Set jsTree Node to “Undetermined” State

问题:

I'm using jsTree to show a tree with checkboxes. Each level of nodes is loaded on-demand using the json_data plugin.

If a node's descendent is checked, then that node should be in an "undetermined state" (like ACME and USA).

The problem is, the tree starts out collapsed. ACME looks unchecked but should be undetermined. When I finally expand to a checked node, jsTree realizes the ancestors should be undetermined.

So I need to be able to put a checkbox in the undetermined state without loading its children.

With jsTree you can pre-check a box by adding the jstree-checked class to the <li>. I tried adding the jstree-undetermined class, but it doesn't work. It just puts them in a checked state.

Here's my code:

$("#tree").jstree({     plugins: ["json_data", "checkbox"],     json_data: {         ajax: {             url: '/api/group/node',             success: function (groups) {                 var nodes = [];                 for (var i=0; i<groups.length; i++) {                     var group = groups[i];                      var cssClass = "";                     if(group.isSelected)                         cssClass = "jstree-checked";                     else if(group.isDecendantSelected)                         cssClass = "jstree-undetermined";                      nodes.push({                         data: group.name,                         attr: { 'class': cssClass }                     });                 }                 return nodes;             }         }     } }) 

My Question

How do I set a node to the undetermined state?

回答1:

I had the same problem and the solution I found was this one:

var tree = $("#tree").jstree({     plugins: ["json_data", "checkbox"],     json_data: {         ajax: {             url: '/api/group/node',             success: function(groups) {                 var nodes = [];                 for (var i = 0; i < groups.length; i++) {                     var group = groups[i];                     var checkedState = "false";                     if (group.isSelected)                         checkedState = "true";                     else if (group.isDecendantSelected)                         checkedState = "undetermined";                     nodes.push({                         data: group.name,                         attr: { 'checkedNode': checkedState }                     });                 }                 return nodes;             },             complete: function () {                 $('li[checkedNode="undetermined"]', tree).each(function () {                     $(this).removeClass('jstree-unchecked').removeClass('jstree-checked').addClass('jstree-undetermined');                 });                 $('li[checkedNode="true"]', tree).each(function () {                     $(this).removeClass('jstree-unchecked').removeClass('jstree-undetermined').addClass('jstree-checked');                 });                 $('li[checkedNode="false"]', tree).each(function () {                     $(this).removeClass('jstree-checked').removeClass('jstree-undetermined').addClass('jstree-unchecked');                 });             }         }     } }); 

Hope it helps you!

回答2:

Maybe this changed in the meanwhile...

But now (version 3.0.0) the really simple solution works:

{ id : "string" // will be autogenerated if omitted text : "string" // node text icon : "string" // string for custom state : { opened : boolean // is the node open disabled : boolean // is the node disabled selected : boolean // is the node selected undetermined : boolean // is the node undetermined <<==== HERE: JUST SET THIS }, children : [] // array of strings or objects li_attr : {} // attributes for the generated LI node a_attr : {} // attributes for the generated A node }

Learned directly from the source code at: https://github.com/vakata/jstree/blob/6507d5d71272bc754eb1d198e4a0317725d771af/src/jstree.checkbox.js#L318

文章来源: Set jsTree Node to “Undetermined” State