Back to index...

	/*
	* Copyright (c) 2005, 2006, Oracle and/or its affiliates. All rights reserved.
	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
	*
	* This code is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License version 2 only, as
	* published by the Free Software Foundation. Oracle designates this
	* particular file as subject to the "Classpath" exception as provided
	* by Oracle in the LICENSE file that accompanied this code.
	*
	* This code is distributed in the hope that it will be useful, but WITHOUT
	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
	* version 2 for more details (a copy is included in the LICENSE file that
	* accompanied this code).
	*
	* You should have received a copy of the GNU General Public License version
	* 2 along with this work; if not, write to the Free Software Foundation,
	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
	*
	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
	* or visit www.oracle.com if you need additional information or have any
	* questions.
	*/
	package javax.swing.plaf.nimbus;

	import javax.swing.UIManager;
	import java.awt.Color;
	import java.beans.PropertyChangeSupport;
	import java.beans.PropertyChangeListener;

	/**
	* DerivedColor - A color implementation that is derived from a UIManager
	* defaults table color and a set of offsets. It can be rederived at any point
	* by calling rederiveColor(). For example when its parent color changes and it
	* value will update to reflect the new derived color. Property change events
	* are fired for the "rgb" property when the derived color changes.
	*
	* @author Jasper Potts
	*/
	class DerivedColor extends Color {
	private final String uiDefaultParentName;
	private final float hOffset, sOffset, bOffset;
	private final int aOffset;
	private int argbValue;

	DerivedColor(String uiDefaultParentName, float hOffset, float sOffset, float bOffset, int aOffset) {
	super(0);
	this.uiDefaultParentName = uiDefaultParentName;
	this.hOffset = hOffset;
	this.sOffset = sOffset;
	this.bOffset = bOffset;
	this.aOffset = aOffset;
	}

	public String getUiDefaultParentName() {
	return uiDefaultParentName;
	}

	public float getHueOffset() {
	return hOffset;
	}

	public float getSaturationOffset() {
	return sOffset;
	}

	public float getBrightnessOffset() {
	return bOffset;
	}

	public int getAlphaOffset() {
	return aOffset;
	}

	/**
	* Recalculate the derived color from the UIManager parent color and offsets
	*/
	public void rederiveColor() {
	Color src = UIManager.getColor(uiDefaultParentName);
	if (src != null) {
	float[] tmp = Color.RGBtoHSB(src.getRed(), src.getGreen(), src.getBlue(), null);
	// apply offsets
	tmp[0] = clamp(tmp[0] + hOffset);
	tmp[1] = clamp(tmp[1] + sOffset);
	tmp[2] = clamp(tmp[2] + bOffset);
	int alpha = clamp(src.getAlpha() + aOffset);
	argbValue = (Color.HSBtoRGB(tmp[0], tmp[1], tmp[2]) & 0xFFFFFF) \| (alpha << 24);
	} else {
	float[] tmp = new float[3];
	tmp[0] = clamp(hOffset);
	tmp[1] = clamp(sOffset);
	tmp[2] = clamp(bOffset);
	int alpha = clamp(aOffset);
	argbValue = (Color.HSBtoRGB(tmp[0], tmp[1], tmp[2]) & 0xFFFFFF) \| (alpha << 24);
	}
	}

	/**
	* Returns the RGB value representing the color in the default sRGB {@link java.awt.image.ColorModel}. (Bits 24-31
	* are alpha, 16-23 are red, 8-15 are green, 0-7 are blue).
	*
	* @return the RGB value of the color in the default sRGB <code>ColorModel</code>.
	* @see java.awt.image.ColorModel#getRGBdefault
	* @see #getRed
	* @see #getGreen
	* @see #getBlue
	* @since JDK1.0
	*/
	@Override public int getRGB() {
	return argbValue;
	}

	@Override
	public boolean equals(Object o) {
	if (this == o) return true;
	if (!(o instanceof DerivedColor)) return false;
	DerivedColor that = (DerivedColor) o;
	if (aOffset != that.aOffset) return false;
	if (Float.compare(that.bOffset, bOffset) != 0) return false;
	if (Float.compare(that.hOffset, hOffset) != 0) return false;
	if (Float.compare(that.sOffset, sOffset) != 0) return false;
	if (!uiDefaultParentName.equals(that.uiDefaultParentName)) return false;
	return true;
	}

	@Override
	public int hashCode() {
	int result = uiDefaultParentName.hashCode();
	result = 31 * result + hOffset != +0.0f ?
	Float.floatToIntBits(hOffset) : 0;
	result = 31 * result + sOffset != +0.0f ?
	Float.floatToIntBits(sOffset) : 0;
	result = 31 * result + bOffset != +0.0f ?
	Float.floatToIntBits(bOffset) : 0;
	result = 31 * result + aOffset;
	return result;
	}

	private float clamp(float value) {
	if (value < 0) {
	value = 0;
	} else if (value > 1) {
	value = 1;
	}
	return value;
	}

	private int clamp(int value) {
	if (value < 0) {
	value = 0;
	} else if (value > 255) {
	value = 255;
	}
	return value;
	}

	/**
	* Returns a string representation of this <code>Color</code>. This method
	* is intended to be used only for debugging purposes. The content and
	* format of the returned string might vary between implementations. The
	* returned string might be empty but cannot be <code>null</code>.
	*
	* @return a String representation of this <code>Color</code>.
	*/
	@Override
	public String toString() {
	Color src = UIManager.getColor(uiDefaultParentName);
	String s = "DerivedColor(color=" + getRed() + "," + getGreen() + "," + getBlue() +
	" parent=" + uiDefaultParentName +
	" offsets=" + getHueOffset() + "," + getSaturationOffset() + ","
	+ getBrightnessOffset() + "," + getAlphaOffset();
	return src == null ? s : s + " pColor=" + src.getRed() + "," + src.getGreen() + "," + src.getBlue();
	}

	static class UIResource extends DerivedColor implements javax.swing.plaf.UIResource {
	UIResource(String uiDefaultParentName, float hOffset, float sOffset,
	float bOffset, int aOffset) {
	super(uiDefaultParentName, hOffset, sOffset, bOffset, aOffset);
	}

	@Override
	public boolean equals(Object o) {
	return (o instanceof UIResource) && super.equals(o);
	}

	@Override
	public int hashCode() {
	return super.hashCode() + 7;
	}
	}
	}

Back to index...