Custom crafting table

I'd like to create a custom crafting table for a mod (but no, I swear!). I've followed the tutorials given and made them, but they don't work like classic crafting tables: 
- The output doesn't fill up with an item when the craft is correct, so that it can be previewed.
- To craft, you need to press a button, which empties the input and fills the output. This makes the action irreversible, more complex in the event of error, and quite different from the classic one.
If anyone has an idea of how I could do this, I'd love to hear it - this post isn't urgent.

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