diff --git a/src/barchart/qbarmodelmapper.cpp b/src/barchart/qbarmodelmapper.cpp
index 5982617..e0023af 100644
--- a/src/barchart/qbarmodelmapper.cpp
+++ b/src/barchart/qbarmodelmapper.cpp
@@ -193,6 +193,7 @@ void QBarModelMapper::setLastBarSetSection(int lastBarSetSection)
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
 QBarModelMapperPrivate::QBarModelMapperPrivate(QBarModelMapper *q) :
+    QObject(q),
     m_series(0),
     m_model(0),
     m_first(0),
diff --git a/src/piechart/piechart.pri b/src/piechart/piechart.pri
index acb7061..7bce39a 100644
--- a/src/piechart/piechart.pri
+++ b/src/piechart/piechart.pri
@@ -8,7 +8,8 @@ SOURCES += \
     $$PWD/qpieslice.cpp \
     $$PWD/qpiemodelmapper.cpp \
     $$PWD/qvpiemodelmapper.cpp \
-    $$PWD/qhpiemodelmapper.cpp
+    $$PWD/qhpiemodelmapper.cpp \
+    piechart/qdonutgroup.cpp
 
 PRIVATE_HEADERS += \
     $$PWD/pieslicedata_p.h \
@@ -16,12 +17,13 @@ PRIVATE_HEADERS += \
     $$PWD/piesliceitem_p.h \
     $$PWD/qpieslice_p.h \
     $$PWD/qpieseries_p.h \
-    $$PWD/qpiemodelmapper_p.h
+    $$PWD/qpiemodelmapper_p.h \
+    $$PWD/qdonutgroup_p.h
 
 PUBLIC_HEADERS += \
     $$PWD/qpieseries.h \
     $$PWD/qpieslice.h \
     $$PWD/qpiemodelmapper.h \
     $$PWD/qvpiemodelmapper.h \
-    $$PWD/qhpiemodelmapper.h
- 
+    $$PWD/qhpiemodelmapper.h \
+    $$PWD/qdonutgroup.h
diff --git a/src/piechart/piechartitem.cpp b/src/piechart/piechartitem.cpp
index 90bb5a1..f324a13 100644
--- a/src/piechart/piechartitem.cpp
+++ b/src/piechart/piechartitem.cpp
@@ -106,8 +106,10 @@ void PieChartItem::updateLayout()
     if (m_rect.width() < m_rect.height())
         m_pieRadius = m_rect.width() / 2;
 
+    m_donutInnerRadius = m_pieRadius;
     // apply size factor
     m_pieRadius *= m_series->pieSize();
+    m_donutInnerRadius *= m_series->donutInnerSize();
 
     // set layouts for existing slice items
     foreach (QPieSlice* slice, m_series->slices()) {
@@ -215,6 +217,7 @@ PieSliceData PieChartItem::updateSliceGeometry(QPieSlice *slice)
     sliceData.m_center = PieSliceItem::sliceCenter(m_pieCenter, m_pieRadius, slice);
     sliceData.m_radius = m_pieRadius;
     sliceData.m_donut = m_series->donut();
+    sliceData.m_innerRadius = m_donutInnerRadius;
     return sliceData;
 }
 
diff --git a/src/piechart/piechartitem_p.h b/src/piechart/piechartitem_p.h
index 2e6f88b..3552f38 100644
--- a/src/piechart/piechartitem_p.h
+++ b/src/piechart/piechartitem_p.h
@@ -73,6 +73,7 @@ private:
     QRectF m_rect;
     QPointF m_pieCenter;
     qreal m_pieRadius;
+    qreal m_donutInnerRadius;
 };
 
 QTCOMMERCIALCHART_END_NAMESPACE
diff --git a/src/piechart/pieslicedata_p.h b/src/piechart/pieslicedata_p.h
index 276b5dd..45ecefa 100644
--- a/src/piechart/pieslicedata_p.h
+++ b/src/piechart/pieslicedata_p.h
@@ -82,7 +82,9 @@ public:
         m_radius = 0;
         m_startAngle = 0;
         m_angleSpan = 0;
+
         m_donut = false;
+        m_innerRadius = 0;
     }
 
     bool operator!=(const PieSliceData &other) const
@@ -136,7 +138,9 @@ public:
     qreal m_radius;
     qreal m_startAngle;
     qreal m_angleSpan;
+
     bool m_donut;
+    qreal m_innerRadius;
 };
 
