效果演示:
使圖標具有交互性:
當鼠標單擊某個圖標時使之旋轉,並讓圖標顯示在屏幕的最前面。
//定義旋轉的最終角度
var endAngle:Number = 90;
//保存已經旋轉的角度
var tempAngle:Number = 0;
//保存旋轉的狀態
var isRotating:Boolean = true;
//注冊圖標的單擊事件
mc.addEventListener(MouseEvent.MOUSE_DOWN,startRotation);
//定義偵聽器函數
function startRotation(e:MouseEvent):void
{
//得到圖標
var currentIcon::MovieClip = e.target;
//得到圖標的角度
enaAngle = atan2D(currentIcon.y,cosD(currentIcon.angle) * disy);
//計算旋轉的度數
endAngle = (endAngle > -180&&endAngle < -90) ? - 270 - endAngle:90 - endAngle;
//單擊後旋轉,需要注冊enterFrame事件偵聽器
menu.addEventListener(Event.ENTER_FRAME,moveMenu);
}
每次旋轉前要重新初始化旋轉角度
function initAngle(b:Boolean)
{
//如果處於旋轉狀態保存角度
if (isRotating)
//保存圖標角度
tempAngle += speed;
//旋轉速度重新設置為0
speed = 0;
//設置旋轉狀態
isRotating = b;
}
修改函數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);
//把圖標角度保存在mc的動態屬性中
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);
//利用緩沖公式把圖標旋轉到endAngle角度
speed += (endAngle - speed) * .2;
if (Math.abs(speed - endAngle) < 1)
{
//移除事件偵聽器
menu.removeEventListener(Event.ENTER_FRAME,moveMenu);
initAngle(false);
}
}
下面給出完整代碼
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;
}