jquery.linkage_select.js
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/**
* 多级联动插件
* @author ln
*
*
# 示例html
<div class="region_select"></div>
# 示例css
.region_select{height:38px;}
.region_select select{padding:8px 0;line-height:30px;min-width:140px;margin-right:20px;}
.region_select .invalid{border:1px solid #f60;}
# 示例javascript
<script type="text/javascript">
$(".region_select").LinkageSelect({
// 数据源
dataUrl:"http://manweb.nong12.com/city/getCountryJsonpList.do",
// 字段映射
map: {
id:"regionId",
name:"regionName",
pid:"parentId",
},
// 分类起始
pid:"-10",
// 默认值
selected:["111","1110101"],
// form表单名称
inputName:"region",
// 提示标签
default_labels: {
0: "请选择",
1: "请选择",
2: "请选择",
3: "请选择",
4: "请选择"
}
});
</script>
*/
;(function($) {
/**
* 获取数据资源，返回数据统一使用 {key:value}
* @type {Object}
*/
var dataSource = {
common: function(pid, records_ids, select_index, cb) {
var default_labels = this.opt.default_labels;
var idField = this.idField;
var nameField = this.nameField;
var pidField = this.pidField;
$.ajax({
url: this.opt.dataUrl + "?" + pidField + "=" + pid,
dataType: "jsonp",
success: function(data) {
var hash = [];
if (!data.length) {
return;
}
if (default_labels[select_index]) {
hash.push({
id: "",
name: default_labels[select_index]
});
}
$.each(data, function(index, one) {
hash.push({
id: one[idField],
name: one[nameField]
});
});
return cb(hash);
},
error: function(e) {}
});
}
};
function LinkageSelect($container, options) {
this.$container = $container;
// 可选项
this.opt = {
level: 9999,
// 数据url
dataUrl: "",
dataSource: "common",
// 拓展数据源 参考 dataSource 对象写法
dataSourceFn: {},
// 数据源字段映射, 例如 {id:"regionId"}
map: {
},
// 父级ID
pid: 0,
inputName: "region_select" + Math.round(Math.random() * 100),
// 默认选中
selected: [],
// 默认标签
default_labels: {
0: "请选择",
1: "请选择",
2: "请选择",
3: "请选择",
4: "请选择"
}
};
if (typeof dataSource[this.opt.dataSource] === "undefined") {
return;
}
$.extend(this.opt, options);
// 拓展数据源
$.extend(dataSource, this.opt.dataSourceFn);
// 字段映射
this.idField = this.opt.map['id'] || "id";
this.nameField = this.opt.map['name'] || "name";
this.pidField = this.opt.map['pid'] || "pid";
this.Init();
}
LinkageSelect.prototype = {
isInit: false,
Init: function() {
var that = this;
this.$container.css('opacity', 0);
setTimeout(function() {
that.$container.animate({
opacity: 1
});
}, 500);
this.renderSelect(this.opt.pid, 0);
this.bindEvent();
},
// 绑定事件
// 如果一个select change 需要移除后面的select 然后重建后后面的select
bindEvent: function() {
var that = this;
this.$container.on('change', 'select', function(event) {
event.preventDefault();
var has_next = $(this).next();
var index = $(this).index();
var value = $(this).val();
$(this).removeClass('invalid');
if (!value || !has_next || (index + 1) >= that.opt.level) {
that.$container.children(':gt(' + index + ')').remove();
return;
}
that.renderSelect(value, index + 1);
});
},
renderSelect: function(pid, index) {
var that = this;
dataSource[this.opt.dataSource].call(this, pid, this.records_ids, index, $.proxy(function(data) {
if (typeof index !== "undefined") {
var current_index = !index ? 0 : index - 1;
this.$container.children(':gt(' + current_index + ')').remove();
}
if (data.length < 1) {
return;
}
var $select = $('<select name="' + that.opt.inputName + '[' + index + ']" pid="' + pid + '" index="' + index + '">');
var options = [];
$.each(data, function(key, value) {
if (value.id == that.opt.selected[index]) {
options.push('<option selected value="' + value.id + '">' + value.name + '</option>');
} else {
options.push('<option value="' + value.id + '">' + value.name + '</option>');
}
});
$select.html(options.join(""));
this.$container.append($select);
$select.trigger('change');
this.$container.trigger('renderSelectEnd');
}, this));
}
};
if (window.jQuery || window.Zepto) {
(function($) {
'use strict';
$.fn.LinkageSelect = function(params) {
var firstInstance;
this.each(function(i) {
var that = $(this);
if (!that.data('LinkageSelect')) {
var s = new LinkageSelect(that, params);
if (!i) firstInstance = s;
that.data('LinkageSelect', s);
}
});
return firstInstance;
};
})(window.jQuery || window.Zepto);
}
if (typeof define === 'function' && define.amd) {
define([], function() {
'use strict';
return LinkageSelect;
});
}
})(jQuery);