daveray/seesaw — pull request #145 by ummels (2013-06-05 08:59:10+00:00)
Title: Add confirm function in seesaw.core.

This adds a convenience function for getting a confirmation from the user, similar to the alert and input functions.

Wraps JOptionPane/showConfirmDialog internally.

Returns true, false, or nil depending on which button the user clicked.