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/*
 * WidgetInfo.h -- Zinc Widget record.
 *
 * Authors		: Patrick Lecoanet.
 * Creation date	: Mon Feb  1 12:13:24 1999
 *
 * $Id$
 */

/*
 *  Copyright (c) 1993 - 1999 CENA, Patrick Lecoanet --
 *
 * This code is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This code is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this code; if not, write to the Free
 * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 *
 */


#ifndef _WidgetInfo_h
#define _WidgetInfo_h


#include <X11/Xlib.h>
#include <X11/Xutil.h>

#include "Item.h"
#include "Transfo.h"
#include "Types.h"


#ifndef NUM_ALPHA_STEPS
#define NUM_ALPHA_STEPS		16
#endif

/* Constants for flags */

#define REPICK_IN_PROGRESS	1
#define LEFT_GRABBED_ITEM	2
#define INTERNAL_NEED_REPICK	8


/*
 * 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 _TextInfo {
  ZnColor	sel_color;	/* Background color for selected text.
				 * Read-only to items.*/
  Item		sel_item;	/* Pointer to selected item. ZN_NO_ITEM
				 * means that the widget doesn't own the
				 * selection. Writable by items. */
  int		sel_first;	/* Index of first selected character. 
				 * Writable by items. */
  int		sel_last;	/* Index of last selected character. 
				 * Writable by items. */
  Item		anchor_item;	/* Item corresponding to sel_anchor: not
				 * necessarily sel_item. Read-only to items. */
  int		sel_anchor;	/* Fixed end of selection (i.e. "select to"
				 * operation will use this as one end of the
				 * selection).  Writable by items. */
  ZnColor	insert_color;	/* Used to draw vertical bar for insertion
				 * cursor.  Read-only to items. */
  int		insert_width;	/* Total width of insertion cursor.  Read-only
				 * to items. */
  Item		focus_item;	/* Item that currently has the input focus,
				 * or ZN_NO_ITEM if no such item.  Read-only to
				 * items.  */
  ZnBool	got_focus;	/* True means that the widget has the input
				 * focus.  Read-only to items.*/
  ZnBool	cursor_on;	/* True means that an insertion cursor should
				 * be displayed in focus_item. Read-only to
				 * items.*/
  struct _ColorGradient *sel_relief;
  struct _ColorGradient *insert_relief;
} TextInfo;

typedef struct _WidgetInfo {
  Tcl_Interp		*interp;	/* Interpreter associated with widget.	*/
  Tcl_Command		cmd;		/* Token for zinc widget command.	*/
  Tcl_HashTable		*tag_table;	/* Hash table for object tags.		*/
  Tcl_HashTable		*id_table;	/* Hash table for object ids.		*/
  Tcl_HashTable		*t_table;	/* Hash table for transformations.	*/
  unsigned long		obj_id;		/* Id for the next new object.		*/
  Tk_BindingTable	binding_table;	/* Table of all bindings currently defined
					 * for this widget.  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.	*/
  int			state;		/* Last known modifier state.  Used to
					 * defer picking a new current object
					 * while buttons are down. */
  Item			current_item;	/* Item picked from previous pick sequence */
  Item			new_item;	/* Item picked from current pick sequence */
  int			current_part;
  int			new_part;
  XEvent		pick_event;	/* Event used to forge fake events and to do
					 * repicks. */
  ZnBool		update_pending;	/* True means there is a pending graphic
					 * update. */
  ZnBBox		exposed_area;	/* Window area that need to be rexposed.
					 * It is distinct from redraw_area which
					 * is updated when items are changed. */
  Pixmap		alpha_stipples[NUM_ALPHA_STEPS];
  int			border_width;
  int			opt_width;	/* Window size as stated/reported by the option. */
  int			opt_height;	/* They are equal to the width/height fields after
					 * the actual resize. They may to be equal if
					 * the resize is not acknowledged by the geo
					 * manager. */
  Tk_3DBorder		bg_border;	/* The data describing the background
					 * and border colors. */
  ReliefStyle		relief;		/* The border relief. */
  
  /* Tracks global resources	*/
  int			track_managed_history_size;	/* Size of history for tracks	*/
  ZnBool		track_manage_history;	/* Tell if the tracks manage their	*/
						/* histories.				*/
  int			speed_vector_length; /* How long (in time) are speedvectors*/
#ifdef OM
  int			om_group_id;	/* Tell which group contains tracks to be	*/
  Item			om_group;	/* processed for anti label overlap.		*/
#endif

  /* Maps global resources */
  ZnFont		map_text_font;		/* Font for texts in Map items		*/
  Pixmap		map_distance_symbol;
						/* display distance marks along Map	*/
						/* lines.				*/
  /* Transformer */
  ZnTransfo		*current_transfo;
  ZnList		transfo_stack;
  struct _ClipState	*current_clip;
  ZnList		clip_stack;
  
  /* Others */
  ZnColor		fore_color;		/* Default foreground used in new items */
  ZnColor		back_color;		/* Color of the widget background.	*/
  ZnColor		bbox_color;		/* Color used to draw bboxes (debug).	*/
  Cursor		cursor;			/* Cursor displayed in zinc window.	*/
  ZnBool		draw_bboxes;		/* Draw item's bboxes (debug).		*/
  int			light_angle;
  
  int			pick_aperture;		/* size of pick aperture in pixels	*/
  ZnFont		font;			/* Default font used in new items */
  ZnBool		reshape;		/* Use the Shape Extension on the window.*/
  ZnBool		full_reshape;		/* Use it on the top level window.	*/
  char			*tile_name;
  ZnImage		tile;
  
  /* Zinc private resources */
  int			width;			/* Actual window dimension. */
  int			height;
  int			inset;			/* Border and highlight width */
  
  /* Graphic variables */
  Display		*dpy;			/* The display of the widget window.	*/
  Screen		*screen;
  ZnWindow		win;			/* The window of the widget. */
  ZnBool		realized;
  Pixmap		draw_buffer;		/* Pixmap for double buffering		*/
  ZnBBox		damaged_area;		/* The current damaged rectangle	*/
  GC			gc;
  ZnBool		has_x_shm;		/* Tell if the SHM X11 ext is avail.	*/
  ZnBool		has_x_shape;		/* Tell if she Shape X ext. is avail.	*/
  ZnBool		has_x_input;		/* Tell if she X input ext. is avail.	*/
  int			events_flags;		/* NEED_REPICK et al */
  Window		real_top;
  Item			top_group;
  ZnList		work_item_list;		/* Temporary item list used in internal
						 * works. */
  ZnList		work_pts;		/* Temporary point lists. */
  ZnList		work_xpts;

  /* Text management */
  TextInfo		text_info;
  int			insert_on_time;
  int			insert_off_time;
  Tcl_TimerToken	blink_handler;
  char			*take_focus;
  int			highlight_width;	/* Width in pixels of highlight to draw
						 * around widget when it has the focus.
						 * = 0 means don't draw a highlight. */
  ZnColor		highlight_bg_color;	/* Color for drawing traversal highlight
						 * area when highlight is off. */
  ZnColor		highlight_color;	/* Color for drawing traversal highlight.*/
  
  /* Perf measurement variables. */
  ZnBool		monitoring;
  int			num_updates;
  int			last_time;
  int			total_time;
  int			num_items;
} WidgetInfo;

  
#ifdef __CPLUSPLUS__
}
#endif

#endif /* _WidgetInfo_h */