--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CSP2/CSP2_env/env-d9b9114564458d9d-741b3de822f2aaca6c6caa4325c4afce/include/tkCanvas.h	Tue Mar 18 17:55:14 2025 -0400
@@ -0,0 +1,312 @@
+/*
+ * tkCanvas.h --
+ *
+ *	Declarations shared among all the files that implement canvas widgets.
+ *
+ * Copyright (c) 1991-1994 The Regents of the University of California.
+ * Copyright (c) 1994-1995 Sun Microsystems, Inc.
+ * Copyright (c) 1998 by Scriptics Corporation.
+ *
+ * See the file "license.terms" for information on usage and redistribution of
+ * this file, and for a DISCLAIMER OF ALL WARRANTIES.
+ */
+
+#ifndef _TKCANVAS
+#define _TKCANVAS
+
+#ifndef _TK
+#include "tk.h"
+#endif
+
+#ifndef USE_OLD_TAG_SEARCH
+typedef struct TagSearchExpr_s TagSearchExpr;
+
+struct TagSearchExpr_s {
+    TagSearchExpr *next;	/* For linked lists of expressions - used in
+				 * bindings. */
+    Tk_Uid uid;			/* The uid of the whole expression. */
+    Tk_Uid *uids;		/* Expresion compiled to an array of uids. */
+    int allocated;		/* Available space for array of uids. */
+    int length;			/* Length of expression. */
+    int index;			/* Current position in expression
+				 * evaluation. */
+    int match;			/* This expression matches event's item's
+				 * tags. */
+};
+#endif /* not USE_OLD_TAG_SEARCH */
+
+/*
+ * The record below describes a canvas widget. It is made available to the
+ * item functions so they can access certain shared fields such as the overall
+ * displacement and scale factor for the canvas.
+ */
+
+typedef struct TkCanvas {
+    Tk_Window tkwin;		/* Window that embodies the canvas. NULL means
+				 * that the window has been destroyed but the
+				 * data structures haven't yet been cleaned
+				 * up.*/
+    Display *display;		/* Display containing widget; needed, among
+				 * other things, to release resources after
+				 * tkwin has already gone away. */
+    Tcl_Interp *interp;		/* Interpreter associated with canvas. */
+    Tcl_Command widgetCmd;	/* Token for canvas's widget command. */
+    Tk_Item *firstItemPtr;	/* First in list of all items in canvas, or
+				 * NULL if canvas empty. */
+    Tk_Item *lastItemPtr;	/* Last in list of all items in canvas, or
+				 * NULL if canvas empty. */
+
+    /*
+     * Information used when displaying widget:
+     */
+
+    int borderWidth;		/* Width of 3-D border around window. */
+    Tk_3DBorder bgBorder;	/* Used for canvas background. */
+    int relief;			/* Indicates whether window as a whole is
+				 * raised, sunken, or flat. */
+    int highlightWidth;		/* Width in pixels of highlight to draw around
+				 * widget when it has the focus. <= 0 means
+				 * don't draw a highlight. */
+    XColor *highlightBgColorPtr;
+				/* Color for drawing traversal highlight area
+				 * when highlight is off. */
+    XColor *highlightColorPtr;	/* Color for drawing traversal highlight. */
+    int inset;			/* Total width of all borders, including
+				 * traversal highlight and 3-D border.
