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drawPrize_html
/
index.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>中科华洋高交会抽奖系统</title>

<link href="style.css" rel="stylesheet" type="text/css">

<script type="text/javascript" src="js/jquery-1.10.2.js"></script>
<script type="text/javascript" src="js/awardRotate.js"></script>
<script type="text/javascript" src="common/toogle.js"></script>

<script type="text/javascript">
var turnplate={
		restaraunts:[],				//大转盘奖品名称
		colors:[],					//大转盘奖品区块对应背景颜色
		outsideRadius:192,			//大转盘外圆的半径
		textRadius:155,				//大转盘奖品位置距离圆心的距离
		insideRadius:68,			//大转盘内圆的半径
		startAngle:0,				//开始角度

		bRotate:false				//false:停止;ture:旋转
};

$(document).ready(function(){
	getMyPrize();
	//动态添加大转盘的奖品与奖品区域背景颜色
	turnplate.restaraunts = ["特等奖挂壁新风机", "参与奖USBLED灯", "一等奖空气净化器", "参与奖USBLED灯", "三等奖蓝牙音箱", "参与奖USBLED灯 ", "二等奖空气净化器", "参与奖USBLED灯", "三等奖蓝牙音箱","参与奖USBLED灯"];
	turnplate.colors = ["#F8553D", "#FFFFFF", "#50BDC4","#FFFFFF", "#70A1C7", "#FFFFFF", "#FFCB8D","#FFFFFF", "#70A1C7","#FFFFFF"];
    turnplate.fontcolors=["#FFFFFF","#16BD84","#FFFFFF","#16BD84","#FFFFFF","#16BD84","#DE7E0F","#16BD84","#FFFFFF","#16BD84"]

	var rotateTimeOut = function (){
		$('#wheelcanvas').rotate({
			angle:0,
			animateTo:2160,
			duration:8000,
			callback:function (){
				alert('网络超时，请检查您的网络设置！');
			}
		});
	};

	$('.pointer').click(function (){
		if(turnplate.bRotate)return;
		turnplate.bRotate = !turnplate.bRotate;
		getPrizeIndex();
		//获取随机数(奖品个数范围内)
		//var item = rnd(1,turnplate.restaraunts.length);
		//奖品数量等于10,指针落在对应奖品区域的中心角度[252, 216, 180, 144, 108, 72, 36, 360, 324, 288]
		//rotateFn(item, turnplate.restaraunts[item-1]);
		/* switch (item) {
			case 1:
				rotateFn(252, turnplate.restaraunts[0]);
				break;
			case 2:
				rotateFn(216, turnplate.restaraunts[1]);
				break;
			case 3:
				rotateFn(180, turnplate.restaraunts[2]);
				break;
			case 4:
				rotateFn(144, turnplate.restaraunts[3]);
				break;
			case 5:
				rotateFn(108, turnplate.restaraunts[4]);
				break;
			case 6:
				rotateFn(72, turnplate.restaraunts[5]);
				break;
			case 7:
				rotateFn(36, turnplate.restaraunts[6]);
				break;
			case 8:
				rotateFn(360, turnplate.restaraunts[7]);
				break;
			case 9:
				rotateFn(324, turnplate.restaraunts[8]);
				break;
			case 10:
				rotateFn(288, turnplate.restaraunts[9]);
				break;
		} */
		//console.log(item);
	});
});


function exchagePrize(){
	var id  = $("#prizeRecordId").val();
	//alert("id="+id);
	$.ajax({
			type: 'POST',
			url: urlConfig.shost+"/prize/exchange",
			data: "id="+id,
			dataType: 'json',
			success: function (data) {
				if(200==data.status){
					if(null!=data.data&&undefined!=data.data){
						alert(data.data.msg);
					}
				}else{
					alert(data.msg)
				}
			},
			error: function () {
				alert("出错了,请重试!");
			}
    	});
}

function getOpenId(){
	var prizehref = window.location.href;
	var len = prizehref.indexOf("openId=");
	if(len>=0){
		var openId = prizehref.substring(len+"openId=".length,prizehref.length);
		//alert(openId);
		return openId;
	}
	return null;
}

function getMyPrize(){

	var openId = getOpenId();
	if(null!=openId){
		$.ajax({
			type: 'POST',
			url: urlConfig.shost+"/prize/getPrizeRecord",
			data: "openId="+openId,
			dataType: 'json',
			content:'application/x-www-form-urlencoded',
			success: function (res) {
				if(200==res.status){
					if(null!=res.data&&undefined!=res.data){
						var prizeStatus = '';
						if(400==res.data.isExchange){
							prizeStatus = '未领取';
						}else if(401==res.data.isExchange){
							prizeStatus = '已领取';
						}else{
							prizeStatus = '---';
						}
						$("#myprize").css("display","");
						$("#myprize").find("ul").eq(0).html(
							"<li>奖品：【"+res.data.desc+"】&nbsp;&nbsp;"+res.data.name+"</li>"+
							"<li>兑奖码："+res.data.id+"</li>"+
							"<li>状态："+prizeStatus+"</li>"+
							"<li>获奖时间："+res.data.prizetime+"</li>"
						);
						//console.log(res.data.id);
						$("#prizeRecordId").val(res.data.id);
						//console.log($("#prizeRecordId").val());
					}

					//console.log(res)
					//alert($("#prizeRecordId").val());
				}else{
					alert(res.msg)
				}
			},
			error: function () {
				alert("出错了,请重试!");
			}
    	});
	}else{
		alert("出错了,请重试!");
	}
}

//旋转转盘 item:奖品位置; txt：提示语;
var rotateFn = function (item, txt){
		var angles = item * (360 / turnplate.restaraunts.length) - (360 / (turnplate.restaraunts.length*2));
		if(angles<270){
			angles = 270 - angles;
		}else{
			angles = 360 - angles + 270;
		}
		$('#wheelcanvas').stopRotate();
		$('#wheelcanvas').rotate({
			angle:0,
			animateTo:angles+1800,
			duration:8000,
			callback:function (){
                //alert(txt);
                if(item==2){//参与奖USB LED灯1支

                    $(".carry").css("display","block").css("background","url(images/USB.png)");
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');
                    //width: 100%;height: 25rem;position: fixed;top: 15%;
                    $(".carry").css("width","100%").css("height","25rem");
                }else if(item==1){//特等奖挂壁新风机一台
                    $(".carry").css("display","block").css("background","url(images/XINF.png)");
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');;
                    $(".carry").css("width","100%").css("height","25rem");
                }else if(item==4){//参与奖USB LED灯1支
                    $(".carry").css("display","block").css("background","url(images/USB.png)")
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');;
                    $(".carry").css("width","100%").css("height","25rem");
                }else if(item==3){//一等奖空气净化器森悦系列Lux
                    $(".carry").css("display","block").css("background","url(images/Lux.png)");
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');;
                    $(".carry").css("width","100%").css("height","25rem");
                }else if(item==6){//参与奖USB LED灯1支
                    $(".carry").css("display","block").css("background","url(images/USB.png)")
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');;
                    $(".carry").css("width","100%").css("height","25rem");
                }else if(item==5){//三等奖蓝牙音箱一台
                    $(".carry").css("display","block").css("background","url(images/LANYA.png)");
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');;
                    $(".carry").css("width","100%").css("height","25rem");
                }else if(item==8){//参与奖USB LED灯1支
                    $(".carry").css("display","block").css("background","url(images/USB.png)")
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');;
                    $(".carry").css("width","100%").css("height","25rem");
                }else if(item==7){//二等奖空气净化器森悦系列Wit
                    $(".carry").css("display","block").css("background","url(images/Wit.png)");
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');;
                    $(".carry").css("width","100%").css("height","25rem");
                }else if(item==10){//参与奖USB LED灯1支
                    $(".carry").css("display","block").css("background","url(images/USB.png)")
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');;
                    $(".carry").css("width","100%").css("height","25rem");
                }else if(item==9){//三等奖蓝牙音箱一台
                    $(".carry").css("display","block").css("background","url(images/LANYA.png)");
                    $(".carry").css("background-size","100%").css("background-repeat","no-repeat").css("position","fixed").css("top",'15%');;
                    $(".carry").css("width","100%").css("height","25rem");
                }
				turnplate.bRotate = !turnplate.bRotate;
			}
		});
	};

function runPrize(item){
	switch (item) {
		case 1:
			rotateFn(1, turnplate.restaraunts[0]);
			break;
		case 2:
			rotateFn(2, turnplate.restaraunts[1]);
			break;
		case 3:
			rotateFn(3, turnplate.restaraunts[2]);
			break;
		case 4:
			rotateFn(4, turnplate.restaraunts[3]);
			break;
		case 5:
			rotateFn(5, turnplate.restaraunts[4]);
			break;
		case 6:
			rotateFn(6, turnplate.restaraunts[5]);
			break;
		case 7:
			rotateFn(7, turnplate.restaraunts[6]);
			break;
		case 8:
			rotateFn(8, turnplate.restaraunts[7]);
			break;
		case 9:
			rotateFn(9, turnplate.restaraunts[8]);
			break;
		case 10:
			rotateFn(10, turnplate.restaraunts[9]);
			break;
	}
	//console.log(item);
}

function getPrizeIndex() {
	var rndd =  rnd(1,100000);
	var openId = getOpenId();
	//测试代码，正式需要去掉
	//if("oVuEK0jJTMYHFSNmi01FOotk9D0E"==openId){
		//openId = openId+rndd;
	//}
	//测试代码，正式需要去掉
	if(null!=openId){
		$.ajax({
			type: 'POST',
			url: urlConfig.shost+"/prize/getPrize",
			data: "openId="+openId,
			dataType: 'json',
			success: function (data) {
				if(200==data.status){
					$("#prizeRecordId").val(data.data.exchangeNum);
					runPrize(data.data.prizeIndex);
				}else{
					turnplate.bRotate = !turnplate.bRotate;
					alert(data.msg)
				}
			},
			error: function () {
				alert("出错了,请重试!");
			}
    	});
	}else{
		alert("出错了,请重试!");
	}

}

function rnd(n, m){
	var random = Math.floor(Math.random()*(m-n+1)+n);
	return random;

}


//页面所有元素加载完毕后执行drawRouletteWheel()方法对转盘进行渲染
window.onload=function(){
	drawRouletteWheel();
};

function drawRouletteWheel() {
  var canvas = document.getElementById("wheelcanvas");
  if (canvas.getContext) {
	  //根据奖品个数计算圆周角度
	  var arc = Math.PI / (turnplate.restaraunts.length/2);
	  var ctx = canvas.getContext("2d");
	  //在给定矩形内清空一个矩形
	  ctx.clearRect(0,0,422,422);
	  //strokeStyle 属性设置或返回用于笔触的颜色、渐变或模式

	  //font 属性设置或返回画布上文本内容的当前字体属性
	  ctx.font = '16px Microsoft YaHei';
	  for(var i = 0; i < turnplate.restaraunts.length; i++) {
		  var angle = turnplate.startAngle + i * arc;
          ctx.fillStyle = turnplate.colors[i];
          ctx.strokeStyle = "#FFBE04";
		  ctx.beginPath();
		  //arc(x,y,r,起始角,结束角,绘制方向) 方法创建弧/曲线（用于创建圆或部分圆）
		  ctx.arc(211, 211, turnplate.outsideRadius, angle, angle + arc, false);
		  ctx.arc(211, 211, turnplate.insideRadius, angle + arc, angle, true);
		  ctx.stroke();
		  ctx.fill();
		  //锁画布(为了保存之前的画布状态)
		  ctx.save();

		  //----绘制奖品开始----
		  //ctx.fillStyle = "#16BD84";
          var text = turnplate.restaraunts[i];
		  ctx.fillStyle = turnplate.fontcolors[i];

		  var line_height = 25;
		  //translate方法重新映射画布上的 (0,0) 位置
		  ctx.translate(211 + Math.cos(angle + arc / 2) * turnplate.textRadius, 211 + Math.sin(angle + arc / 2) * turnplate.textRadius);

		  //rotate方法旋转当前的绘图
		  ctx.rotate(angle + arc / 2 + Math.PI / 2);

		  /** 下面代码根据奖品类型、奖品名称长度渲染不同效果，如字体、颜色、图片效果。(具体根据实际情况改变) **/
		  if(text.indexOf("M")>0){//流量包
			  var texts = text.split("M");
			  for(var j = 0; j<texts.length; j++){
				  ctx.font = j == 0?'bold 20px Microsoft YaHei':'16px Microsoft YaHei';
				  if(j == 0){
					  ctx.fillText(texts[j]+"M", -ctx.measureText(texts[j]+"M").width / 2, j * line_height);
				  }else{
					  ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
				  }
			  }
          }else if(text.indexOf("M") == -1 && text.length>3){//奖品名称长度超过一定范围

			  text = text.substring(0,3)+"||"+text.substring(3);
              var texts = text.split("||");
              //console.log(texts);
			  for(var j = 0; j<texts.length; j++){
				  ctx.fillText(texts[j], -ctx.measureText(texts[j]).width / 2, j * line_height);
              }

