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authorReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
committerReinhard Tartler <siretart@tauware.de>2011-10-10 17:43:39 +0200
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+.\"
+.\" Copyright (c) 1999 by The XFree86 Project, Inc.
+.\"
+.\" Permission is hereby granted, free of charge, to any person obtaining a
+.\" copy of this software and associated documentation files (the "Software"),
+.\" to deal in the Software without restriction, including without limitation
+.\" the rights to use, copy, modify, merge, publish, distribute, sublicense,
+.\" and/or sell copies of the Software, and to permit persons to whom the
+.\" Software is furnished to do so, subject to the following conditions:
+.\"
+.\" The above copyright notice and this permission notice shall be included in
+.\" all copies or substantial portions of the Software.
+.\"
+.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+.\" IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+.\" FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+.\" THE XFREE86 PROJECT BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+.\" WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
+.\" OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+.\" SOFTWARE.
+.\"
+.\" Except as contained in this notice, the name of the XFree86 Project shall
+.\" not be used in advertising or otherwise to promote the sale, use or other
+.\" dealings in this Software without prior written authorization from the
+.\" XFree86 Project.
+.\"
+.\" Author: Paulo César Pereira de Andrade
+.\"
+.\" $XFree86: xc/lib/Xaw/Xaw.man,v 1.7 2001/11/04 21:16:39 paulo Exp $
+.\"
+.de TQ
+.br
+.ns
+.TP \\$1
+..
+.TH Xaw 3 __vendorversion__
+.SH NAME
+ Xaw \- X Athena Widgets
+.SH DESCRIPTION
+.B Xaw
+is a widget set based on the X Toolkit Intrinsics (Xt) Library. This
+release by the X.org Foundation includes additions and modifications
+originally made for The XFree86 Project, Inc. This manual page describes
+these changes as well as some of the common interfaces between its version
+and the previous X Consortium release (Xaw6).
+.SH ACTIONS
+All of the \fIXaw\fR widgets now have the additional translations
+.B call-proc, declare, get-values
+and \fBset-values\fP. The syntax for these actions is:
+.PP
+.I action-name \fP(\fIboolean-expression\fP, \fIarguments\fP)
+.PP
+\fBAction-name\fP is one of \fIcall-proc\fP, \fIdeclare\fP,
+\fIget-values\fP or \fIset-values\fP.
+.PP
+\fBBoolean-expression\fP is composed with the operators \fI|\fR (or), \fI&\fR
+(and), \fI^\fR (xor), and \fI~\fR (not). The operands can be a variable name,
+which starts with a \fI$\fR; a resource name without the bindings \fI.\fP
+or \fI*\fP; or a constant name, including \fImine\fP (event->xany.window
+== XtWindow(widget)), \fIfaked\fP (event->xany.send_event != 0), \fItrue\fP (1)
+and \fIfalse\fP (0).
+.PP
+\fBArguments\fP are self-explanatory; when starting with a \fI$\fP they name
+a variable, otherwise, they indicate a resource name.
+.TP 8
+.B call-proc \fP(\fIboolean-expression\fP, \fIprocedure-name\fP)
+This action allows the evaluation of a boolean expression in the first
+parameter before calling a action procedure. The procedure is only called
+if the expression evaluates as true. Example:
+.br
+.I call-proc("$inside & $pressed", notify)
+.TP 8
+.B declare \fP(\fIboolean-expression\fP, \fIvariable\fP, \fIvalue\fP, ...)
+This action is used to create new variables or change their values. Any
+number of variable-value tuples may be specified. Example:
+.br
+.I declare(1, $pressed, 1)
+.TP 8
+.B get-values \fP(\fIboolean-expression\fP, \fIvariable\fP, \fIvalue\fP, ...)
+This action reads a widget resource value into a variable. Any number of
+variable-value tuples may be specified. Example:
+.br
+.I get-values(1, $fg, foreground, $bg, background)
+.TP 8
+.B set-values \fP(\fIboolean-expression\fP, \fIvariable\fP, \fIvalue\fP, ...)
+This action sets a widget resource to the given value, which may be a
+variable. Any number of variable-value tuples may be specified. Example:
+.br
+.I set-values(1, foreground, $bg, background, $fg)
+.PP
+Here is a sample translation to make a label widget behave like a button:
+.PP
+.nf
+<Map>: get-values(1, $fg, foreground, $bg, background)\\n\\
+<Btn1Down>: set-values(1, foreground, yellow, background, gray30)\\n\\
+<Btn1Up>: set-values(1, foreground, $fg, background, $bg)
+.fi
+.SH DISPLAY LISTS
+All of the \fBXaw\fP widgets have now the additional resource
+\fIdisplayList\fP. This resource allows drawing the widget decorations
+using commands embedded in a resource string. The displayList resource has
+the syntax:
+.PP
+\fI[class-name:]function-name arguments[[{;\\n}]...]\fP
+.PP
+\fBClass-name\fP is any registered set of functions to draw in the widget.
+Currently the only existing class is \fIxlib\fP, which provides access to
+the Xlib drawing primitives.
+.PP
+\fBFunction-name\fP is the drawing or configuration function to be called,
+described bellow.
+.PP
+\fBArguments\fP may be anything suitable to the displayList function being
+called. When the function requires a coordinate, the syntax is
+\fI{+-}<integer>\fP or \fI<integer>/<integer>\fP. Examples:
+.nf
+ +0,+0 top, left
+ -0,-0 bottom, right
+ -+10,-+10 bottom+10, right+10
+ +0,1/2 left, vertical-center
+.fi
+.TP 8
+.B arc-mode \fPmode
+Sets the arc mode. Accepted \fImode\fPs are "pieslice" and "chord", which
+set the arc to ArcPieSlice or ArcChord, respectively. Example:
+.br
+.I arc-mode chord
+.TP 8
+.B bg \fPcolor-spec
+.TQ
+.B background \fPcolor-spec
+Sets the background color. \fIcolor-spec\fP must a valid color
+specification. Example:
+.br
+.I background red
+.TP 8
+.B cap-style \fPstyle
+Sets the cap style. Accepted \fIstyle\fPs are "notlast", "butt", "round",
+and "projecting", which set the cap style to CapNotLast, CapBut, CapRound
+or CapProjecting, respectively. Example:
+.br
+.I cap-style round
+.TP 8
+.B clip-mask \fPpixmap-spec
+Sets the pixmap for the clip mask. Requires a pixmap parameter, as
+described in the \fBPIXMAPS\fP section below. Example:
+.br
+.I clip-mask xlogo11
+.TP 8
+.B clip-origin \fPx,y
+Sets the clip x and y origin. Requires two arguments, the x and y
+coordinates. Example:
+.br
+.I clip-origin 10,10
+.TP 8
+.B clip-rects \fPx1,y1,x2,y2 [...,xn,yn]
+.TQ
+.B clip-rectangles \fPx1,y1,x2,y2 [...,xn,yn]
+Sets a list of rectangles to the clip mask. The number of arguments must
+be a multiple of four. The arguments are coordinates. The parser
+calculates the width and height of the rectangles. Example:
+.br
+.I clip-rects 0,0,10,20, 20,10,30,30
+.TP 8
+.B coord-mode \fPmode
+Changes the coord mode for \fIfill-polygon\fP, \fIdraw-lines\fP, and
+\fIdraw-points\fP. Accepted parameters are "modeorigin" and "previous",
+that sets the coord mode to CoordModeOrigin or CoordModePrevious,
+respectively. Example:
+.br
+.I coord-mode previous
+.TP 8
+.B copy-area \fP{pixmap-spec|.},dstx,dsty[,x2,y2,srcx,srcy]
+Calls XCopyArea. The character \fI.\fP means copy the window contents;
+pixmap-spec is as defined in the \fBPIXMAPS\fP section below. \fIX2\fP and
+\fIy2\fP are the coordinates of the end copy, not the width and height; if
+not defined, the parser calculates them. \fIsrc_x\fP and \fIsrc_y\fP
+default to zero. Example:
+.br
+.I copy-area Term,10,10
+.TP 8
+.B copy-plane \fP{pixmap-spec|.},dstx,dsty[,x2,y2,srcx,srcy,plane]
+Calls XCopyPlane. The character \fI.\fP means copy the window contents;
+pixmap-spec is as defined in the \fBPIXMAPS\fP section below. \fIX2\fP and
+\fIy2\fP are the coordinates of the end copy, not the width and height; if
+not defined, the parser calculates them. \fIsrc_x\fP and \fIsrc_y\fP
+default to zero. \fIPlane\fP defaults to one. Example:
+.br
+.I copy-plane star,10,10
+.TP 8
+.B dashes \fPi1[...,in]
+Sets the dashes for line drawing. Accepts up to 127 arguments. Example:
+.br
+.I dashes 3,7 9,10
+.TP 8
+.B draw-arc \fPx1,y1,x2,y2[,start-angle,end-angle]
+Draws an arc. The four first arguments are the rectangle enclosing the
+arc. The two remaining arguments, if specified, are the start and end
+angle, in degrees. Example:
+.br
+.I draw-arc +0,+0,-1,-1,0,90
+.TP 8
+.B draw-rect \fPx1,y1,x2,y2
+.TQ
+.B draw-rectangle \fPx1,y1,x2,y2
+Draws a rectangle. Requires four arguments, which are the start and end
+coordinate pairs. Example:
+.br
+.I draw-rect +1,+1,-5,-5
+.TP 8
+.B draw-string \fPx,y,"string"
+Draws a text string. Requires three arguments, a x coordinate, a y
+coordinate, and a string. Strings that have white space can be quoted with
+the \fI"\fP character; the backslash character \fI\\\fP can also be used,
+but it will be necessary escape it twice. Example:
+.br
+\fI draw-string 10,10, "Hello world!"\fP
+.TP 8
+.B exposures \fPboolean
+Sets graphics exposures in the GC. Allowed parameters are a integer or the
+strings "true", "false", "on" and "off". Example:
+.br
+.I exposures true
+.TP 8
+.B fill-arc \fPx1,y1,x2,y2[,start-angle,end-angle]
+Like \fIdraw-arc\fP, but fills the contents of the arc with the currently
+selected foreground. Example:
+.br
+.I fill-arc +0,+0,-1,-1,0,180
+.TP 8
+.B fill-poly \fPx1,y1 [...,xn,yn]
+.TQ
+.B fill-polygon \fPx1,y1 [...,xn,yn]
+Like \fIdraw-lines\fP, but fills the enclosed polygon and joins the first
+and last point, if they are not at the same position. Example:
+.br
+.I fill-poly +0,+10, +10,+20, +30,+0
+.TP
+.B fill-rect \fPx1,y1,x2,y2
+.TQ
+.B fill-rectangle \fPx1,y1,x2,y2
+Like \fIdraw-rect\fP, but fills the contents of the rectangle with the
+selected foreground color. Example:
+.br
+.I fill-rect +10,+10,-20,-20
+.TP 8
+.B fill-rule \fPrule
+Sets the fill rule. Accepted parameters are "evenodd" and "winding", which
+set the fill rule to EvenOddRule or WindingRule, respectively. Example:
+.br
+.I
+fill-rule winding
+.TP 8
+.B fill-style \fPstyle
+Sets the fill style. Allowed parameters are "solid", "tiled", "stippled" and
+"opaquestippled", which set the fill style to FillSolid, FillTiled,
+FillStippled or FillOpaqueStippled, respectively. Example:
+.br
+.I fill-style tiled
+.TP 8
+.B font \fPfont-spec
+Sets the font for text functions. Example:
+.br
+.I font -*-*-*-R-*-*-*-120-*-*-*-*-ISO8859-1
+.TP 8
+.B fg \fPcolor-spec
+.TQ
+.B foreground \fPcolor-spec
+Like \fIbackground\fP, but sets the current foreground color. Example:
+.br
+.I foreground blue
+.TP 8
+.B mask
+This command is useful when you want to draw only in the region that really
+needs to be repainted. Requires no arguments.
