Command Behavior Pattern allows you to be able to organize, track, revoke, and call these behaviors easier in the performance layer (PRESENTATION LAYER).
In real life, the order is difficult to control. Once some things are in motion, we are difficult to operate the discrete part of this action. Of course, it is impossible to revoke some action in real life. However, in the programming process, the order is not difficult to ponder. If your plan is correct, you can define action, then use your favorite way to control these actions. A very useful tool to implement this operation is the command behavior mode.
Command behavior mode is a simple mode we can use. It is especially beneficial to the specificization of the Action concept and cancellation behavior. Converting behavior to the object is also a very orderly way, which ensures that each operation is concentrated on part of the code.
In this article we will study the use of command behavior patterns, you will feel it interesting. I added a picture of a ball to the form, and realized the command of the mobile process of the ball. Each ball command is placed in the stack, allowing you to revoke the movement of the ball, or re-view the movement of the ball. After slightly patching the code, you can find that the performance layer (GUI) operation is converted to a command object such that we use a variety of ways (such as buttons and menus) package, organization, tracking, revocation, and call operations.
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Control GUI action in VB6 command behavior mode
