easyui应用（四）--- easyui扩展
杜俊风
从easyui的demo中复制到下面的代码，可做扩展的参考：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>Client Side Pagination in DataGrid - jQuery EasyUI Demo</title>
<link rel="stylesheet" type="text/css" href="../../themes/default/easyui.css">
<link rel="stylesheet" type="text/css" href="../../themes/icon.css">
<link rel="stylesheet" type="text/css" href="../demo.css">
<script type="text/javascript" src="../../jquery.min.js"></script>
<script type="text/javascript" src="../../jquery.easyui.min.js"></script>
</head>
<body>
<h2>Client Side Pagination in DataGrid</h2>
<p>This sample shows how to implement client side pagination in DataGrid.</p>
<div style="margin:20px 0;"></div>
<table id="dg" title="Client Side Pagination" style="width:700px;height:300px" data-options="
rownumbers:true,
singleSelect:true,
autoRowHeight:false,
pagination:true,
pageSize:10">
<thead>
<tr>
<th field="inv" width="80">Inv No</th>
<th field="date" width="100">Date</th>
<th field="name" width="80">Name</th>
<th field="amount" width="80" align="right">Amount</th>
<th field="price" width="80" align="right">Price</th>
<th field="cost" width="100" align="right">Cost</th>
<th field="note" width="110">Note</th>
</tr>
</thead>
</table>
<script>
(function($){
function pagerFilter(data){
if ($.isArray(data)){ // is array
data = {
total: data.length,
rows: data
}
}
var target = this;
var dg = $(target);
var state = dg.data('datagrid');
var opts = dg.datagrid('options');
if (!state.allRows){
state.allRows = (data.rows);
}
if (!opts.remoteSort && opts.sortName){
var names = opts.sortName.split(',');
var orders = opts.sortOrder.split(',');
state.allRows.sort(function(r1,r2){
var r = 0;
for(var i=0; i<names.length; i++){
var sn = names[i];
var so = orders[i];
var col = $(target).datagrid('getColumnOption', sn);
var sortFunc = col.sorter || function(a,b){
return a==b ? 0 : (a>b?1:-1);
};
r = sortFunc(r1[sn], r2[sn]) * (so=='asc'?1:-1);
if (r != 0){
return r;
}
}
return r;
});
}
var start = (opts.pageNumber-1)*parseInt(opts.pageSize);
var end = start + parseInt(opts.pageSize);
data.rows = state.allRows.slice(start, end);
return data;
}
var loadDataMethod = $.fn.datagrid.methods.loadData;
var deleteRowMethod = $.fn.datagrid.methods.deleteRow;
$.extend($.fn.datagrid.methods, {
clientPaging: function(jq){
return jq.each(function(){
var dg = $(this);
var state = dg.data('datagrid');
var opts = state.options;
opts.loadFilter = pagerFilter;
var onBeforeLoad = opts.onBeforeLoad;
opts.onBeforeLoad = function(param){
state.allRows = null;
return onBeforeLoad.call(this, param);
}
var pager = dg.datagrid('getPager');
pager.pagination({
onSelectPage:function(pageNum, pageSize){
opts.pageNumber = pageNum;
opts.pageSize = pageSize;
pager.pagination('refresh',{
pageNumber:pageNum,
pageSize:pageSize
});
dg.datagrid('loadData',state.allRows);
}
});
$(this).datagrid('loadData', state.data);
if (opts.url){
$(this).datagrid('reload');
}
});
},
loadData: function(jq, data){
jq.each(function(){
$(this).data('datagrid').allRows = null;
});
return loadDataMethod.call($.fn.datagrid.methods, jq, data);
},
deleteRow: function(jq, index){
return jq.each(function(){
var row = $(this).datagrid('getRows')[index];
deleteRowMethod.call($.fn.datagrid.methods, $(this), index);
var state = $(this).data('datagrid');
if (state.options.loadFilter == pagerFilter){
for(var i=0; i<state.allRows.length; i++){
if (state.allRows[i] == row){
state.allRows.splice(i,1);
break;
}
}
$(this).datagrid('loadData', state.allRows);
}
});
},
getAllRows: function(jq){
return jq.data('datagrid').allRows;
}
})
})(jQuery);
function getData(){
var rows = [];
for(var i=1; i<=800; i++){
var amount = Math.floor(Math.random()*1000);
var price = Math.floor(Math.random()*1000);
rows.push({
inv: 'Inv No '+i,
date: $.fn.datebox.defaults.formatter(new Date()),
name: 'Name '+i,
amount: amount,
price: price,
cost: amount*price,
note: 'Note '+i
});
}
return rows;
}
$(function(){
$('#dg').datagrid({data:getData()}).datagrid('clientPaging');
});
</script>
</body>
</html>
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