diff --git a/src/axis/axisitem.cpp b/src/axis/axisitem.cpp
index 00cb29b..84067af 100644
--- a/src/axis/axisitem.cpp
+++ b/src/axis/axisitem.cpp
@@ -15,20 +15,20 @@ Chart(presenter),
 m_chartAxis(axis),
 m_type(type),
 m_labelsAngle(0),
-m_grid(new QGraphicsItemGroup(presenter->rootItem())),
-m_shades(new QGraphicsItemGroup(presenter->rootItem())),
-m_labels(new QGraphicsItemGroup(presenter->rootItem())),
-m_axis(new QGraphicsItemGroup(presenter->rootItem())),
+m_grid(presenter->rootItem()),
+m_shades(presenter->rootItem()),
+m_labels(presenter->rootItem()),
+m_axis(presenter->rootItem()),
 m_min(0),
 m_max(0),
 m_ticksCount(0)
 {
     //initial initialization
-    m_axis->setZValue(ChartPresenter::AxisZValue);
-    m_axis->setHandlesChildEvents(false);
+    m_axis.setZValue(ChartPresenter::AxisZValue);
+    m_axis.setHandlesChildEvents(false);
 
-    m_shades->setZValue(ChartPresenter::ShadesZValue);
-    m_grid->setZValue(ChartPresenter::GridZValue);
+    m_shades.setZValue(ChartPresenter::ShadesZValue);
+    m_grid.setZValue(ChartPresenter::GridZValue);
 
     QObject::connect(m_chartAxis,SIGNAL(updated()),this,SLOT(handleAxisUpdated()));
     QObject::connect(m_chartAxis->categories(),SIGNAL(updated()),this,SLOT(handleAxisCategoriesUpdated()));
@@ -43,22 +43,22 @@ Axis::~Axis()
 void Axis::createItems(int count)
 {
 
-    if(m_axis->children().size()==0)
-           m_axis->addToGroup(new AxisItem(this));
+    if(m_axis.children().size()==0)
+           m_axis.addToGroup(new AxisItem(this));
     for (int i = 0; i < count; ++i) {
-           m_grid->addToGroup(new QGraphicsLineItem());
-           m_labels->addToGroup(new QGraphicsSimpleTextItem());
-           m_axis->addToGroup(new QGraphicsLineItem());
-          if((m_grid->childItems().size())%2 && m_grid->childItems().size()>2) m_shades->addToGroup(new QGraphicsRectItem());
+           m_grid.addToGroup(new QGraphicsLineItem());
+           m_labels.addToGroup(new QGraphicsSimpleTextItem());
+           m_axis.addToGroup(new QGraphicsLineItem());
+          if((m_grid.childItems().size())%2 && m_grid.childItems().size()>2) m_shades.addToGroup(new QGraphicsRectItem());
        }
 }
 
 void Axis::deleteItems(int count)
 {
-    QList<QGraphicsItem *> lines = m_grid->childItems();
-    QList<QGraphicsItem *> labels = m_labels->childItems();
-    QList<QGraphicsItem *> shades = m_shades->childItems();
-    QList<QGraphicsItem *> axis = m_axis->childItems();
+    QList<QGraphicsItem *> lines = m_grid.childItems();
+    QList<QGraphicsItem *> labels = m_labels.childItems();
+    QList<QGraphicsItem *> shades = m_shades.childItems();
+    QList<QGraphicsItem *> axis = m_axis.childItems();
 
     for (int i = 0; i < count; ++i) {
         if(lines.size()%2 && lines.size()>1) delete(shades.takeLast());
@@ -103,47 +103,47 @@ QStringList Axis::createLabels(int ticks, qreal min, qreal max) const
 
 void Axis::setAxisOpacity(qreal opacity)
 {
-    m_axis->setOpacity(opacity);
+    m_axis.setOpacity(opacity);
 }
 
 qreal Axis::axisOpacity() const
 {
-    return m_axis->opacity();
+    return m_axis.opacity();
 }
 
 void Axis::setGridOpacity(qreal opacity)
 {
-    m_grid->setOpacity(opacity);
+    m_grid.setOpacity(opacity);
 }
 
 qreal Axis::gridOpacity() const
 {
-    return m_grid->opacity();
+    return m_grid.opacity();
 }
 
 void Axis::setLabelsOpacity(qreal opacity)
 {
-    m_labels->setOpacity(opacity);
+    m_labels.setOpacity(opacity);
 }
 
 qreal Axis::labelsOpacity() const
 {
-    return m_labels->opacity();
+    return m_labels.opacity();
 }
 
