radioapp/radiouiengine/inc/radiostationmodel.h
author Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
Fri, 16 Apr 2010 14:58:55 +0300
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Revision: 201011 Kit: 201015
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/*
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* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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*
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*/
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#ifndef RADIOSTATIONMODEL_H_
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#define RADIOSTATIONMODEL_H_
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// System includes
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#include <QAbstractListModel>
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#include <QMap>
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// User includes
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#include "radiouiengineexport.h"
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#include "radiostation.h"
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// Forward declarations
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class RadioStationModelPrivate;
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class RadioPresetStorage;
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class RadioStationHandlerIf;
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class RadioEngineWrapper;
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class RadioUiEngine;
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class RadioStation;
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class QIcon;
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// Constants
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typedef QMap<uint,RadioStation> Stations;
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// Class declaration
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class UI_ENGINE_DLL_EXPORT RadioStationModel : public QAbstractListModel
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{
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    Q_OBJECT
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    Q_DECLARE_PRIVATE_D( d_ptr, RadioStationModel )
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    Q_DISABLE_COPY( RadioStationModel )
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public:
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    enum RadioRole
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    {
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        RadioStationRole = Qt::UserRole + 1,
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        ToggleFavoriteRole
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    };
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    enum DetailFlag
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    {
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        Minimal     = 1 << 0,
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        ShowIcons   = 1 << 1,
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        ShowGenre   = 1 << 2
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    };
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    Q_DECLARE_FLAGS( Detail, DetailFlag )
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    explicit RadioStationModel( RadioUiEngine& uiEngine );
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    ~RadioStationModel();
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// from base class QAbstractListModel
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    Qt::ItemFlags flags ( const QModelIndex& index ) const;
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    int rowCount( const QModelIndex& parent = QModelIndex() ) const;
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    QVariant data( const QModelIndex& index, int role = Qt::DisplayRole ) const;
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    bool setData( const QModelIndex& index, const QVariant& value, int role = Qt::EditRole );
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// New functions
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    /*!
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     * Called by the wrapper to initialize the list with given amount of presets
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     */
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    void initialize( RadioPresetStorage* storage, RadioEngineWrapper* engine );
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    /*!
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     * Sets the icons to be used in the lists
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     */
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    void setIcons( const QIcon& favoriteIcon, const QIcon& nowPlayingIcon );
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    /*!
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     * Returns a reference to the station handler interface
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     */
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    RadioStationHandlerIf& stationHandlerIf();
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    /*!
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     * Returns a reference to the underlying QList so that it can be easily looped
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     */
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    const Stations& list() const;
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    /*!
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     * Returns the station at the given index.
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     * The station is returned by value, but it is cheap because it is implicitly shared
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     */
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    RadioStation stationAt( int index ) const;
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    /*!
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     * Functions to find stations by frequency
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     */
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    bool findFrequency( uint frequency, RadioStation& station );
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    /*!
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     * Functions to find stations by preset index
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     */
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    int findPresetIndex( int presetIndex );
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    int findPresetIndex( int presetIndex, RadioStation& station );
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    /*!
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     * Functions to remove stations
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     */
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    void removeByFrequency( uint frequency );
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    void removeByPresetIndex( int presetIndex );
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    void removeStation( const RadioStation& station );
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    /*!
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     * Functions to add and save stations
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     */
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    void addStation( const RadioStation& station );
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    void saveStation( RadioStation& station );
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    /*!
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     * Convenience functions to change common settings
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     */
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    void setFavoriteByFrequency( uint frequency, bool favorite );
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    void setFavoriteByPreset( int presetIndex, bool favorite );
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    void renameStation( int presetIndex, const QString& name );
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    void setFavorites( const QModelIndexList& favorites );
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    /*!
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     * Functions to init and access the currently tuned station
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     */
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    RadioStation& currentStation();
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    const RadioStation& currentStation() const;
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    /*!
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     * Sets the model detail level
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     */
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    void setDetail( Detail level );
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    /*!
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     * Returns a list of radio stations in the given frequency range
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     */
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    QList<RadioStation> stationsInRange( uint minFrequency, uint maxFrequency );
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    /*!
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     * Returns the model index corresponding to the given frequency
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     */
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    QModelIndex modelIndexFromFrequency( uint frequency );
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signals:
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    void stationDataChanged( const RadioStation& station );
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    void radioTextReceived( const RadioStation& station );
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    void dynamicPsChanged( const RadioStation& station );
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    void favoriteChanged( const RadioStation& station );
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    void stationRemoved( const RadioStation& station );
13
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    void stationAdded( const RadioStation& station );
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public slots:
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    /**
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     * Removes all stations
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     */
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    void removeAll();
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private slots:
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    /*!
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     * Timer timeout slot to indicate that the dynamic PS check has ended
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     */
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    void dynamicPsCheckEnded();
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private:
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// New functions
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    /*!
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     * Checks the given station and emits signals based on what member variables had been changed
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     * since the last save or reset.
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     */
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    void emitChangeSignals( const RadioStation& station, RadioStation::Change flags );
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    void emitDataChanged( const RadioStation& station );
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    /*!
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     * Finds an unused preset index
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     */
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    int findUnusedPresetIndex();
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    /**
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     * Used by the RDS data setters to find the correct station where the data is set
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     * First tries the currentStation variable and if the frequency doesn't match, finds the right one
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     */
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    RadioStation findCurrentStation( uint frequency );
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private: // data
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    /**
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     * Unmodifiable pointer to the private implementation
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     */
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    RadioStationModelPrivate* const d_ptr;
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};
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Q_DECLARE_OPERATORS_FOR_FLAGS( RadioStationModel::Detail )
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#endif // RADIOSTATIONMODEL_H_