In the text, we discuss the following topics in detail: MVC model, event handling, layout management, painting component, undoing and redoing, dragging and dropping, multi-thread processing and so on.

• 在文中,我们从以下几个方面对图组件库进行了详细讨论:MVC模式、事件处理、布局管理、绘制组件、撤消重做、拖放和多线程处理。