--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/include/tk.h	Tue Mar 18 17:55:14 2025 -0400
@@ -0,0 +1,1635 @@
+/*
+ * tk.h --
+ *
+ *	Declarations for Tk-related things that are visible outside of the Tk
+ *	module itself.
+ *
+ * Copyright (c) 1989-1994 The Regents of the University of California.
+ * Copyright (c) 1994 The Australian National University.
+ * Copyright (c) 1994-1998 Sun Microsystems, Inc.
+ * Copyright (c) 1998-2000 Ajuba Solutions.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _TK
+#define _TK
+
+#include <tcl.h>
+#if (TCL_MAJOR_VERSION != 8) || (TCL_MINOR_VERSION < 6)
+#	error Tk 8.6 must be compiled with tcl.h from Tcl 8.6 or better
+#endif
+
+#ifndef CONST84
+#   define CONST84 const
+#   define CONST84_RETURN const
+#endif
+#ifndef CONST86
+#   define CONST86 CONST84
+#endif
+#ifndef EXTERN
+#   define EXTERN extern TCL_STORAGE_CLASS
+#endif
+
+/*
+ * Utility macros: STRINGIFY takes an argument and wraps it in "" (double
+ * quotation marks), JOIN joins two arguments.
+ */
+
+#ifndef STRINGIFY
+#  define STRINGIFY(x) STRINGIFY1(x)
+#  define STRINGIFY1(x) #x
+#endif
+#ifndef JOIN
+#  define JOIN(a,b) JOIN1(a,b)
+#  define JOIN1(a,b) a##b
+#endif
+
+/*
+ * For C++ compilers, use extern "C"
+ */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * When version numbers change here, you must also go into the following files
+ * and update the version numbers:
+ *
+ * library/tk.tcl	(1 LOC patch)
+ * unix/configure.in	(2 LOC Major, 2 LOC minor, 1 LOC patch)
+ * win/configure.in	(as above)
+ * README		(sections 0 and 1)
+ * macosx/Tk-Common.xcconfig (not patchlevel) 1 LOC
+ * win/README		(not patchlevel)
+ * unix/README		(not patchlevel)
+ * unix/tk.spec		(1 LOC patch)
+ * win/tcl.m4		(not patchlevel)
+ *
+ * You may also need to update some of these files when the numbers change for
+ * the version of Tcl that this release of Tk is compiled against.
+ */
+
+#define TK_MAJOR_VERSION	8
+#define TK_MINOR_VERSION	6
+#define TK_RELEASE_LEVEL	TCL_FINAL_RELEASE
+#define TK_RELEASE_SERIAL	13
+
+#define TK_VERSION		"8.6"
+#define TK_PATCH_LEVEL		"8.6.13"
+
+/*
+ * A special definition used to allow this header file to be included from
+ * windows or mac resource files so that they can obtain version information.
+ * RC_INVOKED is defined by default by the windows RC tool and manually set
+ * for macintosh.
+ *
+ * Resource compilers don't like all the C stuff, like typedefs and procedure
+ * declarations, that occur below, so block them out.
+ */
+
+#ifndef RC_INVOKED
+
+#if !defined(_XLIB_H) && !defined(_X11_XLIB_H_)
+#if defined(__GNUC__) && !defined(__cplusplus)
+#   pragma GCC diagnostic ignored "-Wc++-compat"
+#endif
+#   include <X11/Xlib.h>
+#   ifdef MAC_OSX_TK
+#	include <X11/X.h>
+#   endif
+#endif
+#if defined(STDC_HEADERS) || defined(__STDC__) || defined(__C99__FUNC__) \
+     || defined(__cplusplus) || defined(_MSC_VER) || defined(__ICC)
+#   include <stddef.h>
+#endif
+
+#ifdef BUILD_tk
+#undef TCL_STORAGE_CLASS
+#define TCL_STORAGE_CLASS	DLLEXPORT
+#endif
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Decide whether or not to use input methods.
+ */
+
+#ifdef XNQueryInputStyle
+#define TK_USE_INPUT_METHODS
+#endif
+
+/*
+ * Dummy types that are used by clients:
+ */
+
+#define Tk_ImageModel Tk_ImageMaster
+typedef struct Tk_BindingTable_ *Tk_BindingTable;
+typedef struct Tk_Canvas_ *Tk_Canvas;
+typedef struct Tk_Cursor_ *Tk_Cursor;
+typedef struct Tk_ErrorHandler_ *Tk_ErrorHandler;
+typedef struct Tk_Font_ *Tk_Font;
+typedef struct Tk_Image__ *Tk_Image;
+typedef struct Tk_ImageMaster_ *Tk_ImageMaster;
+typedef struct Tk_OptionTable_ *Tk_OptionTable;
+typedef struct Tk_PostscriptInfo_ *Tk_PostscriptInfo;
+typedef struct Tk_TextLayout_ *Tk_TextLayout;
+typedef struct Tk_Window_ *Tk_Window;
+typedef struct Tk_3DBorder_ *Tk_3DBorder;
+typedef struct Tk_Style_ *Tk_Style;
+typedef struct Tk_StyleEngine_ *Tk_StyleEngine;
+typedef struct Tk_StyledElement_ *Tk_StyledElement;
+
+/*
+ * Additional types exported to clients.
+ */
+
+typedef const char *Tk_Uid;
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * The enum below defines the valid types for Tk configuration options as
+ * implemented by Tk_InitOptions, Tk_SetOptions, etc.
+ */
+
+typedef enum {
+    TK_OPTION_BOOLEAN,
+    TK_OPTION_INT,
+    TK_OPTION_DOUBLE,
+    TK_OPTION_STRING,
+    TK_OPTION_STRING_TABLE,
+    TK_OPTION_COLOR,
+    TK_OPTION_FONT,
+    TK_OPTION_BITMAP,
+    TK_OPTION_BORDER,
+    TK_OPTION_RELIEF,
+    TK_OPTION_CURSOR,
+    TK_OPTION_JUSTIFY,
+    TK_OPTION_ANCHOR,
+    TK_OPTION_SYNONYM,
+    TK_OPTION_PIXELS,
+    TK_OPTION_WINDOW,
+    TK_OPTION_END,
+    TK_OPTION_CUSTOM,
+    TK_OPTION_STYLE
+} Tk_OptionType;
+
+/*
+ * Structures of the following type are used by widgets to specify their
+ * configuration options. Typically each widget has a static array of these
+ * structures, where each element of the array describes a single
+ * configuration option. The array is passed to Tk_CreateOptionTable.
+ */
+
+typedef struct Tk_OptionSpec {
+    Tk_OptionType type;		/* Type of option, such as TK_OPTION_COLOR;
+				 * see definitions above. Last option in table
+				 * must have type TK_OPTION_END. */
+    const char *optionName;	/* Name used to specify option in Tcl
+				 * commands. */
+    const char *dbName;		/* Name for option in option database. */
+    const char *dbClass;	/* Class for option in database. */
+    const char *defValue;	/* Default value for option if not specified
+				 * in command line, the option database, or
+				 * the system. */
+    int objOffset;		/* Where in record to store a Tcl_Obj * that
+				 * holds the value of this option, specified
+				 * as an offset in bytes from the start of the
+				 * record. Use the Tk_Offset macro to generate
+				 * values for this. -1 means don't store the
+				 * Tcl_Obj in the record. */
+    int internalOffset;		/* Where in record to store the internal
+				 * representation of the value of this option,
+				 * such as an int or XColor *. This field is
+				 * specified as an offset in bytes from the
+				 * start of the record. Use the Tk_Offset
+				 * macro to generate values for it. -1 means
+				 * don't store the internal representation in
+				 * the record. */
+    int flags;			/* Any combination of the values defined
+				 * below. */
+    const void *clientData;	/* An alternate place to put option-specific
+				 * data. Used for the monochrome default value
+				 * for colors, etc. */
+    int typeMask;		/* An arbitrary bit mask defined by the class
+				 * manager; typically bits correspond to
+				 * certain kinds of options such as all those
+				 * that require a redisplay when they change.
+				 * Tk_SetOptions returns the bit-wise OR of
+				 * the typeMasks of all options that were
+				 * changed. */
+} Tk_OptionSpec;
+
+/*
+ * Flag values for Tk_OptionSpec structures. These flags are shared by
+ * Tk_ConfigSpec structures, so be sure to coordinate any changes carefully.
+ */
+
+#define TK_OPTION_NULL_OK		(1 << 0)
+#define TK_OPTION_DONT_SET_DEFAULT	(1 << 3)
+
+/*
+ * The following structure and function types are used by TK_OPTION_CUSTOM
+ * options; the structure holds pointers to the functions needed by the Tk
+ * option config code to handle a custom option.
