Initial revision

1 files changed, 1347 insertions, 0 deletions

diff --git a/generic/tkButton.c b/generic/tkButton.c
new file mode 100644
index 0000000..c9c25c2
--- /dev/null
+++ b/generic/tkButton.c
@@ -0,0 +1,1347 @@
+/* 
+ * tkButton.c --
+ *
+ *	This module implements a collection of button-like
+ *	widgets for the Tk toolkit.  The widgets implemented
+ *	include labels, buttons, check buttons, and radio
+ *	buttons.
+ *
+ * Copyright (c) 1990-1994 The Regents of the University of California.
+ * Copyright (c) 1994-1995 Sun Microsystems, Inc.
+ *
+ * See the file "license.terms" for information on usage and redistribution
+ * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ *
+ * SCCS: @(#) tkButton.c 1.144 97/07/31 09:04:57
+ */
+
+#include "tkButton.h"
+#include "default.h"
+
+/*
+ * Class names for buttons, indexed by one of the type values above.
+ */
+
+static char *classNames[] = {"Label", "Button", "Checkbutton", "Radiobutton"};
+
+/*
+ * The class procedure table for the button widget.
+ */
+
+static int configFlags[] = {LABEL_MASK, BUTTON_MASK,
+	CHECK_BUTTON_MASK, RADIO_BUTTON_MASK};
+
+/*
+ * Information used for parsing configuration specs:
+ */
+
+Tk_ConfigSpec tkpButtonConfigSpecs[] = {
+    {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
+	DEF_BUTTON_ACTIVE_BG_COLOR, Tk_Offset(TkButton, activeBorder),
+	BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK
+	|TK_CONFIG_COLOR_ONLY},
+    {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
+	DEF_BUTTON_ACTIVE_BG_MONO, Tk_Offset(TkButton, activeBorder),
+	BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK
+	|TK_CONFIG_MONO_ONLY},
+    {TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
+	DEF_BUTTON_ACTIVE_FG_COLOR, Tk_Offset(TkButton, activeFg), 
+	BUTTON_MASK|TK_CONFIG_COLOR_ONLY},
+    {TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
+	DEF_CHKRAD_ACTIVE_FG_COLOR, Tk_Offset(TkButton, activeFg), 
+	CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|TK_CONFIG_COLOR_ONLY},
+    {TK_CONFIG_COLOR, "-activeforeground", "activeForeground", "Background",
+	DEF_BUTTON_ACTIVE_FG_MONO, Tk_Offset(TkButton, activeFg), 
+	BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK
+	|TK_CONFIG_MONO_ONLY},
+    {TK_CONFIG_ANCHOR, "-anchor", "anchor", "Anchor",
+	DEF_BUTTON_ANCHOR, Tk_Offset(TkButton, anchor), ALL_MASK},
+    {TK_CONFIG_BORDER, "-background", "background", "Background",
+	DEF_BUTTON_BG_COLOR, Tk_Offset(TkButton, normalBorder),
+	ALL_MASK | TK_CONFIG_COLOR_ONLY},
+    {TK_CONFIG_BORDER, "-background", "background", "Background",
+	DEF_BUTTON_BG_MONO, Tk_Offset(TkButton, normalBorder),
+	ALL_MASK | TK_CONFIG_MONO_ONLY},
+    {TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
+	(char *) NULL, 0, ALL_MASK},
+    {TK_CONFIG_SYNONYM, "-bg", "background", (char *) NULL,
+	(char *) NULL, 0, ALL_MASK},
+    {TK_CONFIG_BITMAP, "-bitmap", "bitmap", "Bitmap",
+	DEF_BUTTON_BITMAP, Tk_Offset(TkButton, bitmap),
+	ALL_MASK|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
+	DEF_BUTTON_BORDER_WIDTH, Tk_Offset(TkButton, borderWidth), ALL_MASK},
+    {TK_CONFIG_STRING, "-command", "command", "Command",
+	DEF_BUTTON_COMMAND, Tk_Offset(TkButton, command),
+	BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
+	DEF_BUTTON_CURSOR, Tk_Offset(TkButton, cursor),
+	ALL_MASK|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_UID, "-default", "default", "Default",
+        DEF_BUTTON_DEFAULT, Tk_Offset(TkButton, defaultState), BUTTON_MASK},
+    {TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
+	"DisabledForeground", DEF_BUTTON_DISABLED_FG_COLOR,
+	Tk_Offset(TkButton, disabledFg), BUTTON_MASK|CHECK_BUTTON_MASK
