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通过分析列车运行图的绘制规范,抽象出运行线的绘制模型;运用面向对象的设计方法,设计运行线及运行图其他部分的类层次结构;最后结合双缓冲技术实现图形的高效绘制。
By analyzing the drawing rules of the train operation diagram, the drawing model of the operation line is abstracted. By using the object-oriented design method, the class hierarchy of the operation line and other parts of the operation diagram is designed. Finally, the double-buffering technique is used to draw the drawing efficiently.