Auto-scroll Text Area

Ber­ikut ini con­toh kode untuk mem­buat scroll­bar kom­ponen fl.controls.TextArea otomatis ber­gerak ke bawah kalo ada penam­bahan teks sehingga baris-baris ter­baru selalu kelihatan.

package  {

	import fl.controls.Button;
	import fl.controls.TextArea;
	import fl.controls.TextInput;
	import fl.events.ComponentEvent;
	import flash.display.MovieClip;
	import flash.events.Event;
	import flash.events.MouseEvent;

	public class Main extends MovieClip {

		public var console:TextArea;
		public var input:TextInput

		public function Main() {

			console.text = "A\nB\nC\nD\nE\nF\nG\nH\nI\nJ\nK\n";

			console.addEventListener(Event.RENDER, updateScrollPosition);

			input.addEventListener(ComponentEvent.ENTER, addText);

		}

		private function updateScrollPosition(e:Event):void {
			console.verticalScrollPosition = console.maxVerticalScrollPosition;
		}

		private function addText(e:Event):void {
			if (input.length > 0 ) {
				console.appendText(input.text + "\n");
			}
		}

	}

}

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