/// <summary>
/// Defines the template for core-level arrange layout definition.
/// </summary>
/// <remarks>
/// In WPF this method is defined on UIElement as protected virtual and has a base implementation.
/// FrameworkElement (which derrives from UIElement) creates a sealed implemention, similar to the below,
/// which discards UIElement's base implementation.
/// </remarks>
/// <param name = "finalRect">The final area within the parent that element should use to arrange itself and its child elements.</param>
private void ArrangeCore(BoundingRectangle finalRect)
{
Thickness margin = this.Margin;
Vector2 unclippedDesiredSize = isClippingRequired ? unclippedSize : DesiredSize.Deflate(margin);
Vector2 finalSize = new Vector2(finalRect.Width, finalRect.Height);
finalSize = finalSize.Deflate(margin);
isClippingRequired = false;
if (finalSize.X < unclippedDesiredSize.X)
{
isClippingRequired = true;
finalSize.X = unclippedDesiredSize.X;
}
if (finalSize.Y < unclippedDesiredSize.Y)
{
isClippingRequired = true;
finalSize.Y = unclippedDesiredSize.Y;
}
if (HorizontalAlignment != HorizontalAlignment.Stretch)
{
finalSize.X = unclippedDesiredSize.X;
}
if (VerticalAlignment != VerticalAlignment.Stretch)
{
finalSize.Y = unclippedDesiredSize.Y;
}
var minMax = new MinMax(this);
float largestWidth = Math.Max(unclippedDesiredSize.X, minMax.MaxWidth);
if (largestWidth < finalSize.X)
{
finalSize.X = largestWidth;
}
float largestHeight = Math.Max(unclippedDesiredSize.Y, minMax.MaxHeight);
if (largestHeight < finalSize.Y)
{
finalSize.Y = largestHeight;
}
Vector2 renderSize = this.ArrangeOverride(finalSize);
this.RenderSize = renderSize;
Vector2 inkSize = new Vector2(
Math.Min(renderSize.X, minMax.MaxWidth), Math.Min(renderSize.Y, minMax.MaxHeight));
isClippingRequired |= inkSize.X < renderSize.X || inkSize.Y < renderSize.Y;
Vector2 clientSize = finalRect.Size.Deflate(margin);
isClippingRequired |= clientSize.X < inkSize.X || clientSize.Y < inkSize.Y;
Vector2 offset = this.ComputeAlignmentOffset(clientSize, inkSize);
offset.X += finalRect.X + margin.Left;
offset.Y += finalRect.Y + margin.Top;
this.visualOffset = offset;
}
