case "bt_brightness":
temp_angle=bt_brightness.rotation;
var an:Number=Math.atan2(mouseY-bt_brightness.y,mouseX-bt_brightness.x);
var a:Number=an*(180/Math.PI);
start_angle=a;
addEventListener(Event.ENTER_FRAME,onEnterFrame);
stage.addEventListener(MouseEvent.MOUSE_UP,onMouseUpHandler);
break;
case "bt_contrast":
temp_angle=bt_contrast.rotation;
var an:Number=Math.atan2(mouseY-bt_contrast.y,mouseX-bt_contrast.x);
var a:Number=an*(180/Math.PI);
start_angle=a;
addEventListener(Event.ENTER_FRAME,onEnterFrame1);
stage.addEventListener(MouseEvent.MOUSE_UP,onMouseUpHandler);
break;

首先这是一个switch语句里的一部分，用于判断点击某个按钮，然后根据按钮的名字调用不同的效果。
case "bt_brightness"://比对按钮名
temp_angle=bt_brightness.rotation;//获取按钮旋转角度
var an:Number=Math.atan2(mouseY-bt_brightness.y,mouseX-bt_brightness.x);
var a:Number=an*(180/Math.PI);
start_angle=a;
addEventListener(Event.ENTER_FRAME,onEnterFrame);//然后让某个元件进行旋转之类的吧
stage.addEventListener(MouseEvent.MOUSE_UP,onMouseUpHandler);
break;
case "bt_contrast"://比对按钮名
temp_angle=bt_contrast.rotation;//获取按钮旋转角度
var an:Number=Math.atan2(mouseY-bt_contrast.y,mouseX-bt_contrast.x);
var a:Number=an*(180/Math.PI);
start_angle=a;
addEventListener(Event.ENTER_FRAME,onEnterFrame1);//然后让某个元件进行旋转之类的吧
stage.addEventListener(MouseEvent.MOUSE_UP,onMouseUpHandler);
break;
其实这个代码写的有些不太高效，可以进行优化