diff --git a/src/app/dialogs/tools/dialogalongline.cpp b/src/app/dialogs/tools/dialogalongline.cpp
index f33b72ab8..d26e3e455 100644
--- a/src/app/dialogs/tools/dialogalongline.cpp
+++ b/src/app/dialogs/tools/dialogalongline.cpp
@@ -43,7 +43,7 @@
  */
 DialogAlongLine::DialogAlongLine(const VContainer *data, const quint32 &toolId, QWidget *parent)
     :DialogTool(data, toolId, parent), ui(new Ui::DialogAlongLine),
-      formula(QString()), formulaBaseHeight(0), line(nullptr)
+      formula(QString()), formulaBaseHeight(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -71,7 +71,7 @@ DialogAlongLine::DialogAlongLine(const VContainer *data, const quint32 &toolId,
     connect(ui->comboBoxSecondPoint, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogAlongLine::PointChanged);
 
-    line = new VisToolAlongLine(data);
+    vis = new VisToolAlongLine(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -115,14 +115,7 @@ void DialogAlongLine::FXLength()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogAlongLine::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisToolAlongLine::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolAlongLine>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -134,10 +127,7 @@ void DialogAlongLine::DeployFormulaTextEdit()
 //---------------------------------------------------------------------------------------------------------------------
 DialogAlongLine::~DialogAlongLine()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolAlongLine>();
     delete ui;
 }
 
@@ -153,6 +143,9 @@ void DialogAlongLine::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolAlongLine *line = qobject_cast<VisToolAlongLine *>(vis);
+            SCASSERT(line != nullptr);
+
             const QString toolTip = tr("Select second point of line");
             switch (number)
             {
@@ -195,6 +188,9 @@ void DialogAlongLine::SaveData()
     formula = ui->plainTextEditFormula->toPlainText();
     formula.replace("\n", " ");
 
+    VisToolAlongLine *line = qobject_cast<VisToolAlongLine *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetFirstPointId());
     line->setPoint2Id(GetSecondPointId());
     line->setLength(formula);
@@ -217,6 +213,9 @@ void DialogAlongLine::closeEvent(QCloseEvent *event)
 void DialogAlongLine::SetSecondPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxSecondPoint, value);
+
+    VisToolAlongLine *line = qobject_cast<VisToolAlongLine *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint2Id(value);
 }
 
@@ -228,6 +227,9 @@ void DialogAlongLine::SetSecondPointId(const quint32 &value)
 void DialogAlongLine::SetFirstPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxFirstPoint, value);
+
+    VisToolAlongLine *line = qobject_cast<VisToolAlongLine *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -245,7 +247,11 @@ void DialogAlongLine::SetFormula(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formula);
+
+    VisToolAlongLine *line = qobject_cast<VisToolAlongLine *>(vis);
+    SCASSERT(line != nullptr);
     line->setLength(formula);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
@@ -257,7 +263,7 @@ void DialogAlongLine::SetFormula(const QString &value)
 void DialogAlongLine::SetTypeLine(const QString &value)
 {
     ChangeCurrentData(ui->comboBoxLineType, value);
-    line->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
+    vis->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogalongline.h b/src/app/dialogs/tools/dialogalongline.h
index 1ba3605f2..ef14c1eda 100644
--- a/src/app/dialogs/tools/dialogalongline.h
+++ b/src/app/dialogs/tools/dialogalongline.h
@@ -31,8 +31,6 @@
 
 #include "dialogtool.h"
 
-class VisToolAlongLine;
-
 namespace Ui
 {
     class DialogAlongLine;
@@ -46,7 +44,7 @@ class DialogAlongLine : public DialogTool
     Q_OBJECT
 public:
     DialogAlongLine(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogAlongLine();
+    virtual ~DialogAlongLine();
 
     void                SetPointName(const QString &value);
 
@@ -95,7 +93,6 @@ private:
 
     /** @brief formulaBaseHeight base height defined by dialogui */
     int formulaBaseHeight;
-    VisToolAlongLine    *line;
 };
 
 #endif // DIALOGALONGLINE_H
diff --git a/src/app/dialogs/tools/dialogarc.cpp b/src/app/dialogs/tools/dialogarc.cpp
index 3105693df..9b88f12fa 100644
--- a/src/app/dialogs/tools/dialogarc.cpp
+++ b/src/app/dialogs/tools/dialogarc.cpp
@@ -47,8 +47,7 @@
 DialogArc::DialogArc(const VContainer *data, const quint32 &toolId, QWidget *parent)
     :DialogTool(data, toolId, parent), ui(new Ui::DialogArc), flagRadius(false), flagF1(false), flagF2(false),
       timerRadius(nullptr), timerF1(nullptr), timerF2(nullptr), radius(QString()), f1(QString()), f2(QString()),
-      formulaBaseHeight(0), formulaBaseHeightF1(0), formulaBaseHeightF2(0), path(nullptr), angleF1(INT_MIN),
-      angleF2(INT_MIN)
+      formulaBaseHeight(0), formulaBaseHeightF1(0), formulaBaseHeightF2(0), angleF1(INT_MIN), angleF2(INT_MIN)
 {
     ui->setupUi(this);
 
@@ -89,7 +88,7 @@ DialogArc::DialogArc(const VContainer *data, const quint32 &toolId, QWidget *par
     connect(ui->pushButtonGrowLengthF1, &QPushButton::clicked, this, &DialogArc::DeployF1TextEdit);
     connect(ui->pushButtonGrowLengthF2, &QPushButton::clicked, this, &DialogArc::DeployF2TextEdit);
 
-    path = new VisToolArc(data);
+    vis = new VisToolArc(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -113,10 +112,7 @@ void DialogArc::DeployF2TextEdit()
 //---------------------------------------------------------------------------------------------------------------------
 DialogArc::~DialogArc()
 {
-    if (qApp->getCurrentScene()->items().contains(path))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete path;
-    }
+    DeleteVisualization<VisToolArc>();
     delete ui;
 }
 
@@ -128,7 +124,7 @@ DialogArc::~DialogArc()
 void DialogArc::SetCenter(const quint32 &value)
 {
     ChangeCurrentData(ui->comboBoxBasePoint, value);
-    path->setPoint1Id(value);
+    vis->setPoint1Id(value);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -145,7 +141,11 @@ void DialogArc::SetF2(const QString &value)
         this->DeployF2TextEdit();
     }
     ui->plainTextEditF2->setPlainText(f2);
+
+    VisToolArc *path = qobject_cast<VisToolArc *>(vis);
+    SCASSERT(path != nullptr);
     path->setF2(f2);
+
     MoveCursorToEnd(ui->plainTextEditF2);
 }
 
@@ -175,7 +175,11 @@ void DialogArc::SetF1(const QString &value)
         this->DeployF1TextEdit();
     }
     ui->plainTextEditF1->setPlainText(f1);
+
+    VisToolArc *path = qobject_cast<VisToolArc *>(vis);
+    SCASSERT(path != nullptr);
     path->setF1(f1);
+
     MoveCursorToEnd(ui->plainTextEditF1);
 }
 
@@ -193,7 +197,11 @@ void DialogArc::SetRadius(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(radius);
+
+    VisToolArc *path = qobject_cast<VisToolArc *>(vis);
+    SCASSERT(path != nullptr);
     path->setRadius(radius);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
@@ -211,7 +219,7 @@ void DialogArc::ChosenObject(quint32 id, const SceneObject &type)
         {
             if (SetObject(id, ui->comboBoxBasePoint, ""))
             {
-                path->VisualMode(id);
+                vis->VisualMode(id);
                 prepare = true;
                 this->setModal(true);
                 this->show();
@@ -223,14 +231,7 @@ void DialogArc::ChosenObject(quint32 id, const SceneObject &type)
 //---------------------------------------------------------------------------------------------------------------------
 void DialogArc::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, path, &Visualization::SetFactor);
-        scene->addItem(path);
-        path->RefreshGeometry();
-    }
+    AddVisualization<VisToolArc>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -243,6 +244,9 @@ void DialogArc::SaveData()
     f2 = ui->plainTextEditF2->toPlainText();
     f2.replace("\n", " ");
 
+    VisToolArc *path = qobject_cast<VisToolArc *>(vis);
+    SCASSERT(path != nullptr);
+
     path->setPoint1Id(GetCenter());
     path->setRadius(radius);
     path->setF1(f1);
diff --git a/src/app/dialogs/tools/dialogarc.h b/src/app/dialogs/tools/dialogarc.h
index d361e1579..ab5d707be 100644
--- a/src/app/dialogs/tools/dialogarc.h
+++ b/src/app/dialogs/tools/dialogarc.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogArc;
 }
 
-class VisToolArc;
-
 /**
  * @brief The DialogArc class dialog for ToolArc. Help create arc and edit option.
  */
@@ -46,7 +44,7 @@ class DialogArc : public DialogTool
     Q_OBJECT
 public:
     DialogArc(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogArc();
+    virtual ~DialogArc();
 
     quint32       GetCenter() const;
     void          SetCenter(const quint32 &value);
@@ -123,8 +121,6 @@ private:
     int           formulaBaseHeightF1;
     int           formulaBaseHeightF2;
 
-    VisToolArc    *path;
-
     qreal         angleF1;
     qreal         angleF2;
 
diff --git a/src/app/dialogs/tools/dialogbisector.cpp b/src/app/dialogs/tools/dialogbisector.cpp
index c43a27d1a..402da2f1b 100644
--- a/src/app/dialogs/tools/dialogbisector.cpp
+++ b/src/app/dialogs/tools/dialogbisector.cpp
@@ -43,8 +43,7 @@
  * @param parent parent widget
  */
 DialogBisector::DialogBisector(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogBisector), formula(QString()), formulaBaseHeight(0),
-      line(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogBisector), formula(QString()), formulaBaseHeight(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -74,7 +73,7 @@ DialogBisector::DialogBisector(const VContainer *data, const quint32 &toolId, QW
     connect(ui->comboBoxThirdPoint, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogBisector::PointNameChanged);
 
-    line = new VisToolBisector(data);
+    vis = new VisToolBisector(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -124,14 +123,7 @@ void DialogBisector::FXLength()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogBisector::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisToolBisector::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolBisector>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -143,10 +135,7 @@ void DialogBisector::DeployFormulaTextEdit()
 //---------------------------------------------------------------------------------------------------------------------
 DialogBisector::~DialogBisector()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolBisector>();
     delete ui;
 }
 
@@ -162,6 +151,9 @@ void DialogBisector::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolBisector *line = qobject_cast<VisToolBisector *>(vis);
+            SCASSERT(line != nullptr);
+
             switch (number)
             {
                 case 0:
@@ -228,7 +220,7 @@ void DialogBisector::SetPointName(const QString &value)
 void DialogBisector::SetTypeLine(const QString &value)
 {
     ChangeCurrentData(ui->comboBoxLineType, value);
-    line->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
+    vis->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -245,7 +237,11 @@ void DialogBisector::SetFormula(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formula);
+
+    VisToolBisector *line = qobject_cast<VisToolBisector *>(vis);
+    SCASSERT(line != nullptr);
     line->setLength(formula);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
@@ -257,6 +253,9 @@ void DialogBisector::SetFormula(const QString &value)
 void DialogBisector::SetFirstPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxFirstPoint, value);
+
+    VisToolBisector *line = qobject_cast<VisToolBisector *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -268,6 +267,9 @@ void DialogBisector::SetFirstPointId(const quint32 &value)
 void DialogBisector::SetSecondPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxSecondPoint, value);
+
+    VisToolBisector *line = qobject_cast<VisToolBisector *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint2Id(value);
 }
 
