Re: Command pattern: Interaction allowed?


It is perfectly OK to have the U/I present the dialog BEFORE calling the
command. In other words, the command is called by the U/I when the U/I is
certain that it wants the command to occur, and not before.


Aha, interesting. I didn't expect this answer. But don't you encounter
cases where this gets disadvantageous? Because of too much logic within
the UI? Consider also multiple UIs.

About my other assumption: What do you think about a design where the
UI solely triggers the business model. Do you think this is realistic?
Or is it a wrong assumption? Would be nice if I could clarify this for
my self.

.

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