The ncurses (new curses) library is a free software emulation of curses in System V Release 4.0 (SVr4), and more. It uses terminfo format, supports pads and color and multiple highlights and forms characters and function-key mapping, and has all the other SVr4-curses enhancements over BSD curses. NCURSES is a clone of the original System V Release 4.0 (SVr4) curses. It is a freely distributable library, fully compatible with older version of curses. In short, it is a library of functions that manages an application's display on character-cell terminals. In the remainder of the document, the terms curses and ncurses are used interchangeably. I'd like to compile SIPp in my laptop. I have installed all the packets that they required including ncurses and ncurses-devel.SIPp. But when I execute./configure -with-sctp -with-pcap -with-openssl, it mentioned that 'configure: error: ncurses library missing'. What should I do to solve this problem. Curses.ncursesversion¶ A named tuple containing the three components of the ncurses library version: major, minor, and patch. All values are integers. The components can also be accessed by name, so curses.ncursesversion0 is equivalent to curses.ncursesversion.major and so on. Availability: if the ncurses library is used. Since there is no conio.h on linux, I researched and found that ncurses.h could do the trick. Now the only problem is that I do not know how to download it and then add the library. Can someone please describe the method? Also, if anybody can describe whether ncurses.h is a better option than curses.h or if I am completely wrong in using curses.h?
Almost all the programmers or every Computer science student in the wild would have practiced C programming, some might have just memorized few programs for the sake of exams. But still, those who really gained the knowledge to write C programs would have missed out all the interesting concepts of C, and Curses is one of them, available on all Linux and Unix variants. You can run Curses with Cygwin for Windows. Now after years of development and with new features added it is called as Ncurses ( New Curses ). Developed in early 1980 to manage application’s display on character-cell terminals.
Programming with NCurses will be lot more interesting because of the formatted output, but it is lot more than that. It aims at providing a library of advanced functions that can be used to develop wonderful applications with “GUI like” interface with C. You can control every input including keyboard and mouse, as well as the output.
Ncurses Library On Ubuntu
Creating menu with Ncurses in C.
Though Ncurses has a special include directive “menu.h” for creating beautiful and flexible menus, in this article I am not going to use it, we will create a menu with basic Ncurses functions. But before going into the program we will see how Ncurses handles the rows and columns of the terminal screen.
The above image shows how curses library maps the screen into rows and columns. ( As always programmers count form zero. ). With this basic understanding let’s go into the code.
Ncurses Library Ubuntu
Simple menu Programs with NCURSES
The above sample code will draw a box with menu items printed and the first menu item highlighted. And will wait for the user input, upon pressing the up and down arrow keys you can navigate the menu. Here is the code break-down and instruction on how to run a C program with Ncurses library.
First we should include the ncurses.h header to use the Ncurses functions – #include <ncurses.h>, then within the program we should start with initscr() function which initializes NCurses. Many say that it clears the terminal screen, but it actually sets up the internal memory structures and input/output interfaces between the NCurses functions and your computer’s terminal.
Then we create a new window, with the newwin() function. This function has to be given four co-ordinates which is rows, cols, y_orgin, and x_orgin respectively.
Then the call to box() function defines a window border clearly, so that you can have make it standout on your terminal screen, also know that, this just draws border, which is prone to overwriting and accidental erasing.
After creating the window we print all the menu items one below the other and highlight the first item. For high-lighting the text we use wattron() function, with A_STANDOUT attribute, few more high-lighting modes are available for which you can refer the Ncurses manual page.
Then we disable echo and enable keypad to capture the special keys and navigate the menu. We are also using sprintf to right pad the string with spaces to display them with even width.
Compiling and linking Ncurses programs
You should compile Ncurses programs by linking it to Ncurses library like this.
gcc program.c -lncurses
The above program will give you the following output, You can also expand it to the most advanced menu or bar menu or as you wish. Happy coding!!
Ncurses Library Is Not Usable
Creating Menu with Curses Menu Library in C