diff --git a/application/application.pro b/application/application.pro
index 810d07b0..d335d860 100644
--- a/application/application.pro
+++ b/application/application.pro
@@ -180,6 +180,14 @@ HEADERS += sources/preferences.h
 SOURCES += sources/preferences.cc
 HEADERS += sources/preview_grid_view.h
 SOURCES += sources/preview_grid_view.cc
+HEADERS += sources/skeleton_graphics_edge_item.h
+SOURCES += sources/skeleton_graphics_edge_item.cc
+HEADERS += sources/skeleton_graphics_node_item.h
+SOURCES += sources/skeleton_graphics_node_item.cc
+HEADERS += sources/skeleton_graphics_origin_item.h
+SOURCES += sources/skeleton_graphics_origin_item.cc
+HEADERS += sources/skeleton_graphics_selection_item.h
+SOURCES += sources/skeleton_graphics_selection_item.cc
 HEADERS += sources/skeleton_graphics_widget.h
 SOURCES += sources/skeleton_graphics_widget.cc
 HEADERS += sources/skeleton_ik_mover.h
diff --git a/application/sources/skeleton_graphics_edge_item.cc b/application/sources/skeleton_graphics_edge_item.cc
new file mode 100644
index 00000000..a7f4e1cf
--- /dev/null
+++ b/application/sources/skeleton_graphics_edge_item.cc
@@ -0,0 +1,132 @@
+#include "skeleton_graphics_edge_item.h"
+#include "skeleton_graphics_node_item.h"
+#include "theme.h"
+
+SkeletonGraphicsEdgeItem::SkeletonGraphicsEdgeItem()
+    : m_firstItem(nullptr)
+    , m_secondItem(nullptr)
+    , m_hovered(false)
+    , m_checked(false)
+    , m_profile(Document::Profile::Unknown)
+    , m_deactivated(false)
+    , m_rotated(false)
+{
+    setData(0, "edge");
+}
+
+void SkeletonGraphicsEdgeItem::setRotated(bool rotated)
+{
+    m_rotated = rotated;
+}
+
+void SkeletonGraphicsEdgeItem::setEndpoints(SkeletonGraphicsNodeItem* first, SkeletonGraphicsNodeItem* second)
+{
+    m_firstItem = first;
+    m_secondItem = second;
+    updateAppearance();
+}
+
+SkeletonGraphicsNodeItem* SkeletonGraphicsEdgeItem::firstItem()
+{
+    return m_firstItem;
+}
+
+SkeletonGraphicsNodeItem* SkeletonGraphicsEdgeItem::secondItem()
+{
+    return m_secondItem;
+}
+
+void SkeletonGraphicsEdgeItem::updateAppearance()
+{
+    if (nullptr == m_firstItem || nullptr == m_secondItem)
+        return;
+
+    m_profile = m_firstItem->profile();
+
+    QLineF line(m_firstItem->origin(), m_secondItem->origin());
+
+    QPolygonF polygon;
+    float radAngle = line.angle() * M_PI / 180;
+    float dx = 2 * sin(radAngle);
+    float dy = 2 * cos(radAngle);
+    QPointF offset1 = QPointF(dx, dy);
+    QPointF offset2 = QPointF(-dx, -dy);
+    //polygon << line.p1() + offset1 << line.p1() + offset2 << line.p2() + offset2 << line.p2() + offset1;
+    polygon << line.p1() + offset1 << line.p1() + offset2 << line.p2();
+    setPolygon(polygon);
+
+    QColor color = Qt::gray;
+
+    if (!m_deactivated) {
+        switch (m_firstItem->profile()) {
+        case Document::Profile::Unknown:
+            break;
+        case Document::Profile::Main:
+            color = m_rotated ? Theme::blue : Theme::red;
+            break;
+        case Document::Profile::Side:
+            color = Theme::green;
+            break;
+        }
+    }
+
+    QColor penColor = color;
+    penColor.setAlphaF((m_checked || m_hovered) ? Theme::checkedAlpha : Theme::normalAlpha);
+    QPen pen(penColor);
+    pen.setWidth(0);
+    setPen(pen);
+}
+
+dust3d::Uuid SkeletonGraphicsEdgeItem::id()
+{
