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29 
30 #ifndef VARIANTBARDATAPROXY_H
31 #define VARIANTBARDATAPROXY_H
32 
33 #include "qbardataproxy.h"
34 #include "variantdataset.h"
35 #include "variantbardatamapping.h"
36 #include <QtCore/QStringList>
37 #include <QtCore/QMap>
38 #include <QtCore/QPointer>
39 
40 using namespace QtDataVisualization;
41 
42 //! [0]
43 class VariantBarDataProxy : public QBarDataProxy
44 //! [0]
45 {
46     Q_OBJECT
47 
48 public:
49     explicit VariantBarDataProxy();
50     explicit VariantBarDataProxy(VariantDataSet *newSet, VariantBarDataMapping *mapping);
51     virtual ~VariantBarDataProxy();
52 
53     //! [1]
54     // Doesn't gain ownership of the dataset, but does connect to it to listen for data changes.
55     void setDataSet(VariantDataSet *newSet);
56     VariantDataSet *dataSet();
57 
58     // Map key (row, column, value) to value index in data item (VariantItem).
59     // Doesn't gain ownership of mapping, but does connect to it to listen for mapping changes.
60     // Modifying mapping that is set to proxy will trigger dataset re-resolving.
61     void setMapping(VariantBarDataMapping *mapping);
62     VariantBarDataMapping *mapping();
63     //! [1]
64 
65 public Q_SLOTS:
66     void handleItemsAdded(int index, int count);
67     void handleDataCleared();
68     void handleMappingChanged();
69 
70 private:
71     void resolveDataSet();
72 
73     QPointer<VariantDataSet> m_dataSet;
74     QPointer<VariantBarDataMapping> m_mapping;
75 
76     Q_DISABLE_COPY(VariantBarDataProxy)
77 };
78 
79 #endif
80