+.TP 8
+.B function \fPfunction-spec
+Sets the specific GC function. Allowed parameters are "set", "clear", "and",
+"andreverse", "copy", "andinverted", "noop", "xor", "or", "nor", "equiv",
+"invert", "orreverse", "copyinverted" and "nand", which set the function to
+GXset, GXclear, GXand, GXandReverse, GXcopy, GXandInverted, GXnoop, GXxor,
+GXor, GXnor, GXequiv, GXinvert, GXorReverse, GXcopyInverted or GXnand,
+respectively. Example:
+.br
+.I function xor
+.TP 8
+.B join-style \fPstyle
+Sets the join style. Allowed parameters are "miter", "round" and "bevel",
+which set the join style to JoinMiter, JoinRound and JoinBevel,
+respectively. Example:
+.br
+.I join-style round
+.TP 8
+.B image \fP{pixmap-spec},xs,ys,[xe,ye]
+This function is implemented as a way to quickly compose complex
+decorations in widgets. \fIPixmap-spec\fP is as defined in the
+\fBPIXMAPS\fP section below. \fIxs\fP and \fIys\fP are the coordinates from
+where to start copying the pixmap; \fIxe\fP and \fIye\fP are optional (they
+default to xs + pixmap.width and ys + pixmap.height, respectively). If the
+pixmap has a mask, the copy is masked accordingly. Example:
+.br
+.I image pixmap.xpm,0,0,20,20
+.TP 8
+.B line \fPx1,y1,x2,y2
+.TQ
+.B draw-line \fPx1,y1,x2,y2
+Draws a line with the current foreground color. Requires four arguments,
+the starting and ending coordinate pairs. Example:
+.br
+.I line +0,+0, -1,-1
+.TP 8
+.B line-width \fPinteger
+Selects a line width for drawing. Example:
+.br
+.I line-width 2
+.TP 8
+.B line-style \fPstyle
+Sets the line style. Accepted parameters are "solid", "onoffdash" and
+"doubledash", which set the line style to LineSolid, LineOnOffDash or
+LineDoubleDash, respectively. Example:
+.br
+.I line-style onoffdash
+.TP 8
+.B lines \fPx1,y1,x2,y2 [...,xn,yn]
+.TQ
+.B draw-lines \fPx1,y1,x2,y2 [...,xn,yn]
+Draws a list of lines. Any number of argument pairs may be supplied.
+Example:
+.br
+.I lines +0,-1, -1,-1, -1,+0
+.TP 8
+.B paint-string \fPx,y,"string"
+Identical to draw-string, but also uses the background color. Example:
+.br
+\fI paint-string 10,20, "Sample text"\fP
+.TP 8
+.B point \fPx,y
+.TQ
+.B draw-point \fPx,y
+Draws a point. Requires two arguments, a coordinate pair. Example:
+.br
+.I point +10,+10
+.TP 8
+.B plane-mask \fPinteger
+Sets the plane mask. Requires an integer parameter. Example:
+.br
+.I plane-mask -1
+.TP 8
+.B points \fPx1,y1 [...,xn,yn]
+.TQ
+.B draw-points \fPx1,y1 [...,xn,yn]
+Draws a list of points at the specified coordinates. Example:
+.br
+.I points +1,+2, +1,+4, +1,+6
+.TP 8
+.B segments \fPx1,y1,x2,y2 [...,xn,yn]
+.TQ
+.B draw-segments \fPx1,y1,x2,y2 [...,xn,yn]
+Draws a list of segment lines. The number of parameters must be multiple
+of 4. Example:
+.br
+.I segments +1,+2,+1,-3, +2,-2,-3,-2
+.TP 8
+.B shape-mode \fPmode
+Sets the shape mode used in \fIfill-polygon\fP. Accepted parameters are
+"complex", "convex" or "nonconvex", which set the shape mode to Complex,
+Convex or Nonconvex, accordingly. Example:
+.br
+.I shape-mode convex
+.TP 8
+.B stipple \fPpixmap-spec
+Sets the pixmap for a stipple. Requires a pixmap parameter, as described
+in the \fBPIXMAPS\fP section below. Example:
+.br
+.I stipple plaid
+.TP 8
+.B subwindow-mode \fPmode
+Sets the subwindow mode in the GC. Accepted parameters are
+"includeinferiors" and "clipbychildren", which set the subwindow mode to
+IncludeInferiors or ClipByChildren, respectively. Example:
+.br
+.I subwindow-mode includeinferiors
+.TP 8
+.B tile \fPpixmap-spec
+Sets the pixmap for a tile. Requires a pixmap parameter, as described
+in the \fBPIXMAPS\fP section below. Example:
+.br
+.I tile xlogo11?foreground=red&background=gray80
+.TP 8
+.B ts-origin \fPx,y
+Sets the tile stipple x and y origin. Requires two arguments, a x and y
+coordinate. Example:
+.br
+.I ts-origin 10,10
+.TP 8
+.B umask
+Disables the GC mask, if it has been set with the command \fImask\fP.
+Requires no arguments.
