Using the new filter effects in Flex Gumbo

The following example shows how you can use the new Flex Gumbo filter effects from the flex.filters.* package. These new filters allow you to modify the filter’s properties at runtime without needing to recreate and reapply the filter to the display object.

Full code after the jump.

To use the following code, you must have Flash Player 10 and a Flex Gumbo SDK installed in your Flex Builder 3. For more information on downloading and installing the Gumbo SDK into Flex Builder 3, see “Using the beta Gumbo SDK in Flex Builder 3″.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/08/14/using-the-new-filter-effects-in-flex-gumbo/ -->
<Application name="Gumbo_Filters_test"
        xmlns="http://ns.adobe.com/mxml/2009"
        xmlns:mx="library:adobe/flex/halo">
    <layout>
        <BasicLayout />
    </layout>

    <mx:Form>
        <mx:FormItem label="blurX:">
            <mx:HSlider id="blurXSlider"
                    minimum="0"
                    maximum="10"
                    value="4"
                    snapInterval="1"
                    tickInterval="1"
                    liveDragging="true" />
        </mx:FormItem>
        <mx:FormItem label="blurY:">
            <mx:HSlider id="blurYSlider"
                    minimum="0"
                    maximum="10"
                    value="4"
                    snapInterval="1"
                    tickInterval="1"
                    liveDragging="true" />
        </mx:FormItem>
        <mx:FormItem label="quality:">
            <mx:HSlider id="qualitySlider"
                    minimum="0"
                    maximum="10"
                    value="1"
                    snapInterval="1"
                    tickInterval="1"
                    liveDragging="true" />
        </mx:FormItem>
    </mx:Form>

    <BitmapGraphic id="img"
            source="@Embed('flex_logo.jpg')"
            horizontalCenter="0"
            verticalCenter="0">
        <filters>
            <BlurFilter id="blurFilter"
                    blurX="{blurXSlider.value}"
                    blurY="{blurYSlider.value}"
                    quality="{qualitySlider.value}" />
        </filters>
    </BitmapGraphic>

</Application>

View source is enabled in the following example.

You can also set the Gumbo BlurFilter filter’s blurX, blurY, and quality properties using ActionScript, as seen in the following example:

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/08/14/using-the-new-filter-effects-in-flex-gumbo/ -->
<Application name="Gumbo_Filters_test"
        xmlns="http://ns.adobe.com/mxml/2009"
        xmlns:mx="library:adobe/flex/halo">
    <layout>
        <BasicLayout />
    </layout>

    <Script>
        <![CDATA[
            import mx.events.SliderEvent;

            private function blurXSlider_change(evt:SliderEvent):void {
                blurFilter.blurX = evt.value;
            }

            private function blurYSlider_change(evt:SliderEvent):void {
                blurFilter.blurY = evt.value;
            }

            private function qualitySlider_change(evt:SliderEvent):void {
                blurFilter.quality = evt.value;
            }
        ]]>
    </Script>

    <mx:Form>
        <mx:FormItem label="blurX:">
            <mx:HSlider id="blurXSlider"
                    minimum="0"
                    maximum="10"
                    value="4"
                    snapInterval="1"
                    tickInterval="1"
                    liveDragging="true"
                    change="blurXSlider_change(event);" />
        </mx:FormItem>
        <mx:FormItem label="blurY:">
            <mx:HSlider id="blurYSlider"
                    minimum="0"
                    maximum="10"
                    value="4"
                    snapInterval="1"
                    tickInterval="1"
                    liveDragging="true"
                    change="blurYSlider_change(event);" />
        </mx:FormItem>
        <mx:FormItem label="quality:">
            <mx:HSlider id="qualitySlider"
                    minimum="0"
                    maximum="10"
                    value="1"
                    snapInterval="1"
                    tickInterval="1"
                    liveDragging="true"
                    change="qualitySlider_change(event);" />
        </mx:FormItem>
    </mx:Form>

    <BitmapGraphic id="img"
            source="@Embed('flex_logo.jpg')"
            horizontalCenter="0"
            verticalCenter="0">
        <filters>
            <BlurFilter id="blurFilter" />
        </filters>
    </BitmapGraphic>

</Application>

For more information, see http://livedocs.adobe.com/flex/gumbo/langref/.

Tagged as: blurX, blurY, Gumbo, quality