axlsx報表工具(四)——條件格式化

定義格式化操作

       條件格式化風格定義也是使用格式化定義語句add_style，不同的是必須將type指定爲:dxf。

# define the style for conditional formatting
profitable = book.styles.add_style( :fg_color => "FF428751", :type => :dxf )
unprofitable = book.styles.add_style( :fg_color => "FF0000", :type => :dxf )

      條件格式化有四種類型cellIs，colorScale，dataBar，iconSet。

cellIs

      cellIs條件格式化使用得較爲普遍，即對滿足條件的單元格更改字體顏色，字體大小，背景色等等。

       對於B列，如果數值大於100000表示盈利，則更改字體顏色；對於虧損的，則在C列中將百分比小於100%的赤字顯示。

book.add_worksheet(:name => "Cell Is") do |ws|

  # 產生20行數據
  ws.add_row ["Previous Year Quarterly Profits (JPY)"]
  ws.add_row ["Quarter", "Profit", "% of Total"]
  offset = 3
  rows = 20
  offset.upto(rows + offset) do |i|
    ws.add_row ["Q#{i}", 10000*((rows/2-i) * (rows/2-i)), "=100*B#{i}/SUM(B3:B#{rows+offset})"], :style=>[nil, money, percent]
  end

# 格式化條件>100000
  ws.add_conditional_formatting("B3:B100", { :type => :cellIs, :operator => :greaterThan, :formula => "100000", :dxfId => profitable, :priority => 1 })
# 格式化條件0.00%<x<100%
  ws.add_conditional_formatting("C3:C100", { :type => :cellIs, :operator => :between, :formula => ["0.00%","100.00%"], :dxfId => unprofitable, :priority => 1 })
end

        add_conditional_formatting方法指定條件格式化，類型type是cellIs，條件由operator和formula共同指定，dxfId就是我們上面定義的格式化操作，priority優先級數值越小，優先級越高。

colorScale

     colorScale是以顏色漸變的方式來格式化表格。

book.add_worksheet(:name => "Color Scale") do |ws|
  ws.add_row ["Previous Year Quarterly Profits (JPY)"]
  ws.add_row ["Quarter", "Profit", "% of Total"]
  offset = 3
  rows = 20
  offset.upto(rows + offset) do |i|
    ws.add_row ["Q#{i}", 10000*((rows/2-i) * (rows/2-i)), "=100*B#{i}/SUM(B3:B#{rows+offset})"], :style=>[nil, money, percent]
  end

  color_scale = Axlsx::ColorScale.new
  ws.add_conditional_formatting("B3:B100", { :type => :colorScale, :operator => :greaterThan, :formula => "100000", :dxfId => profitable, :priority => 1, :color_scale => color_scale })
end

       大於100000的單元格顏色越來越深，而小於的單元格越來越淺。

dataBar

     dataBar格式化能夠在單元格中同時顯示數值和一個柱形圖，非常直觀漂亮。

book.add_worksheet(:name => "Data Bar") do |ws|
  ws.add_row ["Previous Year Quarterly Profits (JPY)"]
  ws.add_row ["Quarter", "Profit", "% of Total"]
  offset = 3
  rows = 20
  offset.upto(rows + offset) do |i|
    ws.add_row ["Q#{i}", 10000*((rows/2-i) * (rows/2-i)), "=100*B#{i}/SUM(B3:B#{rows+offset})"], :style=>[nil, money, percent]
  end

  data_bar = Axlsx::DataBar.new
  ws.add_conditional_formatting("B3:B100", { :type => :dataBar, :dxfId => profitable, :priority => 1, :data_bar => data_bar })
end

iconSet

    iconSet方式是對於滿足條件和不滿足條件的單元格分別使用不同的圖標。

book.add_worksheet(:name => "Icon Set") do |ws|
  ws.add_row ["Previous Year Quarterly Profits (JPY)"]
  ws.add_row ["Quarter", "Profit", "% of Total"]
  offset = 3
  rows = 20
  offset.upto(rows + offset) do |i|
    ws.add_row ["Q#{i}", 10000*((rows/2-i) * (rows/2-i)), "=100*B#{i}/SUM(B3:B#{rows+offset})"], :style=>[nil, money, percent]
  end

  icon_set = Axlsx::IconSet.new
  ws.add_conditional_formatting("B3:B100", { :type => :iconSet, :dxfId => profitable, :priority => 1, :icon_set => icon_set })
end