diff --git a/examples/datetimeaxis/main.cpp b/examples/datetimeaxis/main.cpp
index 3f540ef..0de258a 100644
--- a/examples/datetimeaxis/main.cpp
+++ b/examples/datetimeaxis/main.cpp
@@ -38,11 +38,11 @@ int main(int argc, char *argv[])
 
     //![2]
     QDateTime momentInTime;
-    for (int i = 0; i < 100; i++) {
+    for (int i = 0; i < 200; i++) {
         momentInTime.setDate(QDate(2012, 1 , (1 + i / 9) % 28));
         momentInTime.setTime(QTime(9 + i % 9, 0));
         if (i > 0)
-            series->append(momentInTime.toMSecsSinceEpoch(), series->points().at(i - 1).y() *  (0.95 + (qrand() % 11) / 100.0));
+            series->append(momentInTime.toMSecsSinceEpoch(), series->points().at(i - 1).y() *  (0.99 + (qrand() % 3) / 100.0));
         else
             series->append(momentInTime.toMSecsSinceEpoch(), 45);
     }
@@ -54,13 +54,7 @@ int main(int argc, char *argv[])
     chart->addSeries(series);
     chart->createDefaultAxes();
     QDateTimeAxis *axisX = new QDateTimeAxis;
-    axisX->setTicksCount(20);
-    momentInTime.setDate(QDate(2012,1,1));
-    momentInTime.setTime(QTime(6, 0));
-    axisX->setMin(momentInTime);
-    momentInTime.setDate(QDate(2012,1,7));
-    momentInTime.setTime(QTime(18, 0));
-    axisX->setMax(momentInTime);
+//    axisX->setTicksCount(10);
     chart->setAxisX(axisX, series);
     chart->setTitle("Date and Time axis chart example");
     //![3]
diff --git a/src/piechart/qpieseries.cpp b/src/piechart/qpieseries.cpp
index eca6a06..150718d 100644
--- a/src/piechart/qpieseries.cpp
+++ b/src/piechart/qpieseries.cpp
@@ -132,6 +132,8 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
     \o 1.0 is the maximum size that can fit the chart.
     \endlist
 
+    When setting this property the donutInnerSize property is adjusted if necessary, to ensure that the inner size is not greater than the outer size.
+
     Default value is 0.7.
 */
 
@@ -177,7 +179,8 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
     \o 1.0 is the maximum size that can fit the chart. (donut has no width)
     \endlist
 
-    The value is never greater then size property.
+    When setting this property the size property is adjusted if necessary, to ensure that the inner size is not greater than the outer size.
+
     Default value is 0.5.
 */
 
@@ -582,15 +585,8 @@ bool QPieSeries::donut() const
 void QPieSeries::setDonutInnerSize(qreal innerSize)
 {
     Q_D(QPieSeries);
-
-    if (innerSize < 0.0)
-        innerSize = 0.0;
-    if (innerSize > d->m_pieRelativeSize)
-        innerSize = d->m_pieRelativeSize;
-
-    d->m_donutRelativeInnerSize = innerSize;
-    d->updateDerivativeData();
-    emit d->pieSizeChanged();
+    innerSize = qBound(0.0, innerSize, 1.0);
+    d->setSizes(innerSize, qMax(d->m_pieRelativeSize, innerSize));
 }
 
 qreal QPieSeries::donutInnerSize() const
@@ -644,16 +640,9 @@ qreal QPieSeries::verticalPosition() const
 void QPieSeries::setPieSize(qreal relativeSize)
 {
     Q_D(QPieSeries);
+    relativeSize = qBound(0.0, relativeSize, 1.0);
+    d->setSizes(qMin(d->m_donutRelativeInnerSize, relativeSize), relativeSize);
 
-    if (relativeSize < 0.0)
-        relativeSize = 0.0;
-    if (relativeSize > 1.0)
-        relativeSize = 1.0;
-
-    if (!qFuzzyIsNull(d->m_pieRelativeSize - relativeSize)) {
-        d->m_pieRelativeSize = relativeSize;
-        emit d->pieSizeChanged();
-    }
 }
 
 qreal QPieSeries::pieSize() const
@@ -785,6 +774,24 @@ void QPieSeriesPrivate::updateDerivativeData()
     emit calculatedDataChanged();
 }
 
+void QPieSeriesPrivate::setSizes(qreal innerSize, qreal outerSize)
+{
+    bool changed = false;
+
+    if (!qFuzzyIsNull(m_donutRelativeInnerSize - innerSize)) {
+        m_donutRelativeInnerSize = innerSize;
+        changed = true;
+    }
+
+    if (!qFuzzyIsNull(m_pieRelativeSize - outerSize)) {
+        m_pieRelativeSize = outerSize;
+        changed = true;
+    }
+
+    if (changed)
+        emit pieSizeChanged();
+}
+
 QPieSeriesPrivate* QPieSeriesPrivate::fromSeries(QPieSeries *series)
 {
     return series->d_func();
diff --git a/src/piechart/qpieseries_p.h b/src/piechart/qpieseries_p.h
index 479b07d..eb2316a 100644
--- a/src/piechart/qpieseries_p.h
+++ b/src/piechart/qpieseries_p.h
@@ -51,6 +51,7 @@ public:
     QAbstractAxis::AxisType defaultAxisType(Qt::Orientation orientation) const;
 
     void updateDerivativeData();
+    void setSizes(qreal innerSize, qreal outerSize);
 
     static QPieSeriesPrivate* fromSeries(QPieSeries *series);
 
diff --git a/src/piechart/qpieslice.h b/src/piechart/qpieslice.h
index e579006..b5293b2 100644
--- a/src/piechart/qpieslice.h
+++ b/src/piechart/qpieslice.h
@@ -58,8 +58,8 @@ public:
     enum LabelPosition {
         LabelOutside,
         LabelInside,
-        LabelInsideTangential,
-        LabelInsideNormal
+        LabelInsideTangential, // better name needed
+        LabelInsideNormal // better name needed
     };
 
 public: