/[dtapublic]/projs/ets/trunk/src/c_tk_base_7_5_w_mods/tkmenubutton.c

Diff of /projs/ets/trunk/src/c_tk_base_7_5_w_mods/tkmenubutton.c

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-revision 70 by dashley,
Sat Nov  5 10:54:17 2016 UTC
+revision 71 by dashley,
Sat Nov  5 11:07:06 2016 UTC
 Line 1
  /* $Header$ */
  /*
   * tkMenubutton.c --
   *
   *      This module implements button-like widgets that are used
   *      to invoke pull-down menus.
   *
   * Copyright (c) 1990-1994 The Regents of the University of California.
   * Copyright (c) 1994-1997 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: tkmenubutton.c,v 1.1.1.1 2001/06/13 05:05:54 dtashley Exp $
   */
  #include "tkMenubutton.h"
  #include "tkPort.h"
  #include "default.h"
  /*
   * The following table defines the legal values for the -direction
   * option.  It is used together with the "enum direction" declaration
   * in tkMenubutton.h.
   */
  static char *directionStrings[] = {
      "above", "below", "flush", "left", "right", (char *) NULL
  };
  /*
   * The following table defines the legal values for the -state option.
   * It is used together with the "enum state" declaration in tkMenubutton.h.
   */
  static char *stateStrings[] = {
      "active", "disabled", "normal", (char *) NULL
  };
  /*
   * Information used for parsing configuration specs:
   */
  static Tk_OptionSpec optionSpecs[] = {
      {TK_OPTION_BORDER, "-activebackground", "activeBackground", "Foreground",
          DEF_MENUBUTTON_ACTIVE_BG_COLOR, -1,
          Tk_Offset(TkMenuButton, activeBorder), 0,
          (ClientData) DEF_MENUBUTTON_ACTIVE_BG_MONO, 0},
      {TK_OPTION_COLOR, "-activeforeground", "activeForeground", "Background",
          DEF_MENUBUTTON_ACTIVE_FG_COLOR, -1,
           Tk_Offset(TkMenuButton, activeFg),
 , (ClientData) DEF_MENUBUTTON_ACTIVE_FG_MONO, 0},
      {TK_OPTION_ANCHOR, "-anchor", "anchor", "Anchor",
          DEF_MENUBUTTON_ANCHOR, -1,
          Tk_Offset(TkMenuButton, anchor), 0, 0, 0},
      {TK_OPTION_BORDER, "-background", "background", "Background",
          DEF_MENUBUTTON_BG_COLOR, -1, Tk_Offset(TkMenuButton, normalBorder),
 , (ClientData) DEF_MENUBUTTON_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_MENUBUTTON_BITMAP, -1, Tk_Offset(TkMenuButton, bitmap),
          TK_OPTION_NULL_OK, 0, 0},
      {TK_OPTION_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
          DEF_MENUBUTTON_BORDER_WIDTH, -1,
          Tk_Offset(TkMenuButton, borderWidth), 0, 0, 0},
      {TK_OPTION_CURSOR, "-cursor", "cursor", "Cursor",
          DEF_MENUBUTTON_CURSOR, -1, Tk_Offset(TkMenuButton, cursor),
          TK_OPTION_NULL_OK, 0, 0},
      {TK_OPTION_STRING_TABLE, "-direction", "direction", "Direction",
          DEF_MENUBUTTON_DIRECTION, -1, Tk_Offset(TkMenuButton, direction),
 , (ClientData) directionStrings, 0},
      {TK_OPTION_COLOR, "-disabledforeground", "disabledForeground",
          "DisabledForeground", DEF_MENUBUTTON_DISABLED_FG_COLOR,
          -1, Tk_Offset(TkMenuButton, disabledFg), TK_OPTION_NULL_OK,
          (ClientData) DEF_MENUBUTTON_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_MENUBUTTON_FONT, -1, Tk_Offset(TkMenuButton, tkfont), 0, 0, 0},
