diff --git a/src/app/dialogs/tools/dialogspline.cpp b/src/app/dialogs/tools/dialogspline.cpp
index 07351826c..8654c7557 100644
--- a/src/app/dialogs/tools/dialogspline.cpp
+++ b/src/app/dialogs/tools/dialogspline.cpp
@@ -31,6 +31,7 @@
 
 #include "../../geometry/vpointf.h"
 #include "../../container/vcontainer.h"
+#include "../../visualization/vistoolspline.h"
 
 //---------------------------------------------------------------------------------------------------------------------
 /**
@@ -40,10 +41,10 @@
  */
 DialogSpline::DialogSpline(const VContainer *data, const quint32 &toolId, QWidget *parent)
     :DialogTool(data, toolId, parent), ui(new Ui::DialogSpline), number(0), p1(NULL_ID), p4(NULL_ID), angle1(0),
-      angle2(0), kAsm1(1), kAsm2(1), kCurve(1)
+      angle2(0), kAsm1(1), kAsm2(1), kCurve(1), path(nullptr)
 {
     ui->setupUi(this);
-    InitOkCancel(ui);
+    InitOkCancelApply(ui);
 
     FillComboBoxPoints(ui->comboBoxP1);
     FillComboBoxPoints(ui->comboBoxP4);
@@ -51,11 +52,14 @@ DialogSpline::DialogSpline(const VContainer *data, const quint32 &toolId, QWidge
             this, &DialogSpline::PointNameChanged);
     connect(ui->comboBoxP4, static_cast<void (QComboBox::*)(const QString &)>(&QComboBox::currentIndexChanged),
             this, &DialogSpline::PointNameChanged);
+
+    path = new VisToolSpline(data);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
 DialogSpline::~DialogSpline()
 {
+    delete path;
     delete ui;
 }
 
@@ -77,44 +81,50 @@ quint32 DialogSpline::getP1() const
  */
 void DialogSpline::ChosenObject(quint32 id, const SceneObject &type)
 {
-    if (type == SceneObject::Point)
+    if (prepare == false)// After first choose we ignore all objects
     {
-        switch (number)
+        if (type == SceneObject::Point)
         {
-            case 0:
-                if (SetObject(id, ui->comboBoxP1, tr("Select last point of curve")))
-                {
-                    number++;
-                }
-                break;
-            case 1:
+            switch (number)
             {
-                const VPointF *point = data->GeometricObject<const VPointF *>(id);
-                qint32 index = ui->comboBoxP4->findText(point->name());
-                if ( index != -1 )
-                { // -1 for not found
-                    ui->comboBoxP4->setCurrentIndex(index);
-                    emit ToolTip("");
-                    index = ui->comboBoxP1->currentIndex();
-                    quint32 p1Id = qvariant_cast<quint32>(ui->comboBoxP1->itemData(index));
-
-                    QPointF p1 = data->GeometricObject<const VPointF *>(p1Id)->toQPointF();
-                    QPointF p4 = data->GeometricObject<const VPointF *>(id)->toQPointF();
-
-                    ui->spinBoxAngle1->setValue(static_cast<qint32>(QLineF(p1, p4).angle()));
-                    ui->spinBoxAngle2->setValue(static_cast<qint32>(QLineF(p4, p1).angle()));
-
-                    this->setModal(true);
-                    this->show();
-                }
-                else
+                case 0:
+                    if (SetObject(id, ui->comboBoxP1, tr("Select last point of curve")))
+                    {
+                        number++;
+                        path->VisualMode(id);
+                    }
+                    break;
+                case 1:
                 {
-                    qWarning()<<"Can't find object by name"<<point->name();
+                    const VPointF *point = data->GeometricObject<const VPointF *>(id);
+                    qint32 index = ui->comboBoxP4->findText(point->name());
+                    if ( index != -1 )
+                    { // -1 for not found
+                        ui->comboBoxP4->setCurrentIndex(index);
+                        emit ToolTip("");
+                        index = ui->comboBoxP1->currentIndex();
+                        quint32 p1Id = qvariant_cast<quint32>(ui->comboBoxP1->itemData(index));
+
+                        QPointF p1 = data->GeometricObject<const VPointF *>(p1Id)->toQPointF();
+                        QPointF p4 = data->GeometricObject<const VPointF *>(id)->toQPointF();
+
+                        ui->spinBoxAngle1->setValue(static_cast<qint32>(QLineF(p1, p4).angle()));
+                        ui->spinBoxAngle2->setValue(static_cast<qint32>(QLineF(p4, p1).angle()));
+
+                        path->setPoint4Id(id);
+                        path->RefreshGeometry();
+                        prepare = true;
+                        DialogAccepted();
+                    }
+                    else
+                    {
+                        qWarning()<<"Can't find object by name"<<point->name();
+                    }
+                    break;
                 }
-                break;
+                default:
+                    break;
             }
-            default:
-                break;
         }
     }
 }
@@ -129,6 +139,15 @@ void DialogSpline::SaveData()
     kAsm1 = ui->doubleSpinBoxKasm1->value();
     kAsm2 = ui->doubleSpinBoxKasm2->value();
     kCurve = ui->doubleSpinBoxKcurve->value();
+
+    path->setPoint1Id(p1);
+    path->setPoint4Id(p4);
+    path->setAngle1(angle1);
+    path->setAngle2(angle2);
+    path->setKAsm1(kAsm1);
+    path->setKAsm2(kAsm2);
+    path->setKCurve(kCurve);
+    path->RefreshGeometry();
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -163,6 +182,18 @@ void DialogSpline::UpdateList()
      */
 }
 
