3087-2.cs

protected override Size MeasureOverride(Size availableSize)
{
	// Set it to use whole available width
	var finalSize = new Size { Width = availableSize.Width };
	var columnWidth = availableSize.Width / MaximumColumns;

	var rowHeight = 0d;
	var rowChildCount = 0;
	foreach (var child in Children)
	{
		child.Measure(new Size(columnWidth, availableSize.Height));
		if (rowChildCount < MaximumColumns)
		{
			// Get the talles element in the row to make sure the next row is below all elements on this row
			rowHeight = Math.Max(child.DesiredSize.Height, rowHeight);
		}
		else
		{
			// New row
			finalSize.Height += rowHeight;
			rowHeight = child.DesiredSize.Height;
			rowChildCount = 0;
		}
		rowChildCount++;
	}

	// Add height of last row
	finalSize.Height += rowHeight;
	return finalSize;
}