Determining if an item index is selected in an FxButtonBar control in Flex Gumbo

In a previous example, “Determining if an item is selected in an FxButtonBar control in Flex Gumbo”, we saw how you could determine if a specific item is selected in a Flex Gumbo FxButtonBar control by using the isItemSelected() method.

The following example shows how you can determine if a specific item index is selected in a Flex Gumbo FxButtonBar control by using the isItemIndexSelected() method.

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/2009/02/22/determining-if-an-item-index-is-selected-in-an-fxbuttonbar-control-in-flex-gumbo/ -->
<Application name="FxButtonBar_isItemIndexSelected_test"
        xmlns="http://ns.adobe.com/mxml/2009"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <Script>
        <![CDATA[
            private function btnBar_updateComplete(evt:Event):void {
                lblNegOne.text = btnBar.isItemIndexSelected(-1).toString();
                lblZero.text = btnBar.isItemIndexSelected(0).toString();
                lblOne.text = btnBar.isItemIndexSelected(1).toString();
                lblTwo.text = btnBar.isItemIndexSelected(2).toString();
            }
        ]]>
    </Script>

    <ApplicationControlBar dock="true">
        <Form styleName="plain">
            <FormItem label="isItemIndexSelected(-1):">
                <Label id="lblNegOne" />
            </FormItem>
            <FormItem label="isItemSelected(0):">
                <Label id="lblZero" />
            </FormItem>
            <FormItem label="isItemSelected(1):">
                <Label id="lblOne" />
            </FormItem>
            <FormItem label="isItemSelected(2):">
                <Label id="lblTwo" />
            </FormItem>
        </Form>
    </ApplicationControlBar>

    <FxButtonBar id="btnBar"
            updateComplete="btnBar_updateComplete(event);">
        <dataProvider>
            <ArrayCollection source="[One,Two,Three,Four,Five,Six]" />
        </dataProvider>
    </FxButtonBar>

</Application>

This entry is based on a beta version of the Flex Gumbo SDK and therefore is very likely to change as development of the Flex SDK continues. The API can (and will) change causing examples to possibly not compile in newer versions of the Flex Gumbo SDK.