 void Axis::setShadesOpacity(qreal opacity)
 {
-    m_shades->setOpacity(opacity);
+    m_shades.setOpacity(opacity);
 }
 
 qreal Axis::shadesOpacity() const
 {
-    return m_shades->opacity();
+    return m_shades.opacity();
 }
 
 void Axis::setLabelsAngle(int angle)
 {
-    foreach(QGraphicsItem* item , m_labels->childItems()) {
+    foreach(QGraphicsItem* item , m_labels.childItems()) {
           QPointF center = item->boundingRect().center();
           item->setRotation(angle);
     }
@@ -153,49 +153,49 @@ void Axis::setLabelsAngle(int angle)
 
 void Axis::setLabelsPen(const QPen& pen)
 {
-    foreach(QGraphicsItem* item , m_labels->childItems()) {
+    foreach(QGraphicsItem* item , m_labels.childItems()) {
         static_cast<QGraphicsSimpleTextItem*>(item)->setPen(pen);
     }
 }
 
 void Axis::setLabelsBrush(const QBrush& brush)
 {
-    foreach(QGraphicsItem* item , m_labels->childItems()) {
+    foreach(QGraphicsItem* item , m_labels.childItems()) {
         static_cast<QGraphicsSimpleTextItem*>(item)->setBrush(brush);
     }
 }
 
 void Axis::setLabelsFont(const QFont& font)
 {
-    foreach(QGraphicsItem* item , m_labels->childItems()) {
+    foreach(QGraphicsItem* item , m_labels.childItems()) {
         static_cast<QGraphicsSimpleTextItem*>(item)->setFont(font);
     }
 }
 
 void Axis::setShadesBrush(const QBrush& brush)
 {
-    foreach(QGraphicsItem* item , m_shades->childItems()) {
+    foreach(QGraphicsItem* item , m_shades.childItems()) {
         static_cast<QGraphicsRectItem*>(item)->setBrush(brush);
     }
 }
 
 void Axis::setShadesPen(const QPen& pen)
 {
-    foreach(QGraphicsItem* item , m_shades->childItems()) {
+    foreach(QGraphicsItem* item , m_shades.childItems()) {
         static_cast<QGraphicsRectItem*>(item)->setPen(pen);
     }
 }
 
 void Axis::setAxisPen(const QPen& pen)
 {
-    foreach(QGraphicsItem* item , m_axis->childItems()) {
+    foreach(QGraphicsItem* item , m_axis.childItems()) {
            static_cast<QGraphicsLineItem*>(item)->setPen(pen);
     }
 }
 
 void Axis::setGridPen(const QPen& pen)
 {
-    foreach(QGraphicsItem* item , m_grid->childItems()) {
+    foreach(QGraphicsItem* item , m_grid.childItems()) {
         static_cast<QGraphicsLineItem*>(item)->setPen(pen);
     }
 }
@@ -246,10 +246,10 @@ void Axis::setLayout(QVector<qreal>& layout)
 
     QStringList ticksList = createLabels(layout.size(),m_min,m_max);
 
-	QList<QGraphicsItem *> lines = m_grid->childItems();
-	QList<QGraphicsItem *> labels = m_labels->childItems();
-	QList<QGraphicsItem *> shades = m_shades->childItems();
-	QList<QGraphicsItem *> axis = m_axis->childItems();
+	QList<QGraphicsItem *> lines = m_grid.childItems();
+	QList<QGraphicsItem *> labels = m_labels.childItems();
+	QList<QGraphicsItem *> shades = m_shades.childItems();
+	QList<QGraphicsItem *> axis = m_axis.childItems();
 
 	Q_ASSERT(labels.size() == ticksList.size());
 	Q_ASSERT(layout.size() == ticksList.size());
diff --git a/src/axis/axisitem_p.h b/src/axis/axisitem_p.h
index 7ccc1ec..4551e1d 100644
--- a/src/axis/axisitem_p.h
+++ b/src/axis/axisitem_p.h
@@ -73,10 +73,10 @@ private:
     AxisType m_type;
     QRectF m_rect;
     int m_labelsAngle;
-    QGraphicsItemGroup *m_grid;
-    QGraphicsItemGroup *m_shades;
-    QGraphicsItemGroup *m_labels;
-    QGraphicsItemGroup *m_axis;
+    QGraphicsItemGroup m_grid;
+    QGraphicsItemGroup m_shades;
+    QGraphicsItemGroup m_labels;
+    QGraphicsItemGroup m_axis;
     QVector<qreal> m_layoutVector;
     qreal m_min;
     qreal m_max;