private void SetTooltipSegmentItem(StepLineSegment lineSegment)
{
double xVal = 0;
double yVal = 0;
double stackValue = double.NaN;
var point = new Point(mousePos.X - this.Area.SeriesClipRect.Left, mousePos.Y - this.Area.SeriesClipRect.Top);
FindNearestChartPoint(point, out xVal, out yVal, out stackValue);
if (double.IsNaN(xVal))
{
return;
}
if (lineSegment != null)
{
lineSegment.YData = yVal == lineSegment.Y1Value ? lineSegment.Y1Value : lineSegment.Y1Data;
}
var segmentIndex = this.GetXValues().IndexOf(xVal);
if (!IsIndexed)
{
IList <double> xValues = this.ActualXValues as IList <double>;
int i = segmentIndex;
double nearestY = this.ActualSeriesYValues[0][i];
while (xValues.Count > i && xValues[i] == xVal)
{
double yValue = ActualArea.PointToValue(ActualYAxis, point);
var validateYValue = ActualSeriesYValues[0][i];
if (Math.Abs(yValue - validateYValue) <= Math.Abs(yValue - nearestY))
{
segmentIndex = i;
nearestY = validateYValue;
}
i++;
}
}
lineSegment.Item = this.ActualData[segmentIndex];
}
internal override void UpdateTooltip(object originalSource)
{
if (ShowTooltip)
{
FrameworkElement element = originalSource as FrameworkElement;
object chartSegment = null;
if (element != null)
{
if (element.Tag is ChartSegment)
{
chartSegment = element.Tag;
}
else if (element.DataContext is ChartSegment && !(element.DataContext is ChartAdornment))
{
chartSegment = element.DataContext;
}
else
{
int index = ChartExtensionUtils.GetAdornmentIndex(element);
if (index != -1)
{
if (index < Segments.Count)
{
chartSegment = Segments[index];
}
else if (Segments.Count > 0)
{
chartSegment = Segments[index - 1];
}
else if (index < Adornments.Count)
{
// WPF-28526- Tooltip not shown when set the single data point with adornments for continuous series.
ChartAdornment adornment = Adornments[index];
chartSegment = new StepLineSegment()
{
X1Value = adornment.XData,
Y1Value = adornment.YData,
X1Data = adornment.XData,
Y1Data = adornment.YData,
X1 = adornment.XData,
Y1 = adornment.YData,
XData = adornment.XData,
YData = adornment.YData,
Item = adornment.Item
};
}
}
}
}
if (chartSegment == null)
{
return;
}
SetTooltipDuration();
var canvas = this.Area.GetAdorningCanvas();
if (this.Area.Tooltip == null)
{
this.Area.Tooltip = new ChartTooltip();
}
var chartTooltip = this.Area.Tooltip as ChartTooltip;
if (chartTooltip != null)
{
var lineSegment = chartSegment as StepLineSegment;
if (canvas.Children.Count == 0 || (canvas.Children.Count > 0 && !IsTooltipAvailable(canvas)))
{
SetTooltipSegmentItem(lineSegment);
chartTooltip.Content = chartSegment;
if (ChartTooltip.GetInitialShowDelay(this) == 0)
{
canvas.Children.Add(chartTooltip);
}
chartTooltip.ContentTemplate = this.GetTooltipTemplate();
AddTooltip();
if (ChartTooltip.GetEnableAnimation(this))
{
SetDoubleAnimation(chartTooltip);
storyBoard.Children.Add(leftDoubleAnimation);
storyBoard.Children.Add(topDoubleAnimation);
Canvas.SetLeft(chartTooltip, chartTooltip.LeftOffset);
Canvas.SetTop(chartTooltip, chartTooltip.TopOffset);
_stopwatch.Start();
}
else
{
Canvas.SetLeft(chartTooltip, chartTooltip.LeftOffset);
Canvas.SetTop(chartTooltip, chartTooltip.TopOffset);
_stopwatch.Start();
}
}
else
{
foreach (var child in canvas.Children)
{
var tooltip = child as ChartTooltip;
if (tooltip != null)
{
chartTooltip = tooltip;
}
}
SetTooltipSegmentItem(lineSegment);
chartTooltip.Content = chartSegment;
chartTooltip.ContentTemplate = this.GetTooltipTemplate();
AddTooltip();
#if NETFX_CORE
if (_stopwatch.ElapsedMilliseconds > 100)
{
#endif
if (ChartTooltip.GetEnableAnimation(this))
{
_stopwatch.Restart();
if (leftDoubleAnimation == null || topDoubleAnimation == null || storyBoard == null)
{
SetDoubleAnimation(chartTooltip);
}
else
{
leftDoubleAnimation.To = chartTooltip.LeftOffset;
topDoubleAnimation.To = chartTooltip.TopOffset;
storyBoard.Begin();
}
}
else
{
Canvas.SetLeft(chartTooltip, chartTooltip.LeftOffset);
Canvas.SetTop(chartTooltip, chartTooltip.TopOffset);
}
#if NETFX_CORE
}
else if (EnableAnimation == false)
{
Canvas.SetLeft(chartTooltip, chartTooltip.LeftOffset);
Canvas.SetTop(chartTooltip, chartTooltip.TopOffset);
}
#endif
}
}
}
}
/// <summary>
/// Creates the segments of StepLineSeries.
