| public static ToDouble ( object value ) : double | ||
| value | object | The value to convert to a double. |
| Résultat | double | |
/// <summary>
/// Attempts to convert an object into a double.
/// </summary>
/// <param name="value">The value to convert.</param>
/// <param name="doubleValue">The double value.</param>
/// <returns>A value indicating whether the value can be converted to a
/// double.</returns>
public static bool TryConvert(object value, out double doubleValue)
{
doubleValue = default(double);
try
{
if (value != null &&
(value is double ||
value is int ||
value is byte ||
value is short ||
value is decimal ||
value is float ||
value is long ||
value is uint ||
value is sbyte ||
value is ushort ||
value is ulong))
{
doubleValue = ValueHelper.ToDouble(value);
return(true);
}
}
catch (FormatException)
{
}
catch (InvalidCastException)
{
}
return(false);
}
/// <summary>
/// Returns the plot area coordinate of a value.
/// </summary>
/// <param name="value">The value to plot.</param>
/// <param name="currentRange">The range of values.</param>
/// <param name="length">The length of axis.</param>
/// <returns>The plot area coordinate of a value.</returns>
private static UnitValue GetPlotAreaCoordinate(object value, Range <double> currentRange, double length)
{
if (currentRange.HasData)
{
double doubleValue = ValueHelper.ToDouble(value);
double pixelLength = Math.Max(length - 1, 0);
double rangelength = currentRange.Maximum - currentRange.Minimum;
return(new UnitValue((doubleValue - currentRange.Minimum) * (pixelLength / rangelength), Unit.Pixels));
}
return(UnitValue.NaN());
}
/// <summary>
/// Updates the ratios of each data point.
/// </summary>
private void UpdateRatios()
{
double sum = ActivePieDataPoints.Select(pieDataPoint => Math.Abs(ValueHelper.ToDouble(pieDataPoint.DependentValue))).Sum();
// Priming the loop by calculating initial value of
// offset ratio and its corresponding points.
double offsetRatio = 0;
foreach (PieDataPoint dataPoint in ActivePieDataPoints)
{
double dependentValue = Math.Abs(ValueHelper.ToDouble(dataPoint.DependentValue));
double ratio = dependentValue / sum;
if (!ValueHelper.CanGraph(ratio))
{
ratio = 0.0;
}
dataPoint.Ratio = ratio;
dataPoint.OffsetRatio = offsetRatio;
offsetRatio += ratio;
}
}
private static Storyboard CreateStoryboard(
FrameworkElement target,
DependencyProperty animatingDependencyProperty,
string propertyPath,
ref object toValue,
TimeSpan durationTimeSpan,
EasingFunctionBase easingFunction)
{
object fromValue = target.GetValue(animatingDependencyProperty);
double fromDoubleValue;
double toDoubleValue;
DateTime fromDateTime;
DateTime toDateTime;
Storyboard storyBoard = new Storyboard();
Storyboard.SetTarget(storyBoard, target);
Storyboard.SetTargetProperty(storyBoard, propertyPath);
if ((fromValue != null && toValue != null))
{
if (ValueHelper.TryConvert(fromValue, out fromDoubleValue) && ValueHelper.TryConvert(toValue, out toDoubleValue))
{
DoubleAnimation doubleAnimation = new DoubleAnimation();
doubleAnimation.EnableDependentAnimation = true;
#if !NO_EASING_FUNCTIONS
doubleAnimation.EasingFunction = easingFunction;
#endif
doubleAnimation.Duration = durationTimeSpan;
doubleAnimation.To = ValueHelper.ToDouble(toValue);
toValue = doubleAnimation.To;
storyBoard.Children.Add(doubleAnimation);
}
else if (ValueHelper.TryConvert(fromValue, out fromDateTime) && ValueHelper.TryConvert(toValue, out toDateTime))
{
ObjectAnimationUsingKeyFrames keyFrameAnimation = new ObjectAnimationUsingKeyFrames();
keyFrameAnimation.EnableDependentAnimation = true;
keyFrameAnimation.Duration = durationTimeSpan;
long intervals = (long)(durationTimeSpan.TotalSeconds * KeyFramesPerSecond);
if (intervals < 2L)
{
intervals = 2L;
}
IEnumerable <TimeSpan> timeSpanIntervals =
ValueHelper.GetTimeSpanIntervalsInclusive(durationTimeSpan, intervals);
IEnumerable <DateTime> dateTimeIntervals =
