





			Xmu Library
		 X Version 11, Release 6.4

		       ``Don't ask.''



Copyright (C) 1989 X Consortium

Permission is hereby granted, free of charge, to any person
obtaining a copy of this software and associated documenta-
tion files (the ``Software''), to deal in the Software with-
out restriction, including without limitation the rights to
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The above copyright notice and this permission notice shall
be included in all copies or substantial portions of the
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X Window System is a trademark of X Consortium, Inc.
























			     -2-


1.  Introduction

The Xmu Library is a collection of miscellaneous (some might
say random) utility functions that have been useful in
building various applications and widgets.  This library is
required by the Athena Widgets.


2.  Atom Functions

The use the functions and macros defined in this section,
you should include the header file <X11/Xmu/Atoms.h>.


XA_ATOM_PAIR(d)
XA_CHARACTER_POSITION(d)
XA_CLASS(d)
XA_CLIENT_WINDOW(d)
XA_CLIPBOARD(d)
XA_COMPOUND_TEXT(d)
XA_DECNET_ADDRESS(d)
XA_DELETE(d)
XA_FILENAME(d)
XA_HOSTNAME(d)
XA_IP_ADDRESS(d)
XA_LENGTH(d)
XA_LIST_LENGTH(d)
XA_NAME(d)
XA_NET_ADDRESS(d)
XA_NULL(d)
XA_OWNER_OS(d)
XA_SPAN(d)
XA_TARGETS(d)
XA_TEXT(d)
XA_TIMESTAMP(d)
XA_USER(d)
XA_UTF8_STRING(d)


These macros take a display as argument and return an Atom.
The name of the atom is obtained from the macro name by
removing the leading characters ``XA_''.  The Atom value is
cached, such that subsequent requests do not cause another
round-trip to the server.


AtomPtr XmuMakeAtom(name)
      char* name;


name	  specifies the atom name

This function creates and initializes an opaque object, an
AtomPtr, for an Atom with the given name.  XmuInternAtom can









			     -3-


be used to cache the Atom value for one or more displays.


char *XmuNameOfAtom(atom_ptr)
      AtomPtr atom_ptr;


atom_ptr  specifies the AtomPtr

The function returns the name of an AtomPtr.


Atom XmuInternAtom(d, atom_ptr)
      Display *d;
      AtomPtr atom_ptr;


d	  specifies the connection to the X server

atom_ptr  specifies the AtomPtr

This function returns the Atom for an AtomPtr.	The Atom is
cached, such that subsequent requests do not cause another
round-trip to the server.


char *XmuGetAtomName(d, atom)
      Display *d;
      Atom atom;


d	  specifies the connection to the X server

atom	  specifies the atom whose name is desired

This function returns the name of an Atom.  The result is
cached, such that subsequent requests do not cause another
round-trip to the server.


void XmuInternStrings(d, names, count, atoms)
      Display *d;
      String *names;
      Cardinal count;
      Atom *atoms;


d	  specifies the connection to the X server

names	  specifies the strings to intern

count	  specifies the number of strings











			     -4-


atoms	  returns the list of Atom values

This function converts a list of atom names into Atom val-
ues.  The results are cached, such that subsequent requests
do not cause further round-trips to the server.  The caller
is responsible for preallocating the array pointed at by
atoms.


3.  Error Handler Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/Error.h>.


int XmuPrintDefaultErrorMessage(dpy, event, fp)
      Display *dpy;
      XErrorEvent *event;
      FILE *fp;


dpy	  specifies the connection to the X server

event	  specifies the error

fp	  specifies where to print the error message

This function prints an error message, equivalent to Xlib's
default error message for protocol errors.  It returns a
non-zero value if the caller should consider exiting, other-
wise it returns 0.  This function can be used when you need
to write your own error handler, but need to print out an
error from within that handler.


int XmuSimpleErrorHandler(dpy, errorp)
      Display *dpy;
      XErrorEvent *errorp;


dpy	  specifies the connection to the X server

errorp	  specifies the error

This function ignores errors for BadWindow errors for
XQueryTree and XGetWindowAttributes, and ignores BadDrawable
errors for XGetGeometry; it returns 0 in those cases.  Oth-
erwise, it prints the default error message, and returns a
non-zero value if the caller should consider exiting, and 0
if the caller should not exit.













			     -5-


4.  System Utility Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/SysUtil.h>.


int XmuGetHostname(buf, maxlen)
      char *buf;
      int maxlen;


buf	  returns the host name

maxlen	  specifies the length of buf

This function stores the null terminated name of the local
host in buf, and returns length of the name.  This function
hides operating system differences, such as whether to call
gethostname or uname.


5.  Window Utility Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/WinUtil.h>.


Screen *XmuScreenOfWindow(dpy, w)
      Display *dpy;
      Window w;


dpy	  specifies the connection to the X server

w	  specifies the window

This function returns the Screen on which the specified win-
dow was created.


Window XmuClientWindow(dpy, win)
      Display *dpy;
      Window win;


dpy	  specifies the connection to the X server

win	  specifies the window

This function finds a window, at or below the specified win-
dow, which has a WM_STATE property.  If such a window is
found, it is returned, otherwise the argument window is
returned.










			     -6-


Bool XmuUpdateMapHints(dpy, w, hints)
      Display *dpy;
      Window w;
      XSizeHints *hints;


dpy	  specifies the connection to the X server

win	  specifies the window

hints	  specifies the new hints, or NULL

This function clears the PPosition and PSize flags and sets
the USPosition and USSize flags in the hints structure, and
then stores the hints for the window using XSetWMNormalHints
and returns True.  If NULL is passed for the hints struc-
ture, then the current hints are read back from the window
using XGetWMNormalHints and are used instead, and True is
returned; otherwise False is returned.


6.  Cursor Utility Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/CurUtil.h>.


int XmuCursorNameToIndex(name)
      char *name;


name	  specifies the name of the cursor

This function takes the name of a standard cursor and
returns its index in the standard cursor font.	The cursor
names are formed by removing the ``XC_'' prefix from the
cursor defines listed in Appendix B of the Xlib manual.


