jquery - 使用新的 json 数据重新创建整个 jstree 实例

Question

我希望用新的 json 数据替换 jstree 树的全部内容。

我使用的是 2011 年 7 月 25 日从 github 下载的 jsTree 1.0

假设我有这个功能...

function init_my_tree(my_json_data)
{
  $("#demo1").jstree({
    themes: {
      "theme": "classic",
      "dots": false,
      "icons": true,
      "url": "//js.myliburl.com/jstree/themes/classic/style.css"
    },
    json : {
      data : my_json_data
    },
    plugins : [ "core","ui","themes", "json" ]
  });
}

其中 demo1 指的是

<div id="demo1"></div> 

我想做的是用我从服务器加载的新数据完全替换树。然而，出于这个问题的目的，让我们假设我只想这样做......

$(document).ready(function() {
  var text_data = '[{"title":"All","data":{"jstree":{"opened":true}},"children":[{"title":"Item 1","data":{"jstree":{}},"children":false,"li_attr":{"id":"1","class":"jstree-leaf","href":"#"},"a_attr":{"href":"#"}},{"title":"Item B","data":{"jstree":{}},"children":false,"li_attr":{"id":"2","class":"jstree-last","href":"#"},"a_attr":{"href":"#"}}],"li_attr":{"id":"0","class":"jstree-last","href":"#"},"a_attr":{"href":"#"}}]';
  var my_json_data = $.parseJSON(text_data); 
  init_my_tree(my_json_data);  // initialize the tree view

  text_data = '[{"title":"Something Else","data":{"jstree":{"opened":true}},"children":[{"title":"Item A","data":{"jstree":{}},"children":false,"li_attr":{"id":"1","class":"jstree-leaf","href":"#"},"a_attr":{"href":"#"}},{"title":"Item 2","data":{"jstree":{}},"children":false,"li_attr":{"id":"2","class":"jstree-last","href":"#"},"a_attr":{"href":"#"}}],"li_attr":{"id":"0","class":"jstree-last","href":"#"},"a_attr":{"href":"#"}}]';
  my_json_data = $.parseJSON(text_data); 
  init_my_tree(my_json_data);  // re-initialize the tree view to load with new data

});

我是根据这个链接来做这件事的，伊万似乎在提倡这个 http://groups.google.com/group/jstree/browse_thread/thread/b40a1f0ab0f9a66b?fwc=2

但是，发生的情况是，在第二次调用 init 时，我最终在 firebug 中收到此错误

instance._get_settings is not a function

我尝试调用 destroy

$("#demo1").jstree("destroy");

但这并没有解决我的问题。

如何用新的 json 数据替换整个树？

Answer 1

这是我解决这个问题的方法:- 将树的所有绑定(bind)和初始化包装在一个函数中- 从我的 document.ready 函数调用此函数(这处理树的初始设置)- 在我的ajax调用的成功回调中，我销毁树然后再次调用该函数

代码如下:

function loadTargetTree() {
    $("#target-book-tree").bind("select_node.jstree", function (e, data) {
      data.rslt.obj; // the LI node that was clicked
      selectedTargetID = data.rslt.obj.attr("id");
      if(data.rslt.obj.hasClass("book") || data.rslt.obj.hasClass("section")) {
        targetChapterIsSelected = false;
        toggleCopyTools()
      } else {
        targetChapterIsSelected = true;
        toggleCopyTools();
        target_parent_id = selectedTargetID;
      }
    });

    $("#target-book-tree")
        .jstree({
            core : {
                "initially_open" : ["book_"+getParameterByName('target_book_id')],
                "animation": 100
                },
            "plugins":["themes","html_data","ui"],
            "themes" : {
                "theme" : "classic",
                "dots" : true,
                "icons" : false
                },
            "ui" : {
                "select_limit" : 1,
                "selected_parent_close" : "deselect",
                },
        });
}


$(document).ready(function() {
    loadTargetTree();
});



AND MY AJAX CALL:

    var sendData = 'new_name='+$('input#new_name').val()+'&target_book_id='+target_book_id + '&source_lib_id='+source_lib_id + '&target_parent_id='+target_parent_id;
    $.ajax({
          dataType: "json",
       type: "POST",
       url: "/ajax/CopySelectedSection",
       data: sendData,
        error: function(data) {
            alert("Oops! An error occured. Please try again later.")
        },
        success: function(data) {
                if (data['status'] == "ok") {
                    $("div#target-book-tree").html(data['book_outline']);
                    $("#target-book-tree").jstree('destroy');
                    loadTargetTree();
                } else {
                    alert("Sorry, ...");
                }
        }
     })