Flex Examples

The following example shows how you can prevent a user from pressing Enter in a Flex TextArea control by listening for the textInput event and checking the TextEvent object’s text property for a newline character (”\n”).

Full code after the jump.

View MXML

<?xml version="1.0" encoding="utf-8"?>
<!-- http://blog.flexexamples.com/2008/03/07/preventing-line-feeds-in-a-textarea-control-in-flex/ -->
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml"
        layout="vertical"
        verticalAlign="middle"
        backgroundColor="white">

    <mx:Script>
        <![CDATA[
            private function textArea_textInput(evt:TextEvent):void {
                if (evt.text == "\n") {
                    evt.preventDefault();
                }
            }
        ]]>
    </mx:Script>

    <mx:TextArea id="textArea"
            verticalScrollPolicy="on"
            width="160"
            height="120"
            textInput="textArea_textInput(event);">
        <mx:text>The quick brown fox jumped over the lazy dog.</mx:text>
    </mx:TextArea>

</mx:Application>

View source is enabled in the following example.