/* 
 * 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
 */

#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->stippleGC = 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->stippleGC != None) {
  Tk_FreeGC(butPtr->display, butPtr->stippleGC);
    }
    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);
  }

  if ((butPtr->flags & BUTTON_DELETED)) {
      /*
       * Somehow button was deleted - just abort now. [Bug #824479]
       */
      return TCL_ERROR;
  }

  /*
   * 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;
    }

    gcValues.background = Tk_3DBorderColor(butPtr->normalBorder)->pixel;

    /*
     * Create the GC that can be used for stippling
     */

    if (butPtr->stippleGC == None) {
  gcValues.foreground = gcValues.background;
  mask = GCForeground;
  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;
  }
  butPtr->stippleGC = Tk_GetGC(butPtr->tkwin, mask, &gcValues);
    }

    /*
     * Allocate the disabled graphics context, for drawing text in
     * its disabled state.
     */

    mask = GCForeground | GCBackground | GCFont;
    if (butPtr->disabledFg != NULL) {
  gcValues.foreground = butPtr->disabledFg->pixel;
    } else {
  gcValues.foreground = gcValues.background;
    }
    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;
    }
}
