internal override void DataMouseEnter(object sender, MouseEventArgs e)
{
if (DataTooltip == null)
{
return;
}
DataTooltip.Visibility = Visibility.Visible;
TooltipTimer.Stop();
var senderShape = HoverableShapes.FirstOrDefault(s => Equals(s.Shape, sender));
if (senderShape == null)
{
return;
}
var pieSlice = senderShape.Shape as PieSlice;
if (pieSlice == null)
{
return;
}
var labels = AxisX.Labels != null?AxisX.Labels.ToArray() : null;
senderShape.Target.Opacity = .8;
var vx = senderShape.Value.X;
var indexedToolTip = DataTooltip as IndexedTooltip;
if (indexedToolTip != null)
{
indexedToolTip.Header = labels == null
? (AxisX.LabelFormatter == null
? vx.ToString(CultureInfo.InvariantCulture)
: AxisX.LabelFormatter(vx))
: (labels.Length > vx
? labels[(int)vx]
: "");
indexedToolTip.Data = new[]
{
new IndexedTooltipData
{
Index = (int)vx,
Stroke = senderShape.Shape.Stroke,
Fill = senderShape.Shape.Fill,
Series = senderShape.Series,
Point = senderShape.Value,
Value = AxisY.LabelFormatter == null
? senderShape.Value.Y.ToString(CultureInfo.InvariantCulture)
: AxisY.LabelFormatter(senderShape.Value.Y)
}
};
}
var alpha = pieSlice.RotationAngle + pieSlice.WedgeAngle * .5 + 180;
var alphaRad = alpha * Math.PI / 180;
var sliceMidAngle = alpha - 180;
DataTooltip.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
var y = Canvas.ActualHeight * .5 + (sliceMidAngle > 90 && sliceMidAngle < 270 ? -1 : 0) * DataTooltip.DesiredSize.Height - Math.Cos(alphaRad) * 15;
var x = Canvas.ActualWidth * .5 + (sliceMidAngle > 0 && sliceMidAngle < 180 ? -1 : 0) * DataTooltip.DesiredSize.Width + Math.Sin(alphaRad) * 15;
var p = new Point(x, y);
DataTooltip.BeginAnimation(Canvas.LeftProperty, new DoubleAnimation
{
To = p.X,
Duration = TimeSpan.FromMilliseconds(200)
});
DataTooltip.BeginAnimation(Canvas.TopProperty, new DoubleAnimation
{
To = p.Y,
Duration = TimeSpan.FromMilliseconds(200)
});
pieSlice.Opacity = .8;
var anim = new DoubleAnimation
{
To = 5,
Duration = TimeSpan.FromMilliseconds(150)
};
pieSlice.BeginAnimation(PieSlice.PushOutProperty, anim);
}