 QTCOMMERCIALCHART_END_NAMESPACE
diff --git a/src/piechart/piesliceitem.cpp b/src/piechart/piesliceitem.cpp
index b77d392..ff6a50a 100644
--- a/src/piechart/piesliceitem.cpp
+++ b/src/piechart/piesliceitem.cpp
@@ -176,8 +176,7 @@ QPainterPath PieSliceItem::slicePath(QPointF center, qreal radius, qreal startAn
     // slice path
     QPainterPath path;
     if (m_data.m_donut) {
-        qreal donutFraction = 5.0;
-        QRectF insideRect = rect.adjusted(rect.width() / donutFraction, rect.height() / donutFraction, -rect.width() / donutFraction, -rect.height() / donutFraction);
+        QRectF insideRect(center.x() - m_data.m_innerRadius, center.y()-m_data.m_innerRadius, m_data.m_innerRadius*2, m_data.m_innerRadius*2);
         path.arcMoveTo(rect, -startAngle + 90);
         path.arcTo(rect, -startAngle + 90, -angleSpan);
         path.arcTo(insideRect, -startAngle + 90 - angleSpan, angleSpan);
diff --git a/src/piechart/qdonutgroup.cpp b/src/piechart/qdonutgroup.cpp
new file mode 100644
index 0000000..e930a3d
--- /dev/null
+++ b/src/piechart/qdonutgroup.cpp
@@ -0,0 +1,39 @@
+#include "qdonutgroup.h"
+#include "qdonutgroup_p.h"
+
+QTCOMMERCIALCHART_BEGIN_NAMESPACE
+
+QDonutGroup::QDonutGroup(QObject *parent) :
+    QObject(parent),
+    d_ptr(new QDonutGroupPrivate(this))
+{
+}
+
+void QDonutGroup::append(QPieSeries *donut)
+{
+    if (donut == 0)
+        return;
+
+    donut->setDonut();
+    Q_D(QDonutGroup);
+    d->m_donuts.append(donut);
+    qreal donutFraction = 1.0 / (d->m_donuts.count() + 1);
+    for(int i = 0; i < d->m_donuts.count(); i++) {
+        d->m_donuts[i]->setPieSize( (i + 2) * donutFraction);
+        d->m_donuts[i]->setDonutInnerSize( (i + 1)  * donutFraction);
+    }
+}
+
+///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
+
+QDonutGroupPrivate::QDonutGroupPrivate(QDonutGroup *q):
+    QObject(q),
+    q_ptr(q)
+{
+    //
+}
+
+#include "moc_qdonutgroup.cpp"
+#include "moc_qdonutgroup_p.cpp"
+
+QTCOMMERCIALCHART_END_NAMESPACE
diff --git a/src/piechart/qdonutgroup.h b/src/piechart/qdonutgroup.h
new file mode 100644
index 0000000..e25abb0
--- /dev/null
+++ b/src/piechart/qdonutgroup.h
@@ -0,0 +1,27 @@
+#ifndef QDONUTGROUP_H
+#define QDONUTGROUP_H
+
+#include <QObject>
+#include <QPieSeries>
+
+QTCOMMERCIALCHART_BEGIN_NAMESPACE
+
+//class QPieSeries;
+class QDonutGroupPrivate;
+
+class QTCOMMERCIALCHART_EXPORT QDonutGroup : public QObject
+{
+    Q_OBJECT
+public:
+    explicit QDonutGroup(QObject *parent = 0);
+
+    void append(QPieSeries *donut);
+
+protected:
+    QDonutGroupPrivate * const d_ptr;
+    Q_DECLARE_PRIVATE(QDonutGroup)
+};
+
+QTCOMMERCIALCHART_END_NAMESPACE
+
+#endif // QDONUTGROUP_H
diff --git a/src/piechart/qdonutgroup_p.h b/src/piechart/qdonutgroup_p.h
new file mode 100644
index 0000000..deb3f20
--- /dev/null
+++ b/src/piechart/qdonutgroup_p.h
@@ -0,0 +1,29 @@
+#ifndef QDONUTGROUP_P_H
+#define QDONUTGROUP_P_H
+
+#include <QObject>
+#include <qdonutgroup.h>
+
+QTCOMMERCIALCHART_BEGIN_NAMESPACE
+
+class QPieSeries;
+
+class QDonutGroupPrivate : public QObject
+{
+    Q_OBJECT
+public:
+    explicit QDonutGroupPrivate(QDonutGroup *q);
+
+    void append(QPieSeries *donut);
+
+private:
+    QList<QPieSeries *> m_donuts;
+
+private:
+    QDonutGroup *q_ptr;
+    Q_DECLARE_PUBLIC(QDonutGroup)
+};
+
+QTCOMMERCIALCHART_END_NAMESPACE
+
+#endif // QDONUTGROUP_P_H
diff --git a/src/piechart/qpiemodelmapper.cpp b/src/piechart/qpiemodelmapper.cpp
index 14e62fc..e3224bb 100644
--- a/src/piechart/qpiemodelmapper.cpp
+++ b/src/piechart/qpiemodelmapper.cpp
@@ -191,6 +191,7 @@ void QPieModelMapper::setLabelsSection(int labelsSection)
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
 QPieModelMapperPrivate::QPieModelMapperPrivate(QPieModelMapper *q) :
+    QObject(q),
     m_series(0),
     m_model(0),
     m_first(0),
diff --git a/src/piechart/qpieseries.cpp b/src/piechart/qpieseries.cpp
index 6a7e6a5..e5b55a4 100644
--- a/src/piechart/qpieseries.cpp
+++ b/src/piechart/qpieseries.cpp
@@ -536,6 +536,26 @@ bool QPieSeries::donut() const
     return d->m_donutChart;
 }
 
