/*
* tkMenubutton.c (CTk) --
*
* 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) 1994-1995 Sun Microsystems, Inc.
* Copyright (c) 1994-1995 Cleveland Clinic Foundation
*
* See the file "license.terms" for information on usage and redistribution
* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
*
* @(#) $Id: ctk.shar,v 1.50 1996/01/15 14:47:16 andrewm Exp andrewm $
*/
#include "tkPort.h"
#include "default.h"
#include "tkInt.h"
/*
* A data structure of the following type is kept for each
* widget managed by this file:
*/
typedef struct {
Tk_Window tkwin; /* Window that embodies the widget. NULL
* means that the window has been destroyed
* but the data structures haven't yet been
* cleaned up.*/
Tcl_Interp *interp; /* Interpreter associated with menubutton. */
Tcl_Command widgetCmd; /* Token for menubutton's widget command. */
char *menuName; /* Name of menu associated with widget.
* Malloc-ed. */
/*
* Information about what's displayed in the menu button:
*/
char *text; /* Text to display in button (malloc'ed)
* or NULL. */
int numChars; /* # of characters in text. */
int underline; /* Index of character to underline. */
char *textVarName; /* Name of variable (malloc'ed) or NULL.
* If non-NULL, button displays the contents
* of this variable. */
/*
* Information used when displaying widget:
*/
Tk_Uid state; /* State of button for display purposes:
* normal, active, or disabled. */
int borderWidth; /* Width of border. */
int width, height; /* If > 0, these specify dimensions to request
* for window, in characters for text and in
* pixels for bitmaps. In this case the actual
* size of the text string or bitmap is
* ignored in computing desired window size. */
int wrapLength; /* Line length (in pixels) at which to wrap
* onto next line. <= 0 means don't wrap
* except at newlines. */
int padX, padY; /* Extra space around text or bitmap (pixels
* on each side). */
Tk_Anchor anchor; /* Where text/bitmap should be displayed
* inside window region. */
Tk_Justify justify; /* Justification to use for multi-line text. */
int textWidth; /* Width needed to display text as requested,
* in pixels. */
int textHeight; /* Height needed to display text as requested,
* in pixels. */
int indicatorOn; /* Non-zero means display indicator; 0 means
* don't display. */
/*
* Miscellaneous information:
*/
char *takeFocus; /* Value of -takefocus option; not used in
* the C code, but used by keyboard traversal
* scripts. Malloc'ed, but may be NULL. */
int flags; /* Various flags; see below for
* definitions. */
} MenuButton;
/*
* Flag bits for buttons:
*
* REDRAW_PENDING: Non-zero means a DoWhenIdle handler
* has already been queued to redraw
* this window.
* POSTED: Non-zero means that the menu associated
* with this button has been posted (typically
* because of an active button press).
* GOT_FOCUS: Non-zero means this button currently
* has the input focus.
*/
#define REDRAW_PENDING 1
#define POSTED 2
#define GOT_FOCUS 4
/*
* The following constants define the dimensions of the cascade indicator,
* which is displayed if the "-indicatoron" option is true. The units for
* these options are pixels (characters).
