private void AddTopPoints(AreaRenderContext context)
{
PathFigure strokeFigure = null;
PolyLineSegment strokeLineSegment = null;
PolyLineSegment areaSegment = null;
bool addTopPointsToStroke = this.ShouldAddTopPointsToStroke;
this.FillEmptyPointsToTopSurface(context, context.CurrentSegment.StartIndex);
foreach (Point point in this.GetTopPoints(context.CurrentSegment))
{
this.topSurfacePoints.Add(point);
context.LastTopPoint = point;
// pass for first point
if (areaSegment == null)
{
areaSegment = new PolyLineSegment();
context.AreaFigure.StartPoint = point;
if (!context.IsFirstTopPointSet)
{
context.FirstTopPoint = point;
context.IsFirstTopPointSet = true;
}
if (addTopPointsToStroke)
{
strokeFigure = new PathFigure();
strokeFigure.IsFilled = false;
strokeFigure.StartPoint = point;
strokeLineSegment = new PolyLineSegment();
}
continue;
}
areaSegment.Points.Add(point);
if (addTopPointsToStroke)
{
strokeLineSegment.Points.Add(point);
}
}
context.AreaFigure.Segments.Add(areaSegment);
if (addTopPointsToStroke)
{
strokeFigure.Segments.Add(strokeLineSegment);
this.shapeGeometry.Figures.Add(strokeFigure);
}
}
private void AddRightStrokeLine(AreaRenderContext context)
{
if (this.ShouldAddRightPointsToStroke)
{
PathFigure strokeFigure = new PathFigure();
strokeFigure.IsFilled = false;
strokeFigure.StartPoint = context.LastTopPoint;
PolyLineSegment strokeLineSegment = new PolyLineSegment();
strokeLineSegment.Points.Add(context.LastBottomPoint);
strokeFigure.Segments.Add(strokeLineSegment);
this.shapeGeometry.Figures.Add(strokeFigure);
}
}
private void AddBottomPoints(AreaRenderContext context)
{
IList <Point> bottomPoints = this.GetBottomPoints(context);
if (!context.IsFirstBottomPointSet)
{
context.FirstBottomPoint = bottomPoints[0];
context.IsFirstBottomPointSet = true;
}
context.LastBottomPoint = bottomPoints[bottomPoints.Count - 1];
// Add the bottom points in reverse order
PathFigure strokeFigure = null;
PolyLineSegment strokeLineSegment = null;
bool addBottomPointsToStroke = this.ShouldAddBottomPointsToStroke;
if (addBottomPointsToStroke)
{
strokeFigure = new PathFigure();
strokeFigure.IsFilled = false;
strokeFigure.StartPoint = bottomPoints[bottomPoints.Count - 1];
strokeLineSegment = new PolyLineSegment();
}
PolyLineSegment areaSegment = new PolyLineSegment();
for (int i = bottomPoints.Count - 1; i >= 0; i--)
{
Point point = bottomPoints[i];
areaSegment.Points.Add(point);
if (addBottomPointsToStroke && i < bottomPoints.Count - 1)
{
// Skip last point since we already added it
strokeLineSegment.Points.Add(point);
}
}
context.AreaFigure.Segments.Add(areaSegment);
if (addBottomPointsToStroke)
{
strokeFigure.Segments.Add(strokeLineSegment);
this.shapeGeometry.Figures.Add(strokeFigure);
}
}
protected override IList <Point> GetBottomPoints(AreaRenderContext context)
{
AxisPlotDirection plotDirection = this.model.GetTypedValue <AxisPlotDirection>(AxisModel.PlotDirectionPropertyKey, AxisPlotDirection.Vertical);
ReferenceDictionary <string, Delegate> valueExtractor = plotDirection == AxisPlotDirection.Vertical ? VerticalRangePlotValueExtractors : HorizontalRangePlotValueExtractors;
Func <DataPoint, Point> bottomPointGetter = (Func <DataPoint, Point>)valueExtractor[BottomPointGetter];
DataPointSegment currentSegment = context.CurrentSegment;
List <Point> points = new List <Point>();
int pointIndex = currentSegment.StartIndex;
while (pointIndex <= currentSegment.EndIndex)
{
var currentPoint = this.renderPoints[pointIndex];
points.Add(bottomPointGetter(currentPoint));
pointIndex++;
}
return(points);
}
protected override void RenderCore()
{
// we need at least two points to calculate the line
if (this.renderPoints.Count < 2)
{
return;
}
AreaRenderContext context = new AreaRenderContext(this);
foreach (DataPointSegment dataSegment in ChartSeriesRenderer.GetDataSegments(this.renderPoints))
{
context.CurrentSegment = dataSegment;
context.AreaFigure = new PathFigure();
this.AddTopPoints(context);
this.AddBottomPoints(context);
context.AreaFigure.IsClosed = true;
this.areaShapeGeometry.Figures.Add(context.AreaFigure);
context.PreviousSegmentEndIndex = dataSegment.EndIndex;
}
// Fill in top points
this.FillEmptyPointsToTopSurface(context, this.renderPoints.Count - 1);
if (!this.renderPoints[this.renderPoints.Count - 1].isEmpty)
{
this.AddRightStrokeLine(context);
}
if (!this.renderPoints[0].isEmpty)
{
this.AddLeftStrokeLine(context);
}
}
private void FillEmptyPointsToTopSurface(AreaRenderContext context, int lastDataPointIndex)
{
ReferenceDictionary <string, Delegate> valueExtractor;
if (context.PlotDirection == AxisPlotDirection.Vertical)
{
