缩放、旋转和平移的投影演示 先打开一个.zlg文件 滑动鼠标滚轮进行缩放 移动鼠标同时按住中键进行旋转 移动鼠标同时按住左键与右键进行平移 框架MFC编写-zoom, Rotation and translation of the projector to open a demo. zlg paper sliding scale for the mouse wheel while holding down the mou

实现了鼠标交互的所有功能,包含对绘制的图形通过鼠标滚轮进行无极缩放以及任意拖动.-Mouse interaction achieved all the features included on the map graphics through mouse wheel to zoom Promise and arbitrary drag.