diff --git a/src/container/calculator.h b/src/container/calculator.h
index 6618e310a..00b0fe7ef 100644
--- a/src/container/calculator.h
+++ b/src/container/calculator.h
@@ -42,8 +42,8 @@ public:
      * @brief Calculator class constructor.
      * @param data pointer to a variable container.
      */
-    explicit Calculator(const VContainer *data):errorMsg(0), token(QString()), tok(0), token_type(0), prog(QString()),
-        index(0), data(data), debugFormula(QString()){}
+    explicit Calculator(const VContainer *data):errorMsg(nullptr), token(QString()), tok(0), token_type(0),
+        prog(QString()), index(0), data(data), debugFormula(QString()){}
     /**
      * @brief eval calculate formula.
      * @param prog string of formula.
diff --git a/src/container/vcontainer.h b/src/container/vcontainer.h
index 0fb81df09..eee7edbda 100644
--- a/src/container/vcontainer.h
+++ b/src/container/vcontainer.h
@@ -76,7 +76,7 @@ public:
     template <typename T>
     const T GeometricObject(quint32 id) const
     {
-        VGObject *gObj = 0;
+        VGObject *gObj = nullptr;
         if (gObjects.contains(id))
         {
             gObj = gObjects.value(id);
diff --git a/src/dialogs/app/configdialog.cpp b/src/dialogs/app/configdialog.cpp
index 1cfdb228b..283ed3da3 100644
--- a/src/dialogs/app/configdialog.cpp
+++ b/src/dialogs/app/configdialog.cpp
@@ -29,7 +29,7 @@
 #include "configdialog.h"
 
 ConfigDialog::ConfigDialog(QWidget *parent) :
-    QDialog(parent), contentsWidget(0), pagesWidget(0), configurationPage(0), patternPage(0)
+    QDialog(parent), contentsWidget(nullptr), pagesWidget(nullptr), configurationPage(nullptr), patternPage(nullptr)
 {
     contentsWidget = new QListWidget;
     Q_CHECK_PTR(contentsWidget);
diff --git a/src/dialogs/app/configdialog.h b/src/dialogs/app/configdialog.h
index 9acc653aa..d1bfef44f 100644
--- a/src/dialogs/app/configdialog.h
+++ b/src/dialogs/app/configdialog.h
@@ -40,7 +40,7 @@ class ConfigDialog : public QDialog
 {
     Q_OBJECT
 public:
-    explicit ConfigDialog(QWidget *parent = 0);
+    explicit ConfigDialog(QWidget *parent = nullptr);
 public slots:
     void              changePage(QListWidgetItem *current, QListWidgetItem *previous);
 protected:
diff --git a/src/dialogs/app/dialoghistory.h b/src/dialogs/app/dialoghistory.h
index 3a6f797c7..9b1337df4 100644
--- a/src/dialogs/app/dialoghistory.h
+++ b/src/dialogs/app/dialoghistory.h
@@ -50,7 +50,7 @@ public:
                        * @param doc dom document container
                        * @param parent parent widget
                        */
-                      DialogHistory(VContainer *data, VPattern *doc, QWidget *parent = 0);
+                      DialogHistory(VContainer *data, VPattern *doc, QWidget *parent = nullptr);
     virtual           ~DialogHistory();
 public slots:
     /**
diff --git a/src/dialogs/app/dialogincrements.cpp b/src/dialogs/app/dialogincrements.cpp
index 048fce127..796c4ee21 100644
--- a/src/dialogs/app/dialogincrements.cpp
+++ b/src/dialogs/app/dialogincrements.cpp
@@ -419,8 +419,8 @@ void DialogIncrements::AddIncrementToFile(quint32 id, QString name, qreal base,
 
 void DialogIncrements::cellChanged ( qint32 row, qint32 column )
 {
-    QTableWidgetItem *item = 0;
-    QTableWidgetItem *itemName = 0;
+    QTableWidgetItem *item = nullptr;
+    QTableWidgetItem *itemName = nullptr;
     quint32 id;
     QDomElement domElement;
     this->row = row;
diff --git a/src/dialogs/app/dialogincrements.h b/src/dialogs/app/dialogincrements.h
index 7ed6977b3..7ea4841a4 100644
--- a/src/dialogs/app/dialogincrements.h
+++ b/src/dialogs/app/dialogincrements.h
@@ -50,7 +50,7 @@ public:
                           * @param doc dom document container
                           * @param parent parent widget
                           */
-                         DialogIncrements(VContainer *data, VPattern *doc, QWidget *parent = 0);
+                         DialogIncrements(VContainer *data, VPattern *doc, QWidget *parent = nullptr);
                          ~DialogIncrements();
 public slots:
     /**
diff --git a/src/dialogs/app/dialogindividualmeasurements.h b/src/dialogs/app/dialogindividualmeasurements.h
index 0e87bb685..bcde13c66 100644
--- a/src/dialogs/app/dialogindividualmeasurements.h
+++ b/src/dialogs/app/dialogindividualmeasurements.h
@@ -40,7 +40,7 @@ class DialogIndividualMeasurements : public QDialog
     Q_OBJECT
 
 public:
-    explicit DialogIndividualMeasurements(QWidget *parent = 0);
+    explicit DialogIndividualMeasurements(QWidget *parent = nullptr);
     ~DialogIndividualMeasurements();
     QString name() const;
     QString tablePath() const;
diff --git a/src/dialogs/app/dialogmeasurements.h b/src/dialogs/app/dialogmeasurements.h
index 73945dda9..2a098c32c 100644
--- a/src/dialogs/app/dialogmeasurements.h
+++ b/src/dialogs/app/dialogmeasurements.h
@@ -49,7 +49,7 @@ class DialogMeasurements : public QDialog
 {
     Q_OBJECT
 public:
-    explicit DialogMeasurements(QWidget *parent = 0);
+    explicit DialogMeasurements(QWidget *parent = nullptr);
     ~DialogMeasurements();
     Measurements::Type type() const;
 private:
diff --git a/src/dialogs/app/dialogpatternproperties.h b/src/dialogs/app/dialogpatternproperties.h
index 5efd8a28a..9bd8c11f9 100644
--- a/src/dialogs/app/dialogpatternproperties.h
+++ b/src/dialogs/app/dialogpatternproperties.h
@@ -40,7 +40,7 @@ class DialogPatternProperties : public QDialog
 {
     Q_OBJECT
 public:
-    DialogPatternProperties(VPattern *doc, QWidget *parent = 0);
+    DialogPatternProperties(VPattern *doc, QWidget *parent = nullptr);
     virtual ~DialogPatternProperties();
 signals:
     void         haveChange();
diff --git a/src/dialogs/app/dialogstandardmeasurements.h b/src/dialogs/app/dialogstandardmeasurements.h
index 2a7156f50..d89ed2593 100644
--- a/src/dialogs/app/dialogstandardmeasurements.h
+++ b/src/dialogs/app/dialogstandardmeasurements.h
@@ -39,7 +39,7 @@ class DialogStandardMeasurements : public QDialog
 {
     Q_OBJECT
 public:
-    explicit DialogStandardMeasurements(QWidget *parent = 0);
+    explicit DialogStandardMeasurements(QWidget *parent = nullptr);
     ~DialogStandardMeasurements();
     QString name() const;
     QString tablePath() const;
diff --git a/src/dialogs/app/pages.h b/src/dialogs/app/pages.h
index dc52a36f4..ef8e96e1c 100644
--- a/src/dialogs/app/pages.h
+++ b/src/dialogs/app/pages.h
@@ -35,7 +35,7 @@ class ConfigurationPage : public QWidget
 {
     Q_OBJECT
 public:
-    ConfigurationPage(QWidget *parent = 0);
+    ConfigurationPage(QWidget *parent = nullptr);
     void      Apply();
 public slots:
     void      LangChenged();
@@ -54,7 +54,7 @@ class PatternPage : public QWidget
 {
     Q_OBJECT
 public:
-    PatternPage(QWidget *parent = 0);
+    PatternPage(QWidget *parent = nullptr);
     void      Apply();
 private:
     Q_DISABLE_COPY(PatternPage)
diff --git a/src/dialogs/tools/dialogalongline.h b/src/dialogs/tools/dialogalongline.h
index 693328fb0..0edbf7f55 100644
--- a/src/dialogs/tools/dialogalongline.h
+++ b/src/dialogs/tools/dialogalongline.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogAlongLine(const VContainer *data, QWidget *parent = 0);
+    DialogAlongLine(const VContainer *data, QWidget *parent = nullptr);
     ~DialogAlongLine();
     /**
      * @brief getPointName return name of point
diff --git a/src/dialogs/tools/dialogarc.cpp b/src/dialogs/tools/dialogarc.cpp
index de4898881..d8fcacda1 100644
--- a/src/dialogs/tools/dialogarc.cpp
+++ b/src/dialogs/tools/dialogarc.cpp
@@ -34,7 +34,7 @@
 
