Creating menu driven environment in C in Unix.

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Home » C Home » C on Unix Home » Creating menu driven environment in C in Unix.

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Title	Creating menu driven environment in C in Unix.
Author	Venkatachalam
Author Email	grve25 [at] gmail.com
Description	ItS purpose is to provide a menu driven environment in c & c++ environment in unix platform. To compile: cc filename.c-ncurser
Category	C » C on Unix
Hits	379176
Code	Select and Copy the Code
#include <curses.h> #include <stdlib.h> #define ENTER 10 #define ESCAPE 27 void init_curses() { initscr(); start_color(); init_pair(1,COLOR_WHITE,COLOR_BLUE); init_pair(2,COLOR_RED,COLOR_GREEN); init_pair(3,COLOR_RED,COLOR_WHITE); init_pair(4,COLOR_BLUE,COLOR_YELLOW); init_pair(5,COLOR_BLUE,COLOR_CYAN); curs_set(0); noecho(); keypad(stdscr,TRUE); } void draw_menubar(WINDOW menubar) { wbkgd(menubar,COLOR_PAIR(5)); waddstr(menubar,"File"); wattron(menubar,COLOR_PAIR(3)); waddstr(menubar,"(F1)"); wattroff(menubar,COLOR_PAIR(3)); wmove(menubar,0,10); waddstr(menubar,"Edit"); wattron(menubar,COLOR_PAIR(3)); waddstr(menubar,"(F2)"); wmove(menubar,0,20); wattroff(menubar,COLOR_PAIR(3)); waddstr(menubar,"Search"); wattron(menubar,COLOR_PAIR(3)); waddstr(menubar,"(F3)"); wmove(menubar,0,31); wattroff(menubar,COLOR_PAIR(3)); waddstr(menubar,"Cursor "); wattron(menubar,COLOR_PAIR(3)); waddstr(menubar,"(F4)"); wmove(menubar,0,43); wattroff(menubar,COLOR_PAIR(3)); waddstr(menubar,"Compile"); wattron(menubar,COLOR_PAIR(3)); waddstr(menubar,"(F5)"); wattroff(menubar,COLOR_PAIR(3)); wmove(menubar,0,56); waddstr(menubar,"Help"); wattron(menubar,COLOR_PAIR(3)); waddstr(menubar,"(F6)"); wattroff(menubar,COLOR_PAIR(3)); wmove(menubar,0,66); waddstr(menubar,"Exit"); wattron(menubar,COLOR_PAIR(3)); waddstr(menubar,"(F7)"); } WINDOW draw_menu(int start_col) { int i; WINDOW items; items=(WINDOW )malloc(9sizeof(WINDOW )); items[0]=newwin(6,19,1,start_col); wbkgd(items[0],COLOR_PAIR(2)); // box(items[0],ACS_VLINE,ACS_HLINE); //wprintw(items[1],"new"); items[1]=subwin(items[0],1,17,2,start_col+1); items[2]=subwin(items[0],1,17,3,start_col+1); items[3]=subwin(items[0],1,17,4,start_col+1); items[4]=subwin(items[0],1,17,5,start_col+1); items[5]=subwin(items[0],1,17,6,start_col+1); items[6]=subwin(items[0],1,17,7,start_col+1); /// items[7]=subwin(items[0],1,17,8,start_col+1); // items[8]=subwin(items[0],1,17,9,start_col+1); /// for (i=1;i<9;i++) wprintw(items[1],"Load",i); wprintw(items[2],"New",i); wprintw(items[3],"Save"); wprintw(items[4],"Save as"); wprintw(items[5],"Printer"); /// wprintw(items[],"FILE%d",i); /// wprintw(item[1],"File%d",i); // wbkgd(items[1],COLOR_PAIR(1)); wrefresh(items[0]); return items; } WINDOW draw_menu2(int start_col) { int i; WINDOW items; items=(WINDOW) malloc(9sizeof(WINDOW)); items[0]=newwin(5,19,1,start_col); wbkgd(items[0],COLOR_PAIR(2)); items[1]=subwin(items[0],1,17,2,start_col+1); items[2]=subwin(items[0],1,17,3,start_col+1); items[3]=subwin(items[0],1,17,4,start_col+1); items[4]=subwin(items[0],1,17,5,start_col+1); items[5]=subwin(items[0],1,17,6,start_col+1); items[6]=subwin(items[0],1,17,7,start_col+1); wprintw(items[1],"Find"); wprintw(items[2],"Find and replace"); wprintw(items[3],"Repeat last find"); wprintw(items[4],"Goto line number"); wrefresh(items[0]); return items; } WINDOW draw_menu1(int start_col) { int i; WINDOW items; items=(WINDOW) malloc(9sizeof(WINDOW)); items[0]=newwin(6,19,1,start_col); wbkgd(items[0],COLOR_PAIR(2)); items[1]=subwin(items[0],1,17,2,start_col+1); items[2]=subwin(items[0],1,17,3,start_col+1); items[3]=subwin(items[0],1,17,4,start_col+1); items[4]=subwin(items[0],1,17,5,start_col+1); items[5]=subwin(items[0],1,17,6,start_col+1); items[6]=subwin(items[0],1,17,7,start_col+1); wprintw(items[1],"Undo"); wprintw(items[2],"Cut"); wprintw(items[3],"Copy"); wprintw(items[4],"Paste"); wprintw(items[5],"Delete"); wrefresh(items[0]); return items; } WINDOW draw_menu4(int start_col) { int i; WINDOW