7.  Graphics Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/Drawing.h>.


void XmuDrawRoundedRectangle(dpy, draw, gc, x, y, w, h, ew, eh)
      Display *dpy;
      Drawable draw;
      GC gc;
      int x, y, w, h, ew, eh;


dpy	  specifies the connection to the X server










			     -7-


draw	  specifies the drawable

gc	  specifies the GC

x	  specifies the upper left x coordinate

y	  specifies the upper left y coordinate

w	  specifies the rectangle width

h	  specifies the rectangle height

ew	  specifies the corner width

eh	  specifies the corner height

This function draws a rounded rectangle, where x, y, w, h
are the dimensions of the overall rectangle, and ew and eh
are the sizes of a bounding box that the corners are drawn
inside of; ew should be no more than half of w, and eh
should be no more than half of h.  The current GC line
attributes control all attributes of the line.


void XmuFillRoundedRectangle(dpy, draw, gc, x, y, w, h, ew, eh)
      Display *dpy;
      Drawable draw;
      GC gc;
      int x, y, w, h, ew, eh;


dpy	  specifies the connection to the X server

draw	  specifies the drawable

gc	  specifies the GC

x	  specifies the upper left x coordinate

y	  specifies the upper left y coordinate

w	  specifies the rectangle width

h	  specifies the rectangle height

ew	  specifies the corner width

eh	  specifies the corner height

This function draws a filled rounded rectangle, where x, y,
w, h are the dimensions of the overall rectangle, and ew and
eh are the sizes of a bounding box that the corners are
drawn inside of; ew should be no more than half of w, and eh
should be no more than half of h.  The current GC fill









			     -8-


settings control all attributes of the fill contents.


XmuDrawLogo(dpy, drawable, gcFore, gcBack, x, y, width, height)
      Display *dpy;
      Drawable drawable;
      GC gcFore, gcBack;
      int x, y;
      unsigned int width, height;


dpy	  specifies the connection to the X server

drawable  specifies the drawable

gcFore	  specifies the foreground GC

gcBack	  specifies the background GC

x	  specifies the upper left x coordinate

y	  specifies the upper left y coordinate

width	  specifies the logo width

height	  specifies the logo height

This function draws the ``official'' X Window System logo.
The bounding box of the logo in the drawable is given by x,
y, width, and height.  The logo itself is filled using
gcFore, and the rest of the rectangle is filled using
gcBack.


Pixmap XmuCreateStippledPixmap(screen, fore, back, depth)
      Screen *screen;
      Pixel fore, back;
      unsigned int depth;


screen	  specifies the screen the pixmap is created on

fore	  specifies the foreground pixel value

back	  specifies the background pixel value

depth	  specifies the depth of the pixmap

This function creates a two pixel by one pixel stippled
pixmap of specified depth on the specified screen.  The
pixmap is cached so that multiple requests share the same
pixmap.  The pixmap should be freed with XmuReleaseStippled-
Pixmap to maintain correct reference counts.










			     -9-


void XmuReleaseStippledPixmap(screen, pixmap)
      Screen *screen;
      Pixmap pixmap;


screen	  specifies the screen the pixmap was created on

pixmap	  specifies the pixmap to free

This function frees a pixmap created with XmuCreateStippled-
Pixmap.


int XmuReadBitmapData(fstream, width, height, datap, x_hot, y_hot)
    FILE *fstream;
    unsigned int *width, *height;
    unsigned char **datap;
    int *x_hot, *y_hot;


stream	  specifies the stream to read from

width	  returns the width of the bitmap

height	  returns the height of the bitmap

datap	  returns the parsed bitmap data

x_hot	  returns the x coordinate of the hotspot

y_hot	  returns the y coordinate of the hotspot

This function reads a standard bitmap file description from
the specified stream, and returns the parsed data in a for-
mat suitable for passing to XCreateBitmapFromData.  The
return value of the function has the same interpretation as
the return value for XReadBitmapFile.


int XmuReadBitmapDataFromFile(filename, width, height, datap, x_hot, y_hot)
    char *filename;
    unsigned int *width, *height;
    unsigned char **datap;
    int *x_hot, *y_hot;


filename  specifies the file to read from

width	  returns the width of the bitmap

height	  returns the height of the bitmap

datap	  returns the parsed bitmap data










			    -10-


x_hot	  returns the x coordinate of the hotspot

y_hot	  returns the y coordinate of the hotspot

This function reads a standard bitmap file description from
the specified file, and returns the parsed data in a format
suitable for passing to XCreateBitmapFromData.	The return
value of the function has the same interpretation as the
return value for XReadBitmapFile.


Pixmap XmuLocateBitmapFile(screen, name, srcname, srcnamelen, widthp, heightp, xhotp, yhotp)
    Screen *screen;
    char *name;
    char *srcname;
    int srcnamelen;
    int *widthp, *heightp, *xhotp, *yhotp;


screen	  specifies the screen the pixmap is created on

name	  specifies the file to read from

srcname   returns the full filename of the bitmap

srcnamelen
	  specifies the length of the srcname buffer

width	  returns the width of the bitmap

height	  returns the height of the bitmap

xhotp	  returns the x coordinate of the hotspot

yhotp	  returns the y coordinate of the hotspot

This function reads a file in standard bitmap file format,
using XReadBitmapFile, and returns the created bitmap.	The
filename may be absolute, or relative to the global resource
named bitmapFilePath with class BitmapFilePath.  If the
resource is not defined, the default value is the build sym-
bol BITMAPDIR, which is typically "/usr/include/X11/bit-
maps".	If srcnamelen is greater than zero and srcname is
not NULL, the null terminated filename will be copied into
srcname.  The size and hotspot of the bitmap are also
returned.

















			    -11-


Pixmap XmuCreatePixmapFromBitmap(dpy, d, bitmap, width, height, depth, fore, back)
    Display *dpy;
    Drawable d;
    Pixmap bitmap;
    unsigned int width, height;
    unsigned int depth;
    unsigned long fore, back;


dpy	  specifies the connection to the X server

d	  specifies the screen the pixmap is created on

bitmap	  specifies the bitmap source

width	  specifies the width of the pixmap

height	  specifies the height of the pixmap

depth	  specifies the depth of the pixmap

fore	  specifies the foreground pixel value

back	  specifies the background pixel value

This function creates a pixmap of the specified width,
height, and depth, on the same screen as the specified draw-
able, and then performs an XCopyPlane from the specified
bitmap to the pixmap, using the specified foreground and
background pixel values.  The created pixmap is returned.


