/// <summary>
/// Initialize a new empty instance of the <c>Graphmatic.Interaction.Plotting.GraphAxis</c> class from serialized XML data.
/// </summary>
/// <param name="xml">The XML data to use for deserializing this Resource.</param>
public GraphAxis(XElement xml)
{
GridSize = Double.Parse(xml.Element("GridSize").Value);
MajorInterval = Double.Parse(xml.Element("MajorInterval").Value);
HorizontalType = (GraphAxisType)Enum.Parse(typeof(GraphAxisType), xml.Element("HorizontalType").Value);
VerticalType = (GraphAxisType)Enum.Parse(typeof(GraphAxisType), xml.Element("VerticalType").Value);
}
/// <summary>
/// Initialize a new empty instance of the <c>Graphmatic.Interaction.Plotting.GraphAxis</c> class with the specified grid parameters.
/// </summary>
/// <param name="gridSize">The graph-space distance between grid lines.</param>
/// <param name="majorInterval">The interval between major (darker, numbered) grid lines.</param>
public GraphAxis(double gridSize, int majorInterval)
{
GridSize = gridSize;
MajorInterval = majorInterval;
HorizontalType = GraphAxisType.Radians;
VerticalType = GraphAxisType.Radians;
}
/// <summary>
/// Gets the graph label scale for a gixen axis type.
/// <para/>
/// For example, labels in degrees are scaled by a factor of 180/pi, and radians are not scaled.
/// </summary>
/// <param name="axisType">The graph axis type for which to return the scale.</param>
/// <returns>The graph label scale for a gixen axis type.</returns>
public static double AxisTypeLabelScale(this GraphAxisType axisType)
{
switch (axisType)
{
case GraphAxisType.Degrees:
return(180.0 / Math.PI);
case GraphAxisType.Grads:
return(200.0 / Math.PI);
default:
return(1.0);
}
}
/// <summary>
/// Gets the graph label suffix for a given axis type.
/// <para/>
/// For example, degrees have a degree symbol (°) suffix, and radians have none.
/// </summary>
/// <param name="axisType">The graph axis type for which to return the suffix.</param>
/// <returns>The graph label suffix for a given axis type.</returns>
public static string AxisTypeExtension(this GraphAxisType axisType)
{
switch (axisType)
{
case GraphAxisType.Degrees:
return("°");
case GraphAxisType.Grads:
return("g");
default:
return("");
}
}
/// <summary>
/// Gets the graph grid scale for a gixen axis type.
/// <para/>
/// For example, degrees and grads are scaled by a factor of 2*pi/5 to make major intervals line
/// up with the full angle around a circle, and radians are left unscaled.
/// </summary>
/// <param name="axisType">The graph grid type for which to return the scale.</param>
/// <returns>The grid scale for a gixen axis type.</returns>
public static double AxisTypeGridScale(this GraphAxisType axisType)
{
switch (axisType)
{
case GraphAxisType.Degrees:
return(2 * Math.PI / 5);
case GraphAxisType.Grads:
return(2 * Math.PI / 5);
default:
return(1.0);
}
}
