centerscroll.rb

# 変数[n]の値が 1 なら中央、2 なら左、それ以外なら左
Window_ScrollText::VID_SCROLL_ALIGN = 1

class Window_ScrollText < Window_Base
  #--------------------------------------------------------------------------
  # ● 制御文字つきテキストの描画
  #--------------------------------------------------------------------------
  def draw_text_ex(x, y, text)
    reset_font_settings
    text = convert_escape_characters(text)
    pos = {:x => x, :y => y, :new_x => x}
    text.lines do |line|
      case $game_variables[VID_SCROLL_ALIGN]
      when 1
        pos[:x] = (contents_width - calc_line_width(line)) / 2
      when 2
        pos[:x] = (contents_width - calc_line_width(line)) - x
      end
      pos[:height] = calc_line_height(line)
      process_character(line.slice!(0, 1), line, pos) until line.empty?
    end
  end
  #--------------------------------------------------------------------------
  # ● 行の幅を計算
  #     restore_font_size : 計算後にフォントサイズを元に戻す
  #--------------------------------------------------------------------------
  def calc_line_width(text, restore_font_size = true)
    result = 0
    last_font_size = contents.font.size
    text = text.clone
    until text.empty?
      c = text.slice!(0, 1)
      case c
      when "\n"   # 改行
        break
      when "\e"   # 制御文字
        case obtain_escape_code(text).upcase
        when 'C'
          obtain_escape_param(text)
        when 'I'
          obtain_escape_param(text)
          result += 24
        when '{'
          make_font_bigger
        when '}'
          make_font_smaller
        end
      else        # 普通の文字
        result += text_size(c).width
      end
    end
    contents.font.size = last_font_size if restore_font_size
    return result
  end
end