Saturday, December 11, 2010

Qt Conference - Tokyo 2010

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In yesterday, Qt Conference - Tokyo 2010 was held at Akihabara, Tokyo. There are many sessions like below:
  1. Keynote 1
    • Speaker: Daniel Kihlberg
    • Japan: 45% growth on the web in 2010
    • Nokia is now shipping devices with Qt
    • Qt 4.7: Increased performance and QML
    • Open governance of Qt
    • Qt Certification
    • Qt = the application platform
    • Bridges Symbian and Meego
    • eating our own dog food
    • Meego focuses open innovation
      • Application Vendors, Chipset Vendors and Device Vendors
  2. Keynote 2
    • Speaker: David Almstrom
    • Qt Architecture : Cross platform
    • Qt Everywhere: STB, Mobile, HP Printer, Coffee maker and so on
    • Qt licenses
      • Commercial
      • LGPL v2.1
      • GPL v3
    • Code once -Deploy Everywhere using SDK
    • Qt for Mobile Devices
      • Symbian Devices
      • Meego Devices
      • Ovi services
    • Genivi Consortium
      • Meego IVI Distro
    • Qt 4.7
      • QtQuick
      • benchmark-driven development culture
      • quality
      • mobile development
    • Future
      • more quality
      • hardware acceleration
      • modularity
    • Market Feedback
      • hardware acceleration
      • Web integration
      • data from sensors
      • 3D
      • touch data
    • Scene Graph Project
    • Project Lighthouse
      • New abstract layer for window systems
  3. Qt in Use: Dynamic UI for CE Devices
    • Speaker: Masato Shimoi
    • Who is Netflix?
      • DVD and Blu-ray rent by mail
      • Streaming video has started since 3 years ago
      • 2009, member 12 million / streaming user 6 million
      • 2010, member 19 million / streaming user 11 million
      • New launch at 2010 Q3
        • PS3 embedded app
        • Google TV
        • Apple TV
    • IMO, UI innovations for Video service may increase
    • Innovation area
      • codec
      • DRM
      • protocol
      • security
      • UI Framework
    • NRDP SDK
      • Netflix ready device partner SDK
      • 2008: 1.0: C++ based UI
      • 2009: 2.0 Flash based UI
      • 2010: 2.1/3.0/3.1 Dynamic UI (Flash or HTML5 based UI)
    • We recommend DHTML using Webkit
      • HTML5 momentum
      • HTML expertise is widely available
      • NRDP SDK contains Javascript Extensions for refine Webkit
    • Which distro of Webkit
      • Time to Market
      • Skill of Partners
      • Support
      • Developer community
      • We choose QtWebkit
        • Partners already know Qt technologies
        • Nokia local offices are widely existing
    • Selecting Qt 4.6.2
      • challenge to speed up animations
      • challenge to decrease RAM/flash footprint
    • Benefits
      • no need to wait for firmware updates
      • A/B testing for continuously improving UX
  4. Qt in Use: UX Development with QML on MeeGo
    • Speaker: Hideto Kobayashi
    • Nomovok and Qt
      • #1 MeeGo ARM Integrator
      • using Qt since 2005
      • developing Qt technologies
      • using QML since as QtDeclarative
    • Why QML?
      • Smooth developing with little C++ knowledge
      • Same performances with traditional Qt development
      • Clean separation between UI and logic
      • ease to HW acceleration
      • UX is optimized for different form factors
    • Challenging points
      • There are no tools supporting QML completely still QtCreator 2.1 is released
      • Not so many examples and practices
      • OpenGL: problematic
      • Both l10n and i18n are not supported still QtSDK 4.7.1 is released
    • Coming future we hope
      • Qt lighthouse
        • less dependencies with X11
      • Qt widget toolkits
      • Qt Scene Graph
        • HW acceleration ready
    • QML can create yet another MeeGo UI
  5. Meet Qt: Styling Qt Widgets
    • Speaker: Ryosuke Yamada
    • Increasing demands for applications
      • Improvement of expression
      • Improvement of operability
