PizzeriaSearcher.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 "PizzeriaSearcher.hpp"

    using namespace bb::cascades;
    using namespace bb::data;

    static QUrl assembleSearchUrl(const QString &zipCode)
    {
        QUrl url;

        // Configure the REST access point
        url.setScheme(QLatin1String("http"));
        url.setHost(QLatin1String("local.yahooapis.com"));
        url.setPath(QLatin1String("/LocalSearchService/V3/localSearch"));

        // This appid is reserved for this example application. Using it for something else will result in bad karma!
        url.addQueryItem(QLatin1String("appid"), QLatin1String("H.A4m8fV34HyNuOXZKbEnrjRDfMQJhA65jnhTej8vPBMWFzN0Kya5LgpRtXoNQ--"));

        // We search for pizzerias ...
        url.addQueryItem(QLatin1String("query"), QLatin1String("pizza"));

        // ... in the given region ...
        url.addQueryItem(QLatin1String("zip"), zipCode);

        // ... and limit the results to 10.
        url.addQueryItem(QLatin1String("results"), QLatin1String("10"));

        return url;
    }

    PizzeriaSearcher::PizzeriaSearcher(QObject *parent)
        : QObject(parent)
        , m_model(new GroupDataModel(this))
        , m_dataSource(new DataSource(this))
    {
        // Disable item grouping in the data model
        m_model->setGrouping(ItemGrouping::None);

        // Set the XPath expression to extract the result items from the XML document
        m_dataSource->setQuery(QLatin1String("/ResultSet/Result"));

        // Invoke out dataLoaded slot whenever the data source has loaded and parsed the XML document
        bool ok = connect(m_dataSource, SIGNAL(dataLoaded(QVariant)), this, SLOT(dataLoaded(QVariant)));
        Q_ASSERT(ok);
        Q_UNUSED(ok);
    }

    void PizzeriaSearcher::dataLoaded(const QVariant &data)
    {
        // Clear the model ...
        m_model->clear();

        // ... and fill it with the search result data
        m_model->insertList(data.toList());
    }

    GroupDataModel* PizzeriaSearcher::model() const
    {
        return m_model;
    }

    QString PizzeriaSearcher::zipCode() const
    {
        return m_zipCode;
    }

    void PizzeriaSearcher::setZipCode(const QString &zipCode)
    {
        if (m_zipCode == zipCode)
            return;

        m_zipCode = zipCode;
        emit zipCodeChanged();

        m_dataSource->setSource(assembleSearchUrl(m_zipCode));
        m_dataSource->load();
    }