org.eclipse.jface.resource.RGBColorDescriptor Maven / Gradle / Ivy
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/*******************************************************************************
* Copyright (c) 2004, 2015 IBM Corporation and others.
*
* This program and the accompanying materials
* are made available under the terms of the Eclipse Public License 2.0
* which accompanies this distribution, and is available at
* https://www.eclipse.org/legal/epl-2.0/
*
* SPDX-License-Identifier: EPL-2.0
*
* Contributors:
* IBM Corporation - initial API and implementation
*******************************************************************************/
package org.eclipse.jface.resource;
import org.eclipse.swt.graphics.Color;
import org.eclipse.swt.graphics.Device;
import org.eclipse.swt.graphics.RGB;
/**
* Describes a color by its RGB values.
*
* @since 3.1
*/
class RGBColorDescriptor extends ColorDescriptor {
private final RGB color;
/**
* Color being copied, or null if none
*/
private final Color originalColor;
/**
* Creates a new RGBColorDescriptor given some RGB values
*
* @param color RGB values (not null)
*/
public RGBColorDescriptor(RGB color) {
this.color = color;
this.originalColor = null;
}
/**
* Creates a new RGBColorDescriptor that describes an existing color.
*
* @since 3.1
*
* @param originalColor a color to describe
*/
public RGBColorDescriptor(Color originalColor) {
this.color = originalColor.getRGB();
this.originalColor = originalColor;
}
@Override
public boolean equals(Object obj) {
return obj instanceof RGBColorDescriptor other //
&& other.color.equals(color) && other.originalColor == originalColor;
}
@Override
public int hashCode() {
return color.hashCode();
}
@Override
public Color createColor(Device device) {
// If this descriptor is wrapping an existing color, then we can return the original color
// if this is the same device.
if (originalColor != null && originalColor.getDevice() == device) {
// If we're allocating on the same device as the original color, return the original.
return originalColor;
}
return new Color(device, color);
}
}