      {TK_OPTION_COLOR, "-foreground", "foreground", "Foreground",
          DEF_MENUBUTTON_FG, -1, Tk_Offset(TkMenuButton, normalFg), 0, 0, 0},
      {TK_OPTION_STRING, "-height", "height", "Height",
          DEF_MENUBUTTON_HEIGHT, -1, Tk_Offset(TkMenuButton, heightString),
 , 0, 0},
      {TK_OPTION_COLOR, "-highlightbackground", "highlightBackground",
          "HighlightBackground", DEF_MENUBUTTON_HIGHLIGHT_BG_COLOR,
          -1, Tk_Offset(TkMenuButton, highlightBgColorPtr), 0, 0, 0},
      {TK_OPTION_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
          DEF_MENUBUTTON_HIGHLIGHT, -1,
          Tk_Offset(TkMenuButton, highlightColorPtr),     0, 0, 0},
      {TK_OPTION_PIXELS, "-highlightthickness", "highlightThickness",
          "HighlightThickness", DEF_MENUBUTTON_HIGHLIGHT_WIDTH,
          -1, Tk_Offset(TkMenuButton, highlightWidth), 0, 0, 0},
      {TK_OPTION_STRING, "-image", "image", "Image",
          DEF_MENUBUTTON_IMAGE, -1, Tk_Offset(TkMenuButton, imageString),
          TK_OPTION_NULL_OK, 0, 0},
      {TK_OPTION_BOOLEAN, "-indicatoron", "indicatorOn", "IndicatorOn",
          DEF_MENUBUTTON_INDICATOR, -1, Tk_Offset(TkMenuButton, indicatorOn),
 , 0, 0},
      {TK_OPTION_JUSTIFY, "-justify", "justify", "Justify",
          DEF_BUTTON_JUSTIFY, -1, Tk_Offset(TkMenuButton, justify), 0, 0, 0},
      {TK_OPTION_STRING, "-menu", "menu", "Menu",
          DEF_MENUBUTTON_MENU, -1, Tk_Offset(TkMenuButton, menuName),
          TK_OPTION_NULL_OK, 0, 0},
      {TK_OPTION_PIXELS, "-padx", "padX", "Pad",
          DEF_MENUBUTTON_PADX, -1, Tk_Offset(TkMenuButton, padX),
 , 0, 0},
      {TK_OPTION_PIXELS, "-pady", "padY", "Pad",
          DEF_MENUBUTTON_PADY, -1, Tk_Offset(TkMenuButton, padY),
 , 0, 0},
      {TK_OPTION_RELIEF, "-relief", "relief", "Relief",
          DEF_MENUBUTTON_RELIEF, -1, Tk_Offset(TkMenuButton, relief),
 , 0, 0},
      {TK_OPTION_STRING_TABLE, "-state", "state", "State",
          DEF_MENUBUTTON_STATE, -1, Tk_Offset(TkMenuButton, state),
 , (ClientData) stateStrings, 0},
      {TK_OPTION_STRING, "-takefocus", "takeFocus", "TakeFocus",
          DEF_MENUBUTTON_TAKE_FOCUS, -1,
          Tk_Offset(TkMenuButton, takeFocus), TK_OPTION_NULL_OK, 0, 0},
      {TK_OPTION_STRING, "-text", "text", "Text",
          DEF_MENUBUTTON_TEXT, -1, Tk_Offset(TkMenuButton, text), 0, 0, 0},
      {TK_OPTION_STRING, "-textvariable", "textVariable", "Variable",
          DEF_MENUBUTTON_TEXT_VARIABLE, -1,
          Tk_Offset(TkMenuButton, textVarName), TK_OPTION_NULL_OK, 0, 0},
      {TK_OPTION_INT, "-underline", "underline", "Underline",
          DEF_MENUBUTTON_UNDERLINE, -1, Tk_Offset(TkMenuButton, underline),
 , 0, 0},
      {TK_OPTION_STRING, "-width", "width", "Width",
          DEF_MENUBUTTON_WIDTH, -1, Tk_Offset(TkMenuButton, widthString),
 , 0, 0},
      {TK_OPTION_PIXELS, "-wraplength", "wrapLength", "WrapLength",
          DEF_MENUBUTTON_WRAP_LENGTH, -1, Tk_Offset(TkMenuButton, wrapLength),
 , 0, 0},
      {TK_OPTION_END, (char *) NULL, (char *) NULL, (char *) NULL,
          (char *) NULL, 0, 0}
  };
  /*
   * The following tables define the menubutton widget commands and map the
   * indexes into the string tables into a single enumerated type used
   * to dispatch the scale widget command.
