diff --git a/examples/tablemodelchart/tablewidget.cpp b/examples/tablemodelchart/tablewidget.cpp
index 4b12fb8..d95943f 100644
--- a/examples/tablemodelchart/tablewidget.cpp
+++ b/examples/tablemodelchart/tablewidget.cpp
@@ -194,7 +194,7 @@ void TableWidget::updateChartType()
         // pie 1
         QPieSeries* pieSeries = new QPieSeries;
         pieSeries->setModel(m_model);
-        pieSeries->setModelMapping(0,0, Qt::Horizontal);
+        pieSeries->setModelMapping(0,0, Qt::Vertical);
         pieSeries->setLabelsVisible(true);
         pieSeries->setPieSize(0.4);
         pieSeries->setPiePosition(0.2, 0.35);
@@ -203,7 +203,7 @@ void TableWidget::updateChartType()
         // pie 2
         pieSeries = new QPieSeries;
         pieSeries->setModel(m_model);
-        pieSeries->setModelMapping(1,1, Qt::Horizontal);
+        pieSeries->setModelMapping(1,1, Qt::Vertical);
         pieSeries->setLabelsVisible(true);
         pieSeries->setPieSize(0.4);
         pieSeries->setPiePosition(0.8, 0.35);
@@ -212,7 +212,7 @@ void TableWidget::updateChartType()
         // pie 3
         pieSeries = new QPieSeries;
         pieSeries->setModel(m_model);
-        pieSeries->setModelMapping(2,2, Qt::Horizontal);
+        pieSeries->setModelMapping(2,2, Qt::Vertical);
         pieSeries->setLabelsVisible(true);
         pieSeries->setPieSize(0.4);
         pieSeries->setPiePosition(0.5, 0.65);
diff --git a/src/barchart/barpresenter.cpp b/src/barchart/barpresenter.cpp
index 83018bb..661a332 100644
--- a/src/barchart/barpresenter.cpp
+++ b/src/barchart/barpresenter.cpp
@@ -8,7 +8,8 @@ QTCOMMERCIALCHART_BEGIN_NAMESPACE
 
 BarPresenter::BarPresenter(QBarSeries *series, QChart *parent) :
     BarPresenterBase(series, parent)
-{
+{    
+    connect(series, SIGNAL(updatedBars()), this, SLOT(layoutChanged()));
 }
 
 void BarPresenter::layoutChanged()
@@ -78,6 +79,7 @@ void BarPresenter::layoutChanged()
             xPos += mBarWidth;
         }
     }
+    update();
 }
 
 #include "moc_barpresenter_p.cpp"
diff --git a/src/barchart/barpresenterbase_p.h b/src/barchart/barpresenterbase_p.h
index 636916f..c21dc1e 100644
--- a/src/barchart/barpresenterbase_p.h
+++ b/src/barchart/barpresenterbase_p.h
@@ -30,6 +30,7 @@ public:
 
     // TODO: Consider the domain for layoutChanged. May be use case, may not be. If it is, then the derived classes need to implement it
     virtual void dataChanged();     // data of series has changed -> need to recalculate bar sizes
+private slots:
     virtual void layoutChanged() = 0;   // layout has changed -> need to recalculate bar sizes
 
 protected:
diff --git a/src/barchart/qbarseries.cpp b/src/barchart/qbarseries.cpp
index 94d054d..b6460f8 100644
--- a/src/barchart/qbarseries.cpp
+++ b/src/barchart/qbarseries.cpp
@@ -54,7 +54,7 @@ void QBarSeries::addBarSet(QBarSet *set)
     mModel->addBarSet(set);
     connect(set,SIGNAL(clicked(QString)),this,SLOT(barsetClicked(QString)));
     connect(set,SIGNAL(rightClicked(QString)),this,SLOT(barsetRightClicked(QString)));
-    connect(set, SIGNAL(changed()), this, SLOT(barsetChanged()));
+    connect(set, SIGNAL(valueChanged()), this, SLOT(barsetChanged()));
 }
 
 /*!
@@ -323,7 +323,7 @@ void QBarSeries::modelDataRemoved(QModelIndex /*parent*/, int /*start*/, int /*e
 
 void QBarSeries::barsetChanged()
 {
-//    mModel->
+    emit updatedBars();
 }
 
 #include "moc_qbarseries.cpp"
diff --git a/src/barchart/qbarseries.h b/src/barchart/qbarseries.h
index 7d321cb..f4cdebd 100644
--- a/src/barchart/qbarseries.h
+++ b/src/barchart/qbarseries.h
@@ -49,6 +49,9 @@ signals:
     void clicked(QBarSet* barset, QString category);        // Up to user of api, what to do with these signals
     void rightClicked(QBarSet* barset, QString category);
 
+    //
+    void updatedBars();
+
     // TODO: internal signals, these to private implementation.
     // TODO: TO PIMPL --->
     void showToolTip(QPoint pos, QString tip);
@@ -72,7 +75,7 @@ private Q_SLOTS:
 protected:
     BarChartModel* mModel;
 
-    QAbstractItemModel* m_model;
+//    QAbstractItemModel* m_model;
     int m_mapCategories;
     int m_mapBarBottom;
     int m_mapBarTop;
diff --git a/src/barchart/qbarset.cpp b/src/barchart/qbarset.cpp
index fa088c9..d98de32 100644
--- a/src/barchart/qbarset.cpp
+++ b/src/barchart/qbarset.cpp
@@ -82,6 +82,7 @@ QString QBarSet::name()
 QBarSet& QBarSet::operator << (const qreal &value)
 {
     mValues.append(value);
+    emit structureChanged();
     return *this;
 }
 
@@ -107,7 +108,7 @@ qreal QBarSet::valueAt(int index)
 void QBarSet::setValue(int index, qreal value)
 {
     mValues.replace(index,value);
-    emit changed();
+    emit valueChanged();
 }
 
 /*!
@@ -128,7 +129,7 @@ qreal QBarSet::total()
 void QBarSet::setPen(const QPen pen)
 {
     mPen = pen;
-    emit changed();
+    emit valueChanged();
 }
 
 /*!
@@ -145,7 +146,7 @@ QPen QBarSet::pen() const
 void QBarSet::setBrush(const QBrush brush)
 {
     mBrush = brush;
-    emit changed();
+    emit valueChanged();
 }
 
 /*!
diff --git a/src/barchart/qbarset.h b/src/barchart/qbarset.h
index 9ea805b..5c1ef93 100644
--- a/src/barchart/qbarset.h
+++ b/src/barchart/qbarset.h
@@ -43,7 +43,8 @@ Q_SIGNALS:
 
     // TODO: Expose this to user or not?
     // TODO: TO PIMPL --->
-    void changed();
+    void structureChanged();
+    void valueChanged();
     void hoverEnter(QPoint pos);
     void hoverLeave();
     void showToolTip(QPoint pos, QString tip);  // Private signal