+    return m_uuid;
+}
+
+void SkeletonGraphicsEdgeItem::setId(dust3d::Uuid id)
+{
+    m_uuid = id;
+}
+
+Document::Profile SkeletonGraphicsEdgeItem::profile()
+{
+    return m_profile;
+}
+
+void SkeletonGraphicsEdgeItem::setHovered(bool hovered)
+{
+    m_hovered = hovered;
+    updateAppearance();
+}
+
+void SkeletonGraphicsEdgeItem::setChecked(bool checked)
+{
+    m_checked = checked;
+    updateAppearance();
+}
+
+void SkeletonGraphicsEdgeItem::setDeactivated(bool deactivated)
+{
+    m_deactivated = deactivated;
+    updateAppearance();
+}
+
+void SkeletonGraphicsEdgeItem::reverse()
+{
+    std::swap(m_firstItem, m_secondItem);
+    updateAppearance();
+}
+
+bool SkeletonGraphicsEdgeItem::deactivated()
+{
+    return m_deactivated;
+}
+
+bool SkeletonGraphicsEdgeItem::checked()
+{
+    return m_checked;
+}
+
+bool SkeletonGraphicsEdgeItem::hovered()
+{
+    return m_hovered;
+}
\ No newline at end of file
diff --git a/application/sources/skeleton_graphics_edge_item.h b/application/sources/skeleton_graphics_edge_item.h
new file mode 100644
index 00000000..0f7f87b2
--- /dev/null
+++ b/application/sources/skeleton_graphics_edge_item.h
@@ -0,0 +1,40 @@
+#ifndef DUST3D_APPLICATION_SKELETON_GRAPHICS_EDGE_ITEM_H_
+#define DUST3D_APPLICATION_SKELETON_GRAPHICS_EDGE_ITEM_H_
+
+#include "document.h"
+#include <QGraphicsPolygonItem>
+
+class SkeletonGraphicsNodeItem;
+
+class SkeletonGraphicsEdgeItem : public QGraphicsPolygonItem {
+public:
+    SkeletonGraphicsEdgeItem();
+    void setRotated(bool rotated);
+    void setEndpoints(SkeletonGraphicsNodeItem* first, SkeletonGraphicsNodeItem* second);
+    SkeletonGraphicsNodeItem* firstItem();
+    SkeletonGraphicsNodeItem* secondItem();
+    void updateAppearance();
+    dust3d::Uuid id();
+    void setId(dust3d::Uuid id);
+    Document::Profile profile();
+    void setHovered(bool hovered);
+    void setChecked(bool checked);
+    void setDeactivated(bool deactivated);
+    void reverse();
+    bool deactivated();
+    bool checked();
+    bool hovered();
+
+private:
+    dust3d::Uuid m_uuid;
+    SkeletonGraphicsNodeItem* m_firstItem;
+    SkeletonGraphicsNodeItem* m_secondItem;
+    QPolygonF m_selectionPolygon;
+    bool m_hovered = false;
+    bool m_checked = false;
+    Document::Profile m_profile = Document::Profile::Unknown;
+    bool m_deactivated = false;
+    bool m_rotated = false;
+};
+
+#endif
diff --git a/application/sources/skeleton_graphics_node_item.cc b/application/sources/skeleton_graphics_node_item.cc
new file mode 100644
index 00000000..cc2bbe07
--- /dev/null
+++ b/application/sources/skeleton_graphics_node_item.cc
@@ -0,0 +1,144 @@
+#include "skeleton_graphics_node_item.h"
+#include "theme.h"
+
+SkeletonGraphicsNodeItem::SkeletonGraphicsNodeItem(Document::Profile profile)
+    : m_profile(profile)
+    , m_hovered(false)
+    , m_checked(false)
+    , m_markColor(Qt::transparent)
+    , m_deactivated(false)
+    , m_rotated(false)
+{
+    setData(0, "node");
+    setRadius(32);
+}
+
+void SkeletonGraphicsNodeItem::setRotated(bool rotated)
+{
+    m_rotated = rotated;
+}
+
+void SkeletonGraphicsNodeItem::updateAppearance()
+{
+    QColor color = Qt::gray;
+
+    if (!m_deactivated) {
+        switch (m_profile) {
+        case Document::Profile::Unknown:
+            break;
+        case Document::Profile::Main:
+            color = m_rotated ? Theme::blue : Theme::red;
+            break;
+        case Document::Profile::Side:
+            color = Theme::green;
+            break;
+        }
+    }
+
+    QColor penColor = color;
+    penColor.setAlphaF((m_checked || m_hovered) ? Theme::checkedAlpha : Theme::normalAlpha);
+    QPen pen(penColor);
+    pen.setWidth(0);
+    setPen(pen);
+
+    QColor brushColor;
+    Qt::BrushStyle style;
+    if (m_markColor == Qt::transparent) {
+        brushColor = color;
+        brushColor.setAlphaF((m_checked || m_hovered) ? Theme::fillAlpha : 0);
+        style = Qt::SolidPattern;
+    } else {
+        brushColor = m_markColor;
+        brushColor.setAlphaF((m_checked || m_hovered) ? Theme::fillAlpha * 4 : Theme::fillAlpha * 1.5);
+        style = Qt::Dense4Pattern;
+    }
+    if (m_checked)
+        brushColor.setAlphaF(brushColor.alphaF() * 1.2);
+    QBrush brush(brushColor);
+    brush.setStyle(style);
+    setBrush(brush);
+}
+
+void SkeletonGraphicsNodeItem::setOrigin(QPointF point)
+{
+    QPointF moveBy = point - origin();
+    QRectF newRect = rect();
+    newRect.adjust(moveBy.x(), moveBy.y(), moveBy.x(), moveBy.y());
+    setRect(newRect);
+    updateAppearance();
+}
+
+QPointF SkeletonGraphicsNodeItem::origin()
+{
+    return QPointF(rect().x() + rect().width() / 2,
+        rect().y() + rect().height() / 2);
+}
+
+float SkeletonGraphicsNodeItem::radius()
+{
+    return rect().width() / 2;
+}
+
+void SkeletonGraphicsNodeItem::setRadius(float radius)
+{
+    if (radius < 1)
+        radius = 1;
+    QPointF oldOrigin = origin();
+    setRect(oldOrigin.x() - radius, oldOrigin.y() - radius,
+        radius * 2, radius * 2);
+    updateAppearance();
+}
+
+void SkeletonGraphicsNodeItem::setMarkColor(QColor color)
+{
+    m_markColor = color;
+    updateAppearance();
+}
+
+Document::Profile SkeletonGraphicsNodeItem::profile()
+{
+    return m_profile;
+}
+
+dust3d::Uuid SkeletonGraphicsNodeItem::id()
+{
+    return m_uuid;
+}
+
+void SkeletonGraphicsNodeItem::setId(dust3d::Uuid id)
+{
+    m_uuid = id;
+}
+
+void SkeletonGraphicsNodeItem::setHovered(bool hovered)
+{
+    m_hovered = hovered;
+    updateAppearance();
+}
+
+void SkeletonGraphicsNodeItem::setChecked(bool checked)
+{
+    m_checked = checked;
+    updateAppearance();
+}
+
+void SkeletonGraphicsNodeItem::setDeactivated(bool deactivated)
+{
+    m_deactivated = deactivated;
+    updateAppearance();
+}
+
+bool SkeletonGraphicsNodeItem::deactivated()
+{
+    return m_deactivated;
+}
+
+bool SkeletonGraphicsNodeItem::checked()
+{
+    return m_checked;
+}
+
+bool SkeletonGraphicsNodeItem::hovered()
+{
+    return m_hovered;
+}
\ No newline at end of file
diff --git a/application/sources/skeleton_graphics_node_item.h b/application/sources/skeleton_graphics_node_item.h
new file mode 100644
index 00000000..6d55ace4
--- /dev/null
+++ b/application/sources/skeleton_graphics_node_item.h
@@ -0,0 +1,37 @@
+#ifndef DUST3D_APPLICATION_SKELETON_NODE_ITEM_H_
+#define DUST3D_APPLICATION_SKELETON_NODE_ITEM_H_
+
+#include "document.h"
+#include <QGraphicsEllipseItem>
+
+class SkeletonGraphicsNodeItem : public QGraphicsEllipseItem {
+public:
+    SkeletonGraphicsNodeItem(Document::Profile profile = Document::Profile::Unknown);
+    void setRotated(bool rotated);
+    void updateAppearance();
