| public static Compare ( IComparable left, IComparable right ) : int | ||
| left | IComparable | The left comparable. |
| right | IComparable | The right comparable. |
| return | int | |
/// <summary>
/// Modifies a range to respect the minimum and maximum axis values.
/// </summary>
/// <param name="range">The range of data.</param>
/// <returns>A range modified to respect the minimum and maximum axis
/// values.</returns>
private Range <IComparable> EnforceMaximumAndMinimum(Range <IComparable> range)
{
if (range.HasData)
{
IComparable minimum = ProtectedMinimum ?? range.Minimum;
IComparable maximum = ProtectedMaximum ?? range.Maximum;
if (ValueHelper.Compare(minimum, maximum) > 0)
{
IComparable temp = maximum;
maximum = minimum;
minimum = temp;
}
return(new Range <IComparable>(minimum, maximum));
}
else
{
IComparable minimum = ProtectedMinimum;
IComparable maximum = ProtectedMaximum;
if (ProtectedMinimum != null && ProtectedMaximum == null)
{
maximum = minimum;
}
else if (ProtectedMaximum != null && ProtectedMinimum == null)
{
minimum = maximum;
}
else
{
return(range);
}
return(new Range <IComparable>(minimum, maximum));
}
}
/// <summary>
/// Returns a sequence of major values.
/// </summary>
/// <param name="availableSize">The available size.</param>
/// <returns>A sequence of major values.</returns>
protected virtual IEnumerable <DateTime> GetMajorAxisValues(Size availableSize)
{
if (!ActualRange.HasData || ValueHelper.Compare(ActualRange.Minimum, ActualRange.Maximum) == 0 || GetLength(availableSize) == 0.0)
{
yield break;
}
this.ActualInterval = CalculateActualInterval(availableSize);
DateTime date = ActualDateTimeRange.Minimum;
DateTime start = AlignIntervalStart(date, this.ActualInterval, ActualIntervalType);
while (start < date)
{
start = IncrementDateTime(start, this.ActualInterval);
}
IEnumerable <DateTime> intermediateDates =
EnumerableFunctions
.Iterate(start, next => IncrementDateTime(next, this.ActualInterval))
.TakeWhile(current => ActualDateTimeRange.Contains(current));
foreach (DateTime current in intermediateDates)
{
yield return(current);
}
}
/// <summary>
/// Returns the minimum and maximum values in a stream.
/// </summary>
/// <typeparam name="T">The type of the stream.</typeparam>
/// <param name="that">The stream.</param>
/// <returns>The range of values in the stream.</returns>
public static Range <T> GetRange <T>(this IEnumerable <T> that)
where T : IComparable
{
IEnumerator <T> enumerator = that.GetEnumerator();
if (!enumerator.MoveNext())
{
return(new Range <T>());
}
T minimum = enumerator.Current;
T maximum = minimum;
while (enumerator.MoveNext())
{
T current = enumerator.Current;
if (ValueHelper.Compare(minimum, current) == 1)
{
minimum = current;
}
if (ValueHelper.Compare(maximum, current) == -1)
{
maximum = current;
}
}
return(new Range <T>(minimum, maximum));
}
/////// <summary>
/////// Returns a new range that contains the value.
/////// </summary>
/////// <param name="value">The value to extend the range to.</param>
/////// <returns>The range which contains the value.</returns>
////public Range<T> ExtendTo(T value)
////{
//// if (!HasData)
//// {
//// return new Range<T>(value, value);
//// }
//// if (ValueHelper.Compare(Minimum, value) > 0)
//// {
//// return new Range<T>(value, Maximum);
//// }
//// else if (ValueHelper.Compare(Maximum, value) < 0)
//// {
//// return new Range<T>(Minimum, value);
//// }
//// return this;
////}
/// <summary>
/// Returns a value indicating whether two ranges intersect.
/// </summary>
/// <param name="range">The range to compare against this range.</param>
/// <returns>A value indicating whether the ranges intersect.</returns>
public bool IntersectsWith(Range <T> range)
{
if (!this.HasData || !range.HasData)
{
return(false);
}
Func <Range <T>, Range <T>, bool> rightCollidesWithLeft =
(leftRange, rightRange) =>
(ValueHelper.Compare(rightRange.Minimum, leftRange.Maximum) <= 0 && ValueHelper.Compare(rightRange.Minimum, leftRange.Minimum) >= 0) ||
(ValueHelper.Compare(leftRange.Minimum, rightRange.Maximum) <= 0 && ValueHelper.Compare(leftRange.Minimum, rightRange.Minimum) >= 0);
return(rightCollidesWithLeft(this, range) || rightCollidesWithLeft(range, this));
}
/// <summary>
/// Adds a range to the current range.
/// </summary>
/// <param name="range">A range to add to the current range.</param>
/// <returns>A new range that encompasses the instance range and the
/// range parameter.</returns>
public Range <T> Add(Range <T> range)
{
if (!this.HasData)
{
return(range);
}
else if (!range.HasData)
{
return(this);
}
T minimum = ValueHelper.Compare(this.Minimum, range.Minimum) == -1 ? this.Minimum : range.Minimum;
T maximum = ValueHelper.Compare(this.Maximum, range.Maximum) == 1 ? this.Maximum : range.Maximum;
return(new Range <T>(minimum, maximum));
}
/// <summary>
/// Initializes a new instance of the Range class.
