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... bizarre behavior - a list of checkboxes, last selected of which can not be unselected. There is nothing stopping the user from unselecting all checkboxes, unless you force that situation. You shouldn't force that situation. Going with the assumption that a confirmation action is required to commit the information, that action simply need not be ...


This is where validation comes into play. It's a tricky subject but almost every app of meaningful size has some kind of validation. In your case, I would recommend something like this. download bmml source – Wireframes created with Balsamiq Mockups If they then attempt to move on, save, navigate away or whatever else, you prevent them from ...

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