 DialogArc::DialogArc(const VContainer *data, QWidget *parent)
     :DialogTool(data, parent), ui(new Ui::DialogArc), flagRadius(false), flagF1(false), flagF2(false),
-    timerRadius(0), timerF1(0), timerF2(0), center(0), radius(QString()), f1(QString()), f2(QString())
+    timerRadius(nullptr), timerF1(nullptr), timerF2(nullptr), center(0), radius(QString()), f1(QString()), f2(QString())
 {
     ui->setupUi(this);
 
diff --git a/src/dialogs/tools/dialogarc.h b/src/dialogs/tools/dialogarc.h
index f1366f9e1..03343cc39 100644
--- a/src/dialogs/tools/dialogarc.h
+++ b/src/dialogs/tools/dialogarc.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogArc(const VContainer *data, QWidget *parent = 0);
+    DialogArc(const VContainer *data, QWidget *parent = nullptr);
     ~DialogArc();
     /**
      * @brief GetCenter return id of center point
diff --git a/src/dialogs/tools/dialogbisector.h b/src/dialogs/tools/dialogbisector.h
index ba581956d..5488ce972 100644
--- a/src/dialogs/tools/dialogbisector.h
+++ b/src/dialogs/tools/dialogbisector.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogBisector(const VContainer *data, QWidget *parent = 0);
+    DialogBisector(const VContainer *data, QWidget *parent = nullptr);
     ~DialogBisector();
     /**
      * @brief getPointName return name of point
diff --git a/src/dialogs/tools/dialogcutarc.h b/src/dialogs/tools/dialogcutarc.h
index 4e296c416..9b9d285c3 100644
--- a/src/dialogs/tools/dialogcutarc.h
+++ b/src/dialogs/tools/dialogcutarc.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogCutArc(const VContainer *data, QWidget *parent = 0);
+    DialogCutArc(const VContainer *data, QWidget *parent = nullptr);
     ~DialogCutArc();
     /**
      * @brief getPointName return name point on arc
diff --git a/src/dialogs/tools/dialogcutspline.h b/src/dialogs/tools/dialogcutspline.h
index c7e9ef3f5..f5e507e2c 100644
--- a/src/dialogs/tools/dialogcutspline.h
+++ b/src/dialogs/tools/dialogcutspline.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogCutSpline(const VContainer *data, QWidget *parent = 0);
+    DialogCutSpline(const VContainer *data, QWidget *parent = nullptr);
     ~DialogCutSpline();
     /**
      * @brief getPointName return name of point
diff --git a/src/dialogs/tools/dialogcutsplinepath.h b/src/dialogs/tools/dialogcutsplinepath.h
index 0137e7f6c..0accc6d67 100644
--- a/src/dialogs/tools/dialogcutsplinepath.h
+++ b/src/dialogs/tools/dialogcutsplinepath.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogCutSplinePath(const VContainer *data, QWidget *parent = 0);
+    DialogCutSplinePath(const VContainer *data, QWidget *parent = nullptr);
     ~DialogCutSplinePath();
     /**
      * @brief getPointName return name of point
diff --git a/src/dialogs/tools/dialogdetail.h b/src/dialogs/tools/dialogdetail.h
index fec51637f..bf39910b1 100644
--- a/src/dialogs/tools/dialogdetail.h
+++ b/src/dialogs/tools/dialogdetail.h
@@ -44,7 +44,7 @@ public:
                       * @param data container with data
                       * @param parent parent widget
                       */
-                     DialogDetail(const VContainer *data, QWidget *parent = 0);
+                     DialogDetail(const VContainer *data, QWidget *parent = nullptr);
     /**
      * @brief getDetails return detail
      * @return detail
diff --git a/src/dialogs/tools/dialogendline.h b/src/dialogs/tools/dialogendline.h
index 8bfcc1d6b..05ce3c82c 100644
--- a/src/dialogs/tools/dialogendline.h
+++ b/src/dialogs/tools/dialogendline.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogEndLine(const VContainer *data, QWidget *parent = 0);
+    DialogEndLine(const VContainer *data, QWidget *parent = nullptr);
     ~DialogEndLine();
     /**
      * @brief getPointName return name of point
diff --git a/src/dialogs/tools/dialogheight.h b/src/dialogs/tools/dialogheight.h
index 9c718d626..8fd4f9a25 100644
--- a/src/dialogs/tools/dialogheight.h
+++ b/src/dialogs/tools/dialogheight.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogHeight(const VContainer *data, QWidget *parent = 0);
+    DialogHeight(const VContainer *data, QWidget *parent = nullptr);
     ~DialogHeight();
     /**
      * @brief getPointName return name of point
diff --git a/src/dialogs/tools/dialogline.h b/src/dialogs/tools/dialogline.h
index ec53ffcdf..2df217fce 100644
--- a/src/dialogs/tools/dialogline.h
+++ b/src/dialogs/tools/dialogline.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogLine(const VContainer *data, QWidget *parent = 0);
+    DialogLine(const VContainer *data, QWidget *parent = nullptr);
     ~DialogLine();
     /**
      * @brief getFirstPoint return id first point
diff --git a/src/dialogs/tools/dialoglineintersect.h b/src/dialogs/tools/dialoglineintersect.h
index dc0edbf22..421f5d0aa 100644
--- a/src/dialogs/tools/dialoglineintersect.h
+++ b/src/dialogs/tools/dialoglineintersect.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogLineIntersect(const VContainer *data, QWidget *parent = 0);
+    DialogLineIntersect(const VContainer *data, QWidget *parent = nullptr);
     ~DialogLineIntersect();
     /**
      * @brief getP1Line1 return id first point of first line
diff --git a/src/dialogs/tools/dialognormal.h b/src/dialogs/tools/dialognormal.h
index 11aef3280..9d747b9b9 100644
--- a/src/dialogs/tools/dialognormal.h
+++ b/src/dialogs/tools/dialognormal.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogNormal(const VContainer *data, QWidget *parent = 0);
+    DialogNormal(const VContainer *data, QWidget *parent = nullptr);
     ~DialogNormal();
     /**
      * @brief getPointName return name of point
diff --git a/src/dialogs/tools/dialogpointofcontact.h b/src/dialogs/tools/dialogpointofcontact.h
index f6a80ab6c..b569cae72 100644
--- a/src/dialogs/tools/dialogpointofcontact.h
+++ b/src/dialogs/tools/dialogpointofcontact.h
@@ -44,7 +44,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogPointOfContact(const VContainer *data, QWidget *parent = 0);
+    DialogPointOfContact(const VContainer *data, QWidget *parent = nullptr);
     /**
      * @brief getPointName return name of point
      * @return name
diff --git a/src/dialogs/tools/dialogpointofintersection.h b/src/dialogs/tools/dialogpointofintersection.h
index dfa8d51c4..2a60ca2ad 100644
--- a/src/dialogs/tools/dialogpointofintersection.h
+++ b/src/dialogs/tools/dialogpointofintersection.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogPointOfIntersection(const VContainer *data, QWidget *parent = 0);
+    DialogPointOfIntersection(const VContainer *data, QWidget *parent = nullptr);
     ~DialogPointOfIntersection();
     /**
      * @brief getPointName return name of point
diff --git a/src/dialogs/tools/dialogshoulderpoint.h b/src/dialogs/tools/dialogshoulderpoint.h
index 642f742d3..30342ee81 100644
--- a/src/dialogs/tools/dialogshoulderpoint.h
+++ b/src/dialogs/tools/dialogshoulderpoint.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogShoulderPoint(const VContainer *data, QWidget *parent = 0);
+    DialogShoulderPoint(const VContainer *data, QWidget *parent = nullptr);
     ~DialogShoulderPoint();
     /**
      * @brief getPointName return name of point
diff --git a/src/dialogs/tools/dialogsinglepoint.h b/src/dialogs/tools/dialogsinglepoint.h
index f3d4d6e33..a4f994043 100644
--- a/src/dialogs/tools/dialogsinglepoint.h
+++ b/src/dialogs/tools/dialogsinglepoint.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogSinglePoint(const VContainer *data, QWidget *parent = 0);
+    DialogSinglePoint(const VContainer *data, QWidget *parent = nullptr);
     ~DialogSinglePoint();
     /**
      * @brief setData set name and point
diff --git a/src/dialogs/tools/dialogspline.h b/src/dialogs/tools/dialogspline.h
index 40e0bebac..e42cc1388 100644
--- a/src/dialogs/tools/dialogspline.h
+++ b/src/dialogs/tools/dialogspline.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogSpline(const VContainer *data, QWidget *parent = 0);
+    DialogSpline(const VContainer *data, QWidget *parent = nullptr);
     ~DialogSpline();
     /**
      * @brief getP1 return id first point of spline
diff --git a/src/dialogs/tools/dialogsplinepath.h b/src/dialogs/tools/dialogsplinepath.h
index 5024c143a..ad1fcb708 100644
--- a/src/dialogs/tools/dialogsplinepath.h
+++ b/src/dialogs/tools/dialogsplinepath.h
@@ -49,7 +49,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogSplinePath(const VContainer *data, QWidget *parent = 0);
+    DialogSplinePath(const VContainer *data, QWidget *parent = nullptr);
     ~DialogSplinePath();
     /**
      * @brief GetPath return spline path
diff --git a/src/dialogs/tools/dialogtool.cpp b/src/dialogs/tools/dialogtool.cpp
index 353ef34f4..d2b23fc1b 100644
--- a/src/dialogs/tools/dialogtool.cpp
+++ b/src/dialogs/tools/dialogtool.cpp
@@ -34,11 +34,12 @@
 #include <QtWidgets>
 
