RGSS Menu Class

Menu.rb

#===============================================================================
# Game's Menu
#-------------------------------------------------------------------------------
=begin
License - MIT
Copyright (c) 2014 Marcelo Amancio de Lima Santos (maxhero)
 
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
 
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
 
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
=end
#===============================================================================
class Menu
  attr_accessor :option_list,
  				:callbacks,
  				:x,
  				:y,
  				:index
  #-----------------------------------------------------------------------------
  # initialize method
  #-----------------------------------------------------------------------------
  def initialize(options,callbacks,x = 0,y = 0,index = 0)
    @index       = index
    @x           = x
    @y           = y
    @back_signal = false
    @option_list = options
    @callbacks   = callbacks
    start
  end
  def start
    create_objects
    create_cursor
    hide
    setup_options
    setup_cursor
    draw_options
    update_pos
    update_cursor
    display
  end
  #-----------------------------------------------------------------------------
  # create methods
  #-----------------------------------------------------------------------------
  def create_objects
    @options         = Sprite.new
  end
  def create_cursor
    @cursor         = Sprite.new
    @cx             = 0
    @cursor.zoom_x  = 0.5
    @cursor.zoom_y  = 0.5
  end
  #-----------------------------------------------------------------------------
  # calc methods
  #-----------------------------------------------------------------------------
  def calc_word_x(id)
    id_word_width      = text_size(@option_list[id]).width
    biggest_word_width = text_size(@largest_word).width
    return (biggest_word_width-id_word_width)/2
  end
  #-----------------------------------------------------------------------------
  # set methods
  #-----------------------------------------------------------------------------
=begin
  def set_position(array)
    @x = array[0]
    @y = array[1]
  end
=end
  #-----------------------------------------------------------------------------
  # setup methods
  #-----------------------------------------------------------------------------
  def setup_options
    @largest_word    = @option_list.max_by{|i| i.size}
    width            = text_size(@largest_word).width
    height           = text_size(@largest_word).height*@option_list.size
    @options.bitmap  = Bitmap.new(width,height)
    @option_x = []
    @option_y = []
    for i in 0...@option_list.size
      @option_x[i] = calc_word_x(i)
      @option_y[i] = @options.y+(20*i)
    end
  end
  def setup_cursor
    @cursor.bitmap  = Cache.title3("cursor")
    @cur_posx       = []
    @cur_posy       = []
    for i in 0...@option_list.size
      @cur_posx[i] = (@option_x[i])-40
      @cur_posy[i] = (@option_y[i])+5
    end
  end
  #-----------------------------------------------------------------------------
  # draw methods
  #-----------------------------------------------------------------------------
  def draw_options
    for i in 0...@option_list.size
      @options.bitmap.mh_draw_text(@option_x[i],@option_y[i],@option_list[i])
    end
  end
  #-----------------------------------------------------------------------------
  # update methods
  #-----------------------------------------------------------------------------
  def update
    update_input
    update_cursor
    update_pos
  end
  def update_input
    if Input.trigger?(:C)
      return run_callback(@index)
    elsif Input.trigger?(:B)
      Sound.play_cancel
      return send_back_signal
    end
    if Input.trigger?(:UP)
      Sound.play_cursor
      @index = (@index-1) % @option_list.size
    elsif Input.trigger?(:DOWN)
      Sound.play_cursor
      @index = (@index+1) % @option_list.size
    end
  end
  def update_pos
    @options.x      = @x
    @options.y      = @y
  end
  def update_cursor
    @cx = (@cx-1)%(12*2)
    @cursor.x = @x+@cur_posx[@index] + (((@cx-12).abs)/1.5)
    @cursor.y = @y+@cur_posy[@index]
  end
  #-----------------------------------------------------------------------------
  # 
  #-----------------------------------------------------------------------------
  def send_back_signal
    @back_signal = true
  end
  def width
    return @options.width
  end
  def height
    return @options.height
  end
  def back_signal?
    return @back_signal
  end
  def run_callback(id)
    Graphics.update
    Input.update
    @callbacks[id].call
  end
  def display
    @options.visible = true
    @cursor.visible  = true
  end
  def hide
    @options.visible = false
    @cursor.visible  = false
  end
  def dispose
    @cursor.dispose
    @options.dispose
  end
end