+ */
+
+typedef int (Tk_CustomOptionSetProc) (ClientData clientData,
+	Tcl_Interp *interp, Tk_Window tkwin, Tcl_Obj **value, char *widgRec,
+	int offset, char *saveInternalPtr, int flags);
+typedef Tcl_Obj *(Tk_CustomOptionGetProc) (ClientData clientData,
+	Tk_Window tkwin, char *widgRec, int offset);
+typedef void (Tk_CustomOptionRestoreProc) (ClientData clientData,
+	Tk_Window tkwin, char *internalPtr, char *saveInternalPtr);
+typedef void (Tk_CustomOptionFreeProc) (ClientData clientData, Tk_Window tkwin,
+	char *internalPtr);
+
+typedef struct Tk_ObjCustomOption {
+    const char *name;		/* Name of the custom option. */
+    Tk_CustomOptionSetProc *setProc;
+				/* Function to use to set a record's option
+				 * value from a Tcl_Obj */
+    Tk_CustomOptionGetProc *getProc;
+				/* Function to use to get a Tcl_Obj
+				 * representation from an internal
+				 * representation of an option. */
+    Tk_CustomOptionRestoreProc *restoreProc;
+				/* Function to use to restore a saved value
+				 * for the internal representation. */
+    Tk_CustomOptionFreeProc *freeProc;
+				/* Function to use to free the internal
+				 * representation of an option. */
+    ClientData clientData;	/* Arbitrary one-word value passed to the
+				 * handling procs. */
+} Tk_ObjCustomOption;
+
+/*
+ * Macro to use to fill in "offset" fields of the Tk_OptionSpec structure.
+ * Computes number of bytes from beginning of structure to a given field.
+ */
+
+#define Tk_Offset(type, field) ((int) offsetof(type, field))
+/* Workaround for platforms missing offsetof(), e.g. VC++ 6.0 */
+#ifndef offsetof
+#   define offsetof(type, field) ((size_t) ((char *) &((type *) 0)->field))
+#endif
+
+/*
+ * The following two structures are used for error handling. When config
+ * options are being modified, the old values are saved in a Tk_SavedOptions
+ * structure. If an error occurs, then the contents of the structure can be
+ * used to restore all of the old values. The contents of this structure are
+ * for the private use Tk. No-one outside Tk should ever read or write any of
+ * the fields of these structures.
+ */
+
+typedef struct Tk_SavedOption {
+    struct TkOption *optionPtr;	/* Points to information that describes the
+				 * option. */
+    Tcl_Obj *valuePtr;		/* The old value of the option, in the form of
+				 * a Tcl object; may be NULL if the value was
+				 * not saved as an object. */
+    double internalForm;	/* The old value of the option, in some
+				 * internal representation such as an int or
+				 * (XColor *). Valid only if the field
+				 * optionPtr->specPtr->objOffset is < 0. The
+				 * space must be large enough to accommodate a
+				 * double, a long, or a pointer; right now it
+				 * looks like a double (i.e., 8 bytes) is big
+				 * enough. Also, using a double guarantees
+				 * that the field is properly aligned for
+				 * storing large values. */
+} Tk_SavedOption;
+
+#ifdef TCL_MEM_DEBUG
+#   define TK_NUM_SAVED_OPTIONS 2
+#else
+#   define TK_NUM_SAVED_OPTIONS 20
+#endif
+
+typedef struct Tk_SavedOptions {
+    char *recordPtr;		/* The data structure in which to restore
+				 * configuration options. */
+    Tk_Window tkwin;		/* Window associated with recordPtr; needed to
+				 * restore certain options. */
+    int numItems;		/* The number of valid items in items field. */
+    Tk_SavedOption items[TK_NUM_SAVED_OPTIONS];
+				/* Items used to hold old values. */
+    struct Tk_SavedOptions *nextPtr;
+				/* Points to next structure in list; needed if
+				 * too many options changed to hold all the
+				 * old values in a single structure. NULL
+				 * means no more structures. */
+} Tk_SavedOptions;
+
+/*
+ * Structure used to describe application-specific configuration options:
+ * indicates procedures to call to parse an option and to return a text string
+ * describing an option. THESE ARE DEPRECATED; PLEASE USE THE NEW STRUCTURES
+ * LISTED ABOVE.
+ */
+
+/*
+ * This is a temporary flag used while tkObjConfig and new widgets are in
+ * development.
+ */
+
+#ifndef __NO_OLD_CONFIG
+
+typedef int (Tk_OptionParseProc) (ClientData clientData, Tcl_Interp *interp,
+	Tk_Window tkwin, CONST84 char *value, char *widgRec, int offset);
+typedef CONST86 char *(Tk_OptionPrintProc) (ClientData clientData,
+	Tk_Window tkwin, char *widgRec, int offset, Tcl_FreeProc **freeProcPtr);
+
+typedef struct Tk_CustomOption {
+    Tk_OptionParseProc *parseProc;
+				/* Procedure to call to parse an option and
+				 * store it in converted form. */
+    Tk_OptionPrintProc *printProc;
+				/* Procedure to return a printable string
+				 * describing an existing option. */
+    ClientData clientData;	/* Arbitrary one-word value used by option
+				 * parser: passed to parseProc and
+				 * printProc. */
+} Tk_CustomOption;
+
+/*
+ * Structure used to specify information for Tk_ConfigureWidget. Each
+ * structure gives complete information for one option, including how the
+ * option is specified on the command line, where it appears in the option
+ * database, etc.
+ */
+
+typedef struct Tk_ConfigSpec {
+    int type;			/* Type of option, such as TK_CONFIG_COLOR;
+				 * see definitions below. Last option in table
+				 * must have type TK_CONFIG_END. */
+    CONST86 char *argvName;	/* Switch used to specify option in argv. NULL
+				 * means this spec is part of a group. */
+    Tk_Uid dbName;		/* Name for option in option database. */
+    Tk_Uid dbClass;		/* Class for option in database. */
+    Tk_Uid defValue;		/* Default value for option if not specified
+				 * in command line or database. */
+    int offset;			/* Where in widget record to store value; use
+				 * Tk_Offset macro to generate values for
+				 * this. */
+    int specFlags;		/* Any combination of the values defined
+				 * below; other bits are used internally by
+				 * tkConfig.c. */
+    CONST86 Tk_CustomOption *customPtr;
+				/* If type is TK_CONFIG_CUSTOM then this is a
+				 * pointer to info about how to parse and
+				 * print the option. Otherwise it is
+				 * irrelevant. */
+} Tk_ConfigSpec;
+
+/*
+ * Type values for Tk_ConfigSpec structures. See the user documentation for
+ * details.
+ */
+
+typedef enum {
+    TK_CONFIG_BOOLEAN, TK_CONFIG_INT, TK_CONFIG_DOUBLE, TK_CONFIG_STRING,
+    TK_CONFIG_UID, TK_CONFIG_COLOR, TK_CONFIG_FONT, TK_CONFIG_BITMAP,
+    TK_CONFIG_BORDER, TK_CONFIG_RELIEF, TK_CONFIG_CURSOR,
+    TK_CONFIG_ACTIVE_CURSOR, TK_CONFIG_JUSTIFY, TK_CONFIG_ANCHOR,
+    TK_CONFIG_SYNONYM, TK_CONFIG_CAP_STYLE, TK_CONFIG_JOIN_STYLE,
+    TK_CONFIG_PIXELS, TK_CONFIG_MM, TK_CONFIG_WINDOW, TK_CONFIG_CUSTOM,
+    TK_CONFIG_END
+} Tk_ConfigTypes;
+
+/*
+ * Possible values for flags argument to Tk_ConfigureWidget:
+ */
+
+#define TK_CONFIG_ARGV_ONLY	1
+#define TK_CONFIG_OBJS		0x80
+
+/*
+ * Possible flag values for Tk_ConfigSpec structures. Any bits at or above
+ * TK_CONFIG_USER_BIT may be used by clients for selecting certain entries.
+ * Before changing any values here, coordinate with tkOldConfig.c
+ * (internal-use-only flags are defined there).
+ */
+
+#define TK_CONFIG_NULL_OK		(1 << 0)
+#define TK_CONFIG_COLOR_ONLY		(1 << 1)
+#define TK_CONFIG_MONO_ONLY		(1 << 2)
+#define TK_CONFIG_DONT_SET_DEFAULT	(1 << 3)
+#define TK_CONFIG_OPTION_SPECIFIED      (1 << 4)
+#define TK_CONFIG_USER_BIT		0x100
+#endif /* __NO_OLD_CONFIG */
+
+/*
+ * Structure used to specify how to handle argv options.
+ */
+
+typedef struct {
+    CONST86 char *key;		/* The key string that flags the option in the
+				 * argv array. */
+    int type;			/* Indicates option type; see below. */
+    char *src;			/* Value to be used in setting dst; usage
+				 * depends on type. */
+    char *dst;			/* Address of value to be modified; usage
+				 * depends on type. */
+    CONST86 char *help;		/* Documentation message describing this
+				 * option. */
+} Tk_ArgvInfo;
+
+/*
+ * Legal values for the type field of a Tk_ArgvInfo: see the user
+ * documentation for details.
+ */
+
+#define TK_ARGV_CONSTANT		15
+#define TK_ARGV_INT			16
+#define TK_ARGV_STRING			17
+#define TK_ARGV_UID			18
+#define TK_ARGV_REST			19
+#define TK_ARGV_FLOAT			20
+#define TK_ARGV_FUNC			21
+#define TK_ARGV_GENFUNC			22
+#define TK_ARGV_HELP			23
+#define TK_ARGV_CONST_OPTION		24
+#define TK_ARGV_OPTION_VALUE		25
+#define TK_ARGV_OPTION_NAME_VALUE	26
+#define TK_ARGV_END			27
+
+/*
+ * Flag bits for passing to Tk_ParseArgv:
+ */
+
+#define TK_ARGV_NO_DEFAULTS		0x1
+#define TK_ARGV_NO_LEFTOVERS		0x2
+#define TK_ARGV_NO_ABBREV		0x4
+#define TK_ARGV_DONT_SKIP_FIRST_ARG	0x8
+
+/*
+ * Enumerated type for describing actions to be taken in response to a
+ * restrictProc established by Tk_RestrictEvents.
+ */
+
+typedef enum {
+    TK_DEFER_EVENT, TK_PROCESS_EVENT, TK_DISCARD_EVENT
+} Tk_RestrictAction;
+
+/*
+ * Priority levels to pass to Tk_AddOption:
+ */
+
+#define TK_WIDGET_DEFAULT_PRIO	20
+#define TK_STARTUP_FILE_PRIO	40
+#define TK_USER_DEFAULT_PRIO	60
+#define TK_INTERACTIVE_PRIO	80
+#define TK_MAX_PRIO		100
+
+/*
+ * Relief values returned by Tk_GetRelief:
+ */
+
+#define TK_RELIEF_NULL		-1
+#define TK_RELIEF_FLAT		0
+#define TK_RELIEF_GROOVE	1
+#define TK_RELIEF_RAISED	2
+#define TK_RELIEF_RIDGE		3
+#define TK_RELIEF_SOLID		4
+#define TK_RELIEF_SUNKEN	5
+
+/*
+ * "Which" argument values for Tk_3DBorderGC:
+ */
+
+#define TK_3D_FLAT_GC		1
+#define TK_3D_LIGHT_GC		2
+#define TK_3D_DARK_GC		3
+
+/*
+ * Special EnterNotify/LeaveNotify "mode" for use in events generated by
+ * tkShare.c. Pick a high enough value that it's unlikely to conflict with
+ * existing values (like NotifyNormal) or any new values defined in the
+ * future.
+ */
+
+#define TK_NOTIFY_SHARE		20
+
+/*
+ * Enumerated type for describing a point by which to anchor something:
+ */
+
+typedef enum {
+    TK_ANCHOR_N, TK_ANCHOR_NE, TK_ANCHOR_E, TK_ANCHOR_SE,
+    TK_ANCHOR_S, TK_ANCHOR_SW, TK_ANCHOR_W, TK_ANCHOR_NW,
+    TK_ANCHOR_CENTER
+} Tk_Anchor;
+
+/*
+ * Enumerated type for describing a style of justification:
+ */
+
+typedef enum {
+    TK_JUSTIFY_LEFT, TK_JUSTIFY_RIGHT, TK_JUSTIFY_CENTER
+} Tk_Justify;
+
+/*
+ * The following structure is used by Tk_GetFontMetrics() to return
+ * information about the properties of a Tk_Font.
+ */
+
+typedef struct Tk_FontMetrics {
+    int ascent;			/* The amount in pixels that the tallest
+				 * letter sticks up above the baseline, plus
+				 * any extra blank space added by the designer
+				 * of the font. */
+    int descent;		/* The largest amount in pixels that any
+				 * letter sticks below the baseline, plus any
+				 * extra blank space added by the designer of
+				 * the font. */
+    int linespace;		/* The sum of the ascent and descent. How far
+				 * apart two lines of text in the same font
+				 * should be placed so that none of the
+				 * characters in one line overlap any of the
+				 * characters in the other line. */
+} Tk_FontMetrics;
+
+/*
+ * Flags passed to Tk_MeasureChars:
+ */
+
+#define TK_WHOLE_WORDS		1
+#define TK_AT_LEAST_ONE		2
+#define TK_PARTIAL_OK		4
+
+/*
+ * Flags passed to Tk_ComputeTextLayout:
+ */
+
+#define TK_IGNORE_TABS		8
+#define TK_IGNORE_NEWLINES	16
+
+/*
+ * Widget class procedures used to implement platform specific widget
+ * behavior.
+ */
+
+typedef Window (Tk_ClassCreateProc) (Tk_Window tkwin, Window parent,
+	ClientData instanceData);
+typedef void (Tk_ClassWorldChangedProc) (ClientData instanceData);
+typedef void (Tk_ClassModalProc) (Tk_Window tkwin, XEvent *eventPtr);
+
+typedef struct Tk_ClassProcs {
+    unsigned int size;
+    Tk_ClassWorldChangedProc *worldChangedProc;
+				/* Procedure to invoke when the widget needs
+				 * to respond in some way to a change in the
+				 * world (font changes, etc.) */
+    Tk_ClassCreateProc *createProc;
+				/* Procedure to invoke when the platform-
+				 * dependent window needs to be created. */
+    Tk_ClassModalProc *modalProc;
+				/* Procedure to invoke after all bindings on a
+				 * widget have been triggered in order to
+				 * handle a modal loop. */
+} Tk_ClassProcs;
+
+/*
+ * Simple accessor for Tk_ClassProcs structure. Checks that the structure is
+ * not NULL, then checks the size field and returns either the requested
+ * field, if present, or NULL if the structure is too small to have the field
+ * (or NULL if the structure is NULL).
+ *
+ * A more general version of this function may be useful if other
+ * size-versioned structure pop up in the future:
+ *
+ *	#define Tk_GetField(name, who, which) \
+ *	    (((who) == NULL) ? NULL :
+ *	    (((who)->size <= Tk_Offset(name, which)) ? NULL :(name)->which))
+ */
+
+#define Tk_GetClassProc(procs, which) \
+    (((procs) == NULL) ? NULL : \
+    (((procs)->size <= Tk_Offset(Tk_ClassProcs, which)) ? NULL:(procs)->which))
+
+/*
+ * Each geometry manager (the packer, the placer, etc.) is represented by a
+ * structure of the following form, which indicates procedures to invoke in
+ * the geometry manager to carry out certain functions.
+ */
+
+#define Tk_GeomLostContentProc Tk_GeomLostSlaveProc
+typedef void (Tk_GeomRequestProc) (ClientData clientData, Tk_Window tkwin);
+typedef void (Tk_GeomLostContentProc) (ClientData clientData, Tk_Window tkwin);
+
+typedef struct Tk_GeomMgr {
+    const char *name;		/* Name of the geometry manager (command used
+				 * to invoke it, or name of widget class that
+				 * allows embedded widgets). */
+    Tk_GeomRequestProc *requestProc;
+				/* Procedure to invoke when a content's
+				 * requested geometry changes. */
+    Tk_GeomLostContentProc *lostSlaveProc;
+				/* Procedure to invoke when content is taken
+				 * away from one geometry manager by another.
+				 * NULL means geometry manager doesn't care
+				 * when content lost. */
+} Tk_GeomMgr;
+
+/*
+ * Result values returned by Tk_GetScrollInfo:
+ */
+
+#define TK_SCROLL_MOVETO	1
+#define TK_SCROLL_PAGES		2
+#define TK_SCROLL_UNITS		3
+#define TK_SCROLL_ERROR		4
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Extensions to the X event set
+ *
+ *----------------------------------------------------------------------
+ */
+
+#define VirtualEvent	    (MappingNotify + 1)
+#define ActivateNotify	    (MappingNotify + 2)
+#define DeactivateNotify    (MappingNotify + 3)
+#define MouseWheelEvent     (MappingNotify + 4)
+#define TK_LASTEVENT	    (MappingNotify + 5)
+
+#define MouseWheelMask	    (1L << 28)
+#define ActivateMask	    (1L << 29)
+#define VirtualEventMask    (1L << 30)
+
+/*
+ * A virtual event shares most of its fields with the XKeyEvent and
+ * XButtonEvent structures. 99% of the time a virtual event will be an
+ * abstraction of a key or button event, so this structure provides the most
+ * information to the user. The only difference is the changing of the detail
+ * field for a virtual event so that it holds the name of the virtual event
+ * being triggered.
