Setting a content background color on an FxTextArea control in Flex Gumbo

The following example shows how you can set the content background color on a Flex Gumbo FxTextArea control by setting the contentBackgroundColor style.

Full code after the jump.

To use the following code, you must have Flash Player 10 and a Flex Gumbo SDK installed in your Flex Builder 3. For more information on downloading and installing the Gumbo SDK into Flex Builder 3, see “Using the beta Gumbo SDK in Flex Builder 3″.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/01/07/setting-a-content-background-color-on-an-fxtextarea-control-in-flex-gumbo/ -->
<Application name="FxTextArea_contentBackgroundColor_test"
        xmlns="http://ns.adobe.com/mxml/2009"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <ApplicationControlBar dock="true">
        <Form styleName="plain">
            <FormItem label="contentBackgroundColor:">
                <ColorPicker id="colorPicker"
                        selectedColor="white" />
            </FormItem>
        </Form>
    </ApplicationControlBar>

    <FxTextArea id="textArea"
            contentBackgroundColor="{colorPicker.selectedColor}"
            width="100%"
            height="100%">
        <text><String source="data/lorem.txt" /></text>
    </FxTextArea>

</Application>

View source is enabled in the following example.

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

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/01/07/setting-a-content-background-color-on-an-fxtextarea-control-in-flex-gumbo/ -->
<Application name="FxTextArea_contentBackgroundColor_test"
        xmlns="http://ns.adobe.com/mxml/2009"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <Style>
        FxTextArea {
            contentBackgroundColor: haloOrange;
        }
    </Style>

    <FxTextArea id="textArea"
            width="100%"
            height="100%">
        <text><String source="data/lorem.txt" /></text>
    </FxTextArea>

</Application>

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

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2009/01/07/setting-a-content-background-color-on-an-fxtextarea-control-in-flex-gumbo/ -->
<Application name="FxTextArea_contentBackgroundColor_test"
        xmlns="http://ns.adobe.com/mxml/2009"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <Script>
        <![CDATA[
            import mx.events.ColorPickerEvent;

            private function colorPicker_change(evt:ColorPickerEvent):void {
                textArea.setStyle("contentBackgroundColor", evt.color);
            }
        ]]>
    </Script>

    <ApplicationControlBar dock="true">
        <Form styleName="plain">
            <FormItem label="contentBackgroundColor:">
                <ColorPicker id="colorPicker"
                        selectedColor="white"
                        change="colorPicker_change(event);" />
            </FormItem>
        </Form>
    </ApplicationControlBar>

    <FxTextArea id="textArea"
            width="100%"
            height="100%">
        <text><String source="data/lorem.txt" /></text>
    </FxTextArea>

</Application>

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

2 thoughts on “Setting a content background color on an FxTextArea control in Flex Gumbo

  1. Trying this one 4.0.0.4021 and it says

    Cannot resolve attribute ‘contentBackgroundColor’ for component type mx.components.FxTextArea.

    I’m guessing this was removed or renamed.

Comments are closed.