variantbardataproxy.h Example File

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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