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GuruMeditation
Docs » Autodocs » intuition.library » AddGadget

NAME

	AddGadget -- Add a gadget to the gadget list of a window.

SYNOPSIS

	RealPosition = AddGadget( Window, Gadget, Position )
	D0			  A0      A1      D0
	UWORD  AddGadget( struct Window *, struct Gadget *, UWORD );

FUNCTION

	Adds the specified gadget to the gadget list of the given window,
	linked in at the position in the list specified by the position 
	argument (that is, if Position == 0, the gadget will be inserted
	at the head of the list, and if Position == 1 then the gadget will
	be inserted after the first gadget and before the second).  If the
	position you specify is greater than the number of gadgets in the
	list, your gadget will be added to the end of the list.
	Calling AddGadget() does not cause your gadget to be redisplayed.
	The benefit of this is that you may add several gadgets without
	having the gadget list redrawn every time.
	This procedure returns the position at which your gadget was added.
	NOTE:  A relatively safe way to add the gadget to the end of the 
	list is to specify a position of -1 (i.e., (UWORD) ~0).  That way,
	only the 65536th (and multiples of it) will be inserted at the wrong
	position.  The return value of the procedure will tell you where it was 
	actually inserted.
	NOTE:  The system window gadgets are initially added to the
	front of the gadget list.  The reason for this is:  If you position
	your own gadgets in some way that interferes with the graphical
	representation of the system gadgets, the system's ones will be "hit"
	first by user.  If you then start adding gadgets to the front of the
	list, you will disturb this plan, so beware.  On the other hand, if
	you don't violate the design rule of never overlapping your gadgets,
	there's no problem.  
	NOTE:  You may not add your own gadgets to a screen.  Gadgets may
	be added to backdrop windows, however, which can be visually similar,
	but also provide an IDCMP channel for gadget input messages.

INPUTS

	Window = pointer to the window to get your gadget
	Gadget = pointer to the new gadget
	Position = integer position in the list for the new gadget (starting
	    from zero as the first position in the list)

RESULT

	Returns the position of where the gadget was actually added.

BUGS

SEE ALSO

AddGList(), RemoveGadget(), RemoveGList()

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