diff --git a/src/areachart/areachartitem.cpp b/src/areachart/areachartitem.cpp
index 91cab8c..9bd7365 100644
--- a/src/areachart/areachartitem.cpp
+++ b/src/areachart/areachartitem.cpp
@@ -10,7 +10,7 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
 
 //TODO: optimize : remove points which are not visible
 
-AreaChartItem::AreaChartItem(QAreaSeries* areaSeries,ChartPresenter *presenter):Chart(presenter),QGraphicsItem(presenter->rootItem()),
+AreaChartItem::AreaChartItem(QAreaSeries* areaSeries,ChartPresenter *presenter):ChartItem(presenter),
 m_series(areaSeries),
 m_upper(0),
 m_lower(0),
@@ -99,8 +99,12 @@ void AreaChartItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *opt
     Q_UNUSED(option)
 
     painter->save();
-    painter->setPen(m_linePen);
-    painter->setBrush(m_brush);
+    QPen pen;
+    pen.setCosmetic(false);
+    pen.setWidth(4);
+    pen.setColor(qRgb(200,0,250));
+    painter->setPen(pen);
+    //painter->setBrush(m_brush);
     painter->setClipRect(m_clipRect);
     painter->drawPath(m_path);
     if(m_pointsVisible){
diff --git a/src/areachart/areachartitem_p.h b/src/areachart/areachartitem_p.h
index ced1a66..17374cb 100644
--- a/src/areachart/areachartitem_p.h
+++ b/src/areachart/areachartitem_p.h
@@ -10,7 +10,7 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
 class QAreaSeries;
 class AreaChartItem;
 
-class AreaChartItem : public Chart, public QGraphicsItem
+class AreaChartItem : public ChartItem
 {
     Q_OBJECT
 public:
diff --git a/src/piechart/qpieseries.cpp b/src/piechart/qpieseries.cpp
index d400ea4..2a1f766 100644
--- a/src/piechart/qpieseries.cpp
+++ b/src/piechart/qpieseries.cpp
@@ -76,8 +76,7 @@ void QPieSeriesPrivate::updateDerivativeData()
 
 void QPieSeriesPrivate::sliceChanged()
 {
-    QPieSlice* slice = qobject_cast<QPieSlice *>(sender());
-    Q_ASSERT(m_slices.contains(slice));
+    Q_ASSERT(m_slices.contains(qobject_cast<QPieSlice *>(sender())));
     updateDerivativeData();
 }
 
diff --git a/src/scatterseries/scatterchartitem.cpp b/src/scatterseries/scatterchartitem.cpp
index 63a0342..93a5e0d 100644
--- a/src/scatterseries/scatterchartitem.cpp
+++ b/src/scatterseries/scatterchartitem.cpp
@@ -41,7 +41,7 @@ void ScatterChartItem::createPoints(int count)
 {
     for (int i = 0; i < count; ++i) {
 
-        QGraphicsItem *item;
+        QGraphicsItem *item = 0;
 
         switch (m_shape) {
                    case QScatterSeries::MarkerShapeCircle:{