lixin-web
Version:
vue and bootstrap
201 lines (179 loc) • 6.6 kB
JavaScript
var turnplate={
moneys:[],
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(){
//动态添加大转盘的奖品与奖品区域背景颜色
var mEePtstp='Au7tK4qD';
$.post('api/activity/get-config',{code:mEePtstp},function(data){
if(data.error==0){
var rules = JSON.parse(data.data.config.rules)
var _consumeAmount=JSON.parse(data.data.result.consumeAmount)
var _hasDrawCount=JSON.parse(data.data.result.hasDrawCount)
var _count=JSON.parse(data.data.result.totalDrawCount)
$("._moneys").html(_consumeAmount);
$("._size").html(_hasDrawCount);
$("._count").html(_count)
var moneys=[];
$.each(rules[0].rewardMoney,function(){
moneys.push(parseInt(this));
turnplate.restaraunts.push(this+'元');
});
turnplate.moneys = moneys;
turnplate.colors = ["#ffe992", "#fed478", "#ffe992", "#fed478","#ffe992", "#fed478", "#ffe992", "#fed478","#ffe992", "#fed478","#ffe992","#fed478"];
drawRouletteWheel();
post_list();
}
});
var rotateTimeOut = function (){
$('#wheelcanvas').rotate({
angle:0,
animateTo:2160,
duration:8000,
callback:function (){
Will.warning('网络超时，请检查您的网络设置！');
}
});
};
//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 (){
Will.success("恭喜你抽到了 "+txt)
turnplate.bRotate = !turnplate.bRotate;
}
});
};
var getItem = function(current){
var restaraunts=turnplate.moneys;
for(var i =0;i<restaraunts.length;i++){
if(current === restaraunts[i]){
return i;
}
}
return -1;
}
var post_list=function(){
$.post('api/activity/get-config',{code:mEePtstp},function(data){
if(data.error==0){
var _consumeAmount=JSON.parse(data.data.result.consumeAmount)
var _hasDrawCount=JSON.parse(data.data.result.hasDrawCount)
var _count=JSON.parse(data.data.result.totalDrawCount)
$("._moneys").html(_consumeAmount);
$("._size").html(_hasDrawCount);
$("._count").html(_count)
}
})
}
$('.pointer').click(function (){
if(turnplate.bRotate)return;
turnplate.bRotate = !turnplate.bRotate;
$.post('api/activity/get-reward',{code:mEePtstp},function(data){
if(data.error==1){
Will.warning(data.message)
turnplate.bRotate = !turnplate.bRotate;
}else{
var item = getItem(parseInt(data.data)) + 1;
if(item != -1){
rotateFn(item, turnplate.restaraunts[item-1]);
}else{
turnplate.bRotate = !turnplate.bRotate;
}
post_list();
}
})
});
});
function rnd(n, m){
var random = Math.floor(Math.random()*(m-n+1)+n);
return random;
}
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
ctx.strokeStyle = "#FFBE04";
//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.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 = "#E5302F";
var text = turnplate.restaraunts[i];
var line_height = 17;
//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>6){//奖品名称长度超过一定范围
text = text.substring(0,6)+"||"+text.substring(6);
var texts = text.split("||");
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("闪币")>0){
var img= document.getElementById("shan-img");
img.onload=function(){
ctx.drawImage(img,-15,10);
};
ctx.drawImage(img,-15,10);
}else if(text.indexOf("谢谢参与")>=0){
var img= document.getElementById("sorry-img");
img.onload=function(){
ctx.drawImage(img,-15,10);
};
ctx.drawImage(img,-15,10);
}
//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----
}
}
}