diff --git a/src/libs/vdxf/dxflib/dl_creationinterface.h b/src/libs/vdxf/dxflib/dl_creationinterface.h
index e5c980eea..fa7d0688c 100644
--- a/src/libs/vdxf/dxflib/dl_creationinterface.h
+++ b/src/libs/vdxf/dxflib/dl_creationinterface.h
@@ -56,21 +56,6 @@ public:
         delete extrusion;
     }
 
-    DL_CreationInterface(const DL_CreationInterface &L) : extrusion(L.extrusion), attributes(L.attributes)
-    {
-    }
-
-    DL_CreationInterface & operator=(const DL_CreationInterface &L)
-    {
-        extrusion = L.extrusion;
-        attributes = L.attributes;
-
-        if ( &L == this )
-        {
-            return *this;
-        }
-    }
-
     /**
      * Called for every code / value tuple of the DXF file. The complete DXF file
      * contents can be handled by the implemetation of this function.
@@ -380,6 +365,9 @@ public:
         return extrusion;
     }
 
+private:
+    Q_DISABLE_COPY(DL_CreationInterface);
+
 protected:
     DL_Extrusion *extrusion;
     DL_Attributes attributes;
diff --git a/src/libs/vdxf/dxflib/dl_dxf.h b/src/libs/vdxf/dxflib/dl_dxf.h
index 460b5e61b..80dba39ef 100644
--- a/src/libs/vdxf/dxflib/dl_dxf.h
+++ b/src/libs/vdxf/dxflib/dl_dxf.h
@@ -119,103 +119,6 @@ public:
     DL_Dxf();
     ~DL_Dxf();
 
-    DL_Dxf(const DL_Dxf &L)
-        : version(L.version),
-        polylineLayer(L.polylineLayer),
-        vertices(L.vertices),
-        maxVertices(L.maxVertices),
-        vertexIndex(L.vertexIndex),
-        knots(L.knots),
-        maxKnots(L.maxKnots),
-        knotIndex(L.knotIndex),
-
-        weights(L.weights),
-        weightIndex(L.weightIndex),
-
-        controlPoints(L.controlPoints),
-        maxControlPoints(L.maxControlPoints),
-        controlPointIndex(L.controlPointIndex),
-
-        fitPoints(L.fitPoints),
-        maxFitPoints(L.maxFitPoints),
-        fitPointIndex(L.fitPointIndex),
-
-        leaderVertices(L.leaderVertices),
-        maxLeaderVertices(L.maxLeaderVertices),
-        leaderVertexIndex(L.leaderVertexIndex),
-
-        firstHatchLoop(L.firstHatchLoop),
-        hatchEdge(L.hatchEdge),
-        hatchEdges(L.hatchEdges),
-
-        xRecordHandle(L.xRecordHandle),
-        xRecordValues(L.xRecordValues),
-
-        groupCodeTmp(L.groupCodeTmp),
-        groupCode(L.groupCode),
-        groupValue(L.groupValue),
-        currentObjectType(L.currentObjectType),
-        settingKey(L.settingKey),
-        values(L.values),
-        firstCall(L.firstCall),
-        attrib(L.attrib),
-        libVersion(L.libVersion),
-        appDictionaryHandle(L.appDictionaryHandle),
-        styleHandleStd(L.styleHandleStd)
-    {
-    }
-
-    DL_Dxf & operator=(const DL_Dxf &L)
-    {
-        version = L.version;
-        polylineLayer = L.polylineLayer;
-        vertices = L.vertices;
-        maxVertices = L.maxVertices;
-        vertexIndex = L.vertexIndex;
-        knots = L.knots;
-        maxKnots = L.maxKnots;
-        knotIndex = L.knotIndex;
-
-        weights = L.weights;
-        weightIndex = L.weightIndex;
-
-        controlPoints = L.controlPoints;
-        maxControlPoints = L.maxControlPoints;
-        controlPointIndex = L.controlPointIndex;
-
-        fitPoints = L.fitPoints;
-        maxFitPoints = L.maxFitPoints;
-        fitPointIndex = L.fitPointIndex;
-
-        leaderVertices = L.leaderVertices;
-        maxLeaderVertices = L.maxLeaderVertices;
-        leaderVertexIndex = L.leaderVertexIndex;
-
-        firstHatchLoop = L.firstHatchLoop;
-        hatchEdge = L.hatchEdge;
-        hatchEdges = L.hatchEdges;
-
-        xRecordHandle = L.xRecordHandle;
-        xRecordValues = L.xRecordValues;
-
-        groupCodeTmp = L.groupCodeTmp;
-        groupCode = L.groupCode;
-        groupValue = L.groupValue;
-        currentObjectType = L.currentObjectType;
-        settingKey = L.settingKey;
-        values = L.values;
-        firstCall = L.firstCall;
-        attrib = L.attrib;
-        libVersion = L.libVersion;
-        appDictionaryHandle = L.appDictionaryHandle;
-        styleHandleStd = L.styleHandleStd;
-
-        if ( &L == this )
-        {
-            return *this;
-        }
-    }
-
     bool in(const std::string& file,
             DL_CreationInterface* creationInterface);
     bool readDxfGroups(FILE* fp,
@@ -554,6 +457,7 @@ public:
     }
 
 private:
+    Q_DISABLE_COPY(DL_Dxf);
     DL_Codes::version version;
 
     std::string polylineLayer;
diff --git a/src/libs/vdxf/dxflib/dl_entities.h b/src/libs/vdxf/dxflib/dl_entities.h
index 83a188e31..2e2f01325 100644
--- a/src/libs/vdxf/dxflib/dl_entities.h
+++ b/src/libs/vdxf/dxflib/dl_entities.h
@@ -110,31 +110,6 @@ struct DXFLIB_EXPORT DL_LinetypeData
     {
     }
 