+    void setOrigin(QPointF point);
+    QPointF origin();
+    float radius();
+    void setRadius(float radius);
+    void setMarkColor(QColor color);
+    Document::Profile profile();
+    dust3d::Uuid id();
+    void setId(dust3d::Uuid id);
+    void setHovered(bool hovered);
+    void setChecked(bool checked);
+    void setDeactivated(bool deactivated);
+    bool deactivated();
+    bool checked();
+    bool hovered();
+
+private:
+    dust3d::Uuid m_uuid;
+    Document::Profile m_profile = Document::Profile::Unknown;
+    bool m_hovered = false;
+    bool m_checked = false;
+    QColor m_markColor;
+    bool m_deactivated = false;
+    bool m_rotated = false;
+};
+
+#endif
diff --git a/application/sources/skeleton_graphics_origin_item.cc b/application/sources/skeleton_graphics_origin_item.cc
new file mode 100644
index 00000000..818771b6
--- /dev/null
+++ b/application/sources/skeleton_graphics_origin_item.cc
@@ -0,0 +1,79 @@
+#include "skeleton_graphics_origin_item.h"
+#include "theme.h"
+
+SkeletonGraphicsOriginItem::SkeletonGraphicsOriginItem(Document::Profile profile)
+    : m_profile(profile)
+    , m_hovered(false)
+    , m_checked(false)
+    , m_rotated(false)
+{
+    setData(0, "origin");
+}
+void SkeletonGraphicsOriginItem::setRotated(bool rotated)
+{
+    m_rotated = rotated;
+}
+void SkeletonGraphicsOriginItem::updateAppearance()
+{
+    QColor color = Theme::white;
+
+    switch (m_profile) {
+    case Document::Profile::Unknown:
+        break;
+    case Document::Profile::Main:
+        color = m_rotated ? Theme::blue : Theme::red;
+        break;
+    case Document::Profile::Side:
+        color = Theme::green;
+        break;
+    }
+
+    QColor penColor = color;
+    penColor.setAlphaF(m_checked ? Theme::checkedAlpha : Theme::normalAlpha);
+    QPen pen(penColor);
+    pen.setWidth(0);
+    setPen(pen);
+
+    QColor brushColor = color;
+    brushColor.setAlphaF((m_checked || m_hovered) ? Theme::checkedAlpha : Theme::normalAlpha);
+    QBrush brush(brushColor);
+    setBrush(brush);
+}
+void SkeletonGraphicsOriginItem::setOrigin(QPointF point)
+{
+    m_origin = point;
+    QPolygonF triangle;
+    const int triangleRadius = 10;
+    triangle.append(QPointF(point.x() - triangleRadius, point.y()));
+    triangle.append(QPointF(point.x() + triangleRadius, point.y()));
+    triangle.append(QPointF(point.x(), point.y() - triangleRadius));
+    triangle.append(QPointF(point.x() - triangleRadius, point.y()));
+    setPolygon(triangle);
+    updateAppearance();
+}
+QPointF SkeletonGraphicsOriginItem::origin()
+{
+    return m_origin;
+}
+Document::Profile SkeletonGraphicsOriginItem::profile()
+{
+    return m_profile;
+}
+void SkeletonGraphicsOriginItem::setHovered(bool hovered)
+{
+    m_hovered = hovered;
+    updateAppearance();
+}
+void SkeletonGraphicsOriginItem::setChecked(bool checked)
+{
+    m_checked = checked;
+    updateAppearance();
+}
+bool SkeletonGraphicsOriginItem::checked()
+{
+    return m_checked;
+}
+bool SkeletonGraphicsOriginItem::hovered()
+{
+    return m_hovered;
+}
diff --git a/application/sources/skeleton_graphics_origin_item.h b/application/sources/skeleton_graphics_origin_item.h
new file mode 100644
index 00000000..a8cc3382
--- /dev/null
+++ b/application/sources/skeleton_graphics_origin_item.h
@@ -0,0 +1,28 @@
+#ifndef DUST3D_APPLICATION_SKELETON_ORIGIN_ITEM_H_