/// </summary>
/// <param name="minimum">The minimum value.</param>
/// <param name="maximum">The maximum value.</param>
public Range(T minimum, T maximum)
{
if (minimum == null)
{
throw new ArgumentNullException("minimum");
}
if (maximum == null)
{
throw new ArgumentNullException("maximum");
}
_hasData = true;
_minimum = minimum;
_maximum = maximum;
int compareValue = ValueHelper.Compare(minimum, maximum);
if (compareValue == 1)
{
throw new InvalidOperationException(Resources.Range_ctor_MaximumValueMustBeLargerThanOrEqualToMinimumValue);
}
}
/// <summary>
/// Returns a sequence of major axis values.
/// </summary>
/// <param name="availableSize">The available size.</param>
/// <returns>A sequence of major axis values.
/// </returns>
private IEnumerable <double> GetMajorValues(Size availableSize)
{
if (!ActualRange.HasData || ValueHelper.Compare(ActualRange.Minimum, ActualRange.Maximum) == 0 || GetLength(availableSize) == 0.0)
{
yield break;
}
this.ActualInterval = CalculateActualInterval(availableSize);
double startValue = AlignToInterval(ActualDoubleRange.Minimum, this.ActualInterval);
if (startValue < ActualDoubleRange.Minimum)
{
startValue = AlignToInterval(ActualDoubleRange.Minimum + this.ActualInterval, this.ActualInterval);
}
double nextValue = startValue;
for (int counter = 1; nextValue <= ActualDoubleRange.Maximum; counter++)
{
yield return(nextValue);
nextValue = startValue + (counter * this.ActualInterval);
}
}
/// <summary>
/// Returns a value indicating whether a value is within a range.
/// </summary>
/// <param name="value">The value.</param>
/// <returns>Whether the value is within the range.</returns>
public bool Contains(T value)
{
return(ValueHelper.Compare(Minimum, value) <= 0 && ValueHelper.Compare(value, Maximum) <= 0);
}
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);
}
/// <summary>
/// Overrides the actual range to ensure that it is never set to an
/// empty range.
/// </summary>
/// <param name="range">The range to override.</param>
/// <returns>Returns the overridden range.</returns>
protected override Range <IComparable> OverrideDataRange(Range <IComparable> range)
{
range = base.OverrideDataRange(range);
if (!range.HasData)
{
return(new Range <IComparable>(0.0, 1.0));
}
else if (ValueHelper.Compare(range.Minimum, range.Maximum) == 0)
{
Range <IComparable> outputRange = new Range <IComparable>((ValueHelper.ToDouble(range.Minimum)) - 1, (ValueHelper.ToDouble(range.Maximum)) + 1);
return(outputRange);
}
// ActualLength of 1.0 or less maps all points to the same coordinate
if (range.HasData && this.ActualLength > 1.0)
{
bool isDataAnchoredToOrigin = false;
IList <ValueMarginCoordinateAndOverlap> valueMargins = new List <ValueMarginCoordinateAndOverlap>();
foreach (IValueMarginProvider valueMarginProvider in this.RegisteredListeners.OfType <IValueMarginProvider>())
{
foreach (ValueMargin valueMargin in valueMarginProvider.GetValueMargins(this))
{
IAnchoredToOrigin dataAnchoredToOrigin = valueMarginProvider as IAnchoredToOrigin;
isDataAnchoredToOrigin = (dataAnchoredToOrigin != null && dataAnchoredToOrigin.AnchoredAxis == 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 <double> originalRange = range.ToDoubleRange();
Range <double> currentRange = range.ToDoubleRange();
// Ensure range is not empty.
if (currentRange.Minimum == currentRange.Maximum)
{
currentRange = new Range <double>(currentRange.Maximum - 1, currentRange.Maximum + 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)
{
double unitOverPixels = currentRange.GetLength().Value / actualLength;
double newMinimum = currentRange.Minimum - ((maxLeftOverlapValueMargin.LeftOverlap + 0.5) * unitOverPixels);
double newMaximum = currentRange.Maximum + ((maxRightOverlapValueMargin.RightOverlap + 0.5) * unitOverPixels);
currentRange = new Range <double>(newMinimum, newMaximum);
UpdateValueMargins(valueMargins, currentRange.ToComparableRange());
GetMaxLeftAndRightOverlap(valueMargins, out maxLeftOverlapValueMargin, out maxRightOverlapValueMargin);
}
if (isDataAnchoredToOrigin)
{
if (originalRange.Minimum >= 0 && currentRange.Minimum < 0)
{
currentRange = new Range <double>(0, currentRange.Maximum);
}
else if (originalRange.Maximum <= 0 && currentRange.Maximum > 0)
{
currentRange = new Range <double>(currentRange.Minimum, 0);
}
}
return(currentRange.ToComparableRange());
}
}
return(range);
}