| public static ToDateTime ( object value ) : DateTime | ||
| value | object | The value to convert to a date. |
| return | DateTime | |
/// <summary>
/// Returns the plot area coordinate of a value.
/// </summary>
/// <param name="value">The value to plot.</param>
/// <param name="currentRange">The range to use determine the coordinate.</param>
/// <param name="length">The length of the axis.</param>
/// <returns>The plot area coordinate of a value.</returns>
private static UnitValue GetPlotAreaCoordinate(object value, Range <DateTime> currentRange, double length)
{
if (currentRange.HasData)
{
DateTime dateTimeValue = ValueHelper.ToDateTime(value);
double rangelength = currentRange.Maximum.Ticks - currentRange.Minimum.Ticks;
double pixelLength = Math.Max(length - 1, 0);
return(new UnitValue((dateTimeValue.Ticks - currentRange.Minimum.Ticks) * (pixelLength / rangelength), Unit.Pixels));
}
return(UnitValue.NaN());
}
protected override Range <IComparable> IRangeProviderGetRange(IRangeConsumer rangeConsumer)
{
if (rangeConsumer == ActualDependentAxis)
{
var dependentValuesByIndependentValue = IndependentValueDependentValues.Select(e => e.ToArray()).ToArray();
var mostNegative = dependentValuesByIndependentValue
.Select(g => g.Where(v => v < 0)
.Sum())
.Where(v => v < 0)
.ToArray();
var leastNegative = dependentValuesByIndependentValue
.Select(g => g.Where(v => v <= 0)
.DefaultIfEmpty(1.0)
.First())
.Where(v => v <= 0)
.ToArray();
var mostPositive = dependentValuesByIndependentValue
.Select(g => g.Where(v => 0 < v)
.Sum())
.Where(v => 0 < v)
.ToArray();
var leastPositive = dependentValuesByIndependentValue
.Select(g => g.Where(v => 0 <= v)
.DefaultIfEmpty(-1.0)
.First())
.Where(v => 0 <= v)
.ToArray();
// Compute minimum
double minimum = 0;
if (mostNegative.Any())
{
minimum = mostNegative.Min();
}
else if (leastPositive.Any())
{
minimum = leastPositive.Min();
}
// Compute maximum
double maximum = 0;
if (mostPositive.Any())
{
maximum = mostPositive.Max();
}
else if (leastNegative.Any())
{
maximum = leastNegative.Max();
}
if (IsStacked100)
{
minimum = Math.Min(minimum, 0);
maximum = Math.Max(maximum, 0);
}
return(new Range <IComparable>(minimum, maximum));
}
else if (rangeConsumer == ActualIndependentAxis)
{
// Using a non-ICategoryAxis for the independent axis
// Need to specifically adjust for slot size of bars/columns so they don't overlap
// Note: Calculation for slotSize is not perfect, but it's quick, close, and errs on the safe side
Range <IComparable> range = base.IRangeProviderGetRange(rangeConsumer);
int count = Math.Max(IndependentValueGroups.Count(), 1);
if (ActualIndependentAxis.CanPlot(0.0))
{
double minimum = ValueHelper.ToDouble(range.Minimum);
double maximum = ValueHelper.ToDouble(range.Maximum);
double slotSize = (maximum - minimum) / count;
return(new Range <IComparable>(minimum - slotSize, maximum + slotSize));
}
else
{
DateTime minimum = ValueHelper.ToDateTime(range.Minimum);
DateTime maximum = ValueHelper.ToDateTime(range.Maximum);
TimeSpan slotSize = TimeSpan.FromTicks((maximum - minimum).Ticks / count);
return(new Range <IComparable>(minimum - slotSize, maximum + slotSize));
}
}
else
{
return(base.IRangeProviderGetRange(rangeConsumer));
}
}
protected override Range <IComparable> OverrideDataRange(Range <IComparable> range)
{
Range <IComparable> overriddenActualRange = range;
if (!overriddenActualRange.HasData)
{
int year = DateTime.Now.Year;
return(new Range <IComparable>(new DateTime(year, 1, 1), new DateTime(year + 1, 1, 1)));
}
else if (ValueHelper.Compare(overriddenActualRange.Minimum, overriddenActualRange.Maximum) == 0)
{
DateTime minimum = ValueHelper.ToDateTime(overriddenActualRange.Minimum);
DateTime midpoint = ((DateTime.MinValue == minimum) ? DateTime.Now : minimum).Date;
return(new Range <IComparable>(midpoint.AddMonths(-6), midpoint.AddMonths(6)));
}
// ActualLength of 1.0 or less maps all points to the same coordinate
if (range.HasData && this.ActualLength > 1.0)
{
IList <ValueMarginCoordinateAndOverlap> valueMargins = new List <ValueMarginCoordinateAndOverlap>();
foreach (ValueMargin valueMargin in
this.RegisteredListeners
.OfType <IValueMarginProvider>()
.SelectMany(provider => provider.GetValueMargins(this)))
{
valueMargins.Add(
new ValueMarginCoordinateAndOverlap
{
ValueMargin = valueMargin,
});
}
if (valueMargins.Count > 0)
{
double maximumPixelMarginLength =
valueMargins
.Select(valueMargin => valueMargin.ValueMargin.LowMargin + valueMargin.ValueMargin.HighMargin)
.MaxOrNullable().Value;
// Requested margin is larger than the axis so give up
// trying to find a range that will fit it.
if (maximumPixelMarginLength > this.ActualLength)
{
return(range);
}
Range <DateTime> currentRange = range.ToDateTimeRange();
// Ensure range is not empty.
if (currentRange.Minimum == currentRange.Maximum)
{
int year = DateTime.Now.Year;
currentRange = new Range <DateTime>(new DateTime(year, 1, 1), new DateTime(year + 1, 1, 1));
}
// priming the loop
double actualLength = this.ActualLength;
ValueMarginCoordinateAndOverlap maxLeftOverlapValueMargin;
ValueMarginCoordinateAndOverlap maxRightOverlapValueMargin;
UpdateValueMargins(valueMargins, currentRange.ToComparableRange());
GetMaxLeftAndRightOverlap(valueMargins, out maxLeftOverlapValueMargin, out maxRightOverlapValueMargin);
while (maxLeftOverlapValueMargin.LeftOverlap > 0 || maxRightOverlapValueMargin.RightOverlap > 0)
{
long unitOverPixels = currentRange.GetLength().Value.Ticks / ((long)actualLength);
DateTime newMinimum = new DateTime(currentRange.Minimum.Ticks - (long)((maxLeftOverlapValueMargin.LeftOverlap + 0.5) * unitOverPixels));
DateTime newMaximum = new DateTime(currentRange.Maximum.Ticks + (long)((maxRightOverlapValueMargin.RightOverlap + 0.5) * unitOverPixels));
currentRange = new Range <DateTime>(newMinimum, newMaximum);
UpdateValueMargins(valueMargins, currentRange.ToComparableRange());
GetMaxLeftAndRightOverlap(valueMargins, out maxLeftOverlapValueMargin, out maxRightOverlapValueMargin);
}
return(currentRange.ToComparableRange());
}
}
return(range);
}