mirror of https://github.com/mhowlett/nplot.git
115 lines
4.0 KiB
C#
115 lines
4.0 KiB
C#
/*
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* NPlot - A charting library for .NET
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*
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* StepGradient.cs
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* Copyright (C) 2003-2006 Matt Howlett and others.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
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* INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System.Drawing;
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namespace NPlot
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{
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/// <summary>
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/// Class for creating a rainbow legend.
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/// </summary>
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public class StepGradient : IGradient
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{
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/// <summary>
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/// Types of step gradient defined.
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/// </summary>
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public enum Type
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{
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/// <summary>
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/// Rainbow gradient type (colors of the rainbow)
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/// </summary>
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Rainbow,
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/// <summary>
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/// RGB gradient type (red, green blud).
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/// </summary>
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RGB
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}
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private Type stepType_ = Type.RGB;
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/// <summary>
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/// Default Constructor
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/// </summary>
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public StepGradient()
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{
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}
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/// <summary>
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/// Constructor
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/// </summary>
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/// <param name="stepType">type of gradient</param>
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public StepGradient(Type stepType)
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{
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stepType_ = stepType;
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}
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/// <summary>
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/// Sets the type of step gradient.
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/// </summary>
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public Type StepType
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{
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get { return stepType_; }
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set { stepType_ = value; }
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}
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/// <summary>
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/// Gets a color corresponding to a number between 0.0 and 1.0 inclusive. The color will
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/// be a linear interpolation of the min and max colors.
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/// </summary>
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/// <param name="prop">the number to get corresponding color for (between 0.0 and 1.0)</param>
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/// <returns>The color corresponding to the supplied number.</returns>
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public Color GetColor(double prop)
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{
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switch (stepType_)
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{
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case Type.RGB:
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{
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if (prop < 1.0/3.0) return Color.Red;
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if (prop < 2.0/3.0) return Color.Green;
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return Color.Blue;
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}
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case Type.Rainbow:
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{
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if (prop < 0.125) return Color.Red;
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if (prop < 0.25) return Color.Orange;
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if (prop < 0.375) return Color.Yellow;
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if (prop < 0.5) return Color.Green;
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if (prop < 0.625) return Color.Cyan;
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if (prop < 0.75) return Color.Blue;
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if (prop < 0.825) return Color.Purple;
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return Color.Pink;
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}
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default:
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{
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return Color.Black;
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}
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}
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}
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}
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} |