스크롤

/**
 * Copyright SkywaveTM ( http://wonderfl.net/user/SkywaveTM )
 * MIT License ( http://www.opensource.org/licenses/mit-license.php )
 * Downloaded from: http://wonderfl.net/c/5fHF
 */

/*

 scrollRect에 왜 바로 접근하지 못하고 저렇게 새로 만들고 보내줘야 하는지 이해가 안감...

*/



package {
    import flash.display.Sprite;
    public class FlashTest extends Sprite {
        public function FlashTest() {
            import flash.events.MouseEvent; 
            import flash.geom.Rectangle; 
            import flash.text.TextField;
            import flash.display.Graphics;
            import flash.display.Shape;

            var bigText:TextField = new TextField();
            bigText.text = "2wqedsrwfeds2wqedsrwfeds2wqedsrwfeds2wqedsrwfeds2wqedsrwfeds2wqedsrwfeds2wqedsrwfeds2wqedsrwfeds2wqedsrwfeds2wqedsrwfeds"
            bigText.border = true;
            bigText.wordWrap = true;
            this.addChild(bigText);
            
            var upg:Shape = new Shape();
            var downg:Shape = new Shape();
            var up:Sprite = new Sprite();
            var down:Sprite = new Sprite();
            
            up.buttonMode = true;
            down.buttonMode = true;
            
            
            upg.graphics.beginFill(0xAAAAAA);
            downg.graphics.beginFill(0xAAAAAA);
            upg.graphics.drawCircle(300, 100, 30);
            downg.graphics.drawCircle(300, 300, 30);
            
            up.addChild(upg);
            down.addChild(downg);
            
            this.addChild(up);
            this.addChild(down);
            
            
            
 //------------------------------------------------------------//
            // Define the initial viewable area of the TextField instance: 
            // left: 0, top: 0, width: TextField's width, height: 350 pixels. 
            bigText.scrollRect = new Rectangle(0, 0, bigText.width+1, 40); 
             
           // called when the "up" button is clicked 
            function scrollUp(event:MouseEvent):void 
            { 
                // Get access to the current scroll rectangle. 
                var rect:Rectangle = bigText.scrollRect; 
                // Decrease the y value of the rectangle by 20, effectively  
                // shifting the rectangle down by 20 pixels. 
                rect.y -= 20; 
                // Reassign the rectangle to the TextField to "apply" the change. 
                bigText.scrollRect = rect; 
            } 
             
            // called when the "down" button is clicked  
            function scrollDown(event:MouseEvent):void 
            { 
                // Get access to the current scroll rectangle. 
                var rect:Rectangle = bigText.scrollRect; 
                // Increase the y value of the rectangle by 20, effectively  
                // shifting the rectangle up by 20 pixels. 
                rect.y += 20; 
                // Reassign the rectangle to the TextField to "apply" the change. 
                bigText.scrollRect = rect; 
            } 
             
            up.addEventListener(MouseEvent.CLICK, scrollUp); 
            down.addEventListener(MouseEvent.CLICK, scrollDown);
            
        }
    }
}