Identifying Parts of a Scale
To find out
what part of the Scale a coordinate resides in, use the
identify
method:
$value = $scale->identify(x, y
);
The identify
method returns a string containing
one of the following values: "slider"
,
"trough1"
, "trough2"
, or an
empty string (if the coordinates don’t refer to any of these
parts).
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