Extjs4-Tree-Store

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/*
*钱邓水
*Ext4 tree getStore bug
*/
//extends 重写treeStore 加载机智
Ext.override(Ext.data.TreeStore, {
load: function(options) {
options = options || {};
options.params = options.params || {};


var me = this,
node = options.node || me.tree.getRootNode(),root;


// 如果是根，就让它展开
// create one for them.
if (!node) {
node = me.setRootNode({
expanded: true
});
}


if (me.clearOnLoad) {
node.removeAll(false);
}


Ext.applyIf(options, {
node: node
});
//动态加载时，判断是加载前是否清理Store node
options.params[me.nodeParam] = node ? node.getId() : 'root';


if (node) {
node.set('loading', true);
}

return me.callParent([options]);
}
});