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Maemo 6 UI Framework

Tomas Junnonen

Application Framework Architect, Nokia

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Status Quo of the Maemo 5 UI framework• UI Framework implemented using Gtk+• Window composition using OpenGL• Single-touch gestures• Gtk+ applications use the CPU for rendering• Applications can however use OpenGL directly

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Drivers for renewal in Maemo 6 • Iconic user experience, animations & transitions • Portrait and landscape throughout the UI• Hardware trends• OpenGL ES acceleration• Multi-touch, capacitive displays• Improved finger usability

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Maemo 6 UI Framework• Built using Qt4.6• Full UI acceleration using OpenGL• Designed from the ground up to be finger usable• Multi-touch gestures• Portrait and landscape modes• Core components are cross platform for a better developer experience

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Built using the latest Qt capabilities• Qt Animation Framework• State Machine Framework• Multi-touch & Gestures• Graphics Effects• Qt3D

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A scene graph approach to UI• Built using the Qt Graphics View Framework• Widgets, layouts, all part of one big scene• Windows act as views into the scenes• Supports zooming, rotation, animations• Simple physics for select components

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Qt provides• OpenGL ES 2.0 accelerated painting system• Graphics View• A base for developing widgets for the scene• Collision detection, events, layouts, drag and drop, input handling, etc.• Framework for creating animations• The kitchen sink

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Maemo 6 UI framework provides• Maemo 6 UI look and feel• A set of widgets for the scene• Additional layouts, including implicit animations• Application level scene management, transitions• Maemo 6 specific gestures• Application life cycle management• An advanced theming system based on SVG and CSS

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Core UI framework components also include

• The usual suspects:• Device homescreen• Control panel• Help system

• A compositing window manager• Resource management and sharing daemon

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Maemo 6 UI framework - Technical Preview• Available now:

http://qt.gitorious.org/maemo-6-ui-framework

• Includes the application framework library and the homescreen• Dependencies include the Qt 4.6 technical preview• Feedback and questions to: tomas.junnonen@nokia.com