The Mobility ProjectAlex 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