/// <summary>
/// Calculates the width of the child desired.
/// </summary>
/// <param name="child">The child.</param>
/// <param name="parentColumn">The parent column.</param>
/// <param name="finalSize">The final size.</param>
/// <returns>Tuple{System.DoubleSizeSystem.Boolean}.</returns>
private Tuple<double, Size, bool> CalculateChildDesiredWidth(ContentPresenter child, IColumn parentColumn, Size finalSize)
{
var childDesiredWidth = child.DesiredSize.Width;
var finalSizeResult = finalSize;
var desiredWidthCorrected = false;
var lastChild = Children.Last();
if (child.Equals(lastChild) && IsOutermost(child))
{
var permissibleWidth = 0.0;
if (parentColumn == null)
{
var topLevelColumn = child.Content as IColumn;
if (topLevelColumn != null)
{
var owner = topLevelColumn.Owner;
if (owner != null && owner.IsTopLevel)
permissibleWidth = owner.CalculateSpreadsheetWidth();
}
}
var totalDesiredWidth = Children.Sum(x => x.DesiredSize.Width);
if (totalDesiredWidth < permissibleWidth)
{
if (child.DesiredSize.Width.Equals(child.RenderSize.Width))
{
var delta = permissibleWidth - totalDesiredWidth;
childDesiredWidth = child.DesiredSize.Width + delta;
finalSize.Width += delta;
}
else
{
childDesiredWidth = child.RenderSize.Width;
finalSize.Width += (child.RenderSize.Width - child.DesiredSize.Width);
}
var column = child.Content as IColumn;
if (column != null)
column.Width = childDesiredWidth;
desiredWidthCorrected = true;
}
}
return Tuple.Create(childDesiredWidth, finalSizeResult, desiredWidthCorrected);
}