NAME
XtConvert, XtDirectConvert - invoke resource converters
SYNTAX
void
XtConvert(Widget w, String from_type, XrmValuePtr from,
String to_type, XrmValuePtr to_return);
void
XtDirectConvert(XtConverter converter, XrmValuePtr args,
Cardinal num_args, XrmValuePtr from, XrmValuePtr
to_return);
ARGUMENTS
the conversion (often NULL)
- args
- Specifies the argument list that contains the additional
arguments needed to perform .
- converter
- Specifies the conversion procedure that is to be
called.
- from
- Specifies the value to be converted.
- from_type
- Specifies the source type.
- num_args
- Specifies the number of additional arguments (often
zero).
- to_type
- Specifies the destination type.
- to_return
- Returns the converted value.
- w
- Specifies the widget to use for additional arguments (if
any are needed).
DESCRIPTION
The
XtConvert function looks up the type converter registered to convert
from_type to to_type, computes any additional arguments needed, and then calls
XtDirectConvert.
XtConvert has been replaced by
XtConvertAndStore.
The
XtDirectConvert function looks in the converter cache to see if this
conversion procedure has been called with the specified arguments. If so, it
returns a descriptor for information stored in the cache; otherwise, it calls
the converter and enters the result in the cache.
Before calling the specified converter,
XtDirectConvert sets the return
value size to zero and the return value address to NULL. To determine if the
conversion was successful, the client should check to_return.address for
non-NULL.
XtDirectConvert has been replaced by
XtCallConverter.
SEE ALSO
XtAppAddConverter(3), XtStringConversionWarning(3), XtConvertAndStore(3),
XtCallConverter(3)
X Toolkit Intrinsics - C Language Interface
Xlib - C Language X Interface