+	|RADIO_BUTTON_MASK|TK_CONFIG_COLOR_ONLY|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_COLOR, "-disabledforeground", "disabledForeground",
+	"DisabledForeground", DEF_BUTTON_DISABLED_FG_MONO,
+	Tk_Offset(TkButton, disabledFg), BUTTON_MASK|CHECK_BUTTON_MASK
+	|RADIO_BUTTON_MASK|TK_CONFIG_MONO_ONLY|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_SYNONYM, "-fg", "foreground", (char *) NULL,
+	(char *) NULL, 0, ALL_MASK},
+    {TK_CONFIG_FONT, "-font", "font", "Font",
+	DEF_BUTTON_FONT, Tk_Offset(TkButton, tkfont),
+	ALL_MASK},
+    {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
+	DEF_BUTTON_FG, Tk_Offset(TkButton, normalFg), LABEL_MASK|BUTTON_MASK},
+    {TK_CONFIG_COLOR, "-foreground", "foreground", "Foreground",
+	DEF_CHKRAD_FG, Tk_Offset(TkButton, normalFg), CHECK_BUTTON_MASK
+	|RADIO_BUTTON_MASK},
+    {TK_CONFIG_STRING, "-height", "height", "Height",
+	DEF_BUTTON_HEIGHT, Tk_Offset(TkButton, heightString), ALL_MASK},
+    {TK_CONFIG_BORDER, "-highlightbackground", "highlightBackground",
+	"HighlightBackground", DEF_BUTTON_HIGHLIGHT_BG,
+	Tk_Offset(TkButton, highlightBorder), ALL_MASK},
+    {TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
+	DEF_BUTTON_HIGHLIGHT, Tk_Offset(TkButton, highlightColorPtr),
+	ALL_MASK},
+    {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
+	"HighlightThickness",
+	DEF_LABEL_HIGHLIGHT_WIDTH, Tk_Offset(TkButton, highlightWidth),
+	LABEL_MASK},
+    {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
+	"HighlightThickness",
+	DEF_BUTTON_HIGHLIGHT_WIDTH, Tk_Offset(TkButton, highlightWidth),
+	BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
+    {TK_CONFIG_STRING, "-image", "image", "Image",
+	DEF_BUTTON_IMAGE, Tk_Offset(TkButton, imageString),
+	ALL_MASK|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_BOOLEAN, "-indicatoron", "indicatorOn", "IndicatorOn",
+	DEF_BUTTON_INDICATOR, Tk_Offset(TkButton, indicatorOn),
+	CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
+    {TK_CONFIG_JUSTIFY, "-justify", "justify", "Justify",
+	DEF_BUTTON_JUSTIFY, Tk_Offset(TkButton, justify), ALL_MASK},
+    {TK_CONFIG_STRING, "-offvalue", "offValue", "Value",
+	DEF_BUTTON_OFF_VALUE, Tk_Offset(TkButton, offValue),
+	CHECK_BUTTON_MASK},
+    {TK_CONFIG_STRING, "-onvalue", "onValue", "Value",
+	DEF_BUTTON_ON_VALUE, Tk_Offset(TkButton, onValue),
+	CHECK_BUTTON_MASK},
+    {TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
+	DEF_BUTTON_PADX, Tk_Offset(TkButton, padX), BUTTON_MASK},
+    {TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
+	DEF_LABCHKRAD_PADX, Tk_Offset(TkButton, padX),
+	LABEL_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
+    {TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
+	DEF_BUTTON_PADY, Tk_Offset(TkButton, padY), BUTTON_MASK},
+    {TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
+	DEF_LABCHKRAD_PADY, Tk_Offset(TkButton, padY),
+	LABEL_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
+    {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
+	DEF_BUTTON_RELIEF, Tk_Offset(TkButton, relief), BUTTON_MASK},
+    {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
+	DEF_LABCHKRAD_RELIEF, Tk_Offset(TkButton, relief),
+	LABEL_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
+    {TK_CONFIG_BORDER, "-selectcolor", "selectColor", "Background",
+	DEF_BUTTON_SELECT_COLOR, Tk_Offset(TkButton, selectBorder),
+	CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|TK_CONFIG_COLOR_ONLY
+	|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_BORDER, "-selectcolor", "selectColor", "Background",
+	DEF_BUTTON_SELECT_MONO, Tk_Offset(TkButton, selectBorder),
+	CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|TK_CONFIG_MONO_ONLY
