QW在QT Creator控件中显示:
copy qwt/lib/* %SDK%/QtCreator/lib/qtcreator/
copy qwt/designer/plugins/designer/* %SDK%/QtCreator/lib/qtcreator/plugins/designer

http://qt-project.org/doc/qtcreator-2.7/adding-plugins.html

http://www.cnblogs.com/skaco/p/3384918.html

http://blog.sciencenet.cn/blog-623402-506620.html