+//---------------------------------------------------------------------------------------------------------------------
+void DialogSpline::ShowVisualization()
+{
+    if (prepare == false)
+    {
+        VMainGraphicsScene *scene = qApp->getCurrentScene();
+        connect(scene, &VMainGraphicsScene::NewFactor, path, &Visualization::SetFactor);
+        scene->addItem(path);
+        path->RefreshGeometry();
+    }
+}
+
 //---------------------------------------------------------------------------------------------------------------------
 /**
  * @brief setKCurve set coefficient curve
@@ -172,6 +203,7 @@ void DialogSpline::setKCurve(const qreal &value)
 {
     kCurve = value;
     ui->doubleSpinBoxKcurve->setValue(value);
+    path->setKCurve(kCurve);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -183,6 +215,7 @@ void DialogSpline::setKAsm2(const qreal &value)
 {
     kAsm2 = value;
     ui->doubleSpinBoxKasm2->setValue(value);
+    path->setKAsm2(kAsm2);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -194,6 +227,7 @@ void DialogSpline::setKAsm1(const qreal &value)
 {
     kAsm1 = value;
     ui->doubleSpinBoxKasm1->setValue(value);
+    path->setKAsm1(kAsm1);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -205,6 +239,7 @@ void DialogSpline::setAngle2(const qreal &value)
 {
     angle2 = value;
     ui->spinBoxAngle2->setValue(static_cast<qint32>(value));
+    path->setAngle2(angle2);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -216,6 +251,7 @@ void DialogSpline::setAngle1(const qreal &value)
 {
     angle1 = value;
     ui->spinBoxAngle1->setValue(static_cast<qint32>(value));
+    path->setAngle1(angle1);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -226,6 +262,7 @@ void DialogSpline::setAngle1(const qreal &value)
 void DialogSpline::setP4(const quint32 &value)
 {
     setPointId(ui->comboBoxP4, p4, value);
+    path->setPoint4Id(p4);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -236,6 +273,7 @@ void DialogSpline::setP4(const quint32 &value)
 void DialogSpline::setP1(const quint32 &value)
 {
     setPointId(ui->comboBoxP1, p1, value);
+    path->setPoint1Id(p1);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogspline.h b/src/app/dialogs/tools/dialogspline.h
index d288d7615..20d97f396 100644
--- a/src/app/dialogs/tools/dialogspline.h
+++ b/src/app/dialogs/tools/dialogspline.h
@@ -36,6 +36,8 @@ namespace Ui
     class DialogSpline;
 }
 
