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Manpages XtSetArgSection: XT FUNCTIONS (3Xt)Updated: Release 6.5 Index Return to Main Contents NAMEXtSetArg, XtMergeArgLists - set and merge ArgListsSYNTAXXtSetArg(arg, name, value)Arg arg; String name; XtArgVal value;
ArgList XtMergeArgLists(args1, num_args1, args2,
num_args2)
ARGUMENTS
DESCRIPTIONThe XtSetArg function is usually used in a highly stylized manner to minimize the probability of making a mistake; for example:
Arg args[20]; int n; n = 0; XtSetArg(args[n], XtNheight, 100);n++; XtSetArg(args[n], XtNwidth, 200);n++; XtSetValues(widget, args, n); Alternatively, an application can statically declare the argument list and use XtNumber:
static Args args[] = { {XtNheight, (XtArgVal) 100}, {XtNwidth, (XtArgVal) 200}, }; XtSetValues(Widget, args, XtNumber(args)); Note that you should not use auto-increment or auto-decrement within the first argument to XtSetArg. XtSetArg can be implemented as a macro that dereferences the first argument twice. The XtMergeArgLists function allocates enough storage to hold the combined ArgList structures and copies them into it. Note that it does not check for duplicate entries. When it is no longer needed, free the returned storage by using XtFree. SEE ALSOXtOffset(3Xt)X Toolkit Intrinsics - C Language Interface Xlib - C Language X Interface
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