Aligning items horizontally in a ControlBar container in Flex

The following example shows how you can align controls in a Flex ControlBar container by setting the horizontalAlign style.

Full code after the jump.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/02/24/aligning-items-horizontally-in-a-controlbar-container-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Script>
        <![CDATA[
            import mx.events.ItemClickEvent;

            private function toggleButtonBar_itemClick(evt:ItemClickEvent):void {
                cBar.setStyle("horizontalAlign", evt.label);
            }
        ]]>
    </mx:Script>

    <mx:Array id="arr">
        <mx:Object label="left" />
        <mx:Object label="center" />
        <mx:Object label="right" />
    </mx:Array>

    <mx:ApplicationControlBar dock="true">
        <mx:Form styleName="plain">
            <mx:FormItem label="horizontalAlign:">
                <mx:ToggleButtonBar id="toggleButtonBar"
                        dataProvider="{arr}"
                        selectedIndex="0"
                        itemClick="toggleButtonBar_itemClick(event);" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>

    <mx:Panel id="panel"
            width="320"
            height="160">
        <mx:Label text="Button" />
        <mx:Label text="ButtonBar" />
        <mx:Label text="CheckBox" />
        <mx:Label text="ColorPicker" />
        <mx:Label text="ComboBox" />
        <mx:Label text="DataGrid" />

        <mx:ControlBar id="cBar">
            <mx:Button label="Submit" />
            <mx:Button label="Cancel" />
        </mx:ControlBar>
    </mx:Panel>

</mx:Application>

View source is enabled in the following example.

You can also set the horizontalAlign style in an external .CSS file or within an <mx:Style /> block, as seen in the following snippet:

<mx:Style>
    ControlBar {
        horizontalAlign: center;
    }
</mx:Style>

Or, you can set the horizontalAlign style in MXML directly, using the following snippet:

<mx:ControlBar id="cBar" horizontalAlign="center">
    <mx:Button label="Submit" />
    <mx:Button label="Cancel" />
</mx:ControlBar>