 DialogTool::DialogTool(const VContainer *data, QWidget *parent)
-    :QDialog(parent), data(data), isInitialized(false), flagName(true), flagFormula(true), timerFormula(0), bOk(0),
-      spinBoxAngle(0), lineEditFormula(0), listWidget(0), labelResultCalculation(0), labelDescription(0),
-      labelEditNamePoint(0), labelEditFormula(0), radioButtonSizeGrowth(0), radioButtonStandardTable(0),
-      radioButtonIncrements(0), radioButtonLengthLine(0), radioButtonLengthArc(0), radioButtonLengthCurve(0),
-      lineStyles(QStringList())
+    :QDialog(parent), data(data), isInitialized(false), flagName(true), flagFormula(true), timerFormula(nullptr),
+      bOk(nullptr), spinBoxAngle(nullptr), lineEditFormula(nullptr), listWidget(nullptr),
+      labelResultCalculation(nullptr), labelDescription(nullptr), labelEditNamePoint(nullptr),
+      labelEditFormula(nullptr), radioButtonSizeGrowth(nullptr), radioButtonStandardTable(nullptr),
+      radioButtonIncrements(nullptr), radioButtonLengthLine(nullptr), radioButtonLengthArc(nullptr),
+      radioButtonLengthCurve(nullptr), lineStyles(QStringList())
 {
     Q_CHECK_PTR(data);
     timerFormula = new QTimer(this);
diff --git a/src/dialogs/tools/dialogtool.h b/src/dialogs/tools/dialogtool.h
index 4e1cf2079..ee1abf5df 100644
--- a/src/dialogs/tools/dialogtool.h
+++ b/src/dialogs/tools/dialogtool.h
@@ -63,7 +63,7 @@ public:
                       * @param data container with data
                       * @param parent parent widget
                       */
-                     DialogTool(const VContainer *data, QWidget *parent = 0);
+                     DialogTool(const VContainer *data, QWidget *parent = nullptr);
     virtual          ~DialogTool() {}
 signals:
     /**
diff --git a/src/dialogs/tools/dialogtriangle.h b/src/dialogs/tools/dialogtriangle.h
index c1667fc43..cbacec9ac 100644
--- a/src/dialogs/tools/dialogtriangle.h
+++ b/src/dialogs/tools/dialogtriangle.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogTriangle(const VContainer *data, QWidget *parent = 0);
+    DialogTriangle(const VContainer *data, QWidget *parent = nullptr);
     ~DialogTriangle();
     /**
      * @brief getAxisP1Id return id first point of axis
diff --git a/src/dialogs/tools/dialoguniondetails.h b/src/dialogs/tools/dialoguniondetails.h
index a525c0aba..e972de851 100644
--- a/src/dialogs/tools/dialoguniondetails.h
+++ b/src/dialogs/tools/dialoguniondetails.h
@@ -48,7 +48,7 @@ public:
      * @param data container with data
      * @param parent parent widget
      */
-    DialogUnionDetails(const VContainer *data, QWidget *parent = 0);
+    DialogUnionDetails(const VContainer *data, QWidget *parent = nullptr);
     ~DialogUnionDetails();
     /**
      * @brief getD1 return id first detail
diff --git a/src/exception/vexception.h b/src/exception/vexception.h
index e25f6b9f1..ea0145ce7 100644
--- a/src/exception/vexception.h
+++ b/src/exception/vexception.h
@@ -79,7 +79,7 @@ public:
      * @brief CriticalMessageBox show Critical Message Box.
      * @param situation main text message box.
      */
-    virtual void    CriticalMessageBox(const QString &situation, QWidget *parent = 0) const;
+    virtual void    CriticalMessageBox(const QString &situation, QWidget *parent = nullptr) const;
 protected:
     /**
      * @brief what string with error
diff --git a/src/mainwindow.cpp b/src/mainwindow.cpp
index ccbf524ff..f72d42447 100644
--- a/src/mainwindow.cpp
+++ b/src/mainwindow.cpp
@@ -48,11 +48,11 @@
 
 
 MainWindow::MainWindow(QWidget *parent)
-    :QMainWindow(parent), ui(new Ui::MainWindow), pattern(0), doc(0), tool(Tool::ArrowTool), currentScene(0),
-      sceneDraw(0), sceneDetails(0), mouseCoordinate(0), helpLabel(0), view(0), isInitialized(false), dialogTable(0),
-      dialogTool(0), dialogHistory(0), comboBoxDraws(0), curFile(QString()), mode(Draw::Calculation),
-      currentDrawIndex(0), currentToolBoxIndex(0), drawMode(true), recentFileActs{0,0,0,0,0}, separatorAct(0),
-      autoSaveTimer(0)
+    :QMainWindow(parent), ui(new Ui::MainWindow), pattern(nullptr), doc(nullptr), tool(Tool::ArrowTool),
+      currentScene(nullptr), sceneDraw(nullptr), sceneDetails(nullptr), mouseCoordinate(nullptr), helpLabel(nullptr),
+      view(nullptr), isInitialized(false), dialogTable(0), dialogTool(nullptr), dialogHistory(nullptr),
+      comboBoxDraws(nullptr), curFile(QString()), mode(Draw::Calculation), currentDrawIndex(0), currentToolBoxIndex(0),
+      drawMode(true), recentFileActs{0,0,0,0,0}, separatorAct(nullptr), autoSaveTimer(nullptr)
 {
     CreateActions();
     CreateMenus();
@@ -650,7 +650,7 @@ void MainWindow::mouseMove(const QPointF &scenePos)
 void MainWindow::CancelTool()
 {
     delete dialogTool;
-    dialogTool = 0;
+    dialogTool = nullptr;
     switch ( tool )
     {
         case Tool::ArrowTool:
@@ -1031,7 +1031,7 @@ void MainWindow::ClosedActionTable()
 {
     ui->actionTable->setChecked(false);
     delete dialogTable;
-    dialogTable = 0;
+    dialogTable = nullptr;
 }
 
 void MainWindow::ActionHistory(bool checked)
@@ -1336,7 +1336,7 @@ void MainWindow::InitAutoSave()
 {
     //Autosaving file each 5 minutes
     delete autoSaveTimer;
-    autoSaveTimer = 0;
+    autoSaveTimer = nullptr;
 