items; items=(WINDOW) malloc(9sizeof(WINDOW)); items[0]=newwin(5,19,1,start_col); wbkgd(items[0],COLOR_PAIR(2)); items[1]=subwin(items[0],1,17,2,start_col+1); items[2]=subwin(items[0],1,17,2,start_col+1); items[3]=subwin(items[0],1,17,4,start_col+1); items[4]=subwin(items[0],1,17,4,start_col+1); // items[5]=subwin(items[0],1,17,4,start_col+1); // items[6]=subwin(items[0],1,17,4,start_col+1); wprintw(items[2],"C Compiler"); wprintw(items[4],"C++ Compiler"); wrefresh(items[0]); return items; } WINDOW draw_menu5(int start_col) { int i; WINDOW items; items=(WINDOW) malloc(9sizeof(WINDOW)); items[0]=newwin(4,19,1,start_col); wbkgd(items[0],COLOR_PAIR(2)); items[1]=subwin(items[0],1,17,2,start_col+1); items[2]=subwin(items[0],1,17,2,start_col+1); items[3]=subwin(items[0],1,17,2,start_col+1); items[4]=subwin(items[0],1,17,4,start_col+1); // items[5]=subwin(items[0],1,17,4,start_col+1); // items[6]=subwin(items[0],1,17,4,start_col+1); wprintw(items[2],"Key words"); // wprintw(items[4]," perator"); wprintw(items[4],"Operator"); // wprintw(items[6],"Help"); wrefresh(items[0]); return items; } void delete_menu(WINDOW items,int count) { int i; for (i=0;i<count;i++) delwin(items[i]); free(items); } int scroll_menu(WINDOW items,int count,int menu_start_col) { int key; int selected=0; while (1) { key=getch(); if (key==KEY_DOWN \|\| key==KEY_UP) { wbkgd(items[selected+1],COLOR_PAIR(2)); wnoutrefresh(items[selected+1]); if (key==KEY_DOWN) { selected=(selected+1) % count; } else { selected=(selected+count-1) % count; } wbkgd(items[selected+1],COLOR_PAIR(1)); wnoutrefresh(items[selected+1]); doupdate(); } else if (key==KEY_LEFT \|\| key==KEY_RIGHT) { delete_menu(items,count+1); touchwin(stdscr); refresh(); items=draw_menu(60-menu_start_col); return scroll_menu(items,5,60-menu_start_col); } else if (key==ESCAPE) { return -1; } else if (key==ENTER) { return selected; } } } int main() { int key,t; WINDOW menubar,messagebar,window; init_curses(); bkgd(COLOR_PAIR(1)); window=subwin(stdscr,1,80,24,0); wbkgd(window,COLOR_PAIR(4)); menubar=subwin(stdscr,1,80,0,0); messagebar=subwin(stdscr,1,79,23,1); draw_menubar(menubar); move(2,1); printw("Press F1 or F2 to open the menus. "); printw("F9 quits."); /// window=newwin(2,68,23,8); /// wbkgd(window,COLOR_PAIR(4)); ///t=wgetch(window); refresh(); do { int selected_item; WINDOW **menu_items; key=getch(); werase(messagebar); wrefresh(messagebar); if (key==KEY_F(1)) { menu_items=draw_menu(0); selected_item=scroll_menu(menu_items,5,0); delete_menu(menu_items,9); if (selected_item<0) wprintw(messagebar, "You haven't selected any item."); else wprintw(messagebar, "You have selected menu item %d.",selected_item+1); touchwin(stdscr); refresh(); } else if (key==KEY_F(2)) { menu_items=draw_menu1(10); selected_item=scroll_menu(menu_items,5,10); delete_menu(menu_items,9); if (selected_item<0) wprintw(messagebar,"You haven't selected any item."); else wprintw(messagebar, "You have selected menu item %d.",selected_item+1); // touchwin(stdscr); /// window=newwin(2,68,23,12); ///wbkgd(window,COLOR_PAIR(4)); /// t=wgetch(window); touchwin(stdscr); refresh(); } else if(key==KEY_F(3)) { menu_items=draw_menu2(20); selected_item=scroll_menu(menu_items,5,20); delete_menu(menu_items,9); if(selected_item<0) wprintw(messagebar,"don't select any item"); else wprintw(messagebar, "You have select menu item %d",selected_item+1); touchwin(stdscr); refresh(); } else if(key==KEY_F(5)) { menu_items=draw_menu4(40); selected_item=scroll_menu(menu_items,5,40); delete_menu(menu_items,9); if(selected_item<0) wprintw(messagebar, "No item is selected"); else wprintw(messagebar, "You have selected menu %d",selected_item+1); touchwin(stdscr); refresh(); } else if(key==KEY_F(6)) { menu_items=draw_menu5(55); selected_item=scroll_menu(menu_items,5,55); delete_menu(menu_items,9); if(selected_item<0) wprintw(messagebar, " No item is selected"); else wprintw(messagebar, "You have selected menu %d",selected_item+1); touchwin(stdscr); refresh(); } else if(key==KEY_F(7)) { menu_items=draw_menu4(60); selected_item=scroll_menu(menu_items,5,60); delete_menu(menu_items,9); if(selected_item<0) wprintw(messagebar, "No item is selected"); else wprintw(messagebar, "You have to select menu %d",selected_item+1); touchwin(stdscr); refresh(); } } while (key!=KEY_F(9)); delwin(menubar); delwin(messagebar); delwin(window); endwin(); return 0; }

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