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3** Copyright (C) 2016 The Qt Company Ltd.
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29
30// W A R N I N G
31// -------------
32//
33// This file is not part of the Qt Chart API. It exists purely as an
34// implementation detail. This header file may change from version to
35// version without notice, or even be removed.
36//
37// We mean it.
38
39#ifndef QPIEMODELMAPPER_P_H
40#define QPIEMODELMAPPER_P_H
41
42#include <QtCore/QObject>
43#include <QtCharts/QPieModelMapper>
44#include <QtCharts/private/qchartglobal_p.h>
45
46QT_BEGIN_NAMESPACE
47class QModelIndex;
48QT_END_NAMESPACE
49
50QT_CHARTS_BEGIN_NAMESPACE
51
52class QPieSlice;
53
54class Q_CHARTS_PRIVATE_EXPORT QPieModelMapperPrivate : public QObject
55{
56 Q_OBJECT
57
58public:
59 explicit QPieModelMapperPrivate(QPieModelMapper *q);
60
61public Q_SLOTS:
62 // for the model
63 void modelUpdated(QModelIndex topLeft, QModelIndex bottomRight);
64 void modelRowsAdded(QModelIndex parent, int start, int end);
65 void modelRowsRemoved(QModelIndex parent, int start, int end);
66 void modelColumnsAdded(QModelIndex parent, int start, int end);
67 void modelColumnsRemoved(QModelIndex parent, int start, int end);
68 void handleModelDestroyed();
69
70 // for the series
71 void slicesAdded(QList<QPieSlice *> slices);
72 void slicesRemoved(QList<QPieSlice *> slices);
73 void sliceLabelChanged();
74 void sliceValueChanged();
75 void handleSeriesDestroyed();
76
77 void initializePieFromModel();
78
79private:
80 QPieSlice *pieSlice(QModelIndex index) const;
81 bool isLabelIndex(QModelIndex index) const;
82 bool isValueIndex(QModelIndex index) const;
83 QModelIndex valueModelIndex(int slicePos);
84 QModelIndex labelModelIndex(int slicePos);
85 void insertData(int start, int end);
86 void removeData(int start, int end);
87
88 void blockModelSignals(bool block = true);
89 void blockSeriesSignals(bool block = true);
90
91private:
92 QPieSeries *m_series;
93 QList<QPieSlice *> m_slices;
94 QAbstractItemModel *m_model;
95 int m_first;
96 int m_count;
97 Qt::Orientation m_orientation;
98 int m_valuesSection;
99 int m_labelsSection;
100 bool m_seriesSignalsBlock;
101 bool m_modelSignalsBlock;
102
103private:
104
105 QPieModelMapper *q_ptr;
106 Q_DECLARE_PUBLIC(QPieModelMapper)
107};
108
109QT_CHARTS_END_NAMESPACE
110
111#endif // QPIEMODELMAPPER_P_H
112

source code of qtcharts/src/charts/piechart/qpiemodelmapper_p.h