@@ -279,6 +281,9 @@ void DialogBisector::SetSecondPointId(const quint32 &value)
 void DialogBisector::SetThirdPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxThirdPoint, value);
+
+    VisToolBisector *line = qobject_cast<VisToolBisector *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint3Id(value);
 }
 
@@ -302,6 +307,9 @@ void DialogBisector::SaveData()
     formula = ui->plainTextEditFormula->toPlainText();
     formula.replace("\n", " ");
 
+    VisToolBisector *line = qobject_cast<VisToolBisector *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetFirstPointId());
     line->setPoint2Id(GetSecondPointId());
     line->setPoint3Id(GetThirdPointId());
diff --git a/src/app/dialogs/tools/dialogbisector.h b/src/app/dialogs/tools/dialogbisector.h
index 1ff6df5b3..34f186b9a 100644
--- a/src/app/dialogs/tools/dialogbisector.h
+++ b/src/app/dialogs/tools/dialogbisector.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogBisector;
 }
 
-class VisToolBisector;
-
 /**
  * @brief The DialogBisector class dialog for ToolBisector. Help create point and edit option.
  */
@@ -47,7 +45,7 @@ class DialogBisector : public DialogTool
 public:
 
     DialogBisector(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogBisector();
+    virtual ~DialogBisector();
 
     void               SetPointName(const QString &value);
 
@@ -98,8 +96,6 @@ private:
 
     /** @brief formulaBaseHeight base height defined by dialogui */
     int                formulaBaseHeight;
-    VisToolBisector    *line;
-
 };
 
 #endif // DIALOGBISECTOR_H
diff --git a/src/app/dialogs/tools/dialogcurveintersectaxis.cpp b/src/app/dialogs/tools/dialogcurveintersectaxis.cpp
index 3476be2d2..f1febff37 100644
--- a/src/app/dialogs/tools/dialogcurveintersectaxis.cpp
+++ b/src/app/dialogs/tools/dialogcurveintersectaxis.cpp
@@ -40,8 +40,8 @@
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogCurveIntersectAxis::DialogCurveIntersectAxis(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogCurveIntersectAxis),
-      formulaAngle(QString()), formulaBaseHeightAngle(0), line(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogCurveIntersectAxis), formulaAngle(QString()),
+      formulaBaseHeightAngle(0)
 {
     ui->setupUi(this);
 
@@ -66,16 +66,13 @@ DialogCurveIntersectAxis::DialogCurveIntersectAxis(const VContainer *data, const
     connect(ui->pushButtonGrowLengthAngle, &QPushButton::clicked, this, &DialogCurveIntersectAxis::DeployAngleTextEdit);
     connect(timerFormula, &QTimer::timeout, this, &DialogCurveIntersectAxis::EvalAngle);
 
-    line = new VisToolCurveIntersectAxis(data);
+    vis = new VisToolCurveIntersectAxis(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogCurveIntersectAxis::~DialogCurveIntersectAxis()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolCurveIntersectAxis>();
     delete ui;
 }
 
@@ -96,7 +93,7 @@ QString DialogCurveIntersectAxis::GetTypeLine() const
 void DialogCurveIntersectAxis::SetTypeLine(const QString &value)
 {
     ChangeCurrentData(ui->comboBoxLineType, value);
-    line->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
+    vis->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -116,7 +113,11 @@ void DialogCurveIntersectAxis::SetAngle(const QString &value)
         this->DeployAngleTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formulaAngle);
+
+    VisToolCurveIntersectAxis *line = qobject_cast<VisToolCurveIntersectAxis *>(vis);
+    SCASSERT(line != nullptr);
     line->SetAngle(formulaAngle);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
@@ -130,6 +131,9 @@ quint32 DialogCurveIntersectAxis::GetBasePointId() const
 void DialogCurveIntersectAxis::SetBasePointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxAxisPoint, value);
+
+    VisToolCurveIntersectAxis *line = qobject_cast<VisToolCurveIntersectAxis *>(vis);
+    SCASSERT(line != nullptr);
     line->setAxisPointId(value);
 }
 
@@ -143,6 +147,9 @@ quint32 DialogCurveIntersectAxis::getCurveId() const
 void DialogCurveIntersectAxis::setCurveId(const quint32 &value)
 {
     setCurrentCurveId(ui->comboBoxCurve, value);
+
+    VisToolCurveIntersectAxis *line = qobject_cast<VisToolCurveIntersectAxis *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -179,6 +186,10 @@ void DialogCurveIntersectAxis::ShowDialog(bool click)
             }
         }
         this->setModal(true);
+
+        VisToolCurveIntersectAxis *line = qobject_cast<VisToolCurveIntersectAxis *>(vis);
+        SCASSERT(line != nullptr);
+
         this->SetAngle(line->Angle());//Show in dialog angle what user choose
         emit ToolTip("");
         timerFormula->start();
@@ -191,6 +202,9 @@ void DialogCurveIntersectAxis::ChosenObject(quint32 id, const SceneObject &type)
 {
     if (prepare == false)// After first choose we ignore all objects
     {
+        VisToolCurveIntersectAxis *line = qobject_cast<VisToolCurveIntersectAxis *>(vis);
+        SCASSERT(line != nullptr);
+
         switch (number)
         {
             case (0):
@@ -255,15 +269,7 @@ void DialogCurveIntersectAxis::FXAngle()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogCurveIntersectAxis::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        //TODO move to parent class!
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisToolCurveIntersectAxis::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolCurveIntersectAxis>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -274,6 +280,9 @@ void DialogCurveIntersectAxis::SaveData()
     formulaAngle = ui->plainTextEditFormula->toPlainText();
     formulaAngle.replace("\n", " ");
 
+    VisToolCurveIntersectAxis *line = qobject_cast<VisToolCurveIntersectAxis *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(getCurveId());
     line->setAxisPointId(GetBasePointId());
     line->SetAngle(formulaAngle);
diff --git a/src/app/dialogs/tools/dialogcurveintersectaxis.h b/src/app/dialogs/tools/dialogcurveintersectaxis.h
index 16e0d4246..5ed47fe49 100644
--- a/src/app/dialogs/tools/dialogcurveintersectaxis.h
+++ b/src/app/dialogs/tools/dialogcurveintersectaxis.h
@@ -36,15 +36,13 @@ namespace Ui
     class DialogCurveIntersectAxis;
 }
 
-class VisToolCurveIntersectAxis;
-
 class DialogCurveIntersectAxis : public DialogTool
 {
     Q_OBJECT
 
 public:
     DialogCurveIntersectAxis(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogCurveIntersectAxis();
+    virtual ~DialogCurveIntersectAxis();
 
     void         SetPointName(const QString &value);
 
@@ -83,8 +81,6 @@ private:
 
     QString formulaAngle;
     int     formulaBaseHeightAngle;
-
-    VisToolCurveIntersectAxis *line;
 };
 
 #endif // DIALOGCURVEINTERSECTAXIS_H
diff --git a/src/app/dialogs/tools/dialogcutarc.cpp b/src/app/dialogs/tools/dialogcutarc.cpp
index 7268423e9..3a4a8a279 100644
--- a/src/app/dialogs/tools/dialogcutarc.cpp
+++ b/src/app/dialogs/tools/dialogcutarc.cpp
@@ -43,8 +43,7 @@
  * @param parent parent widget
  */
 DialogCutArc::DialogCutArc(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    : DialogTool(data, toolId, parent), ui(new Ui::DialogCutArc), formula(QString()), formulaBaseHeight(0),
-      path(nullptr)
+    : DialogTool(data, toolId, parent), ui(new Ui::DialogCutArc), formula(QString()), formulaBaseHeight(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -65,7 +64,7 @@ DialogCutArc::DialogCutArc(const VContainer *data, const quint32 &toolId, QWidge
     connect(ui->plainTextEditFormula, &QPlainTextEdit::textChanged, this, &DialogCutArc::FormulaTextChanged);
     connect(ui->pushButtonGrowLength, &QPushButton::clicked, this, &DialogCutArc::DeployFormulaTextEdit);
 
-    path = new VisToolCutArc(data);
+    vis = new VisToolCutArc(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -90,14 +89,7 @@ void DialogCutArc::FXLength()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogCutArc::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, path, &Visualization::SetFactor);
-        scene->addItem(path);
-        path->RefreshGeometry();
-    }
+    AddVisualization<VisToolCutArc>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -109,10 +101,7 @@ void DialogCutArc::DeployFormulaTextEdit()
 //---------------------------------------------------------------------------------------------------------------------
 DialogCutArc::~DialogCutArc()
 {
-    if (qApp->getCurrentScene()->items().contains(path))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete path;
-    }
+    DeleteVisualization<VisToolCutArc>();
     delete ui;
 }
 
@@ -130,7 +119,7 @@ void DialogCutArc::ChosenObject(quint32 id, const SceneObject &type)
         {
             if (SetObject(id, ui->comboBoxArc, ""))
             {
-                path->VisualMode(id);
+                vis->VisualMode(id);
                 prepare = true;
                 this->setModal(true);
                 this->show();
@@ -146,6 +135,9 @@ void DialogCutArc::SaveData()
     formula = ui->plainTextEditFormula->toPlainText();
     formula.replace("\n", " ");
 
+    VisToolCutArc *path = qobject_cast<VisToolCutArc *>(vis);
+    SCASSERT(path != nullptr);
+
     path->setPoint1Id(getArcId());
     path->setLength(formula);
     path->RefreshGeometry();
@@ -166,6 +158,9 @@ void DialogCutArc::closeEvent(QCloseEvent *event)
 void DialogCutArc::setArcId(const quint32 &value)
 {
     setCurrentArcId(ui->comboBoxArc, value, ComboBoxCutArc::CutArc);
+
+    VisToolCutArc *path = qobject_cast<VisToolCutArc *>(vis);
+    SCASSERT(path != nullptr);
     path->setPoint1Id(value);
 }
 
@@ -195,7 +190,11 @@ void DialogCutArc::SetFormula(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formula);
+
+    VisToolCutArc *path = qobject_cast<VisToolCutArc *>(vis);
+    SCASSERT(path != nullptr);
     path->setLength(formula);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
diff --git a/src/app/dialogs/tools/dialogcutarc.h b/src/app/dialogs/tools/dialogcutarc.h
index 5e426cd55..47273ab5a 100644
--- a/src/app/dialogs/tools/dialogcutarc.h
+++ b/src/app/dialogs/tools/dialogcutarc.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogCutArc;
 }
 
-class VisToolCutArc;
-
 /**
  * @brief The DialogCutArc class dialog for ToolCutArc.
  */
@@ -47,7 +45,7 @@ class DialogCutArc : public DialogTool
 public:
 
     DialogCutArc(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogCutArc();
+    virtual ~DialogCutArc();
 
     void              SetPointName(const QString &value);
 
