Class: PREP::Core::Loop

Inherits:
Drawable show all
Defined in:
lib/core/loop.rb

Overview

ループ読み込みクラスの定義

Constant Summary collapse

DIRECTIONS = 
{
  :horizontal => 'horizontal',
  :vertical => 'vertical'
}
@@default_values = 
{
  :direction => DIRECTIONS[:vertical],
  :gap => 0,
  :page_break => false,
  :layer => 4,
}

Instance Attribute Summary collapse

Attributes inherited from Drawable

#identifier, #layer

Instance Method Summary collapse

Methods inherited from Drawable

#<=>, #calculate_pos, #key_string_to_symbol, #rewind_current_page

Constructor Details

#initialize(identifier, values = { }) ⇒ Loop

Returns a new instance of Loop.



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# File 'lib/core/loop.rb', line 27

def initialize(identifier, values = { })
  values = @@default_values.merge(key_string_to_symbol(values))

  super(identifier, values[:layer])

  self.direction = values[:direction]
  @header_group = values[:header]
  @iterator_group = values[:iterator]
  @gap = values[:gap].mm2pixcel
  @footer_group = values[:footer]
  @point = Point.new(values[:x].mm2pixcel, values[:y].mm2pixcel)
  @page_break = values[:page_break]
end

Instance Attribute Details

#direction ⇒ Object

Returns the value of attribute direction.



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# File 'lib/core/loop.rb', line 25

def direction
  @direction
end

#footer_group ⇒ Object (readonly)

Returns the value of attribute footer_group.



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# File 'lib/core/loop.rb', line 25

def footer_group
  @footer_group
end

#gap ⇒ Object (readonly)

Returns the value of attribute gap.



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# File 'lib/core/loop.rb', line 25

def gap
  @gap
end

#header_group ⇒ Object (readonly)

Returns the value of attribute header_group.



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# File 'lib/core/loop.rb', line 25

def header_group
  @header_group
end

#height ⇒ Object (readonly)

Returns the value of attribute height.



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# File 'lib/core/loop.rb', line 25

def height
  @height
end

#iterator_group ⇒ Object (readonly)

Returns the value of attribute iterator_group.



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# File 'lib/core/loop.rb', line 25

def iterator_group
  @iterator_group
end

#page_break ⇒ Object (readonly)

Returns the value of attribute page_break.



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# File 'lib/core/loop.rb', line 25

def page_break
  @page_break
end

#point ⇒ Object (readonly)

Returns the value of attribute point.



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# File 'lib/core/loop.rb', line 25

def point
  @point
end

#width ⇒ Object (readonly)

Returns the value of attribute width.



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# File 'lib/core/loop.rb', line 25

def width
  @width
end

Instance Method Details

#calculate_region(prep, region, values, stop_on_drawable = nil) ⇒ Object

データに依存してサイズが変化する可能性がある



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# File 'lib/core/loop.rb', line 68

def calculate_region(prep, region, values, stop_on_drawable = nil)
  if self === stop_on_drawable
    puts "STOPPING on #{stop_on_drawable.identifier}" if ENV["DEBUG"]
    gets if ENV["DEBUG"]
    raise ReRenderJump.new(region)
  end
  puts "Calculate region for #{self.class}: #{self.identifier} region: #{region}" if ENV["DEBUG"]
  # リージョン補正
  current_region = fit_region(region)
  # 描画計算の初期位置を保持
  @initial_calculate_region = current_region.dup

  # ヘッダの領域サイズを計算
  current_region = calculate_header_region(prep, current_region, values, stop_on_drawable)
  puts "Header:\t#{current_region}" if ENV["DEBUG"]

  # 繰り返し部分の領域サイズを計算
  current_region = calculate_iterator_region(prep, current_region, values, stop_on_drawable)
  puts "Iterator:\t#{current_region}" if ENV["DEBUG"]

  # フッタの領域サイズを計算
  current_region = calculate_footer_region(prep, current_region, values, stop_on_drawable)
  puts "Footer:\t#{current_region}" if ENV["DEBUG"]

  begin
    # 最終的にリージョン補正位置から必要な領域を計算
    # 元のリージョン範囲から最終的に残っているリージョン範囲を減算すればよい
    ret_region = Region.new(0, 0,
                            region.width - current_region.width,
                            region.height - current_region.height)

    # 進行方向じゃない方向に対しての差分は別途取得
    if @direction == DIRECTIONS[:horizontal]
      ret_region.height = @height
    else # if @direction == DIRECTIONS[:vertical]
      ret_region.width = @width
    end

    return ret_region.width, ret_region.height
  rescue RegionWidthOverflowError, RegionHeightOverflowError => e
    # これは負の数を返却してやれば上位では単純な加算しか起きない
    w, h = region.width - current_region.width, region.height - current_region.height
    if @direction == DIRECTIONS[:horizontal]
      h = @height
    else # if @direction == DIRECTIONS[:vertical]
      w = @width
    end

    puts "Inner page break!! width: #{w}, height: #{h}" if ENV["DEBUG"]
    gets if ENV["DEBUG"]

    return w, h
  end
end

#draw(prep, region, values, stop_on_drawable = nil) ⇒ Object

実際の描画を実施



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# File 'lib/core/loop.rb', line 137

def draw(prep, region, values, stop_on_drawable = nil)
  if self === stop_on_drawable
    puts "STOPPING on #{stop_on_drawable.identifier}" if ENV["DEBUG"]
    gets if ENV["DEBUG"]
    raise ReRenderJump.new(region)
  end
  STDERR.puts("Draw on #{self.class} #{self.identifier}") if ENV['DEBUG']
  # リージョン補正
  current_region = fit_region(region)
  # 描画計算の初期位置を保持
  @initial_draw_region = current_region.dup

  # 領域に関する情報を取得
  expand_setting = { }
  if !@page_break
    # 描画に先立ち領域拡張設定を実施
    # ループ要素の描画領域を算出（事前計算）
    rewind_current_page(prep) do
      calculate_region(prep, region.dup, values)
    end
    if @direction == DIRECTIONS[:horizontal]
      expand_setting[:height] = @height
    else # if @direction == DIRECTIONS[:vertical]
      expand_setting[:width] = @width
    end
  end
  # ヘッダおよびフッタの子に関してワンタイム設定を実施
  unless @header_group.nil?
    header = prep.group(@header_group)
    header.drawable_items.each do |drawable|
      if Label === drawable || Rectangle === drawable
        if drawable.expand
          drawable.expand_region(expand_setting)
        end
      end
    end
  end
  unless @footer_group.nil?
    footer = prep.group(@footer_group)
    footer.drawable_items.each do |drawable|
      if Label === drawable || Rectangle === drawable
        if drawable.expand
          drawable.expand_region(expand_setting)
        end
      end
    end
  end
  # ヘッダブロック描画
  current_region = draw_header(prep, current_region, values, stop_on_drawable)

  # 繰り返しブロック描画
  current_region = draw_iterator(prep, current_region, values, stop_on_drawable)

  # フッタブロック描画
  current_region = draw_footer(prep, current_region, values, stop_on_drawable)
end

#fit_region(region) ⇒ Object

リージョン補正

相対位置情報を元にリージョンを補正して返却



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# File 'lib/core/loop.rb', line 126

def fit_region(region)
  current_region = region.dup
  current_region.x += point.x
  current_region.y += point.y
  current_region.width -= point.x
  current_region.height -= point.y

  return current_region
end

#generate_sample_dataset(prep) ⇒ Object

データセット雛形を生成



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# File 'lib/core/loop.rb', line 50

def generate_sample_dataset(prep)
  dataset = { }

  unless @header_group.nil?
    header = prep.group(@header_group)
    dataset[:header] = header.generate_sample_dataset(prep)
  end
  iterator = prep.group(@iterator_group)
  dataset[:values] = [iterator.generate_sample_dataset(prep)]
  unless @footer_group.nil?
    footer = prep.group(@footer_group)
    dataset[:footer] = footer.generate_sample_dataset(prep)
  end

  return dataset
end