效果演示：
使图标具有交互性：
当鼠标单击某个图标时使之旋转，并让图标显示在屏幕的最前面。
//定义旋转的最终角度
var endAngle:Number = 90;
//保存已经旋转的角度
var tempAngle:Number = 0;
//保存旋转的状态
var isRotating:Boolean = true;
//注册图标的单击事件
mc.addEventListener(MouseEvent.MOUSE_DOWN,startRotation);
//定义侦听器函数
function startRotation(e:MouseEvent):void
{
//得到图标
var currentIcon::MovieClip = e.target;
//得到图标的角度
enaAngle = atan2D(currentIcon.y,cosD(currentIcon.angle) * disy);
//计算旋转的度数
endAngle = (endAngle > -180&&endAngle < -90) ? - 270 - endAngle:90 - endAngle;
//单击后旋转，需要注册enterFrame事件侦听器
menu.addEventListener(Event.ENTER_FRAME,moveMenu);
}
每次旋转前要重新初始化旋转角度
function initAngle(b:Boolean)
{
//如果处于旋转状态保存角度
if (isRotating)
//保存图标角度
tempAngle += speed;
//旋转速度重新设置为0
speed = 0;
//设置旋转状态
isRotating = b;
}
修改函数moveMenu():
function moveMenu(e:Event):void
{
var iconCount:int = menu,numChildren;
var depthArrat:Array = new Array();
var angle:Number = 360 / iconCount;
for (var z:int; z < iconCount; z++)
{
var mc:MovieClip = menu.getChildAt(z);
mc.gotoAndStop(z + 1);
//把图标角度保存在mc的动态属性中
mc.angle = tempAngle + speed + angle * z;
mc.x = cosD(mc.angle) * disy;
mc.y = sinD(mc.angle) * disy;
depthArray[z] = mc;
setProp(mc, "alpha");
setProp(mc, "scaleX", .2, .7);
setProp(mc, "scaleY", .2, .7);
}
arrange(depthArray);
//利用缓冲公式把图标旋转到endAngle角度
speed += (endAngle - speed) * .2;
if (Math.abs(speed - endAngle) < 1)
{
//移除事件侦听器
menu.removeEventListener(Event.ENTER_FRAME,moveMenu);
initAngle(false);
}
}
下面给出完整代码
include "Math2.as"
stage.frameRate = 30;
var disx:Number = 200;
var disy:Number = 10;
var speed:Number = 0;
var endAngle:Number = 90;
var tempAngle:Number = 0;
var isRotating:Boolean = true;
var menu:Sprite = new Sprite();
menu.x = 300;
menu.y = 200;
menu.addEventListener(Event.ENTER_FRAME,moveMenu);
this.addChild(menu);
initMenu(5);
function initMenu(n:int) {
for (var i:int; i
var mc:MovieClip = new IconMenu();
mc.scaleX = mc.scaleY = .5;
mc.addEventListener(MouseEvent.MOUSE_DOWN,startRotation);
menu.addChild(mc);
}
}
function initAngle(b:Boolean) {
if (isRotating) {
tempAngle += speed;
}
speed = 0;
isRotating = b;
}
function startRotation(e:MouseEvent):void {
var currentIcon:MovieClip = e.target;
endAngle = atan2D(currentIcon.y,cosD(currentIcon.angle)*disy);
endAngle = (endAngle> -180&&endAngle < -90)? -270 - endAngle:90 - endAngle;
initAngle(true);
menu.addEventListener(Event.ENTER_FRAME,moveMenu);
}
function moveMenu(e:Event):void {
var iconCount:int = menu.numChildren;
var depthArray:Array = new Array();
var angle:Number = 360 / iconCount;
for (var z:int; z
var mc:MovieClip = menu.getChildAt(z);
mc.gotoAndStop(z + 1);
mc.angle = tempAngle + speed+angle * z;
mc.x = cosD(mc.angle) * disx;
mc.y = sinD(mc.angle) * disy;
depthArray[z] = mc;
setProp(mc,"alpha");
setProp(mc,"scaleX",.2,.7);
setProp(mc,"scaleY",.2,.7);
}
arrange(depthArray);
speed += (endAngle-speed) * .2;
if (Math.abs(speed - endAngle) < 1) {
menu.removeEventListener(Event.ENTER_FRAME,moveMenu);
initAngle(false);
}
}
function arrange(depthArray:Array):void {
depthArray.sortOn("y", Array.NUMERIC);
var i:int = depthArray.length;
while (i--) {
menu.setChildIndex(depthArray[i], i);
}
}
function setProp(mc:MovieClip,prop:String,n1:Number = .5, n2:Number = 1):void {
mc[prop] = ((mc.y + 2 * disy) / disy - 1) / 2 * (n2 - n1) + n1;
}
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