     QSettings settings(QSettings::IniFormat, QSettings::UserScope, QApplication::organizationName(),
                        QApplication::applicationName());
diff --git a/src/mainwindow.h b/src/mainwindow.h
index 0421cf7df..9cc622812 100644
--- a/src/mainwindow.h
+++ b/src/mainwindow.h
@@ -55,7 +55,7 @@ public:
                * @brief MainWindow constructor.
                * @param parent parent widget.
                */
-              explicit MainWindow(QWidget *parent = 0);
+              explicit MainWindow(QWidget *parent = nullptr);
                        ~MainWindow();
     /**
      * @brief LoadPattern open pattern file.
diff --git a/src/tablewindow.cpp b/src/tablewindow.cpp
index 755050913..c4d489b34 100644
--- a/src/tablewindow.cpp
+++ b/src/tablewindow.cpp
@@ -34,9 +34,9 @@
 #include "options.h"
 
 TableWindow::TableWindow(QWidget *parent)
-    :QMainWindow(parent), numberDetal(0), colission(0), ui(new Ui::TableWindow),
-    listDetails(QVector<VItem*>()), outItems(false), collidingItems(false), tableScene(0),
-    paper(0), shadowPaper(0), listOutItems(0), listCollidingItems(QList<QGraphicsItem*>()),
+    :QMainWindow(parent), numberDetal(nullptr), colission(nullptr), ui(new Ui::TableWindow),
+    listDetails(QVector<VItem*>()), outItems(false), collidingItems(false), tableScene(nullptr),
+    paper(nullptr), shadowPaper(nullptr), listOutItems(nullptr), listCollidingItems(QList<QGraphicsItem*>()),
     indexDetail(0), sceneRect(QRectF()), fileName(QString()), description(QString())
 {
     ui->setupUi(this);
diff --git a/src/tablewindow.h b/src/tablewindow.h
index 00e6a6a0c..026bda81d 100644
--- a/src/tablewindow.h
+++ b/src/tablewindow.h
@@ -57,7 +57,7 @@ public:
      * @brief TableWindow constructor.
      * @param parent parent widget.
      */
-                 explicit TableWindow(QWidget *parent = 0);
+                 explicit TableWindow(QWidget *parent = nullptr);
     ~TableWindow();
 public slots:
     /**
diff --git a/src/tools/drawTools/vdrawtool.cpp b/src/tools/drawTools/vdrawtool.cpp
index c2afef8d2..69e864c3b 100644
--- a/src/tools/drawTools/vdrawtool.cpp
+++ b/src/tools/drawTools/vdrawtool.cpp
@@ -32,7 +32,7 @@ qreal VDrawTool::factor = 1;
 
 VDrawTool::VDrawTool(VPattern *doc, VContainer *data, quint32 id)
     :VAbstractTool(doc, data, id), ignoreContextMenuEvent(false), ignoreFullUpdate(false),
-      nameActivDraw(doc->GetNameActivDraw()), dialog(0)
+      nameActivDraw(doc->GetNameActivDraw()), dialog(nullptr)
 {
     connect(this->doc, &VPattern::ChangedActivDraw, this, &VDrawTool::ChangedActivDraw);
     connect(this->doc, &VPattern::ChangedNameDraw, this, &VDrawTool::ChangedNameDraw);
@@ -85,7 +85,7 @@ void VDrawTool::FullUpdateFromGui(int result)
         }
     }
     delete dialog;
-    dialog = 0;
+    dialog = nullptr;
 }
 
 void VDrawTool::SetFactor(qreal factor)
diff --git a/src/tools/drawTools/vdrawtool.h b/src/tools/drawTools/vdrawtool.h
index ff41eca7c..73c440a52 100644
--- a/src/tools/drawTools/vdrawtool.h
+++ b/src/tools/drawTools/vdrawtool.h
@@ -134,7 +134,7 @@ protected:
         {
             QMenu menu;
             QAction *actionOption = menu.addAction(tr("Options"));
-            QAction *actionRemove = 0;
+            QAction *actionRemove = nullptr;
             if (showRemove)
             {
                 actionRemove = menu.addAction(tr("Delete"));
diff --git a/src/tools/drawTools/vtoolalongline.h b/src/tools/drawTools/vtoolalongline.h
index 0a3248eba..e254004c7 100644
--- a/src/tools/drawTools/vtoolalongline.h
+++ b/src/tools/drawTools/vtoolalongline.h
@@ -52,7 +52,7 @@ public:
                   */
                  VToolAlongLine(VPattern *doc, VContainer *data, quint32 id, const QString &formula,
                                 const quint32 &firstPointId, const quint32 &secondPointId, const QString &typeLine,
-                                const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                                const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolarc.h b/src/tools/drawTools/vtoolarc.h
index 64452b7ca..65dd734b7 100644
--- a/src/tools/drawTools/vtoolarc.h
+++ b/src/tools/drawTools/vtoolarc.h
@@ -49,7 +49,7 @@ public:
                   * @param parent parent object
                   */
                  VToolArc(VPattern *doc, VContainer *data, quint32 id, const Tool::Sources &typeCreation,
-                          QGraphicsItem * parent = 0);
+                          QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolbisector.h b/src/tools/drawTools/vtoolbisector.h
index 86ee1adeb..02ba4e90d 100644
--- a/src/tools/drawTools/vtoolbisector.h
+++ b/src/tools/drawTools/vtoolbisector.h
@@ -53,7 +53,7 @@ public:
                    VToolBisector(VPattern *doc, VContainer *data, const quint32 &id, const QString &typeLine,
                                  const QString &formula, const quint32 &firstPointId, const quint32 &secondPointId,
                                  const quint32 &thirdPointId, const Tool::Sources &typeCreation,
-                                 QGraphicsItem * parent = 0);
+                                 QGraphicsItem * parent = nullptr);
     /**
      * @brief FindPoint find bisector point.
      * @param firstPoint first point of angle.
diff --git a/src/tools/drawTools/vtoolcutarc.h b/src/tools/drawTools/vtoolcutarc.h
index d6f8d3478..4e845f170 100644
--- a/src/tools/drawTools/vtoolcutarc.h
+++ b/src/tools/drawTools/vtoolcutarc.h
@@ -53,7 +53,7 @@ public:
      */
     VToolCutArc(VPattern *doc, VContainer *data, const quint32 &id, const QString &formula,
                 const quint32 &arcId, const quint32 &arc1id, const quint32 &arc2id,
-                const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolcutspline.cpp b/src/tools/drawTools/vtoolcutspline.cpp
index 162080406..25c4d850a 100644
--- a/src/tools/drawTools/vtoolcutspline.cpp
+++ b/src/tools/drawTools/vtoolcutspline.cpp
@@ -108,7 +108,7 @@ void VToolCutSpline::Create(const quint32 _id, const QString &pointName,
         if (typeCreation == Tool::FromGui)
         {
             VPointF *p = new VPointF(point.x(), point.y(), pointName, mx, my);
-            Q_CHECK_PTR(p != 0);
+            Q_CHECK_PTR(p);
             id = data->AddGObject(p);
 
