CODEWITHSUNDEEP
c++user-interfacedesign-patterns
green lantern
green lantern

Reputation: 1105

Adding progress bar to calculation

I have a class that does a complex calculation which may take a long time. I'd like to add a progress bar with Abort button. However, I would like to avoid mixing calculation code with GUI code if possible.

Are there any good design patterns for this?

Upvotes: 0

Views: 72

Answers (1)

Andrew McGuinness
Andrew McGuinness

Reputation: 2147

The relevant design pattern is the Observer pattern: your class doing a calculation is the "subject", it maintains a list of Observers, implementing a common Observer interface, and when its state changes (i.e. the amount of progress has changed), it notifies each observer via an update() call.

Upvotes: 2

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