diff options
Diffstat (limited to 'menu/menu.h')
| -rw-r--r-- | menu/menu.h | 76 |
1 files changed, 52 insertions, 24 deletions
diff --git a/menu/menu.h b/menu/menu.h index 1de36ec8..c6b2cf3e 100644 --- a/menu/menu.h +++ b/menu/menu.h @@ -51,8 +51,6 @@ #define TFILLCHAR ' ' #define TITLEATTR 0x70 -#define TITLESTR "COMBOOT Menu System for SYSLINUX developed by Murali Krishnan Ganapathy" - // Single line Box drawing Chars #define TOPLEFT 218 @@ -63,6 +61,9 @@ #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 /* @@ -74,27 +75,37 @@ #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 10 // Maximum number of menu's allowed -#define MAXMENUSIZE 10 // Maximum number of entries in each menu -#define MENULEN 30 // Each menu entry is atmost MENULEN chars including the terminating $ -#define STATLEN 70 // Maximum length of status string +#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 -#define MENUCOL 4 // Col where menu is displayed +#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 +#define STATLINE 23 // Line number where status line starts (relative to window) // Other Chars -#define SUBMENUCHAR 175 // This is >> symbol, << is 174 +#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} t_action; +typedef enum {OPT_INACTIVE, OPT_SUBMENU, OPT_RUN, OPT_EXITMENU, OPT_CHECKBOX, + OPT_RADIOBTN, OPT_EXIT, OPT_SEP} t_action; typedef union { char submenunum; @@ -110,9 +121,9 @@ 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 { - char item[MENULEN+2]; - char status[STATLEN+2]; - char data[ACTIONLEN+2]; + 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 @@ -124,14 +135,14 @@ typedef struct s_menuitem { typedef struct s_menu { t_menuitem items[MAXMENUSIZE]; - char title[MENULEN+2]; + const char *title; //char title[MENULEN+2]; char numitems; char menuwidth; } t_menu; typedef struct s_menusystem { - t_menu menus[MAXMENUS]; - char title[80]; // Maximum title length + 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; @@ -147,15 +158,29 @@ typedef struct s_menusystem { char shadowattr; char statline; char menupage; - char maxrow,minrow,numrows; // Number of rows in the current text mode - char maxcol,mincol,numcols; // Number of columns in the current text mode + char maxrow,minrow,numrows; // Number of rows in the window + char maxcol,mincol,numcols; // Number of columns in the window } t_menusystem; -// User callable Functions +/************************************************************************ + * 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); +void init_menusystem(const char *title); // This pointer value is stored internally void set_normal_attr(char normal, char selected, char inactivenormal, char inactiveselected); @@ -172,10 +197,13 @@ void reg_handler( t_menusystem_handler handler); // Register handler void unreg_handler(); // Create a new menu and return its position -int add_menu(const char *title); +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 item to the "current" menu -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); |