+class VisToolSpline;
+
 /**
  * @brief The DialogSpline class dialog for ToolSpline. Help create spline and edit option.
  */
@@ -71,6 +73,7 @@ public slots:
     virtual void  PointNameChanged();
     virtual void  UpdateList();
 protected:
+    virtual void  ShowVisualization();
     /**
      * @brief SaveData Put dialog data in local variables
      */
@@ -104,6 +107,8 @@ private:
 
     /** @brief kCurve coefficient curve */
     qreal         kCurve;
+
+    VisToolSpline *path;
 };
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/dialogs/tools/dialogspline.ui b/src/app/dialogs/tools/dialogspline.ui
index 721ffae3b..f8bda5f49 100644
--- a/src/app/dialogs/tools/dialogspline.ui
+++ b/src/app/dialogs/tools/dialogspline.ui
@@ -202,7 +202,7 @@
       <enum>Qt::Horizontal</enum>
      </property>
      <property name="standardButtons">
-      <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+      <set>QDialogButtonBox::Apply|QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
      </property>
     </widget>
    </item>
diff --git a/src/app/mainwindow.cpp b/src/app/mainwindow.cpp
index 4ee42633a..8c4ecbb83 100644
--- a/src/app/mainwindow.cpp
+++ b/src/app/mainwindow.cpp
@@ -473,8 +473,10 @@ void MainWindow::ToolLineIntersect(bool checked)
  */
 void MainWindow::ToolSpline(bool checked)
 {
-    SetToolButton<DialogSpline>(checked, Tool::SplineTool, ":/cursor/spline_cursor.png",
-                                tr("Select first point curve"), &MainWindow::ClosedDialog<VToolSpline>);
+    SetToolButtonWithApply<DialogSpline>(checked, Tool::SplineTool, ":/cursor/spline_cursor.png",
+                                         tr("Select first point curve"),
+                                         &MainWindow::ClosedDialogWithApply<VToolSpline>,
+                                         &MainWindow::ApplyDialog<VToolSpline>);
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/tools/drawTools/vtoolspline.cpp b/src/app/tools/drawTools/vtoolspline.cpp
index 1488c72cb..4b4e312c0 100644
--- a/src/app/tools/drawTools/vtoolspline.cpp
+++ b/src/app/tools/drawTools/vtoolspline.cpp
@@ -107,8 +107,9 @@ void VToolSpline::setDialog()
  * @param scene pointer to scene.
  * @param doc dom document container.
  * @param data container with variables.
+ * @return the created tool
  */
-void VToolSpline::Create(DialogTool *dialog, VMainGraphicsScene *scene, VPattern *doc, VContainer *data)
+VToolSpline* VToolSpline::Create(DialogTool *dialog, VMainGraphicsScene *scene, VPattern *doc, VContainer *data)
 {
     SCASSERT(dialog != nullptr);
     DialogSpline *dialogTool = qobject_cast<DialogSpline*>(dialog);
@@ -120,8 +121,14 @@ void VToolSpline::Create(DialogTool *dialog, VMainGraphicsScene *scene, VPattern
     const qreal angle1 = dialogTool->getAngle1();
     const qreal angle2 = dialogTool->getAngle2();
     const qreal kCurve = dialogTool->getKCurve();
-    Create(0, p1, p4, kAsm1, kAsm2, angle1, angle2, kCurve, scene, doc, data, Document::FullParse,
-           Source::FromGui);
+    VToolSpline *spl = nullptr;
+    spl = Create(0, p1, p4, kAsm1, kAsm2, angle1, angle2, kCurve, scene, doc, data, Document::FullParse,
+                 Source::FromGui);
+    if (spl != nullptr)
+    {
+        spl->dialog=dialogTool;
+    }
+    return spl;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
@@ -140,11 +147,12 @@ void VToolSpline::Create(DialogTool *dialog, VMainGraphicsScene *scene, VPattern
  * @param data container with variables.
  * @param parse parser file mode.
  * @param typeCreation way we create this tool.
+ * @return the created tool
  */
-void VToolSpline::Create(const quint32 _id, const quint32 &p1, const quint32 &p4, const qreal &kAsm1,
-                         const qreal kAsm2, const qreal &angle1, const qreal &angle2, const qreal &kCurve,
-                         VMainGraphicsScene *scene, VPattern *doc, VContainer *data,
-                         const Document &parse, const Source &typeCreation)
+VToolSpline* VToolSpline::Create(const quint32 _id, const quint32 &p1, const quint32 &p4, const qreal &kAsm1,
+                                 const qreal kAsm2, const qreal &angle1, const qreal &angle2, const qreal &kCurve,
+                                 VMainGraphicsScene *scene, VPattern *doc, VContainer *data,
+                                 const Document &parse, const Source &typeCreation)
 {
     VPointF point1 = *data->GeometricObject<const VPointF *>(p1);
     VPointF point4 = *data->GeometricObject<const VPointF *>(p4);
@@ -175,7 +183,9 @@ void VToolSpline::Create(const quint32 _id, const quint32 &p1, const quint32 &p4
         doc->AddTool(id, spl);
         doc->IncrementReferens(p1);
         doc->IncrementReferens(p4);
+        return spl;
     }
+    return nullptr;
 }
 
 //---------------------------------------------------------------------------------------------------------------------
diff --git a/src/app/tools/drawTools/vtoolspline.h b/src/app/tools/drawTools/vtoolspline.h
index 7d1490c66..153d4f917 100644
--- a/src/app/tools/drawTools/vtoolspline.h
+++ b/src/app/tools/drawTools/vtoolspline.h
@@ -42,11 +42,11 @@ public:
                  VToolSpline (VPattern *doc, VContainer *data, quint32 id, const Source &typeCreation,
                               QGraphicsItem * parent = nullptr );
     virtual void setDialog();
-    static void  Create(DialogTool *dialog, VMainGraphicsScene  *scene, VPattern *doc, VContainer *data);
-    static void  Create(const quint32 _id, const quint32 &p1, const quint32 &p4, const qreal &kAsm1,
-                        const qreal kAsm2, const qreal &angle1, const qreal &angle2, const qreal &kCurve,
-                        VMainGraphicsScene  *scene, VPattern *doc, VContainer *data,
-                        const Document &parse, const Source &typeCreation);
+    static VToolSpline *Create(DialogTool *dialog, VMainGraphicsScene  *scene, VPattern *doc, VContainer *data);
+    static VToolSpline *Create(const quint32 _id, const quint32 &p1, const quint32 &p4, const qreal &kAsm1,
+                               const qreal kAsm2, const qreal &angle1, const qreal &angle2, const qreal &kCurve,
+                               VMainGraphicsScene  *scene, VPattern *doc, VContainer *data,
+                               const Document &parse, const Source &typeCreation);
     static const QString ToolType;
 public slots:
     void         ControlPointChangePosition (const qint32 &indexSpline, const SplinePointPosition &position,
diff --git a/src/app/visualization/visline.cpp b/src/app/visualization/visline.cpp
index f9e20fda0..e1e113cd3 100644
--- a/src/app/visualization/visline.cpp
+++ b/src/app/visualization/visline.cpp
@@ -41,15 +41,6 @@ VisLine::VisLine(const VContainer *data, QGraphicsItem *parent)
 VisLine::~VisLine()
 {}
 
-//---------------------------------------------------------------------------------------------------------------------
-void VisLine::DrawLine(QGraphicsLineItem *lineItem, const QLineF &line, const QColor &color, Qt::PenStyle style)
-{
-    SCASSERT (lineItem != nullptr);
-
-    lineItem->setPen(QPen(color, qApp->toPixel(qApp->widthHairLine())/factor, style));
-    lineItem->setLine(line);
-}
-
 //---------------------------------------------------------------------------------------------------------------------
 QLineF VisLine::Line(const QPointF &p1, const qreal &length, const qreal &angle)
 {
diff --git a/src/app/visualization/visline.h b/src/app/visualization/visline.h
index b271d6b87..ec7933a1f 100644
--- a/src/app/visualization/visline.h
+++ b/src/app/visualization/visline.h
@@ -43,8 +43,6 @@ public:
     virtual ~VisLine();
 