   */
  static char *commandNames[] = {
      "cget", "configure", (char *) NULL
  };
  enum command {
      COMMAND_CGET, COMMAND_CONFIGURE
  };
  /*
   * Forward declarations for procedures defined later in this file:
   */
  static void             MenuButtonCmdDeletedProc _ANSI_ARGS_((
                              ClientData clientData));
  static void             MenuButtonEventProc _ANSI_ARGS_((ClientData clientData,
                              XEvent *eventPtr));
  static void             MenuButtonImageProc _ANSI_ARGS_((ClientData clientData,
                              int x, int y, int width, int height, int imgWidth,
                              int imgHeight));
  static char *           MenuButtonTextVarProc _ANSI_ARGS_((
                              ClientData clientData, Tcl_Interp *interp,
                              char *name1, char *name2, int flags));
  static int              MenuButtonWidgetObjCmd _ANSI_ARGS_((
                              ClientData clientData, Tcl_Interp *interp,
                              int objc, Tcl_Obj *CONST objv[]));
  static int              ConfigureMenuButton _ANSI_ARGS_((Tcl_Interp *interp,
                              TkMenuButton *mbPtr, int objc,
                              Tcl_Obj *CONST objv[]));
  static void             DestroyMenuButton _ANSI_ARGS_((char *memPtr));
  /*
   *--------------------------------------------------------------
   *
   * Tk_MenubuttonObjCmd --
   *
   *      This procedure is invoked to process 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.
   *
   *--------------------------------------------------------------
   */
  int
  Tk_MenubuttonObjCmd(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 objects. */
  {
      register TkMenuButton *mbPtr;
      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.
           */
          optionTable = Tk_CreateOptionTable(interp, optionSpecs);
          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, "Menubutton");
      mbPtr = TkpCreateMenuButton(tkwin);
      TkSetClassProcs(tkwin, &tkpMenubuttonClass, (ClientData) mbPtr);
      /*
       * Initialize the data structure for the button.
