/* 
 * tkButton.c --
 *
 *	This module implements a collection of button-like
 *	widgets for the Tk toolkit.  The widgets implemented
 *	include labels, buttons, checkbuttons, and radiobuttons.
 *
 * Copyright (c) 1990-1994 The Regents of the University of California.
 * Copyright (c) 1994-1998 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tkButton.c,v 1.20 2002/08/08 09:35:34 hobbs Exp $
 */

#include "tkButton.h"
#include "default.h"

typedef struct ThreadSpecificData { 
    int defaultsInitialized;
} ThreadSpecificData;
static Tcl_ThreadDataKey dataKey;

/*
 * Class names for buttons, indexed by one of the type values defined
 * in tkButton.h.
 */

static char *classNames[] = {"Label", "Button", "Checkbutton", "Radiobutton"};

/*
 * The following table defines the legal values for the -default option.
 * It is used together with the "enum defaultValue" declaration in tkButton.h.
 */

static char *defaultStrings[] = {
    "active", "disabled", "normal", (char *) NULL
};

/*
 * The following table defines the legal values for the -state option.
 * It is used together with the "enum state" declaration in tkButton.h.
 */

static char *stateStrings[] = {
    "active", "disabled", "normal", (char *) NULL
};

/*
 * The following table defines the legal values for the -compound option.
 * It is used with the "enum compound" declaration in tkButton.h
 */

static char *compoundStrings[] = {
    "bottom", "center", "left", "none", "right", "top", (char *) NULL
};

/*
 * Information used for parsing configuration options.  There is a
 * separate table for each of the four widget classes.
 */

static Tk_OptionSpec labelOptionSpecs[] = {
    {TK_OPTION_BORDER, "-activebackground", "activeBackground", "Foreground",
	DEF_BUTTON_ACTIVE_BG_COLOR, -1, Tk_Offset(TkButton, activeBorder),
	0, (ClientData) DEF_BUTTON_ACTIVE_BG_MONO, 0},
    {TK_OPTION_COLOR, "-activeforeground", "activeForeground", "Background",
	DEF_BUTTON_ACTIVE_FG_COLOR, -1, Tk_Offset(TkButton, activeFg),
	TK_OPTION_NULL_OK, (ClientData) DEF_BUTTON_ACTIVE_FG_MONO, 0},
    {TK_OPTION_ANCHOR, "-anchor", "anchor", "Anchor",
	DEF_BUTTON_ANCHOR, -1, Tk_Offset(TkButton, anchor), 0, 0, 0},
    {TK_OPTION_BORDER, "-background", "background", "Background",
	DEF_BUTTON_BG_COLOR, -1, Tk_Offset(TkButton, normalBorder),
	0, (ClientData) DEF_BUTTON_BG_MONO, 0},
    {TK_OPTION_SYNONYM, "-bd", (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-borderwidth", 0},
    {TK_OPTION_SYNONYM, "-bg", (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-background", 0},
    {TK_OPTION_BITMAP, "-bitmap", "bitmap", "Bitmap",
	DEF_BUTTON_BITMAP, -1, Tk_Offset(TkButton, bitmap),
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
	DEF_BUTTON_BORDER_WIDTH, Tk_Offset(TkButton, borderWidthPtr),
	Tk_Offset(TkButton, borderWidth), 0, 0, 0},
    {TK_OPTION_STRING_TABLE, "-compound", "compound", "Compound",
	 DEF_BUTTON_COMPOUND, -1, Tk_Offset(TkButton, compound), 0,
	 (ClientData) compoundStrings, 0},
    {TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor",
	DEF_BUTTON_CURSOR, -1, Tk_Offset(TkButton, cursor),
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_COLOR, "-disabledforeground", "disabledForeground",
	"DisabledForeground", DEF_BUTTON_DISABLED_FG_COLOR,
	-1, Tk_Offset(TkButton, disabledFg), TK_OPTION_NULL_OK,
	(ClientData) DEF_BUTTON_DISABLED_FG_MONO, 0},
    {TK_OPTION_SYNONYM, "-fg", "foreground", (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-foreground", 0},
    {TK_OPTION_FONT, "-font", "font", "Font",
	DEF_BUTTON_FONT, -1, Tk_Offset(TkButton, tkfont), 0, 0, 0},
    {TK_OPTION_COLOR, "-foreground", "foreground", "Foreground",
	DEF_BUTTON_FG, -1, Tk_Offset(TkButton, normalFg), 0, 0, 0},
    {TK_OPTION_STRING, "-height", "height", "Height",
	DEF_BUTTON_HEIGHT, Tk_Offset(TkButton, heightPtr), -1, 0, 0, 0},
    {TK_OPTION_BORDER, "-highlightbackground", "highlightBackground",
	"HighlightBackground", DEF_BUTTON_HIGHLIGHT_BG_COLOR,
	-1, Tk_Offset(TkButton, highlightBorder), 0,
	(ClientData) DEF_BUTTON_HIGHLIGHT_BG_MONO, 0},
    {TK_OPTION_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
	DEF_BUTTON_HIGHLIGHT, -1, Tk_Offset(TkButton, highlightColorPtr),
	0, 0, 0},
    {TK_OPTION_PIXELS, "-highlightthickness", "highlightThickness",
	"HighlightThickness", DEF_LABEL_HIGHLIGHT_WIDTH,
	Tk_Offset(TkButton, highlightWidthPtr),
	Tk_Offset(TkButton, highlightWidth), 0, 0, 0},
    {TK_OPTION_STRING, "-image", "image", "Image",
	DEF_BUTTON_IMAGE, Tk_Offset(TkButton, imagePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_JUSTIFY, "-justify", "justify", "Justify",
	DEF_BUTTON_JUSTIFY, -1, Tk_Offset(TkButton, justify), 0, 0, 0},
    {TK_OPTION_PIXELS, "-padx", "padX", "Pad",
	DEF_LABCHKRAD_PADX, Tk_Offset(TkButton, padXPtr),
	Tk_Offset(TkButton, padX), 0, 0, 0},
    {TK_OPTION_PIXELS, "-pady", "padY", "Pad",
	DEF_LABCHKRAD_PADY, Tk_Offset(TkButton, padYPtr),
	Tk_Offset(TkButton, padY), 0, 0, 0},
    {TK_OPTION_RELIEF, "-relief", "relief", "Relief",
	DEF_LABCHKRAD_RELIEF, -1, Tk_Offset(TkButton, relief), 0, 0, 0},
    {TK_OPTION_STRING_TABLE, "-state", "state", "State",
	DEF_BUTTON_STATE, -1, Tk_Offset(TkButton, state),
	0, (ClientData) stateStrings, 0},
    {TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus",
	DEF_LABEL_TAKE_FOCUS, Tk_Offset(TkButton, takeFocusPtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING, "-text", "text", "Text",
	DEF_BUTTON_TEXT, Tk_Offset(TkButton, textPtr), -1, 0, 0, 0},
    {TK_OPTION_STRING, "-textvariable", "textVariable", "Variable",
	DEF_BUTTON_TEXT_VARIABLE, Tk_Offset(TkButton, textVarNamePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_INT, "-underline", "underline", "Underline",
	DEF_BUTTON_UNDERLINE, -1, Tk_Offset(TkButton, underline), 0, 0, 0},
    {TK_OPTION_STRING, "-width", "width", "Width",
	DEF_BUTTON_WIDTH, Tk_Offset(TkButton, widthPtr), -1, 0, 0, 0},
    {TK_OPTION_PIXELS, "-wraplength", "wrapLength", "WrapLength",
	DEF_BUTTON_WRAP_LENGTH, Tk_Offset(TkButton, wrapLengthPtr),
	Tk_Offset(TkButton, wrapLength), 0, 0, 0},
    {TK_OPTION_END, (char *) NULL, (char *) NULL, (char *) NULL,
	(char *) NULL, 0, 0, 0, 0}
};

