可以是实现按纽颜色的改变 按纽本身具有颜色，指针经过颜色改变，触发时也改变-it is the color of button button itself has changed color after color change indicator, also trigger changes

Introduction Wireless signal status indicator is a simple tray application which gives continuous status information about the signal strength, signal quality, and link status. The application is rich in UI to show all these details in an effectiv