8.  Selection Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/StdSel.h>.


Boolean XmuConvertStandardSelection(w, time, selection, target, type, value, length, format)
      Widget w;
      Time time;
      Atom *selection, *target, *type;
      caddr_t *value;
      unsigned long *length;
      int *format;


w	  specifies the widget which currently owns the
	  selection

time	  specifies the time at which the selection was
	  established











			    -12-


selection this argument is ignored

target	  specifies the target type of the selection

type	  returns the property type of the converted value

value	  returns the converted value

length	  returns the number of elements in the converted
	  value

format	  returns the size in bits of the elements

This function converts the following standard selections:
CLASS, CLIENT_WINDOW, DECNET_ADDRESS, HOSTNAME, IP_ADDRESS,
NAME, OWNER_OS, TARGETS, TIMESTAMP, and USER.  It returns
True if the conversion was successful, else it returns
False.


9.  Type Converter Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/Converters.h>.


void XmuCvtFunctionToCallback(args, num_args, fromVal, toVal)
      XrmValue *args;
      Cardinal *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;


args	  this argument is ignored

num_args  this argument is ignored

fromVal   the function to convert

toVal	  the place to store the converted value

This function converts a callback procedure to a callback
list containing that procedure, with NULL closure data.  To
use this converter, include the following in your widget's
ClassInitialize procedure:

XtAddConverter(XtRCallProc, XtRCallback, XmuCvtFunctionTo-
Callback, NULL, 0);















			    -13-


void XmuCvtStringToBackingStore(args, num_args, fromVal, toVal)
      XrmValue *args;
      Cardinal *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;


args	  this argument is ignored

num_args  this argument must be a pointer to a Cardinal con-
	  taining the value 0

fromVal   specifies the string to convert

toVal	  returns the converted value

This function converts a string to a backing-store integer
as defined in <X11/X.h>.  The string "notUseful" converts to
NotUseful, "whenMapped" converts to WhenMapped, and "always"
converts to Always.  The string "default" converts to the
value Always+ WhenMapped+ NotUseful.  The case of the string
does not matter.  To use this converter, include the follow-
ing in your widget's ClassInitialize procedure:

XtAddConverter(XtRString, XtRBackingStore, XmuCvtStringTo-
BackingStore, NULL, 0);


void XmuCvtStringToBitmap(args, num_args, fromVal, toVal)
      XrmValuePtr args;
      Cardinal *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;


args	  the sole argument specifies the Screen on which to
	  create the bitmap

num_args  must be the value 1

fromVal   specifies the string to convert

toVal	  returns the converted value

This function creates a bitmap (a Pixmap of depth one) suit-
able for window manager icons.	The string argument is the
name of a file in standard bitmap file format.	For the pos-
sible filename specifications, see XmuLocateBitmapFile.  To
use this converter, include the following in your widget's
ClassInitialize procedure:

static XtConvertArgRec screenConvertArg[] = {
  {XtBaseOffset, (XtPointer)XtOffset(Widget, core.screen),
sizeof(Screen *)}









			    -14-


};

XtAddConverter(XtRString, XtRBitmap, XmuCvtStringToBitmap,
	   screenConvertArg, XtNumber(screenConvertArg));


Boolean XmuCvtStringToColorCursor(dpy, args, num_args, fromVal, toVal, data)
      Display * dpy;
      XrmValuePtr args;
      Cardinal *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;
      XtPointer * data;


dpy	  specifies the display to use for conversion warn-
	  ings

args	  specifies the required conversion arguments

num_args  specifies the number of required conversion argu-
	  ments, which is 4

fromVal   specifies the string to convert

toVal	  returns the converted value

data	  this argument is ignored

This function converts a string to a Cursor with the fore-
ground and background pixels specified by the conversion
arguments.  The string can either be a standard cursor name
formed by removing the ``XC_'' prefix from any of the cursor
defines listed in Appendix B of the Xlib Manual, a font name
and glyph index in decimal of the form "FONT fontname index
[[font] index]", or a bitmap filename acceptable to XmuLo-
cateBitmapFile.  To use this converter, include the follow-
ing in the widget ClassInitialize procedure:

static XtConvertArgRec colorCursorConvertArgs[] = {
  {XtWidgetBaseOffset, (XtPointer) XtOffsetOf(WidgetRec,
core.screen),
   sizeof(Screen *)},
  {XtResourceString, (XtPointer) XtNpointerColor,
sizeof(Pixel)},
  {XtResourceString, (XtPointer) XtNpointerColorBackground,
sizeof(Pixel)},
  {XtWidgetBaseOffset, (XtPointer) XtOffsetOf(WidgetRec,
core.colormap),
   sizeof(Colormap)}
};

XtSetTypeConverter(XtRString, XtRColorCursor, XmuCvtString-
ToColorCursor,









			    -15-


	   colorCursorConvertArgs, XtNumber(colorCursorCon-
vertArgs),
		 XtCacheByDisplay, NULL); The widget must
recognize XtNpointerColor and XtNpointerColorBackground as
resources, or specify other appropriate foreground and back-
ground resources.  The widget's Realize and SetValues meth-
ods must cause the converter to be invoked with the appro-
priate arguments when one of the foreground, background, or
cursor resources has changed, or when the window is created,
and must assign the cursor to the window of the widget.


void XmuCvtStringToCursor(args, num_args, fromVal, toVal)
      XrmValuePtr args;
      Cardinal *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;


args	  specifies the required conversion argument, the
	  screen

num_args  specifies the number of required conversion argu-
	  ments, which is 1

fromVal   specifies the string to convert

toVal	  returns the converted value

This function converts a string to a Cursor.  The string can
either be a standard cursor name formed by removing the
``XC_'' prefix from any of the cursor defines listed in Ap-
pendix B of the Xlib Manual, a font name and glyph index in
decimal of the form "FONT fontname index [[font] index]", or
a bitmap filename acceptable to XmuLocateBitmapFile.  To use
this converter, include the following in your widget's
ClassInitialize procedure:

static XtConvertArgRec screenConvertArg[] = {
  {XtBaseOffset, (XtPointer)XtOffsetOf(WidgetRec,
core.screen), sizeof(Screen *)}
};

XtAddConverter(XtRString, XtRCursor, XmuCvtStringToCursor,
	   screenConvertArg, XtNumber(screenConvertArg));


void XmuCvtStringToGravity(args, num_args, fromVal, toVal)
     XrmValuePtr *args;
      Cardinal *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;