       */
      mbPtr->tkwin = tkwin;
      mbPtr->display = Tk_Display (tkwin);
      mbPtr->interp = interp;
      mbPtr->widgetCmd = Tcl_CreateObjCommand(interp,
              Tk_PathName(mbPtr->tkwin), MenuButtonWidgetObjCmd,
              (ClientData) mbPtr, MenuButtonCmdDeletedProc);
      mbPtr->optionTable = optionTable;
      mbPtr->menuName = NULL;
      mbPtr->text = NULL;
      mbPtr->underline = -1;
      mbPtr->textVarName = NULL;
      mbPtr->bitmap = None;
      mbPtr->imageString = NULL;
      mbPtr->image = NULL;
      mbPtr->state = STATE_NORMAL;
      mbPtr->normalBorder = NULL;
      mbPtr->activeBorder = NULL;
      mbPtr->borderWidth = 0;
      mbPtr->relief = TK_RELIEF_FLAT;
      mbPtr->highlightWidth = 0;
      mbPtr->highlightBgColorPtr = NULL;
      mbPtr->highlightColorPtr = NULL;
      mbPtr->inset = 0;
      mbPtr->tkfont = NULL;
      mbPtr->normalFg = NULL;
      mbPtr->activeFg = NULL;
      mbPtr->disabledFg = NULL;
      mbPtr->normalTextGC = None;
      mbPtr->activeTextGC = None;
      mbPtr->gray = None;
      mbPtr->disabledGC = None;
      mbPtr->leftBearing = 0;
      mbPtr->rightBearing = 0;
      mbPtr->widthString = NULL;
      mbPtr->heightString = NULL;
      mbPtr->width = 0;
      mbPtr->width = 0;
      mbPtr->wrapLength = 0;
      mbPtr->padX = 0;
      mbPtr->padY = 0;
      mbPtr->anchor = TK_ANCHOR_CENTER;
      mbPtr->justify = TK_JUSTIFY_CENTER;
      mbPtr->textLayout = NULL;
      mbPtr->indicatorOn = 0;
      mbPtr->indicatorWidth = 0;
      mbPtr->indicatorHeight = 0;
      mbPtr->direction = DIRECTION_FLUSH;
      mbPtr->cursor = None;
      mbPtr->takeFocus = NULL;
      mbPtr->flags = 0;
      Tk_CreateEventHandler(mbPtr->tkwin,
              ExposureMask|StructureNotifyMask|FocusChangeMask,
              MenuButtonEventProc, (ClientData) mbPtr);
      if (Tk_InitOptions(interp, (char *) mbPtr, optionTable, tkwin)
              != TCL_OK) {
          Tk_DestroyWindow(mbPtr->tkwin);
          return TCL_ERROR;
      }
      if (ConfigureMenuButton(interp, mbPtr, objc-2, objv+2) != TCL_OK) {
          Tk_DestroyWindow(mbPtr->tkwin);
          return TCL_ERROR;
      }
      Tcl_SetStringObj(Tcl_GetObjResult(interp), Tk_PathName(mbPtr->tkwin),
              -1);
      return TCL_OK;
  }
  /*
   *--------------------------------------------------------------
   *
   * MenuButtonWidgetObjCmd --
   *
   *      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
  MenuButtonWidgetObjCmd(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 objects. */
  {
      register TkMenuButton *mbPtr = (TkMenuButton *) clientData;
      int result, index;
      Tcl_Obj *objPtr;
      if (objc < 2) {
          Tcl_WrongNumArgs(interp, 1, objv, "option ?arg arg ...?");
          return TCL_ERROR;
      }
      result = Tcl_GetIndexFromObj(interp, objv[1],
              commandNames, "option", 0, &index);
      if (result != TCL_OK) {
          return result;
      }
      Tcl_Preserve((ClientData) mbPtr);
      switch (index) {
          case COMMAND_CGET: {
              if (objc != 3) {
                  Tcl_WrongNumArgs(interp, 1, objv, "cget option");
              goto error;
              }
              objPtr = Tk_GetOptionValue(interp, (char *) mbPtr,
                      mbPtr->optionTable, objv[2], mbPtr->tkwin);
              if (objPtr == NULL) {
                  goto error;
              } else {
                  Tcl_SetObjResult(interp, objPtr);
              }
              break;
          }
          case COMMAND_CONFIGURE: {
              if (objc <= 3) {
                  objPtr = Tk_GetOptionInfo(interp, (char *) mbPtr,
                          mbPtr->optionTable,
                          (objc == 3) ? objv[2] : (Tcl_Obj *) NULL,
                          mbPtr->tkwin);
                  if (objPtr == NULL) {
                      goto error;
                  } else {
                      Tcl_SetObjResult(interp, objPtr);
                  }
              } else {
                  result = ConfigureMenuButton(interp, mbPtr, objc-2,
                          objv+2);
              }
              break;
          }
      }
      Tcl_Release((ClientData) mbPtr);
      return result;
      error:
      Tcl_Release((ClientData) mbPtr);
      return TCL_ERROR;
  }
  /*
   *----------------------------------------------------------------------
   *
   * DestroyMenuButton --
   *
   *      This procedure is invoked to recycle all of the resources
   *      associated with a menubutton widget.  It is invoked as a
   *      when-idle handler in order to make sure that there is no
   *      other use of the menubutton pending at the time of the deletion.
