Method GetDimensions

Xaml/Controls/UniformGrid.cpp:177–226

	}

	std::tuple<int, int> UniformGrid::GetDimensions(const std::vector<wux::FrameworkElement> &visible, int rows, int cols, int firstColumn)
	{
		// If a dimension isn't specified, we need to figure out the other one (or both).
		if (rows == 0 || cols == 0)
		{
			// Calculate the size & area of all objects in the grid to know how much space we need.
			const auto sizes = visible | std::views::transform([](const wux::FrameworkElement &item)
			{
				return composable_base::GetRowSpan(item) * composable_base::GetColumnSpan(item);
			});

			auto count = std::max(1, std::accumulate(sizes.begin(), sizes.end(), 0));

			if (rows == 0)
			{
				if (cols > 0)
				{
					// Bound check
					const auto first = (firstColumn >= cols || firstColumn < 0) ? 0 : firstColumn;

					// If we have columns but no rows, calculate rows based on column offset and number of children.
					rows = (count + first + (cols - 1)) / cols;
					return { rows, cols };
				}
				else
				{
					// Otherwise, determine square layout if both are zero.
					const auto size = static_cast<int>(std::ceil(std::sqrt(count)));

					// Figure out if firstColumn is in bounds
					const auto first = (firstColumn >= size || firstColumn < 0) ? 0 : firstColumn;

					rows = static_cast<int>(std::ceil(std::sqrt(count + first)));
					return { rows, rows };
				}
			}
			else if (cols == 0)
			{
				// If we have rows and no columns, then calculate columns needed based on rows
				cols = (count + (rows - 1)) / rows;

				// Now that we know a rough size of our shape, see if the FirstColumn effects that:
				const auto first = (firstColumn >= cols || firstColumn < 0) ? 0 : firstColumn;

				cols = (count + first + (rows - 1)) / rows;
			}
		}

		return { rows, cols };
	}

	void UniformGrid::SetupRowDefinitions(uint32_t rows)
	{