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HomeWeb Front-endJS TutorialExample sharing of adding clear function to Jquery EasyUI component

本文主要为大家带来一篇为Jquery EasyUI 组件加上清除功能的方法(详解)。小编觉得挺不错的,现在就分享给大家,也给大家做个参考。一起跟随小编过来看看吧,希望能帮助到大家。

1、背景

在使用 EasyUI 各表单组件时,尤其是使用 ComboBox(下拉列表框)、DateBox(日期输入框)、DateTimeBox(日期时间输入框)这三个组件时,经常有这样的需求,下拉框或日期只允许选择、不允许手动输入,这时只要在组件选项中加入 editable:false 就可以实现,但有一个问题,就是:一旦选择了,没办法清空。经过研究,可以用一个变通的解决方案:给组件加上一个“清除”按钮,当有值是,显示按钮,点击按钮可清空值,当无值是,隐藏按钮。

2、函数定义

定义JS方法,为 EasyUI 中一些常用组件添加'清除'按钮及功能。共计6个:

/*
 * 为‘文本框'列表添加‘清除'图标
 * 该实现使用了 onChange 事件,如果用户需要该事件,可传入自定义函数,会自动回调 。
 */
function addClear4TextBox(theId,onChangeFun)
{
 var theObj = $(theId);
 
 //根据当前值,确定是否显示清除图标
 var showIcon = function(){  
  var icon = theObj.textbox('getIcon',0);
  if (theObj.textbox('getValue')){
   icon.css('visibility','visible');
  } else {
   icon.css('visibility','hidden');
  }
 };
 
 theObj.textbox({
  //添加清除图标
  icons:[{
   iconCls:'icon-clear',
   handler: function(e){
    theObj.textbox('clear');
   }
  }],
  
  //值改变时,根据值,确定是否显示清除图标
  onChange:function(){
   if(onChangeFun)
   {
    onChangeFun();
   }
   showIcon();
  }
  
 }); 
 
 //根据目前值,确定是否显示清除图标
 showIcon();
}

/*
 * 为‘下拉列表框'添加‘清除'图标
 * 该实现使用了 onChange 事件,如果用户需要该事件,可传入自定义函数,会自动回调 。
 */
function addClear4Combobox(theId,onChangeFun)
{
 var theObj = $(theId);
 
 //根据当前值,确定是否显示清除图标
 var showIcon = function(){  
  var icon = theObj.combobox('getIcon',0);
  if (theObj.combobox('getValue')){
   icon.css('visibility','visible');
  } else {
   icon.css('visibility','hidden');
  }
 };
 
 theObj.combobox({
  //添加清除图标
  icons:[{
   iconCls:'icon-clear',
   handler: function(e){
    theObj.combobox('clear');
   }
  }],
  
  //值改变时,根据值,确定是否显示清除图标
  onChange:function(){
   if(onChangeFun)
   {
    onChangeFun();
   }
   showIcon();
  }
  
 }); 
 
 //初始化确认图标显示
 showIcon();
}


/*
 * 为‘数据表格下拉框'添加‘清除'图标
 * 该实现使用了 onChange 事件,如果用户需要该事件,可传入自定义函数,会自动回调 。
 */
function addClear4Combogrid(theId,onChangeFun)
{
 var theObj = $(theId);
 
 //根据当前值,确定是否显示清除图标
 var showIcon = function(){  
  var icon = theObj.combogrid('getIcon',0);
  if (theObj.combogrid('getValue')){
   icon.css('visibility','visible');
  } else {
   icon.css('visibility','hidden');
  }
 };
 
 theObj.combogrid({
  //添加清除图标
  icons:[{
   iconCls:'icon-clear',
   handler: function(e){
    theObj.combogrid('clear');
   }
  }],
  
  //值改变时,根据值,确定是否显示清除图标
  onChange:function(){
   if(onChangeFun)
   {
    onChangeFun();
   }
   showIcon();
  }
  
 }); 
 
 //初始化确认图标显示
 showIcon();
}

/*
 * 为‘数值输入框'添加‘清除'图标
 * 该实现使用了 onChange 事件,如果用户需要该事件,可传入自定义函数,会自动回调 。
 */
function addClear4Numberbox(theId,onChangeFun)
{
 var theObj = $(theId);
 
