Who can write a form click event function of the color change?
谁能写一个表格单击事件颜色变化的函数?
The client has to inherit that interface and implement an event function if it wants to handle that event.
客户端必须继承接口,并实现它需要处理事件的事件函数。
Each event function contains two forms: one without any arguments, and one that contains a function as an argument.
每个事件函数都包含两种形式:一个没有任何参数,一个包含一个函数作为参数。
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