AS3 Scale9Grid ---- 9宫格类

源码：

/***************************************************** *   *  The Initial Developer of the Original Code is Jave.Lin(afeng). *   *  Scale9Grid.as *  Create By Jave.Lin(afeng) *  2012-9-5 下午2:37:14 *   *****************************************************/package testScale9Grid{import flash.display.Bitmap;import flash.display.BitmapData;import flash.display.Sprite;import flash.events.Event;import flash.geom.Point;import flash.geom.Rectangle;/** *  9宫格类 * @author Jave.Lin(afeng) **/public class Scale9Grid extends Sprite{private var _invalidate:Boolean=false;private const despoint:Point=new Point();private var _top_left_bmp:Bitmap;private var _top_bmp:Bitmap;private var _top_right_bmp:Bitmap;private var _right_bmp:Bitmap;private var _bottom_right_bmp:Bitmap;private var _bottom_bmp:Bitmap;private var _botton_left_bmp:Bitmap;private var _left_bmp:Bitmap;private var _center_bmp:Bitmap;private var _s9d:Rectangle;private var _bmd:BitmapData;public function get bmd():BitmapData{return _bmd;}private var _w:Number;private var _minW:Number;public override function get width():Number{return _w;}public override function set width(value:Number):void{if(_w!=value){_w=value;if(_w<_minW)_w=_minW;invalidate();}}private var _h:Number;private var _minH:Number;public override function get height():Number{return _h;}public override function set height(value:Number):void{if(_h!=value){_h=value;if(_h<_minH)_h=_minH;invalidate();}}public function Scale9Grid(bmd:BitmapData,s9d:Rectangle){super();_bmd=bmd;_w=bmd.width;_h=bmd.height;checkS9d(s9d);_s9d=s9d;_minW=(_s9d.x+(_bmd.width-_s9d.right)+1);_minH=(_s9d.y+(_bmd.height-_s9d.bottom)+1);cutBmd();refresh();}public function invalidate():void{_invalidate=true;removeEventListener(Event.RENDER,onRender);addEventListener(Event.RENDER,onRender);}public function refresh():void{_invalidate=false;refreshSize();layoutBmps();//graphics.clear();//drawRect(0xff0000,_top_left_bmp.getRect(this));//drawRect(0xff0000,_top_bmp.getRect(this));//drawRect(0xff0000,_top_right_bmp.getRect(this));//drawRect(0xff0000,_right_bmp.getRect(this));//drawRect(0xff0000,_bottom_right_bmp.getRect(this));//drawRect(0xff0000,_bottom_bmp.getRect(this));//drawRect(0xff0000,_botton_left_bmp.getRect(this));//drawRect(0xff0000,_left_bmp.getRect(this));//drawRect(0xff0000,_center_bmp.getRect(this));}private function onRender(event:Event):void{// TODO Auto-generated method stubif(!_invalidate)return;removeEventListener(Event.RENDER,onRender);refresh();}private function layoutBmps():void{//0、中_center_bmp.x=_s9d.x;_center_bmp.y=_s9d.y;var centerRect:Rectangle=_center_bmp.getRect(this);//1、左上_top_left_bmp.x=0;_top_left_bmp.y=0;//2、上_top_bmp.x=_s9d.x;_top_bmp.y=0;//3、右上_top_right_bmp.x=centerRect.right;_top_right_bmp.y=0;//4、右_right_bmp.x=centerRect.right;_right_bmp.y=_s9d.y;//5、右下_bottom_right_bmp.x=centerRect.right;_bottom_right_bmp.y=centerRect.bottom;//6、下_bottom_bmp.x=_s9d.x;_bottom_bmp.y=centerRect.bottom;//7、左下_botton_left_bmp.x=0;_botton_left_bmp.y=centerRect.bottom;//8、左_left_bmp.x=0;_left_bmp.y=_s9d.y;}private function refreshSize():void{var tw:Number=_w-(_left_bmp.width+_right_bmp.width);var th:Number=_h-(_top_bmp.height+_bottom_bmp.height);//上_top_bmp.width=tw;//下_bottom_bmp.width=tw;//左_left_bmp.height=th;//右_right_bmp.height=th;_center_bmp.width=tw;_center_bmp.height=th;}//private function