我正在使用 fancytree 插件来创建树视图。我的所有数据都通过 ajax 和 json 加载到扩展中。如果用户检查父节点，我也有加载子节点的代码，因为如果该节点没有首先展开，它们在技术上没有加载。
我的问题是，如果您有 3 级深的父子关系，并扩展到 2 级，则不会检查第三级。
本质上我有这样的东西
Parent1
-->Child1
---->Child1-1
---->Child1-2
---->Child1-3
-->Child2
现在，如果您从不展开 parent 并检查它，则所有节点都会被加载并检查。但是，如果您展开父节点 1 以显示子节点 1 和 2，然后检查 parent1，子节点 1-1 到 3 永远不会被加载或检查。这是我必须在检查时加载子节点的代码，我缺少什么。
select: function (event, data) { //here's where I need to load the children for that node, if it has them, so they can be set to checked
var node = data.node;
//alert(node.key);
if (node.isSelected()) {
if (node.isUndefined()) {
// Load and select all child nodes
node.load().done(function () {
node.visit(function (childNode) {
childNode.setSelected(true);
});
});
} else {
// Select all child nodes
node.visit(function (childNode) {
childNode.setSelected(true);
});
}
// Get a list of all selected nodes, and convert to a key array:
var selKeys = $.map(data.tree.getSelectedNodes(), function (node) {
treeHash[node.data.treeItemType + node.key] = node.key;
});
}
这是我的完整JS仅供参考
if ($("entityTree") != null) {
$(function () {
// Create the tree inside the <div id="tree"> element.
$("#entityTree").fancytree({
source: { url: "/Home/GetTreeViewData", cache: true }
, checkbox: true
, icons: false
, cache: true
, lazyLoad: function (event, data) {
var node = data.node;
data.result = {
url: "/Home/GetTreeViewData/" + node.key.replace(node.data.idPrefix, "")
, data: { mode: "children", parent: node.key }
, cache: true
};
}
, renderNode: function (event, data) {
// Optionally tweak data.node.span
var node = data.node;
var $span = $(node.span);
if (node.key != "_statusNode") {
$span.find("> span.fancytree-expander").css({
borderLeft: node.data.customLeftBorder
//borderLeft: "1px solid orange"
});
}
}
, selectMode: 3
, select: function (event, data) { //here's where I need to load the children for that node, if it has them, so they can be set to checked
var node = data.node;
//alert(node.key);
if (node.isSelected()) {
if (node.isUndefined()) {
// Load and select all child nodes
node.load().done(function () {
node.visit(function (childNode) {
childNode.setSelected(true);
});
});
} else {
// Select all child nodes
node.visit(function (childNode) {
childNode.setSelected(true);
});
}
// Get a list of all selected nodes, and convert to a key array:
var selKeys = $.map(data.tree.getSelectedNodes(), function (node) {
treeHash[node.data.treeItemType + node.key] = node.key;
});
}
else {
delete treeHash[node.data.treeItemType + node.key];
//alert("remove " + node.key);
}
for (var i in treeHash) {
alert(treeHash[i]);
}
}
, strings: {
loading: "Grabbing places and events…",
loadError: "Load error!"
},
})
});
}