Qt QML QML Types

The Qt QML module provides the definition and implementation of various convenience types that can be used with the QML language. This includes elementary QML types, which can provide the basis for further extensions to the QML language. The QtObject and Component object types are non-visual and provide building-blocks for extensions to QML.

Importing QtQml

The types provided by the QtQml module are only available in a QML document if that document imports the QtQml namespace (or if the document imports the QtQuick namespace, as noted below).

To use the module, import the QtQml module with the following statement:

import QtQml

Most clients will never need to use the QtQml import, as all of the types are also provided by the QtQuick namespace, which may be imported as follows:

import QtQuick

See the Qt Quick module documentation for more information about the QtQuick namespace and what it provides to QML application developers.

The QML types for creating lists and models, such as ListModel and ListElement, are moved to a submodule, QtQml.Models. The Qt QML Models page has more information.

The documentation for the types below applies equally to the types of the same name provided by the Qt Quick module, as they are in fact identical.

Value Types

The following QML Value Types are provided:

point	Value with x and y attributes
rect	Value with x, y, width and height attributes
size	Value with width and height attributes

Object Types

The following QML object types are provided:

Binding	Enables the arbitrary creation of property bindings
Component	Encapsulates a QML component definition
Connections	Describes generalized connections to signals
Date	Provides date functions
Locale	Provides locale specific properties and formatted data
LoggingCategory	Defines a logging category in QML
Number	Object provides represents a number value
Qt	Provides a global object with useful enums and functions from Qt
QtObject	A basic QML type
Timer	Triggers a handler at a specified interval
XMLHttpRequest	Object for sending requests to a server

© 2024 The Qt Company Ltd. Documentation contributions included herein are the copyrights of their respective owners. The documentation provided herein is licensed under the terms of the GNU Free Documentation License version 1.3 as published by the Free Software Foundation. Qt and respective logos are trademarks of The Qt Company Ltd. in Finland and/or other countries worldwide. All other trademarks are property of their respective owners.