   *
   * Results:
   *      None.
   *
   * Side effects:
   *      Everything associated with the widget is freed up.
   *
   *----------------------------------------------------------------------
   */
  static void
  DestroyMenuButton(memPtr)
      char *memPtr;               /* Info about button widget. */
  {
      register TkMenuButton *mbPtr = (TkMenuButton *) memPtr;
      TkpDestroyMenuButton(mbPtr);
      if (mbPtr->flags & REDRAW_PENDING) {
          Tcl_CancelIdleCall(TkpDisplayMenuButton, (ClientData) mbPtr);
      }
      /*
       * Free up all the stuff that requires special handling, then
       * let Tk_FreeOptions handle all the standard option-related
       * stuff.
       */
      Tcl_DeleteCommandFromToken(mbPtr->interp, mbPtr->widgetCmd);
      if (mbPtr->textVarName != NULL) {
          Tcl_UntraceVar(mbPtr->interp, mbPtr->textVarName,
                  TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                  MenuButtonTextVarProc, (ClientData) mbPtr);
      }
      if (mbPtr->image != NULL) {
          Tk_FreeImage(mbPtr->image);
      }
      if (mbPtr->normalTextGC != None) {
          Tk_FreeGC(mbPtr->display, mbPtr->normalTextGC);
      }
      if (mbPtr->activeTextGC != None) {
          Tk_FreeGC(mbPtr->display, mbPtr->activeTextGC);
      }
      if (mbPtr->disabledGC != None) {
          Tk_FreeGC(mbPtr->display, mbPtr->disabledGC);
      }
      if (mbPtr->gray != None) {
          Tk_FreeBitmap(mbPtr->display, mbPtr->gray);
      }
      if (mbPtr->textLayout != NULL) {
          Tk_FreeTextLayout(mbPtr->textLayout);
      }
      Tk_FreeConfigOptions((char *) mbPtr, mbPtr->optionTable,
              mbPtr->tkwin);
      mbPtr->tkwin = NULL;
      Tcl_EventuallyFree((ClientData) mbPtr, TCL_DYNAMIC);
  }
  /*
   *----------------------------------------------------------------------
   *
   * ConfigureMenuButton --
   *
   *      This procedure is called to process an argv/argc list, plus
   *      the Tk option database, in order to configure (or
   *      reconfigure) a menubutton widget.
   *
   * Results:
   *      The return value is a standard Tcl result.  If TCL_ERROR is
   *      returned, then the interp's result contains an error message.
   *
   * Side effects:
   *      Configuration information, such as text string, colors, font,
   *      etc. get set for mbPtr;  old resources get freed, if there
   *      were any.  The menubutton is redisplayed.
   *
   *----------------------------------------------------------------------
   */
  static int
  ConfigureMenuButton(interp, mbPtr, objc, objv)
      Tcl_Interp *interp;         /* Used for error reporting. */
      register TkMenuButton *mbPtr;
                                  /* Information about widget;  may or may
                                   * not already have values for some
                                   * fields. */
      int objc;                   /* Number of valid entries in objv. */
      Tcl_Obj *CONST objv[];      /* Arguments. */
  {
      Tk_SavedOptions savedOptions;
      Tcl_Obj *errorResult = NULL;
      int error;
      Tk_Image image;
      /*
       * Eliminate any existing trace on variables monitored by the
       * menubutton.
