1.
Curses
Hamamatsu.rb #61
Langur(@osarusystem)
Wed Feb 10 2016

2.
About Me

3.
CC-BY-SA 3.0 from Wikipedia
Name : Langur
Twitter : @osarusystem
Jobs : Embedded Software Engineer
Network Software Engineer
Interestedness : OS/Cipher/FreeBSD/Ruby/
Primates/Making Sweets/
...etc

4.
Curses

5.
Curses
Curses : A terminal control library
Developer : Ken Arnold
Reference : vi
Used : Rouge/Tin/Jack ... etc
Provide : Interface on CLI like GUI
Not all based applications
employ like this
Support : Linux/BSD/Windows ... etc

6.
Ruby curses

7.
Ruby curses
def support?(version)
if (version < 2.1)
p “standard library”
else
p “gem library”
end
end

8.
How to use
require “curses”
Curses.init_screen
begin
s = “Hello World!”
Curses.setpos(1, 1)
Curses.addstr(s)
Curses.refresh
Curses.getch
ensure
Cursese.close_screen
end
1. 初期化処理
2. Cursesの設定
(省略可)
3. windowの操作
4. 入力待ち
(省略可)
5. 終了処理

9.
How to use
require “curses”
Curses.init_screen
begin
s = “Hello World!”
Curses.setpos(1, 1)
Curses.addstr(s)
Curses.refresh
Curses.getch
ensure
Cursese.close_screen
end
1. 初期化処理
2. Cursesの設定
(省略可)
3. windowの操作
4. 入力待ち
(省略可)
5. 終了処理

10.
How to use
require “curses”
Curses.init_screen
begin
s = “Hello World!”
Curses.setpos(1, 1)
Curses.addstr(s)
Curses.refresh
Curses.getch
ensure
Cursese.close_screen
end
1. 初期化処理
2. Cursesの設定
(省略可)
3. windowの操作
4. 入力待ち
(省略可)
5. 終了処理

11.
How to use
require “curses”
Curses.init_screen
begin
s = “Hello World!”
Curses.setpos(1, 1)
Curses.addstr(s)
Curses.refresh
Curses.getch
ensure
Cursese.close_screen
end
1. 初期化処理
2. Cursesの設定
(省略可)
3. windowの操作
4. 入力待ち
(省略可)
5. 終了処理

12.
How to use
require “curses”
Curses.init_screen
begin
s = “Hello World!”
Curses.setpos(1, 1)
Curses.addstr(s)
Curses.refresh
Curses.getch
ensure
Cursese.close_screen
end
1. 初期化処理
2. Cursesの設定
(省略可)
3. windowの操作
4. 入力待ち
(省略可)
5. 終了処理

13.
Uncool

14.
Delete ‘Curses.’
require “curses”
Curses.init_screen
begin
s = “Hello World!”
Curses.setpos(1, 1)
Curses.addstr(s)
Curses.refresh
Curses.getch
ensure
Curses.close_screen
end
require “curses”
include Curses
init_screen
begin
s = “Hello World!”
setpos(1, 1)
addstr(s)
refresh
getch
ensure
close_screen
end

15.
Execute

16.
Execute

17.
Execute

18.
Window

19.
Window
stdscr
sub2
sub1
‘init_screan’ create ‘stdscr’.
‘stdscr’ is root window.
‘stdscr’ can create ‘sub window’.

20.
Create sub window
begin
s = “stdscr”;ss = “subwindow”
setpos(10, 10);addstr(s)
sub = stdscr.subwin(3, 12, 1, 1)
sub.box(?|, ?-, ?+)
sub.setpos(1, 1);sub.addstr(ss)
sub.refresh
refresh
getch
ensure
sub.close_screen
close_screen
end

21.
Execute

22.
Execute

23.
Next step

24.
Next step
• I want to create text editor.
• Help me!
• How to use Git-Hub
• Ruby’s manner
• GTK or Qt

25.
Thank you.