workgroupengineering
4 years ago
committed by
GitHub
GitHub
11 changed files with 330 additions and 145 deletions
@ -1,53 +0,0 @@ |
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using System; |
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using System.Globalization; |
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using Avalonia.Data.Converters; |
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namespace Avalonia.Controls.Primitives.Converters |
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{ |
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/// <summary>
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/// Gets the third <see cref="ColorComponent"/> corresponding with a given
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/// <see cref="ColorSpectrumComponents"/> that represents the other two components.
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/// </summary>
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/// <remarks>
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/// This is a highly-specialized converter for the color picker.
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/// </remarks>
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public class ThirdComponentConverter : IValueConverter |
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{ |
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/// <inheritdoc/>
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public object? Convert( |
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object? value, |
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Type targetType, |
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object? parameter, |
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CultureInfo culture) |
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{ |
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if (value is ColorSpectrumComponents components) |
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{ |
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// Note: Alpha is not relevant here
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switch (components) |
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{ |
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case ColorSpectrumComponents.HueSaturation: |
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case ColorSpectrumComponents.SaturationHue: |
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return (ColorComponent)HsvComponent.Value; |
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case ColorSpectrumComponents.HueValue: |
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case ColorSpectrumComponents.ValueHue: |
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return (ColorComponent)HsvComponent.Saturation; |
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case ColorSpectrumComponents.SaturationValue: |
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case ColorSpectrumComponents.ValueSaturation: |
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return (ColorComponent)HsvComponent.Hue; |
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} |
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} |
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return AvaloniaProperty.UnsetValue; |
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} |
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/// <inheritdoc/>
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public object? ConvertBack( |
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object? value, |
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Type targetType, |
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object? parameter, |
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CultureInfo culture) |
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{ |
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return AvaloniaProperty.UnsetValue; |
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} |
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} |
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} |
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@ -0,0 +1,71 @@ |
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namespace Avalonia.Controls.Primitives |
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{ |
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/// <summary>
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/// A thin wrapper over an <see cref="System.Array"/> that allows some additional list-like functionality.
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/// </summary>
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/// <remarks>
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/// This is only for internal ColorPicker-related functionality and should not be used elsewhere.
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/// It is added for performance to enjoy the simplicity of the IList.Add() method without requiring
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/// an additional copy to turn a list into an array for bitmaps.
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/// </remarks>
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/// <typeparam name="T">The type of items in the array.</typeparam>
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internal class ArrayList<T> |
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{ |
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private int _nextIndex = 0; |
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/// <summary>
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/// Initializes a new instance of the <see cref="ArrayList{T}"/> class.
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/// </summary>
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public ArrayList(int capacity) |
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{ |
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Capacity = capacity; |
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Array = new T[capacity]; |
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} |
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/// <summary>
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/// Provides access to the underlying array by index.
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/// This exists for simplification and the <see cref="Array"/> property
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/// may also be used.
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/// </summary>
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/// <param name="i">The index of the item to get or set.</param>
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/// <returns>The item at the given index.</returns>
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public T this[int i] |
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{ |
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get => Array[i]; |
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set => Array[i] = value; |
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} |
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/// <summary>
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/// Gets the underlying array.
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/// </summary>
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public T[] Array { get; private set; } |
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/// <summary>
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/// Gets the fixed capacity/size of the array.
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/// This must be set during construction.
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/// </summary>
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public int Capacity { get; private set; } |
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/// <summary>
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/// Adds the given item to the array at the next available index.
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/// WARNING: This must be used carefully and only once, in sequence.
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/// </summary>
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/// <param name="item">The item to add.</param>
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public void Add(T item) |
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{ |
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if (_nextIndex >= 0 && |
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_nextIndex < Capacity) |
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{ |
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Array[_nextIndex] = item; |
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_nextIndex++; |
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} |
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else |
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{ |
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// If necessary an exception could be thrown here
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// throw new IndexOutOfRangeException();
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} |
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return; |
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} |
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} |
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} |
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