Qt QML

Contents

Getting Started

QML and QML Types

Lists and Models

JavaScript Environment for QML Applications

Integrating QML with C++ Applications

Additional Frameworks

Guides and Other Information

Reference

Qt QML

The Qt QML module provides a framework for developing applications and libraries with the QML language. It defines and implements the language and engine infrastructure 基础设施, and provides an API to enable application developers to extend the QML language with custom types and integrate QML code with JavaScript and C++ 集成QML和C++. The Qt QML module provides both a QML API and a C++ API.

Note that while the Qt QML module provides the language and infrastructure for QML applications, the Qt Quick module provides many visual components 可视化组件, model-view support, an animation framework 动画框架, and much more for building user interfaces.

For those new to QML and Qt Quick, please see QML Applications for an introduction to writing QML applications.

Getting Started

To include the definitions of the module’s classes, use the following directive:

#include

The QML types in Qt QML are available through the QtQML import. To use the types, add the following import statement to your .qml file:

import QtQml 2.0

To link against the module, add this line to your qmake .pro file:

QT += qml

QML and QML Types

The Qt QML module contains the QML framework and important QML types used in applications. The constructs of QML are described in the The QML Reference.

In addition to the QML Basic Types, the module comes with the following QML object types:

Component

QtObject

Binding

Connections

Timer

The Qt global object provides useful enums and functions for various QML types.

Lists and Models

New in Qt 5.1, the model types are moved to a submodule, QtQml.Models. The Qt QML Models page has more information.

DelegateModel

DelegateModelGroup

ListElement

ListModel

ObjectModel

JavaScript Environment for QML Applications

JavaScript expressions allow QML code to contain application logic. Qt QML provides the framework for running JavaScript expressions in QML and from C++.

These sections are from The QML Reference.

Integrating QML and JavaScript

Using JavaScript Expressions with QML

Dynamic QML Object Creation from JavaScript

Defining JavaScript Resources In QML

Importing JavaScript Resources In QML

JavaScript Host Environment

Integrating QML with C++ Applications

The module also provides the framework for running QML applications. The QML framework allows QML code to contain JavaScript expressions and for the QML code to interact with C++ code.

Important C++ Classes Provided By The Qt QML Module

Integrating QML and C++

Additional Frameworks

The Declarative State Machine Framework

Guides and Other Information

Further information for writing QML applications:

The QML Reference

QML Applications - essential information for application development with QML and Qt Quick

Qt Quick - a module which provides a set of QML types and C++ classes for building user interfaces and applications with QML

Reference

C++ Classes

QML Types

Examples