+#define DUST3D_APPLICATION_SKELETON_ORIGIN_ITEM_H_
+
+#include "document.h"
+#include <QGraphicsPolygonItem>
+
+class SkeletonGraphicsOriginItem : public QGraphicsPolygonItem {
+public:
+    SkeletonGraphicsOriginItem(Document::Profile profile = Document::Profile::Unknown);
+    void setRotated(bool rotated);
+    void updateAppearance();
+    void setOrigin(QPointF point);
+    QPointF origin();
+    Document::Profile profile();
+    void setHovered(bool hovered);
+    void setChecked(bool checked);
+    bool checked();
+    bool hovered();
+
+private:
+    Document::Profile m_profile = Document::Profile::Unknown;
+    bool m_hovered = false;
+    bool m_checked = false;
+    QPointF m_origin;
+    bool m_rotated = false;
+};
+
+#endif
diff --git a/application/sources/skeleton_graphics_selection_item.cc b/application/sources/skeleton_graphics_selection_item.cc
new file mode 100644
index 00000000..e7b6bacc
--- /dev/null
+++ b/application/sources/skeleton_graphics_selection_item.cc
@@ -0,0 +1,16 @@
+#include "skeleton_graphics_selection_item.h"
+#include "theme.h"
+
+SkeletonGraphicsSelectionItem::SkeletonGraphicsSelectionItem()
+{
+    QColor penColor = Theme::white;
+    QPen pen(penColor);
+    pen.setWidth(0);
+    pen.setStyle(Qt::DashLine);
+    setPen(pen);
+}
+
+void SkeletonGraphicsSelectionItem::updateRange(QPointF beginPos, QPointF endPos)
+{
+    setRect(QRectF(beginPos, endPos).normalized());
+}
\ No newline at end of file
diff --git a/application/sources/skeleton_graphics_selection_item.h b/application/sources/skeleton_graphics_selection_item.h
new file mode 100644
index 00000000..14891c8d
--- /dev/null
+++ b/application/sources/skeleton_graphics_selection_item.h
@@ -0,0 +1,13 @@
+#ifndef DUST3D_APPLICATION_SKELETON_SELECTION_ITEM_H_
+#define DUST3D_APPLICATION_SKELETON_SELECTION_ITEM_H_
+
+#include "document.h"
+#include <QGraphicsRectItem>
+
+class SkeletonGraphicsSelectionItem : public QGraphicsRectItem {
+public:
+    SkeletonGraphicsSelectionItem();
+    void updateRange(QPointF beginPos, QPointF endPos);
+};
+
+#endif
diff --git a/application/sources/skeleton_graphics_widget.cc b/application/sources/skeleton_graphics_widget.cc
index b8836659..f4b13767 100644
--- a/application/sources/skeleton_graphics_widget.cc
+++ b/application/sources/skeleton_graphics_widget.cc
@@ -1,4 +1,8 @@
 #include "skeleton_graphics_widget.h"
+#include "skeleton_graphics_edge_item.h"
+#include "skeleton_graphics_node_item.h"
+#include "skeleton_graphics_origin_item.h"
+#include "skeleton_graphics_selection_item.h"
 #include "theme.h"
 #include <QApplication>
 #include <QBitmap>
diff --git a/application/sources/skeleton_graphics_widget.h b/application/sources/skeleton_graphics_widget.h
index 537adb94..9e6a53e5 100644
--- a/application/sources/skeleton_graphics_widget.h
+++ b/application/sources/skeleton_graphics_widget.h
@@ -1,15 +1,12 @@
-#ifndef DUST3D_APPLICATION_SKELETON_GRAPHICS_VIEW_H_
-#define DUST3D_APPLICATION_SKELETON_GRAPHICS_VIEW_H_
+#ifndef DUST3D_APPLICATION_SKELETON_GRAPHICS_WIDGET_H_
+#define DUST3D_APPLICATION_SKELETON_GRAPHICS_WIDGET_H_
 
 #include "document.h"
 #include "model_widget.h"
 #include "skeleton_ik_mover.h"
 #include "theme.h"
 #include "turnaround_loader.h"
-#include <QGraphicsEllipseItem>
-#include <QGraphicsLineItem>
 #include <QGraphicsPixmapItem>
