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50 
51 //! [0]
52 beginInsertRows(parent, 2, 4);
53 //! [0]
54 
55 
56 //! [1]
57 beginInsertRows(parent, 4, 5);
58 //! [1]
59 
60 
61 //! [2]
62 beginRemoveRows(parent, 2, 3);
63 //! [2]
64 
65 
66 //! [3]
67 beginInsertColumns(parent, 4, 6);
68 //! [3]
69 
70 
71 //! [4]
72 beginInsertColumns(parent, 6, 8);
73 //! [4]
74 
75 
76 //! [5]
77 beginRemoveColumns(parent, 4, 6);
78 //! [5]
79 
80 
81 //! [6]
82 beginMoveRows(sourceParent, 2, 4, destinationParent, 2);
83 //! [6]
84 
85 
86 //! [7]
87 beginMoveRows(sourceParent, 2, 4, destinationParent, 6);
88 //! [7]
89 
90 
91 //! [8]
92 beginMoveRows(parent, 2, 2, parent, 0);
93 //! [8]
94 
95 
96 //! [9]
97 beginMoveRows(parent, 2, 2, parent, 4);
98 //! [9]
99 
100 //! [10]
101 myData.clear();
102 reset();
103 //! [10]
104 
105 //! [11]
106 beginResetModel();
107 myData.clear();
108 endResetModel();
109 //! [11]
110 
111 //! [12]
112 class CustomDataProxy : public QSortFilterProxyModel
113 {
114     Q_OBJECT
115 public:
CustomDataProxy(QObject * parent)116     CustomDataProxy(QObject *parent)
117       : QSortFilterProxyModel(parent)
118     {
119     }
120 
121     ...
122 
123     QVariant data(const QModelIndex &index, int role) override
124     {
125         if (role != Qt::BackgroundRole)
126             return QSortFilterProxyModel::data(index, role);
127 
128         if (m_customData.contains(index.row()))
129             return m_customData.value(index.row());
130         return QSortFilterProxyModel::data(index, role);
131     }
132 
133 private slots:
resetInternalData()134     void resetInternalData()
135     {
136         m_customData.clear();
137     }
138 
139 private:
140   QHash<int, QVariant> m_customData;
141 };
142 //! [12]
143 
144