Meego Italian Day 2011 – Andrea Grandi
Upcoming SlideShare
Loading in...5
×

Like this? Share it with your network

Share

Meego Italian Day 2011 – Andrea Grandi

  • 1,391 views
Uploaded on

Meego Italian Day 2011 – Andrea Grandi - Qt: l’infrastruttura di programmazione multipiattaforma. ...

Meego Italian Day 2011 – Andrea Grandi - Qt: l’infrastruttura di programmazione multipiattaforma.

Panoramica di Qt: libreria multipiattaforma per lo sviluppo di programmi con interfaccia grafica tramite l’uso di widget. Perchè usarla? Quali sono i vantaggi? Che linguaggio di programmazione utilizza? E sotto che licenza viene rilasciata? Insomma, tutto quello che abbiamo sempre voluto sapere su Qt, ma non abbiamo mai osato chiedere. Inoltre qualche nozione teorica su Qt Quick e QML.


Andrea Grandi è studente di Informatica presso l’Università di Firenze e ha lavorato per qualche anno come sviluppatore di software. Dal 2007 fa parte della community di Maemo, in cui si impegna attivamente per aiutare i nuovi utenti, organizzare eventi e sviluppare applicazioni; recentemente è stato eletto membro del Maemo Community Council. Ha iniziato da alcuni anni a lavorare con Qt/C++ per creare programmi destinati ai dispositivi Maemo sino ad accumulare un’esperienza tale da essere nominato Nokia Qt Ambassador. Inoltre è socio fondatore del Pistoia Linux User Group.

http://www.meegoit.com/2011

More in: Technology
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Be the first to comment
    Be the first to like this
No Downloads