          }
          else{
			  //在画布上绘制填色的文本。文本的默认颜色是黑色
			  //measureText()方法返回包含一个对象，该对象包含以像素计的指定字体宽度
			  ctx.fillText(text, -ctx.measureText(text).width / 2, 0);
		  }

		 //添加对应图标
          if(text.indexOf("一等") >=0){
            ctx.fillText("Lux系列", -27, 45)

          }else if(text.indexOf("二等") >=0){
            ctx.fillText("Wit系列", -27, 45)

          }else if(text.indexOf("特等") >=0){
            ctx.fillText("1台", -15, 45)

          }else if(text.indexOf("三等") >=0){
            ctx.fillText("1台", -15, 45)

          }
		  else if(text.indexOf("参与奖")>=0){
			//    var img= document.getElementById("sorry-img");
			//   img.onload=function(){
            //       //ctx.drawImage(img,-15,10);
            //       ctx.fillText("一支")
			//   };
            //   //ctx.drawImage(img,-15,10);
            //   ctx.fillText("一支")
            ctx.fillText("1支", -15, 45)
		  }
		  //把当前画布返回（调整）到上一个save()状态之前
		  ctx.restore();
		  //----绘制奖品结束----
	  }
  }
}

</script>
</head>
<body style="background:#EEEEEE;overflow-x:hidden;">
    <img src="images/1.png" id="shan-img" style="display:none;" />
    <img src="images/2.png" id="sorry-img" style="display:none;" />
    <img src="images/ZI.png" style="width: 100%;"/>
	<div class="banner">
		<div class="turnplate" style="background-image:url(images/turnplate-bg.png);background-size:100% 100%;">
			<canvas class="item" id="wheelcanvas" width="422px" height="422px"></canvas>
			<img class="pointer" src="images/turnplate-pointer.png"/>
		</div>
    </div>
    <center><img src="images/yishu.png"/></center>
    <center>
    <ul style="color:#939393;text-align: left;width: 70%;font-size: 15px;">
        <li>抽奖时间：11月14号-18号</li>
        <li>兑奖方式：凭中奖信息到活动现场领奖</li>
        <li>每个用户仅限一次抽奖</li>
        <li>奖品数量有限，送完即止</li>
        <li>活动最终解释权归中科华洋所有</li>

    </ul>
	</center>
	<div id = "myprize" style="display:none;">
		<center><img src="images/myprize.png"/></center>
		<center>
		<ul style="color:#939393;text-align: left;width: 70%;font-size: 15px;">

		</ul>
		</center>
	</div>
    <div class="carry" style="background: url(images/XINF.png) no-repeat;background-size: 100%;width: 100%;height: 25rem;position: fixed;top: 15%;display: none;">
       <center> <button class="btn" onclick="exchagePrize()" style="width:135px;height:35px;margin-top: 85%;outline: none;border-radius: 5px;box-shadow:0px 0px 5px 5px #ddd; color:#E34043;background: #fff;">确认领奖</button></center>
    </div>
    <div style="display:''">
		<input id="prizeRecordId" name="prizeRecordId" value="" hidden>
	</div>
	<div style="display:none">
	<script type="text/javascript">
	var _bdhmProtocol = (("https:" == document.location.protocol) ? " https://" : " http://");
	document.write(unescape("%3Cscript src='" + _bdhmProtocol + "hm.baidu.com/h.js%3F6f798e51a1cd93937ee8293eece39b1a' type='text/javascript'%3E%3C/script%3E"));
	$(".btn").click(function(){
		//console.log(123);
		$(this).html("已领奖")
	})
	</script>
	<script type="text/javascript">var cnzz_protocol = (("https:" == document.location.protocol) ? " https://" : " http://");document.write(unescape("%3Cspan id='cnzz_stat_icon_5718743'%3E%3C/span%3E%3Cscript src='" + cnzz_protocol + "s9.cnzz.com/stat.php%3Fid%3D5718743%26show%3Dpic2' type='text/javascript'%3E%3C/script%3E"));</script>
	</div>
</body>
</html>