Behavior Class Reference

The Behavior element allows you to specify a default animation for a property change. More...

Detailed Description

The Behavior element allows you to specify a default animation for a property change.

Since

4.7

A Behavior defines the default animation to be applied whenever a particular property value changes.

For example, the following Behavior defines a NumberAnimation to be run whenever the Rectangle's width value changes. When the MouseArea is clicked, the width is changed, triggering the behavior's animation:

import QtQuick 1.0

Rectangle {
    id: rect
    width: 100; height: 100
    color: "red"

    Behavior on width {
        NumberAnimation { duration: 1000 }
    }

    MouseArea {
        anchors.fill: parent
        onClicked: rect.width = 50
    }
}

Note that a property cannot have more than one assigned Behavior. To provide multiple animations within a Behavior, use ParallelAnimation or SequentialAnimation.

If a QML States{state change} has a Transition that matches the same property as a Behavior, the Transition animation overrides the Behavior for that state change. For general advice on using Behaviors to animate state changes, see Using QML Behaviors with States.

See also

{QML Animation and Transitions}, {declarative/animation/behaviors}{Behavior example}, QtDeclarative

---

The documentation for this class was generated from the following file:

• /src/declarative/util/qdeclarativebehavior.cpp