drawRect(c:uint,rect:Rectangle):void//{////graphics.beginFill(c);////graphics.drawRect(rect.x,rect.y,rect.width,rect.height);//graphics.lineStyle(1,c);//graphics.moveTo(rect.x,rect.y);//graphics.lineTo(rect.width,rect.y);//graphics.lineTo(rect.width,rect.height);//graphics.lineTo(rect.x,rect.height);//graphics.lineTo(rect.x,rect.y);////graphics.endFill();//}private function cutBmd():void{var rect:Rectangle;//1、左上rect=new Rectangle(0,0,_s9d.x,_s9d.y);var top_left_bmd:BitmapData=new BitmapData(rect.width,rect.height,true,0);top_left_bmd.copyPixels(_bmd,rect,despoint);_top_left_bmp=new Bitmap(top_left_bmd);addChild(_top_left_bmp);//drawRect(0xff0000,rect);//2、上rect.x=_s9d.x;rect.y=0;rect.width=_s9d.width;rect.height=_s9d.y;var top_bmd:BitmapData=new BitmapData(rect.width,rect.height,true,0);top_bmd.copyPixels(_bmd,rect,despoint);_top_bmp=new Bitmap(top_bmd);addChild(_top_bmp);//drawRect(0xffff00,rect);//3、右上rect.x=_s9d.right;rect.y=0;rect.width=_bmd.width-_s9d.right;rect.height=_s9d.y;var top_right_bmd:BitmapData=new BitmapData(rect.width,rect.height,true,0);top_right_bmd.copyPixels(_bmd,rect,despoint);_top_right_bmp=new Bitmap(top_right_bmd);addChild(_top_right_bmp);//drawRect(0xffffff,rect);//4、右rect.x=_s9d.right;rect.y=_s9d.y;rect.width=_bmd.width-_s9d.right;rect.height=_s9d.height;var right_bmd:BitmapData=new BitmapData(rect.width,rect.height,true,0);right_bmd.copyPixels(_bmd,rect,despoint);_right_bmp=new Bitmap(right_bmd);addChild(_right_bmp);//drawRect(0x00ff00,rect);//5、右下rect.x=_s9d.right;rect.y=_s9d.bottom;rect.width=_bmd.width-_s9d.right;rect.height=_bmd.height-_s9d.bottom;var bottom_right_bmd:BitmapData=new BitmapData(rect.width,rect.height,true,0);bottom_right_bmd.copyPixels(_bmd,rect,despoint);_bottom_right_bmp=new Bitmap(bottom_right_bmd);addChild(_bottom_right_bmp);//drawRect(0x0000ff,rect);//6、下rect.x=_s9d.x;rect.y=_s9d.bottom;rect.width=_s9d.width;rect.height=_bmd.height-_s9d.bottom;var botton_bmd:BitmapData=new BitmapData(rect.width,rect.height,true,0);botton_bmd.copyPixels(_bmd,rect,despoint);_bottom_bmp=new Bitmap(botton_bmd);addChild(_bottom_bmp);//drawRect(0x00ffff,rect);//7、左下rect.x=0;rect.y=_s9d.bottom;rect.width=_s9d.x;rect.height=_bmd.height-_s9d.bottom;var botton_left_bmd:BitmapData=new BitmapData(rect.width,rect.height,true,0);botton_left_bmd.copyPixels(_bmd,rect,despoint);_botton_left_bmp=new Bitmap(botton_left_bmd);addChild(_botton_left_bmp);//drawRect(0xeeeeee,rect);//8、左rect.x=0;rect.y=_s9d.y;rect.width=_s9d.x;rect.height=_s9d.height;var left_bmd:BitmapData=new BitmapData(rect.width,rect.height,true,0);left_bmd.copyPixels(_bmd,rect,despoint);_left_bmp=new Bitmap(left_bmd);addChild(_left_bmp);//drawRect(0x222222,rect);//9、中var center_bmd:BitmapData=new BitmapData(_s9d.width,_s9d.height,true,0);center_bmd.copyPixels(_bmd,_s9d,despoint);_center_bmp=new Bitmap(center_bmd);addChild(_center_bmp);//drawRect(0x99ff55,_s9d);}private function checkS9d(s9d:Rectangle):void{s9d.x=Math.floor(s9d.x);s9d.y=Math.floor(s9d.y);s9d.width=Math.ceil(s9d.width);s9d.height=Math.ceil(s9d.height);var error:Boolean=false;var errorMsg:String='';if(s9d.x<1){error=true;errorMsg+='s9d.x<1';}if(s9d.y<1){error=true;errorMsg+='s9d.y<1';}if((s9d.x+s9d.width)>(bmd.width-1)){error=true;errorMsg+='(s9d.x+s9d.width)>(bmd.width-1)';}if((s9d.y+s9d.height)>(bmd.height-1)){error=true;errorMsg+='(s9d.y+s9d.height)>(bmd.height-1)';}if(error)throw new Error("s9d error!!!:\n"+errorMsg);}}}

天地会贴：

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