🚀 go-pugleaf

In article <8395@shlump.nac.dec.com> nick@deccan.dec.com (Nick Tsivranidis) writes:
>
>	I was under the impression that one could associate a client data
>field with a widget (ala Suntools). Is there such a thing?  Client data
>is a piece of application data (normally a memory address) that one can
>associate with a widget. This provides for a convenient mapping between
>Widget space and Application space. Thanx in advance.

XView provides this (as did SunView).  Here's a summary of how it works at
the end of this message.  

Regards,

Heather

----------------------------

int INSTANCE;

main(){
	Data data;

	data = (Data)malloc(DataSize);
	...
	INSTANCE = xv_unique_key();
	...
	obj = xv_create(owner, OBJ_TYPE,
		...
		XV_KEY_DATA, INSTANCE, data,
		...
		NULL);
	...
	xv_main_loop(frame);
}

callback_proc(obj, ...) 
	...
	data = (Data) xv_get(obj, XV_KEY_DATA, INSTANCE, NULL);
	...
}