/*

    viDOOM - level editor for DOOM

    Copyright (C) 2000  Ian Cowburn (ianc@noddybox.demon.co.uk)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program 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 General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    -------------------------------------------------------------------------

			 Platform specific GUI routines

    This is the platform specific routines for pop-up menus, dialogs and
    file selectors.  More DOOM graphics orientied GUI is handled by the
    generic GUI (gui.h) that is built on top of gfx.

    As with the platform specific GFX all calls can be differentiated from
    the generic gui by starting with GUI_, rather than Gui.

    Note that all these routines are expected to preserve screen contents.

    $Id$

*/

#ifndef VIDOOM_PLATGUI_H
#define VIDOOM_PLATGUI_H

#include "gfx.h"

/* Type for a picklist, where each entry has an associated grahpic.  If the
   image is NULL then no picture should be shown for that entry.
*/
typedef struct
	{
	char		*text;
	GFX_IMAGE	img;
	int		client_index;	/* Returned by GUI_image_picklist() */
	} PLAT_IMG_PICKLIST;


/* Type for a picklist
*/
typedef struct
	{
	char		*text;
	int		client_index;	/* Returned by GUI_client_picklist() */
	} PLAT_PICKLIST;


/* Types to define a menu
*/
typedef struct PLATMENU
	{
	char		*text;		/* Text to display */
	int		client_index;	/* Value returned by GUI_menu() */
	struct PLATMENU	*child;		/* NULL if no child menu, else */
					/* pointer to other menu array. */
	} PLAT_MENU;


/* Types to define a radio box
*/
typedef struct
	{
	char		*text;		/* Label for this button.  NULL = end */
	int		client_index;	/* Value returned by GUI_radio() */
	} PLAT_RADIO;

/* Types to define a multi flag box
*/
typedef struct
	{
	char		*text;		/* Label.  NULL = end */
	int		group;		/* To group flags (0 = don't group) */
	int		val;		/* TRUE = set, FALSE = flag clear */
	} PLAT_MULTI;

/* Types to define a simple dialog
*/
#define PLAT_DIAL_MAXSTRLEN	128

#define PLAT_DIAL_STRING	0
#define PLAT_DIAL_INTEGER	1
#define PLAT_DIAL_DOUBLE	2
#define PLAT_DIAL_PICKLIST	3

/* This is the picklist type that can be used inside a DIALOG.  It matters
   not how it's implemented, but it should be able to use large picklists
   (eg. the amount of the list seen should be automatically limited).
*/
typedef struct	
	{
	int		no;		/* No of items */
	int		current;	/* Currently selected item */
	char		**text;		/* Text for items - used as *item[] */
	} PLAT_DIAL_PL;

typedef struct
	{
	char		*text;		/* Label for item.  NULL = no label */
	int		type;		/* Data type (PLAT_DIAL_xxx) */
	union 				/* Data */
	    {
	    int			i;
	    char		s[PLAT_DIAL_MAXSTRLEN+1];
	    double		d;
	    PLAT_DIAL_PL	pl;
	    } data;
	} PLAT_DIALOG;


/* Inform GUI of screen size if required
*/
void	GUI_setscreen(int w,int h);

/* Display a Yes/No option box.  Returns TRUE/FALSE accordingly.  The text
   defined by question should be split over lines where a '|' character appears.
*/
int	GUI_yesno(char *question);


/* Starts a Yes/No/Yes to All/No to All cycle.  After calling this
   GUI_yesno_all() is reset to it's initial state.
*/
void	GUI_start_yesno_all(void);


/* Works like GUI_yesno(), but displays to extra options - "Yes to All" and
   "No to All".  If either of these options are selected then further calls
   to this function should return TRUE/FALSE accordingly, until
   GUI_start_yesno__all() is called.
*/
int	GUI_yesno_all(char *question);


/* Displays a dialog with the title and text supplied.  This text should split
   where a '|' character appears. A sole button containing the supplied
   button_text should be displayed.
*/
void	GUI_alert(char *title, char *text, char *button_text);


/* Pop-up/display a menu.  Return the client_index of the selected item from the
   menus, or defval for no selection.  The co-ords can obviously be ignored or
   honoured, though honouring is preferable.

   MENU array is terminated by one with a NULL text entry.
*/
int	GUI_menu(char *title, int x, int y, PLAT_MENU menu[], int defval);


/* Allow selection of a filename.  Returns NULL if cancelled, otherwise the
   selected path with must be Releas()'ed later.

   If supported then files ending with filter should only be displayed.  Filter
   should be NULL to show all files.
*/
char	*GUI_fsel(char *title, char *default_path, char *filter);


/* Display a picklist.  The items are described by the array of pointers
   passed in, which terminates with a NULL pointer.  The index to the selected
   item is returned, or -1 if the pickbox was cancelled.
*/
int	GUI_picklist(char *title,char *opts[]);


/* Does a picklist as above, but works on structures cntaining client return
   values, rather than simple array indexes.
*/
int	GUI_client_picklist(char *title,PLAT_PICKLIST opts[],int defval);


/* Display a picklist with associated images.  The items are described by the
   array of structs passed in, which terminates with a NULL pointer in the
   text field.  The client index data in the selected item is returned, or 
   defval if the pickbox was cancelled.

   If this cannot be supported on the platform then the minimum this should
   do is a sideways call to GUI_client_picklist()
*/
int	GUI_image_picklist(char *title,PLAT_IMG_PICKLIST opts[],int defval);


/* Display a radio box.  The items are described by the array of structs
   passed in, which terminates with a NULL pointer in the text field.
   The client index data in the selected item is returned, or defval if the
   radio box was cancelled.

   If one of the entries client index values is the same as current then that
   option will be the one selected when the radio box is displayed.  Otherwise
   the first item will be the selected one.
*/
int	GUI_radio_box(char *title,PLAT_RADIO opts[],int current,int defval);

/* Display a mutli-selection radio box.  The items are described by the array
   of PLAT_MULTI passed in.

   Returns TRUE if dialog accepted, otherwise FALSE.
*/
int	GUI_multi_box(char *title,PLAT_MULTI p[]);


/* Displays a very simple dialog made up of 'no' fields as defined in pd[].
   Returns TRUE if the dialog is accepted, FALSE otherwise.

   Note that as the values in the PLAT_DIALOG array are not pointing to
   actual client data they need not be preserved on a cancel of the dialog.
*/
int	GUI_dialog(char *title, int no, PLAT_DIALOG pd[]);


/* Displays the contents of a file.  The form this display takes is not really
   of any concern to viDOOM.
   
   Control codes should just be filtered out.  Tabs should be converted to
   spaces, or honoured.

   This interface is used for reading the license from the menu, and for
   reading the results from running the node builder.
*/
void	GUI_view_file(char *title, char *path);


/* Allows simple text editting.  The form this display takes is not really
   of any concern to viDOOM (if applicable it would be more than OK to start
   an external text editor).

   text is a pointer to the original text, which is one long string with line
   breaks denoted by the '\n' character.  Note that lines should _only_ be
   terminated with the \n character (ie. MSDOS stlye \r\n need not be accepted
   by this routine).

   The return is a newly allocated copy of the edited text is the text is OKed.
   The return is NULL if the text is cancelled.

   In either case, the original string pointed to by text should be as it was.
*/
char	*GUI_text_edit(char *title, char *text);


#endif


/* END OF FILE */