valueExtractor = VerticalPlotValueExtractors;
}
else
{
valueExtractor = HorizontalPlotValueExtractors;
}
Func <DataPoint, bool, int> dataPointBoundsGetter = (Func <DataPoint, bool, int>)valueExtractor[DataPointBoundsGetter];
int lastPointBounds = dataPointBoundsGetter(this.renderPoints[lastDataPointIndex], context.IsPlotInverse);
int previousSegmentEnd = dataPointBoundsGetter(this.renderPoints[context.PreviousSegmentEndIndex], context.IsPlotInverse);
if (context.PreviousSegmentEndIndex == lastDataPointIndex || previousSegmentEnd == lastPointBounds)
{
return;
}
if (!context.IsStacked)
{
Func <DataPoint, double, Point> pointGetter = (Func <DataPoint, double, Point>)valueExtractor[PointGetter];
for (int i = context.PreviousSegmentEndIndex; i <= lastDataPointIndex; i++)
{
this.topSurfacePoints.Add(pointGetter(this.renderPoints[i], context.PlotLine));
}
}
else
{
Func <Point, int> pointBoundsGetter = (Func <Point, int>)valueExtractor[PointBoundsGetter];
Func <int, int, bool, bool> shouldSkipPreviousPoints = (Func <int, int, bool, bool>)valueExtractor[ShouldSkipPreviousPoints];
Func <int, int, bool, bool> segmentEndNotReached = (Func <int, int, bool, bool>)valueExtractor[SegmentEndNotReached];
Func <Point, Point, Point, bool> shouldRemoveDuplicate = (Func <Point, Point, Point, bool>)valueExtractor[ShouldRemoveDuplicate2];
int lastTopSurfacePointsCount = this.topSurfacePoints.Count;
IList <Point> stackedPoints = context.PreviousStackedPoints;
Point currentPoint;
int currentPointBounds;
do
{
currentPoint = stackedPoints[context.PreviousStackedPointsCurrentIndex];
currentPointBounds = pointBoundsGetter(currentPoint);
context.PreviousStackedPointsCurrentIndex++;
if (shouldSkipPreviousPoints(currentPointBounds, previousSegmentEnd, context.IsPlotInverse))
{
continue;
}
this.topSurfacePoints.Add(currentPoint);
}while (segmentEndNotReached(currentPointBounds, lastPointBounds, context.IsPlotInverse) && context.PreviousStackedPointsCurrentIndex < stackedPoints.Count);
context.PreviousStackedPointsCurrentIndex--;
if (lastTopSurfacePointsCount > 0 &&
shouldRemoveDuplicate(this.topSurfacePoints[lastTopSurfacePointsCount - 1], this.topSurfacePoints[lastTopSurfacePointsCount], this.topSurfacePoints[lastTopSurfacePointsCount + 1]))
{
this.topSurfacePoints.RemoveAt(lastTopSurfacePointsCount);
}
}
}
protected abstract IList <Point> GetBottomPoints(AreaRenderContext context);
protected override IList <Windows.Foundation.Point> GetBottomPoints(AreaRenderContext context)
{
List <Point> points = new List <Point>();
DataPointSegment currentSegment = context.CurrentSegment;
ReferenceDictionary <string, Delegate> valueExtractor;
if (context.PlotDirection == AxisPlotDirection.Vertical)
{
valueExtractor = AreaRendererBase.VerticalPlotValueExtractors;
}
else
{
valueExtractor = AreaRendererBase.HorizontalPlotValueExtractors;
}
if (!context.IsStacked)
{
Func <DataPoint, double, Point> pointGetter = (Func <DataPoint, double, Point>)valueExtractor[PointGetter];
points.Add(pointGetter(this.renderPoints[currentSegment.StartIndex], context.PlotLine));
points.Add(pointGetter(this.renderPoints[currentSegment.EndIndex], context.PlotLine));
}
else
{
Func <Point, int> pointBoundsGetter = (Func <Point, int>)valueExtractor[PointBoundsGetter];
Func <DataPoint, bool, int> dataPointBoundsGetter = (Func <DataPoint, bool, int>)valueExtractor[DataPointBoundsGetter];
Func <int, int, bool, bool> shouldSkipPreviousPoints = (Func <int, int, bool, bool>)valueExtractor[ShouldSkipPreviousPoints];
Func <int, int, bool, bool> segmentEndNotReached = (Func <int, int, bool, bool>)valueExtractor[SegmentEndNotReached];
Func <Point, Point, bool> shouldRemoveDuplicate = (Func <Point, Point, bool>)valueExtractor[ShouldRemoveDuplicate];
int segmentStart = dataPointBoundsGetter(this.renderPoints[currentSegment.StartIndex], context.IsPlotInverse);
int segmentEnd = dataPointBoundsGetter(this.renderPoints[currentSegment.EndIndex], context.IsPlotInverse);
IList <Point> stackedPoints = context.PreviousStackedPoints;
Point currentPoint;
int currentPointBounds;
do
{
currentPoint = stackedPoints[context.PreviousStackedPointsCurrentIndex];
currentPointBounds = pointBoundsGetter(currentPoint);
context.PreviousStackedPointsCurrentIndex++;
if (shouldSkipPreviousPoints(currentPointBounds, segmentStart, context.IsPlotInverse))
{
continue;
}
points.Add(currentPoint);
}while (segmentEndNotReached(currentPointBounds, segmentEnd, context.IsPlotInverse) && context.PreviousStackedPointsCurrentIndex < stackedPoints.Count);
context.PreviousStackedPointsCurrentIndex--;
if (shouldRemoveDuplicate(points[0], points[1]))
{
points.RemoveAt(0);
}
}
return(points);
}