+.PP
+Example for drawing a shadow effect in a widget:
+.nf
+foreground gray30;\\
+draw-lines +1,-1,-1,-1,-1,+1;\\
+foreground gray85;\\
+draw-lines -1,+0,+0,+0,+0,-1
+.fi
+.SH PIXMAPS
+A String to Pixmap converter has been added to \fBXaw\fP. This converter
+is meant to be extended, and has enough abstraction to allow loading
+several image formats. It uses a format that resembles a \fIURL\fP, with
+the syntax:
+.PP
+.I [type:]name[?arg=val[{&}...]]
+.PP
+\fBType\fP can be one of \fIbitmap\fP, \fIgradient\fP or \fIxpm\fP.
+.PP
+\fBName\fP may be a file name, or, in the case of type \fIgradient\fP, may be
+either \fIvertical\fP or \fIhorizontal\fP.
+.PP
+\fBArg=val\fP is a list of arguments to the converter. An argument list is
+preceded by a question mark, and multiple arguments are separated by
+ampersands. The most common arguments are \fIforeground\fP and
+\fIbackground\fP. Gradients also support the arguments \fIstart\fP and
+\fIend\fP (colors with which to start and end the gradient); the
+\fPsteps\fP argument, to allow using less colors; and the \fIdimension\fP
+argument to specify the size of the gradient. The \fIxpm\fP converter
+understands the \fIcloseness\fP argument, which aids in using fewer colors
+(useful if you have a limited colormap).
+.SH TEXT WIDGET
+Most of the changes to this version of the Xaw library were done in the
+TextWidget, TextSrcObject, TextSinkObject and related files.
+.PP
+A couple of highly visible changes in the Text widget are due to many bugs
+in the Xaw6 implementation involving scrollbars and auto-resizing.
+Scrollbars being added or removed caused several problems in keeping the
+text cursor visible, and in Xaw6 it was very easy to have a widget thinking
+the cursor was visible, when it was not. Also, permitting automatic
+resizing of the widget to a larger geometry created other problems, making
+it difficult to have a consistent layout in the application, and, if the
+window manager did not interfere, windows larger than the screen could
+result. Therefore, some functionality involving scrollbars and
+auto-resizing has been disabled; see the section on new and modified
+Text widget resources below.
+.PP
+The Text widget's default key bindings were originally based on the Emacs
+text editor. In this release, even more operations familiar to Emacs users
+have been added. New text actions include:
+.TP 8
+.B indent
+Indents text blocks. Not bound by default. The Text widget also does not
+attempt to perform auto-indentation of its source object by default.
+.TP 8
+.B keyboard-reset
+Resets the keyboard state. Reverts the action multiplier to 1, and if undo
+is enabled, toggles between undo and redo. Bound by default to
+\fIControl<Key>G\fP.
+.TP 8
+.B kill-ring-yank
+In this version of Xaw, text killed in any text field is kept in memory,
+allowing cut and paste operations internally to the program between text
+fields. Bound by default to \fIMeta<Key>Y\fP.
+.TP 8
+.B numeric
+Listed here only for purposes of documentation. Called by default when one
+of the characters \fI1, 2, 3, 4, 5, 6, 7, 8, 9, 0,\fP or \fI-\fP is typed,
+allowing composition of the multiplication number of text actions.
+.TP 8
+.B set-keyboard-focus
+Sets the input focus of the top level widget to the text field. Not
+enabled by default, but bound to the \fI<Btn1Down>\fP event.
+.TP 8
+.B toggle-overwrite
+Toggles overwrite mode. In overwrite mode, any text inserted in a text
+field will replace existing text. Bound by default to \fI<Key>Insert\fP.
+.TP 8
+.B undo
+Sets the \fIenableUndo\fP resource of the textSrcObject. Not enabled by
+default, but bound to \fIControl<Key>_\fP.
+.PP
+New and modified Text widget resources include:
+.TP 8
+.B justify (\fPClass\fB Justify)
+Sets the text justification. Can be one of \fIleft, right, center\fP, or
+\fIfull\fP. Only enabled when the \fIautoFill\fP resource is set, and the
+resources \fIleftColumn\fP and \fIrightColumn\fP are correctly set.
+.TP 8
+.B leftColumn (\fPClass\fB Column)
+Specifies the left column at which to break text. Text lines started with
+an alphanumeric character will automatically start at this column.
