2018-07-15 18:12:02 +00:00
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using System;
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using System.Collections;
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using System.Collections.Generic;
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using System.ComponentModel;
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2020-10-18 18:02:39 +00:00
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using System.Globalization;
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2018-07-15 18:12:02 +00:00
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using System.Reflection;
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2022-06-18 18:04:24 +00:00
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namespace PKHeX.WinForms;
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public sealed class PropertyComparer<T> : IComparer<T> where T : class
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2018-07-15 18:12:02 +00:00
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{
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2022-06-18 18:04:24 +00:00
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private readonly IComparer comparer;
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private PropertyDescriptor propertyDescriptor;
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private int reverse;
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public PropertyComparer(PropertyDescriptor property, ListSortDirection direction)
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{
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propertyDescriptor = property;
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Type comparerForPropertyType = typeof(Comparer<>).MakeGenericType(property.PropertyType);
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var ci = comparerForPropertyType.InvokeMember("Default", BindingFlags.Static | BindingFlags.GetProperty | BindingFlags.Public, null, null, null);
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comparer = ci == null ? new Comparer(CultureInfo.InvariantCulture) : (IComparer) ci;
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SetListSortDirection(direction);
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}
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#region IComparer<T> Members
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public int Compare(T? x, T? y)
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{
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if (x == null) throw new ArgumentNullException(nameof(x));
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if (y == null) throw new ArgumentNullException(nameof(y));
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return reverse * comparer.Compare(propertyDescriptor.GetValue(x), propertyDescriptor.GetValue(y));
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}
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#endregion
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private void SetPropertyDescriptor(PropertyDescriptor descriptor)
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{
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propertyDescriptor = descriptor;
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}
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private void SetListSortDirection(ListSortDirection direction)
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{
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reverse = direction == ListSortDirection.Ascending ? 1 : -1;
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}
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public void SetPropertyAndDirection(PropertyDescriptor descriptor, ListSortDirection direction)
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2018-07-15 18:12:02 +00:00
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{
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2022-06-18 18:04:24 +00:00
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SetPropertyDescriptor(descriptor);
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SetListSortDirection(direction);
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2018-07-15 18:12:02 +00:00
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}
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2022-06-18 18:04:24 +00:00
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}
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