ValueHelper.GetDateTimesBetweenInclusive(fromDateTime, toDateTime, intervals);
IEnumerable <DiscreteObjectKeyFrame> keyFrames =
EnumerableFunctions.Zip(
dateTimeIntervals,
timeSpanIntervals,
(dateTime, timeSpan) => new DiscreteObjectKeyFrame()
{
Value = dateTime, KeyTime = timeSpan
});
foreach (DiscreteObjectKeyFrame keyFrame in keyFrames)
{
keyFrameAnimation.KeyFrames.Add(keyFrame);
toValue = keyFrame.Value;
}
storyBoard.Children.Add(keyFrameAnimation);
}
}
if (storyBoard.Children.Count == 0)
{
ObjectAnimationUsingKeyFrames keyFrameAnimation = new ObjectAnimationUsingKeyFrames();
keyFrameAnimation.EnableDependentAnimation = true;
DiscreteObjectKeyFrame endFrame = new DiscreteObjectKeyFrame()
{
Value = toValue, KeyTime = new TimeSpan(0, 0, 0)
};
keyFrameAnimation.KeyFrames.Add(endFrame);
storyBoard.Children.Add(keyFrameAnimation);
}
return(storyBoard);
}
/// <summary>
/// Updates each point.
/// </summary>
/// <param name="dataPoint">The data point to update.</param>
protected override void UpdateDataPoint(DataPoint dataPoint)
{
if (SeriesHost == null || PlotArea == null)
{
return;
}
object category = dataPoint.ActualIndependentValue ?? (this.ActiveDataPoints.IndexOf(dataPoint) + 1);
Range <UnitValue> coordinateRange = GetCategoryRange(category);
if (!coordinateRange.HasData)
{
return;
}
if (coordinateRange.Maximum.Unit != Unit.Pixels || coordinateRange.Minimum.Unit != Unit.Pixels)
{
throw new InvalidOperationException(Properties.Resources.DataPointSeriesWithAxes_ThisSeriesDoesNotSupportRadialAxes);
}
double minimum = (double)coordinateRange.Minimum.Value;
double maximum = (double)coordinateRange.Maximum.Value;
double plotAreaHeight = ActualDependentRangeAxis.GetPlotAreaCoordinate(ActualDependentRangeAxis.Range.Maximum).Value;
IEnumerable <ColumnSeries> columnSeries = SeriesHost.Series.OfType <ColumnSeries>().Where(series => series.ActualIndependentAxis == ActualIndependentAxis);
int numberOfSeries = columnSeries.Count();
double coordinateRangeWidth = (maximum - minimum);
double segmentWidth = coordinateRangeWidth * 0.8;
double columnWidth = segmentWidth / numberOfSeries;
int seriesIndex = columnSeries.IndexOf(this);
double dataPointY = ActualDependentRangeAxis.GetPlotAreaCoordinate(ValueHelper.ToDouble(dataPoint.ActualDependentValue)).Value;
double zeroPointY = ActualDependentRangeAxis.GetPlotAreaCoordinate(ActualDependentRangeAxis.Origin).Value;
double offset = seriesIndex * Math.Round(columnWidth) + coordinateRangeWidth * 0.1;
double dataPointX = minimum + offset;
if (GetIsDataPointGrouped(category))
{
// Multiple DataPoints share this category; offset and overlap them appropriately
IGrouping <object, DataPoint> categoryGrouping = GetDataPointGroup(category);
int index = categoryGrouping.IndexOf(dataPoint);
dataPointX += (index * (columnWidth * 0.2)) / (categoryGrouping.Count() - 1);
columnWidth *= 0.8;
Canvas.SetZIndex(dataPoint, -index);
}
if (ValueHelper.CanGraph(dataPointY) && ValueHelper.CanGraph(dataPointX) && ValueHelper.CanGraph(zeroPointY))
{
dataPoint.Visibility = Visibility.Visible;
double left = Math.Round(dataPointX);
double width = Math.Round(columnWidth);
double top = Math.Round(plotAreaHeight - Math.Max(dataPointY, zeroPointY) + 0.5);
double bottom = Math.Round(plotAreaHeight - Math.Min(dataPointY, zeroPointY) + 0.5);
double height = bottom - top + 1;
Canvas.SetLeft(dataPoint, left);
Canvas.SetTop(dataPoint, top);
dataPoint.Width = width;
dataPoint.Height = height;
}
else
{
dataPoint.Visibility = Visibility.Collapsed;
}
}
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 void UpdateDataItemPlacement(IEnumerable <DefinitionSeries.DataItem> dataItems)
{
IAxis actualIndependentAxis = ActualIndependentAxis;
if ((null != ActualDependentAxis) && (null != actualIndependentAxis))
{
double plotAreaMaximumDependentCoordinate = ActualDependentAxis.GetPlotAreaCoordinate(ActualDependentRangeAxis.Range.Maximum).Value;
