我有一个网页,我希望在jQuery的帮助下动态显示基于JSON数组的树。我树的每个节点都有一个与之关联的复选框。当我点击一个有孩子的节点时,我想要检查所有这些节点。我已经处理了打印树和复选框的问题,现在我正在尝试选择子节点,但我无法做到。
以下是我到目前为止的代码(简化)。有没有人知道如何在使用jQuery检查复选框时自动检查子复选框?
谢谢!
<html>
<head>
<script type="text/javascript" src="jquery-1.3.2.min.js"></script>
<script type="text/javascript">
var myJSON = {
"d": {
"__type": "Branch",
"Name": "$",
"FullPath": "$\\$",
"SubBranch": [
{
"__type": "Branch",
"Name": "System",
"FullPath": "$\\System",
"SubBranch": [
{
"__type": "Branch",
"Name": "Library",
"FullPath": "$\\System\\Library",
"SubBranch": [
]
},
{
"__type": "Branch",
"Name": "Configuration",
"FullPath": "$\\System\\Configuration",
"SubBranch": [
{
"__type": "Branch",
"Name": "Reimage",
"FullPath": "$\\System\\Configuration\\Reimage",
"SubBranch": [
]
},
{
"__type": "Branch",
"Name": "Installation",
"FullPath": "$\\System\\Configuration\\Installation",
"SubBranch": [
]
}
]
},
]
}
]
}
}
var output;
var indentationLevel = 0;
function GetSpacing(numberOfSpaces) {
var tabs = '';
for (i = 0; i < numberOfSpaces; i++) {
tabs += ' ';
}
return tabs;
}
function GetHtmlForFeaturePath(featurePath) {
return '<div>' + GetSpacing(indentationLevel) + '<input type="checkbox" id="' + featurePath.FullPath + '" class="featureTreeCheckbox" />' + featurePath.Name + "</div>";
}
function GetHtmlForFeaturePaths(node) {
output += GetHtmlForFeaturePath(node);
indentationLevel++;
jQuery.each(node.SubBranch, function() {
GetHtmlForFeaturePaths(this);
});
indentationLevel--;
}
String.prototype.startsWith = function(str) {
return this.match("^" + str) == str;
}
window.onload = function() {
GetHtmlForFeaturePaths(myJSON.d);
document.writeln(output);
/* How do I tell a node to check its children? */
$('input').click(function(event) {
var clickedControlId = this.id;
alert(clickedControlId);
/* alert($.grep(myJSON.d, function (a) { return a.FullPath == clickedControlId })); */
});
}
</script>
</head>
<body>
<a href="http://jquery.com/">jQuery</a>
</body>
</html>
答案 0 :(得分:3)
用空格区分等级不是一个好习惯。相反,你应该使用类或id。这有助于外观(可以使用css)和代码,因为它定义了逻辑级别。
编辑代码以生成类似的DOM:
<div class="level1">
<input id="$\$" class="featureTreeCheckbox" type="checkbox">$
<div class="level2">
<input id="$\System" class="featureTreeCheckbox" type="checkbox">System
<div class="level3">
<input id="$\System\Library" class="featureTreeCheckbox" type="checkbox">Library
</div>
<div class="level3">
<input id="$\System\Configuration" class="featureTreeCheckbox" type="checkbox">Configuration
<div class="level4">
<input id="$\System\Configuration\Reimage" class="featureTreeCheckbox" type="checkbox">Reimage<br/>
<input id="$\System\Configuration\Installation" class="featureTreeCheckbox" type="checkbox">Installation
</div>
</div>
</div>
</div>
每个“levelx”类定义一个级别。您可以像这样轻松地设置样式:
<style>
.level1 { margin-left: 0px; }
.level2 { margin-left: 10px; }
.level3 { margin-left: 20px; }
.level4 { margin-left: 30px; }
</style>
然后你可以使用这样的代码:
<script type="text/javascript">
$(function() {
$('div.level1 input').change(function(event) {
if ($(this).is(":checked")) {
$(this).parent().find("input").attr("checked", "checked");
}
});
$('div.level2 input').change(function(event) {
if ($(this).is(":checked")) {
$(this).parent().find(".level3 input").attr("checked", "checked");
$(this).parent().find(".level4 input").attr("checked", "checked");
}
});
$('div.level3 input').change(function(event) {
if ($(this).is(":checked")) {
$(this).parent().find(".level4 input").attr("checked", "checked");
}
});
});
</script>
答案 1 :(得分:3)
我简化了kgiannakakis所做的事情:
$(function() {
$('div input:first').change(function(event) {
if ($(this).is(":checked")) {
$(this).next("div").find("input").attr("checked", "checked");
} else {
$(this).next("div").find("input").removeAttr("checked");
}
});
});
这适用于任何级别。