Creates a linear gradient value from a string representation.

The format of the string representation is based on JavaFX CSS specification for linear gradient which is

 linear-gradient( [ [from <point> to <point>| [ to <side-or-corner>], ]? [ [ repeat | reflect ], ]? <color-stop>[, <color-stop>]+)

where

 <side-or-corner> = [left | right] || [top | bottom]
 <point> = [ [ <length> <length> ] | [ <percentage> | <percentage> ] ]
 <color-stop> = [ <color> [ <percentage> | <length>]? ]

Currently length can be only specified in px, the specification of unit can be omited. Format of color representation is the one used in Color.web(String color). The linear-gradient keyword can be omited. For additional information about the format of string representation, see the CSS Reference Guide.

Examples:


 LinearGradient g
      = LinearGradient.valueOf("linear-gradient(from 0% 0% to 100% 100%, red  0% , blue 30%,  black 100%)");
 LinearGradient g
      = LinearGradient.valueOf("from 0% 0% to 100% 100%, red  0% , blue 30%,  black 100%");
 LinearGradient g
      = LinearGradient.valueOf("linear-gradient(from 0px 0px to 200px 0px, #00ff00 0%, 0xff0000 50%, 0x1122ff40 100%)");
 LinearGradient g
      = LinearGradient.valueOf("from 0px 0px to 200px 0px, #00ff00 0%, 0xff0000 50%, 0x1122ff40 100%");

Parameters:

value the string to convert

Returns: a LinearGradient object holding the value represented by the string argument.

Exceptions:

NullPointerException if the value is null

IllegalArgumentException if the value cannot be parsed

Since: JavaFX 2.1

`NullPointerException`		if the `value` is `null`
`IllegalArgumentException`		if the `value` cannot be parsed