/// <summary>
/// Creates the adorned framework element by searching for a <see cref="DataTemplate"/> that has the same type
/// as the <see cref="AdornerContent"/>.
/// </summary>
private void CreateAdornedFrameworkElementFromDataTemplateInResources()
{
foreach (var resourceDictionary in Application.Current.Resources.MergedDictionaries)
{
foreach (var resource in resourceDictionary.Values.OfType <DataTemplate>())
{
if ((Type)resource.DataType == AdornerContent.GetType())
{
_adornedFrameworkElement = resource.LoadContent() as FrameworkElement;
if (_adornedFrameworkElement != null)
{
_adornedFrameworkElement.DataContext = AdornerContent;
}
}
}
}
}
protected override Size ArrangeOverride(Size finalSize)
{
if (Owner == null || AdornerContent == null)
{
return(finalSize);
}
var element = AdornerContent as FrameworkElement;
if (element == null)
{
return(finalSize);
}
var finalWidth = finalSize.Width.GetRealOrDefault();
var finalHeight = finalSize.Height.GetRealOrDefault();
var desiredWidth = element != null?element.Width.GetRealOrDefault(finalWidth) : finalWidth;
var calculateWidth = !double.IsNaN(Owner.Left) && !double.IsNaN(Owner.Right);
var width = Math.Max(0d, calculateWidth
? finalWidth - Owner.Left - Owner.Right
: desiredWidth);
var desiredHeight = element != null?element.Height.GetRealOrDefault(finalHeight) : finalHeight;
var calculateHeight = !double.IsNaN(Owner.Top) && !double.IsNaN(Owner.Bottom);
var height = Math.Max(0d, calculateHeight
? finalHeight - Owner.Top - Owner.Bottom
: desiredHeight);
var calculateLeft = double.IsNaN(Owner.Left);
var left = calculateLeft
? finalWidth - width - Owner.Right.GetRealOrDefault()
: Owner.Left.GetRealOrDefault();
var calculateTop = double.IsNaN(Owner.Left);
var top = calculateTop
? finalHeight - height - Owner.Bottom.GetRealOrDefault()
: Owner.Top.GetRealOrDefault();
AdornerContent.Arrange(new Rect(left, top, width, height));
return(finalSize);
}
