/*
 * 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.
 *
 * RCS: @(#) Id
 */

#ifndef _TK
#define _TK

/*
 * 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  (only if Major.minor changes, not patchlevel)
 * unix/configure.in  (2 LOC Major, 2 LOC minor, 1 LOC patch)
 * win/configure.in  (as above)
 * win/makefile.vc  (not patchlevel)
 * README    (sections 0 and 1)
 * mac/README    (not patchlevel)
 * win/README    (not patchlevel)
 * unix/README    (not patchlevel)
 * unix/tk.spec    (3 LOC Major/Minor, 2 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   4
#define TK_RELEASE_LEVEL   TCL_FINAL_RELEASE
#define TK_RELEASE_SERIAL  13

#define TK_VERSION  "8.4"
#define TK_PATCH_LEVEL  "8.4.13"

#ifndef _TCL
#   include <tcl.h>
#   if (TCL_MAJOR_VERSION != 8) || (TCL_MINOR_VERSION != 4)
#  error Tk 8.4 must be compiled with tcl.h from Tcl 8.4
#   endif
#endif

/* 
 * 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
    
#ifndef _XLIB_H
#   if defined (MAC_TCL)
#  include <Xlib.h>
#  include <X.h>
#   elif defined(MAC_OSX_TK)
#  include <X11/Xlib.h>
#  include <X11/X.h>
#   else
#  include <X11/Xlib.h>
#   endif
#endif
#ifdef __STDC__
#   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:
 */

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. */
    char *optionName;    /* Name used to specify option in Tcl  
         * commands. */
    char *dbName;    /* Name for option in option database. */
    char *dbClass;    /* Class for option in database. */
    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. */
    ClientData 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) _ANSI_ARGS_((ClientData clientData,
  Tcl_Interp *interp, Tk_Window tkwin, Tcl_Obj **value, char *widgRec,
  int offset, char *saveInternalPtr, int flags));
typedef Tcl_Obj *(Tk_CustomOptionGetProc) _ANSI_ARGS_((ClientData clientData,
  Tk_Window tkwin, char *widgRec, int offset));
typedef void (Tk_CustomOptionRestoreProc) _ANSI_ARGS_((ClientData clientData,
  Tk_Window tkwin, char *internalPtr, char *saveInternalPtr));
typedef void (Tk_CustomOptionFreeProc) _ANSI_ARGS_((ClientData clientData,
  Tk_Window tkwin, char *internalPtr));
    
typedef struct Tk_ObjCustomOption {
    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.
 * struct.  Computes number of bytes from beginning of structure
 * to a given field.
 */

#ifdef offsetof
#define Tk_Offset(type, field) ((int) offsetof(type, field))
#else
#define Tk_Offset(type, field) ((int) ((char *) &((type *) 0)->field))
#endif

/*
 * The following two structures are used for error handling.  When
 * configuration 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 wasn't 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 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 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) _ANSI_ARGS_((ClientData clientData,
  Tcl_Interp *interp, Tk_Window tkwin, CONST84 char *value, char *widgRec,
  int offset));
typedef char *(Tk_OptionPrintProc) _ANSI_ARGS_((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. */
    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. */
    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 {
    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. */
    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) _ANSI_ARGS_((Tk_Window tkwin,
  Window parent, ClientData instanceData));
typedef void (Tk_ClassWorldChangedProc) _ANSI_ARGS_((ClientData instanceData));
typedef void (Tk_ClassModalProc) _ANSI_ARGS_((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.
 */

typedef void (Tk_GeomRequestProc) _ANSI_ARGS_((ClientData clientData,
  Tk_Window tkwin));
typedef void (Tk_GeomLostSlaveProc) _ANSI_ARGS_((ClientData clientData,
  Tk_Window tkwin));

typedef struct Tk_GeomMgr {
    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 slave's
         * requested geometry changes. */
    Tk_GeomLostSlaveProc *lostSlaveProc;
        /* Procedure to invoke when a slave is
         * taken away from one geometry manager
         * by another.  NULL means geometry manager
         * doesn't care when slaves are 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      (LASTEvent)
#define ActivateNotify      (LASTEvent + 1)
#define DeactivateNotify    (LASTEvent + 2)
#define MouseWheelEvent     (LASTEvent + 3)
#define TK_LASTEVENT      (LASTEvent + 4)

#define MouseWheelMask      (1L << 28)

#define ActivateMask      (1L << 29)
#define VirtualEventMask    (1L << 30)
#define TK_LASTEVENT      (LASTEvent + 4)


/*
 * 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.
 */

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 occured 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 */
} 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_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 applications 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;
} 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_DEFER_MODAL:    1 means that this window has deferred a modal
 *        loop until all of the bindings for the current
 *        event have been invoked.
 * 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
 *        this window's children should propagate
 *        up to this window.
 */


