XtSetArg(3Xt)

NAME
XtSetArg, XtMergeArgLists - set and merge ArgLists

SYNTAX

int XtSetArg(Arg arg, String name, XtArgVal value);

ArgList XtMergeArgLists(ArgList args1, Cardinal num_args1, ArgList args2, Cardinal num_args2);

ARGUMENTS

arg Specifies the name-value pair to set.

args1
    Specifies the first

args2
    Specifies the second

num_args1
    Specifies the number of arguments in the first argument list.

num_args2
    Specifies the number of arguments in the second argument list.

name
    Specifies the name of the resource.

value
    Specifies the value of the resource if it will fit in an or the address.

DESCRIPTION
The 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

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 can be implemented as a macro that dereferences the first argument twice.

The function allocates enough storage to hold the combined 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

SEE ALSO
XtOffset(3Xt)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface