Top Level Namespace

Instance Method Summary

• #getchr ⇒ Object

  GENERAL FUNCTIONS.

• #main_getkey ⇒ Object

  GET KEY FROM USER.

• #w_b(info) ⇒ Object

  BOTTOM WINDOW FUNCTIONS.

• #w_b_getstr(pretext, text) ⇒ Object

  A SIMPLE READLINE-LIKE ROUTINE.

• #w_r_info(info) ⇒ Object

  RIGHT WINDOW FUNCTIONS.

Instance Method Details

#getchr ⇒ Object

GENERAL FUNCTIONS

# File 'lib/curses-template.rb', line 167

def getchr # Process key presses
  c = STDIN.getch
  #c = STDIN.getch(min: 0, time: 1) # Use this if you need to poll for user keys
  case c
  when "\e"    # ANSI escape sequences
    case STDIN.getc
    when '['   # CSI
      case STDIN.getc
      when 'A' then chr = "UP"
      when 'B' then chr = "DOWN"
      when 'C' then chr = "RIGHT"
      when 'D' then chr = "LEFT"
      when 'Z' then chr = "S-TAB"
      when '2' then chr = "INS"    ; chr = "C-INS"    if STDIN.getc == "^"
      when '3' then chr = "DEL"    ; chr = "C-DEL"    if STDIN.getc == "^"
      when '5' then chr = "PgUP"   ; chr = "C-PgUP"   if STDIN.getc == "^"
      when '6' then chr = "PgDOWN" ; chr = "C-PgDOWN" if STDIN.getc == "^"
      when '7' then chr = "HOME"   ; chr = "C-HOME"   if STDIN.getc == "^"
      when '8' then chr = "END"    ; chr = "C-END"    if STDIN.getc == "^"
      end
    when 'O'   # Set Ctrl+ArrowKey equal to ArrowKey; May be used for other purposes in the future
      case STDIN.getc
      when 'a' then chr = "C-UP"
      when 'b' then chr = "C-DOWN"
      when 'c' then chr = "C-RIGHT"
      when 'd' then chr = "C-LEFT"
      end
    end
  when "", "" then chr = "BACK"
  when "" then chr = "C-C"
  when "" then chr = "C-D"
  when "" then chr = "C-E"
  when "" then chr = "C-G"
  when "" then chr = "C-K"
  when "" then chr = "C-L"
  when "" then chr = "C-N"
  when "" then chr = "C-O"
  when "" then chr = "C-P"
  when "" then chr = "C-T"
  when "" then chr = "C-Y"
  when "" then chr = "WBACK"
  when "" then chr = "LDEL"
  when "\r" then chr = "ENTER"
  when "\t" then chr = "TAB"
  when /[[:print:]]/  then chr = c
  end
  return chr
end