+	|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_STRING, "-selectimage", "selectImage", "SelectImage",
+	DEF_BUTTON_SELECT_IMAGE, Tk_Offset(TkButton, selectImageString),
+	CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_UID, "-state", "state", "State",
+	DEF_BUTTON_STATE, Tk_Offset(TkButton, state),
+	BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK},
+    {TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
+	DEF_LABEL_TAKE_FOCUS, Tk_Offset(TkButton, takeFocus),
+	LABEL_MASK|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
+	DEF_BUTTON_TAKE_FOCUS, Tk_Offset(TkButton, takeFocus),
+	BUTTON_MASK|CHECK_BUTTON_MASK|RADIO_BUTTON_MASK|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_STRING, "-text", "text", "Text",
+	DEF_BUTTON_TEXT, Tk_Offset(TkButton, text), ALL_MASK},
+    {TK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
+	DEF_BUTTON_TEXT_VARIABLE, Tk_Offset(TkButton, textVarName),
+	ALL_MASK|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_INT, "-underline", "underline", "Underline",
+	DEF_BUTTON_UNDERLINE, Tk_Offset(TkButton, underline), ALL_MASK},
+    {TK_CONFIG_STRING, "-value", "value", "Value",
+	DEF_BUTTON_VALUE, Tk_Offset(TkButton, onValue),
+	RADIO_BUTTON_MASK},
+    {TK_CONFIG_STRING, "-variable", "variable", "Variable",
+	DEF_RADIOBUTTON_VARIABLE, Tk_Offset(TkButton, selVarName),
+	RADIO_BUTTON_MASK},
+    {TK_CONFIG_STRING, "-variable", "variable", "Variable",
+	DEF_CHECKBUTTON_VARIABLE, Tk_Offset(TkButton, selVarName),
+	CHECK_BUTTON_MASK|TK_CONFIG_NULL_OK},
+    {TK_CONFIG_STRING, "-width", "width", "Width",
+	DEF_BUTTON_WIDTH, Tk_Offset(TkButton, widthString), ALL_MASK},
+    {TK_CONFIG_PIXELS, "-wraplength", "wrapLength", "WrapLength",
+	DEF_BUTTON_WRAP_LENGTH, Tk_Offset(TkButton, wrapLength), ALL_MASK},
+    {TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
+	(char *) NULL, 0, 0}
+};
+
+/*
+ * String to print out in error messages, identifying options for
+ * widget commands for different types of labels or buttons:
+ */
+
+static char *optionStrings[] = {
+    "cget or configure",
+    "cget, configure, flash, or invoke",
+    "cget, configure, deselect, flash, invoke, select, or toggle",
+    "cget, configure, deselect, flash, invoke, or 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 argc, char **argv,
+			    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		ButtonWidgetCmd _ANSI_ARGS_((ClientData clientData,
+			    Tcl_Interp *interp, int argc, char **argv));
+static int		ConfigureButton _ANSI_ARGS_((Tcl_Interp *interp,
+			    TkButton *butPtr, int argc, char **argv,
+			    int flags));
+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_ButtonCmd(clientData, interp, argc, argv)
+    ClientData clientData;	/* Main window associated with
+				 * interpreter. */
+    Tcl_Interp *interp;		/* Current interpreter. */
+    int argc;			/* Number of arguments. */
+    char **argv;		/* Argument strings. */
+{
+    return ButtonCreate(clientData, interp, argc, argv, TYPE_BUTTON);
+}
+
+int
+Tk_CheckbuttonCmd(clientData, interp, argc, argv)
+    ClientData clientData;	/* Main window associated with
+				 * interpreter. */
+    Tcl_Interp *interp;		/* Current interpreter. */
+    int argc;			/* Number of arguments. */
+    char **argv;		/* Argument strings. */
+{
+    return ButtonCreate(clientData, interp, argc, argv, TYPE_CHECK_BUTTON);
+}
+
+int
+Tk_LabelCmd(clientData, interp, argc, argv)
+    ClientData clientData;	/* Main window associated with
+				 * interpreter. */
+    Tcl_Interp *interp;		/* Current interpreter. */
+    int argc;			/* Number of arguments. */
+    char **argv;		/* Argument strings. */
+{
