用于画图，左键是打点，打好两个点后左键点击两个点会产生带有方向的线，用于制作图-Left-click two points for drawing, left-RBI, lay the two points will have with the direction of the line used to produce Figure

页面连线打点等，适合制作页面流程化控件，线和点可以标注不同的颜色，并且能够获取打点链接部分两头的数据(Page connection, RBI and so on, suitable for making page flow control, line and point can mark different colors, and can get RBI link part of the data)