实现了一个Graphicview窗口，用户可以向其中添加一些预定义了的图形（可以设置图形的填充颜色），text（可以设置字体和颜色等）等。另外这些图形可以随着用户鼠标的移动而移动。-Graphicview implements a window, the user can add some pre-defined one of the graphics (you can set the fill color graphics), text (can set the fonts and color

此程序实现停靠窗口QDockWidget类的使用，窗口一在主窗口的左边和右边停靠，窗口2只可浮动和右部停靠两种状态间切换，并且不可移动；窗口2可实现停靠窗口的各个状态。-Dock the window QDockWidget class use of this program, the window in the left and right of the main window docked window 2 can only switch between the floating and t