+void QPieSeries::setDonutInnerSize(qreal innerSize)
+{
+    Q_D(QPieSeries);
+
+    if (innerSize < 0.0)
+        innerSize = 0.0;
+    if (innerSize > 1.0)
+        innerSize = 1.0;
+
+    d->m_donutRelativeInnerSize = innerSize;
+    d->updateDerivativeData();
+    emit d->pieSizeChanged();
+}
+
+qreal QPieSeries::donutInnerSize() const
+{
+    Q_D(const QPieSeries);
+    return d->m_donutRelativeInnerSize;
+}
+
 void QPieSeries::setHorizontalPosition(qreal relativePosition)
 {
     Q_D(QPieSeries);
@@ -674,7 +694,8 @@ QPieSeriesPrivate::QPieSeriesPrivate(QPieSeries *parent) :
     m_pieStartAngle(0),
     m_pieEndAngle(360),
     m_sum(0),
-    m_donutChart(false)
+    m_donutChart(false),
+    m_donutRelativeInnerSize(0.5)
 {
 }
 
@@ -707,7 +728,6 @@ void QPieSeriesPrivate::updateDerivativeData()
         d->setPercentage(s->value() / m_sum);
         d->setStartAngle(sliceAngle);
         d->setAngleSpan(pieSpan * s->percentage());
-        d->m_data.m_donut = m_donutChart;
         sliceAngle += s->angleSpan();
     }
 
diff --git a/src/piechart/qpieseries.h b/src/piechart/qpieseries.h
index 70366a3..25db8c7 100644
--- a/src/piechart/qpieseries.h
+++ b/src/piechart/qpieseries.h
@@ -64,6 +64,9 @@ public:
     void setDonut(bool donut = true);
     bool donut() const;
 
+    void setDonutInnerSize(qreal innerSize);
+    qreal donutInnerSize() const;
+
     void setHorizontalPosition(qreal relativePosition);
     qreal horizontalPosition() const;
 
diff --git a/src/piechart/qpieseries_p.h b/src/piechart/qpieseries_p.h
index dbb87e8..ccab671 100644
--- a/src/piechart/qpieseries_p.h
+++ b/src/piechart/qpieseries_p.h
@@ -78,6 +78,7 @@ private:
     qreal m_pieEndAngle;
     qreal m_sum;
     bool m_donutChart;
+    qreal m_donutRelativeInnerSize;
 
 private:
     friend class QLegendPrivate;
diff --git a/src/xychart/qxymodelmapper.cpp b/src/xychart/qxymodelmapper.cpp
index 5ca618f..70922ae 100644
--- a/src/xychart/qxymodelmapper.cpp
+++ b/src/xychart/qxymodelmapper.cpp
@@ -202,6 +202,7 @@ void QXYModelMapper::setYSection(int ySection)
 ///////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
 
 QXYModelMapperPrivate::QXYModelMapperPrivate(QXYModelMapper *q) :
+    QObject(q),
     m_series(0),
     m_model(0),
     m_first(0),