代码是实现类似QQ的聊天在界面功能，并且能够聊天，是在QT5.3下编译的-Code is to achieve a similar QQ chat interface function, and can chat, was compiled under QT5.3

qt程式設計開發工具書 包含大量語法教學-qt programming development tool consists of a large number of grammar teaching

Qt5.7.0 2D绘图.表盘时钟+数字时钟 有比较详细的注释 其他功能:允许选择表针颜色（和刻度对应） 选择表盘字体字号 -. Qt5.7.0 2D graphics digital clock dial clock+ a more detailed notes Additional features: Allows you to the color of the hands (and the corresponding scale) dial font size