我正在尝试单击父节点上的子节点。我找不到选择api的任何示例。我应该改用复选框吗？
<button id="btn">Highlight third row</button>
<div id="treeList"></div>
<script>
$("#treeList").kendoTreeList({
columns: [
{ field: "id" },
{ field: "name" },
{ field: "age" }
],
dataSource: [
{ id: 1, parentId: null, name: "Jane Doe", age: 22, expanded: true },
{ id: 2, parentId: 1, name: "John Doe", age: 24 },
{ id: 3, parentId: 1, name: "Jenny Doe", age: 3 }
],
selectable: "multiple row"
});
</script>
如果要选择“ 1”（父级最高，请选择2,3（子节点），我会尝试这样做。希望有针对javascript实现的本机解决方案。感谢您的建议！
选择状态由TreeList在数据项行呈现<tr k-state-selected>中维护，并且该状态未反映在TreeList dataSource中。此外，数据源是可发现子关系的唯一位置。因此，有一些来回处理选择项和子项的问题。
[TreeList也没有select之类的TreeView事件，因此，开箱即用时您不知道选择或取消选择了哪个节点。
change事件在一个动作导致选中或取消选中一行或多行（如可以单击shift时触发）时触发。在change处理程序中，您只能使用select()方法知道所有选定行的当前状态。
因此，在change内，您需要跟踪先前的选择状态和当前的选择状态以查找哪个行更改的选择状态，这将使他们的子级根据您的要求被选择或取消选择。
See this Dojo例如。这并不完美，因为在change事件中，您只能确定选定的节点，而不知道是否发生了“重新选择”（即再次单击选定的行）。无论如何，在TreeList层次结构中的下降是递归执行的，并且依赖于dataSource数据项属性.hasChildren和dataSource方法.childNodes()
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<title>TreeList select (change)</title>
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2020.1.219/styles/kendo.common.min.css">
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2020.1.219/styles/kendo.rtl.min.css">
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2020.1.219/styles/kendo.default.min.css">
<link rel="stylesheet" href="https://kendo.cdn.telerik.com/2020.1.219/styles/kendo.mobile.all.min.css">
<script src="https://code.jquery.com/jquery-1.12.3.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2020.1.219/js/angular.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2020.1.219/js/jszip.min.js"></script>
<script src="https://kendo.cdn.telerik.com/2020.1.219/js/kendo.all.min.js"></script></head>
<body>
<p><a target="_blank" href="https://docs.telerik.com/kendo-ui/api/javascript/ui/treelist">TreeList docs</a></p>
<div id="treeList"></div>
<script>
selected_uids = []; // track selected uids
autoselecting = false;
$("#treeList").kendoTreeList({
columns: [
{ field: "id" },
{ field: "name" },
{ field: "age" }
],
dataSource: [
{ id: 1, parentId: null, name: "Jane Doe", age: 22, expanded: false },
{ id: 2, parentId: 1, name: "John Doe", age: 24 },
{ id: 3, parentId: 1, name: "Jenny Doe", age: 3 },
{ id: 4, parentId: null, name: "Jane Mack", age: 22, expanded: false },
{ id: 5, parentId: 4, name: "John Mack", age: 24 },
{ id: 6, parentId: 4, name: "Jenny Mack", age: 3 }
],
selectable: "multiple row",
change: function(e) {
if (autoselecting) {
e.preventDefault();
return;
}
debugger;
autoselecting = true;
var selected_rows = this.select();
console.log ('desel',selected_rows, selected_uids);
// check for new deselections
for (var index = 0; index < selected_uids.length; index++) {
var selected_uid = selected_uids[index];
if (selected_uid) {
var row = $("tr[data-uid='" + selected_uid + "'].k-state-selected");
if (row.length == 0) {
// no such selected row for one that was previously tracked as selected
deselectChildren(this, selected_uid);
selected_uids[index] = null; // untrack
}
}
}
var selected_rows = this.select();
console.log ('sel',selected_rows,selected_uids);
// check for new selections
for (var index = 0; index < selected_rows.length; index++) {
var data = this.dataItem(selected_rows[index]);
console.log('data',data);
if (jQuery.inArray(data.uid, selected_uids) == -1) {
// new selection
selected_uids.push(data.uid);
selectChildren(this, data);
}
}
for (var i=0, j=0; i < selected_uids.length; i++) {
if (selected_uids[i] != null) {
if (i > j) {
selected_uids[j] = selected_uids[i];
}
j++;
}
}
selected_uids.length = j;
autoselecting = false;
},
});
function selectChildren(treeList, data) {
if (!data.hasChildren) return;
var children = treeList.dataSource.childNodes(data);
for (var index = 0; index < children.length; index++) {
var child = children[index];
if (jQuery.inArray(child.uid, selected_uids) == -1) {
selected_uids.push(child.uid);
treeList.select($("tr[data-uid='" + child.uid + "']"));
selectChildren(treeList,child);
}
}
}
function deselectChildren(treeList, uid) {
var data = treeList.dataSource.getByUid(uid);
if (!(data && data.hasChildren)) return;
var children = treeList.dataSource.childNodes(data);
for (var index = 0; index < children.length; index++) {
var child = children[index];
var row = $("tr[data-uid='" + child.uid + "'].k-state-selected");
if (row.length == 1) {
var at = selected_uids.indexOf(child.uid);
if (at >= 0) selected_uids[at] = null;
row.removeClass('k-state-selected');
}
deselectChildren(treeList,child.uid);
}
}
$("#treeList").data("kendoTreeList").select($("#treeList tbody>tr:nth(0)"));
</script>
</body>
</html>