             VSpline *spline1 = new VSpline(spl->GetP1(), spl1p2, spl1p3, *p, spl->GetKcurve());
diff --git a/src/tools/drawTools/vtoolcutspline.h b/src/tools/drawTools/vtoolcutspline.h
index 87405ee45..6baf52e85 100644
--- a/src/tools/drawTools/vtoolcutspline.h
+++ b/src/tools/drawTools/vtoolcutspline.h
@@ -51,7 +51,7 @@ public:
      */
     VToolCutSpline(VPattern *doc, VContainer *data, const quint32 &id, const QString &formula,
                    const quint32 &splineId, const quint32 &spl1id, const quint32 &spl2id,
-                   const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                   const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolcutsplinepath.h b/src/tools/drawTools/vtoolcutsplinepath.h
index 0a7f40b43..2f9707bef 100644
--- a/src/tools/drawTools/vtoolcutsplinepath.h
+++ b/src/tools/drawTools/vtoolcutsplinepath.h
@@ -54,7 +54,7 @@ public:
      */
     VToolCutSplinePath(VPattern *doc, VContainer *data, const quint32 &id, const QString &formula,
                        const quint32 &splinePathId, const quint32 &splPath1id, const quint32 &splPath2id,
-                       const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                       const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolendline.h b/src/tools/drawTools/vtoolendline.h
index b85715035..98eebac48 100644
--- a/src/tools/drawTools/vtoolendline.h
+++ b/src/tools/drawTools/vtoolendline.h
@@ -52,7 +52,7 @@ public:
                   */
                  VToolEndLine(VPattern *doc, VContainer *data, const quint32 &id, const QString &typeLine,
                               const QString &formula, const qreal &angle, const quint32 &basePointId,
-                              const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                              const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolheight.h b/src/tools/drawTools/vtoolheight.h
index 1c0f222ba..5adb588b1 100644
--- a/src/tools/drawTools/vtoolheight.h
+++ b/src/tools/drawTools/vtoolheight.h
@@ -52,7 +52,7 @@ public:
                     */
                    VToolHeight(VPattern *doc, VContainer *data, const quint32 &id, const QString &typeLine,
                                const quint32 &basePointId, const quint32 &p1LineId, const quint32 &p2LineId,
-                               const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                               const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolline.h b/src/tools/drawTools/vtoolline.h
index 7bf8d8367..056b88a0b 100644
--- a/src/tools/drawTools/vtoolline.h
+++ b/src/tools/drawTools/vtoolline.h
@@ -53,7 +53,7 @@ public:
                   */
                  VToolLine(VPattern *doc, VContainer *data, quint32 id, quint32 firstPoint,
                            quint32 secondPoint, const QString &typeLine, const Tool::Sources &typeCreation,
-                           QGraphicsItem * parent = 0);
+                           QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoollineintersect.h b/src/tools/drawTools/vtoollineintersect.h
index e0101aa71..00fb946f8 100644
--- a/src/tools/drawTools/vtoollineintersect.h
+++ b/src/tools/drawTools/vtoollineintersect.h
@@ -52,7 +52,7 @@ public:
                   */
                  VToolLineIntersect(VPattern *doc, VContainer *data, const quint32 &id, const quint32 &p1Line1,
                                     const quint32 &p2Line1, const quint32 &p1Line2, const quint32 &p2Line2,
-                                    const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                                    const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoollinepoint.cpp b/src/tools/drawTools/vtoollinepoint.cpp
index 9d72fe009..d8b739890 100644
--- a/src/tools/drawTools/vtoollinepoint.cpp
+++ b/src/tools/drawTools/vtoollinepoint.cpp
@@ -32,7 +32,7 @@ VToolLinePoint::VToolLinePoint(VPattern *doc, VContainer *data, const quint32 &i
                                const QString &typeLine, const QString &formula, const quint32 &basePointId,
                                const qreal &angle, QGraphicsItem *parent)
     :VToolPoint(doc, data, id, parent),  formula(formula), angle(angle), basePointId(basePointId),
-      mainLine(0)
+      mainLine(nullptr)
 {
     this->typeLine = typeLine;
     Q_ASSERT_X(basePointId > 0, Q_FUNC_INFO, "basePointId <= 0");
diff --git a/src/tools/drawTools/vtoollinepoint.h b/src/tools/drawTools/vtoollinepoint.h
index 9f367a985..52628620a 100644
--- a/src/tools/drawTools/vtoollinepoint.h
+++ b/src/tools/drawTools/vtoollinepoint.h
@@ -51,7 +51,7 @@ public:
                        */
                       VToolLinePoint(VPattern *doc, VContainer *data, const quint32 &id, const QString &typeLine,
                                      const QString &formula, const quint32 &basePointId, const qreal &angle,
-                                     QGraphicsItem * parent = 0);
+                                     QGraphicsItem * parent = nullptr);
 public slots:
     /**
      * @brief ChangedActivDraw disable or enable context menu after change active pattern peace.
diff --git a/src/tools/drawTools/vtoolnormal.h b/src/tools/drawTools/vtoolnormal.h
index 8efeea75b..dc6241e68 100644
--- a/src/tools/drawTools/vtoolnormal.h
+++ b/src/tools/drawTools/vtoolnormal.h
@@ -54,7 +54,7 @@ public:
                    VToolNormal(VPattern *doc, VContainer *data, const quint32 &id, const QString &typeLine,
                                const QString &formula, const qreal &angle, const quint32 &firstPointId,
                                const quint32 &secondPointId, const Tool::Sources &typeCreation,
-                               QGraphicsItem * parent = 0);
+                               QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolpoint.h b/src/tools/drawTools/vtoolpoint.h
index 1a5f0223c..4622d6bc9 100644
--- a/src/tools/drawTools/vtoolpoint.h
+++ b/src/tools/drawTools/vtoolpoint.h
@@ -46,7 +46,7 @@ public:
                              * @param id object id in container.
                              * @param parent parent object.
                              */
-                            VToolPoint(VPattern *doc, VContainer *data, quint32 id, QGraphicsItem * parent = 0);
+                            VToolPoint(VPattern *doc, VContainer *data, quint32 id, QGraphicsItem * parent = nullptr);
     virtual                 ~VToolPoint(){}
     static const QString    TagName;
 public slots:
diff --git a/src/tools/drawTools/vtoolpointofcontact.h b/src/tools/drawTools/vtoolpointofcontact.h
index 45e28d64a..76d0d90b7 100644
--- a/src/tools/drawTools/vtoolpointofcontact.h
+++ b/src/tools/drawTools/vtoolpointofcontact.h
@@ -52,7 +52,7 @@ public:
                    VToolPointOfContact(VPattern *doc, VContainer *data, const quint32 &id,
                                        const QString &arcRadius, const quint32 &center,
                                        const quint32 &firstPointId, const quint32 &secondPointId,
-                                       const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                                       const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolpointofintersection.h b/src/tools/drawTools/vtoolpointofintersection.h
index 8d26f069e..d6df58072 100644
--- a/src/tools/drawTools/vtoolpointofintersection.h
+++ b/src/tools/drawTools/vtoolpointofintersection.h
@@ -50,7 +50,7 @@ public:
                   */
                  VToolPointOfIntersection(VPattern *doc, VContainer *data, const quint32 &id,
                                           const quint32 &firstPointId, const quint32 &secondPointId,
-                                          const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                                          const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolshoulderpoint.h b/src/tools/drawTools/vtoolshoulderpoint.h
index e7414f8f3..2de3803be 100644
--- a/src/tools/drawTools/vtoolshoulderpoint.h
+++ b/src/tools/drawTools/vtoolshoulderpoint.h
@@ -54,7 +54,7 @@ public:
                    VToolShoulderPoint(VPattern *doc, VContainer *data, const quint32 &id, const QString &typeLine,
                                       const QString &formula, const quint32 &p1Line, const quint32 &p2Line,
                                       const quint32 &pShoulder, const Tool::Sources &typeCreation,
-                                      QGraphicsItem * parent = 0);
+                                      QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolsinglepoint.h b/src/tools/drawTools/vtoolsinglepoint.h
index c09751f46..c869e81f6 100644
--- a/src/tools/drawTools/vtoolsinglepoint.h
+++ b/src/tools/drawTools/vtoolsinglepoint.h
@@ -48,7 +48,7 @@ public:
                   * @param parent parent object.
                   */
                  VToolSinglePoint (VPattern *doc, VContainer *data, quint32 id, const Tool::Sources &typeCreation,
-                                   QGraphicsItem * parent = 0 );
+                                   QGraphicsItem * parent = nullptr );
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolspline.h b/src/tools/drawTools/vtoolspline.h
index 5b40d582f..dd675d78c 100644
--- a/src/tools/drawTools/vtoolspline.h
+++ b/src/tools/drawTools/vtoolspline.h
@@ -50,7 +50,7 @@ public:
                   * @param parent parent object.
                   */
                  VToolSpline (VPattern *doc, VContainer *data, quint32 id, const Tool::Sources &typeCreation,
-                              QGraphicsItem * parent = 0 );
+                              QGraphicsItem * parent = nullptr );