@@ -87,8 +85,6 @@ private:
 
     /** @brief formulaBaseHeight base height defined by dialogui */
     int               formulaBaseHeight;
-
-    VisToolCutArc     *path;
 };
 
 #endif // DIALOGCUTARC_H
diff --git a/src/app/dialogs/tools/dialogcutspline.cpp b/src/app/dialogs/tools/dialogcutspline.cpp
index 8eefa1e0d..d2fae9c24 100644
--- a/src/app/dialogs/tools/dialogcutspline.cpp
+++ b/src/app/dialogs/tools/dialogcutspline.cpp
@@ -42,8 +42,7 @@
  * @param parent parent widget
  */
 DialogCutSpline::DialogCutSpline(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogCutSpline), formula(QString()), formulaBaseHeight(0),
-      path(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogCutSpline), formula(QString()), formulaBaseHeight(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -64,16 +63,13 @@ DialogCutSpline::DialogCutSpline(const VContainer *data, const quint32 &toolId,
     connect(ui->plainTextEditFormula, &QPlainTextEdit::textChanged, this, &DialogCutSpline::FormulaChanged);
     connect(ui->pushButtonGrowLength, &QPushButton::clicked, this, &DialogCutSpline::DeployFormulaTextEdit);
 
-    path = new VisToolCutSpline(data);
+    vis = new VisToolCutSpline(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogCutSpline::~DialogCutSpline()
 {
-    if (qApp->getCurrentScene()->items().contains(path))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete path;
-    }
+    DeleteVisualization<VisToolCutSpline>();
     delete ui;
 }
 
@@ -103,7 +99,11 @@ void DialogCutSpline::SetFormula(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formula);
+
+    VisToolCutSpline *path = qobject_cast<VisToolCutSpline *>(vis);
+    SCASSERT(path != nullptr);
     path->setLength(formula);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
@@ -115,6 +115,9 @@ void DialogCutSpline::SetFormula(const QString &value)
 void DialogCutSpline::setSplineId(const quint32 &value)
 {
     setCurrentSplineId(ui->comboBoxSpline, value, ComboBoxCutSpline::CutSpline);
+
+    VisToolCutSpline *path = qobject_cast<VisToolCutSpline *>(vis);
+    SCASSERT(path != nullptr);
     path->setPoint1Id(value);
 }
 
@@ -144,7 +147,7 @@ void DialogCutSpline::ChosenObject(quint32 id, const SceneObject &type)
         {
             if (SetObject(id, ui->comboBoxSpline, ""))
             {
-                path->VisualMode(id);
+                vis->VisualMode(id);
                 prepare = true;
                 this->setModal(true);
                 this->show();
@@ -160,6 +163,9 @@ void DialogCutSpline::SaveData()
     formula = ui->plainTextEditFormula->toPlainText();
     formula.replace("\n", " ");
 
+    VisToolCutSpline *path = qobject_cast<VisToolCutSpline *>(vis);
+    SCASSERT(path != nullptr);
+
     path->setPoint1Id(getSplineId());
     path->setLength(formula);
     path->RefreshGeometry();
@@ -194,14 +200,7 @@ void DialogCutSpline::FXLength()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogCutSpline::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, path, &Visualization::SetFactor);
-        scene->addItem(path);
-        path->RefreshGeometry();
-    }
+    AddVisualization<VisToolCutSpline>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogcutspline.h b/src/app/dialogs/tools/dialogcutspline.h
index 740ebc746..1ac8d2cce 100644
--- a/src/app/dialogs/tools/dialogcutspline.h
+++ b/src/app/dialogs/tools/dialogcutspline.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogCutSpline;
 }
 
-class VisToolCutSpline;
-
 /**
  * @brief The DialogCutSpline class dialog for ToolCutSpline.
  */
@@ -46,7 +44,7 @@ class DialogCutSpline : public DialogTool
     Q_OBJECT
 public:
     DialogCutSpline(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogCutSpline();
+    virtual ~DialogCutSpline();
 
     void                SetPointName(const QString &value);
 
@@ -83,8 +81,6 @@ private:
 
     /** @brief formulaBaseHeight base height defined by dialogui */
     int                 formulaBaseHeight;
-
-    VisToolCutSpline     *path;
 };
 
 #endif // DIALOGCUTSPLINE_H
diff --git a/src/app/dialogs/tools/dialogcutsplinepath.cpp b/src/app/dialogs/tools/dialogcutsplinepath.cpp
index f2f06812d..993b856c4 100644
--- a/src/app/dialogs/tools/dialogcutsplinepath.cpp
+++ b/src/app/dialogs/tools/dialogcutsplinepath.cpp
@@ -42,8 +42,7 @@
  * @param parent parent widget
  */
 DialogCutSplinePath::DialogCutSplinePath(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogCutSplinePath), formula(QString()), formulaBaseHeight(0),
-      path(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogCutSplinePath), formula(QString()), formulaBaseHeight(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -64,16 +63,13 @@ DialogCutSplinePath::DialogCutSplinePath(const VContainer *data, const quint32 &
     connect(ui->plainTextEditFormula, &QPlainTextEdit::textChanged, this, &DialogCutSplinePath::FormulaChanged);
     connect(ui->pushButtonGrowLength, &QPushButton::clicked, this, &DialogCutSplinePath::DeployFormulaTextEdit);
 
-    path = new VisToolCutSplinePath(data);
+    vis = new VisToolCutSplinePath(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogCutSplinePath::~DialogCutSplinePath()
 {
-    if (qApp->getCurrentScene()->items().contains(path))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete path;
-    }
+    DeleteVisualization<VisToolCutSplinePath>();
     delete ui;
 }
 
@@ -103,7 +99,11 @@ void DialogCutSplinePath::SetFormula(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formula);
+
+    VisToolCutSplinePath *path = qobject_cast<VisToolCutSplinePath *>(vis);
+    SCASSERT(path != nullptr);
     path->setLength(formula);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
@@ -115,6 +115,9 @@ void DialogCutSplinePath::SetFormula(const QString &value)
 void DialogCutSplinePath::setSplinePathId(const quint32 &value)
 {
     setCurrentSplinePathId(ui->comboBoxSplinePath, value, ComboBoxCutSpline::CutSpline);
+
+    VisToolCutSplinePath *path = qobject_cast<VisToolCutSplinePath *>(vis);
+    SCASSERT(path != nullptr);
     path->setPoint1Id(value);
 }
 
@@ -144,7 +147,7 @@ void DialogCutSplinePath::ChosenObject(quint32 id, const SceneObject &type)
         {
             if (SetObject(id, ui->comboBoxSplinePath, ""))
             {
-                path->VisualMode(id);
+                vis->VisualMode(id);
                 prepare = true;
                 this->setModal(true);
                 this->show();
@@ -160,6 +163,9 @@ void DialogCutSplinePath::SaveData()
     formula = ui->plainTextEditFormula->toPlainText();
     formula.replace("\n", " ");
 
+    VisToolCutSplinePath *path = qobject_cast<VisToolCutSplinePath *>(vis);
+    SCASSERT(path != nullptr);
+
     path->setPoint1Id(getSplinePathId());
     path->setLength(formula);
     path->RefreshGeometry();
@@ -194,14 +200,7 @@ void DialogCutSplinePath::FXLength()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogCutSplinePath::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, path, &Visualization::SetFactor);
-        scene->addItem(path);
-        path->RefreshGeometry();
-    }
+    AddVisualization<VisToolCutSplinePath>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogcutsplinepath.h b/src/app/dialogs/tools/dialogcutsplinepath.h
index 892b70e33..b9bbc8727 100644
--- a/src/app/dialogs/tools/dialogcutsplinepath.h
+++ b/src/app/dialogs/tools/dialogcutsplinepath.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogCutSplinePath;
 }
 
-class VisToolCutSplinePath;
-
 /**
  * @brief The DialogCutSplinePath class dialog for ToolCutSplinePath.
  */
@@ -46,7 +44,7 @@ class DialogCutSplinePath : public DialogTool
     Q_OBJECT
 public:
     DialogCutSplinePath(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogCutSplinePath();
+    virtual ~DialogCutSplinePath();
 
     void         SetPointName(const QString &value);
 
@@ -83,8 +81,6 @@ private:
 
     /** @brief formulaBaseHeight base height defined by dialogui */
     int formulaBaseHeight;
-
-    VisToolCutSplinePath *path;
 };
 
 #endif // DIALOGCUTSPLINEPATH_H
diff --git a/src/app/dialogs/tools/dialogeditwrongformula.h b/src/app/dialogs/tools/dialogeditwrongformula.h
index fc6f9d16a..dffb9b228 100644
--- a/src/app/dialogs/tools/dialogeditwrongformula.h
+++ b/src/app/dialogs/tools/dialogeditwrongformula.h
@@ -49,7 +49,7 @@ class DialogEditWrongFormula : public DialogTool
     Q_OBJECT
 public:
     explicit DialogEditWrongFormula(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogEditWrongFormula();
+    virtual ~DialogEditWrongFormula();
 
     QString      GetFormula() const;
     void         SetFormula(const QString &value);
diff --git a/src/app/dialogs/tools/dialogendline.cpp b/src/app/dialogs/tools/dialogendline.cpp
index 27b9891e0..57160defa 100644
--- a/src/app/dialogs/tools/dialogendline.cpp
+++ b/src/app/dialogs/tools/dialogendline.cpp
@@ -45,7 +45,7 @@
  */
 DialogEndLine::DialogEndLine(const VContainer *data, const quint32 &toolId, QWidget *parent)
     :DialogTool(data, toolId, parent), ui(new Ui::DialogEndLine),
-      formulaLength(QString()), formulaAngle(QString()), formulaBaseHeight(0), formulaBaseHeightAngle(0), line(nullptr)
+      formulaLength(QString()), formulaAngle(QString()), formulaBaseHeight(0), formulaBaseHeightAngle(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -78,7 +78,7 @@ DialogEndLine::DialogEndLine(const VContainer *data, const quint32 &toolId, QWid
 
     connect(timerFormula, &QTimer::timeout, this, &DialogEndLine::EvalAngle);
 
-    line = new VisToolEndLine(data);
+    vis = new VisToolEndLine(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -158,8 +158,8 @@ void DialogEndLine::ChosenObject(quint32 id, const SceneObject &type)
         {
             if (SetObject(id, ui->comboBoxBasePoint, ""))
             {
-                line->VisualMode(id);
-                connect(line, &VisToolEndLine::ToolTip, this, &DialogTool::ShowVisToolTip);
+                vis->VisualMode(id);
+                connect(vis, &Visualization::ToolTip, this, &DialogTool::ShowVisToolTip);
                 prepare = true;
             }
         }
@@ -185,7 +185,7 @@ void DialogEndLine::SetPointName(const QString &value)
 void DialogEndLine::SetTypeLine(const QString &value)
 {
     ChangeCurrentData(ui->comboBoxLineType, value);
-    line->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
+    vis->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -203,7 +203,11 @@ void DialogEndLine::SetFormula(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formulaLength);
+
+    VisToolEndLine *line = qobject_cast<VisToolEndLine *>(vis);
+    SCASSERT(line != nullptr);
     line->setLength(formulaLength);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
@@ -222,7 +226,11 @@ void DialogEndLine::SetAngle(const QString &value)
         this->DeployAngleTextEdit();
     }
     ui->plainTextEditAngle->setPlainText(formulaAngle);
+
+    VisToolEndLine *line = qobject_cast<VisToolEndLine *>(vis);
+    SCASSERT(line != nullptr);
     line->SetAngle(formulaAngle);
+
     MoveCursorToEnd(ui->plainTextEditAngle);
 }
 
