/// <summary>
/// IndependentCategoryAxisProperty property changed handler.
/// </summary>
/// <param name="d">ColumnSeries that changed its IndependentCategoryAxis.</param>
/// <param name="e">Event arguments.</param>
private static void OnIndependentCategoryAxisPropertyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
ColumnSeries source = (ColumnSeries)d;
ICategoryAxis newValue = (ICategoryAxis)e.NewValue;
source.OnIndependentCategoryAxisPropertyChanged(newValue);
}
/// <summary>
/// Gets a range in which to render a data point.
/// </summary>
/// <param name="category">The category to retrieve the range for.
/// </param>
/// <returns>The range in which to render a data point.</returns>
protected Range <UnitValue> GetCategoryRange(object category)
{
ICategoryAxis categoryAxis = ActualIndependentAxis as CategoryAxis;
if (categoryAxis != null)
{
return(categoryAxis.GetPlotAreaCoordinateRange(category));
}
else
{
UnitValue?unitValue = ActualIndependentAxis.GetPlotAreaCoordinate(category);
if (unitValue.HasValue && _dataPointlength.HasValue)
{
double halfLength = _dataPointlength.Value / 2.0;
if (unitValue.HasValue)
{
return(new Range <UnitValue>(
new UnitValue(unitValue.Value.Value - halfLength, unitValue.Value.Unit),
new UnitValue(unitValue.Value.Value + halfLength, unitValue.Value.Unit)));
}
}
return(new Range <UnitValue>());
}
}
/// <summary>
/// Returns a list of categories used by the series.
/// </summary>
/// <param name="categoryAxis">The axis for which to retrieve the categories.
/// </param>
/// <returns>A list of categories used by the series.</returns>
IEnumerable <object> ICategoryAxisInformationProvider.GetCategories(ICategoryAxis categoryAxis)
{
IAxis axis = (IAxis)categoryAxis;
if (axis == null)
{
throw new ArgumentNullException("categoryAxis");
}
Func <DataPoint, object> selector = null;
if (axis == InternalActualIndependentAxis)
{
if (IndependentValueBinding == null)
{
return(Enumerable.Range(1, ActiveDataPointCount).Cast <object>());
}
selector = (dataPoint) => dataPoint.IndependentValue ?? dataPoint.DependentValue;
}
else if (axis == InternalActualDependentAxis)
{
selector = (dataPoint) => dataPoint.DependentValue;
}
return(ActiveDataPoints.Select(selector).Distinct());
}
/// <summary>
/// Update axes when a data point's effective independent value changes.
/// </summary>
private void UpdateActualIndependentAxis()
{
if (InternalActualIndependentAxis != null)
{
ICategoryAxis categoryAxis = InternalActualIndependentAxis as ICategoryAxis;
if (categoryAxis != null)
{
IDataProvider categoryInformationProvider = (IDataProvider)this;
categoryAxis.DataChanged(categoryInformationProvider, categoryInformationProvider.GetData(categoryAxis));
}
IRangeConsumer rangeAxis = InternalActualIndependentAxis as IRangeConsumer;
if (rangeAxis != null)
{
IRangeProvider rangeInformationProvider = (IRangeProvider)this;
rangeAxis.RangeChanged(rangeInformationProvider, rangeInformationProvider.GetRange(rangeAxis));
}
}
}
/// <summary>
/// Update axes when a data point's effective independent value changes.
/// </summary>
private void UpdateActualIndependentAxis()
{
if (InternalActualIndependentAxis != null)
{
ICategoryAxis categoryAxis = InternalActualIndependentAxis as ICategoryAxis;
if (categoryAxis != null)
{
ICategoryAxisInformationProvider categoryInformationProvider = (ICategoryAxisInformationProvider)this;
categoryAxis.Update(categoryInformationProvider, categoryInformationProvider.GetCategories(categoryAxis));
}
IRangeAxis rangeAxis = InternalActualIndependentAxis as IRangeAxis;
if (rangeAxis != null)
{
IRangeAxisInformationProvider rangeInformationProvider = (IRangeAxisInformationProvider)this;
rangeAxis.Update(rangeInformationProvider, rangeInformationProvider.GetActualRange(rangeAxis));
}
}
}
/// <summary>
/// IndependentCategoryAxisProperty property changed handler.
/// </summary>
/// <param name="newValue">New value.</param>
private void OnIndependentCategoryAxisPropertyChanged(ICategoryAxis newValue)
{
this.InternalIndependentAxis = (IAxis)newValue;
}
/// <summary>
/// Acquires a category axis.