+    return ButtonCreate(clientData, interp, argc, argv, TYPE_LABEL);
+}
+
+int
+Tk_RadiobuttonCmd(clientData, interp, argc, argv)
+    ClientData clientData;	/* Main window associated with
+				 * interpreter. */
+    Tcl_Interp *interp;		/* Current interpreter. */
+    int argc;			/* Number of arguments. */
+    char **argv;		/* Argument strings. */
+{
+    return ButtonCreate(clientData, interp, argc, argv, 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, argc, argv, type)
+    ClientData clientData;	/* Main window associated with
+				 * interpreter. */
+    Tcl_Interp *interp;		/* Current interpreter. */
+    int argc;			/* Number of arguments. */
+    char **argv;		/* Argument strings. */
+    int type;			/* Type of button to create: TYPE_LABEL,
+				 * TYPE_BUTTON, TYPE_CHECK_BUTTON, or
+				 * TYPE_RADIO_BUTTON. */
+{
+    register TkButton *butPtr;
+    Tk_Window tkwin = (Tk_Window) clientData;
+    Tk_Window new;
+
+    if (argc < 2) {
+	Tcl_AppendResult(interp, "wrong # args: should be \"",
+		argv[0], " pathName ?options?\"", (char *) NULL);
+	return TCL_ERROR;
+    }
+
+    /*
+     * Create the new window.
+     */
+
+    new = Tk_CreateWindowFromPath(interp, tkwin, argv[1], (char *) NULL);
+    if (new == NULL) {
+	return TCL_ERROR;
+    }
+
+    Tk_SetClass(new, classNames[type]);
+    butPtr = TkpCreateButton(new);
+
+    TkSetClassProcs(new, &tkpButtonProcs, (ClientData) butPtr);
+
+    /*
+     * Initialize the data structure for the button.
+     */
+
+    butPtr->tkwin = new;
+    butPtr->display = Tk_Display(new);
+    butPtr->widgetCmd = Tcl_CreateCommand(interp, Tk_PathName(butPtr->tkwin),
+	    ButtonWidgetCmd, (ClientData) butPtr, ButtonCmdDeletedProc);
+    butPtr->interp = interp;
+    butPtr->type = type;
+    butPtr->text = NULL;
+    butPtr->underline = -1;
+    butPtr->textVarName = NULL;
+    butPtr->bitmap = None;
+    butPtr->imageString = NULL;
+    butPtr->image = NULL;
+    butPtr->selectImageString = NULL;
+    butPtr->selectImage = NULL;
+    butPtr->state = tkNormalUid;
+    butPtr->normalBorder = NULL;
+    butPtr->activeBorder = NULL;
+    butPtr->borderWidth = 0;
+    butPtr->relief = TK_RELIEF_FLAT;
+    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->gray = None;
+    butPtr->disabledGC = None;
+    butPtr->copyGC = None;
+    butPtr->widthString = NULL;
+    butPtr->heightString = NULL;
+    butPtr->width = 0;
+    butPtr->height = 0;
+    butPtr->wrapLength = 0;
+    butPtr->padX = 0;
+    butPtr->padY = 0;
+    butPtr->anchor = TK_ANCHOR_CENTER;
+    butPtr->justify = TK_JUSTIFY_CENTER;
+    butPtr->textLayout = NULL;
+    butPtr->indicatorOn = 0;
+    butPtr->selectBorder = NULL;
+    butPtr->indicatorSpace = 0;
+    butPtr->indicatorDiameter = 0;
+    butPtr->defaultState = tkDisabledUid;
+    butPtr->selVarName = NULL;
+    butPtr->onValue = NULL;
+    butPtr->offValue = NULL;
+    butPtr->cursor = None;
+    butPtr->command = NULL;
+    butPtr->takeFocus = NULL;
+    butPtr->flags = 0;
+
+    Tk_CreateEventHandler(butPtr->tkwin,
+	    ExposureMask|StructureNotifyMask|FocusChangeMask,
+	    ButtonEventProc, (ClientData) butPtr);
+
+    if (ConfigureButton(interp, butPtr, argc - 2, argv + 2,
+	    configFlags[type]) != TCL_OK) {
+	Tk_DestroyWindow(butPtr->tkwin);
+	return TCL_ERROR;
+    }
+
+    interp->result = Tk_PathName(butPtr->tkwin);
+    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
+ButtonWidgetCmd(clientData, interp, argc, argv)
+    ClientData clientData;	/* Information about button widget. */
+    Tcl_Interp *interp;		/* Current interpreter. */
+    int argc;			/* Number of arguments. */
+    char **argv;		/* Argument strings. */
+{