@@ -234,6 +242,9 @@ void DialogEndLine::SetAngle(const QString &value)
 void DialogEndLine::SetBasePointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxBasePoint, value);
+
+    VisToolEndLine *line = qobject_cast<VisToolEndLine *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -274,6 +285,10 @@ void DialogEndLine::ShowDialog(bool click)
             }
         }
         this->setModal(true);
+
+        VisToolEndLine *line = qobject_cast<VisToolEndLine *>(vis);
+        SCASSERT(line != nullptr);
+
         this->SetAngle(line->Angle());//Show in dialog angle what user choose
         emit ToolTip("");
         timerFormula->start();
@@ -284,15 +299,7 @@ void DialogEndLine::ShowDialog(bool click)
 //---------------------------------------------------------------------------------------------------------------------
 void DialogEndLine::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        //TODO move to parent class!
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisToolEndLine::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolEndLine>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -306,6 +313,9 @@ void DialogEndLine::SaveData()
     formulaAngle = ui->plainTextEditAngle->toPlainText();
     formulaAngle.replace("\n", " ");
 
+    VisToolEndLine *line = qobject_cast<VisToolEndLine *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetBasePointId());
     line->setLength(formulaLength);
     line->SetAngle(formulaAngle);
@@ -324,10 +334,7 @@ void DialogEndLine::closeEvent(QCloseEvent *event)
 //---------------------------------------------------------------------------------------------------------------------
 DialogEndLine::~DialogEndLine()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolEndLine>();
     delete ui;
 }
 
diff --git a/src/app/dialogs/tools/dialogendline.h b/src/app/dialogs/tools/dialogendline.h
index dfaf7b4c0..0164e3fb1 100644
--- a/src/app/dialogs/tools/dialogendline.h
+++ b/src/app/dialogs/tools/dialogendline.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogEndLine;
 }
 
-class VisToolEndLine;
-
 /**
  * @brief The DialogEndLine class dialog for ToolEndLine. Help create point and edit option.
  */
@@ -46,7 +44,7 @@ class DialogEndLine : public DialogTool
     Q_OBJECT
 public:
     DialogEndLine(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogEndLine();
+    virtual ~DialogEndLine();
 
     void              SetPointName(const QString &value);
 
@@ -105,8 +103,6 @@ private:
     /** @brief formulaBaseHeight base height defined by dialogui */
     int               formulaBaseHeight;
     int               formulaBaseHeightAngle;
-
-    VisToolEndLine    *line;
 };
 
 #endif // DIALOGENDLINE_H
diff --git a/src/app/dialogs/tools/dialogheight.cpp b/src/app/dialogs/tools/dialogheight.cpp
index 9440e517a..d4b55f498 100644
--- a/src/app/dialogs/tools/dialogheight.cpp
+++ b/src/app/dialogs/tools/dialogheight.cpp
@@ -42,7 +42,7 @@
  * @param parent parent widget
  */
 DialogHeight::DialogHeight(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogHeight), line(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogHeight)
 {
     ui->setupUi(this);
     ui->lineEditNamePoint->setText(qApp->getCurrentDocument()->GenerateLabel(LabelType::NewLabel));
@@ -64,16 +64,13 @@ DialogHeight::DialogHeight(const VContainer *data, const quint32 &toolId, QWidge
     connect(ui->comboBoxP2Line, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogHeight::PointNameChanged);
 
-    line = new VisToolHeight(data);
+    vis = new VisToolHeight(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogHeight::~DialogHeight()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolHeight>();
     delete ui;
 }
 
@@ -96,7 +93,7 @@ void DialogHeight::SetPointName(const QString &value)
 void DialogHeight::SetTypeLine(const QString &value)
 {
     ChangeCurrentData(ui->comboBoxLineType, value);
-    line->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
+    vis->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -107,6 +104,9 @@ void DialogHeight::SetTypeLine(const QString &value)
 void DialogHeight::SetBasePointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxBasePoint, value);
+
+    VisToolHeight *line = qobject_cast<VisToolHeight *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -118,6 +118,9 @@ void DialogHeight::SetBasePointId(const quint32 &value)
 void DialogHeight::SetP1LineId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP1Line, value);
+
+    VisToolHeight *line = qobject_cast<VisToolHeight *>(vis);
+    SCASSERT(line != nullptr);
     line->setLineP1Id(value);
 }
 
@@ -129,6 +132,9 @@ void DialogHeight::SetP1LineId(const quint32 &value)
 void DialogHeight::SetP2LineId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP2Line, value);
+
+    VisToolHeight *line = qobject_cast<VisToolHeight *>(vis);
+    SCASSERT(line != nullptr);
     line->setLineP2Id(value);
 }
 
@@ -156,6 +162,9 @@ void DialogHeight::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolHeight *line = qobject_cast<VisToolHeight *>(vis);
+            SCASSERT(line != nullptr);
+
             switch (number)
             {
                 case (0):
@@ -208,6 +217,9 @@ void DialogHeight::SaveData()
 {
     pointName = ui->lineEditNamePoint->text();
 
+    VisToolHeight *line = qobject_cast<VisToolHeight *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetBasePointId());
     line->setLineP1Id(GetP1LineId());
     line->setLineP2Id(GetP2LineId());
@@ -252,14 +264,7 @@ void DialogHeight::PointNameChanged()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogHeight::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisLine::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisLine>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogheight.h b/src/app/dialogs/tools/dialogheight.h
index 7f96cfffb..11bf3fcbe 100644
--- a/src/app/dialogs/tools/dialogheight.h
+++ b/src/app/dialogs/tools/dialogheight.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogHeight;
 }
 
-class VisToolHeight;
-
 /**
  * @brief The DialogHeight class dialog for ToolHeight. Help create point and edit option.
  */
@@ -46,7 +44,7 @@ class DialogHeight : public DialogTool
     Q_OBJECT
 public:
     DialogHeight(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogHeight();
+    virtual ~DialogHeight();
 
     void             SetPointName(const QString &value);
 
@@ -78,8 +76,6 @@ private:
 
     /** @brief ui keeps information about user interface */
     Ui::DialogHeight *ui;
-
-    VisToolHeight    *line;
 };
 
 #endif // DIALOGHEIGHT_H
diff --git a/src/app/dialogs/tools/dialogline.cpp b/src/app/dialogs/tools/dialogline.cpp
index 218deabb2..d474f2362 100644
--- a/src/app/dialogs/tools/dialogline.cpp
+++ b/src/app/dialogs/tools/dialogline.cpp
@@ -43,7 +43,7 @@
  * @param parent parent widget
  */
 DialogLine::DialogLine(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogLine), line(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogLine)
 {
     ui->setupUi(this);
     InitOkCancelApply(ui);
@@ -63,16 +63,13 @@ DialogLine::DialogLine(const VContainer *data, const quint32 &toolId, QWidget *p
     connect(ui->comboBoxSecondPoint, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogLine::PointNameChanged);
 
-    line = new VisToolLine(data);
+    vis = new VisToolLine(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogLine::~DialogLine()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolLine>();
     delete ui;
 }
 
@@ -84,6 +81,9 @@ DialogLine::~DialogLine()
 void DialogLine::SetSecondPoint(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxSecondPoint, value);
+
+    VisToolLine *line = qobject_cast<VisToolLine *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint2Id(value);
 }
 
@@ -95,7 +95,7 @@ void DialogLine::SetSecondPoint(const quint32 &value)
 void DialogLine::SetTypeLine(const QString &value)
 {
     ChangeCurrentData(ui->comboBoxLineType, value);
-    line->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
+    vis->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -118,6 +118,9 @@ void DialogLine::SetLineColor(const QString &value)
 void DialogLine::SetFirstPoint(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxFirstPoint, value);
+
+    VisToolLine *line = qobject_cast<VisToolLine *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -143,19 +146,15 @@ void DialogLine::PointNameChanged()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogLine::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisToolLine::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolLine>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 void DialogLine::SaveData()
 {
+    VisToolLine *line = qobject_cast<VisToolLine *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetFirstPoint());
     line->setPoint2Id(GetSecondPoint());
     line->setLineStyle(VAbstractTool::LineStyleToPenStyle(GetTypeLine()));
@@ -180,7 +179,7 @@ void DialogLine::ChosenObject(quint32 id, const SceneObject &type)
                     if (SetObject(id, ui->comboBoxFirstPoint, tr("Select second point")))
                     {
                         number++;
-                        line->VisualMode(id);
+                        vis->VisualMode(id);
                     }
                     break;
                 case 1:
diff --git a/src/app/dialogs/tools/dialogline.h b/src/app/dialogs/tools/dialogline.h
index bb07c9b1e..cde718e56 100644
--- a/src/app/dialogs/tools/dialogline.h
+++ b/src/app/dialogs/tools/dialogline.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogLine;
 }
 
-class VisToolLine;
-
 /**
  * @brief The DialogLine class dialog for ToolLine. Help create line and edit option.
  */
@@ -46,7 +44,7 @@ class DialogLine : public DialogTool
     Q_OBJECT
 public:
     DialogLine(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogLine();
+    virtual ~DialogLine();
 
     quint32        GetFirstPoint() const;
     void           SetFirstPoint(const quint32 &value);
@@ -73,9 +71,6 @@ private:
 
     /** @brief ui keeps information about user interface */
     Ui::DialogLine *ui;
-
-    VisToolLine    *line;
-
 };
 
 #endif // DIALOGLINE_H
diff --git a/src/app/dialogs/tools/dialoglineintersect.cpp b/src/app/dialogs/tools/dialoglineintersect.cpp
index 084373e2c..8f523c833 100644
--- a/src/app/dialogs/tools/dialoglineintersect.cpp
+++ b/src/app/dialogs/tools/dialoglineintersect.cpp
@@ -42,7 +42,7 @@
  * @param parent parent widget
  */
 DialogLineIntersect::DialogLineIntersect(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogLineIntersect), flagPoint(true), line(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogLineIntersect), flagPoint(true)
 {
     ui->setupUi(this);
     number = 0;
@@ -65,16 +65,13 @@ DialogLineIntersect::DialogLineIntersect(const VContainer *data, const quint32 &
     connect(ui->comboBoxP2Line2, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogLineIntersect::PointNameChanged);
 
-    line = new VisToolLineIntersect(data);
+    vis = new VisToolLineIntersect(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogLineIntersect::~DialogLineIntersect()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolLineIntersect>();
     delete ui;
 }
 
@@ -90,6 +87,9 @@ void DialogLineIntersect::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolLineIntersect *line = qobject_cast<VisToolLineIntersect *>(vis);
+            SCASSERT(line != nullptr);
+
             switch (number)
             {
                 case 0:
@@ -165,6 +165,9 @@ void DialogLineIntersect::SaveData()
 {
     pointName = ui->lineEditNamePoint->text();
 