       */
      if (mbPtr->textVarName != NULL) {
          Tcl_UntraceVar(interp, mbPtr->textVarName,
                  TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                  MenuButtonTextVarProc, (ClientData) mbPtr);
      }
      /*
       * 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 *) mbPtr,
                      mbPtr->optionTable, objc, objv,
                      mbPtr->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 ((mbPtr->state == STATE_ACTIVE)
                  && !Tk_StrictMotif(mbPtr->tkwin)) {
              Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->activeBorder);
          } else {
              Tk_SetBackgroundFromBorder(mbPtr->tkwin, mbPtr->normalBorder);
          }
          if (mbPtr->highlightWidth < 0) {
              mbPtr->highlightWidth = 0;
          }
          if (mbPtr->padX < 0) {
              mbPtr->padX = 0;
          }
          if (mbPtr->padY < 0) {
              mbPtr->padY = 0;
          }
          /*
           * Get the image for the widget, if there is one.  Allocate the
           * new image before freeing the old one, so that the reference
           * count doesn't go to zero and cause image data to be discarded.
           */
          if (mbPtr->imageString != NULL) {
              image = Tk_GetImage(mbPtr->interp, mbPtr->tkwin,
                      mbPtr->imageString, MenuButtonImageProc,
                      (ClientData) mbPtr);
              if (image == NULL) {
                  return TCL_ERROR;
              }
          } else {
              image = NULL;
          }
          if (mbPtr->image != NULL) {
              Tk_FreeImage(mbPtr->image);
          }
          mbPtr->image = image;
          /*
           * Recompute the geometry for the button.
           */
          if ((mbPtr->bitmap != None) || (mbPtr->image != NULL)) {
              if (Tk_GetPixels(interp, mbPtr->tkwin, mbPtr->widthString,
                      &mbPtr->width) != TCL_OK) {
                  widthError:
                  Tcl_AddErrorInfo(interp, "\n    (processing -width option)");
                  continue;
              }
              if (Tk_GetPixels(interp, mbPtr->tkwin, mbPtr->heightString,
                      &mbPtr->height) != TCL_OK) {
                  heightError:
                  Tcl_AddErrorInfo(interp, "\n    (processing -height option)");
                  continue;
              }
          } else {
              if (Tcl_GetInt(interp, mbPtr->widthString, &mbPtr->width)
                      != TCL_OK) {
                  goto widthError;
              }
              if (Tcl_GetInt(interp, mbPtr->heightString, &mbPtr->height)
                      != TCL_OK) {
                  goto heightError;
              }
          }
          break;
      }
      if (!error) {
        Tk_FreeSavedOptions(&savedOptions);
      }
      if ((mbPtr->image == NULL) && (mbPtr->bitmap == None)
              && (mbPtr->textVarName != NULL)) {
        /*
         * The menubutton displays the value of a variable.
         * Set up a trace to watch for any changes in it, create
         * the variable if it doesn't exist, and fetch its
         * current value.
         */
        char *value;
        value = Tcl_GetVar(interp, mbPtr->textVarName, TCL_GLOBAL_ONLY);
        if (value == NULL) {
            Tcl_SetVar(interp, mbPtr->textVarName, mbPtr->text,
                       TCL_GLOBAL_ONLY);
        } else {
            if (mbPtr->text != NULL) {
                ckfree(mbPtr->text);
            }
            mbPtr->text = (char *) ckalloc((unsigned) (strlen(value) + 1));
            strcpy(mbPtr->text, value);
        }
        Tcl_TraceVar(interp, mbPtr->textVarName,
                     TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                     MenuButtonTextVarProc, (ClientData) mbPtr);
      }
      TkMenuButtonWorldChanged((ClientData) mbPtr);
      if (error) {
          Tcl_SetObjResult(interp, errorResult);
          Tcl_DecrRefCount(errorResult);
          return TCL_ERROR;
      } else {
          return TCL_OK;
      }
  }
  /*
   *---------------------------------------------------------------------------
   *
   * TkMenuButtonWorldChanged --
   *
   *      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:
   *      TkMenuButton will be relayed out and redisplayed.
