BarcodeScannerApp.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 "BarcodeScannerApp.hpp"

    #include <bb/cascades/Application>
    #include <bb/multimedia/MediaPlayer.hpp>
    #include <bb/system/ApplicationStartupMode>
    #include <bb/system/CardDoneMessage.hpp>
    #include <bb/system/InvokeManager>
    #include <bb/system/InvokeRequest>

    #include <zxing/MultiFormatReader.h>
    #include <zxing/common/GreyscaleLuminanceSource.h>
    #include <zxing/common/HybridBinarizer.h>

    #include <exception>

    using namespace bb::multimedia;
    using namespace bb::system;

    BarcodeScannerApp::BarcodeScannerApp(QObject* parent)
        : QObject(parent)
        , m_invokeManager(new InvokeManager(this))
        , m_invoked(false)
        , m_pooled(false)
        , m_player(new MediaPlayer(this))
    {
        m_player->setSourceUrl(QDir::currentPath() + "/app/native/assets/sounds/boopdoop.mp3");

        bool ok = connect(m_invokeManager, SIGNAL(invoked(const bb::system::InvokeRequest&)),
                          this, SLOT(onInvoked(const bb::system::InvokeRequest&)));
        Q_ASSERT(ok);

        ok = connect(m_invokeManager, SIGNAL(cardPooled(const bb::system::CardDoneMessage&)),
                     this, SLOT(onCardPooled(const bb::system::CardDoneMessage&)));
        Q_ASSERT(ok);

        switch (m_invokeManager->startupMode()) {
            case ApplicationStartupMode::LaunchApplication:
                m_invoked = false;
                break;
            case ApplicationStartupMode::InvokeApplication:
            case ApplicationStartupMode::InvokeCard:
                m_invoked = true;
                break;
            default:
                break;
        }

        qDebug() << "+++++++++ Application invoked: " << m_invoked << endl;
    }

    void BarcodeScannerApp::newBarcodeDetected(const QString &barcode)
    {
        m_player->play();

        if (m_invoked) {
            CardDoneMessage message;
            message.setData(barcode);
            message.setDataType("text/plain");
            message.setReason("Barcode scanned!");
            m_invokeManager->sendCardDone(message);
        }
    }

    void BarcodeScannerApp::onCardPooled(const bb::system::CardDoneMessage&)
    {
        m_pooled = true;
        Q_EMIT stopScan();
    }

    void BarcodeScannerApp::onInvoked(const bb::system::InvokeRequest&)
    {
        if (m_pooled)
            Q_EMIT startScan();
    }