| java.lang.Object
 com.xoetrope.batik.ext.awt.MultipleGradientPaint
com.xoetrope.batik.ext.awt.RadialGradientPaint
| RadialGradientPaint | | final public class RadialGradientPaint extends MultipleGradientPaint (Code) | |
This class provides a way to fill a shape with a circular radial color
gradient pattern. The user may specify 2 or more gradient colors, and this
paint will provide an interpolation between each color.
The user must provide an array of floats specifying how to distribute the
colors along the gradient. These values should range from 0.0 to 1.0 and
act like keyframes along the gradient (they mark where the gradient should
be exactly a particular color).
This paint will map the first color of the gradient to a focus point within
the circle, and the last color to the perimeter of the circle, interpolating
smoothly for any inbetween colors specified by the user. Any line drawn
from the focus point to the circumference will span the all the gradient
colors. By default the focus is set to be the center of the circle.
Specifying a focus point outside of the circle's radius will result in the
focus being set to the intersection point of the focus-center line and the
perimenter of the circle.
Specifying a cycle method allows the user to control the painting behavior
outside of the bounds of the circle's radius. See LinearGradientPaint for
more details.
The following code demonstrates typical usage of RadialGradientPaint:
Point2D center = new Point2D.Float(0, 0);
float radius = 20;
float[] dist = {0.0, 0.2, 1.0};
Color[] colors = {Color.red, Color.white, Color.blue};
RadialGradientPaint p = new RadialGradientPaint(center, radius,
dist, colors);
In the event that the user does not set the first keyframe value equal
to 0 and the last keyframe value equal to 1, keyframes will be created at
these positions and the first and last colors will be replicated there.
So, if a user specifies the following arrays to construct a gradient:
{Color.blue, Color.red}, {.3, .7}
this will be converted to a gradient with the following keyframes:
{Color.blue, Color.blue, Color.red, Color.red}, {0, .3, .7, 1}
This image demonstrates a radial gradient with NO_CYCLE and default focus.
This image demonstrates a radial gradient with NO_CYCLE and non-centered
focus.
This image demonstrates a radial gradient with REFLECT and non-centered
focus.
author:
Nicholas Talian, Vincent Hardy, Jim Graham, Jerry Evans
author:
Vincent Hardy
version:
$Id: RadialGradientPaint.java,v 1.2 2006/08/31 09:28:47 val Exp $ |
| Constructor Summary | |
| public | RadialGradientPaint(float cx, float cy, float radius, float[] fractions, Color[] colors)
Constructs a RadialGradientPaint, using the center as the
focus point.
Parameters:
cx - the x coordinate in user space of the center point of the circle defining the gradient. | | public | RadialGradientPaint(Point2D center, float radius, float[] fractions, Color[] colors)
Constructs a RadialGradientPaint, using the center as the
focus point.
Parameters:
center - the center point, in user space, of the circle defining the gradient
Parameters:
radius - the radius of the circle defining the extents of the color gradient
Parameters:
fractions - numbers ranging from 0.0 to 1.0 specifying the distribution of colors along the gradient
Parameters:
colors - array of colors to use in the gradient. | | public | RadialGradientPaint(float cx, float cy, float radius, float fx, float fy, float[] fractions, Color[] colors)
Constructs a RadialGradientPaint.
Parameters:
cx - the x coordinate in user space of the center point of the circle defining the gradient. | | public | RadialGradientPaint(Point2D center, float radius, Point2D focus, float[] fractions, Color[] colors)
Constructs a RadialGradientPaint.
Parameters:
center - the center point, in user space, of the circle defining the gradient. | | public | RadialGradientPaint(Point2D center, float radius, Point2D focus, float[] fractions, Color[] colors, CycleMethodEnum cycleMethod, ColorSpaceEnum colorSpace)
Constructs a RadialGradientPaint.
Parameters:
center - the center point in user space of the circle defining thegradient. | | public | RadialGradientPaint(Point2D center, float radius, Point2D focus, float[] fractions, Color[] colors, CycleMethodEnum cycleMethod, ColorSpaceEnum colorSpace, AffineTransform gradientTransform)
Constructs a RadialGradientPaint.