*/
#define INDICATOR_WIDTH 1
/*
* Information used for parsing configuration specs:
*/
static Tk_ConfigSpec configSpecs[] = {
{TK_CONFIG_ANCHOR, "-anchor", "anchor", "Anchor",
DEF_MENUBUTTON_ANCHOR, Tk_Offset(MenuButton, anchor), 0},
{TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *) NULL,
(char *) NULL, 0, 0},
{TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
DEF_MENUBUTTON_BORDER_WIDTH, Tk_Offset(MenuButton, borderWidth), 0},
{TK_CONFIG_INT, "-height", "height", "Height",
DEF_MENUBUTTON_HEIGHT, Tk_Offset(MenuButton, height), 0},
{TK_CONFIG_BOOLEAN, "-indicatoron", "indicatorOn", "IndicatorOn",
DEF_MENUBUTTON_INDICATOR, Tk_Offset(MenuButton, indicatorOn), 0},
{TK_CONFIG_JUSTIFY, "-justify", "justify", "Justify",
DEF_MENUBUTTON_JUSTIFY, Tk_Offset(MenuButton, justify), 0},
{TK_CONFIG_STRING, "-menu", "menu", "Menu",
DEF_MENUBUTTON_MENU, Tk_Offset(MenuButton, menuName),
TK_CONFIG_NULL_OK},
{TK_CONFIG_PIXELS, "-padx", "padX", "Pad",
DEF_MENUBUTTON_PADX, Tk_Offset(MenuButton, padX), 0},
{TK_CONFIG_PIXELS, "-pady", "padY", "Pad",
DEF_MENUBUTTON_PADY, Tk_Offset(MenuButton, padY), 0},
{TK_CONFIG_UID, "-state", "state", "State",
DEF_MENUBUTTON_STATE, Tk_Offset(MenuButton, state), 0},
{TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
DEF_MENUBUTTON_TAKE_FOCUS, Tk_Offset(MenuButton, takeFocus),
TK_CONFIG_NULL_OK},
{TK_CONFIG_STRING, "-text", "text", "Text",
DEF_MENUBUTTON_TEXT, Tk_Offset(MenuButton, text), 0},
{TK_CONFIG_STRING, "-textvariable", "textVariable", "Variable",
DEF_MENUBUTTON_TEXT_VARIABLE, Tk_Offset(MenuButton, textVarName),
TK_CONFIG_NULL_OK},
{TK_CONFIG_INT, "-underline", "underline", "Underline",
DEF_MENUBUTTON_UNDERLINE, Tk_Offset(MenuButton, underline), 0},
{TK_CONFIG_INT, "-width", "width", "Width",
DEF_MENUBUTTON_WIDTH, Tk_Offset(MenuButton, width), 0},
{TK_CONFIG_PIXELS, "-wraplength", "wrapLength", "WrapLength",
DEF_MENUBUTTON_WRAP_LENGTH, Tk_Offset(MenuButton, wrapLength), 0},
{TK_CONFIG_END, (char *) NULL, (char *) NULL, (char *) NULL,
(char *) NULL, 0, 0}
};
/*
* Forward declarations for procedures defined later in this file:
*/
static void ComputeMenuButtonGeometry _ANSI_ARGS_((
MenuButton *mbPtr));
static void MenuButtonCmdDeletedProc _ANSI_ARGS_((
ClientData clientData));
static void MenuButtonEventProc _ANSI_ARGS_((ClientData clientData,
XEvent *eventPtr));
static char * MenuButtonTextVarProc _ANSI_ARGS_((
ClientData clientData, Tcl_Interp *interp,
char *name1, char *name2, int flags));
static int MenuButtonWidgetCmd _ANSI_ARGS_((ClientData clientData,
Tcl_Interp *interp, int argc, char **argv));
static int ConfigureMenuButton _ANSI_ARGS_((Tcl_Interp *interp,
MenuButton *mbPtr, int argc, char **argv,
int flags));
static void DestroyMenuButton _ANSI_ARGS_((ClientData clientData));
static void DisplayMenuButton _ANSI_ARGS_((ClientData clientData));
/*
*--------------------------------------------------------------
*
* Tk_MenubuttonCmd --
*
* 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_MenubuttonCmd(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. */
{
register MenuButton *mbPtr;
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;
}
/*
* Initialize the data structure for the button.