static Tk_OptionSpec buttonOptionSpecs[] = {
    {TK_OPTION_BORDER, "-activebackground", "activeBackground", "Foreground",
	DEF_BUTTON_ACTIVE_BG_COLOR, -1, Tk_Offset(TkButton, activeBorder),
	0, (ClientData) DEF_BUTTON_ACTIVE_BG_MONO, 0},
    {TK_OPTION_COLOR, "-activeforeground", "activeForeground", "Background",
	DEF_BUTTON_ACTIVE_FG_COLOR, -1, Tk_Offset(TkButton, activeFg),
	TK_OPTION_NULL_OK, (ClientData) DEF_BUTTON_ACTIVE_FG_MONO, 0},
    {TK_OPTION_ANCHOR, "-anchor", "anchor", "Anchor",
	DEF_BUTTON_ANCHOR, -1, Tk_Offset(TkButton, anchor), 0, 0, 0},
    {TK_OPTION_BORDER, "-background", "background", "Background",
	DEF_BUTTON_BG_COLOR, -1, Tk_Offset(TkButton, normalBorder),
	0, (ClientData) DEF_BUTTON_BG_MONO, 0},
    {TK_OPTION_SYNONYM, "-bd", (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-borderwidth", 0},
    {TK_OPTION_SYNONYM, "-bg", (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-background", 0},
    {TK_OPTION_BITMAP, "-bitmap", "bitmap", "Bitmap",
	DEF_BUTTON_BITMAP, -1, Tk_Offset(TkButton, bitmap),
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
	DEF_BUTTON_BORDER_WIDTH, Tk_Offset(TkButton, borderWidthPtr),
	Tk_Offset(TkButton, borderWidth), 0, 0, 0},
    {TK_OPTION_STRING, "-command", "command", "Command",
	DEF_BUTTON_COMMAND, Tk_Offset(TkButton, commandPtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING_TABLE, "-compound", "compound", "Compound",
	 DEF_BUTTON_COMPOUND, -1, Tk_Offset(TkButton, compound), 0,
	 (ClientData) compoundStrings, 0},
    {TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor",
	DEF_BUTTON_CURSOR, -1, Tk_Offset(TkButton, cursor),
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING_TABLE, "-default", "default", "Default",
        DEF_BUTTON_DEFAULT, -1, Tk_Offset(TkButton, defaultState),
	0, (ClientData) defaultStrings, 0},
    {TK_OPTION_COLOR, "-disabledforeground", "disabledForeground",
	"DisabledForeground", DEF_BUTTON_DISABLED_FG_COLOR,
	-1, Tk_Offset(TkButton, disabledFg), TK_OPTION_NULL_OK,
	(ClientData) DEF_BUTTON_DISABLED_FG_MONO, 0},
    {TK_OPTION_SYNONYM, "-fg", "foreground", (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-foreground", 0},
    {TK_OPTION_FONT, "-font", "font", "Font",
	DEF_BUTTON_FONT, -1, Tk_Offset(TkButton, tkfont), 0, 0, 0},
    {TK_OPTION_COLOR, "-foreground", "foreground", "Foreground",
	DEF_BUTTON_FG, -1, Tk_Offset(TkButton, normalFg), 0, 0, 0},
    {TK_OPTION_STRING, "-height", "height", "Height",
	DEF_BUTTON_HEIGHT, Tk_Offset(TkButton, heightPtr), -1, 0, 0, 0},
    {TK_OPTION_BORDER, "-highlightbackground", "highlightBackground",
	"HighlightBackground", DEF_BUTTON_HIGHLIGHT_BG_COLOR,
	-1, Tk_Offset(TkButton, highlightBorder), 0,
	(ClientData) DEF_BUTTON_HIGHLIGHT_BG_MONO, 0},
    {TK_OPTION_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
	DEF_BUTTON_HIGHLIGHT, -1, Tk_Offset(TkButton, highlightColorPtr),
	0, 0, 0},
    {TK_OPTION_PIXELS, "-highlightthickness", "highlightThickness",
	"HighlightThickness", DEF_BUTTON_HIGHLIGHT_WIDTH,
	Tk_Offset(TkButton, highlightWidthPtr),
	Tk_Offset(TkButton, highlightWidth), 0, 0, 0},
    {TK_OPTION_STRING, "-image", "image", "Image",
	DEF_BUTTON_IMAGE, Tk_Offset(TkButton, imagePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_JUSTIFY, "-justify", "justify", "Justify",
	DEF_BUTTON_JUSTIFY, -1, Tk_Offset(TkButton, justify), 0, 0, 0},
    {TK_OPTION_RELIEF, "-overrelief", "overRelief", "OverRelief",
	 DEF_BUTTON_OVER_RELIEF, -1, Tk_Offset(TkButton, overRelief),
	 TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_PIXELS, "-padx", "padX", "Pad",
	DEF_BUTTON_PADX, Tk_Offset(TkButton, padXPtr),
	Tk_Offset(TkButton, padX), 0, 0, 0},
    {TK_OPTION_PIXELS, "-pady", "padY", "Pad",
	DEF_BUTTON_PADY, Tk_Offset(TkButton, padYPtr),
	Tk_Offset(TkButton, padY), 0, 0, 0},
    {TK_OPTION_RELIEF, "-relief", "relief", "Relief",
	DEF_BUTTON_RELIEF, -1, Tk_Offset(TkButton, relief),
	 0, 0, 0},
    {TK_OPTION_INT, "-repeatdelay", "repeatDelay", "RepeatDelay",
	 DEF_BUTTON_REPEAT_DELAY, -1, Tk_Offset(TkButton, repeatDelay),
	 0, 0, 0},
    {TK_OPTION_INT, "-repeatinterval", "repeatInterval", "RepeatInterval",
	 DEF_BUTTON_REPEAT_INTERVAL, -1, Tk_Offset(TkButton, repeatInterval),
	 0, 0, 0},
    {TK_OPTION_STRING_TABLE, "-state", "state", "State",
	DEF_BUTTON_STATE, -1, Tk_Offset(TkButton, state),
	0, (ClientData) stateStrings, 0},
    {TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus",
	DEF_BUTTON_TAKE_FOCUS, Tk_Offset(TkButton, takeFocusPtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING, "-text", "text", "Text",
	DEF_BUTTON_TEXT, Tk_Offset(TkButton, textPtr), -1, 0, 0, 0},
    {TK_OPTION_STRING, "-textvariable", "textVariable", "Variable",
	DEF_BUTTON_TEXT_VARIABLE, Tk_Offset(TkButton, textVarNamePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_INT, "-underline", "underline", "Underline",
	DEF_BUTTON_UNDERLINE, -1, Tk_Offset(TkButton, underline), 0, 0, 0},
    {TK_OPTION_STRING, "-width", "width", "Width",
	DEF_BUTTON_WIDTH, Tk_Offset(TkButton, widthPtr), -1, 0, 0, 0},
    {TK_OPTION_PIXELS, "-wraplength", "wrapLength", "WrapLength",
	DEF_BUTTON_WRAP_LENGTH, Tk_Offset(TkButton, wrapLengthPtr),
	Tk_Offset(TkButton, wrapLength), 0, 0, 0},
    {TK_OPTION_END, (char *) NULL, (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, 0, 0}
};