-#include <QGraphicsPolygonItem>
 #include <QGraphicsView>
 #include <QKeyEvent>
 #include <QMouseEvent>
@@ -19,374 +16,10 @@
 #include <map>
 #include <set>
 
-class SkeletonGraphicsOriginItem : public QGraphicsPolygonItem {
-public:
-    SkeletonGraphicsOriginItem(Document::Profile profile = Document::Profile::Unknown)
-        : m_profile(profile)
-        , m_hovered(false)
-        , m_checked(false)
-        , m_rotated(false)
-    {
-        setData(0, "origin");
-    }
-    void setRotated(bool rotated)
-    {
-        m_rotated = rotated;
-    }
-    void updateAppearance()
-    {
-        QColor color = Theme::white;
-
-        switch (m_profile) {
-        case Document::Profile::Unknown:
-            break;
-        case Document::Profile::Main:
-            color = m_rotated ? Theme::blue : Theme::red;
-            break;
-        case Document::Profile::Side:
-            color = Theme::green;
-            break;
-        }
-
-        QColor penColor = color;
-        penColor.setAlphaF(m_checked ? Theme::checkedAlpha : Theme::normalAlpha);
-        QPen pen(penColor);
-        pen.setWidth(0);
-        setPen(pen);
-
-        QColor brushColor = color;
-        brushColor.setAlphaF((m_checked || m_hovered) ? Theme::checkedAlpha : Theme::normalAlpha);
-        QBrush brush(brushColor);
-        setBrush(brush);
-    }
-    void setOrigin(QPointF point)
-    {
-        m_origin = point;
-        QPolygonF triangle;
-        const int triangleRadius = 10;
-        triangle.append(QPointF(point.x() - triangleRadius, point.y()));
-        triangle.append(QPointF(point.x() + triangleRadius, point.y()));
-        triangle.append(QPointF(point.x(), point.y() - triangleRadius));
-        triangle.append(QPointF(point.x() - triangleRadius, point.y()));
-        setPolygon(triangle);
-        updateAppearance();
-    }
-    QPointF origin()
-    {
-        return m_origin;
-    }
-    Document::Profile profile()
-    {
-        return m_profile;
-    }
-    void setHovered(bool hovered)
-    {
-        m_hovered = hovered;
-        updateAppearance();
-    }
-    void setChecked(bool checked)
-    {
-        m_checked = checked;
-        updateAppearance();
-    }
-    bool checked()
-    {
-        return m_checked;
-    }
-    bool hovered()
-    {
-        return m_hovered;
-    }
-
-private:
-    Document::Profile m_profile;
-    bool m_hovered;
-    bool m_checked;
-    QPointF m_origin;
-    bool m_rotated;
-};
-
-class SkeletonGraphicsSelectionItem : public QGraphicsRectItem {
-public:
-    SkeletonGraphicsSelectionItem()
-    {
-        QColor penColor = Theme::white;
-        QPen pen(penColor);
-        pen.setWidth(0);
-        pen.setStyle(Qt::DashLine);
-        setPen(pen);
-    }
-    void updateRange(QPointF beginPos, QPointF endPos)
-    {
-        setRect(QRectF(beginPos, endPos).normalized());
-    }
-};
-
-class SkeletonGraphicsNodeItem : public QGraphicsEllipseItem {
-public:
-    SkeletonGraphicsNodeItem(Document::Profile profile = Document::Profile::Unknown)
-        : m_profile(profile)
-        , m_hovered(false)
-        , m_checked(false)
-        , m_markColor(Qt::transparent)
-        , m_deactivated(false)
-        , m_rotated(false)
-    {
-        setData(0, "node");
-        setRadius(32);
-    }
-    void setRotated(bool rotated)
-    {
