Responding to User Text Entry: field.addEventListener(TextEvent.TEXT_INPUT, onTextInput); : text event « TextField « Flash / Flex / ActionScript

1. Flash / Flex / ActionScript
2. TextField
3. text event

Responding to User Text Entry: field.addEventListener(TextEvent.TEXT_INPUT, onTextInput);

 

package {

  import flash.display.Sprite;
  import flash.text.TextField;
  import flash.text.TextFieldType;
  import flash.events.TextEvent;
  import flash.events.TextEvent;

  public class Main extends Sprite {

    private var _field:TextField = new TextField(  );

    public function Main(  ) {
      _field.border = true;
      _field.background = true;
      _field.type = TextFieldType.INPUT;
      addChild(_field);
      _field.addEventListener(TextEvent.TEXT_INPUT, onTextInput);
    }
    
    private function onTextInput(event:TextEvent):void {
      if(event.text == "a" && _field.length == 0) {
          event.preventDefault(  );
      }
    }
  }
}

        

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