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/drawTools/vtoolsplinepath.h b/src/tools/drawTools/vtoolsplinepath.h
index 4374934e1..286585b00 100644
--- a/src/tools/drawTools/vtoolsplinepath.h
+++ b/src/tools/drawTools/vtoolsplinepath.h
@@ -49,7 +49,7 @@ public:
                    * @param parent parent object.
                    */
                   VToolSplinePath(VPattern *doc, VContainer *data, quint32 id, const Tool::Sources &typeCreation,
-                                  QGraphicsItem * parent = 0);
+                                  QGraphicsItem * parent = nullptr);
      /**
       * @brief setDialog set dialog when user want change tool option.
       */
diff --git a/src/tools/drawTools/vtooltriangle.h b/src/tools/drawTools/vtooltriangle.h
index 03913eed0..ffdb63e30 100644
--- a/src/tools/drawTools/vtooltriangle.h
+++ b/src/tools/drawTools/vtooltriangle.h
@@ -52,7 +52,7 @@ public:
                     */
                    VToolTriangle(VPattern *doc, VContainer *data, const quint32 &id, const quint32 &axisP1Id,
                                  const quint32 &axisP2Id, const quint32 &firstPointId, const quint32 &secondPointId,
-                                 const Tool::Sources &typeCreation, QGraphicsItem * parent = 0);
+                                 const Tool::Sources &typeCreation, QGraphicsItem * parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/tools/nodeDetails/vabstractnode.h b/src/tools/nodeDetails/vabstractnode.h
index 8fc0ced14..b91bde905 100644
--- a/src/tools/nodeDetails/vabstractnode.h
+++ b/src/tools/nodeDetails/vabstractnode.h
@@ -47,7 +47,7 @@ public:
                   * @param parent parent object.
                   */
                  VAbstractNode(VPattern *doc, VContainer *data, const quint32 &id, const quint32 &idNode,
-                               const quint32 &idTool, QObject *parent = 0);
+                               const quint32 &idTool, QObject *parent = nullptr);
     virtual      ~VAbstractNode() {}
     static const QString AttrIdObject;
     static const QString AttrIdTool;
diff --git a/src/tools/nodeDetails/vnodearc.h b/src/tools/nodeDetails/vnodearc.h
index 34ff14e4c..2564b429b 100644
--- a/src/tools/nodeDetails/vnodearc.h
+++ b/src/tools/nodeDetails/vnodearc.h
@@ -48,9 +48,8 @@ public:
                   * @param typeCreation way we create this tool.
                   * @param parent parent object.
                   */
-                 VNodeArc(VPattern *doc, VContainer *data, quint32 id, quint32 idArc,
-                          const Tool::Sources &typeCreation, const quint32 &idTool = 0, QObject *qoParent = 0,
-                          QGraphicsItem * parent = 0);
+                 VNodeArc(VPattern *doc, VContainer *data, quint32 id, quint32 idArc, const Tool::Sources &typeCreation,
+                          const quint32 &idTool = 0, QObject *qoParent = nullptr, QGraphicsItem * parent = nullptr);
     /**
      * @brief Create help create tool.
      * @param doc dom document container.
@@ -61,7 +60,7 @@ public:
      * @param typeCreation way we create this tool.
      */
     static void  Create(VPattern *doc, VContainer *data, quint32 id, quint32 idArc, const Document::Documents &parse,
-                        const Tool::Sources &typeCreation, const quint32 &idTool = 0, QObject *parent = 0);
+                        const Tool::Sources &typeCreation, const quint32 &idTool = 0, QObject *parent = nullptr);
     static const QString TagName;
     static const QString ToolType;
     /**
diff --git a/src/tools/nodeDetails/vnodepoint.cpp b/src/tools/nodeDetails/vnodepoint.cpp
index 4a10d8508..5bbcb6b74 100644
--- a/src/tools/nodeDetails/vnodepoint.cpp
+++ b/src/tools/nodeDetails/vnodepoint.cpp
@@ -37,7 +37,7 @@ VNodePoint::VNodePoint(VPattern *doc, VContainer *data, quint32 id, quint32 idPo
                        const Tool::Sources &typeCreation, const quint32 &idTool, QObject *qoParent,
                        QGraphicsItem *parent)
     :VAbstractNode(doc, data, id, idPoint, idTool, qoParent), QGraphicsEllipseItem(parent), radius(toPixel(1.5)),
-      namePoint(0), lineName(0)
+      namePoint(nullptr), lineName(nullptr)
 {
     namePoint = new VGraphicsSimpleTextItem(this);
     lineName = new QGraphicsLineItem(this);
diff --git a/src/tools/nodeDetails/vnodepoint.h b/src/tools/nodeDetails/vnodepoint.h
index cea90ffd3..951d4e0af 100644
--- a/src/tools/nodeDetails/vnodepoint.h
+++ b/src/tools/nodeDetails/vnodepoint.h
@@ -49,8 +49,8 @@ public:
                   * @param parent parent object.
                   */
                  VNodePoint(VPattern *doc, VContainer *data, quint32 id, quint32 idPoint,
-                            const Tool::Sources &typeCreation, const quint32 &idTool = 0, QObject *qoParent = 0,
-                            QGraphicsItem * parent = 0 );
+                            const Tool::Sources &typeCreation, const quint32 &idTool = 0, QObject *qoParent = nullptr,
+                            QGraphicsItem * parent = nullptr );
     /**
      * @brief Create help create tool.
      * @param doc dom document container.
@@ -62,7 +62,7 @@ public:
      */
     static void  Create(VPattern *doc, VContainer *data, quint32 id, quint32 idPoint,
                         const Document::Documents &parse, const Tool::Sources &typeCreation, const quint32 &idTool = 0,
-                        QObject *parent = 0);
+                        QObject *parent = nullptr);
     static const QString TagName;
     static const QString ToolType;
     /**
diff --git a/src/tools/nodeDetails/vnodespline.cpp b/src/tools/nodeDetails/vnodespline.cpp
index 13c04cf02..8b68df85e 100644
--- a/src/tools/nodeDetails/vnodespline.cpp
+++ b/src/tools/nodeDetails/vnodespline.cpp
@@ -56,7 +56,7 @@ VNodeSpline *VNodeSpline::Create(VPattern *doc, VContainer *data, quint32 id, qu
                                  const quint32 &idTool, QObject *parent)
 {
     VAbstractTool::AddRecord(id, Tool::NodeSpline, doc);
-    VNodeSpline *spl = 0;
+    VNodeSpline *spl = nullptr;
     if (parse == Document::FullParse)
     {
         spl = new VNodeSpline(doc, data, id, idSpline, typeCreation, idTool, parent);
diff --git a/src/tools/nodeDetails/vnodespline.h b/src/tools/nodeDetails/vnodespline.h
index a7b1b1729..1384ea97e 100644
--- a/src/tools/nodeDetails/vnodespline.h
+++ b/src/tools/nodeDetails/vnodespline.h
@@ -49,8 +49,8 @@ public:
                    * @param parent parent object.
                    */
                   VNodeSpline(VPattern *doc, VContainer *data, quint32 id, quint32 idSpline,
-                              const Tool::Sources &typeCreation, const quint32 &idTool = 0, QObject *qoParent = 0,
-                              QGraphicsItem * parent = 0);
+                              const Tool::Sources &typeCreation, const quint32 &idTool = 0, QObject *qoParent = nullptr,
+                              QGraphicsItem * parent = nullptr);
     /**
      * @brief Create help create tool.
      * @param doc dom document container.
@@ -63,7 +63,7 @@ public:
      */
     static VNodeSpline *Create(VPattern *doc, VContainer *data, quint32 id, quint32 idSpline,
                                const Document::Documents &parse, const Tool::Sources &typeCreation,
-                               const quint32 &idTool = 0, QObject *parent = 0);
+                               const quint32 &idTool = 0, QObject *parent = nullptr);
     static const QString TagName;
     static const QString ToolType;
     /**
diff --git a/src/tools/nodeDetails/vnodesplinepath.h b/src/tools/nodeDetails/vnodesplinepath.h
index 248773d6f..3d96c306a 100644
--- a/src/tools/nodeDetails/vnodesplinepath.h
+++ b/src/tools/nodeDetails/vnodesplinepath.h
@@ -49,8 +49,8 @@ public:
                   * @param parent parent object.
                   */
                  VNodeSplinePath(VPattern *doc, VContainer *data, quint32 id, quint32 idSpline,
-                                 const Tool::Sources &typeCreation, const quint32 &idTool = 0, QObject *qoParent = 0,
-                                 QGraphicsItem * parent = 0);
+                                 const Tool::Sources &typeCreation, const quint32 &idTool = 0,
+                                 QObject *qoParent = nullptr, QGraphicsItem * parent = nullptr);
     /**
      * @brief Create help create tool.
      * @param doc dom document container.
diff --git a/src/tools/vabstracttool.h b/src/tools/vabstracttool.h
index 0b2351d4c..48b613971 100644
--- a/src/tools/vabstracttool.h
+++ b/src/tools/vabstracttool.h
@@ -47,7 +47,7 @@ public:
      * @param id object id in container.
      * @param parent parent object.
      */
-    VAbstractTool(VPattern *doc, VContainer *data, quint32 id, QObject *parent = 0);
+    VAbstractTool(VPattern *doc, VContainer *data, quint32 id, QObject *parent = nullptr);
     virtual ~VAbstractTool(){}
     /**
      * @brief NewSceneRect calculate scene rect what contains all items and doesn't less that size of scene view.
diff --git a/src/tools/vdatatool.h b/src/tools/vdatatool.h
index d2b941393..69ef0a00f 100644
--- a/src/tools/vdatatool.h
+++ b/src/tools/vdatatool.h
@@ -44,7 +44,7 @@ public:
      * @param data container with variables
      * @param parent parent object
      */
-    VDataTool(VContainer *data, QObject *parent = 0);
+    VDataTool(VContainer *data, QObject *parent = nullptr);
     virtual ~VDataTool(){}
     /**
      * @brief operator = assignment operator.
diff --git a/src/tools/vtooldetail.cpp b/src/tools/vtooldetail.cpp
index 3beb3072f..5ad9740b4 100644
--- a/src/tools/vtooldetail.cpp
+++ b/src/tools/vtooldetail.cpp
@@ -49,7 +49,7 @@ const QString VToolDetail::NodeSplinePath = QStringLiteral("NodeSplinePath");
 
