js前端日历控件（悬浮、拖拽、自由变形）

<link href="../../Content/themes/base/jquery-ui.css" rel="stylesheet" />
<link href="../../Content/datePrinter.css" rel="stylesheet" />

<script src="/UploadFiles/2021-04-02/jquery-ui-1.8.20.min.js">

控件中的核心部分就是打印选中月的日历，是参考网上的代码，偷懒嘛，欢迎认领
例如页面代码如下：
<input type="text" id="datepickerInput"/>
调用的写法：


var dpCon = $("#datepickerInput").datePrinter({
   initDate: "2017-4-5", //初始化日期
   language: "EN", //语言
   resizable: true, //可自由变形
   draggable: true, //可悬浮拖拽
   showYearAndMonth: true, //是否显示年月下拉框
   getColor: getColor, //自定义颜色接口
   chooseDone: chooseDone //选中日历某日执行事件接口
  });

  //选中日期时让日历消失 当然此处可以执行比较复杂的业务，如服务器数据请求
  function chooseDone(date) {
   dpCon.datePrinter("dpHide");
  }

  //自定义日期颜色
  function getColor(day){
   if(day == 3 || day==7 || day==15)
    return "dpdisabled";
   else if(day== 5 || day==18 || day==23)
    return "dpyellow";
   else
    return "dpenable";
  }

  //获取当前选中的日期 调用控件提供的API getSelectDate
  dpCon.datePrinter("getSelectDate");



这样子就给上面的input text控件注册了一个日历控件，在点击input时，日历就会浮出，效果如下

你可能注意到右下角的小三角了，鼠标放上去之后可以随意变化日历的长宽，另外在日历上按住鼠标左键可以随意移动日期控件的位置，不挤占页面位置

 下面这段是打印日历的代码，供参考：


//默认获取当前日期
  var today = option.initDate " dateTD";

    (day <= 0 || day > days_per_month[m]) "dpBlank") : (day = idx - dayOfWeek + 2);
    day == d "' + styleName + ' today">' + day + '</td>' :
    //高亮显示当天
    tr += '<td class="' + styleName + '">' + day + '</td>';
   }
   tr += '</tr>';
   self._dpTable.append(tr);
   tr = "";
  }



以前都是写后台，玩前端的时间不长，有不对的地方欢迎指正
datePrinter.js的全部代码如下：


var _datePrinter_tmpl_CN = "<tr><th>一</th><th>二</th><th>三</th><th>四</th><th>五</th><th>六</th><th>日</th></tr>";
var _datePrinter_tmpl_EN = "<tr><th>Mon</th><th>Tue</th><th>Wed</th><th>Thu</th><th>Fri</th><th>Sat</th><th>Sun</th></tr>";

Date.prototype.Format = function (fmt) { //author: meizz 
 var o = {
 "M+": this.getMonth() + 1,   //月份 
 "d+": this.getDate(),   //日 
 "h+": this.getHours(),   //小时 
 "m+": this.getMinutes(),   //分 
 "s+": this.getSeconds(),   //秒 
 "q+": Math.floor((this.getMonth() + 3) / 3), //季度 
 "S": this.getMilliseconds()  //毫秒 
 };
 if (/(y+)/.test(fmt))
 fmt = fmt.replace(RegExp.$1, (this.getFullYear() + "").substr(4 - RegExp.$1.length));
 for (var k in o)
 if (new RegExp("(" + k + ")").test(fmt))
  fmt = fmt.replace(RegExp.$1, (RegExp.$1.length == 1) "00" + o[k]).substr(("" + o[k]).length)));
 return fmt;
}

$.widget("ui.datePrinter", {
 options: {
 initDate: null,
 language: null, // CN,EN
 resizable: false,
 draggable: false,
 width: "240px",
 dateFormat:'yyyy/MM/dd',
 getColor: null, //自定义颜色
 showYearAndMonth: false,
 chooseDone: function (selectDate) { return selectDate }, //选中日期后执行的自定义事件
 autoId:null //控件Id
 },
 _dpTable: null,
 _dpRoot:null,
 _selectDate:null, //选中日期
 _create: function () {
 var self = this, option = this.options, ele = this.element;
 $(ele).after("<div class='dpRoot'></div>");
 self._dpRoot = $(ele).parent().find('div.dpRoot');
 self._dpRoot.empty();

 self._dpRoot.append("<div class='dpTitle' style='text-align:right;background-color:#e8edf4; width:" + option.width +
  "'><select class='selYear'></select><select class='selMonth'></select><a style='color:#000;text-decoration:none;font-size:18px;padding-left:10px; padding-right:10px;width:10px;' href='javascript:void(0);'>x</a></div>");
 self._dpRoot.append("<table style='width:" + option.width + "' cellspacing='0'></table>");
 option.autoId = self._newGuid();
 },
 _init: function () {
 var self = this, option = this.options, ele = this.element;
 if (option.initDate && typeof option.initDate == 'string')
  option.initDate = new Date(option.initDate.replace("-", "/"));

 //初始化日历
 self._initDate();

