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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.
/*
* Copyright (c) 2012, Gerrit Grunwald
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* The names of its contributors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package eu.hansolo.steelseries.tools;
import java.awt.Color;
import java.awt.Paint;
import java.awt.PaintContext;
import java.awt.Point;
import java.awt.Rectangle;
import java.awt.RenderingHints;
import java.awt.geom.AffineTransform;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.awt.Transparency;
import java.awt.image.ColorModel;
import java.awt.image.Raster;
import java.awt.image.WritableRaster;
import java.util.ArrayList;
import java.util.List;
/**
* 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 Paint {
private static final Util UTIL = Util.INSTANCE;
private final Rectangle2D BOUNDS;
private final Float[] FRACTIONS;
private final Color[] COLORS;
private List colorLookup = new ArrayList(256);
/**
* 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 Rectangle2D GIVEN_BOUNDS, final float[] GIVEN_FRACTIONS, final 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");
}
List fractionList = new ArrayList(GIVEN_FRACTIONS.length);
for (float fraction : GIVEN_FRACTIONS) {
fractionList.add(fraction);
}
// Adjust fractions and colors array in the case where startvalue != 0.0f and/or endvalue != 1.0f
List colorList = new ArrayList(GIVEN_COLORS.length);
colorList.addAll(java.util.Arrays.asList(GIVEN_COLORS));
// Assure that fractions start with 0.0f
if (fractionList.get(0) != 0.0f) {
fractionList.add(0, 0.0f);
final Color TMP_COLOR = colorList.get(0);
colorList.add(0, TMP_COLOR);
}
// Assure that fractions end with 1.0f
if (fractionList.get(fractionList.size() - 1) != 1.0f) {
fractionList.add(1.0f);
colorList.add(GIVEN_COLORS[0]);
}
COLORS = new Color[colorList.size()];
FRACTIONS = new Float[fractionList.size()];
colorList.toArray(COLORS);
fractionList.toArray(FRACTIONS);
// Prepare color lookup table
colorLookup.clear();
colorLookup.addAll(prepareColorLookup());
}
private List prepareColorLookup() {
final int SIZE = BOUNDS.getWidth() <= BOUNDS.getHeight() ? ((int) (BOUNDS.getWidth() / 2.0)) : ((int) (BOUNDS.getHeight() / 2.0));
List tmpColorLookup = new 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++) {
tmpColorLookup.add(UTIL.getColorFromFraction(COLORS[colorIndex], COLORS[colorIndex + 1], (int) ((FRACTIONS[colorIndex + 1] - FRACTIONS[colorIndex]) * SIZE), relativeValue));
relativeValue++;
}
}
return (ArrayList) tmpColorLookup;
}
@Override
public java.awt.PaintContext createContext(final ColorModel COLOR_MODEL,
final Rectangle DEVICE_BOUNDS,
final Rectangle2D USER_BOUNDS,
final AffineTransform TRANSFORM,
final RenderingHints HINTS) {
return new ContourGradientPaintContext();
}
@Override
public int getTransparency() {
return Transparency.TRANSLUCENT;
}
private final class ContourGradientPaintContext implements PaintContext {
private final Point2D P1;
private final Point2D P2;
final GeneralPath SECTOR_A = new GeneralPath();
final GeneralPath SECTOR_B = new GeneralPath();
final GeneralPath SECTOR_C = new GeneralPath();
final GeneralPath SECTOR_D = new GeneralPath();
public ContourGradientPaintContext() {
if (BOUNDS.getWidth() > BOUNDS.getHeight()) {
this.P1 = new Point2D.Double(BOUNDS.getX() + BOUNDS.getHeight() / 2.0, BOUNDS.getY() + BOUNDS.getHeight() / 2.0);
this.P2 = new Point2D.Double(BOUNDS.getMaxX() - BOUNDS.getHeight() / 2.0, BOUNDS.getMinY() + BOUNDS.getHeight() / 2.0);
} else if (BOUNDS.getWidth() < BOUNDS.getHeight()) {
this.P1 = new Point2D.Double(BOUNDS.getX() + BOUNDS.getWidth() / 2.0, BOUNDS.getY() + BOUNDS.getWidth() / 2.0);
this.P2 = new Point2D.Double(BOUNDS.getX() + BOUNDS.getWidth() / 2.0, BOUNDS.getMaxY() - BOUNDS.getWidth() / 2.0);
} else {
this.P1 = new 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 ColorModel getColorModel() {
return ColorModel.getRGBdefault();
}
@Override
public Raster getRaster(final int X, final int Y, final int TILE_WIDTH, final int TILE_HEIGHT) {
// The moving point
final Point P = new Point(0, 0);
// Create raster for given colormodel
final 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)];
Color currentColor = new 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 < colorLookup.size()) {
currentColor = colorLookup.get(X + tileX - BOUNDS.getBounds().x);
}
}
if (SECTOR_B.contains(P)) {
if (Y + tileY - BOUNDS.getBounds().y < colorLookup.size()) {
currentColor = colorLookup.get(Y + tileY - BOUNDS.getBounds().y);
}
}
if (SECTOR_C.contains(P)) {
if (colorLookup.size() - (X + tileX - SECTOR_A.getBounds().width - BOUNDS.getBounds().x - ((int) P2.getX() - (int) P1.getX())) < colorLookup.size()) {
currentColor = colorLookup.get(colorLookup.size() - (X + tileX - SECTOR_A.getBounds().width - BOUNDS.getBounds().x - ((int) P2.getX() - (int) P1.getX())));
}
}
if (SECTOR_D.contains(P)) {
if ((colorLookup.size() - (Y + tileY - SECTOR_B.getBounds().height - BOUNDS.getBounds().y - ((int) P2.getY() - (int) P1.getY()))) < colorLookup.size()) {
currentColor = colorLookup.get(colorLookup.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";
}
}
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