 VToolDetail::VToolDetail(VPattern *doc, VContainer *data, const quint32 &id, const Tool::Sources &typeCreation,
                          VMainGraphicsScene *scene, QGraphicsItem *parent)
-    :VAbstractTool(doc, data, id), QGraphicsPathItem(parent), dialog(0), sceneDetails(scene)
+    :VAbstractTool(doc, data, id), QGraphicsPathItem(parent), dialog(nullptr), sceneDetails(scene)
 {
     VDetail detail = data->GetDetail(id);
     for (ptrdiff_t i = 0; i< detail.CountNode(); ++i)
diff --git a/src/tools/vtooldetail.h b/src/tools/vtooldetail.h
index aaf11337c..c15d4da54 100644
--- a/src/tools/vtooldetail.h
+++ b/src/tools/vtooldetail.h
@@ -50,7 +50,7 @@ public:
      * @param parent parent object
      */
     VToolDetail(VPattern *doc, VContainer *data, const quint32 &id, const Tool::Sources &typeCreation,
-                VMainGraphicsScene *scene, QGraphicsItem * parent = 0);
+                VMainGraphicsScene *scene, QGraphicsItem * parent = nullptr);
     ~VToolDetail();
     /**
      * @brief setDialog set dialog when user want change tool option.
diff --git a/src/tools/vtooluniondetails.h b/src/tools/vtooluniondetails.h
index aae979e7b..32505d861 100644
--- a/src/tools/vtooluniondetails.h
+++ b/src/tools/vtooluniondetails.h
@@ -53,7 +53,7 @@ public:
      */
     VToolUnionDetails(VPattern *doc, VContainer *data, const quint32 &id, const VDetail &d1, const VDetail &d2,
                       const quint32 &indexD1, const quint32 &indexD2, const Tool::Sources &typeCreation,
-                      QObject *parent = 0);
+                      QObject *parent = nullptr);
     /**
      * @brief setDialog set dialog when user want change tool option.
      */
diff --git a/src/widgets/doubledelegate.h b/src/widgets/doubledelegate.h
index fde48b36b..f515b14cb 100644
--- a/src/widgets/doubledelegate.h
+++ b/src/widgets/doubledelegate.h
@@ -43,7 +43,7 @@ public:
              * @brief DoubleSpinBoxDelegate constructor.
              * @param parent parent object.
              */
-    DoubleSpinBoxDelegate(QObject *parent = 0): QItemDelegate(parent), lastValue(-10001.0){}
+    DoubleSpinBoxDelegate(QObject *parent = nullptr): QItemDelegate(parent), lastValue(-10001.0){}
     /**
      * @brief createEditorReturns the widget used to edit the item specified by index for editing. The parent widget and
      * style option are used to control how the editor widget appears.
diff --git a/src/widgets/textdelegate.h b/src/widgets/textdelegate.h
index 5bdac8a6e..442ca1a3d 100644
--- a/src/widgets/textdelegate.h
+++ b/src/widgets/textdelegate.h
@@ -43,7 +43,7 @@ public:
      * @brief TextDelegate constructor.
      * @param parent parent widget.
      */
-    explicit TextDelegate(QObject *parent = 0);
+    explicit TextDelegate(QObject *parent = nullptr);
     /**
      * @brief createEditorReturns the widget used to edit the item specified by index for editing. The parent widget and
      * style option are used to control how the editor widget appears.
diff --git a/src/widgets/vcontrolpointspline.cpp b/src/widgets/vcontrolpointspline.cpp
index bf1dc0be8..c8ba29692 100644
--- a/src/widgets/vcontrolpointspline.cpp
+++ b/src/widgets/vcontrolpointspline.cpp
@@ -34,7 +34,8 @@
 VControlPointSpline::VControlPointSpline(const qint32 &indexSpline, SplinePoint::Position position,
                                          const QPointF &controlPoint, const QPointF &splinePoint,
                                          QGraphicsItem *parent)
-    :QGraphicsEllipseItem(parent), radius(toPixel(1.5)), controlLine(0), indexSpline(indexSpline), position(position)
+    :QGraphicsEllipseItem(parent), radius(toPixel(1.5)), controlLine(nullptr), indexSpline(indexSpline),
+      position(position)
 {
     //create circle
     QRectF rec = QRectF(0, 0, radius*2, radius*2);
diff --git a/src/widgets/vcontrolpointspline.h b/src/widgets/vcontrolpointspline.h
index 60e8b5b54..550420bfb 100644
--- a/src/widgets/vcontrolpointspline.h
+++ b/src/widgets/vcontrolpointspline.h
@@ -50,7 +50,7 @@ public:
                        */
                       VControlPointSpline(const qint32 &indexSpline, SplinePoint::Position position,
                                           const QPointF &controlPoint, const QPointF &splinePoint,
-                                          QGraphicsItem * parent = 0);
+                                          QGraphicsItem * parent = nullptr);
 signals:
     /**
      * @brief ControlPointChangePosition emit when control point change position.
diff --git a/src/widgets/vgraphicssimpletextitem.h b/src/widgets/vgraphicssimpletextitem.h
index f21454f4d..4c6967a60 100644
--- a/src/widgets/vgraphicssimpletextitem.h
+++ b/src/widgets/vgraphicssimpletextitem.h
@@ -42,13 +42,13 @@ public:
                   * @brief VGraphicsSimpleTextItem default constructor.
                   * @param parent parent object.
                   */
-                 VGraphicsSimpleTextItem(QGraphicsItem * parent = 0);
+                 VGraphicsSimpleTextItem(QGraphicsItem * parent = nullptr);
                  /**
                   * @brief VGraphicsSimpleTextItem constructor.
                   * @param text text.
                   * @param parent parent object.
                   */
-                 VGraphicsSimpleTextItem( const QString & text, QGraphicsItem * parent = 0 );
+                 VGraphicsSimpleTextItem( const QString & text, QGraphicsItem * parent = nullptr );
     /**
      * @brief FontSize return label font size.
      * @return font size.
diff --git a/src/widgets/vitem.cpp b/src/widgets/vitem.cpp
index 8d548a648..bbbf2d11e 100644
--- a/src/widgets/vitem.cpp
+++ b/src/widgets/vitem.cpp
@@ -33,17 +33,17 @@
 #include <QDebug>
 