Views

Total Views
1,391
On Slideshare
1,265
From Embeds
126
Number of Embeds
2

Actions

Shares
Downloads
7
Comments
0
Likes
0

Embeds 126

http://www.meegoit.com 125
http://translate.googleusercontent.com 1

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
    No notes for slide

Transcript

  • 1. Andreas JaklSenior Technical ConsultantForum Nokia 08 February, 2011 v3.0.2
  • 2. Distribute: Ovi Store ... and get famous and rich! Design, develop & test Choose development technology Qt, Web, Java Select target platform(s) MeeGo, Symbian, Series 40Choose target market(s) for your appEurope, US, Africa, China, India, etc.
  • 3. Java apps Native apps (Qt) Web Apps Web Apps
  • 4. Native appsUse operating system and its functions directly (different code for networking, GPS, etc.) Operating System Symbian, MeeGo, Windows, Mac OS, Linux
  • 5. (if needed, direct access is still possible) Your App Qt framework Same code works on all platforms, covers many usecases (GPS, etc.) Operating SystemSymbian, MeeGo, Windows, Mac OS, Linux
  • 6. Using Qt SDK for – Dev. environment – Testing – Translation Publish to – Help – Ovi Store (Symbian, MeeGo)Developer App Source Code – Windows – Linux Using Qt framework for – Mac – User Interface – Embedded – Networking – Location (GPS) – Web integration – ...
  • 7. • Cross-Platform • Mobile focus – Same source code for multiple platforms – Location, Maps – Maximum performance – native apps! – Sensors• Generic – Messaging (SMS, email) – User Interface – Contacts, Calendar – Declarative UI, animation, gestures, – Camera multi-touch, 3D (OpenGL) – System information – WebKit & JavaScript engine included – Haptics (vibration) – Multimedia (audio, video) • Extend – Networking, XML – Include any 3rd party C++ library / code – SQL, files, app settings – Container classes, object communication, 23 modules, threading, unit testing ~ 800 classes, ~ 9000 functions
  • 8. 4 million DL / day 190+ countries Discussion boards, One-time fee of €1. 103x operator billing e-learning videos, Submit an unlimited number of apps. examplesSDK, toolchain,remote device testing,etc.
  • 9. Open Source qt.gitorious.org Qt can be used in commercial, closed-source appsChanges to Qt source must be shared Tech support available Included support
  • 10. Nokia E71 Nokia N8 (S60 3.1, 2008) (Symbian^3, 2010) • Qt for Symbian: – Works on S60 3.1+ (E71, E72, 5800, N97, N8, etc.) * – Look up platform versions: http://www.forum.nokia.com/devices/ Qt Compatibility Qt Pre-Installed* Qt can be installed on all compatible devices. Not all devices are enabled for Qt content in the Ovi Store. Current list of Ovi Store device deployment support for Qt apps:http://www.forum.nokia.com/Distribute/Packaging_and_signing.xhtml
  • 11. • Open Source Linux for Mobile Computers – Based on Maemo and MobLin – Developed by Nokia and Intel – Hosted by the Linux Foundation – www.meego.com
  • 12. • Qt is the same on all platforms, but: – New UI concepts for mobile devices • Touch screen, limited screen space – Be careful • Network speed, roaming, battery – More possibilities • GPS, accelerometer, compass, haptics, multitouch• Platform-specific knowledge – Mainly hidden – A few concepts shine through • Security system (Symbian: capabilities, signing) • Need to use native operating system APIs when Qt doesn’t provide the functionality
  • 13. • You‘ll love Qt! – Easier setup • 1-click installation (Qt SDK) – Hides complexity • No descriptors, cleanup stack, two-phase construction, active objects – Less code, more efficiency Nokia 7650 (2001) Nokia’s first Symbian phone – Expand the reach • Deploy your app not only to Symbian, but also to MeeGo and other platforms
  • 14. • Expand your reach – Reach different market segment – Nokia: 30.8% global market share (Q4 2010, IDC)• Porting – Web: supported with all manufacturers – Native apps: different programming languages• Porting Guidelines – http://wiki.forum.nokia.com/index.php/Porting_Mobile_Applications_to_Qt
  • 15. • Keep your assets – Reuse images, sound & music• Screen resolution iPhone <= 3 480 x 320 3:2 iPhone 4 960 x 640 3:2 Nexus S 800 x 480 5:3 Symbian^1 & 3 Samsung Galaxy S 800 x 480 5:3 640 x 360 16:9 aspect ratio Nokia N900 800 x 480 5:3
  • 16. Engine: WebKit (latest version,great HTML 5 support)Dev. environment: Qt SDK - Storage of content on the device (HTML, CSS, JavaScript, Images) - Menu iconEngine: WebKit (earlier version, - Access to device featuressame as phone browser)Dev. environment: Aptana Studio / Nokia Web SDK
  • 17. Rewriting your source code is always required Java (parts in C++ possible) Native OpenGL ES 2.0 is Eclipse supported on all platforms, but steep learning curve and more effort! C++ Qt SDKObjective CXcode
  • 18. • Qt SDK 1.1 Maemo – One-click installation • IDE, toolchain, documentation, examples Desktop Simulator – Tech Preview out now: Qt SDK works on http://labs.qt.nokia.com/2011/01/20/qt-sdk- Windows, Linux, 1-1-technology-preview-released/ Mac MeeGo Symbian (soon)
  • 19. • Efficient Testing – Quick launch – Scripting possibilities • Using JavaScript – Simulate mobile environments • Location, contacts, etc. – Simulate phone events • Battery, messages, etc. – Skins for different platforms / form-factors • Resolutions, orientation, etc.
  • 20. • Widgets (QLabel, QPushButton, etc.) – Use platform UI design – Support style sheets – Drag & drop UI designer Great for desktop. Static layouts make effects difficult. Small UI, different interaction paradigms.
  • 21. • Qt Quick – QML language and JavaScript – Declarative syntax, animations and states integrated – Drag & drop UI designer Very easy to make slick, fluid UIs. Most important for mobile devices! Ready-made UI components on their way ** Project page: http://bugreports.qt.nokia.com/browse/QTCOMPONENTS
  • 22. Desktop App Mobile App GameWidgetsQt QuickOpenGLWeb