-    DL_LinetypeData(const DL_LinetypeData &L)
-        : name(L.name),
-          description(L.description),
-          flags(L.flags),
-          numberOfDashes(L.numberOfDashes),
-          patternLength(L.patternLength),
-          pattern(L.pattern)
-    {
-    }
-
-    DL_LinetypeData & operator=(const DL_LinetypeData &L)
-    {
-        name = L.name;
-        description = L.description;
-        flags = L.flags;
-        numberOfDashes = L.numberOfDashes;
-        patternLength = L.patternLength;
-        pattern = L.pattern;
-
-        if ( &L == this )
-        {
-            return *this;
-        }
-    }
-
     /** Linetype name */
     std::string name;
     /** Linetype description */
@@ -147,6 +122,9 @@ struct DXFLIB_EXPORT DL_LinetypeData
     double patternLength;
     /** Pattern */
     double* pattern;
+
+private:
+    Q_DISABLE_COPY(DL_LinetypeData);
 };
 
 
@@ -544,12 +522,12 @@ struct DXFLIB_EXPORT DL_SplineData
         nControl(nControl),
         nFit(nFit),
         flags(flags),
-        tangentStartX(),
-        tangentStartY(),
-        tangentStartZ(),
-        tangentEndX(),
-        tangentEndY(),
-        tangentEndZ()
+        tangentStartX(0.0),
+        tangentStartY(0.0),
+        tangentStartZ(0.0),
+        tangentEndX(0.0),
+        tangentEndY(0.0),
+        tangentEndZ(0.0)
     {
     }
 
@@ -1462,11 +1440,11 @@ struct DXFLIB_EXPORT DL_HatchEdgeData
      * Default constructor.
      */
     DL_HatchEdgeData() : defined(false), x1(0.0), y1(0.0), x2(0.0), y2(0.0),
-        type(), cx(), cy(), radius(), angle1(), angle2(), ccw(),
-        mx(), my(), ratio(), degree(), rational(), periodic(),
-        nKnots(), nControl(), nFit(), controlPoints(), knots(),
-        weights(), fitPoints(), startTangentX(), startTangentY(),
-        endTangentX(), endTangentY(), vertices()
+        type(0), cx(0.0), cy(0.0), radius(0.0), angle1(0.0), angle2(0.0), ccw(),
+        mx(0.0), my(0.0), ratio(0.0), degree(0), rational(), periodic(),
+        nKnots(0), nControl(0), nFit(0), controlPoints(), knots(),
+        weights(), fitPoints(), startTangentX(0.0), startTangentY(0.0),
+        endTangentX(0.0), endTangentY(0.0), vertices()
     {
     }
 
@@ -1482,11 +1460,11 @@ struct DXFLIB_EXPORT DL_HatchEdgeData
         x2(x2),
         y2(y2),
         type(1),
-        cx(), cy(), radius(), angle1(), angle2(), ccw(),
-        mx(), my(), ratio(), degree(), rational(), periodic(),
-        nKnots(), nControl(), nFit(), controlPoints(), knots(),
-        weights(), fitPoints(), startTangentX(), startTangentY(),
-        endTangentX(), endTangentY(), vertices()
+        cx(0.0), cy(0.0), radius(0.0), angle1(0.0), angle2(0.0), ccw(),
+        mx(0.0), my(0.0), ratio(0.0), degree(0), rational(), periodic(),
+        nKnots(0), nControl(0), nFit(0), controlPoints(), knots(),
+        weights(), fitPoints(), startTangentX(0.0), startTangentY(0.0),
+        endTangentX(0.0), endTangentY(0.0), vertices()
     {
     }
 
@@ -1507,10 +1485,10 @@ struct DXFLIB_EXPORT DL_HatchEdgeData
         angle1(angle1),
         angle2(angle2),
         ccw(ccw),
-        mx(), my(), ratio(), degree(), rational(), periodic(),
-        nKnots(), nControl(), nFit(), controlPoints(), knots(),
-        weights(), fitPoints(), startTangentX(), startTangentY(),
-        endTangentX(), endTangentY(), vertices()
+        mx(0.0), my(0.0), ratio(0.0), degree(0), rational(), periodic(),
+        nKnots(0), nControl(0), nFit(0), controlPoints(), knots(),
+        weights(), fitPoints(), startTangentX(0.0), startTangentY(0.0),
+        endTangentX(0.0), endTangentY(0.0), vertices()
     {
     }
 
@@ -1535,10 +1513,10 @@ struct DXFLIB_EXPORT DL_HatchEdgeData
         mx(mx),
         my(my),
         ratio(ratio),
-        degree(), rational(), periodic(),
-        nKnots(), nControl(), nFit(), controlPoints(), knots(),
-        weights(), fitPoints(), startTangentX(), startTangentY(),
-        endTangentX(), endTangentY(), vertices()
+        degree(0), rational(), periodic(),
+        nKnots(0), nControl(0), nFit(0), controlPoints(), knots(),
+        weights(), fitPoints(), startTangentX(0.0), startTangentY(0.0),
+        endTangentX(0.0), endTangentY(0.0), vertices()
     {
     }