+ *
+ * When using this structure, you should ensure that you zero out all the
+ * fields first using memset() or bzero().
+ */
+
+typedef struct {
+    int type;
+    unsigned long serial;	/* # of last request processed by server. */
+    Bool send_event;		/* True if this came from a SendEvent
+				 * request. */
+    Display *display;		/* Display the event was read from. */
+    Window event;		/* Window on which event was requested. */
+    Window root;		/* Root window that the event occurred on. */
+    Window subwindow;		/* Child window. */
+    Time time;			/* Milliseconds. */
+    int x, y;			/* Pointer x, y coordinates in event
+				 * window. */
+    int x_root, y_root;		/* Coordinates relative to root. */
+    unsigned int state;		/* Key or button mask */
+    Tk_Uid name;		/* Name of virtual event. */
+    Bool same_screen;		/* Same screen flag. */
+    Tcl_Obj *user_data;		/* Application-specific data reference; Tk
+				 * will decrement the reference count *once*
+				 * when it has finished processing the
+				 * event. */
+} XVirtualEvent;
+
+typedef struct {
+    int type;
+    unsigned long serial;	/* # of last request processed by server. */
+    Bool send_event;		/* True if this came from a SendEvent
+				 * request. */
+    Display *display;		/* Display the event was read from. */
+    Window window;		/* Window in which event occurred. */
+} XActivateDeactivateEvent;
+typedef XActivateDeactivateEvent XActivateEvent;
+typedef XActivateDeactivateEvent XDeactivateEvent;
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Macros for querying Tk_Window structures. See the manual entries for
+ * documentation.
+ *
+ *----------------------------------------------------------------------
+ */
+
+#define Tk_Display(tkwin)	(((Tk_FakeWin *) (tkwin))->display)
+#define Tk_ScreenNumber(tkwin)	(((Tk_FakeWin *) (tkwin))->screenNum)
+#define Tk_Screen(tkwin) \
+    (ScreenOfDisplay(Tk_Display(tkwin), Tk_ScreenNumber(tkwin)))
+#define Tk_Depth(tkwin)		(((Tk_FakeWin *) (tkwin))->depth)
+#define Tk_Visual(tkwin)	(((Tk_FakeWin *) (tkwin))->visual)
+#define Tk_WindowId(tkwin)	(((Tk_FakeWin *) (tkwin))->window)
+#define Tk_PathName(tkwin) 	(((Tk_FakeWin *) (tkwin))->pathName)
+#define Tk_Name(tkwin)		(((Tk_FakeWin *) (tkwin))->nameUid)
+#define Tk_Class(tkwin) 	(((Tk_FakeWin *) (tkwin))->classUid)
+#define Tk_X(tkwin)		(((Tk_FakeWin *) (tkwin))->changes.x)
+#define Tk_Y(tkwin)		(((Tk_FakeWin *) (tkwin))->changes.y)
+#define Tk_Width(tkwin)		(((Tk_FakeWin *) (tkwin))->changes.width)
+#define Tk_Height(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->changes.height)
+#define Tk_Changes(tkwin)	(&((Tk_FakeWin *) (tkwin))->changes)
+#define Tk_Attributes(tkwin)	(&((Tk_FakeWin *) (tkwin))->atts)
+#define Tk_IsEmbedded(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->flags & TK_EMBEDDED)
+#define Tk_IsContainer(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->flags & TK_CONTAINER)
+#define Tk_IsMapped(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->flags & TK_MAPPED)
+#define Tk_IsTopLevel(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->flags & TK_TOP_LEVEL)
+#define Tk_HasWrapper(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->flags & TK_HAS_WRAPPER)
+#define Tk_WinManaged(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->flags & TK_WIN_MANAGED)
+#define Tk_TopWinHierarchy(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->flags & TK_TOP_HIERARCHY)
+#define Tk_IsManageable(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->flags & TK_WM_MANAGEABLE)
+#define Tk_ReqWidth(tkwin)	(((Tk_FakeWin *) (tkwin))->reqWidth)
+#define Tk_ReqHeight(tkwin)	(((Tk_FakeWin *) (tkwin))->reqHeight)
+/* Tk_InternalBorderWidth is deprecated */
+#define Tk_InternalBorderWidth(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->internalBorderLeft)
+#define Tk_InternalBorderLeft(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->internalBorderLeft)
+#define Tk_InternalBorderRight(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->internalBorderRight)
+#define Tk_InternalBorderTop(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->internalBorderTop)
+#define Tk_InternalBorderBottom(tkwin) \
+    (((Tk_FakeWin *) (tkwin))->internalBorderBottom)
+#define Tk_MinReqWidth(tkwin)	(((Tk_FakeWin *) (tkwin))->minReqWidth)
+#define Tk_MinReqHeight(tkwin)	(((Tk_FakeWin *) (tkwin))->minReqHeight)
+#define Tk_Parent(tkwin)	(((Tk_FakeWin *) (tkwin))->parentPtr)
+#define Tk_Colormap(tkwin)	(((Tk_FakeWin *) (tkwin))->atts.colormap)
+
+/*
+ * The structure below is needed by the macros above so that they can access
+ * the fields of a Tk_Window. The fields not needed by the macros are declared
+ * as "dummyX". The structure has its own type in order to prevent apps from
+ * accessing Tk_Window fields except using official macros. WARNING!! The
+ * structure definition must be kept consistent with the TkWindow structure in
+ * tkInt.h. If you change one, then change the other. See the declaration in
+ * tkInt.h for documentation on what the fields are used for internally.
+ */
+
+typedef struct Tk_FakeWin {
+    Display *display;
+    char *dummy1;		/* dispPtr */
+    int screenNum;
+    Visual *visual;
+    int depth;
+    Window window;
+    char *dummy2;		/* childList */
+    char *dummy3;		/* lastChildPtr */
+    Tk_Window parentPtr;	/* parentPtr */
+    char *dummy4;		/* nextPtr */
+    char *dummy5;		/* mainPtr */
+    char *pathName;
+    Tk_Uid nameUid;
+    Tk_Uid classUid;
+    XWindowChanges changes;
+    unsigned int dummy6;	/* dirtyChanges */
+    XSetWindowAttributes atts;
+    unsigned long dummy7;	/* dirtyAtts */
+    unsigned int flags;
+    char *dummy8;		/* handlerList */
+#ifdef TK_USE_INPUT_METHODS
+    XIC dummy9;			/* inputContext */
+#endif /* TK_USE_INPUT_METHODS */
+    ClientData *dummy10;	/* tagPtr */
+    int dummy11;		/* numTags */
+    int dummy12;		/* optionLevel */
+    char *dummy13;		/* selHandlerList */
+    char *dummy14;		/* geomMgrPtr */
+    ClientData dummy15;		/* geomData */
+    int reqWidth, reqHeight;
+    int internalBorderLeft;
+    char *dummy16;		/* wmInfoPtr */
+    char *dummy17;		/* classProcPtr */
+    ClientData dummy18;		/* instanceData */
+    char *dummy19;		/* privatePtr */
+    int internalBorderRight;
+    int internalBorderTop;
+    int internalBorderBottom;
+    int minReqWidth;
+    int minReqHeight;
+#ifdef TK_USE_INPUT_METHODS
+    int dummy20;
+#endif /* TK_USE_INPUT_METHODS */
+    char *dummy21;		/* geomMgrName */
+    Tk_Window dummy22;		/* maintainerPtr */
+} Tk_FakeWin;
+
+/*
+ * Flag values for TkWindow (and Tk_FakeWin) structures are:
+ *
+ * TK_MAPPED:			1 means window is currently mapped,
+ *				0 means unmapped.
+ * TK_TOP_LEVEL:		1 means this is a top-level widget.
+ * TK_ALREADY_DEAD:		1 means the window is in the process of
+ *				being destroyed already.
+ * TK_NEED_CONFIG_NOTIFY:	1 means that the window has been reconfigured
+ *				before it was made to exist. At the time of
+ *				making it exist a ConfigureNotify event needs
+ *				to be generated.
+ * TK_GRAB_FLAG:		Used to manage grabs. See tkGrab.c for details
+ * TK_CHECKED_IC:		1 means we've already tried to get an input
+ *				context for this window; if the ic field is
+ *				NULL it means that there isn't a context for
+ *				the field.
+ * TK_DONT_DESTROY_WINDOW:	1 means that Tk_DestroyWindow should not
+ *				invoke XDestroyWindow to destroy this widget's
+ *				X window. The flag is set when the window has
+ *				already been destroyed elsewhere (e.g. by
+ *				another application) or when it will be
+ *				destroyed later (e.g. by destroying its parent)
+ * TK_WM_COLORMAP_WINDOW:	1 means that this window has at some time
+ *				appeared in the WM_COLORMAP_WINDOWS property
+ *				for its toplevel, so we have to remove it from
+ *				that property if the window is deleted and the
+ *				toplevel isn't.
