yui - 带选择列表的 YUI Datatable 客户端过滤器？

Question

我可以使用多个下拉菜单和分页的 YUI 数据表来过滤静态数据集的行吗？

http://www.mappingbahia.org/project/iguape_dataset.html

Answer 1

每个 YAHOO.widget 组件，例如 YUI DataTable使用 YUI DataSource组件，它提供填充每个呈现的 YAHOO.widget 组件所需的数据。下面你可以看到它是如何工作的

注意每个 YAHOO.widget 组件内部通过 sendRequest 调用底层 YUI 数据源方法(参见步骤 1)。现在让我们看看 sendRequest 签名

sendRequest(request, callback)

• 请求

For remote data, this request may be a param/value string, such as "id=123&name=foo". For local data, this request maybe a simpler value such as 123. Specifying parameters may be irrelevent, so this value may be simply be null

• 回调

它只是一个 JavaScript 对象，可以如下描述(注意每个属性)

var callback = {
    success:function(request, response, payload) {
        /*
         * successful request is performed by success property
         */
    },
    failure:function(request, response, payload) {
        /*
         * failure request is performed by failure property
         */
    },
    scope:null,
    argument:null
}

因此，当每个 YAHOO.widget 组件通过 sendRequest 方法调用内部 YUI 数据源时，它会传递一个如上所示的内置回调对象，该对象负责渲染 YAHOO.widget 组件本身。因此，如果您想要自定义行为，您需要调用底层 YUI 数据源并传递您的自定义回调对象来过滤 YUI 数据源提供的数据，如下所示

var datatable = // YUI datatable settings goes here

要将每个更改事件附加到每个选择，您可以使用

YAHOO.util.Event.addListener("sex", "change", function(e) {
    var value = e.getTarget(e).value;

    if(YAHOO.lang.isValue(value)) {
        /**
          * Notice i am retrieving The underlying datasource To make a call To sendRequest method
          */
        datatable.getDataSource().sendRequest(null, {
            success:function(request, response, payload) {
                /**
                  * because scope property (see bellow) refers To The datatable
                  * this keyword can be used To get a reference To The datatable
                  */

                /**
                  * initializeTable method clear any data stored by The datatable
                  */
                this.initializeTable();

                var rs = response.results;
                var filtered = [];
                for(var i = 0; i < rs.length; i++) {
                    /**
                      * Is The sex property equal To The value selected by The user ?
                      */ 
                    if(rs[i]["sex"] == value) {
                        filtered[filtered.length] = rs[i];
                    }
                }

                this.getRecordSet().setRecords(filtered, 0);

                // Update UI
                this.render();
            },
            scope:datatable,
            argument:null
        });
    }
});

虽然未经测试，但我很确定它会正常工作。