double zeroCoordinate = ActualDependentAxis.GetPlotAreaCoordinate(ActualDependentRangeAxis.Origin ?? 0.0).Value;
ICategoryAxis actualIndependentCategoryAxis = actualIndependentAxis as ICategoryAxis;
double nonCategoryAxisRangeMargin = (null != actualIndependentCategoryAxis) ? 0 : GetMarginForNonCategoryAxis(actualIndependentAxis);
foreach (IndependentValueGroup group in IndependentValueGroups)
{
Range <UnitValue> categoryRange = new Range <UnitValue>();
if (null != actualIndependentCategoryAxis)
{
categoryRange = actualIndependentCategoryAxis.GetPlotAreaCoordinateRange(group.IndependentValue);
}
else
{
UnitValue independentValueCoordinate = actualIndependentAxis.GetPlotAreaCoordinate(group.IndependentValue);
if (ValueHelper.CanGraph(independentValueCoordinate.Value))
{
categoryRange = new Range <UnitValue>(new UnitValue(independentValueCoordinate.Value - nonCategoryAxisRangeMargin, independentValueCoordinate.Unit), new UnitValue(independentValueCoordinate.Value + nonCategoryAxisRangeMargin, independentValueCoordinate.Unit));
}
}
if (categoryRange.HasData)
{
double categoryMinimumCoordinate = categoryRange.Minimum.Value;
double categoryMaximumCoordinate = categoryRange.Maximum.Value;
double padding = 0.1 * (categoryMaximumCoordinate - categoryMinimumCoordinate);
categoryMinimumCoordinate += padding;
categoryMaximumCoordinate -= padding;
double sum = IsStacked100 ?
group.DataItems.Sum(di => Math.Abs(ValueHelper.ToDouble(di.DataPoint.ActualDependentValue))) :
1;
if (0 == sum)
{
sum = 1;
}
double ceiling = 0;
double floor = 0;
foreach (DataItem dataItem in group.DataItems)
{
DataPoint dataPoint = dataItem.DataPoint;
double value = IsStacked100 ? (ValueHelper.ToDouble(dataPoint.ActualDependentValue) * (100 / sum)) : ValueHelper.ToDouble(dataPoint.ActualDependentValue);
if (ValueHelper.CanGraph(value))
{
double valueCoordinate = ActualDependentAxis.GetPlotAreaCoordinate(value).Value;
double fillerCoordinate = (0 <= value) ? ceiling : floor;
double topCoordinate = 0, leftCoordinate = 0, height = 0, width = 0, deltaCoordinate = 0;
if (AxisOrientation.Y == ActualDependentAxis.Orientation)
{
topCoordinate = plotAreaMaximumDependentCoordinate - Math.Max(valueCoordinate + fillerCoordinate, zeroCoordinate + fillerCoordinate);
double bottomCoordinate = plotAreaMaximumDependentCoordinate - Math.Min(valueCoordinate + fillerCoordinate, zeroCoordinate + fillerCoordinate);
deltaCoordinate = bottomCoordinate - topCoordinate;
height = (0 < deltaCoordinate) ? deltaCoordinate + 1 : 0;
leftCoordinate = categoryMinimumCoordinate;
width = categoryMaximumCoordinate - categoryMinimumCoordinate + 1;
}
else
{
leftCoordinate = Math.Min(valueCoordinate + fillerCoordinate, zeroCoordinate + fillerCoordinate);
double rightCoordinate = Math.Max(valueCoordinate + fillerCoordinate, zeroCoordinate + fillerCoordinate);
deltaCoordinate = rightCoordinate - leftCoordinate;
width = (0 < deltaCoordinate) ? deltaCoordinate + 1 : 0;
topCoordinate = categoryMinimumCoordinate;
height = categoryMaximumCoordinate - categoryMinimumCoordinate + 1;
}
double roundedTopCoordinate = Math.Round(topCoordinate);
Canvas.SetTop(dataItem.Container, roundedTopCoordinate);
dataPoint.Height = Math.Round(topCoordinate + height - roundedTopCoordinate);
double roundedLeftCoordinate = Math.Round(leftCoordinate);
Canvas.SetLeft(dataItem.Container, roundedLeftCoordinate);
dataPoint.Width = Math.Round(leftCoordinate + width - roundedLeftCoordinate);
dataPoint.Visibility = Visibility.Visible;
if (0 <= value)
{
ceiling += deltaCoordinate;
}
else
{
floor -= deltaCoordinate;
}
}
else
{
dataPoint.Visibility = Visibility.Collapsed;
}
}
}
else
{
foreach (DataPoint dataPoint in group.DataItems.Select(di => di.DataPoint))
{
dataPoint.Visibility = Visibility.Collapsed;
}
}
}
}
}
/// <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);
}
/// <summary>
/// Updates the placement of the DataItems (data points) of the series.
