/// <summary>
/// Heuristic method, based on the assumption that area of element stays the same, when we try to
/// layout it with different available width (available width is between min-width and max-width).
/// </summary>
/// <param name="angle">rotation angle in radians</param>
/// <param name="area">the constant area</param>
/// <param name="elementMinMaxWidth">NOT rotated element min-max-width</param>
/// <param name="availableWidth">the maximum width of area the element will occupy after rotation.</param>
/// <returns>possible min-max-width of element after rotation</returns>
public static iText.Layout.Minmaxwidth.RotationMinMaxWidth Calculate(double angle, double area, MinMaxWidth
elementMinMaxWidth, double availableWidth)
{
RotationMinMaxWidth.WidthFunction function = new RotationMinMaxWidth.WidthFunction(angle, area);
RotationMinMaxWidth.WidthFunction.Interval validArguments = function.GetValidOriginalWidths(availableWidth
);
if (validArguments == null)
{
return(null);
}
double xMin = Math.Max(elementMinMaxWidth.GetMinWidth(), validArguments.GetMin());
double xMax = Math.Min(elementMinMaxWidth.GetMaxWidth(), validArguments.GetMax());
if (xMax < xMin)
{
//Initially the null was returned in this case, but this result in old layout logic that looks worse in most cases.
//The difference between min and max is not that big and not critical.
double rotatedWidth = function.GetRotatedWidth(xMin);
double rotatedHeight = function.GetRotatedHeight(xMin);
return(new iText.Layout.Minmaxwidth.RotationMinMaxWidth(rotatedWidth, rotatedWidth, xMin, xMin, rotatedHeight
, rotatedHeight));
}
return(Calculate(function, xMin, xMax));
}
/// <summary>
/// Heuristic method, based on the assumption that area of element stays the same, when we try to
/// layout it with different available width (available width is between min-width and max-width).
/// </summary>
/// <param name="angle">rotation angle in radians</param>
/// <param name="area">the constant area</param>
/// <param name="elementMinMaxWidth">NOT rotated element min-max-width</param>
/// <returns>possible min-max-width of element after rotation</returns>
public static iText.Layout.Minmaxwidth.RotationMinMaxWidth Calculate(double angle, double area, MinMaxWidth
elementMinMaxWidth)
{
RotationMinMaxWidth.WidthFunction function = new RotationMinMaxWidth.WidthFunction(angle, area);
return(Calculate(function, elementMinMaxWidth.GetMinWidth(), elementMinMaxWidth.GetMaxWidth()));
}