variantbardataproxy.h Example File

customproxy/variantbardataproxy.h
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 #ifndef VARIANTBARDATAPROXY_H
 #define VARIANTBARDATAPROXY_H

 #include "qbardataproxy.h"
 #include "variantdataset.h"
 #include "variantbardatamapping.h"
 #include <QtCore/QStringList>
 #include <QtCore/QMap>
 #include <QtCore/QPointer>

 using namespace QtDataVisualization;

 class VariantBarDataProxy : public QBarDataProxy
 {
     Q_OBJECT

 public:
     explicit VariantBarDataProxy();
     explicit VariantBarDataProxy(VariantDataSet *newSet, VariantBarDataMapping *mapping);
     virtual ~VariantBarDataProxy();

     // Doesn't gain ownership of the dataset, but does connect to it to listen for data changes.
     void setDataSet(VariantDataSet *newSet);
     VariantDataSet *dataSet();

     // Map key (row, column, value) to value index in data item (VariantItem).
     // Doesn't gain ownership of mapping, but does connect to it to listen for mapping changes.
     // Modifying mapping that is set to proxy will trigger dataset re-resolving.
     void setMapping(VariantBarDataMapping *mapping);
     VariantBarDataMapping *mapping();

 public Q_SLOTS:
     void handleItemsAdded(int index, int count);
     void handleDataCleared();
     void handleMappingChanged();

 private:
     void resolveDataSet();

     QPointer<VariantDataSet> m_dataSet;
     QPointer<VariantBarDataMapping> m_mapping;

     Q_DISABLE_COPY(VariantBarDataProxy)
 };

 #endif