-        m_rotated = rotated;
-    }
-    void updateAppearance()
-    {
-        QColor color = Qt::gray;
-
-        if (!m_deactivated) {
-            switch (m_profile) {
-            case Document::Profile::Unknown:
-                break;
-            case Document::Profile::Main:
-                color = m_rotated ? Theme::blue : Theme::red;
-                break;
-            case Document::Profile::Side:
-                color = Theme::green;
-                break;
-            }
-        }
-
-        QColor penColor = color;
-        penColor.setAlphaF((m_checked || m_hovered) ? Theme::checkedAlpha : Theme::normalAlpha);
-        QPen pen(penColor);
-        pen.setWidth(0);
-        setPen(pen);
-
-        QColor brushColor;
-        Qt::BrushStyle style;
-        if (m_markColor == Qt::transparent) {
-            brushColor = color;
-            brushColor.setAlphaF((m_checked || m_hovered) ? Theme::fillAlpha : 0);
-            style = Qt::SolidPattern;
-        } else {
-            brushColor = m_markColor;
-            brushColor.setAlphaF((m_checked || m_hovered) ? Theme::fillAlpha * 4 : Theme::fillAlpha * 1.5);
-            style = Qt::Dense4Pattern;
-        }
-        if (m_checked)
-            brushColor.setAlphaF(brushColor.alphaF() * 1.2);
-        QBrush brush(brushColor);
-        brush.setStyle(style);
-        setBrush(brush);
-    }
-    void setOrigin(QPointF point)
-    {
-        QPointF moveBy = point - origin();
-        QRectF newRect = rect();
-        newRect.adjust(moveBy.x(), moveBy.y(), moveBy.x(), moveBy.y());
-        setRect(newRect);
-        updateAppearance();
-    }
-    QPointF origin()
-    {
-        return QPointF(rect().x() + rect().width() / 2,
-            rect().y() + rect().height() / 2);
-    }
-    float radius()
-    {
-        return rect().width() / 2;
-    }
-    void setRadius(float radius)
-    {
-        if (radius < 1)
-            radius = 1;
-        QPointF oldOrigin = origin();
-        setRect(oldOrigin.x() - radius, oldOrigin.y() - radius,
-            radius * 2, radius * 2);
-        updateAppearance();
-    }
-    void setMarkColor(QColor color)
-    {
-        m_markColor = color;
-        updateAppearance();
-    }
-    Document::Profile profile()
-    {
-        return m_profile;
-    }
-    dust3d::Uuid id()
-    {
-        return m_uuid;
-    }
-    void setId(dust3d::Uuid id)
-    {
-        m_uuid = id;
-    }
-    void setHovered(bool hovered)
-    {
-        m_hovered = hovered;
-        updateAppearance();
-    }
-    void setChecked(bool checked)
-    {
-        m_checked = checked;
-        updateAppearance();
-    }
-    void setDeactivated(bool deactivated)
-    {
-        m_deactivated = deactivated;
-        updateAppearance();
-    }
-    bool deactivated()
-    {
-        return m_deactivated;
-    }
-    bool checked()
-    {
-        return m_checked;
-    }
-    bool hovered()
-    {
-        return m_hovered;
-    }
-
-private:
-    dust3d::Uuid m_uuid;
-    Document::Profile m_profile;
-    bool m_hovered;
-    bool m_checked;
-    QColor m_markColor;
-    bool m_deactivated;
-    bool m_rotated;
-};
-
-class SkeletonGraphicsEdgeItem : public QGraphicsPolygonItem {
-public:
-    SkeletonGraphicsEdgeItem()
-        : m_firstItem(nullptr)
-        , m_secondItem(nullptr)
-        , m_hovered(false)