/// </summary>
/// <param name="dataItems">DataItems in need of an update.</param>
protected override void UpdateDataItemPlacement(IEnumerable <DefinitionSeries.DataItem> dataItems)
{
if ((null != ActualDependentAxis) && (null != ActualIndependentAxis))
{
double plotAreaMaximumDependentCoordinate = ActualDependentAxis.GetPlotAreaCoordinate(ActualDependentRangeAxis.Range.Maximum).Value;
double lineTopBuffer = 1;
List <Point>[] points = new List <Point> [SeriesDefinitions.Count];
for (int i = 0; i < points.Length; i++)
{
points[i] = new List <Point>();
}
foreach (IndependentValueGroup group in IndependentValueGroupsOrderedByIndependentValue)
{
double sum = IsStacked100 ?
group.DataItems.Sum(di => Math.Abs(ValueHelper.ToDouble(di.DataPoint.ActualDependentValue))) :
1;
if (0 == sum)
{
sum = 1;
}
double x = ActualIndependentAxis.GetPlotAreaCoordinate(group.IndependentValue).Value;
if (ValueHelper.CanGraph(x))
{
double lastValue = 0;
Point lastPoint = new Point(x, Math.Max(plotAreaMaximumDependentCoordinate - ActualDependentRangeAxis.GetPlotAreaCoordinate(lastValue).Value, lineTopBuffer));
int i = -1;
SeriesDefinition lastDefinition = null;
foreach (DataItem dataItem in group.DataItems)
{
if (lastDefinition != dataItem.SeriesDefinition)
{
i++;
}
while (dataItem.SeriesDefinition != SeriesDefinitions[i])
{
points[i].Add(lastPoint);
i++;
}
DataPoint dataPoint = dataItem.DataPoint;
double value = IsStacked100 ?
(ValueHelper.ToDouble(dataItem.DataPoint.ActualDependentValue) * (100 / sum)) :
ValueHelper.ToDouble(dataItem.DataPoint.ActualDependentValue);
if (ValueHelper.CanGraph(value))
{
value += lastValue;
dataItem.ActualStackedDependentValue = value;
double y = ActualDependentRangeAxis.GetPlotAreaCoordinate(value).Value;
lastValue = value;
lastPoint.Y = Math.Max(plotAreaMaximumDependentCoordinate - y, lineTopBuffer);
points[i].Add(lastPoint);
dataItem.CenterPoint = new Point(x, plotAreaMaximumDependentCoordinate - y);
double left = dataItem.CenterPoint.X - (dataPoint.ActualWidth / 2);
double top = dataItem.CenterPoint.Y - (dataPoint.ActualHeight / 2);
Canvas.SetLeft(dataItem.Container, Math.Round(left));
Canvas.SetTop(dataItem.Container, Math.Round(top));
dataPoint.Visibility = Visibility.Visible;
}
else
{
points[i].Add(lastPoint);
dataPoint.Visibility = Visibility.Collapsed;
}
lastDefinition = dataItem.SeriesDefinition;
}
}
else
{
foreach (DataPoint dataPoint in group.DataItems.Select(di => di.DataPoint))
{
dataPoint.Visibility = Visibility.Collapsed;
}
}
}
UpdateShape(points);
}
}
