/// <summary>
/// Creates the appropriate OpenGLDrawingProvider from a file string
/// </summary>
/// <param name="providerFileString">The file string to parse</param>
/// <returns>The OpenGLDrawingProvider</returns>
public static IOpenGLDrawingProvider InstantiateFromString(string providerFileString)
{
//The elements in the provider file-strings are separated by semicolons
string[] providerElements = providerFileString.Split(';');
if (providerElements.Length < 1)
{
throw new ApplicationException("String does not represent an OpenGLDrawingProvider");
}
else if (providerElements.Length == 1)
{
//this may be an empty provider!
if (providerElements[0] == "?")
{
return(null);
}
else
{
throw new ApplicationException("String does not represent an OpenGLDrawingProvider");
}
}
//Check which provider we are dealing with, instantiate it and let it populate itself
IOpenGLDrawingProvider retval;
switch (providerElements[0])
{
case "OneColor":
retval = new OneColorProvider();
retval.FromFileString(providerFileString);
return(retval);
case "FourSquare":
retval = new FourSquareProvider();
retval.FromFileString(providerFileString);
return(retval);
case "Circle":
retval = new CircleProvider();
retval.FromFileString(providerFileString);
return(retval);
case "LinGrad":
retval = new LinGradientProvider();
retval.FromFileString(providerFileString);
return(retval);
default:
throw new ApplicationException("Could not recognize drawing provider");
}
}