-        , m_checked(false)
-        , m_profile(Document::Profile::Unknown)
-        , m_deactivated(false)
-        , m_rotated(false)
-    {
-        setData(0, "edge");
-    }
-    void setRotated(bool rotated)
-    {
-        m_rotated = rotated;
-    }
-    void setEndpoints(SkeletonGraphicsNodeItem* first, SkeletonGraphicsNodeItem* second)
-    {
-        m_firstItem = first;
-        m_secondItem = second;
-        updateAppearance();
-    }
-    SkeletonGraphicsNodeItem* firstItem()
-    {
-        return m_firstItem;
-    }
-    SkeletonGraphicsNodeItem* secondItem()
-    {
-        return m_secondItem;
-    }
-    void updateAppearance()
-    {
-        if (nullptr == m_firstItem || nullptr == m_secondItem)
-            return;
-
-        m_profile = m_firstItem->profile();
-
-        QLineF line(m_firstItem->origin(), m_secondItem->origin());
-
-        QPolygonF polygon;
-        float radAngle = line.angle() * M_PI / 180;
-        float dx = 2 * sin(radAngle);
-        float dy = 2 * cos(radAngle);
-        QPointF offset1 = QPointF(dx, dy);
-        QPointF offset2 = QPointF(-dx, -dy);
-        //polygon << line.p1() + offset1 << line.p1() + offset2 << line.p2() + offset2 << line.p2() + offset1;
-        polygon << line.p1() + offset1 << line.p1() + offset2 << line.p2();
-        setPolygon(polygon);
-
-        QColor color = Qt::gray;
-
-        if (!m_deactivated) {
-            switch (m_firstItem->profile()) {
-            case Document::Profile::Unknown:
-                break;
-            case Document::Profile::Main:
-                color = m_rotated ? Theme::blue : Theme::red;
-                break;
-            case Document::Profile::Side:
-                color = Theme::green;
-                break;
-            }
-        }
-
-        QColor penColor = color;
-        penColor.setAlphaF((m_checked || m_hovered) ? Theme::checkedAlpha : Theme::normalAlpha);
-        QPen pen(penColor);
-        pen.setWidth(0);
-        setPen(pen);
-    }
-    dust3d::Uuid id()
-    {
-        return m_uuid;
-    }
-    void setId(dust3d::Uuid id)
-    {
-        m_uuid = id;
-    }
-    Document::Profile profile()
-    {
-        return m_profile;
-    }
-    void setHovered(bool hovered)
-    {
-        m_hovered = hovered;
-        updateAppearance();
-    }
-    void setChecked(bool checked)
-    {
-        m_checked = checked;
-        updateAppearance();
-    }
-    void setDeactivated(bool deactivated)
-    {
-        m_deactivated = deactivated;
-        updateAppearance();
-    }
-    void reverse()
-    {
-        std::swap(m_firstItem, m_secondItem);
-        updateAppearance();
-    }
-    bool deactivated()
-    {
-        return m_deactivated;
-    }
-    bool checked()
-    {
-        return m_checked;
-    }
-    bool hovered()
-    {
-        return m_hovered;
-    }
-
-private:
-    dust3d::Uuid m_uuid;
-    SkeletonGraphicsNodeItem* m_firstItem;
-    SkeletonGraphicsNodeItem* m_secondItem;
-    QPolygonF m_selectionPolygon;
-    bool m_hovered;
-    bool m_checked;
-    Document::Profile m_profile;
-    bool m_deactivated;
-    bool m_rotated;
-};
+class SkeletonGraphicsEdgeItem;
+class SkeletonGraphicsNodeItem;
+class SkeletonGraphicsOriginItem;
+class SkeletonGraphicsSelectionItem;
 
 class SkeletonGraphicsWidget : public QGraphicsView {
     Q_OBJECT