private float GetInchesFromRuler(float pixels, bool fromRight, bool useBounds, bool useActualBounds)
{
float inches = fromRight ?
ConvertEx.PixelsToInches(GetActualRulerRightPixel() - pixels, _Dpi) :
ConvertEx.PixelsToInches(pixels - Padding.Left, _Dpi);
if (SnapToRuler)
{
const float rulerStep = (1f / RulerSteps);
float remainder = inches % rulerStep;
if (remainder != 0)
{
const float halfStep = rulerStep / 2;
inches = (inches - remainder) + (remainder > halfStep ? rulerStep : 0);
}
}
if (useBounds)
{
float maxInches = useActualBounds ? GetActualRulerLength() : _RulerLength;
if (inches < 0)
{
inches = 0;
}
else if (inches > maxInches)
{
inches = maxInches;
}
}
return(inches);
}
public void PixelsToInchesTest()
{
const float expected = 1F;
float actual = ConvertEx.PixelsToInches(DPI, DPI);
Assert.AreEqual(expected, actual);
}
