Method ArrangeOverride

Xaml/Controls/ConstrainedBox.cpp:33–62

	}

	wf::Size ConstrainedBox::ArrangeOverride(wf::Size finalSize)
	{
		// Even though we requested in measure to be a specific size, that doesn't mean our parent
		// panel respected that request. Grid for instance can by default Stretch and if you don't
		// set Horizontal/VerticalAlignment on the control it won't constrain as we expect.
		// We could also be in a StackPanel/ScrollViewer where it wants to provide as much space as possible.
		// However, if we always re-calculate even if we are provided the proper finalSize, this can trigger
		// multiple arrange passes and cause a rounding error in layout. Therefore, we only want to
		// re-calculate if we think we will have a significant impact.
		if (std::abs(finalSize.Width - m_LastMeasuredSize.Width) > CALCULATION_TOLERANCE ||
			std::abs(finalSize.Height - m_LastMeasuredSize.Height) > CALCULATION_TOLERANCE)
		{
			// Check if we can re-use our measure calculation if we're given effectively
			// the same size as we had in the measure step.
			if (std::abs(finalSize.Width - m_OriginalSize.Width) <= CALCULATION_TOLERANCE &&
				std::abs(finalSize.Height - m_OriginalSize.Height) <= CALCULATION_TOLERANCE)
			{
				finalSize = m_LastMeasuredSize;
			}
			else
			{
				CalculateConstrainedSize(finalSize);

				// Copy again so if Arrange is re-triggered we won't re-re-calculate.
				m_LastMeasuredSize = finalSize;
			}
		}

		return base_type::ArrangeOverride(finalSize);
	}

	bool ConstrainedBox::IsPositiveRealNumber(double value) noexcept
	{