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/*
* Copyright (c) 2005-2019 Substance Kirill Grouchnikov. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* o Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* o 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.
*
* o Neither the name of Substance Kirill Grouchnikov nor the names of
* its contributors may 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 OWNER 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 org.pushingpixels.substance.api.painter;
import org.pushingpixels.substance.api.colorscheme.ColorSchemeSingleColorQuery;
import org.pushingpixels.substance.api.colorscheme.SubstanceColorScheme;
import org.pushingpixels.substance.api.trait.SubstanceTrait;
/**
* Base painter with fraction-based stops and a color query associated with each
* stop. This class allows creating multi-stop gradients with exact control over
* which color is used at every gradient control point.
*
* @author Kirill Grouchnikov
*/
public abstract class FractionBasedPainter implements SubstanceTrait {
/**
* The display name of this painter.
*/
private String displayName;
/**
* The fractions of this painter. If the constructor has not thrown an
* {@link IllegalArgumentException}, the entries in this array are strictly
* increasing, starting from 0.0 and ending at 1.0.
*/
protected float[] fractions;
/**
* The color queries of this painter. Each entry in this array corresponds
* to the matching index in the {@link #fractions}, specifying which color
* will be used at the relevant gradient control point. If the constructor
* has not thrown an {@link IllegalArgumentException}, the size of this
* array is identical to the size of {@link #fractions}, and there are no
* null entries in this array. Note that the application code
* can still cause an exception at runtime by throwing it in the
* implementation of the
* {@link ColorSchemeSingleColorQuery#query(SubstanceColorScheme)} method.
*/
protected ColorSchemeSingleColorQuery[] colorQueries;
/**
* Creates a new fraction-based border painter.
*
* @param displayName
* The display name of this painter.
* @param fractions
* The fractions of this painter. Must be strictly increasing,
* starting from 0.0 and ending at 1.0.
* @param colorQueries
* The color queries of this painter. Must have the same size as
* the fractions array, and all entries must be non-
* null.
*/
public FractionBasedPainter(String displayName, float[] fractions,
ColorSchemeSingleColorQuery[] colorQueries) {
this.displayName = displayName;
if ((fractions == null) || (colorQueries == null)) {
throw new IllegalArgumentException("Cannot pass null arguments");
}
if (fractions.length != colorQueries.length) {
throw new IllegalArgumentException("Argument length does not match");
}
int length = fractions.length;
if ((fractions[0] != 0.0f) || (fractions[length - 1] != 1.0f)) {
throw new IllegalArgumentException(
"End fractions must be 0.0 and 1.0");
}
for (int i = 0; i < length - 1; i++) {
if (fractions[i + 1] <= fractions[i]) {
throw new IllegalArgumentException(
"Fractions must be strictly increasing");
}
}
for (int i = 0; i < length; i++) {
if (colorQueries[i] == null) {
throw new IllegalArgumentException("Cannot pass null query");
}
}
this.colorQueries = new ColorSchemeSingleColorQuery[length];
System.arraycopy(colorQueries, 0, this.colorQueries, 0, length);
this.fractions = new float[length];
System.arraycopy(fractions, 0, this.fractions, 0, length);
}
@Override
public String getDisplayName() {
return this.displayName;
}
/**
* Returns the fractions of this painter.
*
* @return Fractions of this painter.
*/
public float[] getFractions() {
float[] result = new float[this.fractions.length];
System.arraycopy(this.fractions, 0, result, 0, this.fractions.length);
return result;
}
/**
* Returns the color queries of this painter.
*
* @return Color queries of this painter.
*/
public ColorSchemeSingleColorQuery[] getColorQueries() {
ColorSchemeSingleColorQuery[] result = new ColorSchemeSingleColorQuery[this.colorQueries.length];
System.arraycopy(this.colorQueries, 0, result, 0,
this.colorQueries.length);
return result;
}
}
