- Qt 5.5
- Qt Widgets
- Interview
- model.h Example File
- Qt 5.5.1 Reference Documentation

# model.h Example File

itemviews/interview/model.h

    /****************************************************************************
    **
    ** Copyright (C) 2015 The Qt Company Ltd.
    ** Contact: http://www.qt.io/licensing/
    **
    ** This file is part of the demonstration applications of the Qt Toolkit.
    **
    ** $QT_BEGIN_LICENSE:LGPL21$
    ** Commercial License Usage
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    ** GNU Lesser General Public License Usage
    ** Alternatively, this file may be used under the terms of the GNU Lesser
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    ** LICENSE.LGPLv3 included in the packaging of this file. Please review the
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    #ifndef MODEL_H
    #define MODEL_H

    #include <QAbstractItemModel>
    #include <QFileIconProvider>
    #include <QIcon>
    #include <QVector>

    class Model : public QAbstractItemModel
    {
        Q_OBJECT

    public:
        Model(int rows, int columns, QObject *parent = 0);
        ~Model();

        QModelIndex index(int row, int column, const QModelIndex &parent) const Q_DECL_OVERRIDE;
        QModelIndex parent(const QModelIndex &child) const Q_DECL_OVERRIDE;

        int rowCount(const QModelIndex &parent) const Q_DECL_OVERRIDE;
        int columnCount(const QModelIndex &parent) const Q_DECL_OVERRIDE;

        QVariant data(const QModelIndex &index, int role) const Q_DECL_OVERRIDE;
        QVariant headerData(int section, Qt::Orientation orientation, int role) const Q_DECL_OVERRIDE;

        bool hasChildren(const QModelIndex &parent) const Q_DECL_OVERRIDE;
        Qt::ItemFlags flags(const QModelIndex &index) const Q_DECL_OVERRIDE;

    private:

        struct Node
        {
            Node(Node *parent = 0) : parent(parent), children(0) {}
            ~Node() { delete children; }
            Node *parent;
            QVector<Node> *children;
        };

        Node *node(int row, Node *parent) const;
        Node *parent(Node *child) const;
        int row(Node *node) const;

        QIcon services;
        int rc;
        int cc;
        QVector<Node> *tree;
        QFileIconProvider iconProvider;
    };

    #endif // MODEL_H