  • 23. ~ 300 lines of code, #include <QApplication> import Qt 4.7~ 15 files #include <QPushLabel> Rectangle { int main(int argc, char *argv[]) width: 360 { height: 360 QApplication app(argc, argv); QLabel helloLabel("Hello World"); Text { helloLabel.setAlignment(Qt::AlignCenter); anchors.centerIn: parent helloLabel.showMaximized(); text: "Hello World" } return app.exec(); } }
  • 24. • Most cross-platform – Design and create any custom user interface – Same resolution: pixel precise on desktop, Symbian and MeeGo Windows 7 Simulator Maemo / MeeGo Symbian^3
  • 25. import Qt 4.7 Rectangle {• Describe UI by tree structure of width: 200 height: 200 property bindings Image { – Properties dynamically source: "QtLogo.png" anchors.centerIn: parent evaluated } – Communication through } signals & slots – Bindings to C++ code possible – Animate properties using states and transitions
  • 26. import Qt 4.7 Rectangle { width: 200• Interactivity height: 200 – Interact with Image { source: "QtLogo.png" mouse / touch anchors.centerIn: parent – Execute JavaScript in signal } MouseArea { handlers anchors.fill: parent onClicked: parent.color = "green" } }
  • 27. import Qt 4.7 Rectangle { width: 200• Dynamic property update height: 200 – Move image with mouse Image { source: "QtLogo.png" x: myMouse.mouseX y: myMouse.mouseY } MouseArea { id: myMouse hoverEnabled: true anchors.fill: parent onClicked: parent.color = "green" } }
  • 28. Viewer on PC & mobile: Qt C++ app to load and show QMLTesting 100% pure QML directly Can include C++ for app logicE.g., created by Flowella
  • 29. • Simplify building rich UIs with Qt Quick – Provides widgets for Qt Quick – title bar, actions, list items, buttons, etc. – Styles to integrate with native look & feel• More Info – Open source, in development – General info: http://labs.qt.nokia.com/2010/09/10/building- the-future-reintroducing-the-qt-quick- components/
  • 30. Mobility 1.1 – develop now,Mobility 1.0 – use now deploy to Ovi Store end of Q1 2011Bearer Management API CameraContacts Document GalleryLocation FeedbackMessaging LandmarksMultimedia Maps/NavigationPublish and Subscribe OrganizerService Framework Service Framework – Out of processSensorsSystem InformationVersit
  • 31. Qt Install App (& SI) Required Qt version not already installed? Download and install Qthttp://wiki.forum.nokia.com/index.php/Nokia_Smart_Installer_for_Symbian
  • 32. * Qt apps are native apps; therefore, the security model of the target operating system applies.1. Determine the required security / privacy related features – Most common: (See: wiki.forum.nokia.com/index.php/Capabilities ) Feature Capability Internet access, telephony, messaging NetworkServices Access location (GPS, etc.) Location Camera, record audio UserEnvironment Contacts, Calendar ReadUserData / WriteUserData Bluetooth LocalServices IMEI, model name, battery status ReadDeviceData2. Define the capabilities in the Qt project file (.pro) symbian:TARGET.CAPABILITY += Location ReadUserData
  • 33. 3. Get the right certificate during development
  • 34. 4. PublishNeed Certified Signed capabilities?wiki.forum.nokia.com/index.php/Capabilities-> Purchase a Publisher ID ($200 / year)Submit to Certified Signed process @ www.symbiansigned.com
  • 35. Windows Symbian MeeGo Mac OS Linux N900 Tech Preview: out now* Remember: Qt 4.6 apps (= w/o Qt Quick) supported on the Ovi Store for Symbian since summer 2010!
  • 36. Symbian^3 Symbian^1S60 3.1 S60 3.2 S60 5.0
  • 37. • Qt SDK – Help, examples• Discussion boards, wikis – Forum Nokia: http://www.forum.nokia.com/ – Qt Developer Network: http://developer.qt.nokia.com/• e-Learning materials – http://qt.nokia.com/developer/learning/online/training/ – http://qt.nokia.com/services-partners/qt-in-education/qt-in-education-course-material• Community – http://www.qtcentre.org/
  • 38. Beginning Nokia Apps Development Ray Rischpater, Daniel Zucker. Apress. Complete end-to-end story of developing for Symbian and MeeGo with Qt (Quick) and HTML 5. Status: Qt 4.7, December 2010 Foundations of Qt Development Johan Thelin. Apress. More in-depth and technically oriented explanation of Qt – different approach to many other books. Generic Qt, no mobile. Status: 2007C++ GUI Programming with Qt 4 (2nd edition)Jasmin Blanchette, Mark Summerfield. Prentice Hall.Official book for generic Qt development (no mobile). Good for looking things up or for enhancing yourknowledge, average for learning from scratch.Status: Qt 4.3, 2008
  • 39. • Official accreditation for individual developers – Confirms your development skills in Qt – Become more attractive in the job market! – Qt Essentials exam: 50 multiple choice questions, 60 minutes – Coming soon: Qt Advanced exams (widgets and C++)
  • 40. • Active community member? – Be even more involved, improve your network and get rewarded! – Forum Nokia Champion http://www.forum.nokia.com/Community/Champions/ – Qt Ambassador http://qt.nokia.com/qt-in-use/ambassadors/qtambassador/
  • 41. • Qt is a good way to teach software development – Instant results to motivate attendees – Graphical tools make entry easier – Flexible system, extensible with own libraries – … and still standard C++!• University support – Free Qt course materials under Creative Commons (PPT and OpenOffice) http://qt.nokia.com/services-partners/qt-in-education/qt-in-education-course-material – Forum Nokia University support http://www.forum.nokia.com/Developer_Programs/Forum_Nokia_for_universities/
  • 42. • Not happy with the way something works? Found a bug? – Submit your Qt bug report or suggestion to: http://bugreports.qt.nokia.com/ – Unsure about what to include? The guide is here: http://developer.qt.nokia.com/wiki/ReportingBugsInQt – Found a bug somewhere outside of Qt? Report it here: http://www.forum.nokia.com/Support/ – Also go to the above URL to buy a commercial support ticket if needed!
  • 43. Want to learn more?www.forum.nokia.com/QtAndreas JaklSenior Technical ConsultantForum Nokia