   *
   *---------------------------------------------------------------------------
   */
  void
  TkMenuButtonWorldChanged(instanceData)
      ClientData instanceData;    /* Information about widget. */
  {
      XGCValues gcValues;
      GC gc;
      unsigned long mask;
      TkMenuButton *mbPtr;
      mbPtr = (TkMenuButton *) instanceData;
      gcValues.font = Tk_FontId(mbPtr->tkfont);
      gcValues.foreground = mbPtr->normalFg->pixel;
      gcValues.background = Tk_3DBorderColor(mbPtr->normalBorder)->pixel;
      /*
       * Note: GraphicsExpose events are disabled in GC's because they're
       * 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;
      gc = Tk_GetGC(mbPtr->tkwin, mask, &gcValues);
      if (mbPtr->normalTextGC != None) {
          Tk_FreeGC(mbPtr->display, mbPtr->normalTextGC);
      }
      mbPtr->normalTextGC = gc;
      gcValues.font = Tk_FontId(mbPtr->tkfont);
      gcValues.foreground = mbPtr->activeFg->pixel;
      gcValues.background = Tk_3DBorderColor(mbPtr->activeBorder)->pixel;
      mask = GCForeground | GCBackground | GCFont;
      gc = Tk_GetGC(mbPtr->tkwin, mask, &gcValues);
      if (mbPtr->activeTextGC != None) {
          Tk_FreeGC(mbPtr->display, mbPtr->activeTextGC);
      }
      mbPtr->activeTextGC = gc;
      gcValues.font = Tk_FontId(mbPtr->tkfont);
      gcValues.background = Tk_3DBorderColor(mbPtr->normalBorder)->pixel;
      if ((mbPtr->disabledFg != NULL) && (mbPtr->imageString == NULL)) {
          gcValues.foreground = mbPtr->disabledFg->pixel;
          mask = GCForeground | GCBackground | GCFont;
      } else {
          gcValues.foreground = gcValues.background;
          mask = GCForeground;
          if (mbPtr->gray == None) {
              mbPtr->gray = Tk_GetBitmap(NULL, mbPtr->tkwin,
                      Tk_GetUid("gray50"));
          }
          if (mbPtr->gray != None) {
              gcValues.fill_style = FillStippled;
              gcValues.stipple = mbPtr->gray;
              mask |= GCFillStyle | GCStipple;
          }
      }
      gc = Tk_GetGC(mbPtr->tkwin, mask, &gcValues);
      if (mbPtr->disabledGC != None) {
          Tk_FreeGC(mbPtr->display, mbPtr->disabledGC);
      }
      mbPtr->disabledGC = gc;
      TkpComputeMenuButtonGeometry(mbPtr);
      /*
       * Lastly, arrange for the button to be redisplayed.