*/
mbPtr = (MenuButton *) ckalloc(sizeof(MenuButton));
mbPtr->tkwin = new;
mbPtr->interp = interp;
mbPtr->widgetCmd = Tcl_CreateCommand(interp, Tk_PathName(mbPtr->tkwin),
MenuButtonWidgetCmd, (ClientData) mbPtr, MenuButtonCmdDeletedProc);
mbPtr->menuName = NULL;
mbPtr->text = NULL;
mbPtr->numChars = 0;
mbPtr->underline = -1;
mbPtr->textVarName = NULL;
mbPtr->state = tkNormalUid;
mbPtr->borderWidth = 0;
mbPtr->width = 0;
mbPtr->height = 0;
mbPtr->wrapLength = 0;
mbPtr->padX = 0;
mbPtr->padY = 0;
mbPtr->anchor = TK_ANCHOR_CENTER;
mbPtr->justify = TK_JUSTIFY_CENTER;
mbPtr->indicatorOn = 0;
mbPtr->takeFocus = NULL;
mbPtr->flags = 0;
Tk_SetClass(mbPtr->tkwin, "Menubutton");
Tk_CreateEventHandler(mbPtr->tkwin,
CTK_EXPOSE_EVENT_MASK|CTK_DESTROY_EVENT_MASK|CTK_FOCUS_EVENT_MASK,
MenuButtonEventProc, (ClientData) mbPtr);
if (ConfigureMenuButton(interp, mbPtr, argc-2, argv+2, 0) != TCL_OK) {
Tk_DestroyWindow(mbPtr->tkwin);
return TCL_ERROR;
}
Tcl_SetResult(interp,Tk_PathName(mbPtr->tkwin),TCL_VOLATILE);
return TCL_OK;
}
/*
*--------------------------------------------------------------
*
* MenuButtonWidgetCmd --
*
* 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
MenuButtonWidgetCmd(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 MenuButton *mbPtr = (MenuButton *) clientData;
int result = TCL_OK;
size_t length;
int c;
if (argc < 2) {
Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0],
" option ?arg arg ...?\"", (char *) NULL);
return TCL_ERROR;
}
Tk_Preserve((ClientData) mbPtr);
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, mbPtr->tkwin, configSpecs,
(char *) mbPtr, argv[2], 0);
} else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
&& (length >= 2)) {
if (argc == 2) {
result = Tk_ConfigureInfo(interp, mbPtr->tkwin, configSpecs,
(char *) mbPtr, (char *) NULL, 0);
} else if (argc == 3) {
result = Tk_ConfigureInfo(interp, mbPtr->tkwin, configSpecs,
(char *) mbPtr, argv[2], 0);
} else {
result = ConfigureMenuButton(interp, mbPtr, argc-2, argv+2,
TK_CONFIG_ARGV_ONLY);
}
} else {
Tcl_AppendResult(interp, "bad option \"", argv[1],
"\": must be cget or configure",
(char *) NULL);
goto error;
}
Tk_Release((ClientData) mbPtr);
return result;
error:
Tk_Release((ClientData) mbPtr);
return TCL_ERROR;
}
/*
*----------------------------------------------------------------------
*
* DestroyMenuButton --
*
* This procedure is invoked to recycle all of the resources
* associated with a button widget. It is invoked as a
* when-idle handler in order to make sure that there is no
* other use of the button pending at the time of the deletion.
*
* Results:
* None.
*
* Side effects:
* Everything associated with the widget is freed up.
*
*----------------------------------------------------------------------
*/
static void
DestroyMenuButton(clientData)
ClientData clientData; /* Info about button widget. */
{
register MenuButton *mbPtr = (MenuButton *) clientData;
/*
* Free up all the stuff that requires special handling, then
* let Tk_FreeOptions handle all the standard option-related
* stuff.