 VItem::VItem (const QPainterPath & path, int numInList, QGraphicsItem * parent )
-    :QGraphicsPathItem ( path, parent ), numInOutList(numInList), paper(0)
+    :QGraphicsPathItem ( path, parent ), numInOutList(numInList), paper(nullptr)
 {
 }
 
-VItem::VItem():numInOutList(0), paper(0)
+VItem::VItem():numInOutList(0), paper(nullptr)
 {
 
 }
 
 VItem::VItem(int numInList, QGraphicsItem *parent):QGraphicsPathItem (parent), numInOutList(numInList),
-    paper(0)
+    paper(nullptr)
 {
 
 }
@@ -51,7 +51,7 @@ VItem::VItem(int numInList, QGraphicsItem *parent):QGraphicsPathItem (parent), n
 void VItem::checkItemChange()
 {
     QRectF rect;
-    if (paper == 0)
+    if (paper == nullptr)
     {
         qDebug()<<"Don't set paper for detail!!!!";
         rect = this->scene()->sceneRect();
diff --git a/src/widgets/vitem.h b/src/widgets/vitem.h
index 0b8523045..4822e0f4b 100644
--- a/src/widgets/vitem.h
+++ b/src/widgets/vitem.h
@@ -48,14 +48,14 @@ public:
      * @param numInList index in list of details.
      * @param parent parent object.
      */
-                VItem (int numInList, QGraphicsItem * parent = 0);
+                VItem (int numInList, QGraphicsItem * parent = nullptr);
     /**
      * @brief VItem constructor.
      * @param path detail path.
      * @param numInList index in list of details.
      * @param parent parent object.
      */
-                VItem ( const QPainterPath & path, int numInList, QGraphicsItem * parent = 0 );
+                VItem ( const QPainterPath & path, int numInList, QGraphicsItem * parent = nullptr );
     /**
      * @brief Rotate rotate detail on angle in degree.
      * @param angle angle in degree.
diff --git a/src/widgets/vmaingraphicsscene.h b/src/widgets/vmaingraphicsscene.h
index a25b4a74f..3b3f6afa4 100644
--- a/src/widgets/vmaingraphicsscene.h
+++ b/src/widgets/vmaingraphicsscene.h
@@ -48,7 +48,7 @@ public:
                    * @param sceneRect scene rect.
                    * @param parent parent object.
                    */
-                  VMainGraphicsScene(const QRectF & sceneRect, QObject * parent = 0);
+                  VMainGraphicsScene(const QRectF & sceneRect, QObject * parent = nullptr);
     /**
      * @brief getHorScrollBar return scene horizontal scrollbar.
      * @return horizontal scrollbar.
diff --git a/src/widgets/vmaingraphicsview.h b/src/widgets/vmaingraphicsview.h
index 175f35025..55cdfd648 100644
--- a/src/widgets/vmaingraphicsview.h
+++ b/src/widgets/vmaingraphicsview.h
@@ -42,7 +42,7 @@ public:
      * @brief VMainGraphicsView constructor.
      * @param parent parent object.
      */
-    explicit VMainGraphicsView(QWidget *parent = 0);
+    explicit VMainGraphicsView(QWidget *parent = nullptr);
 signals:
     /**
      * @brief NewFactor send new scale factor.
diff --git a/src/widgets/vsimplearc.cpp b/src/widgets/vsimplearc.cpp
index f6cf369eb..91ebef9b9 100644
--- a/src/widgets/vsimplearc.cpp
+++ b/src/widgets/vsimplearc.cpp
@@ -31,7 +31,7 @@
 VSimpleArc::VSimpleArc(quint32 id, Qt::GlobalColor *currentColor, qreal *factor, QObject *parent)
 :QObject(parent), QGraphicsPathItem(), id (id), factor(factor), currentColor(currentColor)
 {
-    if (factor == 0)
+    if (factor == nullptr)
     {
         setPen(QPen(Qt::black, widthHairLine));
     }
@@ -55,7 +55,7 @@ void VSimpleArc::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 void VSimpleArc::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
 {
     Q_UNUSED(event);
-    if (factor == 0)
+    if (factor == nullptr)
     {
         this->setPen(QPen(*currentColor, widthMainLine));
     }
@@ -68,7 +68,7 @@ void VSimpleArc::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
 void VSimpleArc::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
 {
     Q_UNUSED(event);
-    if (factor == 0)
+    if (factor == nullptr)
     {
         this->setPen(QPen(*currentColor, widthHairLine));
     }
diff --git a/src/widgets/vsimplearc.h b/src/widgets/vsimplearc.h
index 32665a254..914e93daf 100644
--- a/src/widgets/vsimplearc.h
+++ b/src/widgets/vsimplearc.h
@@ -55,7 +55,7 @@ public:
      * @param factor scale factor.
      * @param parent parent object.
      */
-    VSimpleArc(quint32 id, Qt::GlobalColor *currentColor, qreal *factor = 0, QObject *parent = 0);
+    VSimpleArc(quint32 id, Qt::GlobalColor *currentColor, qreal *factor = nullptr, QObject *parent = nullptr);
 signals:
     /**
      * @brief Choosed send id when clicked.
diff --git a/src/widgets/vsimplespline.cpp b/src/widgets/vsimplespline.cpp
index 3e5d2d063..320bb37b8 100644
--- a/src/widgets/vsimplespline.cpp
+++ b/src/widgets/vsimplespline.cpp
@@ -32,7 +32,7 @@
 VSimpleSpline::VSimpleSpline(quint32 id, Qt::GlobalColor *currentColor, qreal *factor, QObject *parent)
     :QObject(parent), QGraphicsPathItem(), id (id), factor(factor), currentColor(currentColor)
 {
-    if (factor == 0)
+    if (factor == nullptr)
     {
         setPen(QPen(Qt::black, widthHairLine));
     }
@@ -56,7 +56,7 @@ void VSimpleSpline::mouseReleaseEvent(QGraphicsSceneMouseEvent *event)
 void VSimpleSpline::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
 {
     Q_UNUSED(event);
-    if (factor == 0)
+    if (factor == nullptr)
     {
         this->setPen(QPen(*currentColor, widthMainLine));
     }
@@ -69,7 +69,7 @@ void VSimpleSpline::hoverMoveEvent(QGraphicsSceneHoverEvent *event)
 void VSimpleSpline::hoverLeaveEvent(QGraphicsSceneHoverEvent *event)
 {
     Q_UNUSED(event);
-    if (factor == 0)
+    if (factor == nullptr)
     {
         this->setPen(QPen(*currentColor, widthHairLine));
     }
diff --git a/src/widgets/vsimplespline.h b/src/widgets/vsimplespline.h
index 4853c1cbe..51045182e 100644
--- a/src/widgets/vsimplespline.h
+++ b/src/widgets/vsimplespline.h
@@ -55,7 +55,7 @@ public:
      * @param currentColor current color.
      * @param parent parent object.
      */
-    VSimpleSpline(quint32 id, Qt::GlobalColor *currentColor, qreal *factor = 0, QObject *parent = 0);
+    VSimpleSpline(quint32 id, Qt::GlobalColor *currentColor, qreal *factor = nullptr, QObject *parent = 0);
 signals:
     /**
      * @brief Choosed send id when clicked.
diff --git a/src/widgets/vtablegraphicsview.h b/src/widgets/vtablegraphicsview.h
index 7d7ebd5c9..abd79573a 100644
--- a/src/widgets/vtablegraphicsview.h
+++ b/src/widgets/vtablegraphicsview.h
@@ -43,7 +43,7 @@ public:
      */
     enum typeMove_e { Left, Right, Up, Down };
 
-    VTableGraphicsView(QGraphicsScene* pScene, QWidget *parent = 0);
+    VTableGraphicsView(QGraphicsScene* pScene, QWidget *parent = nullptr);
 signals:
     /**
      * @brief itemChect emit after change selection state detail.
diff --git a/src/xml/vdomdocument.cpp b/src/xml/vdomdocument.cpp
index de4449ec4..e22d956e5 100644
--- a/src/xml/vdomdocument.cpp
+++ b/src/xml/vdomdocument.cpp
@@ -40,7 +40,7 @@
 class MessageHandler : public QAbstractMessageHandler
 {
 public:
-    MessageHandler() : QAbstractMessageHandler(0), m_messageType(QtMsgType()), m_description(QString()),
+    MessageHandler() : QAbstractMessageHandler(), m_messageType(QtMsgType()), m_description(QString()),
         m_sourceLocation(QSourceLocation()){}
     QString statusMessage() const;
     qint64  line() const;
diff --git a/src/xml/vpattern.h b/src/xml/vpattern.h
index 454786598..67298f618 100644
--- a/src/xml/vpattern.h
+++ b/src/xml/vpattern.h
@@ -52,7 +52,7 @@ class VPattern : public QObject, public VDomDocument
 {
     Q_OBJECT
 public:
-    VPattern(VContainer *data, QComboBox *comboBoxDraws, Draw::Draws *mode, QObject *parent = 0);
+    VPattern(VContainer *data, QComboBox *comboBoxDraws, Draw::Draws *mode, QObject *parent = nullptr);
     /**
      * @brief CreateEmptyFile create minimal empty file.
      */