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自己写的JqueryDropTree下拉选择树插件

闲话少聊,今天本人重点看了看jquery插件开发这一块。想通过代码,实际练下兵。当然,也是为了解决项目的实际需要。平时,我们经常遭遇"选择框"这个控件。 平时,如果我们的选择项非常简单, 一般用浏览器自带的select 就OK了。但是如果字典项直接存在上下级关系,也就是经常见到的树结构 ,那就非常非常难受了。自己很纳闷,为什么jquery插件千千万,为什么就没有这么一款插件呢,一般就是纯粹的树插件, 要不就是下拉框插件。总之,个人没有找到满足自己要求的插件。那就自己就着手写一个吧。
先亮底牌,展示效果。
 
 
自己写的Jquery DropTree下拉选择树插件
主要有两种效果:
第一种:对于数据一般情况, 用浏览器的select 标签也可,主要是可以解决自身select标签的样式.重点是在美化,使用一些标签进行仿真 select标签;
第二种:也就是重点, 下拉选择树。 下拉列表中显示树结构
 
实现方式
   其实这个插件,自己只负责组装。意思就是:这两种效果自己都参照了其他jquery插件,个人只是把两者合并了一下。
因为个人对美工这一块的干活,一直都是远观的状态。
使用的两个插件分别是:
ztree.3.5
jquery.mfs

实现代码(droptree.js)
 
/**
下拉树
*/

(function($){
  var defaults={    
    idLabel:"code",
    textLabel:"name",
    pidLabel:"pid",    
    transition:"ztree",
    items:[]
  };
/**
  target:input element;
    
*/

function DropTree(target,options){    
    this.target = target;
    this.value = target.value;
                this.$target = $(target);
    this.opts = $.extend({}, defaults, options, this.$target.data());
    this.id = this.target.id || this.target.name;    
    if(this.$target.length >0){
        this._init();
    }
    return this;
}

DropTree.prototype._init = function(){
    var self = this;    
    this.$target.hide();
    this.$wrap = this.$target.wrap('
class="mfs-container">').parent();    
    this.$selected = $('class="mfs-selected-option" href="#" />').prependTo(this.$wrap);
    
    //this.$selected.css("height",15);
    this.$selected.html(this.value+" ");
    this.$down = $(" ").prependTo(this.$selected);    
    this.transition = Transitions[this.opts.transition].call(this);
    
};


var Transitions = {
  mfs:function(){    
    var mfsId = this.id+"_mfs";
    this.$options = $('
    class="mfs-options" id="'+mfsId+'"/>').insertAfter(this.$selected);
        var idLabel = this.opts.idLabel;
        var textLabel = this.opts.textLabel;
        var $options = this.$options;    
        //var (this.id);
        $.each(this.opts.items,function(i,n){
            var $op = $('
    "#" index="'+i+'">'+n[textLabel]+'').wrap('
  • class="mfs-option">').parent();        
            $options.prepend($op);
        });    
            
        //添加活力
        var enableMagic = function (theContainer){
            
            //TODO 可配置
            var selectElm = theContainer.find('select');
            var selectElmOptions = selectElm.find('option');
            var optionList = theContainer.find('#'+mfsId);
            var optionListLi = optionList.find('li.mfs-option');
            var selectedOption = theContainer.find('a.mfs-selected-option');
            var optionListOptions = optionList.find('a');
            
            optionList.hide();
            optionListOptions.click(function(){                    
              optionListLi.removeClass('active').removeClass('selected');
              $(this).closest('li').addClass('selected');
              selectedOption.html($(this).text()+' ');
              selectElmOptions.removeAttr('selected');
              selectElmOptions.eq($(this).attr('index')).prop('selected', 'selected');
              optionList.hide();
                
              // Make a refresh function that just updates the select magic (destroy and re-enable)
              if (selectElm.selectedIndex != $(this).attr('index') && selectElm.onchange) {    
                selectElm.selectedIndex = $(this).attr('index');
                selectElm.onchange();    
              }
              if (selectElm.selectedIndex != $(this).attr('index')) {
                selectElm.selectedIndex = $(this).attr('index');
                selectElm.trigger('change');
              }
            
              return false;
            });
        
            selectedOption.click(function(){
                        
              var optionListAll = $('#'+mfsId);
              if (optionList.is(':visible')) {
                optionList.hide();
                mfsSelectOpen = true;
              }
              else {
                optionListLi.removeClass('active');
                optionListAll.hide();
                optionList.show();
                var optionListSelected = optionList.find('li.mfs-option.selected');
                if (optionListSelected.length > 0) {
                  optionListSelected.addClass('active');
                }
                else {
                  optionList.find('li.mfs-option:first-child').addClass('active');
                }
                mfsSelectOpen = optionList;
              }
              $(this).blur();
              return false;
            });
        
