Toggling the drop shadow on a Panel container in Flex

The following example shows how you can toggle the drop shadow on a Flex Panel container by setting the dropShadowEnabled style.

Full code after the jump.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/10/19/toggling-the-drop-shadow-on-a-panel-container-in-flex/ -->
<mx:Application name="Panel_dropShadowEnabled_test"
        xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:ApplicationControlBar dock="true">
        <mx:CheckBox id="checkBox"
                label="dropShadowEnabled:"
                labelPlacement="left"
                selected="true" />
    </mx:ApplicationControlBar>

    <mx:Panel id="panel"
            title="Panel title"
            width="100%"
            height="100%"
            borderColor="haloSilver"
            dropShadowEnabled="{checkBox.selected}">
        <mx:Label text="Panel contents" />
    </mx:Panel>

</mx:Application>

View source is enabled in the following example.

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

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/10/19/toggling-the-drop-shadow-on-a-panel-container-in-flex/ -->
<mx:Application name="Panel_dropShadowEnabled_test"
        xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Style>
        Panel {
            border-color: haloSilver;
            dropShadowEnabled: false;
        }
    </mx:Style>

    <mx:Panel id="panel"
            title="Panel title"
            width="100%"
            height="100%">
        <mx:Label text="Panel contents" />
    </mx:Panel>

</mx:Application>

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

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/10/19/toggling-the-drop-shadow-on-a-panel-container-in-flex/ -->
<mx:Application name="Panel_dropShadowEnabled_test"
        xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Script>
        <![CDATA[
            private function checkBox_change(evt:Event):void {
                panel.setStyle("dropShadowEnabled", checkBox.selected);
            }
        ]]>
    </mx:Script>

    <mx:ApplicationControlBar dock="true">
        <mx:CheckBox id="checkBox"
                label="dropShadowEnabled:"
                labelPlacement="left"
                selected="true"
                change="checkBox_change(event);" />
    </mx:ApplicationControlBar>

    <mx:Panel id="panel"
            title="Panel title"
            width="100%"
            height="100%"
            borderColor="haloSilver">
        <mx:Label text="Panel contents" />
    </mx:Panel>

</mx:Application>