static Tk_OptionSpec checkbuttonOptionSpecs[] = {
    {TK_OPTION_BORDER, "-activebackground", "activeBackground", "Foreground",
	DEF_BUTTON_ACTIVE_BG_COLOR, -1, Tk_Offset(TkButton, activeBorder),
	0, (ClientData) DEF_BUTTON_ACTIVE_BG_MONO, 0},
    {TK_OPTION_COLOR, "-activeforeground", "activeForeground", "Background",
	DEF_CHKRAD_ACTIVE_FG_COLOR, -1, Tk_Offset(TkButton, activeFg),
	TK_OPTION_NULL_OK, (ClientData) DEF_BUTTON_ACTIVE_FG_MONO, 0},
    {TK_OPTION_ANCHOR, "-anchor", "anchor", "Anchor",
	DEF_BUTTON_ANCHOR, -1, Tk_Offset(TkButton, anchor), 0, 0, 0},
    {TK_OPTION_BORDER, "-background", "background", "Background",
	DEF_BUTTON_BG_COLOR, -1, Tk_Offset(TkButton, normalBorder),
	0, (ClientData) DEF_BUTTON_BG_MONO, 0},
    {TK_OPTION_SYNONYM, "-bd", (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-borderwidth", 0},
    {TK_OPTION_SYNONYM, "-bg", (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-background", 0},
    {TK_OPTION_BITMAP, "-bitmap", "bitmap", "Bitmap",
	DEF_BUTTON_BITMAP, -1, Tk_Offset(TkButton, bitmap),
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
	DEF_BUTTON_BORDER_WIDTH, Tk_Offset(TkButton, borderWidthPtr),
	Tk_Offset(TkButton, borderWidth), 0, 0, 0},
    {TK_OPTION_STRING, "-command", "command", "Command",
	DEF_BUTTON_COMMAND, Tk_Offset(TkButton, commandPtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING_TABLE, "-compound", "compound", "Compound",
	 DEF_BUTTON_COMPOUND, -1, Tk_Offset(TkButton, compound), 0,
	 (ClientData) compoundStrings, 0},
    {TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor",
	DEF_BUTTON_CURSOR, -1, Tk_Offset(TkButton, cursor),
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_COLOR, "-disabledforeground", "disabledForeground",
	"DisabledForeground", DEF_BUTTON_DISABLED_FG_COLOR,
	-1, Tk_Offset(TkButton, disabledFg), TK_OPTION_NULL_OK,
	(ClientData) DEF_BUTTON_DISABLED_FG_MONO, 0},
    {TK_OPTION_SYNONYM, "-fg", "foreground", (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-foreground", 0},
    {TK_OPTION_FONT, "-font", "font", "Font",
	DEF_BUTTON_FONT, -1, Tk_Offset(TkButton, tkfont), 0, 0, 0},
    {TK_OPTION_COLOR, "-foreground", "foreground", "Foreground",
	DEF_CHKRAD_FG, -1, Tk_Offset(TkButton, normalFg), 0, 0, 0},
    {TK_OPTION_STRING, "-height", "height", "Height",
	DEF_BUTTON_HEIGHT, Tk_Offset(TkButton, heightPtr), -1, 0, 0, 0},
    {TK_OPTION_BORDER, "-highlightbackground", "highlightBackground",
	"HighlightBackground", DEF_BUTTON_HIGHLIGHT_BG_COLOR,
	-1, Tk_Offset(TkButton, highlightBorder), 0,
	(ClientData) DEF_BUTTON_HIGHLIGHT_BG_MONO, 0},
    {TK_OPTION_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
	DEF_BUTTON_HIGHLIGHT, -1, Tk_Offset(TkButton, highlightColorPtr),
	0, 0, 0},
    {TK_OPTION_PIXELS, "-highlightthickness", "highlightThickness",
	"HighlightThickness", DEF_BUTTON_HIGHLIGHT_WIDTH,
	Tk_Offset(TkButton, highlightWidthPtr),
	Tk_Offset(TkButton, highlightWidth), 0, 0, 0},
    {TK_OPTION_STRING, "-image", "image", "Image",
	DEF_BUTTON_IMAGE, Tk_Offset(TkButton, imagePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_BOOLEAN, "-indicatoron", "indicatorOn", "IndicatorOn",
	DEF_BUTTON_INDICATOR, -1, Tk_Offset(TkButton, indicatorOn), 0, 0, 0},
    {TK_OPTION_JUSTIFY, "-justify", "justify", "Justify",
	DEF_BUTTON_JUSTIFY, -1, Tk_Offset(TkButton, justify), 0, 0, 0},
    {TK_OPTION_RELIEF, "-offrelief", "offRelief", "OffRelief",
	 DEF_BUTTON_RELIEF, -1, Tk_Offset(TkButton, offRelief), 0, 0, 0},
    {TK_OPTION_STRING, "-offvalue", "offValue", "Value",
	DEF_BUTTON_OFF_VALUE, Tk_Offset(TkButton, offValuePtr), -1, 0, 0, 0},
    {TK_OPTION_STRING, "-onvalue", "onValue", "Value",
	DEF_BUTTON_ON_VALUE, Tk_Offset(TkButton, onValuePtr), -1, 0, 0, 0},
    {TK_OPTION_RELIEF, "-overrelief", "overRelief", "OverRelief",
	 DEF_BUTTON_OVER_RELIEF, -1, Tk_Offset(TkButton, overRelief),
	 TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_PIXELS, "-padx", "padX", "Pad",
	DEF_LABCHKRAD_PADX, Tk_Offset(TkButton, padXPtr),
	Tk_Offset(TkButton, padX), 0, 0, 0},
    {TK_OPTION_PIXELS, "-pady", "padY", "Pad",
	DEF_LABCHKRAD_PADY, Tk_Offset(TkButton, padYPtr),
	Tk_Offset(TkButton, padY), 0, 0, 0},
    {TK_OPTION_RELIEF, "-relief", "relief", "Relief",
	DEF_LABCHKRAD_RELIEF, -1, Tk_Offset(TkButton, relief), 0, 0, 0},
    {TK_OPTION_BORDER, "-selectcolor", "selectColor", "Background",
	DEF_BUTTON_SELECT_COLOR, -1, Tk_Offset(TkButton, selectBorder),
	TK_OPTION_NULL_OK, (ClientData) DEF_BUTTON_SELECT_MONO, 0},
    {TK_OPTION_STRING, "-selectimage", "selectImage", "SelectImage",
	DEF_BUTTON_SELECT_IMAGE, Tk_Offset(TkButton, selectImagePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING_TABLE, "-state", "state", "State",
	DEF_BUTTON_STATE, -1, Tk_Offset(TkButton, state),
	0, (ClientData) stateStrings, 0},
    {TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus",
	DEF_BUTTON_TAKE_FOCUS, Tk_Offset(TkButton, takeFocusPtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING, "-text", "text", "Text",
	DEF_BUTTON_TEXT, Tk_Offset(TkButton, textPtr), -1, 0, 0, 0},
    {TK_OPTION_STRING, "-textvariable", "textVariable", "Variable",
	DEF_BUTTON_TEXT_VARIABLE, Tk_Offset(TkButton, textVarNamePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_INT, "-underline", "underline", "Underline",
	DEF_BUTTON_UNDERLINE, -1, Tk_Offset(TkButton, underline), 0, 0, 0},
    {TK_OPTION_STRING, "-variable", "variable", "Variable",
	DEF_CHECKBUTTON_VARIABLE, Tk_Offset(TkButton, selVarNamePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING, "-width", "width", "Width",
	DEF_BUTTON_WIDTH, Tk_Offset(TkButton, widthPtr), -1, 0, 0, 0},
    {TK_OPTION_PIXELS, "-wraplength", "wrapLength", "WrapLength",
	DEF_BUTTON_WRAP_LENGTH, Tk_Offset(TkButton, wrapLengthPtr),
	Tk_Offset(TkButton, wrapLength), 0, 0, 0},
    {TK_OPTION_END, (char *) NULL, (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, 0, 0}
};

static Tk_OptionSpec radiobuttonOptionSpecs[] = {
    {TK_OPTION_BORDER, "-activebackground", "activeBackground", "Foreground",
	DEF_BUTTON_ACTIVE_BG_COLOR, -1, Tk_Offset(TkButton, activeBorder),
	0, (ClientData) DEF_BUTTON_ACTIVE_BG_MONO, 0},
    {TK_OPTION_COLOR, "-activeforeground", "activeForeground", "Background",
	DEF_CHKRAD_ACTIVE_FG_COLOR, -1, Tk_Offset(TkButton, activeFg),
	TK_OPTION_NULL_OK, (ClientData) DEF_BUTTON_ACTIVE_FG_MONO, 0},
    {TK_OPTION_ANCHOR, "-anchor", "anchor", "Anchor",
	DEF_BUTTON_ANCHOR, -1, Tk_Offset(TkButton, anchor), 0, 0, 0},
    {TK_OPTION_BORDER, "-background", "background", "Background",
	DEF_BUTTON_BG_COLOR, -1, Tk_Offset(TkButton, normalBorder),
	0, (ClientData) DEF_BUTTON_BG_MONO, 0},
    {TK_OPTION_SYNONYM, "-bd", (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-borderwidth", 0},
    {TK_OPTION_SYNONYM, "-bg", (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-background", 0},
    {TK_OPTION_BITMAP, "-bitmap", "bitmap", "Bitmap",
	DEF_BUTTON_BITMAP, -1, Tk_Offset(TkButton, bitmap),
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
	DEF_BUTTON_BORDER_WIDTH, Tk_Offset(TkButton, borderWidthPtr),
	Tk_Offset(TkButton, borderWidth), 0, 0, 0},
    {TK_OPTION_STRING, "-command", "command", "Command",
	DEF_BUTTON_COMMAND, Tk_Offset(TkButton, commandPtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING_TABLE, "-compound", "compound", "Compound",
	 DEF_BUTTON_COMPOUND, -1, Tk_Offset(TkButton, compound), 0,
	 (ClientData) compoundStrings, 0},
    {TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor",
	DEF_BUTTON_CURSOR, -1, Tk_Offset(TkButton, cursor),
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_COLOR, "-disabledforeground", "disabledForeground",
	"DisabledForeground", DEF_BUTTON_DISABLED_FG_COLOR,
	-1, Tk_Offset(TkButton, disabledFg), TK_OPTION_NULL_OK,
	(ClientData) DEF_BUTTON_DISABLED_FG_MONO, 0},
    {TK_OPTION_SYNONYM, "-fg", "foreground", (char *) NULL,
	(char *) NULL, 0, -1, 0, (ClientData) "-foreground", 0},
    {TK_OPTION_FONT, "-font", "font", "Font",
	DEF_BUTTON_FONT, -1, Tk_Offset(TkButton, tkfont), 0, 0, 0},
    {TK_OPTION_COLOR, "-foreground", "foreground", "Foreground",
	DEF_CHKRAD_FG, -1, Tk_Offset(TkButton, normalFg), 0, 0, 0},
    {TK_OPTION_STRING, "-height", "height", "Height",
	DEF_BUTTON_HEIGHT, Tk_Offset(TkButton, heightPtr), -1, 0, 0, 0},
    {TK_OPTION_BORDER, "-highlightbackground", "highlightBackground",
	"HighlightBackground", DEF_BUTTON_HIGHLIGHT_BG_COLOR,
	-1, Tk_Offset(TkButton, highlightBorder), 0,
	(ClientData) DEF_BUTTON_HIGHLIGHT_BG_MONO, 0},
    {TK_OPTION_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
	DEF_BUTTON_HIGHLIGHT, -1, Tk_Offset(TkButton, highlightColorPtr),
	0, 0, 0},
    {TK_OPTION_PIXELS, "-highlightthickness", "highlightThickness",
	"HighlightThickness", DEF_BUTTON_HIGHLIGHT_WIDTH,
	Tk_Offset(TkButton, highlightWidthPtr),
	Tk_Offset(TkButton, highlightWidth), 0, 0, 0},
    {TK_OPTION_STRING, "-image", "image", "Image",
	DEF_BUTTON_IMAGE, Tk_Offset(TkButton, imagePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_BOOLEAN, "-indicatoron", "indicatorOn", "IndicatorOn",
	DEF_BUTTON_INDICATOR, -1, Tk_Offset(TkButton, indicatorOn),
	0, 0, 0},
    {TK_OPTION_JUSTIFY, "-justify", "justify", "Justify",
	DEF_BUTTON_JUSTIFY, -1, Tk_Offset(TkButton, justify), 0, 0, 0},
    {TK_OPTION_RELIEF, "-offrelief", "offRelief", "OffRelief",
	 DEF_BUTTON_RELIEF, -1, Tk_Offset(TkButton, offRelief), 0, 0, 0},
    {TK_OPTION_RELIEF, "-overrelief", "overRelief", "OverRelief",
	 DEF_BUTTON_OVER_RELIEF, -1, Tk_Offset(TkButton, overRelief),
	 TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_PIXELS, "-padx", "padX", "Pad",
	DEF_LABCHKRAD_PADX, Tk_Offset(TkButton, padXPtr),
	Tk_Offset(TkButton, padX), 0, 0, 0},
    {TK_OPTION_PIXELS, "-pady", "padY", "Pad",
	DEF_LABCHKRAD_PADY, Tk_Offset(TkButton, padYPtr),
	Tk_Offset(TkButton, padY), 0, 0, 0},
    {TK_OPTION_RELIEF, "-relief", "relief", "Relief",
	DEF_LABCHKRAD_RELIEF, -1, Tk_Offset(TkButton, relief), 0, 0, 0},
    {TK_OPTION_BORDER, "-selectcolor", "selectColor", "Background",
	DEF_BUTTON_SELECT_COLOR, -1, Tk_Offset(TkButton, selectBorder),
	TK_OPTION_NULL_OK, (ClientData) DEF_BUTTON_SELECT_MONO, 0},
    {TK_OPTION_STRING, "-selectimage", "selectImage", "SelectImage",
	DEF_BUTTON_SELECT_IMAGE, Tk_Offset(TkButton, selectImagePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING_TABLE, "-state", "state", "State",
	DEF_BUTTON_STATE, -1, Tk_Offset(TkButton, state),
	0, (ClientData) stateStrings, 0},
    {TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus",
	DEF_BUTTON_TAKE_FOCUS, Tk_Offset(TkButton, takeFocusPtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_STRING, "-text", "text", "Text",
	DEF_BUTTON_TEXT, Tk_Offset(TkButton, textPtr), -1, 0, 0, 0},
    {TK_OPTION_STRING, "-textvariable", "textVariable", "Variable",
	DEF_BUTTON_TEXT_VARIABLE, Tk_Offset(TkButton, textVarNamePtr), -1,
	TK_OPTION_NULL_OK, 0, 0},
    {TK_OPTION_INT, "-underline", "underline", "Underline",
	DEF_BUTTON_UNDERLINE, -1, Tk_Offset(TkButton, underline), 0, 0, 0},
    {TK_OPTION_STRING, "-value", "value", "Value",
	DEF_BUTTON_VALUE, Tk_Offset(TkButton, onValuePtr), -1, 0, 0, 0},
    {TK_OPTION_STRING, "-variable", "variable", "Variable",
	DEF_RADIOBUTTON_VARIABLE, Tk_Offset(TkButton, selVarNamePtr), -1,
	0, 0, 0},
    {TK_OPTION_STRING, "-width", "width", "Width",
	DEF_BUTTON_WIDTH, Tk_Offset(TkButton, widthPtr), -1, 0, 0, 0},
    {TK_OPTION_PIXELS, "-wraplength", "wrapLength", "WrapLength",
	DEF_BUTTON_WRAP_LENGTH, Tk_Offset(TkButton, wrapLengthPtr),
	Tk_Offset(TkButton, wrapLength), 0, 0, 0},
    {TK_OPTION_END, (char *) NULL, (char *) NULL, (char *) NULL,
	(char *) NULL, 0, -1, 0, 0, 0}
};