    • We develop custom widgets
      • Change appearance of original widgets
      • Need for learning both structures and drawings for widget
    • QWidget inherits both QObject and QPaintDevice
    • Each widgets inherit QWidget
    • QWidget has many virtual methods
    • Each widgets override these methods as necessary
    • paintEvent: method for drawing appearance
    • StyleOption Option for states of drawing
      • features
      • state
      • text
      • icon
    • We can set Qstyle for each widgets or whole application
    • GUI Emulation
      • Emulate appearance of distinct platforms inside Qt Framework
      • Subclass of QStyle is created for each platform
      • Drawing is calling primitive API of each platform
      • Some QStyle implementations depend on specific platform
    • If we want to create our own appearance, we implement the subclass of QStyle
  6. Meet Qt: QtCreator
    • Speaker: Kenji Sugita
    • Past Qt GUI tools
      • Qt Designer
      • Qt Assistant
      • Qt Lingulst
    • Qt Creator
      • Code editor optimized for Qt development
      • Integrate with Qt Designer and Qt Assistant
      • qmake, Cmake
      • gdb / CDB
      • Quick Access a.k.a. locator
      • Integrate with VCS (like git)
    • Demo for tips of QtCreator
    • Qt SDK for Windows
      • Application created with Qt SDK is compiled with g++(in MinGW)
      • QtCreator itself and its libraries are compiled with VisualStudio
      • So any plug-ins created with Qt SDK are not adaptable for QtCreator on Windows
      • solutions
        • Create whole with VisualStudio
        • Bulld QtCreator from source with g++(in MinGW)
  7. Meet Qt: QtQuick
    • Speaker: Takumi Asaki
    • Speaker: Tasuku Suzuki
    • What is QtQuick?
      • Qt User Interface Creation Kit
      • Framework for UI development
      • Easy to develop gorgeous UI
      • Easy to develop by who knows less knowledge of C++
    • Past development
      • Using C++ and Qt Designer
      • Problems
        • Qt Designer only deals with static layout
        • If we create gorgeous UI, we must code with C++
      • For instance） If we create Cover art UI
        • C++ : 1622 lines
        • QML : 150 lines
    • Components of QtQuick
      • Qt Declarative Module
        • Execution engine since Qt 4.7
        • usage as C++ API
      • QML
        • Qt Meta-Object Language
        • Declarative language for UI development
        • Syntax like CSS and JSON
      • QtCreator (2.1)
        • QML Editor
        • QML Designer
        • QML Debugger
    • QML syntax
      • tree structures
      • Declares, elements and properties
    • Demo for QML programming on QtCreator
      • There are no button elements
      • Scratch up mouse area, label and so forth as Button
      • Designer in QtCreator can develop creating State
      • Designer in QtCreator cannot develop transitions between states
    • Demo for developing data list
      • There are no compiling in development
    • Matters we still develop with Qt/C++
      • Table manipulation with SQL
      • Network access without HTTP
    • Qt/C++ can access QtQuick features
      • Of course, signals and slots
      • QML can access the instance in Qt/C++
    • Coming features of QtQuick
      • Scene Graph
      • QtQuick Components
      • Qt3D
  8. Optimize the performance
    • Speaker: Tomonari Miyazaki
    • What is QTestLib
      • lightweight
      • highspeed
      • Test for GUI
      • benchmark
    • orders
      1. initTestCase
      2. init
      3. each test functions
      4. cleanup
      5. cleanupTestCase
    • QT += testlib
    • Demo for QTestLib
    • Demo for QBENCHMARK of QTestLib
    • For Window, compile option '-ltcg' increases running speed(10~15%)
    • http://qt.gitorious.org/qt-labs/qtestlib-tools
Advanced Qt Programming Japanese Edition will be published in Summer, 2011.
posted by Youhei Kondou / posted at: 8:13 PM

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