XtSetArg(3Xt) X Version 11 (Release 6.6) XtSetArg(3Xt)
NAME
XtSetArg, XtMergeArgLists - 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.
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 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},
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XtSetArg(3Xt) X Version 11 (Release 6.6) XtSetArg(3Xt)
};
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 ALSO
XtOffset(3Xt)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface
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