+				 * Indicates how much interior stuff must be
+				 * offset from outside edges to leave room for
+				 * borders. */
+    GC pixmapGC;		/* Used to copy bits from a pixmap to the
+				 * screen and also to clear the pixmap. */
+    int width, height;		/* Dimensions to request for canvas window,
+				 * specified in pixels. */
+    int redrawX1, redrawY1;	/* Upper left corner of area to redraw, in
+				 * pixel coordinates. Border pixels are
+				 * included. Only valid if REDRAW_PENDING flag
+				 * is set. */
+    int redrawX2, redrawY2;	/* Lower right corner of area to redraw, in
+				 * integer canvas coordinates. Border pixels
+				 * will *not* be redrawn. */
+    int confine;		/* Non-zero means constrain view to keep as
+				 * much of canvas visible as possible. */
+
+    /*
+     * Information used to manage the selection and insertion cursor:
+     */
+
+    Tk_CanvasTextInfo textInfo; /* Contains lots of fields; see tk.h for
+				 * details. This structure is shared with the
+				 * code that implements individual items. */
+    int insertOnTime;		/* Number of milliseconds cursor should spend
+				 * in "on" state for each blink. */
+    int insertOffTime;		/* Number of milliseconds cursor should spend
+				 * in "off" state for each blink. */
+    Tcl_TimerToken insertBlinkHandler;
+				/* Timer handler used to blink cursor on and
+				 * off. */
+
+    /*
+     * Transformation applied to canvas as a whole: to compute screen
+     * coordinates (X,Y) from canvas coordinates (x,y), do the following:
+     *
+     * X = x - xOrigin;
+     * Y = y - yOrigin;
+     */
+
+    int xOrigin, yOrigin;	/* Canvas coordinates corresponding to
+				 * upper-left corner of window, given in
+				 * canvas pixel units. */
+    int drawableXOrigin, drawableYOrigin;
+				/* During redisplay, these fields give the
+				 * canvas coordinates corresponding to the
+				 * upper-left corner of the drawable where
+				 * items are actually being drawn (typically a
+				 * pixmap smaller than the whole window). */
+
+    /*
+     * Information used for event bindings associated with items.
+     */
+
+    Tk_BindingTable bindingTable;
+				/* Table of all bindings currently defined for
+				 * this canvas. NULL means that no bindings
+				 * exist, so the table hasn't been created.
+				 * Each "object" used for this table is either
+				 * a Tk_Uid for a tag or the address of an
+				 * item named by id. */
+    Tk_Item *currentItemPtr;	/* The item currently containing the mouse
+				 * pointer, or NULL if none. */
+    Tk_Item *newCurrentPtr;	/* The item that is about to become the
+				 * current one, or NULL. This field is used to
+				 * detect deletions of the new current item
+				 * pointer that occur during Leave processing
+				 * of the previous current item. */
+    double closeEnough;		/* The mouse is assumed to be inside an item
+				 * if it is this close to it. */
+    XEvent pickEvent;		/* The event upon which the current choice of
+				 * currentItem is based. Must be saved so that
+				 * if the currentItem is deleted, can pick
+				 * another. */
+    int state;			/* Last known modifier state. Used to defer
+				 * picking a new current object while buttons
+				 * are down. */
+
+    /*
+     * Information used for managing scrollbars:
+     */
+
+    char *xScrollCmd;		/* Command prefix for communicating with
+				 * horizontal scrollbar. NULL means no
+				 * horizontal scrollbar. Malloc'ed. */
+    char *yScrollCmd;		/* Command prefix for communicating with
+				 * vertical scrollbar. NULL means no vertical
+				 * scrollbar. Malloc'ed. */
+    int scrollX1, scrollY1, scrollX2, scrollY2;
+				/* These four coordinates define the region
+				 * that is the 100% area for scrolling (i.e.
+				 * these numbers determine the size and
+				 * location of the sliders on scrollbars).
+				 * Units are pixels in canvas coords. */
+    char *regionString;		/* The option string from which scrollX1 etc.
+				 * are derived. Malloc'ed. */
+    int xScrollIncrement;	/* If >0, defines a grid for horizontal
+				 * scrolling. This is the size of the "unit",
+				 * and the left edge of the screen will always
+				 * lie on an even unit boundary. */
+    int yScrollIncrement;	/* If >0, defines a grid for horizontal
+				 * scrolling. This is the size of the "unit",
+				 * and the left edge of the screen will always
+				 * lie on an even unit boundary. */
+
+    /*
+     * Information used for scanning:
+     */
+
+    int scanX;			/* X-position at which scan started (e.g.
+				 * button was pressed here). */
+    int scanXOrigin;		/* Value of xOrigin field when scan started. */
+    int scanY;			/* Y-position at which scan started (e.g.
+				 * button was pressed here). */
+    int scanYOrigin;		/* Value of yOrigin field when scan started. */
+
+    /*
+     * Information used to speed up searches by remembering the last item
+     * created or found with an item id search.