 protected:
-    void         DrawLine(QGraphicsLineItem *lineItem, const QLineF &line, const QColor &color,
-                          Qt::PenStyle style = Qt::SolidLine);
     QLineF       Line(const QPointF &p1, const qreal& length, const qreal &angle);
     qreal        CorrectAngle(const qreal &angle) const;
     QPointF      Ray(const QPointF &firstPoint, const qreal &angle) const;
diff --git a/src/app/visualization/vistoolspline.cpp b/src/app/visualization/vistoolspline.cpp
new file mode 100644
index 000000000..4cf8c4f09
--- /dev/null
+++ b/src/app/visualization/vistoolspline.cpp
@@ -0,0 +1,119 @@
+/************************************************************************
+ **
+ **  @file   vistoolspline.cpp
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   18 8, 2014
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentine project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2014 Valentina project
+ **  <https://bitbucket.org/dismine/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+
+#include "vistoolspline.h"
+#include "../geometry/vpointf.h"
+#include "../geometry/vspline.h"
+#include "../container/vcontainer.h"
+
+const int EMPTY_ANGLE = -1;
+
+//---------------------------------------------------------------------------------------------------------------------
+VisToolSpline::VisToolSpline(const VContainer *data, QGraphicsItem *parent)
+    : VisPath(data, parent), point4Id(NULL_ID), lineP1(nullptr), lineP4(nullptr), line(nullptr), angle1(EMPTY_ANGLE),
+      angle2(EMPTY_ANGLE), kAsm1(1), kAsm2(1), kCurve(1)
+{
+    lineP1 = InitPoint(supportColor, this);
+    lineP4 = InitPoint(supportColor, this);
+    line = InitItem<QGraphicsLineItem>(mainColor, this);
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+VisToolSpline::~VisToolSpline()
+{}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolSpline::RefreshGeometry()
+{
+    if (point1Id > 0)
+    {
+        const VPointF *first = Visualization::data->GeometricObject<const VPointF *>(point1Id);
+        DrawPoint(lineP1, first->toQPointF(), supportColor);
+
+        if (point4Id <= 0)
+        {
+            DrawLine(line, QLineF(first->toQPointF(), Visualization::scenePos), mainColor);
+        }
+        else
+        {
+            const VPointF *second = Visualization::data->GeometricObject<const VPointF *>(point4Id);
+            DrawPoint(lineP4, second->toQPointF(), supportColor);
+
+            if (qFuzzyCompare(angle1, EMPTY_ANGLE) || qFuzzyCompare(angle2, EMPTY_ANGLE))
+            {
+                DrawLine(line, QLineF(first->toQPointF(), second->toQPointF()), mainColor);
+            }
+            else
+            {
+                VSpline spline(*first, *second, angle1, angle2, kAsm1, kAsm2, kCurve);
+                DrawPath(this, spline.GetPath(PathDirection::Show), mainColor, Qt::SolidLine, Qt::RoundCap);
+            }
+        }
+    }
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolSpline::setPoint4Id(const quint32 &value)
+{
+    point4Id = value;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolSpline::setAngle1(const qreal &value)
+{
+    angle1 = value;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolSpline::setAngle2(const qreal &value)
+{
+    angle2 = value;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolSpline::setKAsm1(const qreal &value)
+{
+    kAsm1 = value;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolSpline::setKAsm2(const qreal &value)
+{
+    kAsm2 = value;
+}
+
+//---------------------------------------------------------------------------------------------------------------------
+void VisToolSpline::setKCurve(const qreal &value)
+{
+    kCurve = value;
+}
+
+
+
+
+
diff --git a/src/app/visualization/vistoolspline.h b/src/app/visualization/vistoolspline.h
new file mode 100644
index 000000000..1a2c9f9f9
--- /dev/null
+++ b/src/app/visualization/vistoolspline.h
@@ -0,0 +1,62 @@
+/************************************************************************
+ **
+ **  @file   vistoolspline.h
+ **  @author Roman Telezhynskyi <dismine(at)gmail.com>
+ **  @date   18 8, 2014
+ **
+ **  @brief
+ **  @copyright
+ **  This source code is part of the Valentine project, a pattern making