+.TP 8
+.B positionCallback (\fPClass\fB Callback)
+Allows installation of a callback to be called every time the cursor is
+moved, and/or the file changes its size. The callback is called with a
+pointer to a structure containing the following data:
+.nf
+typedef struct {
+ int line_number;
+ int column_number;
+ XawTextPosition insert_position;
+ XawTextPosition last_position;
+ Boolean overwrite_mode;
+} XawTextPositionInfo;
+.fi
+This callback is intended to help programmers write text editors based
+on the Xaw widget set.
+.TP 8
+.B resize (\fPClass\fB Resize)
+No longer supported, but recognized for backward compatibility with
+resource specifications written for the Xaw6 Text widget.
+.TP 8
+.B rightColumn (\fPClass\fB Column)
+Specifies the right column at which to break text. Text lines started with
+an alphanumeric character will automatically end at this column.
+.TP 8
+.B scrollHorizontal (\fPClass\fB Scroll)
+.TQ
+.B scrollVertical (\fPClass\fB Scroll)
+These resources control the placement of scrollbars on the left and bottom
+edges of the Text widget. They accept the values \fIXawtextScrollAlways\fP
+and \fIXawtextScrollNever\fP. A converter is registered for this resource
+that will convert the following strings: \fIalways\fP and \fInever\fP. The
+value \fIXawtextScrollWhenNeeded\fP (and \fIwhenNeeded\fP, recognized by
+the converter), is accepted for backwards compatibility with resource
+specifications written for the Xaw6 Text widget, but ignored (effectively
+treated as \fIXawtextScrollNever\fP).
+.SH TEXT SOURCE OBJECT
+The textSrcObject allows display of its contents to more than one window,
+and also stores undo information. The new resources for the textSrcObject
+are:
+.TP 8
+.B callback (\fPClass\fB Callback)
+Previous versions of Xaw had this resource in subclasses of the TextSource
+object. This was changed to make it possible to tell the callback the
+state of the text when undo is enabled.
+.TP 8
+.B enableUndo (\fPClass\fB Undo)
+A boolean resource that enables or disables the undo function. The default
+value is False.
+.TP 8
+.B sourceChanged (\fPClass\fB Changed)
+Like the callback resource, this resource was previously in subclasses of
+the TextSource object. It is now in the textSrcObject to control the
+changed/unchanged state when undo is enabled.
+.SH TEXT SINK OBJECT
+The textSinkObject subclasses asciiSinkObject and multiSinkObject have been
+changed slightly to use a new cursor shape (no longer a caret at the
+baseline) that indicates the input focus of the text widget, and allow
+specification of the cursor color. The new resource is:
+.TP 8
+.B cursorColor (\fPClass\fB Color)
+Sets the cursor color of the text. This color is also used to draw
+selected text.
+.SH SIMPLE MENU WIDGET
+The simpleMenuWidget algorithm to lay out menu entries has been changed to
+enable multiple columns when a single column does not fit on the screen.
+It was also modified to enable submenus.
+.SH SME BSB OBJECT
+A new resource has been added to the smeBSBObject to allow binding submenus
+to it. The new resource is:
+.TP 8
+.B menuName (\fPClass\fB MenuName)
+Specifies the name of the popup widget to be popped up when the pointer is
+over the menu entry, or NULL. Note that the named menu must be a child of
+the popup parent of the smeBSBObject.
+.SH RESTRICTIONS
+.B Xaw
+is actively being developed. Programs intending to be fully compatible
+with future releases of the Xaw library should use only the public
+interfaces. While widget subclassification is not a bad thing, and
+sometimes an encouraged programming practice, programs that access private
+data structures may have problems with newer releases in the current stage
+of
+.I Xaw
+development. Efforts are being made to avoid such problems and to guarantee
+that newer releases will be source and binary compatible.
+.SH AUTHORS
+The original X Consortium version of the Athena Widget Set and its
+documentation were the work of many people, including Chris D. Peterson,
+Ralph Swick, Mark Ackerman, Donna Converse, Jim Fulton, Loretta
+Guarino-Reid, Charles Haynes, Rich Hyde, Mary Larson, Joel McCormack, Ron
+Newman, Jeanne Rich, Terry Weissman, Mike Gancarz, Phil Karlton, Kathleen
+Langone, Ram Rao, Smokey Wallace, Al Mento, and Jean Diaz.
+.PP
+The additions and modifications to \fIXaw\fR which were
+originally made for XFree86 were written by Paulo
+C\('esar Pereira de Andrade.
+.SH SEE ALSO
+.I Athena Widget Set - C Language Interface