+     */
+
+    Tk_Item *hotPtr;		/* Pointer to "hot" item (one that's been
+				 * recently used. NULL means there's no hot
+				 * item. */
+    Tk_Item *hotPrevPtr;	/* Pointer to predecessor to hotPtr (NULL
+				 * means item is first in list). This is only
+				 * a hint and may not really be hotPtr's
+				 * predecessor. */
+
+    /*
+     * Miscellaneous information:
+     */
+
+    Tk_Cursor cursor;		/* Current cursor for window, or NULL. */
+    char *takeFocus;		/* Value of -takefocus option; not used in the
+				 * C code, but used by keyboard traversal
+				 * scripts. Malloc'ed, but may be NULL. */
+    double pixelsPerMM;		/* Scale factor between MM and pixels; used
+				 * when converting coordinates. */
+    int flags;			/* Various flags; see below for
+				 * definitions. */
+    int nextId;			/* Number to use as id for next item created
+				 * in widget. */
+    Tk_PostscriptInfo psInfo;	/* Pointer to information used for generating
+				 * Postscript for the canvas. NULL means no
+				 * Postscript is currently being generated. */
+    Tcl_HashTable idTable;	/* Table of integer indices. */
+
+    /*
+     * Additional information, added by the 'dash'-patch
+     */
+
+    void *reserved1;
+    Tk_State canvas_state;	/* State of canvas. */
+    void *reserved2;
+    void *reserved3;
+    Tk_TSOffset tsoffset;
+#ifndef USE_OLD_TAG_SEARCH
+    TagSearchExpr *bindTagExprs;/* Linked list of tag expressions used in
+				 * bindings. */
+#endif
+} TkCanvas;
+
+/*
+ * Flag bits for canvases:
+ *
+ * REDRAW_PENDING -		1 means a DoWhenIdle handler has already been
+ *				created to redraw some or all of the canvas.
+ * REDRAW_BORDERS - 		1 means that the borders need to be redrawn
+ *				during the next redisplay operation.
+ * REPICK_NEEDED -		1 means DisplayCanvas should pick a new
+ *				current item before redrawing the canvas.
+ * GOT_FOCUS -			1 means the focus is currently in this widget,
+ *				so should draw the insertion cursor and
+ *				traversal highlight.
+ * CURSOR_ON -			1 means the insertion cursor is in the "on"
+ *				phase of its blink cycle. 0 means either we
+ *				don't have the focus or the cursor is in the
+ *				"off" phase of its cycle.
+ * UPDATE_SCROLLBARS -		1 means the scrollbars should get updated as
+ *				part of the next display operation.
+ * LEFT_GRABBED_ITEM -		1 means that the mouse left the current item
+ *				while a grab was in effect, so we didn't
+ *				change canvasPtr->currentItemPtr.
+ * REPICK_IN_PROGRESS -		1 means PickCurrentItem is currently
+ *				executing. If it should be called recursively,
+ *				it should simply return immediately.
+ * BBOX_NOT_EMPTY -		1 means that the bounding box of the area that
+ *				should be redrawn is not empty.
+ */
+
+#define REDRAW_PENDING		1
+#define REDRAW_BORDERS		2
+#define REPICK_NEEDED		4
+#define GOT_FOCUS		8
+#define CURSOR_ON		0x10
+#define UPDATE_SCROLLBARS	0x20
+#define LEFT_GRABBED_ITEM	0x40
+#define REPICK_IN_PROGRESS	0x100
+#define BBOX_NOT_EMPTY		0x200
+
+/*
+ * Flag bits for canvas items (redraw_flags):
+ *
+ * FORCE_REDRAW -		1 means that the new coordinates of some item
+ *				are not yet registered using
+ *				Tk_CanvasEventuallyRedraw(). It should still
+ *				be done by the general canvas code.
+ */
+
+#define FORCE_REDRAW		8
+
+/*
+ * Canvas-related functions that are shared among Tk modules but not exported
+ * to the outside world:
+ */
+
+MODULE_SCOPE int	TkCanvPostscriptCmd(TkCanvas *canvasPtr,
+			    Tcl_Interp *interp, int argc, const char **argv);
+MODULE_SCOPE int 	TkCanvTranslatePath(TkCanvas *canvPtr,
+			    int numVertex, double *coordPtr, int closed,
+			    XPoint *outPtr);
+/*
+ * Standard item types provided by Tk:
+ */
+
+MODULE_SCOPE Tk_ItemType tkArcType, tkBitmapType, tkImageType, tkLineType;
+MODULE_SCOPE Tk_ItemType tkOvalType, tkPolygonType;
+MODULE_SCOPE Tk_ItemType tkRectangleType, tkTextType, tkWindowType;
+
+/*
+ * Convenience macro.
+ */
+
+#define Canvas(canvas) ((TkCanvas *) (canvas))
+
+#endif /* _TKCANVAS */