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 XtSetArg(Xt)      X Version 11 (Release 5) 6 January 1993       XtSetArg(Xt)


 Name

    XtSetArg - set and merge ArgLists

 Syntax


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

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


 Arguments

    arg       Specifies the name-value pair to set.

    args1     Specifies the first ArgList.

    args2     Specifies the second ArgList.

    numargs1 Specifies the number of arguments in the first argument list.

    numargs2 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
              XtArgVal or the address.

 Description

    The 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 com-
    bined 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 also

    XtOffset(Xt)

    X Toolkit Intrinsics - C Language Interface
    Xlib - C Language X Interface