+    register TkButton *butPtr = (TkButton *) clientData;
+    int result = TCL_OK;
+    size_t length;
+    int c;
+
+    if (argc < 2) {
+	sprintf(interp->result,
+		"wrong # args: should be \"%.50s option ?arg arg ...?\"",
+		argv[0]);
+	return TCL_ERROR;
+    }
+    Tcl_Preserve((ClientData) butPtr);
+    c = argv[1][0];
+    length = strlen(argv[1]);
+
+    if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
+	    && (length >= 2)) {
+	if (argc != 3) {
+	    Tcl_AppendResult(interp, "wrong # args: should be \"",
+		    argv[0], " cget option\"",
+		    (char *) NULL);
+	    goto error;
+	}
+	result = Tk_ConfigureValue(interp, butPtr->tkwin, tkpButtonConfigSpecs,
+		(char *) butPtr, argv[2], configFlags[butPtr->type]);
+    } else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
+	    && (length >= 2)) {
+	if (argc == 2) {
+	    result = Tk_ConfigureInfo(interp, butPtr->tkwin,
+		    tkpButtonConfigSpecs, (char *) butPtr, (char *) NULL,
+		    configFlags[butPtr->type]);
+	} else if (argc == 3) {
+	    result = Tk_ConfigureInfo(interp, butPtr->tkwin,
+		    tkpButtonConfigSpecs, (char *) butPtr, argv[2],
+		    configFlags[butPtr->type]);
+	} else {
+	    result = ConfigureButton(interp, butPtr, argc-2, argv+2,
+		    configFlags[butPtr->type] | TK_CONFIG_ARGV_ONLY);
+	}
+    } else if ((c == 'd') && (strncmp(argv[1], "deselect", length) == 0)
+	    && (butPtr->type >= TYPE_CHECK_BUTTON)) {
+	if (argc > 2) {
+	    sprintf(interp->result,
+		    "wrong # args: should be \"%.50s deselect\"",
+		    argv[0]);
+	    goto error;
+	}
+	if (butPtr->type == TYPE_CHECK_BUTTON) {
+	    if (Tcl_SetVar(interp, butPtr->selVarName, butPtr->offValue,
+		    TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+		result = TCL_ERROR;
+	    }
+	} else if (butPtr->flags & SELECTED) {
+	    if (Tcl_SetVar(interp, butPtr->selVarName, "",
+		    TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+		result = TCL_ERROR;
+	    };
+	}
+    } else if ((c == 'f') && (strncmp(argv[1], "flash", length) == 0)
+	    && (butPtr->type != TYPE_LABEL)) {
+	int i;
+
+	if (argc > 2) {
+	    sprintf(interp->result,
+		    "wrong # args: should be \"%.50s flash\"",
+		    argv[0]);
+	    goto error;
+	}
+	if (butPtr->state != tkDisabledUid) {
+	    for (i = 0; i < 4; i++) {
+		butPtr->state = (butPtr->state == tkNormalUid)
+			? tkActiveUid : tkNormalUid;
+		Tk_SetBackgroundFromBorder(butPtr->tkwin,
+			(butPtr->state == tkActiveUid) ? butPtr->activeBorder
+			: 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);
+	    }
+	}
+    } else if ((c == 'i') && (strncmp(argv[1], "invoke", length) == 0)
+	    && (butPtr->type > TYPE_LABEL)) {
+	if (argc > 2) {
+	    sprintf(interp->result,
+		    "wrong # args: should be \"%.50s invoke\"",
+		    argv[0]);
+	    goto error;
+	}
+	if (butPtr->state != tkDisabledUid) {
+	    result = TkInvokeButton(butPtr);
+	}
+    } else if ((c == 's') && (strncmp(argv[1], "select", length) == 0)
+	    && (butPtr->type >= TYPE_CHECK_BUTTON)) {
+	if (argc > 2) {
+	    sprintf(interp->result,
+		    "wrong # args: should be \"%.50s select\"",
+		    argv[0]);
+	    goto error;
+	}
+	if (Tcl_SetVar(interp, butPtr->selVarName, butPtr->onValue,
+		TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+	    result = TCL_ERROR;
+	}
+    } else if ((c == 't') && (strncmp(argv[1], "toggle", length) == 0)
+	    && (length >= 2) && (butPtr->type == TYPE_CHECK_BUTTON)) {
+	if (argc > 2) {
+	    sprintf(interp->result,
+		    "wrong # args: should be \"%.50s toggle\"",
+		    argv[0]);
+	    goto error;
+	}
+	if (butPtr->flags & SELECTED) {
+	    if (Tcl_SetVar(interp, butPtr->selVarName, butPtr->offValue,
