MyGridViewInfo.cs

using DevExpress.XtraGrid.Views.Grid;
using DevExpress.XtraGrid.Views.Grid.ViewInfo;
using System;
using System.Collections.Generic;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace T263441 {
    public class MyGridViewInfo : GridViewInfo {
        public MyGridViewInfo(DevExpress.XtraGrid.Views.Grid.GridView gridView) : base(gridView) { }

        protected override void CalcRowFooterInfo(GridRowInfo ri, GridRow row, GridRow nextRow) {
            int height = ri.RowFooters.RowFootersHeight;
            if(height == 0)
                return;

            bool isShowCurrentFooter = IsShowCurrentRowFooter(ri);
            int startLevel = ri.Level;
            int footerRowHandle = ri.RowHandle;

            if(!ri.IsGroupRow || !isShowCurrentFooter)
                footerRowHandle = View.GetParentRowHandle(footerRowHandle);

            if(!isShowCurrentFooter) {
                startLevel--;
            }

            int top = ri.TotalBounds.Bottom - height - ri.RowSeparatorBounds.Height;
            int left = ri.IndentRect.Right - (!isShowCurrentFooter ? LevelIndent : 0);
            ri.RowFooters.Bounds = new Rectangle(left, top, ri.DataBounds.Right - left, height);

            for(int n = 0; n < ri.RowFooters.RowFooterCount; n++) {
                var parentRowVal = View.GetGroupRowValue(View.GetParentRowHandle(footerRowHandle));

                if(parentRowVal != null && parentRowVal.ToString() == string.Empty) {
                    startLevel -= 1;
                    left -= LevelIndent;
                    ri.RowFooters.RowFooterCount += 1;
                    footerRowHandle = View.GetParentRowHandle(footerRowHandle);

                    continue;
                }

                GridRowFooterInfo fi = new GridRowFooterInfo();
                ri.RowFooters.Add(fi);
                fi.RowHandle = footerRowHandle;
                fi.Bounds = ri.Bounds;
                fi.Level = startLevel;
                fi.Bounds.Y = top;
                fi.Bounds.X = left;
                fi.Bounds.Width = ri.DataBounds.Right - fi.Bounds.Left;
                fi.Bounds.Height = GroupFooterHeight;
                top += fi.Bounds.Height;

                if(!ri.IndicatorRect.IsEmpty) {
                    fi.IndicatorRect = ri.IndicatorRect;
                    fi.IndicatorRect.Y = fi.Bounds.Y;
                    fi.IndicatorRect.Height = fi.Bounds.Height;
                }

                if(View.OptionsView.ShowHorizontalLines != DevExpress.Utils.DefaultBoolean.False) {
                    ri.AddRowLineInfo(fi.Bounds.Left, fi.Bounds.Bottom - 1,
                        fi.Bounds.Width, 1, PaintAppearance.HorzLine);
                    fi.Bounds.Height -= 1;
                }

                CalcRowCellsFooterInfo(fi, ri);
                footerRowHandle = View.GetParentRowHandle(footerRowHandle);
                startLevel--;
                left -= LevelIndent;
            }
        }

        public override int GetRowFooterCount(int rowHandle, int rowVisibleIndex, bool isExpanded) {
            int initialVisibleFootersCount = base.GetRowFooterCount(rowHandle, rowVisibleIndex, isExpanded);
            int visibleFootersCount = initialVisibleFootersCount;

            int footerRowHandle = rowHandle;
            for(int i = 0; i < initialVisibleFootersCount; i++) {
                var parentRowVal = View.GetGroupRowValue(View.GetParentRowHandle(footerRowHandle));

                if(parentRowVal != null && parentRowVal.ToString() == string.Empty) 
                    visibleFootersCount--;

                footerRowHandle = View.GetParentRowHandle(footerRowHandle);
            }

            return visibleFootersCount;
        }

    }


}