 //点击事件
 self._dpTable.delegate("td", "click", function () {
  if (!$(this).hasClass("dpBlank")) {
  self._dpTable.find("td").removeClass("today");
  $(this).addClass("today");
  //控件设置值
  $.proxy(self._setDate($(this).text()), self);

  if (option.chooseDone && typeof (option.chooseDone) == 'function')
   $.proxy(option.chooseDone(self._selectDate), self);
  }
 });

 if (option.resizable)
  self._dpRoot.resizable({
  minHeight: self._dpRoot.css("height").replace("px",''),
  minWidth:option.width.replace("px",''),
  resize: function (event, ui) {
   var titleHeight = self._dpRoot.find("div.dpTitle").css("height").replace("px", "");

   //最小值时不再缩小
   if (ui.size.width >= Number(option.width.replace("px",''))) {
   $(ui.element).find("table").css({ "width": ui.size.width, "height": ui.size.height - titleHeight, "text-align": "center" });
   $(ui.element).find("div.dpTitle").css({ "width": ui.size.width });
   }
  }
  });

 if(option.draggable)
  self._dpRoot.draggable();

 //关闭按钮事件
 self._dpRoot.find("div.dpTitle > a").bind("click", function () {
  $.proxy(self.dpHide(), self);
 });

 if (option.showYearAndMonth) {
  self._initSelYear();
  self._initSelMonth();
 }

 $(ele).focus(function () {
  self.dpShow();
 });

 $(ele).click(function () {
  self.dpShow();
 });

 //$(ele).blur(function (e) {
 // if ($(e.target).closest('div.dpRoot').length == 0) {
 // self.dpHide();
 // }
 //});
 },

 _destroy: function () {
 var self = this, option = this.options, ele = this.element;
 self._dpRoot.empty();
 this._prototype._destroy.call(self);
 },

 _getColor: function (date) {
 var styleName = null;
 if (date == 3 || date == 5 || date == 12)
  styleName = "dpdisabled";
 else if (date == 20 || date == 23 || date == 27)
  styleName = "dpyellow";
 else
  styleName = "dpenable";

 return styleName;
 },

 _initSelYear: function () {
 var self = this, option = this.options, ele = this.element;
 //根据初始化设置时间计算
 var today = option.initDate "selected='selected'" : "";
  self._dpRoot.find("select.selYear").show().append("<option value='" + (y + i - 10) + "' " + varSel + ">" + (y + i - 10) + "</option");
 }

 //年事件
 self._dpRoot.find("select.selYear").bind("change", function () {
  option.initDate = new Date(option.initDate.setYear($(this).val()));
  self._initDate();
 });
 },

 _initSelMonth: function () {
 var self = this, option = this.options, ele = this.element;
 //根据初始化设置时间计算
 var today = option.initDate "selected='selected'" : "";
  self._dpRoot.find("select.selMonth").show().append("<option value='" + (i + 1) + "' " + varSel + ">" + (i + 1) + "</option");
 }

 //月事件
 self._dpRoot.find("select.selMonth").bind("change", function () {
  var selMon = Number($(this).val()) - 1;
  option.initDate = new Date(option.initDate.setMonth(selMon));
  self._initDate();
 });
 },

 _initDate: function () {
 var self = this, option = this.options, ele = this.element;

 self._dpTable = self._dpRoot.find("table");
 self._dpTable.empty();
 if (option.language == "EN") {
  self._dpTable.wrapInner(_datePrinter_tmpl_EN);
 }

 //默认获取当前日期
 var today = option.initDate " dateTD";

  (day <= 0 || day > days_per_month[m]) "dpBlank") : (day = idx - dayOfWeek + 2);
  day == d "' + styleName + ' today">' + day + '</td>' :
  //高亮显示当天
  tr += '<td class="' + styleName + '">' + day + '</td>';
  }
  tr += '</tr>';
  self._dpTable.append(tr);
  tr = "";
 }
 },

 _isLeap: function (year) {
 var self = this, option = this.options, ele = this.element;
 return year % 4 == 0 "";
 for (var i = 1; i <= 32; i++) {
  var n = Math.floor(Math.random() * 16.0).toString(16);
  guid += n;
  if ((i == 8) || (i == 12) || (i == 16) || (i == 20)) {
  //guid += "-";
  }
 }
 return guid;
 }

});



样式本人是业余的，勉强看看吧，由于datePrinter.js有依赖css的class名称，贴出来datePrinter.css文件代码如下


.dpBlank {
 background-color: white;
 cursor: not-allowed;
}


.dpRoot {
 width: 240px;
 position:absolute;
 display:none;
}

.today {
 border: 2px double #FF9900 !important;
}

.dpenable {
 background-color: #AABBFF;
}

.dpyellow {
 background-color: #FFC266;
}

.dpdisabled {
 background-color: #B0AEA4;
}

.dpRoot table {
 font-size: 13px;
 width: inherit;
}

.dpRoot table th {
 font-size: 12px;
 border: solid 2px #e8eef4;
 padding: 2px 3px;
 background-color: #e8eef4;
 border-collapse:initial;
 text-align: center;
 width: 22px;
}

.dpRoot table td {
 color: white;
 padding: 4px 5px;
 border: solid 2px #e8eef4;
}

.dpTitle {
 padding: 3px 0 0 0;
}

.dateTD {
 cursor: pointer;
}

.selYear {
 margin-right: 5%;
 display: none;
 font-size:14px;
}

.selMonth {
 margin-right: 5%;
 display: none;
 font-size:14px;
}



以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。