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();
}
}