/*
 * The following table maps from one of the type values defined in
 * tkButton.h, such as TYPE_LABEL, to the option template for that
 * class of widgets.
 */

static Tk_OptionSpec *optionSpecs[] = {
    labelOptionSpecs,
    buttonOptionSpecs,
    checkbuttonOptionSpecs,
    radiobuttonOptionSpecs
};

/*
 * The following tables define the widget commands supported by
 * each of the classes, and map the indexes into the string tables
 * into a single enumerated type used to dispatch the widget command.
 */

static CONST char *commandNames[][8] = {
    {"cget", "configure", (char *) NULL},
    {"cget", "configure", "flash", "invoke", (char *) NULL},
    {"cget", "configure", "deselect", "flash", "invoke", "select",
	    "toggle", (char *) NULL},
    {"cget", "configure", "deselect", "flash", "invoke", "select",
	    (char *) NULL}
};
enum command {
    COMMAND_CGET, COMMAND_CONFIGURE, COMMAND_DESELECT, COMMAND_FLASH,
    COMMAND_INVOKE, COMMAND_SELECT, COMMAND_TOGGLE
};
static enum command map[][8] = {
    {COMMAND_CGET, COMMAND_CONFIGURE},
    {COMMAND_CGET, COMMAND_CONFIGURE, COMMAND_FLASH, COMMAND_INVOKE},
    {COMMAND_CGET, COMMAND_CONFIGURE, COMMAND_DESELECT, COMMAND_FLASH,
	    COMMAND_INVOKE, COMMAND_SELECT, COMMAND_TOGGLE},
    {COMMAND_CGET, COMMAND_CONFIGURE, COMMAND_DESELECT, COMMAND_FLASH,
	    COMMAND_INVOKE, COMMAND_SELECT}
};

/*
 * Forward declarations for procedures defined later in this file:
 */

static void		ButtonCmdDeletedProc _ANSI_ARGS_((
			    ClientData clientData));
static int		ButtonCreate _ANSI_ARGS_((ClientData clientData,
			    Tcl_Interp *interp, int objc,
			    Tcl_Obj *CONST objv[], int type));
static void		ButtonEventProc _ANSI_ARGS_((ClientData clientData,
			    XEvent *eventPtr));
static void		ButtonImageProc _ANSI_ARGS_((ClientData clientData,
			    int x, int y, int width, int height,
			    int imgWidth, int imgHeight));
static void		ButtonSelectImageProc _ANSI_ARGS_((
			    ClientData clientData, int x, int y, int width,
			    int height, int imgWidth, int imgHeight));
static char *		ButtonTextVarProc _ANSI_ARGS_((ClientData clientData,
			    Tcl_Interp *interp, CONST char *name1,
			    CONST char *name2, int flags));
static char *		ButtonVarProc _ANSI_ARGS_((ClientData clientData,
			    Tcl_Interp *interp, CONST char *name1,
			    CONST char *name2, int flags));
static int		ButtonWidgetObjCmd _ANSI_ARGS_((ClientData clientData,
			    Tcl_Interp *interp, int objc,
			    Tcl_Obj *CONST objv[]));
static int		ConfigureButton _ANSI_ARGS_((Tcl_Interp *interp,
			    TkButton *butPtr, int objc,
			    Tcl_Obj *CONST objv[]));
static void		DestroyButton _ANSI_ARGS_((TkButton *butPtr));

/*
 *--------------------------------------------------------------
 *
 * Tk_ButtonCmd, Tk_CheckbuttonCmd, Tk_LabelCmd, Tk_RadiobuttonCmd --
 *
 *	These procedures are invoked to process the "button", "label",
 *	"radiobutton", and "checkbutton" Tcl commands.  See the
 *	user documentation for details on what they do.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	See the user documentation.  These procedures are just wrappers;
 *	they call ButtonCreate to do all of the real work.
 *
 *--------------------------------------------------------------
 */

int
Tk_ButtonObjCmd(clientData, interp, objc, objv)
    ClientData clientData;	/* Either NULL or pointer to option table. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument values. */
{
    return ButtonCreate(clientData, interp, objc, objv, TYPE_BUTTON);
}

int
Tk_CheckbuttonObjCmd(clientData, interp, objc, objv)
    ClientData clientData;	/* Either NULL or pointer to option table. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument values. */
{
    return ButtonCreate(clientData, interp, objc, objv, TYPE_CHECK_BUTTON);
}

int
Tk_LabelObjCmd(clientData, interp, objc, objv)
    ClientData clientData;	/* Either NULL or pointer to option table. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument values. */
{
    return ButtonCreate(clientData, interp, objc, objv, TYPE_LABEL);
}

int
Tk_RadiobuttonObjCmd(clientData, interp, objc, objv)
    ClientData clientData;	/* Either NULL or pointer to option table. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument values. */
{
    return ButtonCreate(clientData, interp, objc, objv, TYPE_RADIO_BUTTON);
}