Parameters:
center - the center point in user space of the circle defining thegradient. | | public | RadialGradientPaint(Rectangle2D gradientBounds, float[] fractions, Color[] colors)
Constructs a RadialGradientPaint, the gradient circle is
defined by a bounding box.
Parameters:
gradientBounds - the bounding box, in user space, of the circle defining outermost extent of the gradient.
Parameters:
fractions - numbers ranging from 0.0 to 1.0 specifying the distribution of colors along the gradient
Parameters:
colors - array of colors to use in the gradient. |
| RadialGradientPaint | | public RadialGradientPaint(float cx, float cy, float radius, float[] fractions, Color[] colors)(Code) | |
Constructs a RadialGradientPaint, using the center as the
focus point.
Parameters:
cx - the x coordinate in user space of the center point of the circle defining the gradient. The last color of the gradient is mappedto the perimeter of this circle
Parameters:
cy - the y coordinate in user space of the center point of the circle defining the gradient. The last color of the gradient is mappedto the perimeter of this circle
Parameters:
radius - the radius of the circle defining the extents of the color gradient
Parameters:
fractions - numbers ranging from 0.0 to 1.0 specifying the distribution of colors along the gradient
Parameters:
colors - array of colors to use in the gradient. The first color is used at the focus point, the last color around the perimeter of the circle.
throws:
IllegalArgumentException - if fractions.length != colors.length, or if colors is less than 2 in size, or if radius < 0 |
| RadialGradientPaint | | public RadialGradientPaint(Point2D center, float radius, float[] fractions, Color[] colors)(Code) | |
Constructs a RadialGradientPaint, using the center as the
focus point.
Parameters:
center - the center point, in user space, of the circle defining the gradient
Parameters:
radius - the radius of the circle defining the extents of the color gradient
Parameters:
fractions - numbers ranging from 0.0 to 1.0 specifying the distribution of colors along the gradient
Parameters:
colors - array of colors to use in the gradient. The first color is used at the focus point, the last color around the perimeter of the circle.
throws:
NullPointerException - if center point is null
throws:
IllegalArgumentException - if fractions.length != colors.length, or if colors is less than 2 in size, or if radius < 0 |
| RadialGradientPaint | | public RadialGradientPaint(float cx, float cy, float radius, float fx, float fy, float[] fractions, Color[] colors)(Code) | |
Constructs a RadialGradientPaint.
Parameters:
cx - the x coordinate in user space of the center point of the circle defining the gradient. The last color of the gradient is mappedto the perimeter of this circle
Parameters:
cy - the y coordinate in user space of the center point of the circle defining the gradient. The last color of the gradient is mappedto the perimeter of this circle
Parameters:
radius - the radius of the circle defining the extents of the color gradient
Parameters:
fx - the x coordinate of the point in user space to which the first color is mapped
Parameters:
fy - the y coordinate of the point in user space to which the first color is mapped
Parameters:
fractions - numbers ranging from 0.0 to 1.0 specifying the distribution of colors along the gradient
Parameters:
colors - array of colors to use in the gradient. The first color is used at the focus point, the last color around the perimeter of the circle.
throws:
IllegalArgumentException - if fractions.length != colors.length, or if colors is less than 2 in size, or if radius < 0 |
| RadialGradientPaint | | public RadialGradientPaint(Point2D center, float radius, Point2D focus, float[] fractions, Color[] colors)(Code) | |
Constructs a RadialGradientPaint.
Parameters:
center - the center point, in user space, of the circle defining the gradient. The last color of the gradient is mapped to the perimeterof this circle
Parameters:
radius - the radius of the circle defining the extents of the colorgradient
Parameters:
focus - the point, in user space, to which the first color is mapped
Parameters:
fractions - numbers ranging from 0.0 to 1.0 specifying the distribution of colors along the gradient
Parameters:
colors - array of colors to use in the gradient. The first color is used at the focus point, the last color around the perimeter of thecircle.
throws:
NullPointerException - if one of the points is null
throws:
IllegalArgumentException - if fractions.length != colors.length, or if colors is less than 2 in size, or if radius < 0 |
| RadialGradientPaint | | public RadialGradientPaint(Point2D center, float radius, Point2D focus, float[] fractions, Color[] colors, CycleMethodEnum cycleMethod, ColorSpaceEnum colorSpace)(Code) | |
Constructs a RadialGradientPaint.
