Class ConicalGradientPaint

java.lang.Object

org.pushingpixels.radiance.theming.internal.utils.ConicalGradientPaint

All Implemented Interfaces:

Paint, Transparency

public final class ConicalGradientPaint
extends Object
implements Paint

A paint class that creates conical gradients around a given center point It could be used in the same way as LinearGradientPaint and RadialGradientPaint and follows the same syntax. You could use floats from 0.0 to 1.0 for the fractions which is standard but it's also possible to use angles from 0.0 to 360 degrees which is most of the times much easier to handle. Gradients always start at the top with a clockwise direction and you could rotate the gradient around the center by given offset. The offset could also be defined from -0.5 to +0.5 or -180 to +180 degrees. If you would like to use degrees instead of values from 0 to 1 you have to use the full constructor and set the USE_DEGREES variable to true. Contributed under the BSD license by Gerrit Grunwald. Original code from https://www.jug-muenster.de/java2d-conical-gradient-paint-674/

Author:

hansolo

Field Summary

Fields inherited from interface Transparency

BITMASK, OPAQUE, TRANSLUCENT

Constructor Summary

Constructors

Constructor	Description
ConicalGradientPaint(boolean USE_DEGREES, Point2D CENTER, float GIVEN_OFFSET, float[] GIVEN_FRACTIONS, Color[] GIVEN_COLORS)
ConicalGradientPaint(Point2D CENTER, float[] GIVEN_FRACTIONS, Color[] GIVEN_COLORS)

Method Summary

Modifier and Type	Method	Description
PaintContext	createContext(ColorModel COLOR_MODEL, Rectangle DEVICE_BOUNDS, Rectangle2D USER_BOUNDS, AffineTransform TRANSFORM, RenderingHints HINTS)
Color	getColorFromFraction(Color START_COLOR, Color DESTINATION_COLOR, int RANGE, int VALUE)	With the START_COLOR at the beginning and the DESTINATION_COLOR at the end of the given RANGE the method will calculate and return the color that equals the given VALUE. e.g. a START_COLOR of BLACK (R:0, G:0, B:0, A:255) and a DESTINATION_COLOR of WHITE(R:255, G:255, B:255, A:255) with a given RANGE of 100 and a given VALUE of 50 will return the color that is exactly in the middle of the gradient between black and white which is gray(R:128, G:128, B:128, A:255) So this method is really useful to calculate colors in gradients between two given colors.
int	getTransparency()

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

ConicalGradientPaint

public ConicalGradientPaint(Point2D CENTER,
 float[] GIVEN_FRACTIONS,
 Color[] GIVEN_COLORS)
                     throws IllegalArgumentException

Throws:

IllegalArgumentException

ConicalGradientPaint

public ConicalGradientPaint(boolean USE_DEGREES,
 Point2D CENTER,
 float GIVEN_OFFSET,
 float[] GIVEN_FRACTIONS,
 Color[] GIVEN_COLORS)
                     throws IllegalArgumentException

Throws:

IllegalArgumentException

Method Details

getColorFromFraction

public Color getColorFromFraction(Color START_COLOR,
 Color DESTINATION_COLOR,
 int RANGE,
 int VALUE)

With the START_COLOR at the beginning and the DESTINATION_COLOR at the end of the given RANGE the method will calculate and return the color that equals the given VALUE. e.g. a START_COLOR of BLACK (R:0, G:0, B:0, A:255) and a DESTINATION_COLOR of WHITE(R:255, G:255, B:255, A:255) with a given RANGE of 100 and a given VALUE of 50 will return the color that is exactly in the middle of the gradient between black and white which is gray(R:128, G:128, B:128, A:255) So this method is really useful to calculate colors in gradients between two given colors.

Parameters:

START_COLOR -

DESTINATION_COLOR -

RANGE -

VALUE -

Returns:

createContext

public PaintContext createContext(ColorModel COLOR_MODEL,
 Rectangle DEVICE_BOUNDS,
 Rectangle2D USER_BOUNDS,
 AffineTransform TRANSFORM,
 RenderingHints HINTS)

Specified by:

createContext in interface Paint

getTransparency

public int getTransparency()

Specified by:

getTransparency in interface Transparency