eu.hansolo.steelseries.tools.ContourGradientPaint Maven / Gradle / Ivy
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The SteelSeries is a javabeans component library that contains gauges.
You will find linear and radial gauges. In addition you will also find
digital displays, indicators from cars and some instruments from airplanes and
sailboats.
/*
* To change this template, choose Tools | Templates
* and open the template in the editor.
*/
package eu.hansolo.steelseries.tools;
/**
* A paint class that creates a gradient that is a combination of four linear
* gradient paints. Each of the gradients start at one of the four sides of
* the given bounds rectangle and fill stop in the center of the boundary rectangle.
* You could use it like the other gradient paints in the jdk (LinearGradientPaint and RadialGradientPaint).
* You simply have to pass the boundary box of your element, a array of floats for the fractions and
* a array of colors to the ContourGradientPaint. If you would like to create a diamond like gradient
* you have to pass a boundary rectangle that is square (width == height).
* Even if the name implies that it uses the contour of a shape it will always use the rectangular
* boundary box of your shape!
* @version 1.0
* @author hansolo
*/
public final class ContourGradientPaint implements java.awt.Paint
{
private static final eu.hansolo.steelseries.tools.Util UTIL = eu.hansolo.steelseries.tools.Util.INSTANCE;
private final java.awt.geom.Rectangle2D BOUNDS;
private final Float[] FRACTIONS;
private final java.awt.Color[] COLORS;
private final java.util.ArrayList COLOR_LOOKUP = new java.util.ArrayList();
/**
* Enhanced constructor which takes the FRACTIONS in degress from 0.0f to 360.0f and
* also an GIVEN_OFFSET in degrees around the rotation CENTER
* @param GIVEN_BOUNDS
* @param GIVEN_FRACTIONS
* @param GIVEN_COLORS
* @throws IllegalArgumentException
*/
public ContourGradientPaint(final java.awt.geom.Rectangle2D GIVEN_BOUNDS, final float[] GIVEN_FRACTIONS, final java.awt.Color[] GIVEN_COLORS) throws IllegalArgumentException
{
// Set the values
this.BOUNDS = GIVEN_BOUNDS;
// Check that fractions and colors are of the same size
if (GIVEN_FRACTIONS.length != GIVEN_COLORS.length)
{
throw new IllegalArgumentException("Fractions and colors must be equal in size");
}
final java.util.ArrayList FRACTION_LIST = new java.util.ArrayList(GIVEN_FRACTIONS.length);
for (float fraction : GIVEN_FRACTIONS)
{
FRACTION_LIST.add(fraction);
}
// Adjust fractions and colors array in the case where startvalue != 0.0f and/or endvalue != 1.0f
final java.util.List COLOR_LIST = new java.util.ArrayList(GIVEN_COLORS.length);
COLOR_LIST.addAll(java.util.Arrays.asList(GIVEN_COLORS));
// Assure that fractions start with 0.0f
if (FRACTION_LIST.get(0) != 0.0f)
{
FRACTION_LIST.add(0, 0.0f);
final java.awt.Color TMP_COLOR = COLOR_LIST.get(0);
COLOR_LIST.add(0, TMP_COLOR);
}
// Assure that fractions end with 1.0f
if (FRACTION_LIST.get(FRACTION_LIST.size() - 1) != 1.0f)
{
FRACTION_LIST.add(1.0f);
