问关于Custom Widget章的两个失效链接 [复制链接]

在第五章Custom Widget 第二节 Subclassing QWidget 中

原文里 “In practice, before diving in and creating a custom widget, it is always worth checking whether the widget is already available, either as a Qt Solution (http://www.trolltech.com/products/qt/addon/solutions/catalog/4/) or from a commercial or non-commercial third party (http://www.trolltech.com/products/qt/3rdparty/), since this could save a lot of time and effort. In this case, we will assume that no suitable widget is available, and so we will create our own.   ”给出的两个链接均已失效。

所以想问问看，以下的这两个链接如今应该是什么地址？
http://www.trolltech.com/products/qt/addon/solutions/catalog/4/
http://www.trolltech.com/products/qt/3rdparty/

书中翻译的时候有给出么？