+		    TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+		result = TCL_ERROR;
+	    }
+	} else {
+	    if (Tcl_SetVar(interp, butPtr->selVarName, butPtr->onValue,
+		    TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+		result = TCL_ERROR;
+	    }
+	}
+    } else {
+	sprintf(interp->result,
+		"bad option \"%.50s\": must be %s", argv[1],
+		optionStrings[butPtr->type]);
+	goto error;
+    }
+    Tcl_Release((ClientData) butPtr);
+    return result;
+
+    error:
+    Tcl_Release((ClientData) butPtr);
+    return TCL_ERROR;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * DestroyButton --
+ *
+ *	This procedure is invoked by Tcl_EventuallyFree or Tcl_Release
+ *	to clean up the internal structure of a button at a safe time
+ *	(when no-one is using it anymore).
+ *
+ * Results:
+ *	None.
+ *
+ * Side effects:
+ *	Everything associated with the widget is freed up.
+ *
+ *----------------------------------------------------------------------
+ */
+
+static void
+DestroyButton(butPtr)
+    TkButton *butPtr;		/* Info about button widget. */
+{
+    /*
+     * Free up all the stuff that requires special handling, then
+     * let Tk_FreeOptions handle all the standard option-related
+     * stuff.
+     */
+
+    if (butPtr->textVarName != NULL) {
+	Tcl_UntraceVar(butPtr->interp, butPtr->textVarName,
+		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->gray != None) {
+	Tk_FreeBitmap(butPtr->display, butPtr->gray);
+    }
+    if (butPtr->disabledGC != None) {
+	Tk_FreeGC(butPtr->display, butPtr->disabledGC);
+    }
+    if (butPtr->copyGC != None) {
+	Tk_FreeGC(butPtr->display, butPtr->copyGC);
+    }
+    if (butPtr->selVarName != NULL) {
+	Tcl_UntraceVar(butPtr->interp, butPtr->selVarName,
+		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		ButtonVarProc, (ClientData) butPtr);
+    }
+    Tk_FreeTextLayout(butPtr->textLayout);
+    Tk_FreeOptions(tkpButtonConfigSpecs, (char *) butPtr, butPtr->display,
+	    configFlags[butPtr->type]);
+    Tcl_EventuallyFree((ClientData)butPtr, TCL_DYNAMIC);
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * ConfigureButton --
+ *
+ *	This procedure is called to process an argv/argc list, plus
+ *	the Tk option database, in order to configure (or
+ *	reconfigure) a button widget.
+ *
+ * Results:
+ *	The return value is a standard Tcl result.  If TCL_ERROR is
+ *	returned, then interp->result contains an error message.
+ *
+ * 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, argc, argv, flags)
+    Tcl_Interp *interp;		/* Used for error reporting. */
+    register TkButton *butPtr;	/* Information about widget;  may or may
+				 * not already have values for some fields. */
+    int argc;			/* Number of valid entries in argv. */
+    char **argv;		/* Arguments. */
+    int flags;			/* Flags to pass to Tk_ConfigureWidget. */
+{
+    Tk_Image image;
+
+    /*
+     * Eliminate any existing trace on variables monitored by the button.
+     */
+
+    if (butPtr->textVarName != NULL) {
+	Tcl_UntraceVar(interp, butPtr->textVarName, 
+		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		ButtonTextVarProc, (ClientData) butPtr);
+    }
+    if (butPtr->selVarName != NULL) {
+	Tcl_UntraceVar(interp, butPtr->selVarName, 
+		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		ButtonVarProc, (ClientData) butPtr);
+    }
+
+    
+
+    if (Tk_ConfigureWidget(interp, butPtr->tkwin, tkpButtonConfigSpecs,
+	    argc, argv, (char *) butPtr, flags) != TCL_OK) {
+	return TCL_ERROR;
+    }
+
+    /*
+     * A few options need special processing, such as setting the
+     * background from a 3-D border, or filling in complicated
+     * defaults that couldn't be specified to Tk_ConfigureWidget.