/// </summary>
public override void CreateSegments()
{
List <double> xValues = null;
bool isGrouping = this.ActualXAxis is CategoryAxis && !(this.ActualXAxis as CategoryAxis).IsIndexed;
if (isGrouping)
{
xValues = GroupedXValuesIndexes;
}
else
{
xValues = GetXValues();
}
if (xValues == null)
{
return;
}
double xOffset = 0d;
if (ActualXAxis is CategoryAxis &&
(ActualXAxis as CategoryAxis).LabelPlacement == LabelPlacement.BetweenTicks)
{
xOffset = 0.5d;
}
if (isGrouping)
{
Segments.Clear();
Adornments.Clear();
for (int i = 0; i < xValues.Count; i++)
{
int index = i + 1;
ChartPoint point1, point2, stepPoint;
if (AdornmentsInfo != null)
{
Adornments.Add(this.CreateAdornment(this, xValues[i], GroupedSeriesYValues[0][i], xValues[i], GroupedSeriesYValues[0][i]));
Adornments[i].Item = ActualData[i];
}
if (index < xValues.Count)
{
point1 = new ChartPoint(xValues[i] - xOffset, GroupedSeriesYValues[0][i]);
point2 = new ChartPoint(xValues[index] - xOffset, GroupedSeriesYValues[0][i]);
stepPoint = new ChartPoint(xValues[index] - xOffset, GroupedSeriesYValues[0][index]);
}
else
{
if (!(xOffset > 0))
{
continue;
}
point1 = new ChartPoint(xValues[i] - xOffset, GroupedSeriesYValues[0][i]);
point2 = new ChartPoint(xValues[i] + xOffset, GroupedSeriesYValues[0][i]);
stepPoint = new ChartPoint(xValues[i] - xOffset, GroupedSeriesYValues[0][i]);
}
var segment = new StepLineSegment(point1, stepPoint, point2, this)
{
Item = ActualData[i]
};
segment.Series = this;
List <ChartPoint> listPoints = new List <ChartPoint>();
listPoints.Add(point1);
listPoints.Add(stepPoint);
listPoints.Add(point2);
segment.SetData(listPoints);
Segments.Add(segment);
listPoints = null;
}
}
else
{
ClearUnUsedStepLineSegment(DataCount);
ClearUnUsedAdornments(DataCount);
for (int i = 0; i < DataCount; i++)
{
int index = i + 1;
ChartPoint point1, point2, stepPoint;
if (AdornmentsInfo != null)
{
if (i < Adornments.Count)
{
Adornments[i].SetData(xValues[i], YValues[i], xValues[i], YValues[i]);
Adornments[i].Item = ActualData[i];
}
else
{
Adornments.Add(this.CreateAdornment(this, xValues[i], YValues[i], xValues[i], YValues[i]));
Adornments[i].Item = ActualData[i];
}
}
if (index < DataCount)
{
point1 = new ChartPoint(xValues[i] - xOffset, YValues[i]);
point2 = new ChartPoint(xValues[index] - xOffset, YValues[i]);
stepPoint = new ChartPoint(xValues[index] - xOffset, YValues[index]);
}
else
{
if (!(xOffset > 0))
{
continue;
}
point1 = new ChartPoint(xValues[i] - xOffset, YValues[i]);
point2 = new ChartPoint(xValues[i] + xOffset, YValues[i]);
stepPoint = new ChartPoint(xValues[i] - xOffset, YValues[i]);
}
if (i < Segments.Count)
{
Segments[i].SetData(new List <ChartPoint> {
point1, stepPoint, point2
});
Segments[i].Item = ActualData[i];
(Segments[i] as StepLineSegment).YData = YValues[i];
if (SegmentColorPath != null && !Segments[i].IsEmptySegmentInterior && ColorValues.Count > 0 && !Segments[i].IsSelectedSegment)
{
Segments[i].Interior = (Interior != null) ? Interior : ColorValues[i];
}
}
else
{
var segment = new StepLineSegment(point1, stepPoint, point2, this)
{
Item = ActualData[i]
};
segment.Series = this;
List <ChartPoint> listPoints = new List <ChartPoint>();
listPoints.Add(point1);
listPoints.Add(stepPoint);
listPoints.Add(point2);
segment.SetData(listPoints);
Segments.Add(segment);
listPoints = null;
}
}
}
if (ShowEmptyPoints)
{
UpdateEmptyPointSegments(xValues, false);
}
}