			    -16-


args	  this argument is ignored

num_args  this argument must be a pointer to a Cardinal con-
	  taining the value 0

fromVal   specifies the string to convert

toVal	  returns the converted value

This function converts a string to an XtGravity enumeration
value.	The string "forget" and a NULL value convert to For-
getGravity, "NorthWestGravity" converts to NorthWestGravity,
the strings "NorthGravity" and "top" convert to NorthGrav-
ity, "NorthEastGravity" converts to NorthEastGravity, the
strings "West" and "left" convert to WestGravity, "Center-
Gravity" converts to CenterGravity, "EastGravity" and
"right" convert to EastGravity, "SouthWestGravity" converts
to SouthWestGravity, "SouthGravity" and "bottom" convert to
SouthGravity, "SouthEastGravity" converts to SouthEastGrav-
ity, "StaticGravity" converts to StaticGravity, and "Unmap-
Gravity" converts to UnmapGravity.  The case of the string
does not matter.  To use this converter, include the follow-
ing in your widget's class initialize procedure:

XtAddConverter(XtRString, XtRGravity, XmuCvtStringToGravity,
NULL, 0);


void XmuCvtStringToJustify(args, num_args, fromVal, toVal)
      XrmValuePtr *args;
      Cardinal *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;


args	  this argument is ignored

num_args  this argument is ignored

fromVal   specifies the string to convert

toVal	  returns the converted value

This function converts a string to an XtJustify enumeration
value.	The string "left" converts to XtJustifyLeft, "cen-
ter" converts to XtJustifyCenter, and "right" converts to
XtJustifyRight.  The case of the string does not matter.  To
use this converter, include the following in your widget's
ClassInitialize procedure:

XtAddConverter(XtRString, XtRJustify, XmuCvtStringToJustify,
NULL, 0);











			    -17-


void XmuCvtStringToLong(args, num_args, fromVal, toVal)
      XrmValuePtr args;
      Cardinal	  *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;


args	  this argument is ignored

num_args  this argument must be a pointer to a Cardinal con-
	  taining 0

fromVal   specifies the string to convert

toVal	  returns the converted value

This function converts a string to an integer of type long.
It parses the string using sscanf with a format of "%ld".
To use this converter, include the following in your wid-
get's ClassInitialize procedure:

XtAddConverter(XtRString, XtRLong, XmuCvtStringToLong, NULL,
0);


void XmuCvtStringToOrientation(args, num_args, fromVal, toVal)
      XrmValuePtr *args;
      Cardinal *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;


args	  this argument is ignored

num_args  this argument is ignored

fromVal   specifies the string to convert

toVal	  returns the converted value

This function converts a string to an XtOrientation enumera-
tion value.  The string "horizontal" converts to XtorientHo-
rizontal and "vertical" converts to XtorientVertical.  The
case of the string does not matter.  To use this converter,
include the following in your widget's ClassInitialize pro-
cedure:

XtAddConverter(XtRString, XtROrientation, XmuCvtStringToOri-
entation, NULL, 0);














			    -18-


Boolean XmuCvtStringToShapeStyle(dpy, args, num_args, from, toVal, data)
      Display *dpy;
      XrmValue *args;
      Cardinal *num_args;
      XrmValue *from;
      XrmValue *toVal;
      XtPointer *data;


dpy	  the display to use for conversion warnings

args	  this argument is ignored

num_args  this argument is ignored

fromVal   the value to convert from

toVal	  the place to store the converted value

data	  this argument is ignored

This function converts a string to an integer shape style.
The string "rectangle" converts to XmuShapeRectangle, "oval"
converts to XmuShapeOval, "ellipse" converts to XmuShapeEl-
lipse, and "roundedRectangle" converts to XmuShapeRounde-
dRectangle.  The case of the string does not matter.  To use
this converter, include the following in your widget's
ClassInitialize procedure:

XtSetTypeConverter(XtRString, XtRShapeStyle, XmuCvtString-
ToShapeStyle,
	       NULL, 0, XtCacheNone, NULL);


Boolean XmuReshapeWidget(w, shape_style, corner_width, corner_height)
      Widget w;
      int shape_style;
      int corner_width, corner_height;


w	  specifies the widget to reshape

shape_style
	  specifies the new shape

corner_width
	  specifies the width of the rounded rectangle cor-
	  ner

corner_height
	  specified the height of the rounded rectangle cor-
	  ner











			    -19-


This function reshapes the specified widget, using the Shape
extension, to a rectangle, oval, ellipse, or rounded rectan-
gle, as specified by shape_style ( XmuShapeRectangle,
XmuShapeOval, XmuShapeEllipse, and XmuShapeRoundedRectangle,
respectively).	The shape is bounded by the outside edges of
the rectangular extents of the widget.	If the shape is a
rounded rectangle, corner_width and corner_height specify
the size of the bounding box that the corners are drawn
inside of (see XmuFillRoundedRectangle); otherwise, cor-
ner_width and corner_height are ignored.  The origin of the
widget within its parent remains unchanged.


void XmuCvtStringToWidget(args, num_args, fromVal, toVal)
      XrmValuePtr args;
      Cardinal *num_args;
      XrmValuePtr fromVal;
      XrmValuePtr toVal;


args	  this sole argument is the parent Widget

num_args  this argument must be 1

fromVal   specifies the string to convert

toVal	  returns the converted value

This function converts a string to an immediate child widget
of the parent widget passed as an argument.  Note that this
converter only works for child widgets that have already
been created; there is no lazy evaluation.  The string is
first compared against the names of the normal and popup
children, and if a match is found the corresponding child is
returned.  If no match is found, the string is compared
against the classes of the normal and popup children, and if
a match is found the corresponding child is returned.  The
case of the string is significant.  To use this converter,
include the following in your widget's ClassInitialize pro-
cedure:

static XtConvertArgRec parentCvtArg[] = {
  {XtBaseOffset, (XtPointer)XtOffset(Widget, core.parent),
sizeof(Widget)},
};

XtAddConverter(XtRString, XtRWidget, XmuCvtStringToWidget,
	   parentCvtArg, XtNumber(parentCvtArg));















			    -20-


Boolean XmuNewCvtStringToWidget(dpy, args, num_args, fromVal, toVal, data)
      Display *dpy;
      XrmValue * args;
      Cardinal *num_args;
      XrmValue * fromVal;
      XrmValue * toVal;
      XtPointer *data;


dpy	  the display to use for conversion warnings

args	  this sole argument is the parent Widget

num_args  this argument must be a pointer to a Cardinal con-
	  taining the value 1

fromVal   specifies the string to convert

toVal	  returns the converted value

data	  this argument is ignored

This converter is identical in functionality to XmuCvt-
StringToWidget, except that it is a new-style converter,
allowing the specification of a cache type at the time of
registration.  Most widgets will not cache the conversion
results, as the application may dynamically create and
destroy widgets, which would cause cached values to become
illegal.  To use this converter, include the following in
the widget's class initialize procedure:

static XtConvertArgRec parentCvtArg[] = {
  {XtWidgetBaseOffset, (XtPointer)XtOffsetOf(WidgetRec,
core.parent),
   sizeof(Widget)}
};

XtSetTypeConverter(XtRString, XtRWidget, XmuNewCvtString-
ToWidget,
	     parentCvtArg, XtNumber(parentCvtArg),
XtCacheNone, NULL);


10.  Character Set Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/CharSet.h>.

The functions in this section are deprecated because they
don't work in most locales now supported by X11; the func-
tion XmbLookupString provides a better alternative.












