QML is a declarative language that lets you describe user interfaces in terms of their visual components and how they interact and relate with one another. It is a highly readable language for designing components that support dynamic interconnection, reuse, and customization within a user interface.

QML enables designers and developers to build fluid and animated user interfaces and to connect them to any back-end C++ libraries. It lets you declare the application building blocks such as UI components and various properties, which define the application's behavior.

This reference guide describes the key features of the QML language for Qt Quick Ultralite. Many of the QML types in the guide originate from the QtQuick module.

• QML syntax basics
  • Import statements
  • Object declarations
    • Child objects
  • Comments
• QML object attributes
  • id attribute
  • Property attributes
  • Signal attributes
  • Signal handler attributes
  • Method attributes
  • Attached properties and attached signal handlers
  • Enumeration attributes
• Property bindings
• Signal and handler event system