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The Mobility Project
 

The Mobility Project

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The Qt Mobility project is developing new Qt APIs. These APIs will benefit all Qt developers. This presentation shall provide an overview of the APIs and demonstrate the use of some the APIs through ...

The Qt Mobility project is developing new Qt APIs. These APIs will benefit all Qt developers. This presentation shall provide an overview of the APIs and demonstrate the use of some the APIs through an example application. This presentation shall fuel ideas for usage of the new APIs in your own projects.

Presentation by Alex Luddy held during Qt Developer Days 2009.

http://qt.nokia.com/developer/learning/elearning

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    The Mobility Project The Mobility Project Presentation Transcript

    • The Mobility Project Alex Luddy
    • Purpose • Fuel your ideas for using the Qt APIs from the Mobility project 1
    • Agenda • Background • Content Overview – Some examples • Questions 2
    • Traditional Qt 3
    • Qt Going Forward 4
    • Mobility Project 5
    • Mobility and Applications 6
    • Qt Mobility Details • The Mobility project is creating Qt APIs • APIs will have supported functional back-ends on all platforms where it makes sense • Some APIs on Qt labs now 7
    • The Story of Bob the Developer • Wants to make a mobile application • Wants the application to be cross-platform • A Web feed reader… 8
    • Bearer Management • Enables roaming between connections • Choose most appropriate connection • Manage connections 9
    • Bearer Management 10
    • Bearer Management Demo 11
    • Bearer Management Example class BearerCloud : public QGraphicsScene { // ... QNetworkConfigurationManager manager; }; 12
    • Bearer Management Example connect(&manager, SIGNAL(configurationAdded(QNetworkConfiguration)), this, SLOT(configurationAdded(QNetworkConfiguration))); connect(&manager, SIGNAL(configurationUpdated(QNetworkConfiguration)), this, SLOT(configurationUpdated(QNetworkConfiguration))); 13
    • Bearer Management Example void BearerCloud::configurationAdded( const QNetworkConfiguration& configuration) { const QNetworkConfiguration::StateFlags state = config.state(); // position in cloud based on state } 14
    • Back to Bob • Efficient Internet connection • Web feed reader with contact interest information… 15
    • Contacts • Work with contact data • Add custom data • Introspect contact data • Enumerate contact stores – Local and remote 16
    • Contacts 17
    • Contacts Example: Show Contacts // prepare fetch request QContactManager* manager = new QContactManager(); QContactFetchRequest* fetchRequest = new QContactFetchRequest; fetchRequest->setManager(manager); connect(fetchRequest, SIGNAL(progress(QContactFetchRequest*,bool)), this, SLOT(showContacts(QContactFetchRequest*,bool))); m_fetchRequest->start() 18
    • Contacts Example: Show Contacts void Example::showContacts(QContactFetchRequest* request, bool appendOnly) { QList<QContact> results = request->contacts(); // handle append only case // access contacts for display for (int i = 0; i < results.size(); ++i) { QString display = results[i].displayLabel().label(); // ... 19
    • Back to Bob • Efficient Internet connection • Access contact details – Add “interest” as custom data • Web feed reader that can send messages to contacts about relevant information.. 20
    • Messaging • Send (Email, SMS, MMS) • Work with stored/remote messages • Access message accounts • New message notifications • Retrieve 21
    • Messaging 22
    • Messaging Example: Send Message // get to address QString to = contact.detail<QContactEmailAddress>().emailAddress(); // prepare message QMessage message; message.setType(QMessage::Email); message.setTo(QMessageAddress(to, QMessageAddress::Email)); message.setSubject(“Boating”); message.setBody(“Here is a link you might like...”); 23
    • Messaging Example: Send Message // send QMessageServiceAction service; connect(&service, SIGNAL(stateChanged(QMessageServiceAction::State)), this, SLOT(stateChanged(QMessageServiceAction::State))); service.sendMessage(message); // check send result void MessageSender::stateChanged( QMessageServiceAction::State state) { if (state == QMessageServiceAction::Successful) // all good 24
    • Back to Bob • Efficient Internet connection • Access contact details • Send messages to contacts • The “I am going to be late” application… 25
    • Location • Where am I? – Stream location data • Be notified when within range of a location • Underlying location technology agnostic 26
    • Location 27
    • Location Demo 28
    • Location Example // create source source = new QNmeaPositionInfoSource( QNmeaPositionInfoSource::SimulationMode, this); // open NMEA data file and set as device for source source->setUpdateInterval(1500); connect(source, SIGNAL(positionUpdated(QGeoPositionInfo)), this, SLOT(positionUpdated(QGeoPositionInfo))); 29
    • Location Example void MapWindow::positionUpdated(const QGeoPositionInfo& info) { if (info.hasProperty(QGeoPositionInfo::Heading)) // ... QString url = /* ... */ .arg(QString::number( info.coordinate().latitude())) // ... 30
    • Back to Bob • Efficient use of network • Accessing contact details • Sending messages to contacts • Knows where user is 31
    • Other APIs for Application Developers • Multimedia • System Information • Calendar (coming next year) • Sensors (coming next year) • More to come… 32
    • System Developer APIs • Use case is focused more on development of a system rather than an application • Publish and subscribe • Service framework 33
    • Publish and Subscribe • Unifies various sources of hierarchical data into a single consistent model • Uses QVariant /Device/Buttons = 3 /Device/Buttons/1/Name = Context /Device/Buttons/1/Usable = true /Device/Buttons/2/Name = Select 34
    • Service Framework • Discover and work with services • Central service registry • XML definition • Out-of-process support coming next year 35
    • Service Framework 36
    • Content Summary • Bearer Management, Contacts, Messaging, Location, Multimedia, System Information, Publish and Subscribe, Service Framework • … 37
    • Summary • Rich cross-platform applications • Qt brilliant developer offering everywhere 38
    • Questions • http://labs.qt.nokia.com/page/Projects/QtMobility • All API feedback appreciated 39