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/* -*- c -*- ------------------------------------------------------------- *
*
* Copyright 2004 Murali Krishnan Ganapathy - All Rights Reserved
*
* 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, Inc., 53 Temple Place Ste 330,
* Bostom MA 02111-1307, USA; either version 2 of the License, or
* (at your option) any later version; incorporated herein by reference.
*
* ----------------------------------------------------------------------- */
/* This program can be compiled for DOS with the OpenWatcom compiler
* (http://www.openwatcom.org/):
*
* wcl -3 -osx -mt <filename>.c
*/
#ifndef __MENU_H__
#define __MENU_H__
#include "biosio.h"
#include "string.h"
// Scancodes of some keys
#define ESCAPE 1
#define ENTERA 28
#define ENTERB 224
#define HOMEKEY 71
#define UPARROW 72
#define PAGEUP 73
#define LTARROW 75
#define RTARROW 77
#define ENDKEY 79
#define DNARROW 80
#define PAGEDN 81
#define SPACEKEY 57 // Scan code for SPACE
// Attributes
#define NORMALATTR 0x17
#define REVERSEATTR 0x70
#define INACTATTR 0x18
#define REVINACTATTR 0x78
#define STATUSATTR 0x74
#define FILLCHAR 177
#define FILLATTR 0x01
#define SHADOWATTR 0x00
#define SPACECHAR ' '
#define TFILLCHAR ' '
#define TITLEATTR 0x70
// Single line Box drawing Chars
#define TOPLEFT 218
#define BOTLEFT 192
#define TOPRIGHT 191
#define BOTRIGHT 217
#define TOP 196
#define BOT 196
#define LEFT 179
#define RIGHT 179
#define HORIZ 196
#define LTRT 195 // The |- char
#define RTLT 180 // The -| char
// Double line Box Drawing Chars
/*
#define TOPLEFT 201
#define BOTLEFT 200
#define TOPRIGHT 187
#define BOTRIGHT 188
#define TOP 205
#define BOT 205
#define LEFT 186
#define RIGHT 186
#define HORIZ 205
#define LTRT 199 // The ||- char
#define RTLT 182 // The -|| char
*/
// Attributes of the menu system
#define MAXMENUS 8 // Maximum number of menu's allowed
#define MAXMENUSIZE 12 // Maximum number of entries in each menu
// Upper bounds on lengths
// Now that the onus of allocating space is with the user, these numbers
// are only for sanity checks. You may increase these values without
// affecting the memory footprint of this program
#define MENULEN 30 // Each menu entry is atmost MENULEN chars
#define STATLEN 80 // Maximum length of status string
#define ACTIONLEN 80 // Maximum length of an action string
// Layout of menu
#define MENUROW 3 // Row where menu is displayed (relative to window)
#define MENUCOL 4 // Col where menu is displayed (relative to window)
#define MENUPAGE 1 // show in display page 1
#define STATLINE 23 // Line number where status line starts (relative to window)
// Other Chars
#define SUBMENUCHAR 175 // This is >> symbol
#define EXITMENUCHAR 174 // This is << symbol
#define CHECKED 251 // Check mark
#define UNCHECKED 250 // Light bullet
typedef enum {OPT_INACTIVE, OPT_SUBMENU, OPT_RUN, OPT_EXITMENU, OPT_CHECKBOX,
OPT_RADIOBTN, OPT_EXIT, OPT_SEP} t_action;
typedef union {
char submenunum;
char checked; // For check boxes
char choice; // For Radio buttons
} t_itemdata;
struct s_menuitem;
struct s_menu;
struct s_menusystem;
typedef void (*t_item_handler)(struct s_menusystem *, struct s_menuitem *);
typedef void (*t_menusystem_handler)(struct s_menusystem *, struct s_menuitem *);
typedef struct s_menuitem {
const char *item; //char item[MENULEN+2];
const char *status; //char status[STATLEN+2];
const char *data; //char data[ACTIONLEN+2];
void * extra_data; // Any other data user can point to
t_item_handler handler; // Pointer to function of type menufn
char active; // Is this item active or not
t_action action;
t_itemdata itemdata; // Data depends on action value
char index; // Index within the menu array
char parindex; // Index of the menu in which this item appears.
} t_menuitem;
typedef struct s_menu {
t_menuitem items[MAXMENUSIZE];
const char *title; //char title[MENULEN+2];
char numitems;
char menuwidth;
} t_menu;
typedef struct s_menusystem {
t_menu menus[MAXMENUS];
const char *title; //char title[80]; // Maximum title length
t_menusystem_handler handler; // Handler function called every time a menu is re-printed.
char nummenus;
char normalattr;
char reverseattr;
char inactattr;
char revinactattr;
char statusattr;
char fillchar;
char fillattr;
char spacechar;
char tfillchar;
char titleattr;
char shadowattr;
char statline;
char menupage;
char maxrow,minrow,numrows; // Number of rows in the window
char maxcol,mincol,numcols; // Number of columns in the window
} t_menusystem;
/************************************************************************
* IMPORTANT INFORMATION
*
* All functions which take a string as argument store the pointer
* for later use. So if you have alloc'ed a space for the string
* and are passing it to any of these functions, DO NOT deallocate it.
*
* If they are constant strings, you may receive warning from the compiler
* about "converting from char const * to char *". Ignore these errors.
*
* This hack/trick of storing these pointers will help in reducing the size
* of the internal structures by a lot.
*
***************************************************************************
*/
t_menuitem * showmenus(char startmenu);
void init_menusystem(const char *title); // This pointer value is stored internally
void set_normal_attr(char normal, char selected, char inactivenormal, char inactiveselected);
void set_status_info(char statusattr, char statline);
void set_title_info(char tfillchar, char titleattr);
void set_misc_info(char fillchar, char fillattr,char spacechar, char shadowattr);
void set_window_size(char top, char left, char bot, char right); // Set the window which menusystem should use
void reg_handler( t_menusystem_handler handler); // Register handler
void unreg_handler();
// Create a new menu and return its position
char add_menu(const char *title); // This pointer value is stored internally
// Add item to the "current" menu // pointer values are stored internally
t_menuitem * add_item(const char *item, const char *status, t_action action, const char *data, char itemdata);
// Add a separator to the "current" menu
void add_sep();
// Main function for the user's config file
int menumain(char *cmdline);
#endif
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