获取一个dojo节点，当我有商店项目ID [英] getting a dojo node when I have the store item id

问题描述

我有一个 dijit.Tree ，它使用JSON填充一个 ItemFileReadStore 。由于我们的设置，每次点击一个树节点时，我需要做一个新的请求。该树正在使用Cookie来记住哪些文件夹已经被扩展了，所以这不是问题。但是我试图将焦点设置为点击的节点。

I have a dijit.Tree that's populated by a ItemFileReadStore using JSON. Because of our setup, I need to do a new request each time a tree node is clicked. The tree is using cookies to remember which folders were expanded and not, so that's not a problem. But I'm trying to set focus to the node that was clicked.

我已经设法从商店模型中获取项目，将其ID设置为参数url：

I've managed to get the item from the store model by setting its id as a parameter in the url:

store.fetchItemByIdentity({identity:openNode, onItem:focusOpenNode(item)});
function focusOpenNode(item) {
    //I've got the item, now how do I get the node so I can do:
    var node = getNodeFromItem(item); //not a real method...
    treeControl.focusNode(node);
}

但我似乎找不到一种方法来获得匹配的节点

but I can't seem to find a way to get the matching node from the item id.

推荐答案

当您创建treeControl时，作为构造函数参数中的一个参数传递或使用dojo。 mixin添加到树小部件中：

When you create the treeControl, pass in as one of the params in the constructor params or use dojo.mixin to add to the tree widget:

/*tree helper function to get the tree node for a store item*/
getNodeFromItem: function (item) {  
    return this._itemNodesMap[item.name[0]];
}

（使用树的商店getAttribute来获取名称这个项目 - 但是这个例子不是抛光的。）

(It would be neater to use the tree's store getAttribute to get the name of the item - but this example is not polished.)

然后你可以这样做：

function focusOpenNode(item) {
    //I've got the item, now how do I get the node so I can do:

    var node = treeControl.getNodeFromItem(item); //now a real method...
    treeControl.focusNode(node);
}

这篇关于获取一个dojo节点，当我有商店项目ID的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！