/// <summary>
/// Sets the instance of <see cref="GdiFontManager"/> here in this class (used by the static methods of this class).
/// </summary>
/// <param name="newInstance">The new instance.</param>
public static void SetInstance(GdiFontManager newInstance)
{
var oldInstance = _instance;
if (!object.ReferenceEquals(oldInstance, newInstance))
{
_instance = newInstance;
oldInstance?.Dispose();
}
}
} // end of function DoPaint
public static FontX GetDefaultFont(Altaxo.Main.Properties.IReadOnlyPropertyBag context)
{
if (null != context)
{
return(context.GetValue(PropertyKeyDefaultFont));
}
else
{
return(GdiFontManager.GetFontX(GdiFontManager.GenericSansSerifFontFamilyName, 18, FontXStyle.Regular));
}
}
/// <summary>
/// Gets the default major tick length for all graphics in this graph, using the provided property context.
/// </summary>
/// <param name="context">The property context.</param>
/// <returns>Default major tick length in points (1/72 inch).</returns>
public static double GetDefaultMajorTickLength(Altaxo.Main.Properties.IReadOnlyPropertyBag context)
{
double result = 8;
if (null != context)
{
var font = context.GetValue(PropertyKeyDefaultFont);
using (var path = new GraphicsPath())
{
path.AddString("0", GdiFontManager.ToGdi(font).FontFamily, (int)font.Style, (float)font.Size, new PointF(0, 0), StringFormat.GenericTypographic);
var bounds = path.GetBounds();
if (bounds.Width > 0)
{
result = 2 * Calc.Rounding.RoundToNumberOfSignificantDigits(bounds.Width / 2, 2, MidpointRounding.ToEven);
}
}
}
return(result);
}
