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using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows;
using System.Windows.Controls;
namespace Notifications.Wpf.Controls
{
public class ReversibleStackPanel : StackPanel
{
public bool ReverseOrder
{
get { return (bool)GetValue(ReverseOrderProperty); }
set { SetValue(ReverseOrderProperty, value); }
}
public static readonly DependencyProperty ReverseOrderProperty =
DependencyProperty.Register("ReverseOrder", typeof(bool), typeof(ReversibleStackPanel), new PropertyMetadata(false));
protected override Size ArrangeOverride(Size arrangeSize)
{
double x = 0;
double y = 0;
IEnumerable<UIElement> children = ReverseOrder ? InternalChildren.Cast<UIElement>().Reverse() : InternalChildren.Cast<UIElement>();
foreach (UIElement child in children)
{
Size size;
if (Orientation == Orientation.Horizontal)
{
size = new Size(child.DesiredSize.Width, Math.Max(arrangeSize.Height, child.DesiredSize.Height));
child.Arrange(new Rect(new Point(x, y), size));
x += size.Width;
}
else
{
size = new Size(Math.Max(arrangeSize.Width, child.DesiredSize.Width), child.DesiredSize.Height);
child.Arrange(new Rect(new Point(x, y), size));
y += size.Height;
}
}
return Orientation == Orientation.Horizontal ? new Size(x, arrangeSize.Height) : new Size(arrangeSize.Width, y);
}
}
}
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