我正在尝试让 jsTree (1.0-rc3) 与 Knockout.js (2.2.1) 一起使用。
参见示例 jsFiddle：http: //jsfiddle.net/adeconsulting/qfr6A/
注意：我在 Fiddle 中包含了几个 JS 资源，以尽可能接近我的 Visual Studio 项目，以防可能导致此问题的库之间存在冲突。
运行 Fiddle 并浏览 jsTree，它是按物理位置和类型列出的服务器列表。它有助于打开 Firebug 的控制台，这样您就可以看到 ajax 调用和响应。单击叶节点时，将进行 ajax 调用以检索服务器详细信息并显示其值使用 Knockout 绑定的表单。选择非叶节点时隐藏表单。
它在您第一次单击叶节点时起作用。之后，Knockout 不会更新叶节点点击的表单。但是，如果您碰巧单击了“编辑”按钮，则会突然显示最新的服务器详细信息。
我认为 jsTree 和 Knockout 绑定之间存在冲突，但不知道从哪里开始解决可能的问题。
由于 stackoverflow 显然需要至少一个代码块，这里是 Fiddle 的 JavaScript 部分：
// Global vars:
var prevJsTreeNodeId = null;
var serverModelBindingsApplied = false;
var serverLoadInProgress = false;
/*
* The knockout.js view model
*/
var ServerViewModel = function () {
// Data
var self = this;
self.IsReadOnly = ko.observable(true); // the form's input mode
self.btnEditSave = ko.observable("Edit"); // the Edit/Save button text
self.Server = ko.observable({}); // the Server object
// Operations
self.setEditable = function () {
self.IsReadOnly(false);
self.btnEditSave("Save");
};
self.setReadOnly = function () {
self.IsReadOnly(true);
self.btnEditSave("Edit");
};
self.doEditSave = function () {
var flag = self.IsReadOnly();
if (flag) {
// switch to Edit mode
self.setEditable();
}
else {
// switch back to readOnly
self.setReadOnly();
}
};
// use ajax to update the knockout.js view model's Server object for the specified server name
self.load = function (serverName) {
if (!serverLoadInProgress) {
serverLoadInProgress = true;
// use ajax to retrieve the server's details
var data = {
json: JSON.stringify({
ServerName: serverName,
PrimaryIP: "1.2.3.4",
BrandDesc: "Dell",
OSDesc: "Windows 2003 Server",
Location: "xyz"
}),
delay: 1
};
$.ajax({
url:"/echo/json/",
data:data,
type:"POST",
success:function(response)
{
console.log(response);
window.ServerViewModelInstance.Server = ko.mapping.fromJS(response);
// apply bindings the first time we retrieve a Server object
if (!serverModelBindingsApplied) {
ko.applyBindings(window.ServerViewModelInstance,
document.getElementById('servercontent'));
serverModelBindingsApplied = true;
}
else {
// hmmm... updating the view model's .Server property doesn't trigger the
// form to be updated, yet if we click the Edit button, the new values
// suddenly appear, so try emulating that here...
self.setReadOnly();
}
}
});
serverLoadInProgress = false;
}
};
}; // ServerViewModel
/*
* document load
*/
$(function () {
// configure the jsTree
$("#divtree")
.jstree({
"themes": { "theme": "default", "dots": true, "icons": true },
"plugins": ["themes", "html_data", "ui", "types"],
"types": {
"type_attr": "tag", // the attribute which contains the type name
"max_depth": -2, // disable depth check
"max_children": -2, // disable max children check
"valid_children": ["root"],
"types": {
"root": {
"valid_children": ["level1"]
},
"level1": {
"valid_children": ["level2"],
"start_drag": false,
"move_node": false,
"delete_node": false,
"remove": false
},
"level2": {
"valid_children": ["leaf"],
// use the theme icon for the level2 nodes
"start_drag": false,
"move_node": false,
"delete_node": false,
"remove": false
},
"leaf": {
"valid_children": "none"
}
}
}
});
// register to receive notifications from #divtree when a jsTree node is selected
$("#divtree").bind("select_node.jstree", function (event, data) {
// data.rslt.obj is the jquery extended node that was clicked
var key = data.rslt.obj.attr("key");
var id = data.rslt.obj.attr("id");
if (id == prevJsTreeNodeId) {
// user clicked the same node, nothing to do
return;
}
prevJsTreeNodeId = id;
// when a jsTree node is selected, reset the knockout.js view model to read only
window.ServerViewModelInstance.setReadOnly();
var idx = key.indexOf("Server");
if (idx === 0) { // "Server|servername"
// show the "servercontent" div
$("#servercontent").show();
// display the server details
var serverName = key.substr(idx + 7, key.length);
window.ServerViewModelInstance.load(serverName);
}
else {
// hide the "servercontent" div
$("#servercontent").hide();
}
});
// hide the "servercontent" div
$("#servercontent").hide();
// instantiate the knockout.js view model
window.ServerViewModelInstance = new ServerViewModel();
}); // document ready
// initialization timer routine to select the main jsTree node
setTimeout(function () {
// open the root node
$.jstree._reference("#divtree").open_node("#root");
}, 500);