擅长:python、mysql、java
<p>这是子菜单焦点<a href="https://web.archive.org/web/20070526022349/http://www.kadjo.net/softdev/?p=54" rel="nofollow noreferrer">explained here</a>固有的问题:</p>
<blockquote>
<p>the submenu doesn't get focus until the menu item it's attached to is clicked (even though the submenu appears when the mouse is over the menu item.)</p>
<p>The upshot is that items in the sub menu don't emit the activate signal unless the parent menu item is clicked first.</p>
</blockquote>
<p>这就解释了为什么键盘导航似乎有效。在</p>
<p>我已经花了一年多的时间来解决这个问题,但是我不知道有什么解决方法-只有你发现的<code>"button-press-event"</code>解决方法。在</p>