*/
if (mbPtr->textVarName != NULL) {
Tcl_UntraceVar(mbPtr->interp, mbPtr->textVarName,
TCL_GLOBAL_ONLY|TCL_TRACE_WRITES|TCL_TRACE_UNSETS,
MenuButtonTextVarProc, (ClientData) mbPtr);
}
Tk_FreeOptions(configSpecs, (char *) mbPtr, 0);
ckfree((char *) mbPtr);
}
/*
*----------------------------------------------------------------------
*
* 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 interp->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, argc, argv, flags)
Tcl_Interp *interp; /* Used for error reporting. */
register MenuButton *mbPtr; /* 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. */
{
int result;
/*
* 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);
}
result = Tk_ConfigureWidget(interp, mbPtr->tkwin, configSpecs,
argc, argv, (char *) mbPtr, flags);
if (result != TCL_OK) {
return TCL_ERROR;
}
/*
* A few options need special processing.
*/
if ((mbPtr->state != tkNormalUid) && (mbPtr->state != tkActiveUid)
&& (mbPtr->state != tkDisabledUid)) {
Tcl_AppendResult(interp, "bad state value \"", mbPtr->state,
"\": must be normal, active, or disabled", (char *) NULL);
mbPtr->state = tkNormalUid;
return TCL_ERROR;
}
if (mbPtr->padX < 0) {
mbPtr->padX = 0;
}
if (mbPtr->padY < 0) {
mbPtr->padY = 0;
}
if (mbPtr->textVarName != NULL) {
/*
* The menubutton displays a variable. Set up a trace to watch
* for any changes in it.
*/
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);
}
/*
* Recompute the geometry for the button.
*/
ComputeMenuButtonGeometry(mbPtr);
/*
* Lastly, arrange for the button to be redisplayed.
*/
if (Tk_IsMapped(mbPtr->tkwin) && !(mbPtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
mbPtr->flags |= REDRAW_PENDING;
}
return TCL_OK;
}
/*
*----------------------------------------------------------------------
*
* DisplayMenuButton --
*
* This procedure is invoked to display a menubutton widget.
*
* Results:
* None.
*
* Side effects:
* Commands are output to X to display the menubutton in its
* current mode.
*
*----------------------------------------------------------------------
*/
static void
DisplayMenuButton(clientData)
ClientData clientData; /* Information about widget. */
{
register MenuButton *mbPtr = (MenuButton *) clientData;
register Tk_Window tkwin = mbPtr->tkwin;
Ctk_Style style;
int x, y;
unsigned int width = Tk_Width(tkwin);
unsigned int height = Tk_Height(tkwin);
int indicatorSpace = (mbPtr->indicatorOn) ? INDICATOR_WIDTH : 0;
mbPtr->flags &= ~REDRAW_PENDING;
if ((tkwin == NULL) || !Tk_IsMapped(tkwin)) {
return;
}
style = (mbPtr->state == tkDisabledUid)
? CTK_DISABLED_STYLE : CTK_BUTTON_STYLE;
switch (mbPtr->anchor) {
case TK_ANCHOR_NW: case TK_ANCHOR_W: case TK_ANCHOR_SW:
x = mbPtr->borderWidth + mbPtr->padX;
break;
case TK_ANCHOR_N: case TK_ANCHOR_CENTER: case TK_ANCHOR_S:
x = (width - indicatorSpace - mbPtr->textWidth)/2;
break;
default:
x = width - mbPtr->borderWidth - mbPtr->padX - indicatorSpace
- mbPtr->textWidth;
break;
}
switch (mbPtr->anchor) {
case TK_ANCHOR_NW: case TK_ANCHOR_N: case TK_ANCHOR_NE:
y = mbPtr->borderWidth + mbPtr->padY;
break;
case TK_ANCHOR_W: case TK_ANCHOR_CENTER: case TK_ANCHOR_E:
y = (height - mbPtr->textHeight)/2;
break;
default:
y = height - mbPtr->borderWidth - mbPtr->padY - mbPtr->textHeight;
break;
}
/*
* Clear rect.
*/
Ctk_FillRect(tkwin, 0, 0, width, height, style, ' ');
/*
* Draw text.
*/
TkDisplayText(tkwin, style, mbPtr->text, mbPtr->numChars,
x, y, mbPtr->textWidth, mbPtr->justify, mbPtr->underline);
/*
* Draw Indicator.