/*
 *--------------------------------------------------------------
 *
 * ButtonCreate --
 *
 *	This procedure does all the real work of implementing the
 *	"button", "label", "radiobutton", and "checkbutton" Tcl
 *	commands.  See the user documentation for details on what it does.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *--------------------------------------------------------------
 */

static int
ButtonCreate(clientData, interp, objc, objv, type)
    ClientData clientData;	/* NULL. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument values. */
    int type;			/* Type of button to create: TYPE_LABEL,
				 * TYPE_BUTTON, TYPE_CHECK_BUTTON, or
				 * TYPE_RADIO_BUTTON. */
{
    TkButton *butPtr;
    Tk_OptionTable optionTable;
    Tk_Window tkwin;
    ThreadSpecificData *tsdPtr = (ThreadSpecificData *) 
	Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData));

    if (!tsdPtr->defaultsInitialized) {
	TkpButtonSetDefaults(optionSpecs[type]);
	tsdPtr->defaultsInitialized = 1;
    }

    if (objc < 2) {
	Tcl_WrongNumArgs(interp, 1, objv, "pathName ?options?");
	return TCL_ERROR;
    }

    /*
     * Create the new window.
     */

    tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp),
	    Tcl_GetString(objv[1]), (char *) NULL);
    if (tkwin == NULL) {
	return TCL_ERROR;
    }

    /*
     * Create the option table for this widget class.  If it has already
     * been created, the cached pointer will be returned.
     */

    optionTable = Tk_CreateOptionTable(interp, optionSpecs[type]);

    Tk_SetClass(tkwin, classNames[type]);
    butPtr = TkpCreateButton(tkwin);

    Tk_SetClassProcs(tkwin, &tkpButtonProcs, (ClientData) butPtr);

    /*
     * Initialize the data structure for the button.
     */

    butPtr->tkwin = tkwin;
    butPtr->display = Tk_Display(tkwin);
    butPtr->interp = interp;
    butPtr->widgetCmd = Tcl_CreateObjCommand(interp, Tk_PathName(tkwin),
	    ButtonWidgetObjCmd, (ClientData) butPtr, ButtonCmdDeletedProc);
    butPtr->type = type;
    butPtr->optionTable = optionTable;
    butPtr->textPtr = NULL;
    butPtr->underline = -1;
    butPtr->textVarNamePtr = NULL;
    butPtr->bitmap = None;
    butPtr->imagePtr = NULL;
    butPtr->image = NULL;
    butPtr->selectImagePtr = NULL;
    butPtr->selectImage = NULL;
    butPtr->state = STATE_NORMAL;
    butPtr->normalBorder = NULL;
    butPtr->activeBorder = NULL;
    butPtr->borderWidthPtr = NULL;
    butPtr->borderWidth = 0;
    butPtr->relief = TK_RELIEF_FLAT;
    butPtr->highlightWidthPtr = NULL;
    butPtr->highlightWidth = 0;
    butPtr->highlightBorder = NULL;
    butPtr->highlightColorPtr = NULL;
    butPtr->inset = 0;
    butPtr->tkfont = NULL;
    butPtr->normalFg = NULL;
    butPtr->activeFg = NULL;
    butPtr->disabledFg = NULL;
    butPtr->normalTextGC = None;
    butPtr->activeTextGC = None;
    butPtr->disabledGC = None;
    butPtr->gray = None;
    butPtr->copyGC = None;
    butPtr->widthPtr = NULL;
    butPtr->width = 0;
    butPtr->heightPtr = NULL;
    butPtr->height = 0;
    butPtr->wrapLengthPtr = NULL;
    butPtr->wrapLength = 0;
    butPtr->padXPtr = NULL;
    butPtr->padX = 0;
    butPtr->padYPtr = NULL;
    butPtr->padY = 0;
    butPtr->anchor = TK_ANCHOR_CENTER;
    butPtr->justify = TK_JUSTIFY_CENTER;
    butPtr->indicatorOn = 0;
    butPtr->selectBorder = NULL;
    butPtr->textWidth = 0;
    butPtr->textHeight = 0;
    butPtr->textLayout = NULL;
    butPtr->indicatorSpace = 0;
    butPtr->indicatorDiameter = 0;
    butPtr->defaultState = DEFAULT_DISABLED;
    butPtr->selVarNamePtr = NULL;
    butPtr->onValuePtr = NULL;
    butPtr->offValuePtr = NULL;
    butPtr->cursor = None;
    butPtr->takeFocusPtr = NULL;
    butPtr->commandPtr = NULL;
    butPtr->flags = 0;

    Tk_CreateEventHandler(butPtr->tkwin,
	    ExposureMask|StructureNotifyMask|FocusChangeMask,
	    ButtonEventProc, (ClientData) butPtr);

    if (Tk_InitOptions(interp, (char *) butPtr, optionTable, tkwin)
	    != TCL_OK) {
	Tk_DestroyWindow(butPtr->tkwin);
	return TCL_ERROR;
    }
    if (ConfigureButton(interp, butPtr, objc - 2, objv + 2) != TCL_OK) {
	Tk_DestroyWindow(butPtr->tkwin);
	return TCL_ERROR;
    }

    Tcl_SetStringObj(Tcl_GetObjResult(interp), Tk_PathName(butPtr->tkwin),
	    -1);
    return TCL_OK;
}

/*
 *--------------------------------------------------------------
 *
 * ButtonWidgetCmd --
 *
 *	This procedure is invoked to process the Tcl command
 *	that corresponds to a widget managed by this module.
 *	See the user documentation for details on what it does.
 *
 * Results:
 *	A standard Tcl result.
 *
 * Side effects:
 *	See the user documentation.
 *
 *--------------------------------------------------------------
 */

static int
ButtonWidgetObjCmd(clientData, interp, objc, objv)
    ClientData clientData;	/* Information about button widget. */
    Tcl_Interp *interp;		/* Current interpreter. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument values. */
{
    TkButton *butPtr = (TkButton *) clientData;
    int index;
    int result;
    Tcl_Obj *objPtr;

    if (objc < 2) {
        Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?");
	return TCL_ERROR;
    }
    result = Tcl_GetIndexFromObj(interp, objv[1], commandNames[butPtr->type],
	    "option", 0, &index);
    if (result != TCL_OK) {
	return result;
    }
    Tcl_Preserve((ClientData) butPtr);

    switch (map[butPtr->type][index]) {
	case COMMAND_CGET: {
	    if (objc != 3) {
		Tcl_WrongNumArgs(interp, 1, objv, "cget option");
		goto error;
	    }
	    objPtr = Tk_GetOptionValue(interp, (char *) butPtr,
		    butPtr->optionTable, objv[2], butPtr->tkwin);
	    if (objPtr == NULL) {
		 goto error;
	    } else {
		Tcl_SetObjResult(interp, objPtr);
	    }
	    break;
	}

	case COMMAND_CONFIGURE: {
	    if (objc <= 3) {
		objPtr = Tk_GetOptionInfo(interp, (char *) butPtr,
			butPtr->optionTable,
			(objc == 3) ? objv[2] : (Tcl_Obj *) NULL,
			butPtr->tkwin);
		if (objPtr == NULL) {
		    goto error;
		} else {
		    Tcl_SetObjResult(interp, objPtr);
		}
	    } else {
		result = ConfigureButton(interp, butPtr, objc-2, objv+2);
	    }
	    break;
	}

	case COMMAND_DESELECT: {
	    if (objc > 2) {
		Tcl_WrongNumArgs(interp, 1, objv, "deselect");
		goto error;
	    }
	    if (butPtr->type == TYPE_CHECK_BUTTON) {
		if (Tcl_ObjSetVar2(interp, butPtr->selVarNamePtr, NULL,
			butPtr->offValuePtr, TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG)
			== NULL) {
		    goto error;
		}
	    } else if (butPtr->flags & SELECTED) {
		if (Tcl_ObjSetVar2(interp,
			butPtr->selVarNamePtr, NULL, Tcl_NewObj(),
			TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG)
			== NULL) {
		    goto error;
		}
	    }
	    break;
	}

	case COMMAND_FLASH: {
	    int i;

	    if (objc > 2) {
		Tcl_WrongNumArgs(interp, 1, objv, "flash");
		goto error;
	    }
	    if (butPtr->state != STATE_DISABLED) {
		for (i = 0; i < 4; i++) {
		    if (butPtr->state == STATE_NORMAL) {
			butPtr->state = STATE_ACTIVE; 
			Tk_SetBackgroundFromBorder(butPtr->tkwin,
				butPtr->activeBorder);
		    } else {
			butPtr->state = STATE_NORMAL; 
			Tk_SetBackgroundFromBorder(butPtr->tkwin,
				butPtr->normalBorder);
		    }
		    TkpDisplayButton((ClientData) butPtr);
    
		    /*
		     * Special note: must cancel any existing idle handler
		     * for TkpDisplayButton;  it's no longer needed, and
		     * TkpDisplayButton cleared the REDRAW_PENDING flag.
		     */
    
