Just noticed this, not what I was expecting. I'll file a bug unless
someone can convincingly explain it's correct behaviour...
[NSGradient interpolatedColorAtLocation:<value>];
If the gradient has stops that run from, say, 0.5 to 1.0, but <value>
is less than 0.5, this method returns nil. I would have expected it to
return the extended colour, i.e. the first one in this case.
The discussion for this method says:
"This method does not simply return the color values used to
initialize the receiver. Instead, it computes the value that would be
drawn at the specified location."
For the case above this depends on whether the gradient will be drawn
with the colour extending flags set, but since this method doesn't
know about those flags, it's not well-defined. I would suggest that
the method should assume the flags are set, since that's a useful
assumption, whereas the opposite isn't.
Also, the discussion says:
"The start color of the gradient is always located at 0.0 and the end
color is always at 1.0."
Which is simply untrue.
--Graham
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