Chapter 10. Command Pattern

In This Chapter

Understanding the Command Pattern 137 Building a Simple Command Application 139 Making Commands Undoable and keeping Command histories 146 Building an Undoable Application 148 Building a Redoable Application 153 Using Commands to Build a Proximity game 154 Summary 168

The Command pattern encapsulates functionality into a class. Although the pattern might appear simplistic, don’t let its simplicity deceive you. The Command pattern is a powerful way for enabling a range of features that would be difficult to implement using a different approach. Here are some of the most common uses of the Command pattern: