QWT5.01用于Qt开发的二维图形库程序-QWT5.01 for Qt development of the 2D graphics library procedures

qwt5.20说明文档，英文的，pdf格式。-qwt5.20 documentation, in English, pdf format.

qt的学习笔记，从简单的hello qt，连接信号，对话框，菜单和工具条。。。到2D和3D图形系统，opengl调用，非常实用-qt learning notes, from a simple hello qt, connecting signal, dialog, menu and toolbar. . . To 2D and 3D graphics system, opengl calls, very useful

QT widget source, QT widget source.-QT widget source,QT widget source,QT widget source.