Class PaintUtils

java.lang.Object
org.jdesktop.swingx.util.PaintUtils
public class PaintUtils extends Object
A collection of utilities for working with Paints and Colors.

  • Field Details

    • BLUE_EXPERIENCE

      public static final GradientPaint BLUE_EXPERIENCE

    • MAC_OSX_SELECTED

      public static final GradientPaint MAC_OSX_SELECTED

    • MAC_OSX

      public static final GradientPaint MAC_OSX

    • AERITH

      public static final GradientPaint AERITH

    • GRAY

      public static final GradientPaint GRAY

    • RED_XP

      public static final GradientPaint RED_XP

    • NIGHT_GRAY

      public static final GradientPaint NIGHT_GRAY

    • NIGHT_GRAY_LIGHT

      public static final GradientPaint NIGHT_GRAY_LIGHT

    • ORANGE_DELIGHT

      public static final Paint ORANGE_DELIGHT

    • BLACK_STAR

      public static final Paint BLACK_STAR

  • Constructor Details

    • PaintUtils

      private PaintUtils()

  • Method Details

    • resizeGradient

      public static Paint resizeGradient(Paint p, int width, int height)
      Resizes a gradient to fill the width and height available. If the gradient is left to right it will be resized to fill the entire width. If the gradient is top to bottom it will be resized to fill the entire height. If the gradient is on an angle it will be resized to go from one corner to the other of the rectangle formed by (0,0 -> width,height). This method can resize java.awt.GradientPaint, java.awt.LinearGradientPaint, and the LinearGradientPaint implementation from Apache's Batik project. Note, this method does not require the MultipleGradientPaint.jar from Apache to compile or to run. MultipleGradientPaint.jar *is* required if you want to resize the LinearGradientPaint from that jar. Any paint passed into this method which is not a kind of gradient paint (like a Color or TexturePaint) will be returned unmodified. It will not throw an exception. If the gradient cannot be resized due to other errors the original paint will be returned unmodified. It will not throw an exception.

    • resizeLinearGradient

      private static Paint resizeLinearGradient(Paint p, int width, int height)

    • invokeMethod

      private static Object invokeMethod(Object p, String methodName) throws NoSuchMethodException, InvocationTargetException, IllegalArgumentException, SecurityException, IllegalAccessException
      Throws:
      NoSuchMethodException
      InvocationTargetException
      IllegalArgumentException
      SecurityException
      IllegalAccessException

    • adjustPoints

      private static Point2D[] adjustPoints(Point2D[] pts, int width, int height)

    • isNear

      private static boolean isNear(double angle, double target, double error)

    • normalize

      private static float normalize(double original, float target)

    • calcAngle

      private static double calcAngle(Point2D p1, Point2D p2)

    • getCheckerPaint

      public static Paint getCheckerPaint()
      Creates a new Paint that is a checkered effect using the colors gray and Color.WHITE.
      Returns:
      a the checkered paint

    • getCheckerPaint

      public static Paint getCheckerPaint(Paint c1, Paint c2, int size)
      Creates a new Paint that is a checkered effect using the specified colors.

      While this method supports transparent colors, this implementation performs painting operations using the second color after it performs operations using the first color. This means that to create a checkered paint with a fully-transparent color, you MUST specify that color first.

      Parameters:
      c1 - the first color
      c2 - the second color
      size - the size of the paint
      Returns:
      a new Paint checkering the supplied colors

    • toHexString

      public static String toHexString(Color color)
      Creates a String that represents the supplied color as a hex-value RGB triplet, including the "#". The return value is suitable for use in HTML. The alpha (transparency) channel is neither include nor used in producing the string.
      Parameters:
      color - the color to convert
      Returns:
      the hex String

    • removeAlpha

      public static Color removeAlpha(Color color)
      Returns a new color equal to the old one, except that there is no alpha (transparency) channel.

      This method is a convenience and has the same effect as setAlpha(color, 255).

      Parameters:
      color - the color to remove the alpha (transparency) from
      Returns:
      a new non-transparent Color
      Throws:
      NullPointerException - if color is null

    • setAlpha

      public static Color setAlpha(Color color, int alpha)
      Returns a new color equal to the old one, except alpha (transparency) channel is set to the new value.
      Parameters:
      color - the color to modify
      alpha - the new alpha (transparency) level. Must be an int between 0 and 255
      Returns:
      a new alpha-applied Color
      Throws:
      IllegalArgumentException - if alpha is not between 0 and 255 inclusive
      NullPointerException - if color is null

    • setSaturation

      public static Color setSaturation(Color color, float saturation)
      Returns a new color equal to the old one, except the saturation is set to the new value. The new color will have the same alpha (transparency) as the original color.

      The color is modified using HSB calculations. The saturation must be a float between 0 and 1. If 0 the resulting color will be gray. If 1 the resulting color will be the most saturated possible form of the passed in color.

      Parameters:
      color - the color to modify
      saturation - the saturation to use in the new color
      Returns:
      a new saturation-applied Color
      Throws:
      IllegalArgumentException - if saturation is not between 0 and 1 inclusive
      NullPointerException - if color is null

    • setBrightness

      public static Color setBrightness(Color color, float brightness)
      Returns a new color equal to the old one, except the brightness is set to the new value. The new color will have the same alpha (transparency) as the original color.

      The color is modified using HSB calculations. The brightness must be a float between 0 and 1. If 0 the resulting color will be black. If 1 the resulting color will be the brightest possible form of the passed in color.

      Parameters:
      color - the color to modify
      brightness - the brightness to use in the new color
      Returns:
      a new brightness-applied Color
      Throws:
      IllegalArgumentException - if brightness is not between 0 and 1 inclusive
      NullPointerException - if color is null

    • blend

      public static Color blend(Color origin, Color over)
      Blends two colors to create a new color. The origin color is the base for the new color and regardless of its alpha component, it is treated as fully opaque (alpha 255).
      Parameters:
      origin - the base of the new color
      over - the alpha-enabled color to add to the origin color
      Returns:
      a new color comprised of the origin and over colors

    • interpolate

      public static Color interpolate(Color b, Color a, float t)
      Interpolates a color.
      Parameters:
      b - the first color
      a - the second color
      t - the amount to interpolate
      Returns:
      a new color

    • computeForeground

      public static Color computeForeground(Color bg)
      Computes an appropriate foreground color (either white or black) for the given background color.
      Parameters:
      bg - the background color
      Returns:
      Color.WHITE or Color.BLACK
      Throws:
      NullPointerException - if bg is null