			    -21-


void XmuCopyISOLatin1Lowered(dst, src)
      char *dst, *src;


dst	  returns the string copy

src	  specifies the string to copy

This function copies a null terminated string from src to
dst (including the null), changing all Latin-1 uppercase
letters to lowercase.  The string is assumed to be encoded
using ISO 8859-1.


void XmuCopyISOLatin1Uppered(dst, src)
      char *dst, *src;


dst	  returns the string copy

src	  specifies the string to copy

This function copies a null terminated string from src to
dst (including the null), changing all Latin-1 lowercase
letters to uppercase.  The string is assumed to be encoded
using ISO 8859-1.


int XmuCompareISOLatin1(first, second)
      char *first, *second;


dst	  specifies a string to compare

src	  specifies a string to compare

This function compares two null terminated Latin-1 strings,
ignoring case differences, and returns an integer greater
than, equal to, or less than 0, according to whether first
is lexicographically greater than, equal to, or less than
second.  The two strings are assumed to be encoded using ISO
8859-1.


int XmuLookupLatin1(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event










			    -22-


buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state

This function is identical to XLookupString, and exists only
for naming symmetry with other functions.


int XmuLookupLatin2(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state

This function is similar to XLookupString, except that it
maps a key event to an Latin-2 (ISO 8859-2) string, or to an
ASCII control string.


int XmuLookupLatin3(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state











			    -23-


This function is similar to XLookupString, except that it
maps a key event to an Latin-3 (ISO 8859-3) string, or to an
ASCII control string.


int XmuLookupLatin4(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state

This function is similar to XLookupString, except that it
maps a key event to an Latin-4 (ISO 8859-4) string, or to an
ASCII control string.


int XmuLookupKana(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state

This function is similar to XLookupString, except that it
maps a key event to a string in an encoding consisting of
Latin-1 (ISO 8859-1) and ASCII control in the Graphics Left
half (values 0 to 127), and Katakana in the Graphics Right
half (values 128 to 255), using the values from JIS
X201-1976.











			    -24-


int XmuLookupJISX0201(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state

This function is similar to XLookupString, except that it
maps a key event to a string in the JIS X0201-1976 encoding,
including ASCII control.


int XmuLookupArabic(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state

This function is similar to XLookupString, except that it
maps a key event to a Latin/Arabic (ISO 8859-6) string, or
to an ASCII control string.


int XmuLookupCyrillic(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;











			    -25-


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state

This function is similar to XLookupString, except that it
maps a key event to a Latin/Cyrillic (ISO 8859-5) string, or
to an ASCII control string.


int XmuLookupGreek(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state

This function is similar to XLookupString, except that it
maps a key event to a Latin/Greek (ISO 8859-7) string, or to
an ASCII control string.


int XmuLookupHebrew(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None










			    -26-


status	  specifies or returns the compose state

This function is similar to XLookupString, except that it
maps a key event to a Latin/Hebrew (ISO 8859-8) string, or
to an ASCII control string.


int XmuLookupAPL(event, buffer, nbytes, keysym, status)
      XKeyEvent *event;
      char *buffer;
      int nbytes;
      KeySym *keysym;
      XComposeStatus *status;


event	  specifies the key event

buffer	  returns the translated characters

nbytes	  specifies the length of the buffer

keysym	  returns the computed KeySym, or None

status	  specifies or returns the compose state

This function is similar to XLookupString, except that it
maps a key event to an APL string.


11.  Compound Text Functions

The functions defined in this section are for parsing Com-
pound Text strings, decomposing them into individual seg-
ments. Definitions needed to use these routines are in the
include file <X11/Xmu/Xct.h>.

The functions in this section are deprecated because they
shift the burden for recently introduced locale encodings to
the application. The use of the UTF8_STRING text encoding
provides a better alternative.

A Compound Text string is represented as the following type:

     typedef unsigned char *XctString;


XctData XctCreate(string, length, flags)
      XctString string;
      int length;
      XctFlags flags;


string	  the Compound Text string










			    -27-


length	  the number of bytes in string

flags	  parsing control flags

This function creates an XctData structure for parsing a
Compound Text string.  The string need not be null termi-
nated.	The following flags are defined to control parsing
of the string:

XctSingleSetSegments -- This means that returned segments
should contain characters from only one set (C0, C1, GL,
GR).  When this is requested, XctSegment is never returned
by XctNextItem, instead XctC0Segment, XctC1Segment, Xct-
GlSegment, and XctGRSegment are returned.  C0 and C1 seg-
ments are always returned as singleton characters.

XctProvideExtensions -- This means that if the Compound Text
string is from a higher version than this code is imple-
mented to, then syntactically correct but unknown control
sequences should be returned as XctExtension items by Xct-
NextItem.  If this flag is not set, and the Compound Text
string version indicates that extensions cannot be ignored,
then each unknown control sequence will be reported as an
XctError.

XctAcceptC0Extensions -- This means that if the Compound
Text string is from a higher version than this code is
implemented to, then unknown C0 characters should be treated
as if they were legal, and returned as C0 characters
(regardless of how XctProvideExtensions is set) by XctNex-
tItem.	If this flag is not set, then all unknown C0 charac-
ters are treated according to XctProvideExtensions.

XctAcceptC1Extensions -- This means that if the Compound
Text string is from a higher version than this code is
implemented to, then unknown C1 characters should be treated
as if they were legal, and returned as C1 characters
(regardless of how XctProvideExtensions is set) by XctNex-
tItem.	If this flag is not set, then all unknown C1 charac-
ters are treated according to XctProvideExtensions.