+ * TK_EMBEDDED:			1 means that this window (which must be a
+ *				toplevel) is not a free-standing window but
+ *				rather is embedded in some other application.
+ * TK_CONTAINER:		1 means that this window is a container, and
+ *				that some other application (either in this
+ *				process or elsewhere) may be embedding itself
+ *				inside the window.
+ * TK_BOTH_HALVES:		1 means that this window is used for
+ *				application embedding (either as container or
+ *				embedded application), and both the containing
+ *				and embedded halves are associated with
+ *				windows in this particular process.
+ * TK_WRAPPER:			1 means that this window is the extra wrapper
+ *				window created around a toplevel to hold the
+ *				menubar under Unix. See tkUnixWm.c for more
+ *				information.
+ * TK_REPARENTED:		1 means that this window has been reparented
+ *				so that as far as the window system is
+ *				concerned it isn't a child of its Tk parent.
+ *				Initially this is used only for special Unix
+ *				menubar windows.
+ * TK_ANONYMOUS_WINDOW:		1 means that this window has no name, and is
+ *				thus not accessible from Tk.
+ * TK_HAS_WRAPPER		1 means that this window has a wrapper window
+ * TK_WIN_MANAGED		1 means that this window is a child of the root
+ *				window, and is managed by the window manager.
+ * TK_TOP_HIERARCHY		1 means this window is at the top of a physical
+ *				window hierarchy within this process, i.e. the
+ *				window's parent either doesn't exist or is not
+ *				owned by this Tk application.
+ * TK_PROP_PROPCHANGE		1 means that PropertyNotify events in the
+ *				window's children should propagate up to this
+ *				window.
+ * TK_WM_MANAGEABLE		1 marks a window as capable of being converted
+ *				into a toplevel using [wm manage].
+ * TK_CAN_INPUT_TEXT            1 means that this window accepts text input.
+ *                              Used on macOS to indicate that key events can be
+ *                              processed with the NSTextInputClient protocol.
+ *                              Not currently accessible through the public API.
+ */
+
+#define TK_MAPPED		1
+#define TK_TOP_LEVEL		2
+#define TK_ALREADY_DEAD		4
+#define TK_NEED_CONFIG_NOTIFY	8
+#define TK_GRAB_FLAG		0x10
+#define TK_CHECKED_IC		0x20
+#define TK_DONT_DESTROY_WINDOW	0x40
+#define TK_WM_COLORMAP_WINDOW	0x80
+#define TK_EMBEDDED		0x100
+#define TK_CONTAINER		0x200
+#define TK_BOTH_HALVES		0x400
+
+#define TK_WRAPPER		0x1000
+#define TK_REPARENTED		0x2000
+#define TK_ANONYMOUS_WINDOW	0x4000
+#define TK_HAS_WRAPPER		0x8000
+#define TK_WIN_MANAGED		0x10000
+#define TK_TOP_HIERARCHY	0x20000
+#define TK_PROP_PROPCHANGE	0x40000
+#define TK_WM_MANAGEABLE	0x80000
+#define TK_CAN_INPUT_TEXT       0x100000
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Procedure prototypes and structures used for defining new canvas items:
+ *
+ *----------------------------------------------------------------------
+ */
+
+typedef enum {
+    TK_STATE_NULL = -1, TK_STATE_ACTIVE, TK_STATE_DISABLED,
+    TK_STATE_NORMAL, TK_STATE_HIDDEN
+} Tk_State;
+
+typedef struct Tk_SmoothMethod {
+    CONST86 char *name;
+    int (*coordProc) (Tk_Canvas canvas, double *pointPtr, int numPoints,
+	    int numSteps, XPoint xPoints[], double dblPoints[]);
+    void (*postscriptProc) (Tcl_Interp *interp, Tk_Canvas canvas,
+	    double *coordPtr, int numPoints, int numSteps);
+} Tk_SmoothMethod;
+
+/*
+ * For each item in a canvas widget there exists one record with the following
+ * structure. Each actual item is represented by a record with the following
+ * stuff at its beginning, plus additional type-specific stuff after that.
+ */
+
+#define TK_TAG_SPACE 3
+
+typedef struct Tk_Item {
+    int id;			/* Unique identifier for this item (also
+				 * serves as first tag for item). */
+    struct Tk_Item *nextPtr;	/* Next in display list of all items in this
+				 * canvas. Later items in list are drawn on
+				 * top of earlier ones. */
+    Tk_Uid staticTagSpace[TK_TAG_SPACE];
+				/* Built-in space for limited # of tags. */
+    Tk_Uid *tagPtr;		/* Pointer to array of tags. Usually points to
+				 * staticTagSpace, but may point to malloc-ed
+				 * space if there are lots of tags. */
+    int tagSpace;		/* Total amount of tag space available at
+				 * tagPtr. */
+    int numTags;		/* Number of tag slots actually used at
+				 * *tagPtr. */
+    struct Tk_ItemType *typePtr;/* Table of procedures that implement this
+				 * type of item. */
+    int x1, y1, x2, y2;		/* Bounding box for item, in integer canvas
+				 * units. Set by item-specific code and
+				 * guaranteed to contain every pixel drawn in
+				 * item. Item area includes x1 and y1 but not
+				 * x2 and y2. */
+    struct Tk_Item *prevPtr;	/* Previous in display list of all items in
+				 * this canvas. Later items in list are drawn
+				 * just below earlier ones. */
+    Tk_State state;		/* State of item. */
+    char *reserved1;		/* reserved for future use */
+    int redraw_flags;		/* Some flags used in the canvas */
+
+    /*
+     *------------------------------------------------------------------
+     * Starting here is additional type-specific stuff; see the declarations
+     * for individual types to see what is part of each type. The actual space
+     * below is determined by the "itemInfoSize" of the type's Tk_ItemType
+     * record.
+     *------------------------------------------------------------------
+     */
+} Tk_Item;
+
+/*
+ * Flag bits for canvases (redraw_flags):
+ *
+ * TK_ITEM_STATE_DEPENDANT -	1 means that object needs to be redrawn if the
+ *				canvas state changes.
+ * TK_ITEM_DONT_REDRAW - 	1 means that the object redraw is already been
+ *				prepared, so the general canvas code doesn't
+ *				need to do that any more.
+ */
+
+#define TK_ITEM_STATE_DEPENDANT		1
+#define TK_ITEM_DONT_REDRAW		2
+
+/*
+ * Records of the following type are used to describe a type of item (e.g.
+ * lines, circles, etc.) that can form part of a canvas widget.
