PKHeX/PKHeX.WinForms/Subforms/Misc/PropertyComparer.cs
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2019-10-03 19:09:02 -07:00

48 lines
No EOL
1.5 KiB
C#

using System;
using System.Collections;
using System.Collections.Generic;
using System.ComponentModel;
using System.Reflection;
namespace PKHeX.WinForms
{
public sealed class PropertyComparer<T> : IComparer<T>
{
private readonly IComparer comparer;
private PropertyDescriptor propertyDescriptor;
private int reverse;
public PropertyComparer(PropertyDescriptor property, ListSortDirection direction)
{
propertyDescriptor = property;
Type comparerForPropertyType = typeof(Comparer<>).MakeGenericType(property.PropertyType);
comparer = (IComparer)comparerForPropertyType.InvokeMember("Default", BindingFlags.Static | BindingFlags.GetProperty | BindingFlags.Public, null, null, null);
SetListSortDirection(direction);
}
#region IComparer<T> Members
public int Compare(T x, T y)
{
return reverse * comparer.Compare(propertyDescriptor.GetValue(x), propertyDescriptor.GetValue(y));
}
#endregion
private void SetPropertyDescriptor(PropertyDescriptor descriptor)
{
propertyDescriptor = descriptor;
}
private void SetListSortDirection(ListSortDirection direction)
{
reverse = direction == ListSortDirection.Ascending ? 1 : -1;
}
public void SetPropertyAndDirection(PropertyDescriptor descriptor, ListSortDirection direction)
{
SetPropertyDescriptor(descriptor);
SetListSortDirection(direction);
}
}
}