Subj : Re: menu item choice question...?
To   : borland.public.cpp.borlandcpp
From : mujeebrm
Date : Sat Sep 17 2005 11:37 am

thanx Wayne,

mujeebrm
"Wayne A. King" <waking@idirect.com> wrote in message 
news:432af97e.20413864@newsgroups.borland.com...
> On Thu, 15 Sep 2005 21:55:29 +0500, mujeebrm <mujeebrm@y!.com=yahoo> 
> wrote:
>
>>/* menu.c, bc 5.02/tc 3, winxp */
>>/* plz help me in this logic, how can i modify this my program
>>    of a simple menu so that when i press down arrow key it
>>    makes previous items bgcolor black and fgcolor white and
>>    selected items bgcolor red and fgcolor white and vice versa
>>    and when i press enter it should call respective function
>>    this should keep going on untill i press enter on exit menu item...?
> [snip]
>
> At this time, I have neither time nor inclination to analyze or modify 
> your
> example. See if this old example from my archives gives you some
> ideas as to how to approach the problem:
>
> /****************** LIGHTBAR.C ********************/
> /** Based on Public Domain code by Roger Scudder **/
> /** originally posted in the FIDO C_Echo - 01/96 **/
> /** Compiled with Borland Turbo C++ v3.0 for DOS **/
> /** -------------------------------------------- **/
> /** Modifications made by Wayne A. King 03/96    **/
> /** (1) Added HOME, END, PAGE_UP, and PAGE_DOWN  **/
> /**     processing.                              **/
> /** (2) Added roll-over of bar positioning when  **/
> /**     at first or last item.                   **/
> /** (3) Added menu item selection by number.     **/
> /** (4) Added cursor on/off code.                **/
> /** (5) Added display of menu selection at end.  **/
> /**************************************************/
> #include <stdlib.h>
> #include <conio.h>
>
> /* key values */
> #define UP             72
> #define DOWN           80
> #define ESC            27
> #define ENTER          13
> #define HOME           71
> #define END            79
> #define PAGE_UP        73
> #define PAGE_DOWN      81
>
> /* limits */
> #define NUM_ITEMS       4
> #define FIRST_ROW       5
>
> /* define an array of pointers to the menuitems */
> char *item[NUM_ITEMS] = { "[1] Word Perfect 5.1   ",
>                          "[2] Lotus 123          ",
>                          "[3] Turbo C++ 3.0      ",
>                          "[4] Qedit              "  };
>
> void showlight(char *s, int col, int row) /* show menuitem highlighted */
> {
>    textcolor(BLACK);
>    textbackground(WHITE);
>    gotoxy(col, row);
>    cputs(s);
>    textcolor(LIGHTCYAN);
>    textbackground(BLACK);
>    gotoxy(col, row);
> }
>
> int menu(void) /* return: number of menuitem or -1 if Esc is pressed */
> {
>    int col = 30, row = FIRST_ROW, key, ext, i;
>
>    clrscr();
>    textcolor(WHITE);
>    textbackground(BLACK);
>    gotoxy(col, row-2);
>
>    cputs(" >>>> PROGRAMS <<<<");
>
>    textcolor(LIGHTCYAN);
>    for(i = NUM_ITEMS - 1; i > 0; i--)
>        {
>        gotoxy(col, row + i);
>        cputs(item[i]);
>        }
>    showlight(item[i] , col, row);
>
>    /* handle user key strokes */
>    for(;;)
>    {
>        ext = 0;
>        if((key = getch()) == 0)
>            ext = getch();
>
>        switch(ext)
>        {
>            case PAGE_UP:
>            case HOME:  cputs(item[row - FIRST_ROW]);
>                        row = FIRST_ROW;
>                        break;
>            case PAGE_DOWN:
>            case END:   cputs(item[row - FIRST_ROW]);
>                        row = FIRST_ROW + NUM_ITEMS - 1;
>                        break;
>            case UP:    cputs(item[row - FIRST_ROW]);
>                        if(row == FIRST_ROW)
>                            {
>                            row += NUM_ITEMS-1;
>                            break;
>                            }
>                        if(row > FIRST_ROW)
>                            row--;
>                        break;
>            case DOWN:  cputs(item[row - FIRST_ROW]);
>                        if(row == FIRST_ROW + NUM_ITEMS - 1)
>                            {
>                            row -= NUM_ITEMS-1;
>                            break;
>                            }
>                        if(row < FIRST_ROW + NUM_ITEMS - 1)
>                           row++;
>                        break;
>        }
>        if(key == ENTER) return row - FIRST_ROW;
>        if(key == ESC) return -1;
>        key -= 0x30;
>        if(key > 0 && key <= NUM_ITEMS) /* menu item number */
>            {
>            cputs(item[row - FIRST_ROW]);
>            row = FIRST_ROW+key-1;
>            showlight(item[key-1], col, row);
>            return key-1;
>            }
>        showlight(item[row - FIRST_ROW], col, row);
>    }
> }
>
> int main(void)
> {
>    int itemno;
>
>    _setcursortype(_NOCURSOR);
>    itemno = menu();
>    gotoxy(1, 24);
>    if(itemno == -1) cprintf("Escape key pressed!");
>    else cprintf("You selected menu item %s", item[itemno]);
>    _setcursortype(_NORMALCURSOR);
>    return EXIT_SUCCESS;
> }
>
> --
> Wayne A. King
> (waking@idirect.com, Wayne_A_King@compuserve.com)

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