CodecController.hpp Example File

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    #ifndef CODECCONTROLLER_HPP
    #define CODECCONTROLLER_HPP

    #include <bb/cascades/DropDown>

    #include <QtCore/QObject>
    #include <QtCore/QPointer>

    /**
     * The CodecController class contains all the business logic of this application.
     * It fills the file and codec DropDown lists (which are set from within the UI)
     * and updated the decoded file content that will be shown in the UI.
     */
    class CodecController : public QObject
    {
        Q_OBJECT

        /**
         * These two properties are used to define the file and codec DropDown lists from within the UI
         */
        Q_PROPERTY(bb::cascades::DropDown* fileList READ fileList WRITE setFileList NOTIFY fileListChanged)
        Q_PROPERTY(bb::cascades::DropDown* codecList READ codecList WRITE setCodecList NOTIFY codecListChanged)

        // The property that makes the decoded file content available to the UI
        Q_PROPERTY(QString fileContent READ fileContent NOTIFY fileContentChanged)

    public:
        CodecController(QObject *parent = 0);

        // The accessor methods for the properties
        void setFileList(bb::cascades::DropDown *fileList);
        bb::cascades::DropDown* fileList() const;

        void setCodecList(bb::cascades::DropDown *codecList);
        bb::cascades::DropDown* codecList() const;

        QString fileContent() const;

    public Q_SLOTS:
        // This method is called whenever the user changes the selection in the file or codec list
        void updateFileContent();

    Q_SIGNALS:
        // The change notification signals for the properties
        void fileListChanged();
        void codecListChanged();
        void fileContentChanged();

    private:
        // This method fills the file DropDown with the available example files
        void fillFileList();

        // This method fills the codec DropDown with available codecs of the system
        void fillCodecList();

        // The DropDown object for the file list
        QPointer<bb::cascades::DropDown> m_fileList;

        // The DropDown object for the codec list
        QPointer<bb::cascades::DropDown> m_codecList;

        // The decoded content of the currently selected file
        QString m_fileContent;
    };

    #endif