Building a simple style browser in Flex 3

In my previous post, “Introducing the StyleManager.selectors property in Flex 3“, we looked at the new StyleManager class’s static selectors property introduced in Flex 3.

This example shows how you can make a simple app which lets you loop over styles currently registered with the StyleManager and display their current style names and values.

Full code after the jump.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2007/09/12/building-a-simple-style-browser-in-flex-3/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="horizontal"
        verticalAlign="middle"
        backgroundColor="white"
        creationComplete="init()">

    <mx:Script>
        <![CDATA[
            import mx.styles.StyleManager;
            import mx.controls.ComboBox;

            private function init():void {
                arr = StyleManager.selectors;
                arr.sort(Array.CASEINSENSITIVE);
            }

            private function list_change(evt:Event):void {
                var styleName:String = String(ComboBox(evt.currentTarget).selectedItem);
                var cssStyle:CSSStyleDeclaration = StyleManager.getStyleDeclaration(styleName);
                var obj:Object = new cssStyle.defaultFactory();
                var styles:Array = [];
                var key:String;

                for (key in obj) {
                    styles.push({key:key, value:obj[key]});
                }

                styles.sortOn("key", Array.CASEINSENSITIVE);
                dataGrid.dataProvider = styles;
            }
        ]]>
    </mx:Script>

    <mx:Array id="arr" />

    <mx:ApplicationControlBar dock="true">
        <mx:Label text="selectors:" />
        <mx:ComboBox id="comboBox"
                prompt="Please select a style..."
                dataProvider="{arr}"
                width="250"
                change="list_change(event)" />
    </mx:ApplicationControlBar>

    <mx:DataGrid id="dataGrid"
            rowHeight="22"
            width="300"
            verticalScrollPolicy="on">
        <mx:columns>
            <mx:DataGridColumn dataField="key"
                    headerText="Style:"
                    itemRenderer="mx.controls.Label" />
            <mx:DataGridColumn dataField="value"
                    headerText="Value:"
                    itemRenderer="mx.controls.Label" />
        </mx:columns>
    </mx:DataGrid>

</mx:Application>

View source is enabled in the following example.