用Flash AS3制作统计饼图动画效果

代码如下： /**

* @class:DrawPieGraph(画饼状图)

* @author:ycccc8202

* @date:2007.8.16

* @example:

* import com.ycccc.Graphics.*;

* var dataList:Array=[10,10,10,100,10,10,10,100];

* var pie:DrawPieGraph=new DrawPieGraph(200,200,150,90,15,dataList,[0xFF0F00,0xFF6600,0xFF9E01,0xFCD202,0xF8FF01,0xB0DE09,0x04D215,0x0D8ECF],.7);

* addChild(sprite);

*/

package com.ycccc.Graphics{

import fl.transitions.Tween;

import fl.transitions.easing.*;

import fl.transitions.TweenEvent;

import flash.display.MovieClip;

import flash.display.Sprite;

import flash.display.Shape;

import flash.display.Graphics;

import flash.events.MouseEvent;

public class DrawPieGraph extends MovieClip {

//存放shape对象

private var __contain:Object;

//设置角度从-90开始

private var R:int=-90;

private var D:uint=20;

private var _shape:Shape;

//初始饼图的圆心位置

private var _x0:Number;

private var _y0:Number;

//椭圆饼图的长轴与短轴长度

private var _a:Number;

private var _b:Number;

//饼图的厚度

private var _h:Number;

//透明度

private var _alpha:Number

//数据列表

private var _dataList:Array;

private var _colorList:Array;

private var _angleList:Array;

private var _depthList:Array;

//

/**

*@param:x0......>圆心x坐标

*@param:y0......>圆心y坐标

*@param:a......>长轴

*@param:b......>短轴

*@param:h......>厚度

*@param:dataList......>数据列表

*@param:dataList......>颜色列表

*@alpha:Number......>透明度,默认为1.0

*/

public function DrawPieGraph(x0:Number,y0:Number,a:Number,b:Number,h:Number,

dataList:Array,colorList:Array,alpha:Number=1.0) {

_x0=x0;

_y0=y0;

_a=a;

_b=b;

_h=h;

_alpha=alpha

_dataList=dataList;

_colorList=colorList;

setAngleList();

drawPie();

setDepths();

}

private function setAngleList():void {

_angleList=[];

var totalData:int;

var len:uint=_dataList.length;

for (var j:uint=0; j < len; j++) {

totalData+= _dataList[j];

}

for (j=0; j < len; j++) {

if (j == len - 1) {

_angleList.push([R,270]);

} else {

var r:uint=Math.floor(_dataList[j] / totalData * 360);

var posR:int=R + r;

_angleList.push([R,posR]);

R=posR;

trace(r+"___r");

trace(R);

}

}

trace(_angleList + ":::");

}

private function setDepths():void {

_depthList=[];

var len:uint=_angleList.length;

for (var j:uint=0; j < len; j++) {

var minJ:Number=_angleList[j][0];

var maxJ:Number=_angleList[j][1];

switch (true) {

case minJ >= -90 && minJ <= 90 && maxJ<=90 :

_depthList[j]=minJ;

break;

default :

_depthList[j]=1000-minJ;

}

}//end for

trace(_depthList + "::::_depthList");

_depthList=_depthList.sort(Array.NUMERIC | Array.RETURNINDEXEDARRAY);

trace(_depthList);

for (j=0; j<len; j++) {

setChildIndex(__contain["shape"+_depthList[j]],j);

}

}

private function drawPie():void {

__contain={};

var len:uint=_angleList.length;

var step:uint=1;

for (var j:uint=0; j < len; j++) {

__contain["shape"+j]=new MovieClip;

//设置中心角，方便以下进行点中移动

__contain["shape"+j].r=(_angleList[j][0]+_angleList[j][1])/2;

__contain["shape" + j].addEventListener(MouseEvent.MOUSE_DOWN,onMouseDownX);

addChild(__contain["shape"+j]);

var drakColor:uint=getDarkColor(_colorList[j]);//深色

var g:Graphics=__contain["shape"+j].graphics;

//g.lineStyle(1);

//先画底

//内弧

g.beginFill(_colorList[j],_alpha);

g.moveTo(_x0,_y0+_h);

var r:Number=_angleList[j][0];

var minR:Number=r;

var maxR:int=_angleList[j][1];

while (r + step < maxR) { g.lineTo(getRPoint(_x0,_y0 + _h,_a,_b,r).x,getRPoint(_x0,_y0 + _h,_a,_b,r).y);

r+= step;

}

g.lineTo(getRPoint(_x0,_y0 + _h,_a,_b,maxR).x,getRPoint(_x0,_y0 + _h,_a,_b,maxR).y);

