filtereddatamodel.hpp Example File

    /* Copyright (c) 2012, 2013  BlackBerry Limited.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
    * distributed under the License is distributed on an "AS IS" BASIS,
    * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    * See the License for the specific language governing permissions and
    * limitations under the License.
    */

    #ifndef FILTEREDDATAMODEL_HPP
    #define FILTEREDDATAMODEL_HPP

    #include <bb/cascades/DataModel>

    class FilteredDataModel : public bb::cascades::DataModel
    {
    public:
        FilteredDataModel(bb::cascades::DataModel *sourceModel, QObject *parent = 0);

        // Required interface implementation
        virtual int childCount(const QVariantList& indexPath);
        virtual bool hasChildren(const QVariantList& indexPath);
        virtual QVariant data(const QVariantList& indexPath);
        virtual QString itemType(const QVariantList& indexPath);

        void expandHeader(int headerIndex, bool selected);
        bool isHeaderExpanded(int headerIndex) const;

    private:
        bool isFiltered(const QVariantList& indexPath) const;
        void setExpandedHeader(int headerIndex);

    private:
        bb::cascades::DataModel* m_sourceDataModel;
        int m_expandedIndex;  // currently expanded header by index, or -1 if none expanded
    };

    #endif