UIComponent 以及子类的 背景 网格

所有继承 UIComponent的组件要想背景为方格.可以使用图片.然后拓展.或者 override updateDisplayList方法如下:

 

 

public static const SQUARE_SIZE:Number = 40;//方格的尺寸

/**
 * 填充背景的方格
 */
override protected function updateDisplayList(unscaledWidth:Number, unscaledHeight:Number):void{
	var g:Graphics = this.graphics;
	g.beginFill(0x000000 , 0);
	g.drawRect(0 , 0 , unscaledWidth , unscaledHeight);
	g.endFill();
	g.lineStyle(1 , 0x000000 , 0.1);
	for(var row:Number=0;row<unscaledHeight/SQUARE_SIZE;row++){
		g.moveTo(0 , row*SQUARE_SIZE);
		g.lineTo(unscaledWidth , row*SQUARE_SIZE);
	}
	for(var col:Number=0;col<unscaledWidth/SQUARE_SIZE;col++){
		g.moveTo(col*SQUARE_SIZE , 0);
		g.lineTo(col*SQUARE_SIZE , unscaledHeight);
	}
}