internal override void UpdateTooltip(object originalSource)
{
if (ShowTooltip)
{
FrameworkElement element = originalSource as FrameworkElement;
object chartSegment = null;
int index = -1;
if (element != null)
{
if (element.Tag is ChartSegment)
{
chartSegment = element.Tag;
}
else if (Segments.Count > 0)
{
chartSegment = Segments[0];
}
else
{
// WPF-28526- Tooltip not shown when set the single data point with adornments for continuous series.
index = ChartExtensionUtils.GetAdornmentIndex(element);
chartSegment = index != -1 ? new StackingAreaSegment() : null;
}
}
if (chartSegment == null)
{
return;
}
SetTooltipDuration();
var canvas = this.Area.GetAdorningCanvas();
double xVal = 0;
double yVal = 0;
double stackedYValue = double.NaN;
object data = null;
index = 0;
if (this.Area.SeriesClipRect.Contains(mousePos))
{
var point = new Point(
mousePos.X - this.Area.SeriesClipRect.Left,
mousePos.Y - this.Area.SeriesClipRect.Top);
this.FindNearestChartPoint(point, out xVal, out yVal, out stackedYValue);
if (double.IsNaN(xVal))
{
return;
}
if (ActualXAxis is CategoryAxis && (ActualXAxis as CategoryAxis).IsIndexed)
{
index = YValues.IndexOf(yVal);
}
else
{
index = this.GetXValues().IndexOf(xVal);
}
foreach (var series in Area.Series)
{
if (series == this)
{
data = this.ActualData[index];
}
}
}
if (data == null)
{
return; // To ignore tooltip when mousePos is not inside the SeriesClipRect.
}
if (this.Area.Tooltip == null)
{
this.Area.Tooltip = new ChartTooltip();
}
var chartTooltip = this.Area.Tooltip as ChartTooltip;
var stackingAreaSegment = chartSegment as StackingAreaSegment;
stackingAreaSegment.Item = data;
stackingAreaSegment.XData = xVal;
stackingAreaSegment.YData = yVal;
if (chartTooltip != null)
{
if (canvas.Children.Count == 0 || (canvas.Children.Count > 0 && !IsTooltipAvailable(canvas)))
{
chartTooltip.Content = chartSegment;
if (chartTooltip.Content == null)
{
return;
}
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;
}
}
chartTooltip.Content = chartSegment;
if (chartTooltip.Content == null)
{
RemoveTooltip();
return;
}
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
{
_stopwatch.Restart();
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
}
}
}
}