有時咱們已經獲得充分的分層樹形網格的數據,咱們還想讓樹形網格按層次延遲加載節點。首先,只加載頂層節點;而後點擊節點的展開圖標來加載它的子節點。本教程展現如何建立帶有延遲加載特性的樹形網格。html
jQuery EasyUI最新試用版下載請猛戳>>node
點擊查看示例json
建立樹網格
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< table id = "test" title = "Folder Browser" class = "easyui-treegrid" style = "width:700px;height:300px" data-options=" url: 'data/treegrid_data.json', method: 'get', rownumbers: true, idField: 'id', treeField: 'name', loadFilter: myLoadFilter "> < thead > < tr > < th field = "name" width = "220" >Name</ th > < th field = "size" width = "100" align = "right" >Size</ th > < th field = "date" width = "150" >Modified Date</ th > </ tr > </ thead > </ table > |
爲了放置加載子節點,咱們須要爲每一個節點重命名'children'屬性。 正以下面的代碼所示,'children'屬性重命名爲'children1'。 當展開一個節點時,咱們調用'append'方法來加載它的子節點數據。
'loadFilter'代碼
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function myLoadFilter(data,parentId){ function setData(data){ var todo = []; for ( var i=0; i<data.length; i++){ todo.push(data[i]); } while (todo.length){ var node = todo.shift(); if (node.children && node.children.length){ node.state = 'closed' ; node.children1 = node.children; node.children = undefined; todo = todo.concat(node.children1); } } } setData(data); var tg = $( this ); var opts = tg.treegrid( 'options' ); opts.onBeforeExpand = function (row){ if (row.children1){ tg.treegrid( 'append' ,{ parent: row[opts.idField], data: row.children1 }); row.children1 = undefined; tg.treegrid( 'expand' , row[opts.idField]); } return row.children1 == undefined; }; return data; } |
下載EasyUI示例:easyui-treegrid-demo.zip
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