Triggering effects when a container’s visibility is changed

The following example shows you how you can trigger effects when the visible property changes on a Flex container or control by using the hideEffect and showEffect effects.

Full code after the jump.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/09/20/triggering-effects-when-a-containers-visibility-is-changed/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Zoom id="zoom" />

    <mx:ApplicationControlBar dock="true">
        <mx:Button label="hide"
                click="panel.visible = false;"
                enabled="{panel.visible}" />
        <mx:Button label="show"
                click="panel.visible = true;"
                enabled="{!panel.visible}" />
    </mx:ApplicationControlBar>

    <mx:Panel id="panel"
            title="title"
            status="status"
            showEffect="{zoom}"
            hideEffect="{zoom}"
            width="100%"
            height="100%">

        <mx:ControlBar>
            <mx:Label text="control bar" />
        </mx:ControlBar>
    </mx:Panel>

</mx:Application>

View source is enabled in the following example.

If you want to use a specific easing type (Back, Bounce, Elastic, etc), you can use the following snippet specify the easing function that will be applied to the animation:

<mx:Script>
    <![CDATA[
        import mx.effects.easing.Bounce;
    ]]>
</mx:Script>

<mx:Zoom id="zoom" easingFunction="Bounce.easeOut" />

View source is enabled in the following example.

5 thoughts on “Triggering effects when a container’s visibility is changed

  1. Maycon,

    Yeah, I updated the entry above, but basically you can specify the easingFunction property in your <mx:Zoom /> tag (or whatever effect you’re using).

    Peter

  2. Does anyone know how to get rid of that little flicker on the showEffect, where the target shows up for a millisecond BEFORE the effect starts?

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