+ */
+
+#ifdef USE_OLD_CANVAS
+typedef int	(Tk_ItemCreateProc)(Tcl_Interp *interp, Tk_Canvas canvas,
+		    Tk_Item *itemPtr, int argc, char **argv);
+typedef int	(Tk_ItemConfigureProc)(Tcl_Interp *interp, Tk_Canvas canvas,
+		    Tk_Item *itemPtr, int argc, char **argv, int flags);
+typedef int	(Tk_ItemCoordProc)(Tcl_Interp *interp, Tk_Canvas canvas,
+		    Tk_Item *itemPtr, int argc, char **argv);
+#else
+typedef int	(Tk_ItemCreateProc)(Tcl_Interp *interp, Tk_Canvas canvas,
+		    Tk_Item *itemPtr, int objc, Tcl_Obj *const objv[]);
+typedef int	(Tk_ItemConfigureProc)(Tcl_Interp *interp, Tk_Canvas canvas,
+		    Tk_Item *itemPtr, int objc, Tcl_Obj *const objv[],
+		    int flags);
+typedef int	(Tk_ItemCoordProc)(Tcl_Interp *interp, Tk_Canvas canvas,
+		    Tk_Item *itemPtr, int objc, Tcl_Obj *const objv[]);
+#endif /* USE_OLD_CANVAS */
+typedef void	(Tk_ItemDeleteProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    Display *display);
+typedef void	(Tk_ItemDisplayProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    Display *display, Drawable dst, int x, int y, int width,
+		    int height);
+typedef double	(Tk_ItemPointProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    double *pointPtr);
+typedef int	(Tk_ItemAreaProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    double *rectPtr);
+typedef int	(Tk_ItemPostscriptProc)(Tcl_Interp *interp, Tk_Canvas canvas,
+		    Tk_Item *itemPtr, int prepass);
+typedef void	(Tk_ItemScaleProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    double originX, double originY, double scaleX,
+		    double scaleY);
+typedef void	(Tk_ItemTranslateProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    double deltaX, double deltaY);
+#ifdef USE_OLD_CANVAS
+typedef int	(Tk_ItemIndexProc)(Tcl_Interp *interp, Tk_Canvas canvas,
+		    Tk_Item *itemPtr, char *indexString, int *indexPtr);
+#else
+typedef int	(Tk_ItemIndexProc)(Tcl_Interp *interp, Tk_Canvas canvas,
+		    Tk_Item *itemPtr, Tcl_Obj *indexString, int *indexPtr);
+#endif /* USE_OLD_CANVAS */
+typedef void	(Tk_ItemCursorProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    int index);
+typedef int	(Tk_ItemSelectionProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    int offset, char *buffer, int maxBytes);
+#ifdef USE_OLD_CANVAS
+typedef void	(Tk_ItemInsertProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    int beforeThis, char *string);
+#else
+typedef void	(Tk_ItemInsertProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    int beforeThis, Tcl_Obj *string);
+#endif /* USE_OLD_CANVAS */
+typedef void	(Tk_ItemDCharsProc)(Tk_Canvas canvas, Tk_Item *itemPtr,
+		    int first, int last);
+
+#ifndef __NO_OLD_CONFIG
+
+typedef struct Tk_ItemType {
+    CONST86 char *name;		/* The name of this type of item, such as
+				 * "line". */
+    int itemSize;		/* Total amount of space needed for item's
+				 * record. */
+    Tk_ItemCreateProc *createProc;
+				/* Procedure to create a new item of this
+				 * type. */
+    CONST86 Tk_ConfigSpec *configSpecs; /* Pointer to array of configuration specs for
+				 * this type. Used for returning configuration
+				 * info. */
+    Tk_ItemConfigureProc *configProc;
+				/* Procedure to call to change configuration
+				 * options. */
+    Tk_ItemCoordProc *coordProc;/* Procedure to call to get and set the item's
+				 * coordinates. */
+    Tk_ItemDeleteProc *deleteProc;
+				/* Procedure to delete existing item of this
+				 * type. */
+    Tk_ItemDisplayProc *displayProc;
+				/* Procedure to display items of this type. */
+    int alwaysRedraw;		/* Non-zero means displayProc should be called
+				 * even when the item has been moved
+				 * off-screen. */
+    Tk_ItemPointProc *pointProc;/* Computes distance from item to a given
+				 * point. */
+    Tk_ItemAreaProc *areaProc;	/* Computes whether item is inside, outside,
+				 * or overlapping an area. */
+    Tk_ItemPostscriptProc *postscriptProc;
+				/* Procedure to write a Postscript description
+				 * for items of this type. */
+    Tk_ItemScaleProc *scaleProc;/* Procedure to rescale items of this type. */
+    Tk_ItemTranslateProc *translateProc;
+				/* Procedure to translate items of this
+				 * type. */
+    Tk_ItemIndexProc *indexProc;/* Procedure to determine index of indicated
+				 * character. NULL if item doesn't support
+				 * indexing. */
+    Tk_ItemCursorProc *icursorProc;
+				/* Procedure to set insert cursor posn to just
+				 * before a given position. */
+    Tk_ItemSelectionProc *selectionProc;
+				/* Procedure to return selection (in STRING
+				 * format) when it is in this item. */
+    Tk_ItemInsertProc *insertProc;
+				/* Procedure to insert something into an
+				 * item. */
+    Tk_ItemDCharsProc *dCharsProc;
+				/* Procedure to delete characters from an
+				 * item. */
+    struct Tk_ItemType *nextPtr;/* Used to link types together into a list. */
+    char *reserved1;		/* Reserved for future extension. */
+    int reserved2;		/* Carefully compatible with */
+    char *reserved3;		/* Jan Nijtmans dash patch */
+    char *reserved4;
+} Tk_ItemType;
+
+/*
+ * Flag (used in the alwaysRedraw field) to say whether an item supports
+ * point-level manipulation like the line and polygon items.
+ */
+
+#define TK_MOVABLE_POINTS	2
+
+#endif /* __NO_OLD_CONFIG */
+
+/*
+ * The following structure provides information about the selection and the
+ * insertion cursor. It is needed by only a few items, such as those that
+ * display text. It is shared by the generic canvas code and the item-specific
+ * code, but most of the fields should be written only by the canvas generic
+ * code.
+ */
+
+typedef struct Tk_CanvasTextInfo {
+    Tk_3DBorder selBorder;	/* Border and background for selected
+				 * characters. Read-only to items.*/
+    int selBorderWidth;		/* Width of border around selection. Read-only
+				 * to items. */
+    XColor *selFgColorPtr;	/* Foreground color for selected text.
+				 * Read-only to items. */
+    Tk_Item *selItemPtr;	/* Pointer to selected item. NULL means
+				 * selection isn't in this canvas. Writable by
+				 * items. */
+    int selectFirst;		/* Character index of first selected
+				 * character. Writable by items. */
+    int selectLast;		/* Character index of last selected character.
+				 * Writable by items. */
+    Tk_Item *anchorItemPtr;	/* Item corresponding to "selectAnchor": not
+				 * necessarily selItemPtr. Read-only to
+				 * items. */
+    int selectAnchor;		/* Character index of fixed end of selection
+				 * (i.e. "select to" operation will use this
+				 * as one end of the selection). Writable by
+				 * items. */
+    Tk_3DBorder insertBorder;	/* Used to draw vertical bar for insertion
+				 * cursor. Read-only to items. */
+    int insertWidth;		/* Total width of insertion cursor. Read-only
+				 * to items. */
+    int insertBorderWidth;	/* Width of 3-D border around insert cursor.
+				 * Read-only to items. */
+    Tk_Item *focusItemPtr;	/* Item that currently has the input focus, or
+				 * NULL if no such item. Read-only to items. */
+    int gotFocus;		/* Non-zero means that the canvas widget has
+				 * the input focus. Read-only to items.*/
+    int cursorOn;		/* Non-zero means that an insertion cursor
+				 * should be displayed in focusItemPtr.
+				 * Read-only to items.*/
+} Tk_CanvasTextInfo;
+
+/*
+ * Structures used for Dashing and Outline.
+ */
+
+typedef struct Tk_Dash {
+    int number;
+    union {
+	char *pt;
+	char array[sizeof(char *)];
+    } pattern;
+} Tk_Dash;
+
+typedef struct Tk_TSOffset {
+    int flags;			/* Flags; see below for possible values */
+    int xoffset;		/* x offset */
+    int yoffset;		/* y offset */
+} Tk_TSOffset;
+
+/*
+ * Bit fields in Tk_TSOffset->flags:
+ */
+
+#define TK_OFFSET_INDEX		1
+#define TK_OFFSET_RELATIVE	2
+#define TK_OFFSET_LEFT		4
+#define TK_OFFSET_CENTER	8
+#define TK_OFFSET_RIGHT		16
+#define TK_OFFSET_TOP		32
+#define TK_OFFSET_MIDDLE	64
+#define TK_OFFSET_BOTTOM	128
+
+typedef struct Tk_Outline {
+    GC gc;			/* Graphics context. */
+    double width;		/* Width of outline. */
+    double activeWidth;		/* Width of outline. */
+    double disabledWidth;	/* Width of outline. */
+    int offset;			/* Dash offset. */
+    Tk_Dash dash;		/* Dash pattern. */
+    Tk_Dash activeDash;		/* Dash pattern if state is active. */
+    Tk_Dash disabledDash;	/* Dash pattern if state is disabled. */
+    void *reserved1;		/* Reserved for future expansion. */
+    void *reserved2;
+    void *reserved3;
+    Tk_TSOffset tsoffset;	/* Stipple offset for outline. */
+    XColor *color;		/* Outline color. */
+    XColor *activeColor;	/* Outline color if state is active. */
+    XColor *disabledColor;	/* Outline color if state is disabled. */
+    Pixmap stipple;		/* Outline Stipple pattern. */
+    Pixmap activeStipple;	/* Outline Stipple pattern if state is
+				 * active. */
+    Pixmap disabledStipple;	/* Outline Stipple pattern if state is
+				 * disabled. */
+} Tk_Outline;
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Procedure prototypes and structures used for managing images:
+ *
+ *----------------------------------------------------------------------
+ */
+
+typedef struct Tk_ImageType Tk_ImageType;
+#ifdef USE_OLD_IMAGE
+typedef int (Tk_ImageCreateProc) (Tcl_Interp *interp, char *name, int argc,
+	char **argv, Tk_ImageType *typePtr, Tk_ImageMaster model,
+	ClientData *clientDataPtr);
+#else
+typedef int (Tk_ImageCreateProc) (Tcl_Interp *interp, CONST86 char *name, int objc,
+	Tcl_Obj *const objv[], CONST86 Tk_ImageType *typePtr, Tk_ImageMaster model,
+	ClientData *clientDataPtr);
+#endif /* USE_OLD_IMAGE */
+typedef ClientData (Tk_ImageGetProc) (Tk_Window tkwin, ClientData clientData);
+typedef void (Tk_ImageDisplayProc) (ClientData clientData, Display *display,
+	Drawable drawable, int imageX, int imageY, int width, int height,
+	int drawableX, int drawableY);
+typedef void (Tk_ImageFreeProc) (ClientData clientData, Display *display);
+typedef void (Tk_ImageDeleteProc) (ClientData clientData);
+typedef void (Tk_ImageChangedProc) (ClientData clientData, int x, int y,
+	int width, int height, int imageWidth, int imageHeight);
+typedef int (Tk_ImagePostscriptProc) (ClientData clientData,
+	Tcl_Interp *interp, Tk_Window tkwin, Tk_PostscriptInfo psinfo,
+	int x, int y, int width, int height, int prepass);
+
+/*
+ * The following structure represents a particular type of image (bitmap, xpm
+ * image, etc.). It provides information common to all images of that type,
+ * such as the type name and a collection of procedures in the image manager
+ * that respond to various events. Each image manager is represented by one of
+ * these structures.