+    VisToolLineIntersect *line = qobject_cast<VisToolLineIntersect *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetP1Line1());
     line->setLine1P2Id(GetP2Line1());
     line->setLine2P1Id(GetP1Line2());
@@ -227,14 +230,7 @@ void DialogLineIntersect::PointNameChanged()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogLineIntersect::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisLine::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolLineIntersect>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -281,6 +277,9 @@ bool DialogLineIntersect::CheckIntersecion()
 void DialogLineIntersect::SetP2Line2(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP2Line2, value);
+
+    VisToolLineIntersect *line = qobject_cast<VisToolLineIntersect *>(vis);
+    SCASSERT(line != nullptr);
     line->setLine2P2Id(value);
 }
 
@@ -292,6 +291,9 @@ void DialogLineIntersect::SetP2Line2(const quint32 &value)
 void DialogLineIntersect::SetP1Line2(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP1Line2, value);
+
+    VisToolLineIntersect *line = qobject_cast<VisToolLineIntersect *>(vis);
+    SCASSERT(line != nullptr);
     line->setLine2P1Id(value);
 }
 
@@ -303,6 +305,9 @@ void DialogLineIntersect::SetP1Line2(const quint32 &value)
 void DialogLineIntersect::SetP2Line1(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP2Line1, value);
+
+    VisToolLineIntersect *line = qobject_cast<VisToolLineIntersect *>(vis);
+    SCASSERT(line != nullptr);
     line->setLine1P2Id(value);
 }
 
@@ -314,6 +319,9 @@ void DialogLineIntersect::SetP2Line1(const quint32 &value)
 void DialogLineIntersect::SetP1Line1(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP1Line1, value);
+
+    VisToolLineIntersect *line = qobject_cast<VisToolLineIntersect *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
diff --git a/src/app/dialogs/tools/dialoglineintersect.h b/src/app/dialogs/tools/dialoglineintersect.h
index deedc9587..76bbca1a9 100644
--- a/src/app/dialogs/tools/dialoglineintersect.h
+++ b/src/app/dialogs/tools/dialoglineintersect.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogLineIntersect;
 }
 
-class VisToolLineIntersect;
-
 /**
  * @brief The DialogLineIntersect class dialog for ToolLineIntersect. Help create point and edit option.
  */
@@ -46,7 +44,7 @@ class DialogLineIntersect : public DialogTool
     Q_OBJECT
 public:
     DialogLineIntersect(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogLineIntersect();
+    virtual ~DialogLineIntersect();
 
     quint32                 GetP1Line1() const;
     void                    SetP1Line1(const quint32 &value);
@@ -80,8 +78,6 @@ private:
     /** @brief flagPoint keep state of point */
     bool                    flagPoint;
 
-    VisToolLineIntersect    *line;
-
     virtual void            CheckState();
     bool                    CheckIntersecion();
 };
diff --git a/src/app/dialogs/tools/dialoglineintersectaxis.cpp b/src/app/dialogs/tools/dialoglineintersectaxis.cpp
index d9aac1dd7..9143047c1 100644
--- a/src/app/dialogs/tools/dialoglineintersectaxis.cpp
+++ b/src/app/dialogs/tools/dialoglineintersectaxis.cpp
@@ -41,7 +41,7 @@
 //---------------------------------------------------------------------------------------------------------------------
 DialogLineIntersectAxis::DialogLineIntersectAxis(const VContainer *data, const quint32 &toolId, QWidget *parent)
     :DialogTool(data, toolId, parent), ui(new Ui::DialogLineIntersectAxis), formulaAngle(QString()),
-      formulaBaseHeightAngle(0), line(nullptr)
+      formulaBaseHeightAngle(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -74,16 +74,13 @@ DialogLineIntersectAxis::DialogLineIntersectAxis(const VContainer *data, const q
     connect(ui->comboBoxAxisPoint, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogLineIntersectAxis::PointNameChanged);
 
-    line = new VisToolLineIntersectAxis(data);
+    vis = new VisToolLineIntersectAxis(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogLineIntersectAxis::~DialogLineIntersectAxis()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolLineIntersectAxis>();
     delete ui;
 }
 
@@ -104,7 +101,7 @@ QString DialogLineIntersectAxis::GetTypeLine() const
 void DialogLineIntersectAxis::SetTypeLine(const QString &value)
 {
     ChangeCurrentData(ui->comboBoxLineType, value);
-    line->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
+    vis->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -124,7 +121,11 @@ void DialogLineIntersectAxis::SetAngle(const QString &value)
         this->DeployAngleTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formulaAngle);
+
+    VisToolLineIntersectAxis *line = qobject_cast<VisToolLineIntersectAxis *>(vis);
+    SCASSERT(line != nullptr);
     line->SetAngle(formulaAngle);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
@@ -138,6 +139,9 @@ quint32 DialogLineIntersectAxis::GetBasePointId() const
 void DialogLineIntersectAxis::SetBasePointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxAxisPoint, value);
+
+    VisToolLineIntersectAxis *line = qobject_cast<VisToolLineIntersectAxis *>(vis);
+    SCASSERT(line != nullptr);
     line->setAxisPointId(value);
 }
 
@@ -151,6 +155,9 @@ quint32 DialogLineIntersectAxis::GetFirstPointId() const
 void DialogLineIntersectAxis::SetFirstPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxFirstLinePoint, value);
+
+    VisToolLineIntersectAxis *line = qobject_cast<VisToolLineIntersectAxis *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -164,6 +171,9 @@ quint32 DialogLineIntersectAxis::GetSecondPointId() const
 void DialogLineIntersectAxis::SetSecondPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxSecondLinePoint, value);
+
+    VisToolLineIntersectAxis *line = qobject_cast<VisToolLineIntersectAxis *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint2Id(value);
 }
 
@@ -200,6 +210,10 @@ void DialogLineIntersectAxis::ShowDialog(bool click)
             }
         }
         this->setModal(true);
+
+        VisToolLineIntersectAxis *line = qobject_cast<VisToolLineIntersectAxis *>(vis);
+        SCASSERT(line != nullptr);
+
         this->SetAngle(line->Angle());//Show in dialog angle what user choose
         emit ToolTip("");
         timerFormula->start();
@@ -214,6 +228,9 @@ void DialogLineIntersectAxis::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolLineIntersectAxis *line = qobject_cast<VisToolLineIntersectAxis *>(vis);
+            SCASSERT(line != nullptr);
+
             switch (number)
             {
                 case (0):
@@ -319,15 +336,7 @@ void DialogLineIntersectAxis::FXAngle()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogLineIntersectAxis::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        //TODO move to parent class!
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisToolLineIntersectAxis::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolLineIntersectAxis>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -338,6 +347,9 @@ void DialogLineIntersectAxis::SaveData()
     formulaAngle = ui->plainTextEditFormula->toPlainText();
     formulaAngle.replace("\n", " ");
 
+    VisToolLineIntersectAxis *line = qobject_cast<VisToolLineIntersectAxis *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetFirstPointId());
     line->setPoint2Id(GetSecondPointId());
     line->setAxisPointId(GetBasePointId());
diff --git a/src/app/dialogs/tools/dialoglineintersectaxis.h b/src/app/dialogs/tools/dialoglineintersectaxis.h
index f9aaa4dfb..d8975889d 100644
--- a/src/app/dialogs/tools/dialoglineintersectaxis.h
+++ b/src/app/dialogs/tools/dialoglineintersectaxis.h
@@ -36,15 +36,13 @@ namespace Ui
     class DialogLineIntersectAxis;
 }
 
-class VisToolLineIntersectAxis;
-
 class DialogLineIntersectAxis : public DialogTool
 {
     Q_OBJECT
 
 public:
     DialogLineIntersectAxis(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogLineIntersectAxis();
+    virtual ~DialogLineIntersectAxis();
 
     void         SetPointName(const QString &value);
 
@@ -87,8 +85,6 @@ private:
 
     QString formulaAngle;
     int     formulaBaseHeightAngle;
-
-    VisToolLineIntersectAxis *line;
 };
 
 #endif // DIALOGLINEINTERSECTAXIS_H
diff --git a/src/app/dialogs/tools/dialognormal.cpp b/src/app/dialogs/tools/dialognormal.cpp
index fe54d4703..edbee2001 100644
--- a/src/app/dialogs/tools/dialognormal.cpp
+++ b/src/app/dialogs/tools/dialognormal.cpp
@@ -40,8 +40,7 @@
  * @param parent parent widget
  */
 DialogNormal::DialogNormal(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogNormal), formula(QString()), angle(0), formulaBaseHeight(0),
-      line(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogNormal), formula(QString()), angle(0), formulaBaseHeight(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -70,7 +69,7 @@ DialogNormal::DialogNormal(const VContainer *data, const quint32 &toolId, QWidge
     connect(ui->comboBoxSecondPoint, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogNormal::PointNameChanged);
 
-    line = new VisToolNormal(data);
+    vis = new VisToolNormal(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -114,14 +113,7 @@ void DialogNormal::FXLength()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogNormal::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisLine::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolNormal>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -133,10 +125,7 @@ void DialogNormal::DeployFormulaTextEdit()
 //---------------------------------------------------------------------------------------------------------------------
 DialogNormal::~DialogNormal()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolNormal>();
     delete ui;
 }
 
@@ -152,6 +141,9 @@ void DialogNormal::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolNormal *line = qobject_cast<VisToolNormal *>(vis);
+            SCASSERT(line != nullptr);
+
             switch (number)
             {
                 case 0:
@@ -189,6 +181,9 @@ void DialogNormal::SaveData()
     formula.replace("\n", " ");
     angle = ui->doubleSpinBoxAngle->value();
 
+    VisToolNormal *line = qobject_cast<VisToolNormal *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetFirstPointId());
     line->setPoint2Id(GetSecondPointId());
     line->setLength(formula);
@@ -212,6 +207,9 @@ void DialogNormal::closeEvent(QCloseEvent *event)
 void DialogNormal::SetSecondPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxSecondPoint, value);
+
+    VisToolNormal *line = qobject_cast<VisToolNormal *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint2Id(value);
 }
 
@@ -235,6 +233,9 @@ void DialogNormal::SetLineColor(const QString &value)
 void DialogNormal::SetFirstPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxFirstPoint, value);
+
+    VisToolNormal *line = qobject_cast<VisToolNormal *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -247,6 +248,9 @@ void DialogNormal::SetAngle(const qreal &value)
 {
     angle = value;
     ui->doubleSpinBoxAngle->setValue(angle);
+
+    VisToolNormal *line = qobject_cast<VisToolNormal *>(vis);
+    SCASSERT(line != nullptr);
     line->SetAngle(angle);
 }
 
@@ -264,7 +268,11 @@ void DialogNormal::SetFormula(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formula);
+
+    VisToolNormal *line = qobject_cast<VisToolNormal *>(vis);
+    SCASSERT(line != nullptr);
     line->setLength(formula);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
@@ -276,7 +284,7 @@ void DialogNormal::SetFormula(const QString &value)
 void DialogNormal::SetTypeLine(const QString &value)
 {
     ChangeCurrentData(ui->comboBoxLineType, value);
-    line->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
+    vis->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialognormal.h b/src/app/dialogs/tools/dialognormal.h
index 39c1fbb55..b07ae1b55 100644
--- a/src/app/dialogs/tools/dialognormal.h
+++ b/src/app/dialogs/tools/dialognormal.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogNormal;
 }
 
