这是一个左侧漂亮的工具栏控件源代码直接可以引用，有一点Office风格。-This is a pretty left of the toolbar control can refer directly to the source code, a little Office style.

QtGui实现自定义控件源码，此控件是左侧一列导航栏-QtGui to achieve a custom control source code, this control is the left column navigation bar