Qt Conference - Tokyo 2010

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.