-class VisToolNormal;
-
 /**
  * @brief The DialogNormal class dialog for ToolNormal. Help create point and edit option.
  */
@@ -46,7 +44,7 @@ class DialogNormal : public DialogTool
     Q_OBJECT
 public:
     DialogNormal(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogNormal();
+    virtual ~DialogNormal();
 
     void             SetPointName(const QString &value);
 
@@ -100,8 +98,6 @@ private:
 
     /** @brief formulaBaseHeight base height defined by dialogui */
     int              formulaBaseHeight;
-
-    VisToolNormal    *line;
 };
 
 #endif // DIALOGNORMAL_H
diff --git a/src/app/dialogs/tools/dialogpointofcontact.cpp b/src/app/dialogs/tools/dialogpointofcontact.cpp
index 694ab9cdc..0dbd1de0d 100644
--- a/src/app/dialogs/tools/dialogpointofcontact.cpp
+++ b/src/app/dialogs/tools/dialogpointofcontact.cpp
@@ -42,8 +42,7 @@
  * @param parent parent widget
  */
 DialogPointOfContact::DialogPointOfContact(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogPointOfContact),
-      radius(QString()), formulaBaseHeight(0), line(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogPointOfContact), radius(QString()), formulaBaseHeight(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -71,16 +70,13 @@ DialogPointOfContact::DialogPointOfContact(const VContainer *data, const quint32
     connect(ui->comboBoxCenter, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogPointOfContact::PointNameChanged);
 
-    line = new VisToolPointOfContact(data);
+    vis = new VisToolPointOfContact(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogPointOfContact::~DialogPointOfContact()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolPointOfContact>();
     delete ui;
 }
 
@@ -131,14 +127,7 @@ void DialogPointOfContact::FXRadius()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogPointOfContact::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisLine::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolPointOfContact>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -159,6 +148,9 @@ void DialogPointOfContact::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolPointOfContact *line = qobject_cast<VisToolPointOfContact *>(vis);
+            SCASSERT(line != nullptr);
+
             switch (number)
             {
                 case 0:
@@ -213,6 +205,9 @@ void DialogPointOfContact::SaveData()
     radius = ui->plainTextEditFormula->toPlainText();
     radius.replace("\n", " ");
 
+    VisToolPointOfContact *line = qobject_cast<VisToolPointOfContact *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetFirstPoint());
     line->setLineP2Id(GetSecondPoint());
     line->setRadiusId(getCenter());
@@ -235,6 +230,9 @@ void DialogPointOfContact::closeEvent(QCloseEvent *event)
 void DialogPointOfContact::SetSecondPoint(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxSecondPoint, value);
+
+    VisToolPointOfContact *line = qobject_cast<VisToolPointOfContact *>(vis);
+    SCASSERT(line != nullptr);
     line->setLineP2Id(value);
 }
 
@@ -246,6 +244,9 @@ void DialogPointOfContact::SetSecondPoint(const quint32 &value)
 void DialogPointOfContact::SetFirstPoint(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxFirstPoint, value);
+
+    VisToolPointOfContact *line = qobject_cast<VisToolPointOfContact *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -257,6 +258,9 @@ void DialogPointOfContact::SetFirstPoint(const quint32 &value)
 void DialogPointOfContact::setCenter(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxCenter, value);
+
+    VisToolPointOfContact *line = qobject_cast<VisToolPointOfContact *>(vis);
+    SCASSERT(line != nullptr);
     line->setRadiusId(value);
 }
 
@@ -274,7 +278,11 @@ void DialogPointOfContact::setRadius(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(radius);
+
+    VisToolPointOfContact *line = qobject_cast<VisToolPointOfContact *>(vis);
+    SCASSERT(line != nullptr);
     line->setRadius(radius);
+
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
 
diff --git a/src/app/dialogs/tools/dialogpointofcontact.h b/src/app/dialogs/tools/dialogpointofcontact.h
index d3d59f51b..3104d9036 100644
--- a/src/app/dialogs/tools/dialogpointofcontact.h
+++ b/src/app/dialogs/tools/dialogpointofcontact.h
@@ -37,8 +37,6 @@ namespace Ui
     class DialogPointOfContact;
 }
 
-class VisToolPointOfContact;
-
 /**
  * @brief The DialogPointOfContact class dialog for ToolPointOfContact. Help create point and edit option.
  */
@@ -92,8 +90,6 @@ private:
 
     /** @brief formulaBaseHeight base height defined by dialogui */
     int             formulaBaseHeight;
-
-    VisToolPointOfContact *line;
 };
 
 #endif // DIALOGPOINTOFCONTACT_H
diff --git a/src/app/dialogs/tools/dialogpointofintersection.cpp b/src/app/dialogs/tools/dialogpointofintersection.cpp
index b122108a7..1c60117e5 100644
--- a/src/app/dialogs/tools/dialogpointofintersection.cpp
+++ b/src/app/dialogs/tools/dialogpointofintersection.cpp
@@ -42,7 +42,7 @@
  * @param parent parent widget
  */
 DialogPointOfIntersection::DialogPointOfIntersection(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogPointOfIntersection), line(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogPointOfIntersection)
 {
     ui->setupUi(this);
     ui->lineEditNamePoint->setText(qApp->getCurrentDocument()->GenerateLabel(LabelType::NewLabel));
@@ -60,17 +60,14 @@ DialogPointOfIntersection::DialogPointOfIntersection(const VContainer *data, con
     connect(ui->comboBoxSecondPoint, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogPointOfIntersection::PointNameChanged);
 
-    line = new VisToolPointOfIntersection(data);
-    line->VisualMode(NULL_ID);
+    vis = new VisToolPointOfIntersection(data);
+    vis->VisualMode(NULL_ID);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogPointOfIntersection::~DialogPointOfIntersection()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolPointOfIntersection>();
     delete ui;
 }
 
@@ -82,6 +79,9 @@ DialogPointOfIntersection::~DialogPointOfIntersection()
 void DialogPointOfIntersection::SetSecondPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxSecondPoint, value);
+
+    VisToolPointOfIntersection *line = qobject_cast<VisToolPointOfIntersection *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint2Id(value);
 }
 
@@ -97,6 +97,9 @@ void DialogPointOfIntersection::ChosenObject(quint32 id, const SceneObject &type
     {
         if (type == SceneObject::Point)
         {
+            VisToolPointOfIntersection *line = qobject_cast<VisToolPointOfIntersection *>(vis);
+            SCASSERT(line != nullptr);
+
             switch (number)
             {
                 case 0:
@@ -132,6 +135,9 @@ void DialogPointOfIntersection::SaveData()
 {
     pointName = ui->lineEditNamePoint->text();
 
+    VisToolPointOfIntersection *line = qobject_cast<VisToolPointOfIntersection *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetFirstPointId());
     line->setPoint2Id(GetSecondPointId());
     line->RefreshGeometry();
@@ -162,9 +168,13 @@ void DialogPointOfIntersection::ShowVisualization()
     if (prepare == false)
     {
         VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisLine::SetFactor);
-        line->RefreshGeometry();
+        SCASSERT(scene != nullptr);
+
+        VisToolPointOfIntersection *toolVis = qobject_cast<VisToolPointOfIntersection *>(vis);
+        SCASSERT(toolVis != nullptr);
+
+        connect(scene, &VMainGraphicsScene::NewFactor, toolVis, &Visualization::SetFactor);
+        toolVis->RefreshGeometry();
     }
 }
 
@@ -176,6 +186,9 @@ void DialogPointOfIntersection::ShowVisualization()
 void DialogPointOfIntersection::SetFirstPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxFirstPoint, value);
+
+    VisToolPointOfIntersection *line = qobject_cast<VisToolPointOfIntersection *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
diff --git a/src/app/dialogs/tools/dialogpointofintersection.h b/src/app/dialogs/tools/dialogpointofintersection.h
index 5b76bab47..651c4c5c8 100644
--- a/src/app/dialogs/tools/dialogpointofintersection.h
+++ b/src/app/dialogs/tools/dialogpointofintersection.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogPointOfIntersection;
 }
 
-class VisToolPointOfIntersection;
-
 /**
  * @brief The DialogPointOfIntersection class dialog for ToolPointOfIntersection. Help create point and edit option.
  */
@@ -46,7 +44,7 @@ class DialogPointOfIntersection : public DialogTool
     Q_OBJECT
 public:
     DialogPointOfIntersection(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogPointOfIntersection();
+    virtual ~DialogPointOfIntersection();
 
     void           SetPointName(const QString &value);
 
@@ -69,8 +67,6 @@ private:
 
     /** @brief ui keeps information about user interface */
     Ui::DialogPointOfIntersection *ui;
-
-    VisToolPointOfIntersection *line;
 };
 
 #endif // DIALOGPOINTOFINTERSECTION_H
diff --git a/src/app/dialogs/tools/dialogshoulderpoint.cpp b/src/app/dialogs/tools/dialogshoulderpoint.cpp
index 33194dbce..09bae04ab 100644
--- a/src/app/dialogs/tools/dialogshoulderpoint.cpp
+++ b/src/app/dialogs/tools/dialogshoulderpoint.cpp
@@ -44,7 +44,7 @@
  */
 DialogShoulderPoint::DialogShoulderPoint(const VContainer *data, const quint32 &toolId, QWidget *parent)
     :DialogTool(data, toolId, parent), ui(new Ui::DialogShoulderPoint), formula(QString()),
-      formulaBaseHeight(0), line (nullptr)
+      formulaBaseHeight(0)
 {
     ui->setupUi(this);
     InitFormulaUI(ui);
@@ -74,7 +74,7 @@ DialogShoulderPoint::DialogShoulderPoint(const VContainer *data, const quint32 &
     connect(ui->comboBoxP3, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogShoulderPoint::PointNameChanged);
 
-    line = new VisToolShoulderPoint(data);
+    vis = new VisToolShoulderPoint(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -124,14 +124,7 @@ void DialogShoulderPoint::FXLength()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogShoulderPoint::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisLine::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolShoulderPoint>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -143,10 +136,7 @@ void DialogShoulderPoint::DeployFormulaTextEdit()
 //---------------------------------------------------------------------------------------------------------------------
 DialogShoulderPoint::~DialogShoulderPoint()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolShoulderPoint>();
     delete ui;
 }
 
@@ -162,6 +152,9 @@ void DialogShoulderPoint::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolShoulderPoint *line = qobject_cast<VisToolShoulderPoint *>(vis);
+            SCASSERT(line != nullptr);
+
             switch (number)
             {
                 case 0:
@@ -216,6 +209,9 @@ void DialogShoulderPoint::SaveData()
     formula = ui->plainTextEditFormula->toPlainText();
     formula.replace("\n", " ");
 