+ */
+
+struct Tk_ImageType {
+    CONST86 char *name;		/* Name of image type. */
+    Tk_ImageCreateProc *createProc;
+				/* Procedure to call to create a new image of
+				 * this type. */
+    Tk_ImageGetProc *getProc;	/* Procedure to call the first time
+				 * Tk_GetImage is called in a new way (new
+				 * visual or screen). */
+    Tk_ImageDisplayProc *displayProc;
+				/* Call to draw image, in response to
+				 * Tk_RedrawImage calls. */
+    Tk_ImageFreeProc *freeProc;	/* Procedure to call whenever Tk_FreeImage is
+				 * called to release an instance of an
+				 * image. */
+    Tk_ImageDeleteProc *deleteProc;
+				/* Procedure to call to delete image. It will
+				 * not be called until after freeProc has been
+				 * called for each instance of the image. */
+    Tk_ImagePostscriptProc *postscriptProc;
+				/* Procedure to call to produce postscript
+				 * output for the image. */
+    struct Tk_ImageType *nextPtr;
+				/* Next in list of all image types currently
+				 * known. Filled in by Tk, not by image
+				 * manager. */
+    char *reserved;		/* reserved for future expansion */
+};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Additional definitions used to manage images of type "photo".
+ *
+ *----------------------------------------------------------------------
+ */
+
+/*
+ * The following type is used to identify a particular photo image to be
+ * manipulated:
+ */
+
+typedef void *Tk_PhotoHandle;
+
+/*
+ * The following structure describes a block of pixels in memory:
+ */
+
+typedef struct Tk_PhotoImageBlock {
+    unsigned char *pixelPtr;	/* Pointer to the first pixel. */
+    int width;			/* Width of block, in pixels. */
+    int height;			/* Height of block, in pixels. */
+    int pitch;			/* Address difference between corresponding
+				 * pixels in successive lines. */
+    int pixelSize;		/* Address difference between successive
+				 * pixels in the same line. */
+    int offset[4];		/* Address differences between the red, green,
+				 * blue and alpha components of the pixel and
+				 * the pixel as a whole. */
+} Tk_PhotoImageBlock;
+
+/*
+ * The following values control how blocks are combined into photo images when
+ * the alpha component of a pixel is not 255, a.k.a. the compositing rule.
+ */
+
+#define TK_PHOTO_COMPOSITE_OVERLAY	0
+#define TK_PHOTO_COMPOSITE_SET		1
+
+/*
+ * Procedure prototypes and structures used in reading and writing photo
+ * images:
+ */
+
+typedef struct Tk_PhotoImageFormat Tk_PhotoImageFormat;
+#ifdef USE_OLD_IMAGE
+typedef int (Tk_ImageFileMatchProc) (Tcl_Channel chan, char *fileName,
+	char *formatString, int *widthPtr, int *heightPtr);
+typedef int (Tk_ImageStringMatchProc) (char *string, char *formatString,
+	int *widthPtr, int *heightPtr);
+typedef int (Tk_ImageFileReadProc) (Tcl_Interp *interp, Tcl_Channel chan,
+	char *fileName, char *formatString, Tk_PhotoHandle imageHandle,
+	int destX, int destY, int width, int height, int srcX, int srcY);
+typedef int (Tk_ImageStringReadProc) (Tcl_Interp *interp, char *string,
+	char *formatString, Tk_PhotoHandle imageHandle, int destX, int destY,
+	int width, int height, int srcX, int srcY);
+typedef int (Tk_ImageFileWriteProc) (Tcl_Interp *interp, char *fileName,
+	char *formatString, Tk_PhotoImageBlock *blockPtr);
+typedef int (Tk_ImageStringWriteProc) (Tcl_Interp *interp,
+	Tcl_DString *dataPtr, char *formatString, Tk_PhotoImageBlock *blockPtr);
+#else
+typedef int (Tk_ImageFileMatchProc) (Tcl_Channel chan, const char *fileName,
+	Tcl_Obj *format, int *widthPtr, int *heightPtr, Tcl_Interp *interp);
+typedef int (Tk_ImageStringMatchProc) (Tcl_Obj *dataObj, Tcl_Obj *format,
+	int *widthPtr, int *heightPtr, Tcl_Interp *interp);
+typedef int (Tk_ImageFileReadProc) (Tcl_Interp *interp, Tcl_Channel chan,
+	const char *fileName, Tcl_Obj *format, Tk_PhotoHandle imageHandle,
+	int destX, int destY, int width, int height, int srcX, int srcY);
+typedef int (Tk_ImageStringReadProc) (Tcl_Interp *interp, Tcl_Obj *dataObj,
+	Tcl_Obj *format, Tk_PhotoHandle imageHandle, int destX, int destY,
+	int width, int height, int srcX, int srcY);
+typedef int (Tk_ImageFileWriteProc) (Tcl_Interp *interp, const char *fileName,
+	Tcl_Obj *format, Tk_PhotoImageBlock *blockPtr);
+typedef int (Tk_ImageStringWriteProc) (Tcl_Interp *interp, Tcl_Obj *format,
+	Tk_PhotoImageBlock *blockPtr);
+#endif /* USE_OLD_IMAGE */
+
+/*
+ * The following structure represents a particular file format for storing
+ * images (e.g., PPM, GIF, JPEG, etc.). It provides information to allow image
+ * files of that format to be recognized and read into a photo image.
+ */
+
+struct Tk_PhotoImageFormat {
+    CONST86 char *name;		/* Name of image file format */
+    Tk_ImageFileMatchProc *fileMatchProc;
+				/* Procedure to call to determine whether an
+				 * image file matches this format. */
+    Tk_ImageStringMatchProc *stringMatchProc;
+				/* Procedure to call to determine whether the
+				 * data in a string matches this format. */
+    Tk_ImageFileReadProc *fileReadProc;
+				/* Procedure to call to read data from an
+				 * image file into a photo image. */
+    Tk_ImageStringReadProc *stringReadProc;
+				/* Procedure to call to read data from a
+				 * string into a photo image. */
+    Tk_ImageFileWriteProc *fileWriteProc;
+				/* Procedure to call to write data from a
+				 * photo image to a file. */
+    Tk_ImageStringWriteProc *stringWriteProc;
+				/* Procedure to call to obtain a string
+				 * representation of the data in a photo
+				 * image.*/
+    struct Tk_PhotoImageFormat *nextPtr;
+				/* Next in list of all photo image formats
+				 * currently known. Filled in by Tk, not by
+				 * image format handler. */
+};
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Procedure prototypes and structures used for managing styles:
+ *
+ *----------------------------------------------------------------------
+ */
+
+/*
+ * Style support version tag.
+ */
+
+#define TK_STYLE_VERSION_1      0x1
+#define TK_STYLE_VERSION        TK_STYLE_VERSION_1
+
+/*
+ * The following structures and prototypes are used as static templates to
+ * declare widget elements.