XctHideDirection -- This means that horizontal direction
changes should be reported as XctHorizontal items by XctNex-
tItem.	then direction changes are not returned as items,
but the current direction is still maintained and reported
for other items.  The current direction is given as an enu-
meration, with the values XctUnspecified, XctLeftToRight,
and XctRightToLeft.

XctFreeString -- This means that XctFree should free the
Compound Text string that is passed to XctCreate.  If this
flag is not set, the string is not freed.











			    -28-


XctShiftMultiGRToGL -- This means that XctNextItem should
translate GR segments on-the-fly into GL segments for the GR
sets: GB2312.1980-1, JISX0208.1983-1, and KSC5601.1987-1.


void XctReset(data)
      XctData data;


data	  specifies the Compound Text structure

This function resets the XctData structure to reparse the
Compound Text string from the beginning.


XctResult XctNextItem(data)
      XctData data;


data	  specifies the Compound Text structure

This function parses the next ``item'' from the Compound
Text string.  The return value indicates what kind of item
is returned.  The item itself, it's length, and the current
contextual state, are reported as components of the XctData
structure.  XctResult is an enumeration, with the following
values:

XctSegment -- the item contains some mixture of C0, GL, GR,
and C1 characters.

XctC0Segment -- the item contains only C0 characters.

XctGLSegment -- the item contains only GL characters.

XctC1Segment -- the item contains only C1 characters.

XctGRSegment -- the item contains only GR characters.

XctExtendedSegment -- the item contains an extended segment.

XctExtension -- the item is an unknown extension control
sequence.

XctHorizontal -- the item indicates a change in horizontal
direction or depth.  The new direction and depth are
recorded in the XctData structure.

XctEndOfText -- The end of the Compound Text string has been
reached.

XctError -- the string contains a syntactic or semantic
error; no further parsing should be performed.










			    -29-


The following state values are stored in the XctData struc-
ture:

     XctString item;	      /* the action item */
     int item_length;	      /* the length of item in bytes */
     int char_size;	      /* the number of bytes per character in
			       * item, with zero meaning variable */
     char *encoding;	      /* the XLFD encoding name for item */
     XctHDirection horizontal;/* the direction of item */
     int horz_depth;	      /* the current direction nesting depth */
     char *GL;		      /* the "{I} F" string for the current GL */
     char *GL_encoding;       /* the XLFD encoding name for the current GL */
     int GL_set_size;	      /* 94 or 96 */
     int GL_char_size;	      /* the number of bytes per GL character */
     char *GR;		      /* the "{I} F" string for the current GR */
     char *GR_encoding;       /* the XLFD encoding name the for current GR */
     int GR_set_size;	      /* 94 or 96 */
     int GR_char_size;	      /* the number of bytes per GR character */
     char *GLGR_encoding;     /* the XLFD encoding name for the current
			       * GL+GR, if known */



void XctFree(data)
      XctData data;


data	  specifies the Compound Text structure

This function frees all data associated with the XctData
structure.


12.  CloseDisplay Hook Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/CloseHook.h>.


CloseHook XmuAddCloseDisplayHook(dpy, func, arg)
      Display *dpy;
      int (*func)();
      caddr_t arg;


dpy	  specifies the connection to the X server

func	  specifies the function to call at display close

arg	  specifies arbitrary data to pass to func

This function adds a callback for the given display.  When
the display is closed, the given function will be called
with the given display and argument as:









			    -30-


     (*func)(dpy, arg)

The function is declared to return an int even though the
value is ignored, because some compilers have problems with
functions returning void.

This routine returns NULL if it was unable to add the call-
back, otherwise it returns an opaque handle that can be used
to remove or lookup the callback.


Bool XmuRemoveCloseDisplayHook(dpy, handle, func, arg)
      Display *dpy;
      CloseHook handle;
      int (*func)();
      caddr_t arg;


dpy	  specifies the connection to the X server

handle	  specifies the callback by id, or NULL

func	  specifies the callback by function

arg	  specifies the function data to match

This function deletes a callback that has been added with
XmuAddCloseDisplayHook.  If handle is not NULL, it specifies
the callback to remove, and the func and arg parameters are
ignored.  If handle is NULL, the first callback found to
match the specified func and arg will be removed.  Returns
True if a callback was removed, else returns False.


Bool XmuLookupCloseDisplayHook(dpy, handle, func, arg)
      Display *dpy;
      CloseHook handle;
      int (*func)();
      caddr_t arg;


dpy	  specifies the connection to the X server

handle	  specifies the callback by id, or NULL

func	  specifies the callback by function

arg	  specifies the function data to match

This function determines if a callback is installed.  If
handle is not NULL, it specifies the callback to look for,
and the func and arg parameters are ignored.  If handle is
NULL, the function will look for any callback for the speci-
fied func and arg.  Returns True if a matching callback









			    -31-


exists, else returns False.


13.  Display Queue Functions

To use the functions and types defined in this section, you
should include the header file <X11/Xmu/DisplayQue.h>.	It
defines the following types:


typedef struct _XmuDisplayQueueEntry {
     struct _XmuDisplayQueueEntry *prev, *next;
     Display *display;
     CloseHook closehook;
     caddr_t data;
} XmuDisplayQueueEntry;

typedef struct _XmuDisplayQueue {
     int nentries;
     XmuDisplayQueueEntry *head, *tail;
     int (*closefunc)();
     int (*freefunc)();
     caddr_t data;
} XmuDisplayQueue;



XmuDisplayQueue *XmuDQCreate(closefunc, freefunc, data)
      int (*closefunc)();
      int (*freefunc)();
      caddr_t data;


closefunc specifies the close function

freefunc  specifies the free function

data	  specifies private data for the functions

This function creates and returns an empty XmuDisplayQueue
(which is really just a set of displays, but is called a
queue for historical reasons).	The queue is initially
empty, but displays can be added using XmuAddDisplay.  The
data value is simply stored in the queue for use by the
closefunc and freefunc callbacks.  Whenever a display in the
queue is closed using XCloseDisplay, the closefunc (if non-
NULL) is called with the queue and the display's XmuDis-
playQueueEntry as follows:

     (*closefunc)(queue, entry)

The freeproc (if non-NULL) is called whenever the last dis-
play in the queue is closed, as follows:










			    -32-


     (*freefunc)(queue)

The application is responsible for actually freeing the
queue, by calling XmuDQDestroy.