+    VisToolShoulderPoint *line = qobject_cast<VisToolShoulderPoint *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetP3());
     line->setLineP1Id(GetP1Line());
     line->setLineP2Id(GetP2Line());
@@ -239,6 +235,9 @@ void DialogShoulderPoint::closeEvent(QCloseEvent *event)
 void DialogShoulderPoint::SetP3(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP3, value);
+
+    VisToolShoulderPoint *line = qobject_cast<VisToolShoulderPoint *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
@@ -262,6 +261,9 @@ void DialogShoulderPoint::SetLineColor(const QString &value)
 void DialogShoulderPoint::SetP2Line(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP2Line, value);
+
+    VisToolShoulderPoint *line = qobject_cast<VisToolShoulderPoint *>(vis);
+    SCASSERT(line != nullptr);
     line->setLineP2Id(value);
 }
 
@@ -273,6 +275,9 @@ void DialogShoulderPoint::SetP2Line(const quint32 &value)
 void DialogShoulderPoint::SetP1Line(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP1Line, value);
+
+    VisToolShoulderPoint *line = qobject_cast<VisToolShoulderPoint *>(vis);
+    SCASSERT(line != nullptr);
     line->setLineP1Id(value);
 }
 
@@ -290,6 +295,9 @@ void DialogShoulderPoint::SetFormula(const QString &value)
         this->DeployFormulaTextEdit();
     }
     ui->plainTextEditFormula->setPlainText(formula);
+
+    VisToolShoulderPoint *line = qobject_cast<VisToolShoulderPoint *>(vis);
+    SCASSERT(line != nullptr);
     line->setLength(formula);
     MoveCursorToEnd(ui->plainTextEditFormula);
 }
@@ -302,7 +310,7 @@ void DialogShoulderPoint::SetFormula(const QString &value)
 void DialogShoulderPoint::SetTypeLine(const QString &value)
 {
     ChangeCurrentData(ui->comboBoxLineType, value);
-    line->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
+    vis->setLineStyle(VAbstractTool::LineStyleToPenStyle(value));
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogshoulderpoint.h b/src/app/dialogs/tools/dialogshoulderpoint.h
index 6360d75cf..f60e55d59 100644
--- a/src/app/dialogs/tools/dialogshoulderpoint.h
+++ b/src/app/dialogs/tools/dialogshoulderpoint.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogShoulderPoint;
 }
 
-class VisToolShoulderPoint;
-
 /**
  * @brief The DialogShoulderPoint class dialog for ToolShoulderPoint. Help create point and edit option.
  */
@@ -46,7 +44,7 @@ class DialogShoulderPoint : public DialogTool
     Q_OBJECT
 public:
     DialogShoulderPoint(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogShoulderPoint();
+    virtual ~DialogShoulderPoint();
 
     void           SetPointName(const QString &value);
 
@@ -97,7 +95,6 @@ private:
 
     /** @brief formulaBaseHeight base height defined by dialogui */
     int             formulaBaseHeight;
-    VisToolShoulderPoint *line;
 };
 
 #endif // DIALOGSHOULDERPOINT_H
diff --git a/src/app/dialogs/tools/dialogsinglepoint.h b/src/app/dialogs/tools/dialogsinglepoint.h
index c9d8098c1..79e48e980 100644
--- a/src/app/dialogs/tools/dialogsinglepoint.h
+++ b/src/app/dialogs/tools/dialogsinglepoint.h
@@ -44,7 +44,7 @@ class DialogSinglePoint : public DialogTool
     Q_OBJECT
 public:
     DialogSinglePoint(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogSinglePoint();
+    virtual ~DialogSinglePoint();
 
     void           SetData(const QString &name, const QPointF &point);
     QPointF        GetPoint()const;
diff --git a/src/app/dialogs/tools/dialogspline.cpp b/src/app/dialogs/tools/dialogspline.cpp
index 297cd135d..924a5e759 100644
--- a/src/app/dialogs/tools/dialogspline.cpp
+++ b/src/app/dialogs/tools/dialogspline.cpp
@@ -42,7 +42,7 @@
  */
 DialogSpline::DialogSpline(const VContainer *data, const quint32 &toolId, QWidget *parent)
     :DialogTool(data, toolId, parent), ui(new Ui::DialogSpline), angle1(0), angle2(0), kAsm1(1), kAsm2(1),
-      kCurve(1), path(nullptr)
+      kCurve(1)
 {
     ui->setupUi(this);
     InitOkCancelApply(ui);
@@ -56,16 +56,13 @@ DialogSpline::DialogSpline(const VContainer *data, const quint32 &toolId, QWidge
     connect(ui->comboBoxP4, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogSpline::PointNameChanged);
 
-    path = new VisToolSpline(data);
+    vis = new VisToolSpline(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogSpline::~DialogSpline()
 {
-    if (qApp->getCurrentScene()->items().contains(path))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete path;
-    }
+    DeleteVisualization<VisToolSpline>();
     delete ui;
 }
 
@@ -91,6 +88,9 @@ void DialogSpline::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolSpline *path = qobject_cast<VisToolSpline *>(vis);
+            SCASSERT(path != nullptr);
+
             switch (number)
             {
                 case 0:
@@ -147,6 +147,9 @@ void DialogSpline::SaveData()
     kAsm2 = ui->doubleSpinBoxKasm2->value();
     kCurve = ui->doubleSpinBoxKcurve->value();
 
+    VisToolSpline *path = qobject_cast<VisToolSpline *>(vis);
+    SCASSERT(path != nullptr);
+
     path->setPoint1Id(GetP1());
     path->setPoint4Id(GetP4());
     path->SetAngle1(angle1);
@@ -183,14 +186,7 @@ void DialogSpline::PointNameChanged()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogSpline::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, path, &Visualization::SetFactor);
-        scene->addItem(path);
-        path->RefreshGeometry();
-    }
+    AddVisualization<VisToolSpline>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -202,6 +198,9 @@ void DialogSpline::SetKCurve(const qreal &value)
 {
     kCurve = value;
     ui->doubleSpinBoxKcurve->setValue(value);
+
+    VisToolSpline *path = qobject_cast<VisToolSpline *>(vis);
+    SCASSERT(path != nullptr);
     path->SetKCurve(kCurve);
 }
 
@@ -226,6 +225,9 @@ void DialogSpline::SetKAsm2(const qreal &value)
 {
     kAsm2 = value;
     ui->doubleSpinBoxKasm2->setValue(value);
+
+    VisToolSpline *path = qobject_cast<VisToolSpline *>(vis);
+    SCASSERT(path != nullptr);
     path->SetKAsm2(kAsm2);
 }
 
@@ -238,6 +240,9 @@ void DialogSpline::SetKAsm1(const qreal &value)
 {
     kAsm1 = value;
     ui->doubleSpinBoxKasm1->setValue(value);
+
+    VisToolSpline *path = qobject_cast<VisToolSpline *>(vis);
+    SCASSERT(path != nullptr);
     path->SetKAsm1(kAsm1);
 }
 
@@ -250,6 +255,9 @@ void DialogSpline::SetAngle2(const qreal &value)
 {
     angle2 = value;
     ui->spinBoxAngle2->setValue(static_cast<qint32>(value));
+
+    VisToolSpline *path = qobject_cast<VisToolSpline *>(vis);
+    SCASSERT(path != nullptr);
     path->SetAngle2(angle2);
 }
 
@@ -262,6 +270,9 @@ void DialogSpline::SetAngle1(const qreal &value)
 {
     angle1 = value;
     ui->spinBoxAngle1->setValue(static_cast<qint32>(value));
+
+    VisToolSpline *path = qobject_cast<VisToolSpline *>(vis);
+    SCASSERT(path != nullptr);
     path->SetAngle1(angle1);
 }
 
@@ -273,6 +284,9 @@ void DialogSpline::SetAngle1(const qreal &value)
 void DialogSpline::SetP4(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP4, value);
+
+    VisToolSpline *path = qobject_cast<VisToolSpline *>(vis);
+    SCASSERT(path != nullptr);
     path->setPoint4Id(value);
 }
 
@@ -284,6 +298,9 @@ void DialogSpline::SetP4(const quint32 &value)
 void DialogSpline::SetP1(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxP1, value);
+
+    VisToolSpline *path = qobject_cast<VisToolSpline *>(vis);
+    SCASSERT(path != nullptr);
     path->setPoint1Id(value);
 }
 
diff --git a/src/app/dialogs/tools/dialogspline.h b/src/app/dialogs/tools/dialogspline.h
index 0c65ee00e..09693f7af 100644
--- a/src/app/dialogs/tools/dialogspline.h
+++ b/src/app/dialogs/tools/dialogspline.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogSpline;
 }
 
-class VisToolSpline;
-
 /**
  * @brief The DialogSpline class dialog for ToolSpline. Help create spline and edit option.
  */
@@ -46,7 +44,7 @@ class DialogSpline : public DialogTool
     Q_OBJECT
 public:
     DialogSpline(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogSpline();
+    virtual ~DialogSpline();
 
     quint32       GetP1() const;
     void          SetP1(const quint32 &value);
@@ -100,8 +98,6 @@ private:
 
     /** @brief kCurve coefficient curve */
     qreal         kCurve;
-
-    VisToolSpline *path;
 };
 
 #endif // DIALOGSPLINE_H
diff --git a/src/app/dialogs/tools/dialogsplinepath.cpp b/src/app/dialogs/tools/dialogsplinepath.cpp
index d36870d10..2d0f01fe6 100644
--- a/src/app/dialogs/tools/dialogsplinepath.cpp
+++ b/src/app/dialogs/tools/dialogsplinepath.cpp
@@ -39,7 +39,7 @@
  * @param parent parent widget
  */
 DialogSplinePath::DialogSplinePath(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogSplinePath), path(VSplinePath()), visPath(nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogSplinePath), path(VSplinePath())
 {
     ui->setupUi(this);
     InitOkCancelApply(ui);
@@ -60,16 +60,13 @@ DialogSplinePath::DialogSplinePath(const VContainer *data, const quint32 &toolId
     connect(ui->doubleSpinBoxKasm2,  static_cast<void (QDoubleSpinBox::*)(double)>(&QDoubleSpinBox::valueChanged),
             this, &DialogSplinePath::KAsm2Changed);
 
-    visPath = new VisToolSplinePath(data);
+    vis = new VisToolSplinePath(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogSplinePath::~DialogSplinePath()
 {
-    if (qApp->getCurrentScene()->items().contains(visPath))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete visPath;
-    }
+    DeleteVisualization<VisToolSplinePath>();
     delete ui;
 }
 
@@ -90,6 +87,8 @@ void DialogSplinePath::SetPath(const VSplinePath &value)
     ui->listWidget->setFocus(Qt::OtherFocusReason);
     ui->doubleSpinBoxKcurve->setValue(path.GetKCurve());
 
+    VisToolSplinePath *visPath = qobject_cast<VisToolSplinePath *>(vis);
+    SCASSERT(visPath != nullptr);
     visPath->setPath(path);
     ui->listWidget->blockSignals(false);
 }
@@ -125,7 +124,11 @@ void DialogSplinePath::ChosenObject(quint32 id, const SceneObject &type)
         emit ToolTip(tr("Select point of curve path"));
 
         SavePath();
+
+        VisToolSplinePath *visPath = qobject_cast<VisToolSplinePath *>(vis);
+        SCASSERT(visPath != nullptr);
         visPath->setPath(path);
+
         if (path.CountPoint() == 1)
         {
             visPath->VisualMode(NULL_ID);
@@ -144,6 +147,8 @@ void DialogSplinePath::SaveData()
 {
     SavePath();
 