+ */
+
+typedef void (Tk_GetElementSizeProc) (ClientData clientData, char *recordPtr,
+	const Tk_OptionSpec **optionsPtr, Tk_Window tkwin, int width,
+	int height, int inner, int *widthPtr, int *heightPtr);
+typedef void (Tk_GetElementBoxProc) (ClientData clientData, char *recordPtr,
+	const Tk_OptionSpec **optionsPtr, Tk_Window tkwin, int x, int y,
+	int width, int height, int inner, int *xPtr, int *yPtr, int *widthPtr,
+	int *heightPtr);
+typedef int (Tk_GetElementBorderWidthProc) (ClientData clientData,
+	char *recordPtr, const Tk_OptionSpec **optionsPtr, Tk_Window tkwin);
+typedef void (Tk_DrawElementProc) (ClientData clientData, char *recordPtr,
+	const Tk_OptionSpec **optionsPtr, Tk_Window tkwin, Drawable d, int x,
+	int y, int width, int height, int state);
+
+typedef struct Tk_ElementOptionSpec {
+    char *name;			/* Name of the required option. */
+    Tk_OptionType type;		/* Accepted option type. TK_OPTION_END means
+				 * any. */
+} Tk_ElementOptionSpec;
+
+typedef struct Tk_ElementSpec {
+    int version;		/* Version of the style support. */
+    char *name;			/* Name of element. */
+    Tk_ElementOptionSpec *options;
+				/* List of required options. Last one's name
+				 * must be NULL. */
+    Tk_GetElementSizeProc *getSize;
+				/* Compute the external (resp. internal) size
+				 * of the element from its desired internal
+				 * (resp. external) size. */
+    Tk_GetElementBoxProc *getBox;
+				/* Compute the inscribed or bounding boxes
+				 * within a given area. */
+    Tk_GetElementBorderWidthProc *getBorderWidth;
+				/* Return the element's internal border width.
+				 * Mostly useful for widgets. */
+    Tk_DrawElementProc *draw;	/* Draw the element in the given bounding
+				 * box. */
+} Tk_ElementSpec;
+
+/*
+ * Element state flags. Can be OR'ed.
+ */
+
+#define TK_ELEMENT_STATE_ACTIVE         1<<0
+#define TK_ELEMENT_STATE_DISABLED       1<<1
+#define TK_ELEMENT_STATE_FOCUS          1<<2
+#define TK_ELEMENT_STATE_PRESSED        1<<3
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * The definitions below provide backward compatibility for functions and
+ * types related to event handling that used to be in Tk but have moved to
+ * Tcl.
+ *
+ *----------------------------------------------------------------------
+ */
+
+#define TK_READABLE		TCL_READABLE
+#define TK_WRITABLE		TCL_WRITABLE
+#define TK_EXCEPTION		TCL_EXCEPTION
+
+#define TK_DONT_WAIT		TCL_DONT_WAIT
+#define TK_X_EVENTS		TCL_WINDOW_EVENTS
+#define TK_WINDOW_EVENTS	TCL_WINDOW_EVENTS
+#define TK_FILE_EVENTS		TCL_FILE_EVENTS
+#define TK_TIMER_EVENTS		TCL_TIMER_EVENTS
+#define TK_IDLE_EVENTS		TCL_IDLE_EVENTS
+#define TK_ALL_EVENTS		TCL_ALL_EVENTS
+
+#define Tk_IdleProc		Tcl_IdleProc
+#define Tk_FileProc		Tcl_FileProc
+#define Tk_TimerProc		Tcl_TimerProc
+#define Tk_TimerToken		Tcl_TimerToken
+
+#define Tk_BackgroundError	Tcl_BackgroundError
+#define Tk_CancelIdleCall	Tcl_CancelIdleCall
+#define Tk_CreateFileHandler	Tcl_CreateFileHandler
+#define Tk_CreateTimerHandler	Tcl_CreateTimerHandler
+#define Tk_DeleteFileHandler	Tcl_DeleteFileHandler
+#define Tk_DeleteTimerHandler	Tcl_DeleteTimerHandler
+#define Tk_DoOneEvent		Tcl_DoOneEvent
+#define Tk_DoWhenIdle		Tcl_DoWhenIdle
+#define Tk_Sleep		Tcl_Sleep
+
+/* Additional stuff that has moved to Tcl: */
+
+#define Tk_EventuallyFree	Tcl_EventuallyFree
+#define Tk_FreeProc		Tcl_FreeProc
+#define Tk_Preserve		Tcl_Preserve
+#define Tk_Release		Tcl_Release
+
+/* Removed Tk_Main, use macro instead */
+#if defined(_WIN32) || defined(__CYGWIN__)
+#define Tk_Main(argc, argv, proc) Tk_MainEx(argc, argv, proc, \
+	(Tcl_FindExecutable(0), (Tcl_CreateInterp)()))
+#else
+#define Tk_Main(argc, argv, proc) Tk_MainEx(argc, argv, proc, \
+	(Tcl_FindExecutable(argv[0]), (Tcl_CreateInterp)()))
+#endif
+const char *		Tk_InitStubs(Tcl_Interp *interp, const char *version,
+				int exact);
+EXTERN const char *	Tk_PkgInitStubsCheck(Tcl_Interp *interp,
+				const char *version, int exact);
+
+#ifndef USE_TK_STUBS
+#define Tk_InitStubs(interp, version, exact) \
+    Tk_PkgInitStubsCheck(interp, version, exact)
+#endif /* USE_TK_STUBS */
+
+#define Tk_InitImageArgs(interp, argc, argv) /**/
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Additional procedure types defined by Tk.
+ *
+ *----------------------------------------------------------------------
+ */
+
+typedef int (Tk_ErrorProc) (ClientData clientData, XErrorEvent *errEventPtr);
+typedef void (Tk_EventProc) (ClientData clientData, XEvent *eventPtr);
+typedef int (Tk_GenericProc) (ClientData clientData, XEvent *eventPtr);
+typedef int (Tk_ClientMessageProc) (Tk_Window tkwin, XEvent *eventPtr);
+typedef int (Tk_GetSelProc) (ClientData clientData, Tcl_Interp *interp,
+	CONST86 char *portion);
+typedef void (Tk_LostSelProc) (ClientData clientData);
+typedef Tk_RestrictAction (Tk_RestrictProc) (ClientData clientData,
+	XEvent *eventPtr);
+typedef int (Tk_SelectionProc) (ClientData clientData, int offset,
+	char *buffer, int maxBytes);
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Platform independent exported procedures and variables.
+ *
+ *----------------------------------------------------------------------
+ */
+
+#include "tkDecls.h"
+
+#ifdef USE_OLD_IMAGE
+#undef Tk_CreateImageType
+#define Tk_CreateImageType		Tk_CreateOldImageType
+#undef Tk_CreatePhotoImageFormat
+#define Tk_CreatePhotoImageFormat	Tk_CreateOldPhotoImageFormat
+#endif /* USE_OLD_IMAGE */
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Allow users to say that they don't want to alter their source to add extra
+ * arguments to Tk_PhotoPutBlock() et al; DO NOT DEFINE THIS WHEN BUILDING TK.
+ *
+ * This goes after the inclusion of the stubbed-decls so that the declarations
+ * of what is actually there can be correct.
+ */
+
+#ifdef USE_COMPOSITELESS_PHOTO_PUT_BLOCK
+#   ifdef Tk_PhotoPutBlock
+#	undef Tk_PhotoPutBlock
+#   endif
+#   define Tk_PhotoPutBlock		Tk_PhotoPutBlock_NoComposite
+#   ifdef Tk_PhotoPutZoomedBlock
+#	undef Tk_PhotoPutZoomedBlock
+#   endif
+#   define Tk_PhotoPutZoomedBlock	Tk_PhotoPutZoomedBlock_NoComposite
+#   define USE_PANIC_ON_PHOTO_ALLOC_FAILURE
+#else /* !USE_COMPOSITELESS_PHOTO_PUT_BLOCK */
+#   ifdef USE_PANIC_ON_PHOTO_ALLOC_FAILURE
+#	ifdef Tk_PhotoPutBlock
+#	    undef Tk_PhotoPutBlock
+#	endif
+#	define Tk_PhotoPutBlock		Tk_PhotoPutBlock_Panic
+#	ifdef Tk_PhotoPutZoomedBlock
+#	    undef Tk_PhotoPutZoomedBlock
+#	endif
+#	define Tk_PhotoPutZoomedBlock	Tk_PhotoPutZoomedBlock_Panic
+#   endif /* USE_PANIC_ON_PHOTO_ALLOC_FAILURE */
+#endif /* USE_COMPOSITELESS_PHOTO_PUT_BLOCK */
+#ifdef USE_PANIC_ON_PHOTO_ALLOC_FAILURE
+#   ifdef Tk_PhotoExpand
+#	undef Tk_PhotoExpand
+#   endif
+#   define Tk_PhotoExpand		Tk_PhotoExpand_Panic
+#   ifdef Tk_PhotoSetSize
+#	undef Tk_PhotoSetSize
+#   endif
+#   define Tk_PhotoSetSize		Tk_PhotoSetSize_Panic
+#endif /* USE_PANIC_ON_PHOTO_ALLOC_FAILURE */
+
+#undef TCL_STORAGE_CLASS
+#define TCL_STORAGE_CLASS DLLIMPORT
+
+#endif /* RC_INVOKED */
+
+/*
+ * end block for C++
+ */
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* _TK */
+
+/*
+ * Local Variables:
+ * mode: c
+ * c-basic-offset: 4
+ * fill-column: 78
+ * End:
+ */