为什么这个 XBL 示例不起作用？
此示例来自此 Mozilla 页面。
main.xul
<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
<?xml-stylesheet href="main.css" type="text/css"?>
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<box id="num" class="labeledbutton" title="Number of Things:" value="52"/>
<button label="Show" oncommand="document.getElementById('num').showTitle(true)"/>
<button label="Hide" oncommand="document.getElementById('num').showTitle(false)"/>
</window>
main.css
box.okcancelbuttons {
-moz-binding: url('main.xml#labeledbutton');
}
main.xml
<?xml version="1.0"?>
<binding id="labeledbutton">
<content>
<xul:label xbl:inherits="value=title"/>
<xul:label xbl:inherits="value"/>
</content>
<implementation>
<method name="showTitle">
<parameter name="state"/>
<body>
if (state) document.getAnonymousNodes(this)[0].
setAttribute("style","visibility: visible");
else document.getAnonymousNodes(this)[0].
setAttribute("style","visibility: collapse");
</body>
</method>
</implementation>
</binding>
为什么当我单击按钮时不显示该框？
This example is from this Mozilla's page.
main.xul
<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin/" type="text/css"?>
<?xml-stylesheet href="main.css" type="text/css"?>
<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
<box id="num" class="labeledbutton" title="Number of Things:" value="52"/>
<button label="Show" oncommand="document.getElementById('num').showTitle(true)"/>
<button label="Hide" oncommand="document.getElementById('num').showTitle(false)"/>
</window>
main.css
box.okcancelbuttons {
-moz-binding: url('main.xml#labeledbutton');
}
main.xml
<?xml version="1.0"?>
<binding id="labeledbutton">
<content>
<xul:label xbl:inherits="value=title"/>
<xul:label xbl:inherits="value"/>
</content>
<implementation>
<method name="showTitle">
<parameter name="state"/>
<body>
if (state) document.getAnonymousNodes(this)[0].
setAttribute("style","visibility: visible");
else document.getAnonymousNodes(this)[0].
setAttribute("style","visibility: collapse");
</body>
</method>
</implementation>
</binding>
Why it is not showing the box when I click the button?
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评论（2）
尝试一下
XUL(main.xul)
CSS(main.css)
XBL(main.xbl)
Just try it out
XUL(main.xul)
CSS(main.css)
XBL(main.xbl)
有几个问题：
首先在 main.css 中定义了一个
okcancelbuttons类，但在 main.xul 中引用了一个labeledbutton类。该类可以像绑定一样被调用。其次，main.xml只是无效的xml（最简单的验证方法是将其加载到firefox中，它会吐出错误）。
您使用的每个命名空间都需要
xmlns属性。在本例中是“主”命名空间 xbl 和 xul。它们应该在它最终会像这样：
main.xml
There are a few problems :
First of all in main.css you define a class
okcancelbuttonsyet in main.xul you refer to alabeledbuttonclass. The class can be called the same as the binding.Secondly main.xml is just not valid xml (simplest way to validate is to load it up in firefox and it'll spit out errors).
It needs
xmlnsattributes for each namespaces you use. In this case the "main" namespace, xbl and xul. They should be defined in the missing<bindings>element around the<binding>element.It'll end up like this :
main.xml