public Rect GetCellBoundsFor(IUIElement uiElement, double xOffset, double yOffset)
{
int firstColumn = uiElement.GridColumn().Clamp(0, _columns.Length - 1);
int columnSpan = uiElement.GridColumnSpan().Clamp(1, _columns.Length - firstColumn);
int lastColumn = firstColumn + columnSpan;
int firstRow = uiElement.GridRow().Clamp(0, _rows.Length - 1);
int rowSpan = uiElement.GridRowSpan().Clamp(1, _rows.Length - firstRow);
int lastRow = firstRow + rowSpan;
double top = TopEdgeOfRow(firstRow);
double left = LeftEdgeOfColumn(firstColumn);
double width = 0;
double height = 0;
for (int n = firstColumn; n < lastColumn; n++)
{
width += _columns[n].Size;
}
for (int n = firstRow; n < lastRow; n++)
{
height += _rows[n].Size;
}
// Account for any space between spanned rows/columns
width += (columnSpan - 1) * _columnSpacing;
height += (rowSpan - 1) * _rowSpacing;
return(new Rect(left + xOffset, top + yOffset, width, height));
}