XmuDisplayQueueEntry *XmuDQAddDisplay(q, dpy, data)
      XmuDisplayQueue *q;
      Display *dpy;
      caddr_t data;


q	  specifies the queue

dpy	  specifies the display to add

data	  specifies private data for the free function

This function adds the specified display to the queue.	If
successful, the queue entry is returned, otherwise NULL is
returned.  The data value is simply stored in the queue
entry for use by the queue's freefunc callback.  This func-
tion does not attempt to prevent duplicate entries in the
queue; the caller should use XmuDQLookupDisplay to determine
if a display has already been added to a queue.


XmuDisplayQueueEntry *XmuDQLookupDisplay(q, dpy)
      XmuDisplayQueue *q;
      Display *dpy;


q	  specifies the queue

dpy	  specifies the display to lookup

This function returns the queue entry for the specified dis-
play, or NULL if the display is not in the queue.


XmuDQNDisplays(q)


This macro returns the number of displays in the specified
queue.


Bool XmuDQRemoveDisplay(q, dpy)
      XmuDisplayQueue *q;
      Display *dpy;


q	  specifies the queue










			    -33-


dpy	  specifies the display to remove

This function removes the specified display from the speci-
fied queue.  No callbacks are performed.  If the display is
not found in the queue, False is returned, otherwise True is
returned.


Bool XmuDQDestroy(q, docallbacks)
      XmuDisplayQueue *q;
      Bool docallbacks;


q	  specifies the queue to destroy

docallbacks
	  specifies whether close functions should be called

This function releases all memory associated with the speci-
fied queue.  If docallbacks is True, then the queue's close-
func callback (if non-NULL) is first called for each display
in the queue, even though XCloseDisplay is not called on the
display.


14.  Toolkit Convenience Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/Initer.h>.


void XmuAddInitializer(func, data)
      void (*func)();
      caddr_t data;


func	  specifies the procedure to register

data	  specifies private data for the procedure

This function registers a procedure, to be invoked the first
time XmuCallInitializers is called on a given application
context.  The procedure is called with the application con-
text and the specified data:

     (*func)(app_con, data)


void XmuCallInitializers(app_con)
      XtAppContext app_con;


app_con   specifies the application context to initialize










			    -34-


This function calls each of the procedures that have been
registered with XmuAddInitializer, if this is the first time
the application context has been passed to XmuCallInitializ-
ers.  Otherwise, this function does nothing.


15.  Standard Colormap Functions

To use the functions defined in this section, you should
include the header file <X11/Xmu/StdCmap.h>.


Status XmuAllStandardColormaps(dpy)
      Display *dpy;


dpy	  specifies the connection to the X server

To create all of the appropriate standard colormaps for
every visual of every screen on a given display, use XmuAll-
StandardColormaps.

This function defines and retains as permanent resources all
standard colormaps which are meaningful for the visuals of
each screen of the display.  It returns 0 on failure, non-
zero on success.  If the property of any standard colormap
is already defined, this function will redefine it.

This function is intended to be used by window managers or a
special client at the start of a session.

The standard colormaps of a screen are defined by properties
associated with the screen's root window.  The property
names of standard colormaps are predefined, and each prop-
erty name except RGB_DEFAULT_MAP may describe at most one
colormap.

The standard colormaps are: RGB_BEST_MAP, RGB_RED_MAP,
RGB_GREEN_MAP, RGB_BLUE_MAP, RGB_DEFAULT_MAP, and
RGB_GRAY_MAP.  Therefore a screen may have at most 6 stan-
dard colormap properties defined.

A standard colormap is associated with a particular visual
of the screen.	A screen may have multiple visuals defined,
including visuals of the same class at different depths.
Note that a visual id might be repeated for more than one
depth, so the visual id and the depth of a visual identify
the visual.  The characteristics of the visual will deter-
mine which standard colormaps are meaningful under that
visual, and will determine how the standard colormap is
defined.  Because a standard colormap is associated with a
specific visual, there must be a method of determining which
visuals take precedence in defining standard colormaps.










			    -35-


The method used here is: for the visual of greatest depth,
define all standard colormaps meaningful to that visual
class, according to this order of (descending) precedence:
DirectColor; PseudoColor; TrueColor and GrayScale; and
finally StaticColor and StaticGray.

This function allows success, on a per screen basis.  For
example, if a map on screen 1 fails, the maps on screen 0,
created earlier, will remain.  However, none on screen 1
will remain.  If a map on screen 0 fails, none will remain.

See XmuVisualStandardColormaps for which standard colormaps
are meaningful under these classes of visuals.


Status XmuVisualStandardColormaps(dpy, screen, visualid, depth, replace, retain)
      Display *dpy;
      int screen;
      VisualID visualid;
      unsigned int depth;
      Bool replace;
      Bool retain;


dpy	  specifies the connection to the X server

screen	  specifies the screen of the display

visualid  specifies the visual type

depth	  specifies the visual depth

replace   specifies whether or not to replace

retain	  specifies whether or not to retain

To create all of the appropriate standard colormaps for a
given visual on a given screen, use XmuVisualStandardCol-
ormaps.

This function defines all appropriate standard colormap
properties for the given visual.  If replace is True, any
previous definition will be removed.  If retain is True, new
properties will be retained for the duration of the server
session.  This function returns 0 on failure, non-zero on
success.  On failure, no new properties will be defined, but
old ones may have been removed if replace was True.

Not all standard colormaps are meaningful to all visual
classes.  This routine will check and define the following
properties for the following classes, provided that the size
of the colormap is not too small.  For DirectColor and Pseu-
doColor: RGB_DEFAULT_MAP, RGB_BEST_MAP, RGB_RED_MAP,
RGB_GREEN_MAP, RGB_BLUE_MAP, and RGB_GRAY_MAP.	For









			    -36-


TrueColor and StaticColor: RGB_BEST_MAP.  For GrayScale and
StaticGray: RGB_GRAY_MAP.


Status XmuLookupStandardColormap(dpy, screen, visualid, depth, property, replace, retain)
      Display *dpy;
      int screen;
      VisualID visualid;
      unsigned int depth;
      Atom property;
      Bool replace;
      Bool retain;


dpy	  specifies the connection to the X server

screen	  specifies the screen of the display

visualid  specifies the visual type

depth	  specifies the visual depth

property  specifies the standard colormap property

replace   specifies whether or not to replace

retain	  specifies whether or not to retain

To create a standard colormap if one does not currently
exist, or replace the currently existing standard colormap,
use XmuLookupStandardColormap.