+     */
+
+    if ((butPtr->state == tkActiveUid) && !Tk_StrictMotif(butPtr->tkwin)) {
+	Tk_SetBackgroundFromBorder(butPtr->tkwin, butPtr->activeBorder);
+    } else {
+	Tk_SetBackgroundFromBorder(butPtr->tkwin, butPtr->normalBorder);
+	if ((butPtr->state != tkNormalUid) && (butPtr->state != tkActiveUid)
+		&& (butPtr->state != tkDisabledUid)) {
+	    Tcl_AppendResult(interp, "bad state value \"", butPtr->state,
+		    "\": must be normal, active, or disabled", (char *) NULL);
+	    butPtr->state = tkNormalUid;
+	    return TCL_ERROR;
+	}
+    }
+
+    if ((butPtr->defaultState != tkActiveUid)
+	    && (butPtr->defaultState != tkDisabledUid)
+	    && (butPtr->defaultState != tkNormalUid)) {
+	Tcl_AppendResult(interp, "bad -default value \"", butPtr->defaultState,
+		"\": must be normal, active, or disabled", (char *) NULL);
+	butPtr->defaultState = tkDisabledUid;
+	return TCL_ERROR;
+    }
+
+    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) {
+	char *value;
+
+	if (butPtr->selVarName == NULL) {
+	    butPtr->selVarName = (char *) ckalloc((unsigned)
+		    (strlen(Tk_Name(butPtr->tkwin)) + 1));
+	    strcpy(butPtr->selVarName, Tk_Name(butPtr->tkwin));
+	}
+
+	/*
+	 * 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.
+	 */
+
+	value = Tcl_GetVar(interp, butPtr->selVarName, TCL_GLOBAL_ONLY);
+	butPtr->flags &= ~SELECTED;
+	if (value != NULL) {
+	    if (strcmp(value, butPtr->onValue) == 0) {
+		butPtr->flags |= SELECTED;
+	    }
+	} else {
+	    if (Tcl_SetVar(interp, butPtr->selVarName,
+		    (butPtr->type == TYPE_CHECK_BUTTON) ? butPtr->offValue : "",
+		    TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+		return TCL_ERROR;
+	    }
+	}
+	Tcl_TraceVar(interp, butPtr->selVarName,
+		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		ButtonVarProc, (ClientData) butPtr);
+    }
+
+    /*
+     * 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->imageString != NULL) {
+	image = Tk_GetImage(butPtr->interp, butPtr->tkwin,
+		butPtr->imageString, ButtonImageProc, (ClientData) butPtr);
+	if (image == NULL) {
+	    return TCL_ERROR;
+	}
+    } else {
+	image = NULL;
+    }
+    if (butPtr->image != NULL) {
+	Tk_FreeImage(butPtr->image);
+    }
+    butPtr->image = image;
+    if (butPtr->selectImageString != NULL) {
+	image = Tk_GetImage(butPtr->interp, butPtr->tkwin,
+		butPtr->selectImageString, ButtonSelectImageProc,
+		(ClientData) butPtr);
+	if (image == NULL) {
+	    return TCL_ERROR;
+	}
+    } else {
+	image = NULL;
+    }
+    if (butPtr->selectImage != NULL) {
+	Tk_FreeImage(butPtr->selectImage);
+    }
+    butPtr->selectImage = image;
+
+    if ((butPtr->image == NULL) && (butPtr->bitmap == None)
+	    && (butPtr->textVarName != 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.
