Behavior QML Type▲
-
Import Statement: import QtQuick 2.13
-
Group: Behavior is part of qtquick-transitions-animations, qtquick-interceptors
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
QtQuick 2.0
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 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 Qt Quick Behaviors with States.
See Also▲
Property Documentation▲
animation : Animation▲
This property holds the animation to run when the behavior is triggered.
enabled : bool▲
This property holds whether the behavior will be triggered when the tracked property changes value.
By default a Behavior is enabled.
[since QtQuick 2.13] targetValue : Variant▲
This property holds the target value of the property being controlled by the Behavior. This value is set by the Behavior before the animation is started.
This property was introduced in QtQuick 2.13.