public int?GetResizingColumn(Point pt)
{
if (pt.Y > HeaderHeight)
{
return(null);
}
int frozenWidth = FrozenWidth;
if ((int)pt.X - HeaderWidth <= frozenWidth + ColumnResizeTheresold)
{
if ((int)pt.X - HeaderWidth >= frozenWidth - ColumnResizeTheresold && (int)pt.X - HeaderWidth <= FrozenWidth - ColumnResizeTheresold)
{
return(_columnSizes.FrozenCount - 1);
}
int index = _columnSizes.GetFrozenIndexOnPosition((int)pt.X - HeaderWidth);
int begin = _columnSizes.GetPositionByRealIndex(index) + HeaderWidth;
int end = begin + _columnSizes.GetSizeByRealIndex(index);
if (pt.X >= begin - ColumnResizeTheresold && pt.X <= begin + ColumnResizeTheresold)
{
return(index - 1);
}
if (pt.X >= end - ColumnResizeTheresold && pt.X <= end + ColumnResizeTheresold)
{
return(index);
}
}
else
{
int scrollXStart = _columnSizes.GetPositionByScrollIndex(FirstVisibleColumnScrollIndex);
int index = _columnSizes.GetScrollIndexOnPosition((int)pt.X - HeaderWidth - frozenWidth + scrollXStart);
int begin = _columnSizes.GetPositionByScrollIndex(index) + HeaderWidth + frozenWidth - scrollXStart;
int end = begin + _columnSizes.GetSizeByScrollIndex(index);
if (pt.X >= begin - ColumnResizeTheresold && pt.X <= begin + ColumnResizeTheresold)
{
return(index - 1 + _columnSizes.FrozenCount);
}
if (pt.X >= end - ColumnResizeTheresold && pt.X <= end + ColumnResizeTheresold)
{
return(index + _columnSizes.FrozenCount);
}
}
return(null);
}
private int?GetSeriesIndexOnPosition(double position, int headerSize, SeriesSizes series, int firstVisible)
{
if (position <= headerSize)
{
return(null);
}
int frozenSize = series.FrozenSize;
if (position <= headerSize + frozenSize)
{
return(series.GetFrozenIndexOnPosition((int)Math.Round(position - headerSize)));
}
return(series.GetScrollIndexOnPosition(
(int)Math.Round(position - headerSize - frozenSize) + series.GetPositionByScrollIndex(firstVisible)
) + series.FrozenCount);
}