Given a screen, a visual, and a property, this function will
determine the best allocation for the property under the
specified visual, and determine the whether to create a new
colormap or to use the default colormap of the screen.

If replace is True, any previous definition of the property
will be replaced.  If retain is True, the property and the
colormap will be made permanent for the duration of the
server session.  However, pre-existing property definitions
which are not replaced cannot be made permanent by a call to
this function; a request to retain resources pertains to
newly created resources.

This function returns 0 on failure, non-zero on success.  A
request to create a standard colormap upon a visual which
cannot support such a map is considered a failure.  An exam-
ple of this would be requesting any standard colormap prop-
erty on a monochrome visual, or, requesting an RGB_BEST_MAP
on a display whose colormap size is 16.












			    -37-


Status XmuGetColormapAllocation(vinfo, property, red_max, green_max, blue_max)
      XVisualInfo *vinfo;
      Atom property;
      unsigned long *red_max, *green_max, *blue_max;


vinfo	  specifies visual information for a chosen visual

property  specifies one of the standard colormap property
	  names

red_max   returns maximum red value

green_max returns maximum green value

blue_max  returns maximum blue value

To determine the best allocation of reds, greens, and blues
in a standard colormap, use XmuGetColormapAllocation.

XmuGetColormapAllocation returns 0 on failure, non-zero on
success.  It is assumed that the visual is appropriate for
the colormap property.


XStandardColormap *XmuStandardColormap(dpy, screen, visualid, depth, property,
				       cmap, red_max, green_max, blue_max)
      Display dpy;
      int screen;
      VisualID visualid;
      unsigned int depth;
      Atom property;
      Colormap cmap;
      unsigned long red_max, green_max, blue_max;


dpy	  specifies the connection to the X server

screen	  specifies the screen of the display

visualid  specifies the visual type

depth	  specifies the visual depth

property  specifies the standard colormap property

cmap	  specifies the colormap ID, or None

red_max   specifies the red allocation

green_max specifies the green allocation

blue_max  specifies the blue allocation










			    -38-


To create any one standard colormap, use XmuStandardCol-
ormap.

This function creates a standard colormap for the given
screen, visualid, and visual depth, with the given red,
green, and blue maximum values, with the given standard
property name.	Upon success, it returns a pointer to an
XStandardColormap structure which describes the newly cre-
ated colormap.	Upon failure, it returns NULL.	If cmap is
the default colormap of the screen, the standard colormap
will be defined on the default colormap; otherwise a new
colormap is created.

Resources created by this function are not made permanent;
that is the caller's responsibility.


Status XmuCreateColormap(dpy, colormap)
      Display *dpy;
      XStandardColormap *colormap;


dpy	  specifies the connection under which the map is
	  created

colormap  specifies the map to be created

To create any one colormap which is described by an XStan-
dardColormap structure, use XmuCreateColormap.

This function returns 0 on failure, and non-zero on success.
The base_pixel of the colormap is set on success.  Resources
created by this function are not made permanent.  No argu-
ment error checking is provided; use at your own risk.

All colormaps are created with read-only allocations, with
the exception of read-only allocations of colors which fail
to return the expected pixel value, and these are individu-
ally defined as read/write allocations.  This is done so
that all the cells defined in the colormap are contiguous,
for use in image processing.  This typically happens with
White and Black in the default map.

Colormaps of static visuals are considered to be success-
fully created if the map of the static visual matches the
definition given in the standard colormap structure.


void XmuDeleteStandardColormap(dpy, screen, property)
      Display *dpy;
      int screen;
      Atom property;











			    -39-


dpy	  specifies the connection to the X server

screen	  specifies the screen of the display

property  specifies the standard colormap property

To remove any standard colormap property, use XmuDeleteS-
tandardColormap.  This function will remove the specified
property from the specified screen, releasing any resources
used by the colormap(s) of the property, if possible.


16.  Widget Description Functions

The functions defined in this section are for building a
description of the structure of and resources associated
with a hierarchy of widget classes.  This package is typi-
cally used by applications that wish to manipulate the wid-
get set itself.

The definitions needed to use these interfaces are in the
header file <X11/Xmu/WidgetNode.h>.  The following function
must be called before any of the others described below:


void XmuWnInitializeNodes(node_array, num_nodes)
      XmuWidgetNode *node_array;
      int num_nodes;


node_array
	  specifies a list of widget classes, in alphabeti-
	  cal order

num_nodes specfies the number of widget classes in the node
	  array

To determine the resources provided by a widget class or
classes, use


void XmuWnFetchResources(node, toplevel, top_node)
      XmuWidgetNode *node;
      Widget toplevel;
      XmuWidgetNode *top_node;


node	  specifies the widget class for which resources
	  should be obtained.

toplevel  specifies the widget that should be used for cre-
	  ating an instance of node from which resources are
	  extracted.  This is typically the value returned
	  by XtAppInitialize.









			    -40-


top_node  specifies the ancestor of node that should be
	  treated as the root of the widget inheritance tree
	  (used in determining which ancestor contributed
	  which resources).

Each widget class inherits the resources of its parent.  To
count the number of resources contributed by a particular
widget class, use:


int XmuWnCountOwnedResources(node, owner_node, constraints)
      XmuWidgetNode *node;
      XmuWidgetNode *owner_node;
      Bool constraints;


node	  specifies the widget class whose resources are
	  being examined.

owner_node
	  specifies the widget class of the ancestor of node
	  whose contributions are being counted.

constraints
	  specifies whether or not to count constraint
	  resources or normal resources.

This routine returns the number of resources contributed (or
``owned'') by the specified widget class.


XmuWidgetNode *XmuWnNameToNode(node_list, num_nodes, name)
      XmuWidgetNode *node_list;
      int num_nodes;
      char *name;


node_list specifies a list of widget nodes

num_nodes specifies the number of nodes in the list

name	  specifies the name of the widget class in the node
	  list to search for

This function returns the WidgetNode in the list that
matches the given widget name or widget class name.  If no
match is found, it returns NULL.


17.  Participation in the Editres Protocol

To participate in the editres protocol, applications which
are not based on the Athena widget set should include the
header file <X11/Xmu/Editres.h>.









			    -41-


To participate in the editres protocol, Xt applications
which do not rely on the Athena widget set should register
the editres protocol handler on each shell widget in the
application, specifying an event mask of 0, nonmaskable
events, and client data as NULL:

XtAddEventHandler(shell, (EventMask) 0, True, _XEd-
itResCheckMessages, NULL);




















