*/
if (indicatorSpace) {
x = width - mbPtr->borderWidth - mbPtr->padX - indicatorSpace;
y += mbPtr->textHeight/2;
Ctk_DrawCharacter(tkwin, x, y, style, '^');
}
/*
* Draw border.
*/
Ctk_DrawBorder(tkwin, style, (char *)NULL);
/*
* Position cursor.
*/
if (mbPtr->flags & GOT_FOCUS) {
Ctk_SetCursor(tkwin, mbPtr->borderWidth, mbPtr->borderWidth);
}
}
/*
*--------------------------------------------------------------
*
* 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. */
{
MenuButton *mbPtr = (MenuButton *) clientData;
if (eventPtr->type == CTK_EXPOSE_EVENT) {
if ((mbPtr->tkwin != NULL) && !(mbPtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
mbPtr->flags |= REDRAW_PENDING;
}
} else if (eventPtr->type == CTK_DESTROY_EVENT) {
if (mbPtr->tkwin != NULL) {
mbPtr->tkwin = NULL;
Tcl_DeleteCommand(mbPtr->interp,
Tcl_GetCommandName(mbPtr->interp, mbPtr->widgetCmd));
}
if (mbPtr->flags & REDRAW_PENDING) {
Tcl_CancelIdleCall(DisplayMenuButton, (ClientData) mbPtr);
}
Tk_EventuallyFree((ClientData) mbPtr, DestroyMenuButton);
} else if (eventPtr->type == CTK_FOCUS_EVENT) {
mbPtr->flags |= GOT_FOCUS;
Ctk_SetCursor(mbPtr->tkwin, mbPtr->borderWidth, mbPtr->borderWidth);
} else if (eventPtr->type == CTK_UNFOCUS_EVENT) {
mbPtr->flags &= ~GOT_FOCUS;
}
}
/*
*----------------------------------------------------------------------
*
* 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. */
{
MenuButton *mbPtr = (MenuButton *) 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) {
mbPtr->tkwin = NULL;
Tk_DestroyWindow(tkwin);
}
}
/*
*----------------------------------------------------------------------
*
* ComputeMenuButtonGeometry --
*
* After changes in a menu button's text or bitmap, this procedure
* recomputes the menu button's geometry and passes this information
* along to the geometry manager for the window.
*
* Results:
* None.
*
* Side effects:
* The menu button's window may change size.
*
*----------------------------------------------------------------------
*/
static void
ComputeMenuButtonGeometry(mbPtr)
register MenuButton *mbPtr; /* Widget record for menu button. */
{
int width, height;
int indicatorSpace = (mbPtr->indicatorOn) ? INDICATOR_WIDTH : 0;
mbPtr->numChars = strlen(mbPtr->text);
TkComputeTextGeometry(mbPtr->text, mbPtr->numChars,
mbPtr->wrapLength,
&mbPtr->textWidth, &mbPtr->textHeight);
width = mbPtr->width;
if (width < 0) {
width = mbPtr->textWidth;
}
height = mbPtr->height;
if (height < 0) {
height = mbPtr->textHeight;
}
width += 2*mbPtr->padX;
height += 2*mbPtr->padY;
Tk_GeometryRequest(mbPtr->tkwin,
width + indicatorSpace + 2*mbPtr->borderWidth,
height + 2*mbPtr->borderWidth);
}
/*
*--------------------------------------------------------------
*
* 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 MenuButton *mbPtr = (MenuButton *) 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);
ComputeMenuButtonGeometry(mbPtr);
if ((mbPtr->tkwin != NULL) && Tk_IsMapped(mbPtr->tkwin)
&& !(mbPtr->flags & REDRAW_PENDING)) {
Tcl_DoWhenIdle(DisplayMenuButton, (ClientData) mbPtr);
mbPtr->flags |= REDRAW_PENDING;
}
return (char *) NULL;
}