       */
      if (Tk_IsMapped(mbPtr->tkwin) && !(mbPtr->flags & REDRAW_PENDING)) {
          Tcl_DoWhenIdle(TkpDisplayMenuButton, (ClientData) mbPtr);
          mbPtr->flags |= REDRAW_PENDING;
      }
  }
  /*
   *--------------------------------------------------------------
   *
   * MenuButtonEventProc --
   *
   *      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
  MenuButtonEventProc(clientData, eventPtr)
      ClientData clientData;      /* Information about window. */
      XEvent *eventPtr;           /* Information about event. */
  {
      TkMenuButton *mbPtr = (TkMenuButton *) 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) {
          DestroyMenuButton((char *) mbPtr);
      } else if (eventPtr->type == FocusIn) {
          if (eventPtr->xfocus.detail != NotifyInferior) {
              mbPtr->flags |= GOT_FOCUS;
              if (mbPtr->highlightWidth > 0) {
                  goto redraw;
              }
          }
      } else if (eventPtr->type == FocusOut) {
          if (eventPtr->xfocus.detail != NotifyInferior) {
              mbPtr->flags &= ~GOT_FOCUS;
              if (mbPtr->highlightWidth > 0) {
                  goto redraw;
              }
          }
      }
      return;
      redraw:
      if ((mbPtr->tkwin != NULL) && !(mbPtr->flags & REDRAW_PENDING)) {
          Tcl_DoWhenIdle(TkpDisplayMenuButton, (ClientData) mbPtr);
          mbPtr->flags |= REDRAW_PENDING;
      }
  }
  /*
   *----------------------------------------------------------------------
   *
   * MenuButtonCmdDeletedProc --
   *
   *      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
  MenuButtonCmdDeletedProc(clientData)
      ClientData clientData;      /* Pointer to widget record for widget. */
  {
      TkMenuButton *mbPtr = (TkMenuButton *) clientData;
      Tk_Window tkwin = mbPtr->tkwin;
      /*
       * This procedure could be invoked either because the window was
       * destroyed and the command was then deleted (in which case tkwin
       * is NULL) or because the command was deleted, and then this procedure
       * destroys the widget.
       */
      if (tkwin != NULL) {
          Tk_DestroyWindow(tkwin);
      }
  }
  /*
   *--------------------------------------------------------------
   *
   * MenuButtonTextVarProc --
   *
   *      This procedure is invoked when someone changes the variable
   *      whose contents are to be displayed in a menu button.
   *
   * Results:
   *      NULL is always returned.
   *
   * Side effects:
   *      The text displayed in the menu button will change to match the
   *      variable.
   *
   *--------------------------------------------------------------
   */
          /* ARGSUSED */
  static char *
  MenuButtonTextVarProc(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 TkMenuButton *mbPtr = (TkMenuButton *) clientData;
      char *value;
      /*
       * 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_SetVar(interp, mbPtr->textVarName, mbPtr->text,
                      TCL_GLOBAL_ONLY);
              Tcl_TraceVar(interp, mbPtr->textVarName,
                      TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
                      MenuButtonTextVarProc, clientData);
          }
          return (char *) NULL;
      }
      value = Tcl_GetVar(interp, mbPtr->textVarName, TCL_GLOBAL_ONLY);
      if (value == NULL) {
          value = "";
      }
      if (mbPtr->text != NULL) {
          ckfree(mbPtr->text);
      }
      mbPtr->text = (char *) ckalloc((unsigned) (strlen(value) + 1));
      strcpy(mbPtr->text, value);
      TkpComputeMenuButtonGeometry(mbPtr);
      if ((mbPtr->tkwin != NULL) && Tk_IsMapped(mbPtr->tkwin)
              && !(mbPtr->flags & REDRAW_PENDING)) {
          Tcl_DoWhenIdle(TkpDisplayMenuButton, (ClientData) mbPtr);
          mbPtr->flags |= REDRAW_PENDING;
      }
      return (char *) NULL;
  }
  /*
   *----------------------------------------------------------------------
   *
   * MenuButtonImageProc --
   *
   *      This procedure is invoked by the image code whenever the manager
   *      for an image does something that affects the size of contents
   *      of an image displayed in a button.
   *
   * Results:
   *      None.
   *
   * Side effects:
   *      Arranges for the button to get redisplayed.
   *
   *----------------------------------------------------------------------
   */
  static void
  MenuButtonImageProc(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 TkMenuButton *mbPtr = (TkMenuButton *) clientData;
      if (mbPtr->tkwin != NULL) {
          TkpComputeMenuButtonGeometry(mbPtr);
          if (Tk_IsMapped(mbPtr->tkwin) && !(mbPtr->flags & REDRAW_PENDING)) {
              Tcl_DoWhenIdle(TkpDisplayMenuButton, (ClientData) mbPtr);
              mbPtr->flags |= REDRAW_PENDING;
          }
      }
  }
  /* End of tkmenubutton.c */

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