internal override void PlotCore(AxisUpdateContext context)
{
int count = this.categories.Count;
if (count == 0)
{
return;
}
double step = this.CalculateRelativeStep(count);
double value = 0;
double gap = this.GapLength * step;
double length = step - gap;
double offset = this.actualPlotMode == AxisPlotMode.OnTicks ? 0 : step / 2;
double position;
for (int i = 0; i < count; i++)
{
AxisCategory category = this.categories[i];
position = this.IsInverse ? 1 - value - offset : value + offset;
foreach (DataPoint point in category.Points)
{
CategoricalAxisPlotInfo info = CategoricalAxisPlotInfo.Create(this, value);
info.CategoryKey = category.KeySource;
info.Position = position;
info.Length = length;
point.SetValueFromAxis(this, info);
}
value += step;
}
}
private AxisCategory CreateCategory(object key, object keySource)
{
AxisCategory category = new AxisCategory()
{
Key = key, KeySource = keySource
};
this.categories.Add(category);
return(category);
}
internal override object ConvertPhysicalUnitsToData(double coordinate, RadRect axisVirtualSize)
{
int categoriesCount = this.categories.Count;
if (!this.isUpdated || categoriesCount == 0)
{
return(null);
}
double step = this.CalculateRelativeStep(categoriesCount);
double stepOffset = this.actualPlotMode == AxisPlotMode.OnTicks ? 0.5 * step : 0;
double relativePosition = this.CalculateRelativePosition(coordinate, axisVirtualSize, stepOffset);
int categoryIndex = (int)(relativePosition / step);
if (categoryIndex < 0 || categoryIndex > categoriesCount - 1)
{
return(null);
}
AxisCategory category = this.categories[categoryIndex];
return(category.KeySource);
}
internal override AxisPlotInfo CreatePlotInfo(object value)
{
for (int index = 0; index < this.categories.Count; index++)
{
AxisCategory category = this.categories[index];
if (object.Equals(category.KeySource, value))
{
double step = this.CalculateRelativeStep(this.categories.Count);
double gap = this.GapLength * step;
double length = step - gap;
double valueLength = index * step;
double offset = this.actualPlotMode == AxisPlotMode.OnTicks ? 0 : step / 2;
CategoricalAxisPlotInfo info = CategoricalAxisPlotInfo.Create(this, valueLength);
info.CategoryKey = value;
info.Position = this.IsInverse ? 1 - valueLength - offset : valueLength + offset;
info.Length = length;
return(info);
}
}
return(null);
}
