[iNils]

function setMaxFontSize (txt:TextField):Number {
	var fmt:TextFormat = txt.getTextFormat ();
	if (txt.text.length > 1) {
		while (txt.maxscroll == 1 && fmt.size < 128) {
			fmt.size *= 2;
			txt.setTextFormat (fmt);
		}
		fmt.size /= 2;
		var a:Number = fmt.size;
		var b:Number = fmt.size * 2;
		var c:Number = a + Math.floor ((b - a) / 2);
		txt.setTextFormat (fmt);
		while (b - a > 1) {
			fmt.size = c;
			txt.setTextFormat (fmt);
			if (txt.maxscroll == 1) {
				a = c;
				c = c + Math.floor ((b - c) / 2);
			} else {
				b = c;
				c = a + Math.floor ((c - a) / 2);
			}
		}
		fmt.size = c;
		txt.setTextFormat (fmt);
	}
	return c;
}
function sample () {
	txt1.text += String.fromCharCode (32 + Math.floor (Math.random () * 60));
	trace (setMaxFontSize (txt1));
}
var txt1:TextField = this.createTextField ("txt1", 1, 100, 100, 200, 200);
txt1.border = true;
txt1.multiline = true;
txt1.wordWrap = true;
txt1.text = "";
setInterval(this, "sample", 100);