#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_DEFER_MODAL    0x800
#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

/*
 *--------------------------------------------------------------
 *
 * 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 {
    char *name;
    int (*coordProc) _ANSI_ARGS_((Tk_Canvas canvas,
    double *pointPtr, int numPoints, int numSteps,
    XPoint xPoints[], double dblPoints[]));
    void (*postscriptProc) _ANSI_ARGS_((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 _ANSI_ARGS_((Tcl_Interp *interp,
        Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
        char **argv));
typedef int  Tk_ItemConfigureProc _ANSI_ARGS_((Tcl_Interp *interp,
        Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
        char **argv, int flags));
typedef int  Tk_ItemCoordProc _ANSI_ARGS_((Tcl_Interp *interp,
        Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
        char **argv));
#else
typedef int  Tk_ItemCreateProc _ANSI_ARGS_((Tcl_Interp *interp,
        Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
        Tcl_Obj *CONST objv[]));
typedef int  Tk_ItemConfigureProc _ANSI_ARGS_((Tcl_Interp *interp,
        Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
        Tcl_Obj *CONST objv[], int flags));
typedef int  Tk_ItemCoordProc _ANSI_ARGS_((Tcl_Interp *interp,
        Tk_Canvas canvas, Tk_Item *itemPtr, int argc,
        Tcl_Obj *CONST argv[]));
#endif
typedef void  Tk_ItemDeleteProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, Display *display));
typedef void  Tk_ItemDisplayProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, Display *display, Drawable dst,
        int x, int y, int width, int height));
typedef double  Tk_ItemPointProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, double *pointPtr));
typedef int  Tk_ItemAreaProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, double *rectPtr));
typedef int  Tk_ItemPostscriptProc _ANSI_ARGS_((Tcl_Interp *interp,
        Tk_Canvas canvas, Tk_Item *itemPtr, int prepass));
typedef void  Tk_ItemScaleProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, double originX, double originY,
        double scaleX, double scaleY));
typedef void  Tk_ItemTranslateProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, double deltaX, double deltaY));
typedef int  Tk_ItemIndexProc _ANSI_ARGS_((Tcl_Interp *interp,
        Tk_Canvas canvas, Tk_Item *itemPtr, char *indexString,
        int *indexPtr));
typedef void  Tk_ItemCursorProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, int index));
typedef int  Tk_ItemSelectionProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, int offset, char *buffer,
        int maxBytes));
typedef void  Tk_ItemInsertProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, int beforeThis, char *string));
typedef void  Tk_ItemDCharsProc _ANSI_ARGS_((Tk_Canvas canvas,
        Tk_Item *itemPtr, int first, int last));

#ifndef __NO_OLD_CONFIG

typedef struct Tk_ItemType {
    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. */
    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 pos.
           * 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;

#endif

/*
 * 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_Offset->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) _ANSI_ARGS_((Tcl_Interp *interp,
  char *name, int argc, char **argv, Tk_ImageType *typePtr,
  Tk_ImageMaster master, ClientData *masterDataPtr));
#else
typedef int (Tk_ImageCreateProc) _ANSI_ARGS_((Tcl_Interp *interp,
  char *name, int objc, Tcl_Obj *CONST objv[], Tk_ImageType *typePtr,
  Tk_ImageMaster master, ClientData *masterDataPtr));
#endif
typedef ClientData (Tk_ImageGetProc) _ANSI_ARGS_((Tk_Window tkwin,
  ClientData masterData));
typedef void (Tk_ImageDisplayProc) _ANSI_ARGS_((ClientData instanceData,
  Display *display, Drawable drawable, int imageX, int imageY,
  int width, int height, int drawableX, int drawableY));
typedef void (Tk_ImageFreeProc) _ANSI_ARGS_((ClientData instanceData,
  Display *display));
typedef void (Tk_ImageDeleteProc) _ANSI_ARGS_((ClientData masterData));
typedef void (Tk_ImageChangedProc) _ANSI_ARGS_((ClientData clientData,
  int x, int y, int width, int height, int imageWidth,
  int imageHeight));
typedef int (Tk_ImagePostscriptProc) _ANSI_ARGS_((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 {
    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) _ANSI_ARGS_((Tcl_Channel chan,
  char *fileName, char *formatString, int *widthPtr, int *heightPtr));
typedef int (Tk_ImageStringMatchProc) _ANSI_ARGS_((char *string,
  char *formatString, int *widthPtr, int *heightPtr));
typedef int (Tk_ImageFileReadProc) _ANSI_ARGS_((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) _ANSI_ARGS_((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) _ANSI_ARGS_((Tcl_Interp *interp,
  char *fileName, char *formatString, Tk_PhotoImageBlock *blockPtr));
typedef int (Tk_ImageStringWriteProc) _ANSI_ARGS_((Tcl_Interp *interp,
  Tcl_DString *dataPtr, char *formatString,
  Tk_PhotoImageBlock *blockPtr));
#else
typedef int (Tk_ImageFileMatchProc) _ANSI_ARGS_((Tcl_Channel chan,
  CONST char *fileName, Tcl_Obj *format, int *widthPtr,
  int *heightPtr, Tcl_Interp *interp));
typedef int (Tk_ImageStringMatchProc) _ANSI_ARGS_((Tcl_Obj *dataObj,
  Tcl_Obj *format, int *widthPtr, int *heightPtr,
  Tcl_Interp *interp));
typedef int (Tk_ImageFileReadProc) _ANSI_ARGS_((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) _ANSI_ARGS_((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) _ANSI_ARGS_((Tcl_Interp *interp,
  CONST char *fileName, Tcl_Obj *format, Tk_PhotoImageBlock *blockPtr));
typedef int (Tk_ImageStringWriteProc) _ANSI_ARGS_((Tcl_Interp *interp,
  Tcl_Obj *format, Tk_PhotoImageBlock *blockPtr));
#endif

