/** * @see http://nondelion.com/archives/2009/09/16/2237 */ package { import flash.display.Sprite; import flash.text.*; import org.libspark.betweenas3.BetweenAS3; import org.libspark.betweenas3.easing.*; import org.libspark.betweenas3.tweens.ITween; import org.libspark.betweenas3.tweens.ITweenGroup; import org.libspark.betweenas3.tweens.IObjectTween; import org.libspark.betweenas3.events.TweenEvent; import net.hires.debug.Stats; [SWF(width="465", height="465", frameRate="60", backgroundColor="0x0")] public class Main extends Sprite { protected static const COL:int = 46; private var str:String = ""; private var st:SequentialText; private var txt:TextField; private var tween:ITweenGroup; public function Main() { for(var i:int=0; i<COL; i++) { str += "Wonderfl Wonderfl Wonderfl Wonderfl Wonderfl Wonderfl Wonderfl Wonderfl Wonderfl Wonderfl Wonderfl Wonderfl"; if(i < COL-1){ str += "\r"; } } txt = newTextField(); // 等速のテキストトランジションを作成 st = new SequentialText(txt, 1.6); var t1:IObjectTween = BetweenAS3.tween( st, {position: st.totalTime}, {position: 0}, st.totalTime, Quad.easeInOut); var r1:ITween = BetweenAS3.reverse(t1); // 逆再生 tween = BetweenAS3.serial(t1,r1); tween.stopOnComplete = false; // ループ設定 tween.play(); // 再生 //this.addChild(new Stats()); } private function newTextField():TextField { var tf:TextField = addChild( new TextField() ) as TextField; tf.defaultTextFormat = new TextFormat("Verdana", 8, 0xffffff); tf.text = str; tf.autoSize = TextFieldAutoSize.LEFT; tf.selectable = false; tf.x = -1; return tf; } } } import flash.events.Event; import flash.events.EventDispatcher; import flash.text.TextField; class SequentialText extends EventDispatcher { private var currentIndex:uint; private var _text:String; private var _speed:Number; private var _txt:TextField; // 再生時間 private var _totalTime:Number; public function get totalTime():Number { return _totalTime; } // 現在時刻 private var _position:Number; public function set position(val:Number):void { _position = val; update(); } // コンストラクタ public function SequentialText(tf:TextField, time:Number=1.0) { _txt = tf; _text = tf.text; _totalTime = time; _speed = _totalTime/_text.length; // 速度を求める _txt.text = ""; } private function update():void { // 現在のテキストを取得 currentIndex = Math.floor(_position/_speed); _txt.text = currentIndex > 0 ? _text.substr(0, currentIndex) : ""; // 現在のテキストが正しい文字列になったら終了 if(_totalTime <= _position) { _txt.text = _text; dispatchEvent(new Event(Event.COMPLETE)); } } }