a31a4a..148ede2ec 100644
--- a/src/test/ValentinaTest/tst_valentinacommandline.h
+++ b/src/test/ValentinaTest/tst_valentinacommandline.h
@@ -35,7 +35,7 @@ class TST_ValentinaCommandLine : public AbstractTest
 {
     Q_OBJECT
 public:
-    TST_ValentinaCommandLine(QObject *parent = 0);
+    explicit TST_ValentinaCommandLine(QObject *parent = 0);
 
 private slots:
     void init();
diff --git a/src/test/ValentinaTest/tst_vlayoutdetail.h b/src/test/ValentinaTest/tst_vlayoutdetail.h
index 1fe004a52..2b0f08509 100644
--- a/src/test/ValentinaTest/tst_vlayoutdetail.h
+++ b/src/test/ValentinaTest/tst_vlayoutdetail.h
@@ -35,7 +35,7 @@ class TST_VLayoutDetail : public AbstractTest
 {
     Q_OBJECT
 public:
-    TST_VLayoutDetail(QObject *parent = 0);
+    explicit TST_VLayoutDetail(QObject *parent = 0);
 
 private slots:
     void RemoveDublicates() const;