// Animation Ellipse logic.
private void UpdatePreviewIndicatorPosition(Point mousePos, FrameworkElement frameworkElement)
{
if (previewElement == null)
{
double positionX, positionY;
bool isAdornment = false;
// WPF_18250 DragDelta Event returns undesired delta value.
// Here we have reset the prevDraggedValue when dragged segment is changed.
int previousIndex = SegmentIndex;
draggingSegment = null;
SetScatterDraggingSegment(frameworkElement, ref isAdornment);
if (draggingSegment == null)
{
return;
}
if (previousIndex != SegmentIndex)
{
prevDraggedXValue = 0;
prevDraggedValue = 0;
}
XySegmentEnterEventArgs args = new XySegmentEnterEventArgs
{
XValue = GetActualXValue(SegmentIndex),
YValue = draggingSegment.YData,
SegmentIndex = SegmentIndex,
CanDrag = true,
};
RaiseDragEnter(args);
if (!args.CanDrag)
{
return;
}
positionY = Area.ValueToLogPoint(ActualYAxis, draggingSegment.YData);
positionX = Area.ValueToLogPoint(ActualXAxis, draggingSegment.XData);
if (CustomTemplate != null)
{
AnimationElement = GetPreviewEllipse() as ContentControl;
AnimateSegmentTemplate(positionX, positionY, draggingSegment);
}
else if (isAdornment)
{
if (AdornmentsInfo.Symbol.ToString() == "Custom")
{
AnimateAdornmentSymbolTemplate(positionX, positionY);
}
else
{
AddAnimationEllipse(
ChartDictionaries.GenericSymbolDictionary["Animation" + AdornmentsInfo.Symbol.ToString() + "Template"] as ControlTemplate,
AdornmentsInfo.SymbolHeight,
AdornmentsInfo.SymbolWidth,
positionX,
positionY,
Adornments[SegmentIndex],
true);
}
}
else
{
AddAnimationEllipse(
ChartDictionaries.GenericSymbolDictionary["AnimationEllipseTemplate"] as ControlTemplate,
ScatterHeight,
ScatterWidth,
positionX,
positionY,
Segments[SegmentIndex],
false);
}
}
}
private void UpdatePreviewIndicatorPosition(Point mousePos)
{
if (PreviewSeries == null && DraggingSegment == null && EnableSegmentDragging)
{
double x, y, stackedValue, positionY;
FindNearestChartPoint(mousePos, out x, out y, out stackedValue);
if (double.IsNaN(y))
{
return;
}
// WPF_18250 DragDelta Event returns undesired delta value.
// Here we have reset the prevDraggedValue when dragged segment is changed.
int previousIndex = SegmentIndex;
SegmentIndex = (int)(IsIndexed || ActualXValues is IList <string>?x : ((IList <double>)ActualXValues).IndexOf(x));
if (previousIndex != SegmentIndex)
{
prevDraggedValue = 0;
}
XySegmentEnterEventArgs args = new XySegmentEnterEventArgs
{
XValue = GetActualXValue(SegmentIndex),
SegmentIndex = SegmentIndex,
CanDrag = true,
YValue = YValues[SegmentIndex]
};
RaiseDragEnter(args);
if (!args.CanDrag)
{
return;
}
positionY = Area.ValueToLogPoint(ActualYAxis, y);
var positionX = Area.ValueToLogPoint(ActualXAxis, x);
if (AdornmentsInfo == null)
{
if (DraggingPointIndicator == null)
{
AddSegmentIndicator();
}
if (this.IsActualTransposed)
{
Canvas.SetTop(DraggingPointIndicator, positionX - DraggingPointIndicator.Width / 2);
Canvas.SetLeft(DraggingPointIndicator, positionY - DraggingPointIndicator.Height / 2);
}
else
{
Canvas.SetLeft(DraggingPointIndicator, positionX - DraggingPointIndicator.Width / 2);
Canvas.SetTop(DraggingPointIndicator, positionY - DraggingPointIndicator.Height / 2);
}
DraggingPointIndicator.Tag = Math.Abs(Segments.Count - SegmentIndex) > 0
? Segments[(int)SegmentIndex]
: Segments[(int)SegmentIndex - 1];
AddAnimationEllipse(
ChartDictionaries.GenericSymbolDictionary["AnimationEllipseTemplate"] as ControlTemplate,
DraggingPointIndicator.Height,
DraggingPointIndicator.Width,
positionX,
positionY,
null,
false);
}
else if (AdornmentsInfo != null && AdornmentsInfo.Symbol != ChartSymbol.Custom)
{
AddAnimationEllipse(
ChartDictionaries.GenericSymbolDictionary["Animation" + AdornmentsInfo.Symbol.ToString() + "Template"] as ControlTemplate,
AdornmentsInfo.SymbolHeight,
AdornmentsInfo.SymbolWidth,
positionX,
positionY,
null,
true);
}
}
}