<?xml version="1.0"?>
<!-- http://blog.flexexamples.com/2008/01/18/aligning-labels-in-a-flex-popupbutton-controls-pop-up-menu/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="top"
        backgroundColor="white" viewSourceURL="srcview/index.html">

    <mx:Script>
        <![CDATA[
        	import mx.events.ItemClickEvent;
            import mx.controls.Menu;
            import mx.events.MenuEvent;

            [Bindable]
            private var menu:Menu;

            private function initMenu():void {
                menu = new Menu();
                menu.dataProvider = arr;
            }

            private function toggleButtonBar_itemClick(evt:ItemClickEvent):void {
            	var obj:CSSStyleDeclaration = StyleManager.getStyleDeclaration(".myCustomPopUpStyleName");
            	obj.setStyle("textAlign", evt.label);
            	popUpButton.open();
            }
        ]]>
    </mx:Script>

    <mx:Array id="arr">
        <mx:Object label="Button" />
        <mx:Object label="ButtonBar" />
        <mx:Object label="ColorPicker" />
        <mx:Object label="ComboBox" />
    </mx:Array>

    <mx:Style>
        .myCustomPopUpStyleName {
           textAlign: left;
        }
    </mx:Style>

    <mx:ApplicationControlBar dock="true">
		<mx:Form styleName="plain">
			<mx:FormItem label="textAlign:">
				<mx:ToggleButtonBar id="toggleButtonBar"
						selectedIndex="0"
						itemClick="toggleButtonBar_itemClick(event);">
					<mx:dataProvider>
						<mx:Array>
							<mx:Object label="left" />
							<mx:Object label="center" />
							<mx:Object label="right" />
						</mx:Array>
					</mx:dataProvider>
				</mx:ToggleButtonBar>
			</mx:FormItem>
		</mx:Form>
    </mx:ApplicationControlBar>

    <mx:PopUpButton id="popUpButton"
            label="Select a control..."
            popUp="{menu}"
            popUpStyleName="myCustomPopUpStyleName"
            preinitialize="initMenu();" />

</mx:Application>

