pageddatamodel.cpp 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.
     */

    #include "pageddatamodel.hpp"

    PagedDataModel::PagedDataModel(QObject *parent)
    {
        // Workaround since QVariantListDataModel is missing the parent parameter in constructor
        setParent(parent);

        // Fill the model initially with values '0' to '19'
        for (int row = 0; row < 20; ++row) {
            append(QString::number(row));
        }

        // Add the marker item to request more items
        append(tr("Click for more..."));
    }

    void PagedDataModel::addItemsAt(const QVariantList &indexPath)
    {
        // Check whether the index path is valid
        if (indexPath.size() != 1)
            return;

        // Retrieve position of marker in list
        const int position = indexPath[0].toInt();

        // Remove the marker
        removeAt(position);

        // Append the new items
        for (int row = position; row < (position + 10); ++row) {
            append(QString::number(row));
        }

        // Add a new marker item to request more items
        append(tr("Click for more..."));

        emit itemCountChanged();
    }

    int PagedDataModel::itemCount() const
    {
        return (size() - 1);
    }