 //根据当前值,确定是否显示清除图标
 var showIcon = function(){  
  var icon = theObj.numberbox('getIcon',0);
  if (theObj.numberbox('getValue')){
   icon.css('visibility','visible');
  } else {
   icon.css('visibility','hidden');
  }
 };
 
 theObj.numberbox({
  //添加清除图标
  icons:[{
   iconCls:'icon-clear',
   handler: function(e){
    theObj.numberbox('clear');
   }
  }],
  
  //值改变时,根据值,确定是否显示清除图标
  onChange:function(){
   if(onChangeFun)
   {
    onChangeFun();
   }
   showIcon();
  }
  
 }); 
 
 //初始化确认图标显示
 showIcon();
}

/*
 * 为‘日期选择框'添加‘清除'图标
 * 该实现使用了 onChange 事件,如果用户需要该事件,可传入自定义函数,会自动回调 。
 */
function addClear4Datebox(theId,onChangeFun)
{
 var theObj = $(theId);
 
 //根据当前值,确定是否显示清除图标
 var showIcon = function(){  
  var icon = theObj.datebox('getIcon',0);
  if (theObj.datebox('getValue')){
   icon.css('visibility','visible');
  } else {
   icon.css('visibility','hidden');
  }
 };
 
 theObj.datebox({
  //添加清除图标
  icons:[{
   iconCls:'icon-clear',
   handler: function(e){
    theObj.datebox('clear');
   }
  }],
  
  //值改变时,根据值,确定是否显示清除图标
  onChange:function(){
   if(onChangeFun)
   {
    onChangeFun();
   }
   showIcon();
  }
  
 }); 
 
 //初始化确认图标显示
 showIcon();
}


/*
 * 为‘日期时间选择框'添加‘清除'图标
 * 该实现使用了 onChange 事件,如果用户需要该事件,可传入自定义函数,会自动回调 。
 */
function addClear4Datetimebox(theId,onChangeFun)
{
 var theObj = $(theId);
 
 //根据当前值,确定是否显示清除图标
 var showIcon = function(){  
  var icon = theObj.datetimebox('getIcon',0);
  if (theObj.datetimebox('getValue')){
   icon.css('visibility','visible');
  } else {
   icon.css('visibility','hidden');
  }
 };
 
 theObj.datetimebox({
  //添加清除图标
  icons:[{
   iconCls:'icon-clear',
   handler: function(e){
    theObj.datetimebox('clear');
   }
  }],
  
  //值改变时,根据值,确定是否显示清除图标
  onChange:function(){
   if(onChangeFun)
   {
    onChangeFun();
   }
   showIcon();
  }
  
 }); 
 
 //初始化确认图标显示
 showIcon();
}

3、使用

用法格式如下:

(1)addClear4TextBox("#name",nameChangeDo); //文本框,同时传入了回调函数
(2)addClear4Combobox("#state\\.id"); //下拉列表框
(3)addClear4Combogrid("#type\\.id"); //数据表格下拉框
(4)addClear4Numberbox("#intNum2"); //数值输入框
(5)addClear4Datebox("#theDate2"); //日期选择框
(6)addClear4Datetimebox("#theTime2"); //日期选择框

注:函数的实现使用了 onChange 事件,如果需要使用该事件执行某些操作,可传入自定义函数,会自动回调 ,参见(1)。

<script>

//名称改变时执行的一些操作。(演示清除操作回调)
var nameChangeDo = function(){
 //alert("改变了...");
}

$(function(){ 
 addClear4TextBox("#code");
 addClear4TextBox("#name",nameChangeDo);
 addClear4Combobox("#city");
 addClear4Combobox("#state\\.id");
 addClear4Combogrid("#type\\.id");
 addClear4Combobox("#hobby");
 addClear4Numberbox("#intNum2");
 addClear4Numberbox("#doubleNum1");
 addClear4Numberbox("#doubleNum2");
 addClear4Datebox("#theDate2");
 addClear4Datetimebox("#theTime2");
 addClear4TextBox("#remark"); 
});

</script>

4、效果展示

(1)有值时的情况(其中 类型 是数据列表下拉框)

(2)无值时的情况

相关推荐:

Jquery下EasyUI组件中的DataGrid结果集清空方法_jquery

jQuery easyui 中使用datetimebox 取两个日期间相隔天数的方法

jquery easyui如何实现格式化列详解

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