[Feature request] Colored tange areas

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What steps will reproduce the problem?

1.
2.
3.

What is the expected output? What do you see instead?

Colored bars at different values, to mark ranges of values.

Please provide a source code snippet that we can use to replicate the issue.

What version of the product binary library are you using?

1.1.0

Please provide any additional information below.

My idea is to define an array of objects with a rangeMinValue, rangeMaxValue 
and rangeColor properties and draw them before the curves, so they stay under.
Also drawn before the grid, so the latter won't be covered by the bars.

It would be a visual help to follow the curve going inside or outside a certain 
range (or follow it through different ranges).

I actually do this by drawing several colored lines (curves with the same fixed 
value) before the actual curve/s.

But it has a very different impact.

Maybe I can achieve the same result by combining a horizontal bar graph and a 
vertical line graph?
Or the opposite, if I like a different orientation.

Thank you

Original issue reported on code.google.com by luca.cri...@gmail.com on 7 Sep 2013 at 9:00

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[deleted comment]

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It was: Colored RANGE areas. I accidentally wrote TANGE... ;)

Original comment by luca.cri...@gmail.com on 9 Sep 2013 at 8:55

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Original comment by dandrome...@gmail.com on 31 Oct 2013 at 9:22

• Changed state: Verified