		    Tcl_CancelIdleCall(TkpDisplayButton, (ClientData) butPtr);
		    XFlush(butPtr->display);
		    Tcl_Sleep(50);
		}
	    }
	    break;
	}

	case COMMAND_INVOKE: {
	    if (objc > 2) {
		Tcl_WrongNumArgs(interp, 1, objv, "invoke");
		goto error;
	    }
	    if (butPtr->state != STATE_DISABLED) {
		result = TkInvokeButton(butPtr);
	    }
	    break;
	}

	case COMMAND_SELECT: {
	    if (objc > 2) {
		Tcl_WrongNumArgs(interp, 1, objv, "select");
		goto error;
	    }
	    if (Tcl_ObjSetVar2(interp, butPtr->selVarNamePtr, NULL,
		    butPtr->onValuePtr, TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG)
		    == NULL) {
		goto error;
	    }
	    break;
	}

	case COMMAND_TOGGLE: {
	    if (objc > 2) {
		Tcl_WrongNumArgs(interp, 1, objv, "toggle");
		goto error;
	    }
	    if (Tcl_ObjSetVar2(interp, butPtr->selVarNamePtr, NULL,
		    (butPtr->flags & SELECTED) ? butPtr->offValuePtr
		    : butPtr->onValuePtr,
		    TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG)
		    == NULL) {
		goto error;
	    }
	    break;
	}
    }
    Tcl_Release((ClientData) butPtr);
    return result;

    error:
    Tcl_Release((ClientData) butPtr);
    return TCL_ERROR;
}

/*
 *----------------------------------------------------------------------
 *
 * DestroyButton --
 *
 *	This procedure is invoked by ButtonEventProc to free all the
 *	resources of a button and clean up its state.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Everything associated with the widget is freed.
 *
 *----------------------------------------------------------------------
 */

static void
DestroyButton(butPtr)
    TkButton *butPtr;		/* Info about button widget. */
{
    butPtr->flags |= BUTTON_DELETED;
    TkpDestroyButton(butPtr);

    if (butPtr->flags & REDRAW_PENDING) {
	Tcl_CancelIdleCall(TkpDisplayButton, (ClientData) butPtr);
    }

    /*
     * Free up all the stuff that requires special handling, then
     * let Tk_FreeOptions handle all the standard option-related
     * stuff.
     */

    Tcl_DeleteCommandFromToken(butPtr->interp, butPtr->widgetCmd);
    if (butPtr->textVarNamePtr != NULL) {
	Tcl_UntraceVar(butPtr->interp, Tcl_GetString(butPtr->textVarNamePtr),
		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		ButtonTextVarProc, (ClientData) butPtr);
    }
    if (butPtr->image != NULL) {
	Tk_FreeImage(butPtr->image);
    }
    if (butPtr->selectImage != NULL) {
	Tk_FreeImage(butPtr->selectImage);
    }
    if (butPtr->normalTextGC != None) {
	Tk_FreeGC(butPtr->display, butPtr->normalTextGC);
    }
    if (butPtr->activeTextGC != None) {
	Tk_FreeGC(butPtr->display, butPtr->activeTextGC);
    }
    if (butPtr->disabledGC != None) {
	Tk_FreeGC(butPtr->display, butPtr->disabledGC);
    }
    if (butPtr->gray != None) {
	Tk_FreeBitmap(butPtr->display, butPtr->gray);
    }
    if (butPtr->copyGC != None) {
	Tk_FreeGC(butPtr->display, butPtr->copyGC);
    }
    if (butPtr->textLayout != NULL) {
	Tk_FreeTextLayout(butPtr->textLayout);
    }
    if (butPtr->selVarNamePtr != NULL) {
	Tcl_UntraceVar(butPtr->interp, Tcl_GetString(butPtr->selVarNamePtr),
		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		ButtonVarProc, (ClientData) butPtr);
    }
    Tk_FreeConfigOptions((char *) butPtr, butPtr->optionTable,
	    butPtr->tkwin);
    butPtr->tkwin = NULL;
    Tcl_EventuallyFree((ClientData) butPtr, TCL_DYNAMIC);
}

/*
 *----------------------------------------------------------------------
 *
 * ConfigureButton --
 *
 *	This procedure is called to process an objc/objv list to set
 *	configuration options for a button widget.
 *
 * Results:
 *	The return value is a standard Tcl result.  If TCL_ERROR is
 *	returned, then an error message is left in interp's result.
 *
 * Side effects:
 *	Configuration information, such as text string, colors, font,
 *	etc. get set for butPtr;  old resources get freed, if there
 *	were any.  The button is redisplayed.
 *
 *----------------------------------------------------------------------
 */

static int
ConfigureButton(interp, butPtr, objc, objv)
    Tcl_Interp *interp;		/* Used for error reporting. */
    register TkButton *butPtr;	/* Information about widget;  may or may
				 * not already have values for some fields. */
    int objc;			/* Number of arguments. */
    Tcl_Obj *CONST objv[];	/* Argument values. */
{
    Tk_SavedOptions savedOptions;
    Tcl_Obj *errorResult = NULL;
    int error, haveImage;
    Tk_Image image;

    /*
     * Eliminate any existing trace on variables monitored by the button.
     */

    if (butPtr->textVarNamePtr != NULL) {
	Tcl_UntraceVar(interp, Tcl_GetString(butPtr->textVarNamePtr), 
		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		ButtonTextVarProc, (ClientData) butPtr);
    }
    if (butPtr->selVarNamePtr != NULL) {
	Tcl_UntraceVar(interp, Tcl_GetString(butPtr->selVarNamePtr), 
		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		ButtonVarProc, (ClientData) butPtr);
    }

    /*
     * The following loop is potentially executed twice.  During the
     * first pass configuration options get set to their new values.
     * If there is an error in this pass, we execute a second pass
     * to restore all the options to their previous values.
     */

    for (error = 0; error <= 1; error++) {
	if (!error) {
	    /*
	     * First pass: set options to new values.
	     */

	    if (Tk_SetOptions(interp, (char *) butPtr,
		    butPtr->optionTable, objc, objv,
		    butPtr->tkwin, &savedOptions, (int *) NULL) != TCL_OK) {
		continue;
	    }
	} else {
	    /*
	     * Second pass: restore options to old values.
	     */

	    errorResult = Tcl_GetObjResult(interp);
	    Tcl_IncrRefCount(errorResult);
	    Tk_RestoreSavedOptions(&savedOptions);
	}

	/*
	 * A few options need special processing, such as setting the
	 * background from a 3-D border, or filling in complicated
	 * defaults that couldn't be specified to Tk_SetOptions.
	 */

	if ((butPtr->state == STATE_ACTIVE)
		&& !Tk_StrictMotif(butPtr->tkwin)) {
	    Tk_SetBackgroundFromBorder(butPtr->tkwin, butPtr->activeBorder);
	} else {
	    Tk_SetBackgroundFromBorder(butPtr->tkwin, butPtr->normalBorder);
	}
	if (butPtr->borderWidth < 0) {
	    butPtr->borderWidth = 0;
	}
	if (butPtr->highlightWidth < 0) {
	    butPtr->highlightWidth = 0;
	}
	if (butPtr->padX < 0) {
	    butPtr->padX = 0;
	}
	if (butPtr->padY < 0) {
	    butPtr->padY = 0;
	}

	if (butPtr->type >= TYPE_CHECK_BUTTON) {
	    Tcl_Obj *valuePtr, *namePtr;
    
	    if (butPtr->selVarNamePtr == NULL) {
		butPtr->selVarNamePtr = Tcl_NewStringObj(
			Tk_Name(butPtr->tkwin), -1);
		Tcl_IncrRefCount(butPtr->selVarNamePtr);
	    }
	    namePtr = butPtr->selVarNamePtr;
    
	    /*
	     * Select the button if the associated variable has the
	     * appropriate value, initialize the variable if it doesn't
	     * exist, then set a trace on the variable to monitor future
	     * changes to its value.
	     */
    
	    valuePtr = Tcl_ObjGetVar2(interp, namePtr, NULL, TCL_GLOBAL_ONLY);
	    butPtr->flags &= ~SELECTED;
	    if (valuePtr != NULL) {
		if (strcmp(Tcl_GetString(valuePtr),
			Tcl_GetString(butPtr->onValuePtr)) == 0) {
		    butPtr->flags |= SELECTED;
		}
	    } else {
		if (Tcl_ObjSetVar2(interp, namePtr, NULL,
			(butPtr->type == TYPE_CHECK_BUTTON)
			? butPtr->offValuePtr : Tcl_NewObj(),
			TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG)
			== NULL) {
		    continue;
		}

		/*
		 * If a radiobutton has the empty string as value
		 * it should be selected.
		 */

 		if ((butPtr->type == TYPE_RADIO_BUTTON) &&
			(*Tcl_GetString(butPtr->onValuePtr) == 0)) {
		    butPtr->flags |= SELECTED;
		}
	    }
	}

	/*
	 * Get the images for the widget, if there are any.  Allocate the
	 * new images before freeing the old ones, so that the reference
	 * counts don't go to zero and cause image data to be discarded.
	 */
    
	if (butPtr->imagePtr != NULL) {
	    image = Tk_GetImage(butPtr->interp, butPtr->tkwin,
		    Tcl_GetString(butPtr->imagePtr), ButtonImageProc,
		    (ClientData) butPtr);
	    if (image == NULL) {
		continue;
	    }
	} else {
	    image = NULL;
	}
	if (butPtr->image != NULL) {
	    Tk_FreeImage(butPtr->image);
	}
	butPtr->image = image;
	if (butPtr->selectImagePtr != NULL) {
	    image = Tk_GetImage(butPtr->interp, butPtr->tkwin,
		    Tcl_GetString(butPtr->selectImagePtr),
		    ButtonSelectImageProc, (ClientData) butPtr);
	    if (image == NULL) {
		continue;
	    }
	} else {
	    image = NULL;
	}
	if (butPtr->selectImage != NULL) {
	    Tk_FreeImage(butPtr->selectImage);
	}
	butPtr->selectImage = image;

	haveImage = 0;
	if (butPtr->imagePtr != NULL || butPtr->bitmap != None) {
	    haveImage = 1;
	}
	if ((!haveImage || butPtr->compound != COMPOUND_NONE)
		&& (butPtr->textVarNamePtr != NULL)) {
	    /*
	     * The button must display the value of a variable: set up a trace
	     * on the variable's value, create the variable if it doesn't
	     * exist, and fetch its current value.
	     */
    
