Advanced ActionScript 3 with Design Patterns

Chapter 10. Command Pattern

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• 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

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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:

• Building highly reusable components. The Command pattern decouples the ...