Class: Umbra::Menu

Inherits:
Object
  • Object
show all
Defined in:
lib/umbra/menu.rb

Instance Method Summary collapse

Constructor Details

#initialize(title, hash, config = {}) ⇒ Menu

Returns a new instance of Menu.



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# File 'lib/umbra/menu.rb', line 29

def initialize title, hash, config={}

  @list = hash.values
  @keys = hash.keys.collect { |x| x.to_s }
  @hash = hash
  bkgd = config[:bkgd] || FFI::NCurses.COLOR_PAIR(14) | BOLD
  @attr = BOLD
  @color_pair = config[:color_pair] || 14
  ht = @list.size+2
  wid = config[:width] || 40
  top = (FFI::NCurses.LINES - ht)/2
  left = (FFI::NCurses.COLS - wid)/2
  @window = Window.new(ht, wid, top, left)
  @window.wbkgd(bkgd)
  @window.box
  @window.title(title)
  @current = 0
  print_items @hash
end

Instance Method Details

#getkey ⇒ Object 



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# File 'lib/umbra/menu.rb', line 58

def getkey
  ch = 0
  char = nil
  begin
    while (ch = @window.getkey) != FFI::NCurses::KEY_CTRL_C
      break if ch == 27 # ESC
      tmpchar = FFI::NCurses.keyname(ch) rescue '?'
      if @keys.include? tmpchar
        $log.debug "  menu #{tmpchar.class}:#{tmpchar} "
        char = ch.chr
        $log.debug "  menu #{ch.class}:#{char} "
        #char = tmpchar
        break
      end
      case ch
      when FFI::NCurses::KEY_DOWN
        @current += 1
      when FFI::NCurses::KEY_UP
        @current -= 1
      when FFI::NCurses::KEY_RETURN
        char = @keys[@current]
        break
      end
      @current = 0 if @current < 0
      @current = @list.size-1 if @current >= @list.size
      print_items @hash

      # trap arrow keys here
    end
  ensure
    @window.destroy
  end
  return char
end

#print_items(hash) ⇒ Object 



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# File 'lib/umbra/menu.rb', line 48

def print_items hash
  ix = 0
  hash.each_pair {|k, val|
    attr = @attr
    attr = REVERSE if ix == @current
    @window.printstring(ix+1 , 2, "#{k}    #{val}", @color_pair, attr )
    ix += 1
  }
  @window.refresh
end