	    Tcl_Obj *valuePtr, *namePtr;

	    namePtr = butPtr->textVarNamePtr;
	    valuePtr = Tcl_ObjGetVar2(interp, namePtr, NULL, TCL_GLOBAL_ONLY);
	    if (valuePtr == NULL) {
		if (Tcl_ObjSetVar2(interp, namePtr, NULL, butPtr->textPtr,
			TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG)
			== NULL) {
		    continue;
		}
	    } else {
		if (butPtr->textPtr != NULL) {
		    Tcl_DecrRefCount(butPtr->textPtr);
		}
		butPtr->textPtr = valuePtr;
		Tcl_IncrRefCount(butPtr->textPtr);
	    }
	}
    
	if ((butPtr->bitmap != None) || (butPtr->imagePtr != NULL)) {
	    /*
	     * The button must display the contents of an image or
	     * bitmap.
	     */

	    if (Tk_GetPixelsFromObj(interp, butPtr->tkwin, butPtr->widthPtr,
		    &butPtr->width) != TCL_OK) {
		widthError:
		Tcl_AddErrorInfo(interp, "\n    (processing -width option)");
		continue;
	    }
	    if (Tk_GetPixelsFromObj(interp, butPtr->tkwin, butPtr->heightPtr,
		    &butPtr->height) != TCL_OK) {
		heightError:
		Tcl_AddErrorInfo(interp, "\n    (processing -height option)");
		continue;
	    }
	} else {
	    /*
	     * The button displays an ordinary text string.
	     */

	    if (Tcl_GetIntFromObj(interp, butPtr->widthPtr, &butPtr->width)
		    != TCL_OK) {
		goto widthError;
	    }
	    if (Tcl_GetIntFromObj(interp, butPtr->heightPtr, &butPtr->height)
		    != TCL_OK) {
		goto heightError;
	    }
	}
	break;
    }
    if (!error) {
	Tk_FreeSavedOptions(&savedOptions);
    }

    /*
     * Reestablish the variable traces, if they're needed.
     */

    if (butPtr->textVarNamePtr != NULL) {
	Tcl_TraceVar(interp, Tcl_GetString(butPtr->textVarNamePtr),
		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		ButtonTextVarProc, (ClientData) butPtr);
    }
    if (butPtr->selVarNamePtr != NULL) {
	Tcl_TraceVar(interp, Tcl_GetString(butPtr->selVarNamePtr),
		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		ButtonVarProc, (ClientData) butPtr);
    }
    
    TkButtonWorldChanged((ClientData) butPtr);
    if (error) {
	Tcl_SetObjResult(interp, errorResult);
	Tcl_DecrRefCount(errorResult);
	return TCL_ERROR;
    } else {
	return TCL_OK;
    }
}

/*
 *---------------------------------------------------------------------------
 *
 * TkButtonWorldChanged --
 *
 *      This procedure is called when the world has changed in some
 *      way and the widget needs to recompute all its graphics contexts
 *	and determine its new geometry.
 *
 * Results:
 *      None.
 *
 * Side effects:
 *      Button will be relayed out and redisplayed.
 *
 *---------------------------------------------------------------------------
 */
 
void
TkButtonWorldChanged(instanceData)
    ClientData instanceData;	/* Information about widget. */
{
    XGCValues gcValues;
    GC newGC;
    unsigned long mask;
    TkButton *butPtr;

    butPtr = (TkButton *) instanceData;

    /*
     * Recompute GCs.
     */

    gcValues.font = Tk_FontId(butPtr->tkfont);
    gcValues.foreground = butPtr->normalFg->pixel;
    gcValues.background = Tk_3DBorderColor(butPtr->normalBorder)->pixel;
    
    /*
     * Note: GraphicsExpose events are disabled in normalTextGC because it's
     * used to copy stuff from an off-screen pixmap onto the screen (we know
     * that there's no problem with obscured areas).
     */

    gcValues.graphics_exposures = False;
    mask = GCForeground | GCBackground | GCFont | GCGraphicsExposures;
    newGC = Tk_GetGC(butPtr->tkwin, mask, &gcValues);
    if (butPtr->normalTextGC != None) {
	Tk_FreeGC(butPtr->display, butPtr->normalTextGC);
    }
    butPtr->normalTextGC = newGC;

    if (butPtr->activeFg != NULL) {
	gcValues.foreground = butPtr->activeFg->pixel;
	gcValues.background = Tk_3DBorderColor(butPtr->activeBorder)->pixel;
	mask = GCForeground | GCBackground | GCFont;
	newGC = Tk_GetGC(butPtr->tkwin, mask, &gcValues);
	if (butPtr->activeTextGC != None) {
	    Tk_FreeGC(butPtr->display, butPtr->activeTextGC);
	}
	butPtr->activeTextGC = newGC;
    }

    /*
     * Allocate the disabled graphics context, for drawing the widget in
     * its disabled state
     */
    gcValues.background = Tk_3DBorderColor(butPtr->normalBorder)->pixel;
    if ((butPtr->disabledFg != NULL) && (butPtr->imagePtr == NULL)) {
	gcValues.foreground = butPtr->disabledFg->pixel;
	mask = GCForeground | GCBackground | GCFont;
    } else {
	gcValues.foreground = gcValues.background;
	mask = GCForeground;
	if (butPtr->compound != COMPOUND_NONE) {
	    mask |= GCFont;
	}
	if (butPtr->gray == None) {
	    butPtr->gray = Tk_GetBitmap(NULL, butPtr->tkwin, "gray50");
	}
	if (butPtr->gray != None) {
	    gcValues.fill_style = FillStippled;
	    gcValues.stipple = butPtr->gray;
	    mask |= GCFillStyle | GCStipple;
	}
    }
    newGC = Tk_GetGC(butPtr->tkwin, mask, &gcValues);
    if (butPtr->disabledGC != None) {
	Tk_FreeGC(butPtr->display, butPtr->disabledGC);
    }
    butPtr->disabledGC = newGC;

    if (butPtr->copyGC == None) {
	butPtr->copyGC = Tk_GetGC(butPtr->tkwin, 0, &gcValues);
    }

    TkpComputeButtonGeometry(butPtr);

    /*
     * Lastly, arrange for the button to be redisplayed.
     */

    if (Tk_IsMapped(butPtr->tkwin) && !(butPtr->flags & REDRAW_PENDING)) {
	Tcl_DoWhenIdle(TkpDisplayButton, (ClientData) butPtr);
	butPtr->flags |= REDRAW_PENDING;
    }
}

/*
 *--------------------------------------------------------------
 *
 * ButtonEventProc --
 *
 *	This procedure is invoked by the Tk dispatcher for various
 *	events on buttons.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	When the window gets deleted, internal structures get
 *	cleaned up.  When it gets exposed, it is redisplayed.
 *
 *--------------------------------------------------------------
 */

static void
ButtonEventProc(clientData, eventPtr)
    ClientData clientData;	/* Information about window. */
    XEvent *eventPtr;		/* Information about event. */
{
    TkButton *butPtr = (TkButton *) clientData;
    if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
	goto redraw;
    } else if (eventPtr->type == ConfigureNotify) {
	/*
	 * Must redraw after size changes, since layout could have changed
	 * and borders will need to be redrawn.
	 */

	goto redraw;
    } else if (eventPtr->type == DestroyNotify) {
	DestroyButton(butPtr);
    } else if (eventPtr->type == FocusIn) {
	if (eventPtr->xfocus.detail != NotifyInferior) {
	    butPtr->flags |= GOT_FOCUS;
	    if (butPtr->highlightWidth > 0) {
		goto redraw;
	    }
	}
    } else if (eventPtr->type == FocusOut) {
	if (eventPtr->xfocus.detail != NotifyInferior) {
	    butPtr->flags &= ~GOT_FOCUS;
	    if (butPtr->highlightWidth > 0) {
		goto redraw;
	    }
	}
    }
    return;

    redraw:
    if ((butPtr->tkwin != NULL) && !(butPtr->flags & REDRAW_PENDING)) {
	Tcl_DoWhenIdle(TkpDisplayButton, (ClientData) butPtr);
	butPtr->flags |= REDRAW_PENDING;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * ButtonCmdDeletedProc --
 *
 *	This procedure is invoked when a widget command is deleted.  If
 *	the widget isn't already in the process of being destroyed,
 *	this command destroys it.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	The widget is destroyed.
 *
 *----------------------------------------------------------------------
 */

static void
ButtonCmdDeletedProc(clientData)
    ClientData clientData;	/* Pointer to widget record for widget. */
{
    TkButton *butPtr = (TkButton *) clientData;