+ **  program, whose allow create and modeling patterns of clothing.
+ **  Copyright (C) 2014 Valentina project
+ **  <https://bitbucket.org/dismine/valentina> All Rights Reserved.
+ **
+ **  Valentina is free software: you can redistribute it and/or modify
+ **  it under the terms of the GNU General Public License as published by
+ **  the Free Software Foundation, either version 3 of the License, or
+ **  (at your option) any later version.
+ **
+ **  Valentina is distributed in the hope that it will be useful,
+ **  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ **  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ **  GNU General Public License for more details.
+ **
+ **  You should have received a copy of the GNU General Public License
+ **  along with Valentina.  If not, see <http://www.gnu.org/licenses/>.
+ **
+ *************************************************************************/
+
+#ifndef VISTOOLSPLINE_H
+#define VISTOOLSPLINE_H
+
+#include "vispath.h"
+
+class VisToolSpline : public VisPath
+{
+    Q_OBJECT
+public:
+    VisToolSpline(const VContainer *data, QGraphicsItem *parent = 0);
+    virtual ~VisToolSpline();
+
+    virtual void RefreshGeometry();
+
+    void         setPoint4Id(const quint32 &value);
+    void         setAngle1(const qreal &value);
+    void         setAngle2(const qreal &value);
+    void         setKAsm1(const qreal &value);
+    void         setKAsm2(const qreal &value);
+    void         setKCurve(const qreal &value);
+protected:
+    Q_DISABLE_COPY(VisToolSpline)
+    quint32              point4Id;
+    QGraphicsEllipseItem *lineP1;
+    QGraphicsEllipseItem *lineP4;
+    QGraphicsLineItem    *line;
+    qreal                angle1;
+    qreal                angle2;
+    qreal                kAsm1;
+    qreal                kAsm2;
+    qreal                kCurve;
+};
+
+#endif // VISTOOLSPLINE_H
diff --git a/src/app/visualization/visualization.cpp b/src/app/visualization/visualization.cpp
index e548df081..914d8ba06 100644
--- a/src/app/visualization/visualization.cpp
+++ b/src/app/visualization/visualization.cpp
@@ -168,3 +168,12 @@ void Visualization::DrawPoint(QGraphicsEllipseItem *point, const QPointF &pos, c
     point->setPen(QPen(color, qApp->toPixel(qApp->widthMainLine())/factor, style));
     point->setVisible(true);
 }
+
+//---------------------------------------------------------------------------------------------------------------------
+void Visualization::DrawLine(QGraphicsLineItem *lineItem, const QLineF &line, const QColor &color, Qt::PenStyle style)
+{
+    SCASSERT (lineItem != nullptr);
+
+    lineItem->setPen(QPen(color, qApp->toPixel(qApp->widthHairLine())/factor, style));
+    lineItem->setLine(line);
+}
diff --git a/src/app/visualization/visualization.h b/src/app/visualization/visualization.h
index db0968c14..835e46f56 100644
--- a/src/app/visualization/visualization.h
+++ b/src/app/visualization/visualization.h
@@ -73,6 +73,8 @@ protected:
     qreal        FindVal(const QString &expression);
     void         DrawPoint(QGraphicsEllipseItem *point, const QPointF &pos, const QColor &color,
                            Qt::PenStyle style = Qt::SolidLine);
+    void         DrawLine(QGraphicsLineItem *lineItem, const QLineF &line, const QColor &color,
+                          Qt::PenStyle style = Qt::SolidLine);
 
     template <typename Item>
     void         AddItem(Item *item)
diff --git a/src/app/visualization/visualization.pri b/src/app/visualization/visualization.pri
index 5fe9225ef..b3397108a 100644
--- a/src/app/visualization/visualization.pri
+++ b/src/app/visualization/visualization.pri
@@ -18,7 +18,8 @@ HEADERS += \
     visualization/visualization.h \
     visualization/vistoolarc.h \
     visualization/vispath.h \
-    visualization/vistoolcutarc.h
+    visualization/vistoolcutarc.h \
+    visualization/vistoolspline.h
 
 SOURCES += \
     visualization/vgraphicssimpletextitem.cpp \
@@ -40,4 +41,5 @@ SOURCES += \
     visualization/visualization.cpp \
     visualization/vistoolarc.cpp \
     visualization/vispath.cpp \
-    visualization/vistoolcutarc.cpp
+    visualization/vistoolcutarc.cpp \
+    visualization/vistoolspline.cpp