/[dtapublic]/projs/trunk/shared_source/c_tk_base_7_5_w_mods/tkbutton.c

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-revision 69 by dashley,
Sat Nov  5 10:54:17 2016 UTC
+revision 71 by dashley,
Sat Nov  5 11:07:06 2016 UTC
 Line 1
  /* $Header$ */
  /*
   * 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 1.1.1.1 2001/06/13 04:54:45 dtashley Exp $
   */
  #include "tkButton.h"
  #include "default.h"
  /*
   * 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
  };
  /*
   * Information used for parsing configuration options.  There is a
   * separate table for each of the four widget classes.
   */
  static Tk_OptionSpec labelOptionSpecs[] = {
      {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),
 , (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_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},
      {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),
 , (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),
 , (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),
 , (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_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),
 , (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},
      {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_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_STRING_TABLE, "-state", "state", "State",
          DEF_BUTTON_STATE, -1, Tk_Offset(TkButton, state),
 , (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),
 , (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),
 , (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_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},
      {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_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_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),
 , (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),
 , (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),
 , (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_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},
      {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},
      {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_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),
 , (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},
      {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 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, char *name1, char *name2,
                              int flags));
  static char *           ButtonVarProc _ANSI_ARGS_((ClientData clientData,
                              Tcl_Interp *interp, char *name1, 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;      /* Option table for this widget class, or
                                   * NULL if not created yet. */
      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;
      optionTable = (Tk_OptionTable) clientData;
      if (optionTable == NULL) {
          Tcl_CmdInfo info;
          char *name;
          /*
           * We haven't created the option table for this widget class
           * yet.  Do it now and save the table as the clientData for
           * the command, so we'll have access to it in future
           * invocations of the command.
           */
          TkpButtonSetDefaults(optionSpecs[type]);
          optionTable = Tk_CreateOptionTable(interp, optionSpecs[type]);
          name = Tcl_GetString(objv[0]);
          Tcl_GetCommandInfo(interp, name, &info);
          info.objClientData = (ClientData) optionTable;
          Tcl_SetCommandInfo(interp, name, &info);
      }
      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;
      }
      Tk_SetClass(tkwin, classNames[type]);
      butPtr = TkpCreateButton(tkwin);
      TkSetClassProcs(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. */
  {
      TkpDestroyButton(butPtr);
      butPtr->flags |= BUTTON_DELETED;
      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;
      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;
                  }
              }
          }
          /*
           * 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;
          if ((butPtr->imagePtr == NULL) && (butPtr->bitmap == 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->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. */
      char *name1;                /* Name of variable. */
      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. */
      char *name1;                /* Not used. */
      char *name2;                /* Not used. */
      int flags;                  /* Information about what happened. */
  {
      TkButton *butPtr = (TkButton *) clientData;
      char *name;
      Tcl_Obj *valuePtr;
      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;
      }
  }
  /* End of tkbutton.c */

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