    /*
     * This procedure could be invoked either because the window was
     * destroyed and the command was then deleted or because the command
     * was deleted, and then this procedure destroys the widget.  The
     * BUTTON_DELETED flag distinguishes these cases.
     */

    if (!(butPtr->flags & BUTTON_DELETED)) {
	Tk_DestroyWindow(butPtr->tkwin);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkInvokeButton --
 *
 *	This procedure is called to carry out the actions associated
 *	with a button, such as invoking a Tcl command or setting a
 *	variable.  This procedure is invoked, for example, when the
 *	button is invoked via the mouse.
 *
 * Results:
 *	A standard Tcl return value.  Information is also left in
 *	the interp's result.
 *
 * Side effects:
 *	Depends on the button and its associated command.
 *
 *----------------------------------------------------------------------
 */

int
TkInvokeButton(butPtr)
    TkButton *butPtr;			/* Information about button. */
{
    Tcl_Obj *namePtr = butPtr->selVarNamePtr;

    if (butPtr->type == TYPE_CHECK_BUTTON) {
	if (butPtr->flags & SELECTED) {
	    if (Tcl_ObjSetVar2(butPtr->interp, namePtr, NULL,
		    butPtr->offValuePtr, TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG)
		    == NULL) {
		return TCL_ERROR;
	    }
	} else {
	    if (Tcl_ObjSetVar2(butPtr->interp, namePtr, NULL,
		    butPtr->onValuePtr, TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG)
		    == NULL) {
		return TCL_ERROR;
	    }
	}
    } else if (butPtr->type == TYPE_RADIO_BUTTON) {
	if (Tcl_ObjSetVar2(butPtr->interp, namePtr, NULL, butPtr->onValuePtr,
		TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG)
		== NULL) {
	    return TCL_ERROR;
	}
    }
    if ((butPtr->type != TYPE_LABEL) && (butPtr->commandPtr != NULL)) {
	return Tcl_EvalObjEx(butPtr->interp, butPtr->commandPtr,
		TCL_EVAL_GLOBAL);
    }
    return TCL_OK;
}

/*
 *--------------------------------------------------------------
 *
 * ButtonVarProc --
 *
 *	This procedure is invoked when someone changes the
 *	state variable associated with a radio button.  Depending
 *	on the new value of the button's variable, the button
 *	may be selected or deselected.
 *
 * Results:
 *	NULL is always returned.
 *
 * Side effects:
 *	The button may become selected or deselected.
 *
 *--------------------------------------------------------------
 */

	/* ARGSUSED */
static char *
ButtonVarProc(clientData, interp, name1, name2, flags)
    ClientData clientData;	/* Information about button. */
    Tcl_Interp *interp;		/* Interpreter containing variable. */
    CONST char *name1;		/* Name of variable. */
    CONST char *name2;		/* Second part of variable name. */
    int flags;			/* Information about what happened. */
{
    register TkButton *butPtr = (TkButton *) clientData;
    char *name, *value;
    Tcl_Obj *valuePtr;

    name = Tcl_GetString(butPtr->selVarNamePtr);

    /*
     * If the variable is being unset, then just re-establish the
     * trace unless the whole interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	butPtr->flags &= ~SELECTED;
	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {
	    Tcl_TraceVar(interp, name,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ButtonVarProc, clientData);
	}
	goto redisplay;
    }

    /*
     * Use the value of the variable to update the selected status of
     * the button.
     */

    valuePtr = Tcl_GetVar2Ex(interp, name, NULL, TCL_GLOBAL_ONLY);
    if (valuePtr == NULL) {
	value = "";
    } else {
	value = Tcl_GetString(valuePtr);
    }
    if (strcmp(value, Tcl_GetString(butPtr->onValuePtr)) == 0) {
	if (butPtr->flags & SELECTED) {
	    return (char *) NULL;
	}
	butPtr->flags |= SELECTED;
    } else if (butPtr->flags & SELECTED) {
	butPtr->flags &= ~SELECTED;
    } else {
	return (char *) NULL;
    }

    redisplay:
    if ((butPtr->tkwin != NULL) && Tk_IsMapped(butPtr->tkwin)
	    && !(butPtr->flags & REDRAW_PENDING)) {
	Tcl_DoWhenIdle(TkpDisplayButton, (ClientData) butPtr);
	butPtr->flags |= REDRAW_PENDING;
    }
    return (char *) NULL;
}

/*
 *--------------------------------------------------------------
 *
 * ButtonTextVarProc --
 *
 *	This procedure is invoked when someone changes the variable
 *	whose contents are to be displayed in a button.
 *
 * Results:
 *	NULL is always returned.
 *
 * Side effects:
 *	The text displayed in the button will change to match the
 *	variable.
 *
 *--------------------------------------------------------------
 */

	/* ARGSUSED */
static char *
ButtonTextVarProc(clientData, interp, name1, name2, flags)
    ClientData clientData;	/* Information about button. */
    Tcl_Interp *interp;		/* Interpreter containing variable. */
    CONST char *name1;		/* Not used. */
    CONST char *name2;		/* Not used. */
    int flags;			/* Information about what happened. */
{
    TkButton *butPtr = (TkButton *) clientData;
    char *name;
    Tcl_Obj *valuePtr;

    if (butPtr->flags & BUTTON_DELETED) {
	return (char *) NULL;
    }

    name = Tcl_GetString(butPtr->textVarNamePtr);

    /*
     * If the variable is unset, then immediately recreate it unless
     * the whole interpreter is going away.
     */

    if (flags & TCL_TRACE_UNSETS) {
	if ((flags & TCL_TRACE_DESTROYED) && !(flags & TCL_INTERP_DESTROYED)) {
	    Tcl_SetVar2Ex(interp, name, NULL, butPtr->textPtr, 
		    TCL_GLOBAL_ONLY);
	    Tcl_TraceVar(interp, name,
		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
		    ButtonTextVarProc, clientData);
	}
	return (char *) NULL;
    }

    valuePtr = Tcl_GetVar2Ex(interp, name, NULL, TCL_GLOBAL_ONLY);
    if (valuePtr == NULL) {
	valuePtr = Tcl_NewObj();
    }
    Tcl_DecrRefCount(butPtr->textPtr);
    butPtr->textPtr = valuePtr;
    Tcl_IncrRefCount(butPtr->textPtr);
    TkpComputeButtonGeometry(butPtr);

    if ((butPtr->tkwin != NULL) && Tk_IsMapped(butPtr->tkwin)
	    && !(butPtr->flags & REDRAW_PENDING)) {
	Tcl_DoWhenIdle(TkpDisplayButton, (ClientData) butPtr);
	butPtr->flags |= REDRAW_PENDING;
    }
    return (char *) NULL;
}

/*
 *----------------------------------------------------------------------
 *
 * ButtonImageProc --
 *
 *	This procedure is invoked by the image code whenever the manager
 *	for an image does something that affects the size or contents
 *	of an image displayed in a button.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Arranges for the button to get redisplayed.
 *
 *----------------------------------------------------------------------
 */

static void
ButtonImageProc(clientData, x, y, width, height, imgWidth, imgHeight)
    ClientData clientData;		/* Pointer to widget record. */
    int x, y;				/* Upper left pixel (within image)
					 * that must be redisplayed. */
    int width, height;			/* Dimensions of area to redisplay
					 * (may be <= 0). */
    int imgWidth, imgHeight;		/* New dimensions of image. */
{
    register TkButton *butPtr = (TkButton *) clientData;

    if (butPtr->tkwin != NULL) {
	TkpComputeButtonGeometry(butPtr);
	if (Tk_IsMapped(butPtr->tkwin) && !(butPtr->flags & REDRAW_PENDING)) {
	    Tcl_DoWhenIdle(TkpDisplayButton, (ClientData) butPtr);
	    butPtr->flags |= REDRAW_PENDING;
	}
    }
}

/*
 *----------------------------------------------------------------------
 *
 * ButtonSelectImageProc --
 *
 *	This procedure is invoked by the image code whenever the manager
 *	for an image does something that affects the size or contents
 *	of the image displayed in a button when it is selected.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	May arrange for the button to get redisplayed.
 *
 *----------------------------------------------------------------------
 */

static void
ButtonSelectImageProc(clientData, x, y, width, height, imgWidth, imgHeight)
    ClientData clientData;		/* Pointer to widget record. */
    int x, y;				/* Upper left pixel (within image)
					 * that must be redisplayed. */
    int width, height;			/* Dimensions of area to redisplay
					 * (may be <= 0). */
    int imgWidth, imgHeight;		/* New dimensions of image. */
{
    register TkButton *butPtr = (TkButton *) clientData;

    /*
     * Don't recompute geometry:  it's controlled by the primary image.
     */

    if ((butPtr->flags & SELECTED) && (butPtr->tkwin != NULL)
	    && Tk_IsMapped(butPtr->tkwin)
	    && !(butPtr->flags & REDRAW_PENDING)) {
	Tcl_DoWhenIdle(TkpDisplayButton, (ClientData) butPtr);
	butPtr->flags |= REDRAW_PENDING;
    }
}
