protected virtual void OnDataPointDataPointSelectionChanging(DataPointSelectionChangingEventArgs e)
{
if (this.DataPointSelectionChanging == null)
{
return;
}
this.DataPointSelectionChanging((object)this, e);
}
internal void FireDataPointSelectionChanging(DataPoint dataPoint, bool addToSelection)
{
if (!this.IsMouseSelectionEnabled || dataPoint != null && !Enumerable.Contains <Series>(this.GetSeries(), dataPoint.Series))
{
return;
}
this.SuspendSelectionChangedEvents();
try
{
if (dataPoint == null)
{
DataPointSelectionChangingEventArgs e = new DataPointSelectionChangingEventArgs((IList <DataPoint>)Enumerable.ToList <DataPoint>(this.GetSelectedDataPoints()), (IList <DataPoint>)null);
this.OnDataPointDataPointSelectionChanging(e);
if (e.Cancel)
{
return;
}
this.ClearSelectedDataPoints();
}
else
{
List <DataPoint> list1 = new List <DataPoint>();
List <DataPoint> list2 = new List <DataPoint>();
if (!dataPoint.IsSelected)
{
list2.Add(dataPoint);
}
else if (addToSelection)
{
list1.Add(dataPoint);
}
if (!addToSelection)
{
list1 = Enumerable.ToList <DataPoint>(Enumerable.Where <DataPoint>(this.GetSelectedDataPoints(), (Func <DataPoint, bool>)(p =>
{
if (p == dataPoint)
{
return(dataPoint.IsSelected);
}
return(true);
})));
}
DataPointSelectionChangingEventArgs e = new DataPointSelectionChangingEventArgs((IList <DataPoint>)list1, (IList <DataPoint>)list2);
this.OnDataPointDataPointSelectionChanging(e);
if (e.Cancel)
{
return;
}
list1.ForEach((Action <DataPoint>)(p => p.IsSelected = false));
list2.ForEach((Action <DataPoint>)(p => p.IsSelected = true));
}
}
finally
{
this.ReleaseSelectionChangedEvents();
}
}