Parameters:
center - the center point in user space of the circle defining thegradient. The last color of the gradient is mapped to the perimeter of this circle
Parameters:
radius - the radius of the circle defining the extents of the colorgradient
Parameters:
focus - the point in user space to which the first color is mapped
Parameters:
fractions - numbers ranging from 0.0 to 1.0 specifying the distribution of colors along the gradient
Parameters:
colors - array of colors to use in the gradient. The first color isused at the focus point, the last color around the perimeter of the circle.
Parameters:
cycleMethod - either NO_CYCLE, REFLECT, or REPEAT
Parameters:
colorSpace - which colorspace to use for interpolation, either SRGB or LINEAR_RGB
throws:
NullPointerException - if one of the points is null
throws:
IllegalArgumentException - if fractions.length != colors.length, or if colors is less than 2 in size, or if radius < 0 |
| RadialGradientPaint | | public RadialGradientPaint(Point2D center, float radius, Point2D focus, float[] fractions, Color[] colors, CycleMethodEnum cycleMethod, ColorSpaceEnum colorSpace, AffineTransform gradientTransform)(Code) | |
Constructs a RadialGradientPaint.
Parameters:
center - the center point in user space of the circle defining thegradient. The last color of the gradient is mapped to the perimeter ofthis circle
Parameters:
radius - the radius of the circle defining the extents of the colorgradient.
Parameters:
focus - the point in user space to which the first color is mapped
Parameters:
fractions - numbers ranging from 0.0 to 1.0 specifying the distribution of colors along the gradient
Parameters:
colors - array of colors to use in the gradient. The first color isused at the focus point, the last color around the perimeter of the circle.
Parameters:
cycleMethod - either NO_CYCLE, REFLECT, or REPEAT
Parameters:
colorSpace - which colorspace to use for interpolation, either SRGB or LINEAR_RGB
Parameters:
gradientTransform - transform to apply to the gradient
throws:
NullPointerException - if one of the points is null, or gradientTransform is null
throws:
IllegalArgumentException - if fractions.length != colors.length, or if colors is less than 2 in size, or if radius < 0 |
| RadialGradientPaint | | public RadialGradientPaint(Rectangle2D gradientBounds, float[] fractions, Color[] colors)(Code) | |
Constructs a RadialGradientPaint, the gradient circle is
defined by a bounding box.
Parameters:
gradientBounds - the bounding box, in user space, of the circle defining outermost extent of the gradient.
Parameters:
fractions - numbers ranging from 0.0 to 1.0 specifying the distribution of colors along the gradient
Parameters:
colors - array of colors to use in the gradient. The first color is used at the focus point, the last color around the perimeter of the circle.
throws:
NullPointerException - if the gradientBounds is null
throws:
IllegalArgumentException - if fractions.length != colors.length, or if colors is less than 2 in size, or if radius < 0 |
| createContext | | public PaintContext createContext(ColorModel cm, Rectangle deviceBounds, Rectangle2D userBounds, AffineTransform transform, RenderingHints hints)(Code) | |
Creates and returns a PaintContext used to generate the color pattern,
for use by the internal rendering engine.
Parameters:
cm - ColorModel that receivesthe Paint data. This is used only as a hint.
Parameters:
deviceBounds - the device space bounding box of the graphics primitive being rendered
Parameters:
userBounds - the user space bounding box of the graphics primitive being rendered
Parameters:
transform - the AffineTransform from userspace into device space
Parameters:
hints - the hints that the context object uses to choosebetween rendering alternatives the PaintContext that generates color patterns.
throws:
IllegalArgumentException - if the transform is not invertible
See Also: PaintContext |
| getCenterPoint | | public Point2D getCenterPoint()(Code) | | Returns a copy of the center point of the radial gradient.
a Point2D object that is a copy of the center point |
| getFocusPoint | | public Point2D getFocusPoint()(Code) | | Returns a copy of the end point of the gradient axis.
a Point2D object that is a copy of the focus point |
| getRadius | | public float getRadius()(Code) | | Returns the radius of the circle defining the radial gradient.
the radius of the circle defining the radial gradient |
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