//

g.endFill();

//画内侧面

g.beginFill(drakColor,_alpha);

g.moveTo(_x0,_y0+_h);

g.lineTo(getRPoint(_x0,_y0 + _h,_a,_b,minR).x,getRPoint(_x0,_y0 + _h,_a,_b,minR).y);

g.lineTo(getRPoint(_x0,_y0,_a,_b,minR).x,getRPoint(_x0,_y0,_a,_b,minR).y);

g.lineTo(_x0,_y0);

g.endFill();

//画外侧面

g.beginFill(drakColor,_alpha);

g.moveTo(_x0,_y0+_h);

g.lineTo(getRPoint(_x0,_y0 + _h,_a,_b,maxR).x,getRPoint(_x0,_y0 + _h,_a,_b,maxR).y);

g.lineTo(getRPoint(_x0,_y0,_a,_b,maxR).x,getRPoint(_x0,_y0,_a,_b,maxR).y);

g.lineTo(_x0,_y0);

g.endFill();

//画外弧侧面

g.beginFill(drakColor,_alpha);

//g.lineStyle(1);

g.moveTo(getRPoint(_x0,_y0 + _h,_a,_b,minR).x,getRPoint(_x0,_y0 + _h,_a,_b,minR).y);

g.lineTo(getRPoint(_x0,_y0,_a,_b,minR).x,getRPoint(_x0,_y0,_a,_b,minR).y);

r=minR;

while (r + step < maxR) {

r+= step;

g.lineTo(getRPoint(_x0,_y0,_a,_b,r).x,getRPoint(_x0,_y0,_a,_b,r).y);

}

g.lineTo(getRPoint(_x0,_y0,_a,_b,maxR).x,getRPoint(_x0,_y0,_a,_b,maxR).y);

g.lineTo(getRPoint(_x0,_y0 + _h,_a,_b,maxR).x,getRPoint(_x0,_y0 + _h,_a,_b,maxR).y);

while (r - step > minR) {

g.lineTo(getRPoint(_x0,_y0 + _h,_a,_b,r).x,getRPoint(_x0,_y0 + _h,_a,_b,r).y);

r-= step;

}

g.lineTo(getRPoint(_x0,_y0 + _h,_a,_b,minR).x,getRPoint(_x0,_y0 + _h,_a,_b,minR).y);

g.endFill();

//画上表面

g.beginFill(_colorList[j],_alpha);

g.moveTo(_x0,_y0);

r=minR;

while (r + step < maxR) {

g.lineTo(getRPoint(_x0,_y0,_a,_b,r).x,getRPoint(_x0,_y0,_a,_b,r).y);

r+= step;

}

g.lineTo(getRPoint(_x0,_y0,_a,_b,maxR).x,getRPoint(_x0,_y0,_a,_b,maxR).y);

g.endFill();

}

}

private function onMouseDownX(e:MouseEvent):void {

var TG:MovieClip=e.target as MovieClip;

var posX:int=getRPoint(0,0,D,D,TG.r).x;

var posY:int=getRPoint(0,0,D,D,TG.r).y;

if (TG.x==0 || TG.y==0) {

TG.removeEventListener(MouseEvent.MOUSE_DOWN,onMouseDownX);

var tween1=new Tween(TG,"x",Bounce.easeOut,0,posX,1,true);

var tween2=new Tween(TG,"y",Bounce.easeOut,0,posY,1,true);

tween1.addEventListener(TweenEvent.MOTION_FINISH,onMotionFinish);

} else {

TG.removeEventListener(MouseEvent.MOUSE_DOWN,onMouseDownX);

var tween3=new Tween(TG,"x",Bounce.easeOut,TG.x,0,1,true);

var tween4=new Tween(TG,"y",Bounce.easeOut,TG.y,0,1,true);

tween3.addEventListener(TweenEvent.MOTION_FINISH,onMotionFinish);

}

}

private function onMotionFinish(e:TweenEvent):void {

var TG:MovieClip=e.currentTarget.obj as MovieClip;

TG.addEventListener(MouseEvent.MOUSE_DOWN,onMouseDownX);

}

private function getDarkColor(color:uint):uint {

var r:uint=color >> 16 & 0xFF / 1.3;

var g:uint=color >> 8 & 0xFF / 1.3;

var b:uint=color & 0xFF /1.1;

return r << 16 | g << 8 | b;

}

private function getRPoint(x0:Number,y0:Number,a:Number,b:Number,r:Number):Object {

r=r * Math.PI / 180;

return {x:Math.cos(r) * a + x0,y:Math.sin(r) * b + y0};

}

public function get contain():Object {

return __contain;

}

}

}

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