#main_getkey ⇒ Object

GET KEY FROM USER

# File 'lib/curses-template.rb', line 215

def main_getkey # GET KEY FROM USER
  chr = getchr
  case chr
  when '?' # Show helptext in right window - add code to show help text here
    @w_t.p0(255,27,"Try pressing 'w'")
    @w_t.update = false
  # Examples of moving up and down in a window
  # You must set @min_index and @max_index in the main loop of the program 
  when 'UP' 
    @w_l.index = @w_l.index <= @min_index ? @max_index : @w_l.index - 1
  when 'DOWN'
    @w_l.index = @w_l.index >= @max_index ? @min_index : @w_l.index + 1
  when 'PgUP'
    @w_l.index -= @w_l.maxy - 2
    @w_l.index = @min_index if @w_l.index < @min_index
  when 'PgDOWN'
    @w_l.index += @w_l.maxy - 2
    @w_l.index = @max_index if @w_l.index > @max_index
  when 'HOME'
    @w_l.index = @min_index
  when 'END'
    @w_l.index = @max_index
  when 'w' # Shows how you can add a window and get input from there and then close the window
    maxx = Curses.cols
    maxy = Curses.lines
    # Curses::Window.new     (     h,      w,        y,         x)
    @w_w = Curses::Window.new(     6,     20, maxy/2-3, maxx/2-10)
    @w_w.fg, @w_w.bg, @w_w.attr = 255, 233, Curses::A_BOLD
    @w_w.frame
    @w_w.setpos(4, 7) 
    @w_w.p(255,130," y/n? ")
    chrw = getchr
    case chrw
    when 'y'
      @w_w.setpos(4, 7) 
      @w_w.p(255,22," YES! ")
    when 'n'
      @w_w.setpos(4, 7) 
      @w_w.p(255,52," NO!! ")
    end
    chrw = getchr
    @w_l.fill; @w_r.fill # Fill the underlying windows to remove the overlaying window
    @w_w.close # Remove the overlying window from memory
  when 'a'
    # ...etc
  when 'r'
    @break = true
  when 'q' # Exit 
    exit 0
  when '@' # Enter "Ruby debug"
    cmd = w_b_getstr("◆ ", "")
    @w_b.update = true
    @w_r.fill
    info = "Command: #{cmd}\n\n"
    begin
      info += eval(cmd).to_s
    rescue Exception => err
      info += "Error: #{err.inspect}"
    end
    w_r_info(info)
    @w_r.update = false
    cmd = w_b_getstr("◆ ", "")
    begin
      @w_r.fill
      @w_r.p(eval(cmd))
    rescue StandardError => e
      w_b("Error: #{e.inspect}")
      chr = STDIN.getc
    end
  end
  while STDIN.ready?
    chr = STDIN.getc
  end
end

#w_b(info) ⇒ Object

BOTTOM WINDOW FUNCTIONS

# File 'lib/curses-template.rb', line 293

def w_b(info) # SHOW INFO IN @W_B
  @w_b.fill
  info      = "Choose window: i=IMDB list (+/- to add/remove from my? list), g=Genres (+/- to add/remove), m=my? list. " if info == nil
  info      = info[1..(@w_b.mx? - 3)] + "…" if info.length + 3 > @w_b.mx? 
  info     += " " * (@w_b.mx? - info.length) if info.length < @w_b.mx?
  @w_b.p(info)
  @w_b.nl
  @w_b.update = false
end

#w_b_getstr(pretext, text) ⇒ Object

A SIMPLE READLINE-LIKE ROUTINE

# File 'lib/curses-template.rb', line 302

def w_b_getstr(pretext, text) # A SIMPLE READLINE-LIKE ROUTINE
  Curses.curs_set(1)
  Curses.echo
  stk = 0
  pos = text.length
  chr = ""
  while chr != "ENTER"
    @w_b.xy(0,0)
    @w_b.p(pretext + text)
    @w_b.nl
    @w_b.xy(pretext.length + pos,0)
    @w_b.refresh
    chr = getchr
    case chr
    when 'C-C', 'C-G'
      return ""
    when 'RIGHT'
      pos += 1 unless pos > text.length
    when 'LEFT'
      pos -= 1 unless pos == 0
    when 'HOME'
      pos = 0
    when 'END'
      pos = text.length
    when 'DEL'
      text[pos] = ""
    when 'BACK'
      unless pos == 0
        pos -= 1
        text[pos] = ""
      end
    when 'LDEL'
      text = ""
      pos = 0
    when /^.$/
      text.insert(pos,chr)
      pos += 1
    end
  end
  Curses.curs_set(1); Curses.curs_set(0) 
  #Curses.noecho
  return text
end

#w_r_info(info) ⇒ Object

RIGHT WINDOW FUNCTIONS

# File 'lib/curses-template.rb', line 349

def w_r_info(info) # SHOW INFO IN THE RIGHT WINDOW
  begin
    @w_r.clr
    @w_r.refresh
    @w_r.p(info)
    @w_r.update = false
  rescue
  end
end