Class: RubyText::Window::Menu2D

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

Defined Under Namespace

Classes: Vertical

Instance Method Summary collapse

Constructor Details

#initialize(win:, r: :center, c: :center, items:, colrow: [0, 0], border: true, title: nil, fg: Green, bg: Black) ⇒ Menu2D

Returns a new instance of Menu2D.



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# File 'lib/menu.rb', line 24

def initialize(win:, r: :center, c: :center, items:, colrow: [0, 0], 
               border: true, title: nil, fg: Green, bg: Black)
  @win = win
  @list = []
  @header = @list.map {|x| x.header }
  items.each {|vlist| @list << Vertical.new(vlist) }
  @highest = @list.map {|x| x.height }.max
  @full_width = @list.inject(0) {|sum, vlist| sum += vlist.widest + 2 }
  @nlists = items.size
  @grid = Array.new(@nlists)  # column major order
  @grid.map! {|x| [" "] * @highest }
  @list.each.with_index do |vlist, i|  
    vlist.hash.each_pair.with_index do |kv, j|
      k, v = kv
      @grid[i][j] = [k, v]
    end
  end
  RubyText.hide_cursor
  @high = @highest
  @wide = @full_width
  @high += 2 if border
  @wide += 2 if border

  tlen = title.length + 8 rescue 0
  # wide = [wide, tlen].max
  row, col = @win.coords(r, c)
  row = row - @high/2 if r == :center
  col = col - @wide/2 if c == :center
  r, c = row, col
  @win.saveback(@high+1, @wide, r, c)
  mr, mc = r+@win.r0, c+@win.c0
  title = nil unless border

  @mwin = RubyText.window(@high+1, @wide, r: mr, c: mc, border: true,
                          fg: fg, bg: bg, title: title)
  @header.each {|head| printf "%-#{maxw}s", head }
  puts  # after header
  Curses.stdscr.keypad(true)
  maxcol = items.size - 1
  sizes = items.map {|x| x.size }
  max = sizes.max
  # mwin.go(r, c)
  r += 1   # account for header
  @selc, @selr = colrow
end

Instance Method Details

#handle(r, c) ⇒ Object 



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# File 'lib/menu.rb', line 84

def handle(r, c)
  loop do
    show(r, c)
    ch = getch
    case ch
      when RubyText::Window::Up
        @selr -= 1 if @selr > 0
      when RubyText::Window::Down
#             puts "PAUSE r,c = #@selr #@selc  highest=#@highest"; getch
        @selr += 1 if @selr < @highest - 1
      when RubyText::Window::Left
        @selc -= 1 if @selc > 0
      when RubyText::Window::Right
        @selc += 1 if @selc < @full_width
      when RubyText::Window::Esc
        @win.restback(@high+1, @wide, r-1, c)
        RubyText.show_cursor
        return [nil, nil, nil]
      when RubyText::Window::Enter
        @win.restback(@high+1, @wide, r-1, c)
        RubyText.show_cursor
        choice = @grid[@selc][@selr][1]
        case choice
          when String;   
               puts "Returning #{[@selc, @selr, choice].inspect}"; getch
               return [@selc, @selr, choice]
          when NilClass; return [nil, nil, nil]
        end
        result = choice.call   # should be a Proc
        return [nil, nil, nil] if result.nil? || result.empty?
        return result
      else Curses.beep
    end
  end
  RubyText.show_cursor
end

#show(r, c, colrow: [0, 0]) ⇒ Object 



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# File 'lib/menu.rb', line 70

def show(r, c, colrow: [0, 0])
  @selc, @selr = colrow
  @grid.each.with_index do |column, cix|
    column.each.with_index do |pairs, rix|   # {Jan: ..., Feb: ..., Mar: ..., ...}
      # STDSCR.puts "go: #{r}+#{rix}, #{c}+#{cix}*#{maxw}"
      @mwin.go(rix, cix)  # FIXME wrong?
      style = ([@selc, @selr] == [cix, rix]) ? :reverse : :normal
      key, val = pairs
      label = key.to_s
      @mwin.print label # fx(label, style)
    end
  end
end