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    41 

    42 #ifndef TRACKERCHANGELISTENER_H_

    43 #define TRACKERCHANGELISTENER_H_

    44 

    45 #include <QObject>

    46 #include <QHash>

    47 #include <QSharedPointer>

    48 

    49 #include <QtTracker/QLive>

    50 #include <QtTracker/Tracker>

    51 

    52 #include <qmobilityglobal.h>

    53 #include <qcontact.h>

    54 

    55 QTM_USE_NAMESPACE

    56 

    57 QContactLocalId url2UniqueId(const QString &contactUrl);

    58 

    59 /*!

    60  * Helper class to handle multiple async queries at the same time inside TrackerChangeListener.

    61  * This class is designed to be generic, and initially used to get all contacts that correspond

    62  * to list of IMAccounts. When we get signal that multiple IMAccounts have changed, we read

    63  * all contacts and emit signal contacts changed for them.

    64  *

    65  * Usage: construct AsyncQuery with RDFSelect query. When signal queryReady(AsyncQuery *self)

    66  * is received, read data from rows in self->nodes (self-nodes()->rowCount() ...)

    67  *

    68  * Intention: The class has been created to wrap LiveNodes::modelUpdated signal,

    69  * and to know which query it corresponds to (not possible to fetch it from sender()).

    70  * \sa queryReady(AsyncQuery *)

    71  */

    72 class AsyncQuery: public QObject

    73 {

    74     Q_OBJECT

    75 public:

    76     AsyncQuery(SopranoLive::RDFSelect selectQuery);

    77     SopranoLive::LiveNodes nodes;

    78 

    79 private slots:

    80     void queryReady();

    81 signals:

    82     // emitted when modelUpdated() from LiveNodes related to selectQuery is received

    83     void queryReady(AsyncQuery *self);

    84 };

    85 

    86 /*!

    87  * \class TrackerChangeListener

    88  * \brief Translates signals from tracker and to contact signals

    89  * Listen for tracker signals, computes which contacts are and what si changed and emits

    90  * signals about contact change. Initially designed to compute change signals for

    91  * QContactTrackerEngine

    92  */

    93 class TrackerChangeListener : public QObject

    94 {

    95     Q_OBJECT

    96 public:

    97     TrackerChangeListener(QObject *parent=0);

    98     virtual ~TrackerChangeListener();

    99 

   100 signals:

   101     // signals are with the same semantics as in QContactManagerEngine

   102     void contactsAdded(const QList<QContactLocalId>& contactIds);

   103     void contactsChanged(const QList<QContactLocalId>& contactIds);

   104     void contactsRemoved(const QList<QContactLocalId>& contactIds);

   105 

   106 private slots:

   107     void subjectsAdded(const QStringList &subjects);

   108     void subjectsRemoved(const QStringList &subjects);

   109     void subjectsChanged(const QStringList &subjects);

   110 private:

   111     SopranoLive::BackEnds::Tracker::ClassUpdateSignaler *signaler_contact;

   112     SopranoLive::BackEnds::Tracker::ClassUpdateSignaler *signaler_imaccount;

   113 

   114     void connectSignals(SopranoLive::BackEnds::Tracker::ClassUpdateSignaler *signaler);

   115 

   116     QHash<AsyncQuery*, QSharedPointer<AsyncQuery> > pendingQueries;

   117 };

   118 

   119 

   120 #endif /* TRACKERCHANGELISTENER_H_ */