COLOR_LIST.add(GIVEN_COLORS[0]);
}
COLORS = new java.awt.Color[COLOR_LIST.size()];
FRACTIONS = new Float[FRACTION_LIST.size()];
COLOR_LIST.toArray(COLORS);
FRACTION_LIST.toArray(FRACTIONS);
// Prepare color lookup table
COLOR_LOOKUP.clear();
COLOR_LOOKUP.addAll(prepareColorLookup());
}
private java.util.ArrayList prepareColorLookup()
{
final int SIZE = BOUNDS.getWidth() <= BOUNDS.getHeight() ? ((int)(BOUNDS.getWidth() / 2.0)) : ((int)(BOUNDS.getHeight() / 2.0));
final java.util.ArrayList TMP_COLOR_LOOKUP = new java.util.ArrayList(SIZE);
int relativeValue;
for(int colorIndex = 0 ; colorIndex < COLORS.length - 1 ; colorIndex++)
{
relativeValue = 0;
for (int value = (int)(FRACTIONS[colorIndex] * SIZE) ; value < (int)(FRACTIONS[colorIndex + 1] * SIZE) ; value++)
{
TMP_COLOR_LOOKUP.add(UTIL.getColorFromFraction(COLORS[colorIndex], COLORS[colorIndex+1], (int)((FRACTIONS[colorIndex + 1] - FRACTIONS[colorIndex]) * SIZE), relativeValue));
relativeValue++;
}
}
return (java.util.ArrayList) TMP_COLOR_LOOKUP.clone();
}
@Override
public java.awt.PaintContext createContext(final java.awt.image.ColorModel COLOR_MODEL, final java.awt.Rectangle DEVICE_BOUNDS, final java.awt.geom.Rectangle2D USER_BOUNDS, final java.awt.geom.AffineTransform TRANSFORM, final java.awt.RenderingHints HINTS)
{
return new DiamondGradientPaintContext();
}
@Override
public int getTransparency()
{
return java.awt.Transparency.TRANSLUCENT;
}
private final class DiamondGradientPaintContext implements java.awt.PaintContext
{
private final java.awt.geom.Point2D P1;
private final java.awt.geom.Point2D P2;
final java.awt.geom.GeneralPath SECTOR_A = new java.awt.geom.GeneralPath();
final java.awt.geom.GeneralPath SECTOR_B = new java.awt.geom.GeneralPath();
final java.awt.geom.GeneralPath SECTOR_C = new java.awt.geom.GeneralPath();
final java.awt.geom.GeneralPath SECTOR_D = new java.awt.geom.GeneralPath();
public DiamondGradientPaintContext()
{
if (BOUNDS.getWidth() > BOUNDS.getHeight())
{
this.P1 = new java.awt.geom.Point2D.Double(BOUNDS.getX() + BOUNDS.getHeight() / 2.0, BOUNDS.getY() + BOUNDS.getHeight() / 2.0);
this.P2 = new java.awt.geom.Point2D.Double(BOUNDS.getMaxX() - BOUNDS.getHeight() / 2.0, BOUNDS.getMinY() + BOUNDS.getHeight() / 2.0);
}
else if (BOUNDS.getWidth() < BOUNDS.getHeight())
{
this.P1 = new java.awt.geom.Point2D.Double(BOUNDS.getX() + BOUNDS.getWidth() / 2.0, BOUNDS.getY() + BOUNDS.getWidth() / 2.0);
this.P2 = new java.awt.geom.Point2D.Double(BOUNDS.getX() + BOUNDS.getWidth() / 2.0, BOUNDS.getMaxY() - BOUNDS.getWidth() / 2.0);
}
else
{
this.P1 = new java.awt.geom.Point2D.Double(BOUNDS.getX() + BOUNDS.getWidth() / 2.0, BOUNDS.getY() + BOUNDS.getHeight() / 2.0);
this.P2 = P1;
}
// Definition of the 4 sectors
SECTOR_A.moveTo(BOUNDS.getMinX(), BOUNDS.getMaxY());
SECTOR_A.lineTo(P1.getX(), P2.getY());
SECTOR_A.lineTo(P1.getX(), P1.getY());
SECTOR_A.lineTo(BOUNDS.getMinX(), BOUNDS.getMinY());
SECTOR_A.closePath();
SECTOR_B.moveTo(BOUNDS.getMinX(), BOUNDS.getMinY());
SECTOR_B.lineTo(P1.getX(), P1.getY());