+	 */
+
+	char *value;
+
+	value = Tcl_GetVar(interp, butPtr->textVarName, TCL_GLOBAL_ONLY);
+	if (value == NULL) {
+	    if (Tcl_SetVar(interp, butPtr->textVarName, butPtr->text,
+		    TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+		return TCL_ERROR;
+	    }
+	} else {
+	    if (butPtr->text != NULL) {
+		ckfree(butPtr->text);
+	    }
+	    butPtr->text = (char *) ckalloc((unsigned) (strlen(value) + 1));
+	    strcpy(butPtr->text, value);
+	}
+	Tcl_TraceVar(interp, butPtr->textVarName,
+		TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		ButtonTextVarProc, (ClientData) butPtr);
+    }
+
+    if ((butPtr->bitmap != None) || (butPtr->image != NULL)) {
+	if (Tk_GetPixels(interp, butPtr->tkwin, butPtr->widthString,
+		&butPtr->width) != TCL_OK) {
+	    widthError:
+	    Tcl_AddErrorInfo(interp, "\n    (processing -width option)");
+	    return TCL_ERROR;
+	}
+	if (Tk_GetPixels(interp, butPtr->tkwin, butPtr->heightString,
+		&butPtr->height) != TCL_OK) {
+	    heightError:
+	    Tcl_AddErrorInfo(interp, "\n    (processing -height option)");
+	    return TCL_ERROR;
+	}
+    } else {
+	if (Tcl_GetInt(interp, butPtr->widthString, &butPtr->width)
+		!= TCL_OK) {
+	    goto widthError;
+	}
+	if (Tcl_GetInt(interp, butPtr->heightString, &butPtr->height)
+		!= TCL_OK) {
+	    goto heightError;
+	}
+    }
+    
+    TkButtonWorldChanged((ClientData) butPtr);
+    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.font = Tk_FontId(butPtr->tkfont);
+	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;
+    }
+
+    if (butPtr->type != TYPE_LABEL) {
+	gcValues.font = Tk_FontId(butPtr->tkfont);
+	gcValues.background = Tk_3DBorderColor(butPtr->normalBorder)->pixel;
+	if ((butPtr->disabledFg != NULL) && (butPtr->imageString == 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, 
+			Tk_GetUid("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) {
+	TkpDestroyButton(butPtr);
+	if (butPtr->tkwin != NULL) {
+	    butPtr->tkwin = NULL;
+            Tcl_DeleteCommandFromToken(butPtr->interp, butPtr->widgetCmd);
+	}
+	if (butPtr->flags & REDRAW_PENDING) {
+	    Tcl_CancelIdleCall(TkpDisplayButton, (ClientData) butPtr);
+	}
+	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;
+    Tk_Window tkwin = butPtr->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) {
+	butPtr->tkwin = NULL;
+	Tk_DestroyWindow(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
+ *	interp->result.
+ *
+ * Side effects:
+ *	Depends on the button and its associated command.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TkInvokeButton(butPtr)
+    register TkButton *butPtr;		/* Information about button. */
+{
+    if (butPtr->type == TYPE_CHECK_BUTTON) {
+	if (butPtr->flags & SELECTED) {
+	    if (Tcl_SetVar(butPtr->interp, butPtr->selVarName, butPtr->offValue,
+		    TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+		return TCL_ERROR;
+	    }
+	} else {
+	    if (Tcl_SetVar(butPtr->interp, butPtr->selVarName, butPtr->onValue,
+		    TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+		return TCL_ERROR;
+	    }
+	}
+    } else if (butPtr->type == TYPE_RADIO_BUTTON) {
+	if (Tcl_SetVar(butPtr->interp, butPtr->selVarName, butPtr->onValue,
+		TCL_GLOBAL_ONLY|TCL_LEAVE_ERR_MSG) == NULL) {
+	    return TCL_ERROR;
+	}
+    }
+    if ((butPtr->type != TYPE_LABEL) && (butPtr->command != NULL)) {
+	return TkCopyAndGlobalEval(butPtr->interp, butPtr->command);
+    }
+    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 *value;
+
+    /*
+     * 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, butPtr->selVarName,
+		    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.
+     */
+
+    value = Tcl_GetVar(interp, butPtr->selVarName, TCL_GLOBAL_ONLY);
+    if (value == NULL) {
+	value = "";
+    }
+    if (strcmp(value, butPtr->onValue) == 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. */
+{
+    register TkButton *butPtr = (TkButton *) 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, butPtr->textVarName, butPtr->text,
+		    TCL_GLOBAL_ONLY);
+	    Tcl_TraceVar(interp, butPtr->textVarName,
+		    TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
+		    ButtonTextVarProc, clientData);
+	}
+	return (char *) NULL;
+    }
+
+    value = Tcl_GetVar(interp, butPtr->textVarName, TCL_GLOBAL_ONLY);
+    if (value == NULL) {
+	value = "";
+    }
+    if (butPtr->text != NULL) {
+	ckfree(butPtr->text);
+    }
+    butPtr->text = (char *) ckalloc((unsigned) (strlen(value) + 1));
+    strcpy(butPtr->text, value);
+    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 of 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 of 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;
+    }
+}