void _dragHelper_DragDelta(object sender, C1DragDeltaEventArgs e)
{
if (moving != null)
{
Point position = e.GetPosition(Chart.View.Viewport);
position.X -= offset.X;
position.Y -= offset.Y;
if (moving.Attach != ChartPanelAttach.None)
{
MeasureOption x = MeasureOption.X;
if (moving.Attach == ChartPanelAttach.DataY)
{
x = MeasureOption.Y;
}
else if (moving.Attach == ChartPanelAttach.DataXY)
{
x = MeasureOption.XY;
}
int seriesIndex = -1;
int pointIndex = -1;
DataDistanceFromPoint(position, x, out seriesIndex, out pointIndex);
if ((seriesIndex >= 0) && (pointIndex >= 0))
{
position = Chart.View.DataIndexToPoint(seriesIndex, pointIndex);
}
}
position = Chart.View.PointToData(moving.AxisX, moving.AxisY, position);
moving.SetPoint(position);
base.InvalidateArrange();
}
}
double DataDistanceFromPoint(Point pt, MeasureOption measureOption, out int seriesIndex, out int pointIndex)
{
int num = Chart.Data.Children.Count;
double naN = double.NaN;
seriesIndex = -1;
pointIndex = -1;
for (int i = 0; i < num; i++)
{
double distance = 0.0;
int num5 = Chart.View.DataIndexFromPoint(pt, i, measureOption, out distance);
if (double.IsNaN(naN) || (distance < naN))
{
naN = distance;
seriesIndex = i;
pointIndex = num5;
}
}
return(naN);
}
void ChartPanel_MouseMove(object sender, PointerRoutedEventArgs e)
{
int num = Children.Count;
bool flag = false;
for (int i = 0; i < num; i++)
{
ChartPanelObject obj2 = Children[i];
if (obj2.Action == ChartPanelAction.MouseMove)
{
Point position = e.GetPosition(Chart.View.Viewport);
if (obj2.Attach != ChartPanelAttach.None)
{
int num3;
int num4;
MeasureOption x = MeasureOption.X;
if (obj2.Attach == ChartPanelAttach.DataY)
{
x = MeasureOption.Y;
}
else if (obj2.Attach == ChartPanelAttach.DataXY)
{
x = MeasureOption.XY;
}
DataDistanceFromPoint(position, x, out num3, out num4);
if ((num3 >= 0) && (num4 >= 0))
{
position = Chart.View.DataIndexToPoint(num3, num4);
}
}
position = Chart.View.PointToData(obj2.AxisX, obj2.AxisY, position);
obj2.SetPoint(position);
flag = true;
}
}
if (flag)
{
base.InvalidateArrange();
}
}
public int DataIndexFromPoint(Point pt, int seriesIndex, MeasureOption option, out double distance)
{
distance = double.MaxValue;
if (seriesIndex >= _chart.Data.Children.Count)
{
return(-1);
}
DataSeries ds = _chart.Data.Children[seriesIndex];
double[,] values = ds.GetValues();
if (values == null)
{
return(-1);
}
PointD td = PointToData(ds, pt);
int num = 0;
double y = td.Y;
if (option == MeasureOption.X)
{
num = 1;
y = td.X;
}
else if (option == MeasureOption.XY)
{
num = 2;
}
int num3 = -1;
int length = values.GetLength(0);
Axis axisX = GetAxisX(ds);
Axis axisY = GetAxisY(ds);
double actualMin = axisX.ActualMin;
double actualMax = axisX.ActualMax;
double num7 = axisY.ActualMin;
double num8 = axisY.ActualMax;
if (values != null)
{
int num9 = values.GetLength(1);
for (int i = 0; i < num9; i++)
{
double d = (length > 1) ? values[1, i] : ((double)i);
double num12 = values[0, i];
if (((d >= actualMin) && (d <= actualMax)) && ((num12 >= num7) && (num12 <= num8)))
{
if (num == 2)
{
if (!double.IsNaN(d) && !double.IsNaN(num12))
{
PointD td2 = PointFromData(ds, new PointD(d, num12));
double num13 = td2.X - pt.X;
double num14 = td2.Y - pt.Y;
double num15 = Math.Sqrt((num13 * num13) + (num14 * num14));
if (num15 < distance)
{
distance = num15;
num3 = i;
}
}
}
else
{
double num16 = (num == 1) ? d : num12;
if (!double.IsNaN(num16))
{
double num17 = Math.Abs((double)(num16 - y));
if (num17 < distance)
{
distance = num17;
num3 = i;
}
}
}
}
}
}
if (distance != double.MaxValue)
{
if (option == MeasureOption.X)
{
distance = _viewport.ConvertX(distance) - _viewport.ConvertX(0.0);
return(num3);
}
if (option == MeasureOption.Y)
{
distance = _viewport.ConvertY(distance) - _viewport.ConvertY(0.0);
}
}
return(num3);
}