/// </summary>
/// <param name="assignedAxis">The axis assigned to the exposed
/// axis property.</param>
/// <param name="firstDataPoint">A data point used to determine
/// where a date or numeric axis is required.</param>
/// <param name="orientation">The desired orientation of the axis.
/// </param>
/// <param name="axisInitializationAction">A function that initializes
/// a newly created axis.</param>
/// <param name="axisPropertyAccessor">A function that returns the
/// current value of the property used to store the axis.</param>
/// <param name="axisPropertySetter">A function that accepts an axis
/// value and assigns it to the property intended to store a reference
/// to it.</param>
/// <param name="dataPointAxisValueGetter">A function that retrieves
/// the value to plot on the axis from the data point.</param>
protected void GetCategoryAxis(
IAxis assignedAxis,
DataPoint firstDataPoint,
AxisOrientation orientation,
Func <ICategoryAxis> axisInitializationAction,
Func <ICategoryAxis> axisPropertyAccessor,
Action <ICategoryAxis> axisPropertySetter,
Func <DataPoint, object> dataPointAxisValueGetter)
{
object firstCategoryValue = dataPointAxisValueGetter(firstDataPoint);
if (assignedAxis != null)
{
if (assignedAxis.Orientation == orientation)
{
ICategoryAxis assignedCategoryAxis = assignedAxis as CategoryAxis;
if (assignedCategoryAxis != null)
{
if (assignedCategoryAxis.CanPlot(firstCategoryValue))
{
axisPropertySetter(assignedCategoryAxis);
if (!assignedAxis.IsObjectRegistered(this))
{
assignedCategoryAxis.Invalidated += OnAxisInvalidated;
this.SeriesHost.RegisterWithAxis(this, (IAxis)assignedCategoryAxis);
}
return;
}
else
{
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, Properties.Resources.DataPointSeriesWithAxes_AxisCannotPlotValue, firstCategoryValue));
}
}
else
{
throw new InvalidOperationException(Properties.Resources.DataPointSeriesWithAxes_ExpectedAxesOfTypeICategoryAxis);
}
}
else
{
throw new InvalidOperationException(string.Format(CultureInfo.CurrentCulture, Properties.Resources.DataPointSeriesWithAxes_AxisIsIncorrectOrientation, orientation));
}
}
IAxis actualIndependentAxis = axisPropertyAccessor() as IAxis;
// Only acquire new independent axis if necessary
if (actualIndependentAxis == null ||
actualIndependentAxis.Orientation != orientation)
{
ICategoryAxis categoryAxis =
SeriesHost
.Axes.Where(currentAxis => currentAxis.Orientation == orientation)
.OfType <ICategoryAxis>()
.Where(
currentCategoryAxis =>
currentCategoryAxis.CanPlot(firstCategoryValue) &&
currentCategoryAxis.CanRegister(this))
.FirstOrDefault();
if (categoryAxis == null)
{
categoryAxis = axisInitializationAction();
categoryAxis.Orientation = orientation;
}
// Unregister with current axis if it has one.
if (axisPropertyAccessor() != null)
{
axisPropertyAccessor().Invalidated -= OnAxisInvalidated;
ICategoryAxis oldCategoryAxis = axisPropertyAccessor() as ICategoryAxis;
this.SeriesHost.UnregisterWithAxis(this, (IAxis)oldCategoryAxis);
}
// Set axis to be its independent axis
axisPropertySetter(categoryAxis);
if (!categoryAxis.IsObjectRegistered(this))
{
categoryAxis.Invalidated += OnAxisInvalidated;
// Register new axis with series host
this.SeriesHost.RegisterWithAxis(this, (IAxis)categoryAxis);
}
}
}
/// <summary>
/// IndependentCategoryAxisProperty property changed handler.
/// </summary>
/// <param name="newValue">New value.</param>
private void OnIndependentCategoryAxisPropertyChanged(ICategoryAxis newValue)
{
this.InternalIndependentAxis = (IAxis)newValue;
}
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>
/// 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);
ICategoryAxis categoryAxis = ActualIndependentAxis as ScrollableCategoryAxis;
Range <UnitValue> coordinateRange = categoryAxis.GetPlotAreaCoordinateRange(category);
if (!coordinateRange.HasData)
{
return;
}
else if (coordinateRange.Maximum.Unit != Unit.Pixels || coordinateRange.Minimum.Unit != Unit.Pixels)
{
throw new InvalidOperationException("This series does not support radial axes.");
}
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;
}
}