+    VisToolSplinePath *visPath = qobject_cast<VisToolSplinePath *>(vis);
+    SCASSERT(visPath != nullptr);
     visPath->setPath(path);
     visPath->RefreshGeometry();
 }
@@ -268,7 +273,11 @@ void DialogSplinePath::ShowVisualization()
     if (prepare == false)
     {
         VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
+        SCASSERT(scene != nullptr);
+
+        VisToolSplinePath *visPath = qobject_cast<VisToolSplinePath *>(vis);
+        SCASSERT(visPath != nullptr);
+
         connect(scene, &VMainGraphicsScene::NewFactor, visPath, &Visualization::SetFactor);
         scene->addItem(visPath);
         visPath->setMode(Mode::Show);
diff --git a/src/app/dialogs/tools/dialogsplinepath.h b/src/app/dialogs/tools/dialogsplinepath.h
index eae77a031..a19f1243a 100644
--- a/src/app/dialogs/tools/dialogsplinepath.h
+++ b/src/app/dialogs/tools/dialogsplinepath.h
@@ -37,8 +37,6 @@ namespace Ui
     class DialogSplinePath;
 }
 
-class VisToolSplinePath;
-
 /**
  * @brief The DialogSplinePath class dialog for ToolSplinePath. Help create spline path and edit option.
  */
@@ -47,7 +45,7 @@ class DialogSplinePath : public DialogTool
     Q_OBJECT
 public:
     DialogSplinePath(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogSplinePath();
+    virtual ~DialogSplinePath();
 
     VSplinePath        GetPath() const;
     void               SetPath(const VSplinePath &value);
@@ -79,8 +77,6 @@ private:
     /** @brief path spline path */
     VSplinePath        path;
 
-    VisToolSplinePath *visPath;
-
     void               NewItem(quint32 id, qreal kAsm1, qreal angle1, qreal kAsm2, qreal angle2);
     void               DataPoint(quint32 id, qreal kAsm1, qreal angle1, qreal kAsm2, qreal angle2);
     void               EnableFields();
diff --git a/src/app/dialogs/tools/dialogtool.cpp b/src/app/dialogs/tools/dialogtool.cpp
index 893e6e868..be3a446cf 100644
--- a/src/app/dialogs/tools/dialogtool.cpp
+++ b/src/app/dialogs/tools/dialogtool.cpp
@@ -62,7 +62,7 @@ DialogTool::DialogTool(const VContainer *data, const quint32 &toolId, QWidget *p
       timerFormula(nullptr), bOk(nullptr), bApply(nullptr), spinBoxAngle(nullptr), plainTextEditFormula(nullptr),
       labelResultCalculation(nullptr), labelEditNamePoint(nullptr), labelEditFormula(nullptr),
       okColor(QColor(76, 76, 76)), errorColor(Qt::red), associatedTool(nullptr),
-      toolId(toolId), prepare(false), pointName(QString()), number(0)
+      toolId(toolId), prepare(false), pointName(QString()), number(0), vis(nullptr)
 {
     SCASSERT(data != nullptr);
     timerFormula = new QTimer(this);
diff --git a/src/app/dialogs/tools/dialogtool.h b/src/app/dialogs/tools/dialogtool.h
index dd00c108a..54ce603e3 100644
--- a/src/app/dialogs/tools/dialogtool.h
+++ b/src/app/dialogs/tools/dialogtool.h
@@ -31,6 +31,8 @@
 
 #include "../../core/vapplication.h"
 #include "../../utils/logging.h"
+#include "../../widgets/vmaingraphicsscene.h"
+#include "../../visualization/visualization.h"
 
 #include <QDialog>
 #include <QDialogButtonBox>
@@ -177,6 +179,8 @@ protected:
     /** @brief number number of handled objects */
     qint32           number;
 
+    Visualization   *vis;
+
     virtual void     closeEvent ( QCloseEvent * event );
     virtual void     showEvent( QShowEvent *event );
 
@@ -261,6 +265,34 @@ protected:
         plainTextEditFormula = ui->plainTextEditFormula;
         labelEditFormula = ui->labelEditFormula;
     }
+    template <typename T>
+    void             AddVisualization()
+    {
+        if (prepare == false)
+        {
+            VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
+            SCASSERT(scene != nullptr);
+
+            T *toolVis = qobject_cast<T *>(vis);
+            SCASSERT(toolVis != nullptr);
+
+            connect(scene, &VMainGraphicsScene::NewFactor, toolVis, &Visualization::SetFactor);
+            scene->addItem(toolVis);
+            toolVis->RefreshGeometry();
+        }
+    }
+
+    template <typename T>
+    void             DeleteVisualization()
+    {
+        T *toolVis = qobject_cast<T *>(vis);
+        SCASSERT(toolVis != nullptr);
+
+        if (qApp->getCurrentScene()->items().contains(toolVis))
+        { // In some cases scene delete object yourself. If not make check program will crash.
+            delete vis;
+        }
+    }
 
     void             ChangeColor(QWidget *widget, const QColor &color);
     virtual void     ShowVisualization(){}
diff --git a/src/app/dialogs/tools/dialogtriangle.cpp b/src/app/dialogs/tools/dialogtriangle.cpp
index e765be0c7..063910511 100644
--- a/src/app/dialogs/tools/dialogtriangle.cpp
+++ b/src/app/dialogs/tools/dialogtriangle.cpp
@@ -41,7 +41,7 @@
  * @param parent parent widget
  */
 DialogTriangle::DialogTriangle(const VContainer *data, const quint32 &toolId, QWidget *parent)
-    :DialogTool(data, toolId, parent), ui(new Ui::DialogTriangle), line (nullptr)
+    :DialogTool(data, toolId, parent), ui(new Ui::DialogTriangle)
 {
     ui->setupUi(this);
     ui->lineEditNamePoint->setText(qApp->getCurrentDocument()->GenerateLabel(LabelType::NewLabel));
@@ -65,16 +65,13 @@ DialogTriangle::DialogTriangle(const VContainer *data, const quint32 &toolId, QW
     connect(ui->comboBoxAxisP2, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogTriangle::PointNameChanged);
 
-    line = new VisToolTriangle(data);
+    vis = new VisToolTriangle(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogTriangle::~DialogTriangle()
 {
-    if (qApp->getCurrentScene()->items().contains(line))
-    { // In some cases scene delete object yourself. If not make check program will crash.
-        delete line;
-    }
+    DeleteVisualization<VisToolTriangle>();
     delete ui;
 }
 
@@ -90,6 +87,9 @@ void DialogTriangle::ChosenObject(quint32 id, const SceneObject &type)
     {
         if (type == SceneObject::Point)
         {
+            VisToolTriangle *line = qobject_cast<VisToolTriangle *>(vis);
+            SCASSERT(line != nullptr);
+
             switch (number)
             {
                 case (0):
@@ -161,6 +161,9 @@ void DialogTriangle::SaveData()
 {
     pointName = ui->lineEditNamePoint->text();
 
+    VisToolTriangle *line = qobject_cast<VisToolTriangle *>(vis);
+    SCASSERT(line != nullptr);
+
     line->setPoint1Id(GetAxisP1Id());
     line->setPoint2Id(GetAxisP2Id());
     line->setHypotenuseP1Id(GetFirstPointId());
@@ -198,14 +201,7 @@ void DialogTriangle::PointNameChanged()
 //---------------------------------------------------------------------------------------------------------------------
 void DialogTriangle::ShowVisualization()
 {
-    if (prepare == false)
-    {
-        VMainGraphicsScene *scene = qobject_cast<VMainGraphicsScene *>(qApp->getCurrentScene());
-        SCASSERT(scene != nullptr)
-        connect(scene, &VMainGraphicsScene::NewFactor, line, &VisLine::SetFactor);
-        scene->addItem(line);
-        line->RefreshGeometry();
-    }
+    AddVisualization<VisToolTriangle>();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -227,6 +223,9 @@ void DialogTriangle::SetPointName(const QString &value)
 void DialogTriangle::SetSecondPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxSecondPoint, value);
+
+    VisToolTriangle *line = qobject_cast<VisToolTriangle *>(vis);
+    SCASSERT(line != nullptr);
     line->setHypotenuseP2Id(value);
 }
 
@@ -238,6 +237,9 @@ void DialogTriangle::SetSecondPointId(const quint32 &value)
 void DialogTriangle::SetFirstPointId(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxFirstPoint, value);
+
+    VisToolTriangle *line = qobject_cast<VisToolTriangle *>(vis);
+    SCASSERT(line != nullptr);
     line->setHypotenuseP1Id(value);
 }
 
@@ -249,6 +251,9 @@ void DialogTriangle::SetFirstPointId(const quint32 &value)
 void DialogTriangle::SetAxisP2Id(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxAxisP2, value);
+
+    VisToolTriangle *line = qobject_cast<VisToolTriangle *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint2Id(value);
 }
 
@@ -260,6 +265,9 @@ void DialogTriangle::SetAxisP2Id(const quint32 &value)
 void DialogTriangle::SetAxisP1Id(const quint32 &value)
 {
     setCurrentPointId(ui->comboBoxAxisP1, value);
+
+    VisToolTriangle *line = qobject_cast<VisToolTriangle *>(vis);
+    SCASSERT(line != nullptr);
     line->setPoint1Id(value);
 }
 
diff --git a/src/app/dialogs/tools/dialogtriangle.h b/src/app/dialogs/tools/dialogtriangle.h
index 5a76914b4..d9e11357b 100644
--- a/src/app/dialogs/tools/dialogtriangle.h
+++ b/src/app/dialogs/tools/dialogtriangle.h
@@ -36,8 +36,6 @@ namespace Ui
     class DialogTriangle;
 }
 
-class VisToolTriangle;
-
 /**
  * @brief The DialogTriangle class dialog for ToolTriangle. Help create point and edit option.
  */
@@ -46,7 +44,7 @@ class DialogTriangle : public DialogTool
     Q_OBJECT
 public:
     DialogTriangle(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogTriangle();
+    virtual ~DialogTriangle();
 
     quint32        GetAxisP1Id() const;
     void           SetAxisP1Id(const quint32 &value);
@@ -75,8 +73,6 @@ private:
 
     /** @brief ui keeps information about user interface */
     Ui::DialogTriangle *ui;
-
-    VisToolTriangle *line;
 };
 
 #endif // DIALOGTRIANGLE_H
diff --git a/src/app/dialogs/tools/dialoguniondetails.h b/src/app/dialogs/tools/dialoguniondetails.h
index 5500a72b4..5a556ff72 100644
--- a/src/app/dialogs/tools/dialoguniondetails.h
+++ b/src/app/dialogs/tools/dialoguniondetails.h
@@ -44,7 +44,7 @@ class DialogUnionDetails : public DialogTool
     Q_OBJECT
 public:
     DialogUnionDetails(const VContainer *data, const quint32 &toolId, QWidget *parent = nullptr);
-    ~DialogUnionDetails();
+    virtual ~DialogUnionDetails();
 
     quint32          getD1() const;
     quint32          getD2() const;