Setting the base color on a Spark DropDownList control in Flex 4

The following example shows how you can set the base color on a Spark DropDownList control in Flex 4 by setting the baseColor style.

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/2009/04/17/setting-the-base-color-on-a-spark-dropdownlist-control-in-flex-gumbo/ -->
<s:Application name="Spark_DropDownList_baseColor_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="baseColor:">
                <mx:ColorPicker id="colorPicker" selectedColor="#CCCCCC" />
            </mx:FormItem>
        </mx:Form>
    </mx:ApplicationControlBar>
 
    <s:DropDownList id="dropDownList"
            prompt="Please select a thing..."
            labelField="label"
            baseColor="{colorPicker.selectedColor}"
            horizontalCenter="0"
            top="60">
        <s:dataProvider>
            <s:ArrayList>
                <fx:Object label="One" />
                <fx:Object label="Two" />
                <fx:Object label="Three" />
                <fx:Object label="Four" />
                <fx:Object label="Five" />
                <fx:Object label="Six" />
                <fx:Object label="Seven" />
                <fx:Object label="Eight" />
                <fx:Object label="Nine" />
            </s:ArrayList>
        </s:dataProvider>
    </s:DropDownList>
 
</s:Application>

View source is enabled in the following example.

You can also set the baseColor style using an external .CSS file or <Style/> block, as seen in the following example:

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/04/17/setting-the-base-color-on-a-spark-dropdownlist-control-in-flex-gumbo/ -->
<s:Application name="DropDownList_baseColor_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";
 
        s|DropDownList {
            baseColor: haloBlue;
        }
    </fx:Style>
 
    <s:DropDownList id="dropDownList"
            prompt="Please select a thing..."
            labelField="label"
            horizontalCenter="0"
            top="20">
        <s:dataProvider>
            <s:ArrayList>
                <fx:Object label="One" />
                <fx:Object label="Two" />
                <fx:Object label="Three" />
                <fx:Object label="Four" />
                <fx:Object label="Five" />
                <fx:Object label="Six" />
                <fx:Object label="Seven" />
                <fx:Object label="Eight" />
                <fx:Object label="Nine" />
            </s:ArrayList>
        </s:dataProvider>
    </s:DropDownList>
 
</s:Application>

Or, you can set the baseColor style using ActionScript, as seen in the following example:

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/04/17/setting-the-base-color-on-a-spark-dropdownlist-control-in-flex-gumbo/ -->
<s:Application name="DropDownList_baseColor_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[
            private function btn_click(evt:Event):void {
                dropDownList.setStyle("baseColor", "haloBlue");
            }
        ]]>
    </fx:Script>
 
    <s:Button id="btn"
            label="Set baseColor"
            click="btn_click(event);"
            left="10"
            top="10" />
 
    <s:DropDownList id="dropDownList"
            prompt="Please select a thing..."
            labelField="label"
            horizontalCenter="0"
            top="20">
        <s:dataProvider>
            <s:ArrayList>
                <fx:Object label="One" />
                <fx:Object label="Two" />
                <fx:Object label="Three" />
                <fx:Object label="Four" />
                <fx:Object label="Five" />
                <fx:Object label="Six" />
                <fx:Object label="Seven" />
                <fx:Object label="Eight" />
                <fx:Object label="Nine" />
            </s:ArrayList>
        </s:dataProvider>
    </s:DropDownList>
 
</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.