Opacity.cs

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namespace IDSImaging.Peak.ICV.Painting;
 
public class Opacity
{
    private uint _value = Maximum;
 
    public Opacity() : this(Maximum)
    {
    }
 
    public Opacity(uint value)
    {
        Value = value; // validation handled in property setter
    }
 
    public static uint Minimum { get; } = 0;
 
    public static uint Maximum { get; } = 100;
 
    public uint Value
    {
        get => _value;
        set
        {
            if (value > Maximum)
            {
                throw new IcvOutOfRangeException(
                    $"The given opacity {value} is out of range. The opacity value has to be within the range of {Minimum} and {Maximum}.");
            }
 
            _value = value;
        }
    }
 
    public static IEqualityComparer<Opacity> Comparer { get; } = new OpacityEqualityComparer();
 
    public override string ToString()
    {
        return Value.ToString();
    }
 
    private sealed class OpacityEqualityComparer : IEqualityComparer<Opacity>
    {
        public bool Equals(Opacity x, Opacity y)
        {
            if (ReferenceEquals(x, y))
            {
                return true;
            }
 
            if (ReferenceEquals(x, null))
            {
                return false;
            }
 
            if (ReferenceEquals(y, null))
            {
                return false;
            }
 
            return x._value.Equals(y._value);
        }
 
        public int GetHashCode(Opacity obj)
        {
            return obj._value.GetHashCode();
        }
    }
}