[AS3]as3压缩位图BitmapData.encode用法源代码示例(3)

Button.as

package com.vini123.tool 
{ 
    import flash.display.Sprite; 
    import flash.events.MouseEvent; 
    import flash.text.TextField; 
    import flash.text.TextFieldAutoSize; 
    import flash.text.TextFormat; 
     
    public class Button extends Sprite 
    { 
        private var _txtFormat:TextFormat; 
        private var _txt:TextField 
        private var _bottom:Sprite; 
        private var _gap:int =7; 
         
        public function Button(label:String):void 
        { 
            _txtFormat = new TextFormat(); 
            _txtFormat.size = 13; 
            _txtFormat.color = 0xADD0FC; 
             
            _txt = new TextField(); 
            _txt.text = label; 
            _txt.autoSize = TextFieldAutoSize.LEFT; 
            _txt.setTextFormat(_txtFormat); 
            _txt.mouseEnabled = false; 
            addChild(_txt); 
             
            _bottom = new Sprite(); 
            _bottom.graphics.lineStyle(1.0,0x2D72B5); 
            _bottom.graphics.beginFill(0x0099ff,1); 
            _bottom.graphics.drawRoundRect(0,0,_txt.textWidth + _gap *2,_txt.textHeight + _gap,5,5); 
            _bottom.graphics.endFill(); 
            addChildAt(_bottom,0); 
             
            _txt.x = _gap; 
            _txt.y = _gap * 0.5 -1; 
             
            this.addEventListener(MouseEvent.ROLL_OVER,overHandler); 
            this.addEventListener(MouseEvent.ROLL_OUT,outHandler); 
        } 
         
        private function overHandler(e:MouseEvent):void 
        { 
            _txt.alpha = 0.65; 
        } 
         
        private function outHandler(e:MouseEvent):void 
        { 
            _txt.alpha = 1; 
        } 
         
        public function dispose():void 
        { 
            _bottom.graphics.clear(); 
            this.removeEventListener(MouseEvent.ROLL_OVER,overHandler); 
            this.removeEventListener(MouseEvent.ROLL_OUT,outHandler); 
            if(this.parent) 
            { 
                this.parent.removeChild(this); 
            } 
        } 
    } 
}