/*
 * 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 {
    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. */
};

EXTERN void    Tk_CreateOldImageType _ANSI_ARGS_((
        Tk_ImageType *typePtr));
EXTERN void    Tk_CreateOldPhotoImageFormat _ANSI_ARGS_((
        Tk_PhotoImageFormat *formatPtr));

#if !defined(USE_TK_STUBS) && defined(USE_OLD_IMAGE)
#define Tk_CreateImageType Tk_CreateOldImageType
#define Tk_CreatePhotoImageFormat Tk_CreateOldPhotoImageFormat
#endif


/*
 *--------------------------------------------------------------
 *
 * 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) _ANSI_ARGS_((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) _ANSI_ARGS_((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) _ANSI_ARGS_((ClientData clientData,
        char *recordPtr, CONST Tk_OptionSpec **optionsPtr, Tk_Window tkwin));
typedef void (Tk_DrawElementProc) _ANSI_ARGS_((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. */

    /*
     * Hooks
     */

    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 */
#define Tk_Main(argc, argv, proc) \
    Tk_MainEx(argc, argv, proc, Tcl_CreateInterp())

CONST char *Tk_InitStubs _ANSI_ARGS_((Tcl_Interp *interp, char *version, int exact));

#ifndef USE_TK_STUBS

#define Tk_InitStubs(interp, version, exact) \
    Tcl_PkgRequire(interp, "Tk", version, exact)

#endif

void Tk_InitImageArgs _ANSI_ARGS_((Tcl_Interp *interp, int argc, char ***argv));

#if !defined(USE_TK_STUBS) || !defined(USE_OLD_IMAGE)

#define Tk_InitImageArgs(interp, argc, argv) /**/

#endif


/*
 *--------------------------------------------------------------
 *
 * Additional procedure types defined by Tk.
 *
 *--------------------------------------------------------------
 */

typedef int (Tk_ErrorProc) _ANSI_ARGS_((ClientData clientData,
  XErrorEvent *errEventPtr));
typedef void (Tk_EventProc) _ANSI_ARGS_((ClientData clientData,
  XEvent *eventPtr));
typedef int (Tk_GenericProc) _ANSI_ARGS_((ClientData clientData,
  XEvent *eventPtr));
typedef int (Tk_ClientMessageProc) _ANSI_ARGS_((Tk_Window tkwin,
  XEvent *eventPtr));
typedef int (Tk_GetSelProc) _ANSI_ARGS_((ClientData clientData,
  Tcl_Interp *interp, char *portion));
typedef void (Tk_LostSelProc) _ANSI_ARGS_((ClientData clientData));
typedef Tk_RestrictAction (Tk_RestrictProc) _ANSI_ARGS_((
  ClientData clientData, XEvent *eventPtr));
typedef int (Tk_SelectionProc) _ANSI_ARGS_((ClientData clientData,
  int offset, char *buffer, int maxBytes));


/*
 *--------------------------------------------------------------
 *
 * Platform independant exported procedures and variables.
 *
 *--------------------------------------------------------------
 */

#include "tkDecls.h"

/*
 * Allow users to say that they don't want to alter their source to
 * add the extra argument to Tk_PhotoPutBlock(); 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
#endif /* USE_COMPOSITELESS_PHOTO_PUT_BLOCK */

/*
 * Tcl commands exported by Tk:
 */


#undef TCL_STORAGE_CLASS
#define TCL_STORAGE_CLASS DLLIMPORT

#endif /* RC_INVOKED */

/*
 * end block for C++
 */
    
#ifdef __cplusplus
}
#endif
    
#endif /* _TK */
