What's New in Qt 4.7
Qt 4.7 provides many improvements and enhancements over the previous releases in the Qt 4 series. This document covers the most important features in this release, separated by category.
A list of other Qt 4 features can be found on the 
is a C++ library that provides the underlying engine, which translates the declarative description of the UI in QML into items on a QGraphicsScene. The library also provides APIs to bind custom C++ types and elements to QML, and to connect the QML UI with the underlying application logic written in C++.
Network Bearer Management
Bearer Management controls the connectivity state of the system. The new Bearer Management API in the QtNetwork module allows the application to identify whether the system is online and how many interfaces there are, as well as start and stop interfaces, or roam transparently between access points.
QNetworkAccessManager uses this API for HTTP level roaming.
Multimedia - playback and declarative elements
The Multimedia API provides media playback and playlist support for Qt Applications. Play music and movies through a single interface with selectable output for movies to widgets or graphics view.
Multimedia support for Quick is also available with the new multimedia declarative elements.
New Classes, Functions, Macros, etc.
Links to new classes, elements, functions, macros, and other items introduced in Qt 4.7.
New Classes
- D
- QDeclarativeComponent
- QDeclarativeContext
- QDeclarativeEngine
- QDeclarativeError
- QDeclarativeExpression
- QDeclarativeExtensionPlugin
- QDeclarativeImageProvider
- QDeclarativeItem
- QDeclarativeListProperty
- QDeclarativeListReference
- QDeclarativeNetworkAccessManagerFactory
- QDeclarativeParserStatus
- QDeclarativeProperty
- QDeclarativePropertyMap
- QDeclarativeScriptString
- QDeclarativeView