Shulou(Shulou.com)06/01 Report--

This article introduces the relevant knowledge of "what is the applicability of web command mode". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

Applicability

When we want to model an action, we can use the Command pattern. For example:

If the menu toolbar is built statically, the basic approach is to write the code that implements the function directly in the corresponding handler. If you are building a menu or toolbar button dynamically, you need to encapsulate the action as a Command object and pass it as a parameter to the menu item or toolbar button.

The timing and context of the choice and execution of the action are different. For example, the user may select the action to be performed in the UI process, and the execution of this action may occur in another process and at another time. At this point, you need to encapsulate the action as a Command object to pass between processes.

When actions are encapsulated in a Command object, they can be performed repeatedly. When a large number of actions need to be repeated, such as compilation, and so on, you can consider using the Command pattern. If the reverse operation of the action is implemented at the same time, both Undo and Redo operations can be supported.

This is the end of the content of "what is the applicability of web command mode". Thank you for reading. If you want to know more about the industry, you can follow the website, the editor will output more high-quality practical articles for you!

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.