            optionListLi.mouseover(function(){
              optionListLi.removeClass('active');
              $(this).addClass('active');
            });
        }; //end enableMagic    
        
        enableMagic(this.$wrap);
      },
        
      ztree:function(){
        var treeId = this.id+"_tree";
            //

          this.$options = $('
        "'+treeId+'" class="mfs-options ztree">').insertAfter(this.$selected);        
            var theContainer = this.$wrap;
            var optionList = theContainer.find('#'+treeId);
            var selectedOption = theContainer.find('a.mfs-selected-option');
            var srcElem = this.target;
            var idLabel = this.opts.idLabel;    
            var    zTreeOnClick= function(event, treeId, treeNode) {            
              selectedOption.html(treeNode.name+' ');//span 为下拉箭头占位符
              srcElem.value=treeNode[idLabel];
              optionList.hide();
            };
            
            var setting = {
              data: {
                simpleData: {
                  enable: true,
                  idKey: this.opts.idLabel,
                  pIdKey: this.opts.pidLabel
                }
              },
              callback: {
                onClick: zTreeOnClick        
              }        
            };
            
            this.oper = $.fn.zTree.init($("#"+treeId), setting,this.opts.items);    
            //设置默认值
            var nodes = this.oper.getNodesByParam(idLabel, this.value, null);
            if(nodes.length>0){
              var nodeName = (nodes[0])[this.opts.textLabel];    
              selectedOption.html(nodeName+' ');//span 为下拉箭头占位符
              this.oper.selectNode(nodes[0],true);
            }
            var enableMagic = function (theContainer){        
                var selectedOption = theContainer.find('a.mfs-selected-option');        
                optionList.hide();
                selectedOption.click(function(){                                
                  if (optionList.is(':visible')) {
                    optionList.hide();            
                  }
                  else {
                    optionList.show();
                  }
                  $(this).blur();
                  return false;
                });        
            }//end enableMagic
            enableMagic(this.$wrap);
          }
            
        };

        $.fn.droptree = function(options){
          return    this.each(function(){
                 if(!$.data(this,'droptree')){
                    $.data(this,'droptree',new DropTree(this,options));
                 }                
              });
        };
            
        })(jQuery)
     
    整合点在:Transitions 对象。明眼人一眼就看出来了:该对象提供两个方法:
    mfs: 主要参照mfs 插件,构建下拉列表的内容
    ztree: 借助ztree 构建 下拉列表树
    当然, 没用过ztree的盆友,也可以用其他的tree 插件。当然,那要自己在Transitions 添加了。 总之,跳跳大路通罗马

     
    html 使用
     
    <!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" />
    <title>无标题文档title>
    <script type="text/javascript" src="jquery-1.9.1.min.js">script>
    <script type="text/javascript" src="jquery.ztree.all-3.5.js">script>
    <script type="text/javascript" src="droptree.js">script>
    <link href="droptree_style.css" rel="stylesheet" />
    <link href="zTreeStyle/zTreeStyle.css" rel="stylesheet" />
    head>
    <script type="text/javascript">
    $(document).ready(function(){
        $("#simple-select").droptree({
      transition:'mfs',
      items:[{code:'man',name:'男人'},
             {code:'woman',name:'女人'},
             {code:'yao',name:'人妖'}
            ]}        
            );

        
        $("#simple_input").droptree({items:[
        {code:'root',name:'根节点',pid:-1},
        {code:'man',name:'男装',pid:'root'},
        {code:'woman',name:'女装',pid:'root'},
        {code:'man1',name:'男装1',pid:'man'},
        {code:'man2',name:'男装2',pid:'man'},
        {code:'woman1',name:'女装1',pid:'woman'}
        ],
        transition:"ztree"
        });
    });
        
    script>
    head>
    <body>

      <div class="wrap" style="width:600px; margin:0 auto; margin-top:200px">
        <div style="width:60px;float:left">    
          <select id="simple-select" name="simple-select">
                  <option value="opt1">option 1option>
                  <option value="opt2">option 2option>
                  <option value="opt3" selected="selected">option 3option>
          select>
        div>
        
        <div style="float:right">
            <input type="text" name="simple_input"    id="simple_input" value="man2"/>    
        div>
        
      div>
    body>
    html>
     
    还有一点要注意:适合使用该插件的组件,是form 元素:如input/select|  其他元素使用不合适。
    想一想,我们使用下拉选择树,就是获取选择值的,传到后台处理的。如果为radio、checkbox使用了。
     那就不是下拉系列了.呵呵。 如果为textarea, 也未尝不可,我只能用赵本山小品一句话,回答阁下:[我看你是,没事吃饱撑着的型]
    当然 需要完善的地方也有很多:
    如:
    1.ajax 支持
    2.多选支持
    =========================================================
    接下来, 应该可以进一步封装下,封装成jsp 标签。 剩下的就是时间问题了
     
     
     
     
     
     
     

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