QML Behavior Element

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

Properties

• animation : Animation
• enabled : bool

Detailed Description

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 Qt 4.7

 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 state change has a Transition that matches the same property as a Behavior, the Transition animation overrides the Behavior for that state change.

See also QML Animation, Behavior example, and QtDeclarative.

Property Documentation