讲述QT编程的经典书籍，无需都说，英文第二版，带源码- Table of Contents| Index Copyright Series Editor s Note Foreword Preface Acknowledgments A Brief History of Qt Part I: Basic Qt Chapter 1. Getting Started Hello Qt Making Connections La

在QT下编写的一个音乐播放器，有进度条，列表，播放音乐等功能。-In QT prepared a music player, a progress bar, lists, play music and other functions.

自定义dockwidget的标题栏,可以最大化最小化(Custom dockwidget title bar, can maximize the minimum)