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Hi - my nam is Roger and I'll be glad to assist.
If the father has been fairly absent from the child's life, and if your daughter has been the primary parent (parent who child lives with) and if there has been no material change in circumstances that would be detrimental to the child and justify a modification, it would seem highly unlikely that a court would entertain a request for full custody by the father.
The only apparent change would be your daughter graduating from school, but that shouldn't be viewed as something detrimental to the child's well-being, and given the child's age, I assume he is in school during the day/the majority of the work day. So, that likely would qualify as a basis for the father to seek a modification.