/// <summary>
/// Converts a value to the given <see cref="GraphicalUnit"/> (to) based on the given <see cref="GraphicalUnit"/> (from).
/// </summary>
/// <param name="value">Number of units.</param>
/// <param name="from">The unit to convert from.</param>
/// <param name="to">The unit to convert to.</param>
/// <param name="ppi">Pixels per inch.</param>
public static double Convert(this double value, GraphicalUnit from, GraphicalUnit to, double ppi = 72.0)
{
var pixels = 0d;
switch (from)
{
case GraphicalUnit.Pixel:
pixels = System.Math.Round(value, 0);
break;
case GraphicalUnit.Inch:
pixels = System.Math.Round(value * ppi, 0);
break;
case GraphicalUnit.Centimeter:
pixels = System.Math.Round((value * ppi) / 2.54, 0);
break;
case GraphicalUnit.Millimeter:
pixels = System.Math.Round((value * ppi) / 25.4, 0);
break;
case GraphicalUnit.Point:
pixels = System.Math.Round((value * ppi) / 72, 0);
break;
case GraphicalUnit.Pica:
pixels = System.Math.Round((value * ppi) / 6, 0);
break;
case GraphicalUnit.Twip:
pixels = System.Math.Round((value * ppi) / 1140, 0);
break;
case GraphicalUnit.Character:
pixels = System.Math.Round((value * ppi) / 12, 0);
break;
case GraphicalUnit.En:
pixels = System.Math.Round((value * ppi) / 144.54, 0);
break;
}
var inches = pixels / ppi;
var result = pixels;
switch (to)
{
case GraphicalUnit.Inch:
result = inches;
break;
case GraphicalUnit.Centimeter:
result = inches * 2.54;
break;
case GraphicalUnit.Millimeter:
result = inches * 25.4;
break;
case GraphicalUnit.Point:
result = inches * 72.0;
break;
case GraphicalUnit.Pica:
result = inches * 6.0;
break;
case GraphicalUnit.Twip:
result = inches * 1140.0;
break;
case GraphicalUnit.Character:
result = inches * 12.0;
break;
case GraphicalUnit.En:
result = inches * 144.54;
break;
}
return(result);
}
/// <summary>
/// Converts a graphical unit value to another graphical unit value.
/// </summary>
/// <param name="Value">Number of units.</param>
/// <param name="From">The unit to convert from.</param>
/// <param name="To">The unit to convert to.</param>
/// <param name="Ppi">Pixels per inch.</param>
/// <param name="RoundTo">Decimal places to round to.</param>
public static double ToUnit(this double Value, GraphicalUnit From, GraphicalUnit To, double Ppi = 72.0)
{
//Convert to pixels
double Pixels = 0.0;
switch (From)
{
case GraphicalUnit.Pixel:
Pixels = Math.Round(Value, 0);
break;
case GraphicalUnit.Inch:
Pixels = Math.Round(Value * Ppi, 0);
break;
case GraphicalUnit.Centimeter:
Pixels = Math.Round((Value * Ppi) / 2.54, 0);
break;
case GraphicalUnit.Millimeter:
Pixels = Math.Round((Value * Ppi) / 25.4, 0);
break;
case GraphicalUnit.Point:
Pixels = Math.Round((Value * Ppi) / 72, 0);
break;
case GraphicalUnit.Pica:
Pixels = Math.Round((Value * Ppi) / 6, 0);
break;
case GraphicalUnit.Twip:
Pixels = Math.Round((Value * Ppi) / 1140, 0);
break;
case GraphicalUnit.Character:
Pixels = Math.Round((Value * Ppi) / 12, 0);
break;
case GraphicalUnit.En:
Pixels = Math.Round((Value * Ppi) / 144.54, 0);
break;
}
double Inches = Pixels / Ppi;
double Result = Pixels;
//Convert to target unit
switch (To)
{
case GraphicalUnit.Inch:
Result = Inches;
break;
case GraphicalUnit.Centimeter:
Result = Inches * 2.54;
break;
case GraphicalUnit.Millimeter:
Result = Inches * 25.4;
break;
case GraphicalUnit.Point:
Result = Inches * 72.0;
break;
case GraphicalUnit.Pica:
Result = Inches * 6.0;
break;
case GraphicalUnit.Twip:
Result = Inches * 1140.0;
break;
case GraphicalUnit.Character:
Result = Inches * 12.0;
break;
case GraphicalUnit.En:
Result = Inches * 144.54;
break;
}
return(Result);
}
