What's the design pattern I must draw attention when i develop vector editor?

What's开发者_如何学Go the design pattern I must draw attention when i develop vector editor?

Now I use composite pattern (composite draw objects) and fabric method - for creation draw objects, which make user.

And what is the patterns i can use for my vector editor?

Most likely you need these:

• Composite Pattern
• Visitor Pattern
• Command Pattern

And after that, you may need these as well:

• Strategy
• Decorator
• Observer