Functions to compute color shadows, light and dark.
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Functions
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checkRGBRange
computeColorTriplet
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checkRGBRange
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checkRGBRange ( value, maxBits=16 )
Make sure the RGB value represents no more than maxBits value.
The computeColorTriplet function is a bit sloppy with math, and
uses this function to clean up values before returning them.
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computeColorTriplet
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computeColorTriplet ( widget, baseColor )
Compute a set of three colors, given a baseColor.
Returns (baseColor, lightColor, darkColor).
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