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graphics - Hatched bars and bar-specific background in BarChart



I would like to diagonally hatch the bars in BarChart and to have three different background colors for the different bars, like this:


enter image description here


Any ideas how to reproduce this image? The closest post I found is here.



Answer



With a bit of manual parameters:


barFilled[gap_, h_, seg_][{{xmin_, xmax_}, {ymin_, ymax_}}, ___] := 
 Module[{width, line, yt, yb, lend},
  {yb, yt} = Sort[{ymin, ymax}];
  width = xmax - xmin;
  line = Table[{{xmin, i}, {xmax, i + width}}, {i, yb, yt - width, h/seg}];

  lend = line[[-1, 1, 2]];
  line = {Line[line],
     Line[Table[{{xmin + i, yb}, {xmax, yb + width - i}}, {i, h/seg, width, h/seg}]], 
     Line[Table[{{xmin, lend + i}, {xmax - (lend + width - yt) - i,yt}}, {i, h/seg, width + h/seg, h/seg}]]};
   {{Opacity[.2], EdgeForm[], Rectangle[{xmin, -h}, {xmax + gap, h}]},
    {CapForm["Butt"], line}, {FaceForm[], Rectangle[{xmin, ymin}, {xmax, ymax}]}}]

BarChart[{2, -1, 1.5, -3, 3, 2.5}, BarSpacing -> 2, 
 ChartElementFunction -> barFilled[.65, 3, 35], ChartStyle -> 61, 
 GridLines -> {None, Automatic}]


enter image description here


Like AimForClarity mentioned, to avoid empty strip, we could replace 0 with some dummy value + meta and define barFilled for that value. For example:


barFilled[gap_, h_, seg_][{{xmin_, xmax_}, {ymin_, ymax_}}, _, {None}] :=
 {{Opacity[.2], EdgeForm[], Rectangle[{xmin, -h}, {xmax + gap, h}]}}

BarChart[{2, -1, 0, -2, 1, 2} /. {0 -> (1 -> None)}, BarSpacing -> 2,  ChartElementFunction -> barFilled[.65, 2, 35], 
ChartStyle -> 61, GridLines -> {None, Automatic}]

enter image description here



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