Setting the background color on a Halo DataGrid control in Flex 4

The following example shows how you can set the content background color on a Halo DataGrid control (with default Spark skin) in Flex 4 by setting the contentBackgroundColor and alternatingItemColors styles.

Full code after the jump.

The following example(s) require Flash Player 10 and the Adobe Flex 4 SDK. To download the Adobe Flash Builder 4 trial, see www.adobe.com/products/flex/. To download the latest nightly build of the Flex 4 SDK, see opensource.adobe.com/wiki/display/flexsdk/Download+Flex+4.

For more information on getting started with Flex 4 and Flash Builder 4, see the official Adobe Flex Team blog.

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/07/01/setting-the-background-color-on-a-halo-datagrid-control-in-flex-4/ -->
<s:Application name="Halo_DataGrid_contentBackgroundColor_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/halo">
 
    <mx:ApplicationControlBar width="100%" cornerRadius="0">
        <mx:Form styleName="plain">
            <mx:FormItem label="contentBackgroundColor:">
                <mx:ColorPicker id="colorPicker"
                        selectedColor="white" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>
 
    <mx:DataGrid id="dataGrid"
            dataProvider="{Font.enumerateFonts(true)}"
            contentBackgroundColor="{colorPicker.selectedColor}"
            alternatingItemColors="[]"
            horizontalCenter="0" verticalCenter="0" />
 
</s:Application>

View source is enabled in the following example.

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You could also set the contentBackgroundColor style in an external .CSS file or <Script/> block, as seen in the following example:

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/07/01/setting-the-background-color-on-a-halo-datagrid-control-in-flex-4/ -->
<s:Application name="Halo_DataGrid_contentBackgroundColor_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/halo">
 
    <fx:Style>
        @namespace s "library://ns.adobe.com/flex/spark";
        @namespace mx "library://ns.adobe.com/flex/halo";
 
        mx|DataGrid {
            alternatingItemColors: ClassReference(null);
            contentBackgroundColor: haloBlue;
        }
    </fx:Style>
 
    <mx:DataGrid id="dataGrid"
            dataProvider="{Font.enumerateFonts(true)}"
            horizontalCenter="0" verticalCenter="0" />
 
</s:Application>

Or, you could set the contentBackgroundColor style using ActionScript, as seen in the following example:

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/07/01/setting-the-background-color-on-a-halo-datagrid-control-in-flex-4/ -->
<s:Application name="Halo_DataGrid_contentBackgroundColor_test"
        xmlns:fx="http://ns.adobe.com/mxml/2009"
        xmlns:s="library://ns.adobe.com/flex/spark"
        xmlns:mx="library://ns.adobe.com/flex/halo">
 
    <fx:Script>
        <![CDATA[
            import mx.events.ColorPickerEvent;
 
            protected function colorPicker_change(evt:ColorPickerEvent):void {
                dataGrid.setStyle("contentBackgroundColor", evt.color);
            }
        ]]>
    </fx:Script>
 
    <mx:ApplicationControlBar width="100%" cornerRadius="0">
        <mx:Form styleName="plain">
            <mx:FormItem label="contentBackgroundColor:">
                <mx:ColorPicker id="colorPicker"
                        selectedColor="white"
                        change="colorPicker_change(event);"/>
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>
 
    <mx:DataGrid id="dataGrid"
            dataProvider="{Font.enumerateFonts(true)}"
            alternatingItemColors="[]"
            horizontalCenter="0" verticalCenter="0" />
 
</s:Application>

This entry is based on a beta version of the Flex 4 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 4 SDK.