SECTOR_B.lineTo(P2.getX(), P1.getY());
SECTOR_B.lineTo(BOUNDS.getMaxX(), BOUNDS.getMinY());
SECTOR_B.closePath();
SECTOR_C.moveTo(BOUNDS.getMaxX(), BOUNDS.getMinY());
SECTOR_C.lineTo(P2.getX(), P1.getY());
SECTOR_C.lineTo(P2.getX(), P2.getY());
SECTOR_C.lineTo(BOUNDS.getMaxX(), BOUNDS.getMaxY());
SECTOR_C.closePath();
SECTOR_D.moveTo(BOUNDS.getMaxX(), BOUNDS.getMaxY());
SECTOR_D.lineTo(P2.getX(), P2.getY());
SECTOR_D.lineTo(P1.getX(), P2.getY());
SECTOR_D.lineTo(BOUNDS.getMinX(), BOUNDS.getMaxY());
SECTOR_D.closePath();
}
@Override
public void dispose()
{
}
@Override
public java.awt.image.ColorModel getColorModel()
{
return java.awt.image.ColorModel.getRGBdefault();
}
@Override
public java.awt.image.Raster getRaster(final int X, final int Y, final int TILE_WIDTH, final int TILE_HEIGHT)
{
// The moving point
final java.awt.Point P = new java.awt.Point(0,0);
// Create raster for given colormodel
final java.awt.image.WritableRaster RASTER = getColorModel().createCompatibleWritableRaster(TILE_WIDTH, TILE_HEIGHT);
// Create data array with place for red, green, blue and alpha values
int[] data = new int[(TILE_WIDTH * TILE_HEIGHT * 4)];
java.awt.Color currentColor = new java.awt.Color(0.0f, 0.0f, 0.0f, 0.0f);
int currentRed = 0;
int currentGreen = 0;
int currentBlue = 0 ;
int currentAlpha = 0;
for (int tileY = 0; tileY < TILE_HEIGHT; tileY++)
{
for (int tileX = 0; tileX < TILE_WIDTH; tileX++)
{
P.setLocation(X + tileX, Y + tileY);
if (SECTOR_A.contains(P))
{
if (X + tileX - BOUNDS.getBounds().x < COLOR_LOOKUP.size())
{
currentColor = COLOR_LOOKUP.get(X + tileX - BOUNDS.getBounds().x);
}
}
if (SECTOR_B.contains(P))
{
if (Y + tileY - BOUNDS.getBounds().y < COLOR_LOOKUP.size())
{
currentColor = COLOR_LOOKUP.get(Y + tileY - BOUNDS.getBounds().y);
}
}
if (SECTOR_C.contains(P))
{
if (COLOR_LOOKUP.size() - (X + tileX - SECTOR_A.getBounds().width - BOUNDS.getBounds().x - ((int) P2.getX() - (int)P1.getX())) < COLOR_LOOKUP.size())
{
currentColor = COLOR_LOOKUP.get(COLOR_LOOKUP.size() - (X + tileX - SECTOR_A.getBounds().width - BOUNDS.getBounds().x - ((int) P2.getX() - (int)P1.getX())));
}
}
if (SECTOR_D.contains(P))
{
if ((COLOR_LOOKUP.size() - (Y + tileY - SECTOR_B.getBounds().height - BOUNDS.getBounds().y - ((int)P2.getY() - (int)P1.getY()))) < COLOR_LOOKUP.size())
{
currentColor = COLOR_LOOKUP.get(COLOR_LOOKUP.size() - (Y + tileY - SECTOR_B.getBounds().height - BOUNDS.getBounds().y - ((int)P2.getY() - (int)P1.getY())));
}
}
// Split the current color in it's parts
currentRed = currentColor.getRed();
currentGreen = currentColor.getGreen();
currentBlue = currentColor.getBlue();
currentAlpha = currentColor.getAlpha();
// Fill data array with calculated color values
final int BASE = (tileY * TILE_WIDTH + tileX) * 4;
data[BASE + 0] = currentRed;
data[BASE + 1] = currentGreen;
data[BASE + 2] = currentBlue;
data[BASE + 3] = currentAlpha;
}
}
// Fill the raster with the data
RASTER.setPixels(0, 0, TILE_WIDTH, TILE_HEIGHT, data);
return RASTER;
}
}
@Override
public String toString()
{
return "ContourGradientPaint";
}
}