app.hpp Example File

databasecrud/src/app.hpp
    /* 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 APP_HPP
    #define APP_HPP

    #include <bb/cascades/GroupDataModel>

    using namespace bb::cascades;

    /*
     * @brief Declaration of our application's class (as opposed to the BB Cascades
     *  application class that contains our application).
     */
    class App: public QObject
    {
        // Classes that inherit from QObject must have the Q_OBJECT macro so
        // the meta-object compiler (MOC) can add supporting code to the application.
        Q_OBJECT

        // A property that is used by the list view in QML
        Q_PROPERTY(bb::cascades::DataModel* dataModel READ dataModel CONSTANT)

    public:
        App();

        // "Q_INVOKABLE" allows these functions to be called from main.qml
        Q_INVOKABLE bool createRecord(const QString &firstName, const QString &lastName);
        Q_INVOKABLE void readRecords();
        Q_INVOKABLE bool updateRecord(const QString &key, const QString &firstName, const QString &lastName);
        Q_INVOKABLE bool deleteRecord(const QString &key);

    private:
        // Functions to call upon initialization to setup the model and database
        void initDataModel();
        bool initDatabase();

        // To alert the user if something has gone wrong
        void alert(const QString &message);

        // The getter method for the property
        bb::cascades::GroupDataModel* dataModel() const;

        // The data shown by the list view.
        GroupDataModel* m_dataModel;
    };

    #endif