cxgrid动态显示行号

uses cxLookAndFeelPainters;

type

TMyCxGrid = class(TObject)
class procedure DrawIndicatorCell(
Sender: TcxGridTableView; ACanvas: TcxCanvas;
AViewInfo: TcxCustomGridIndicatorItemViewInfo; var ADone: Boolean);
end;

{ TMyCxGrid }

class procedure TMyCxGrid.DrawIndicatorCell(Sender: TcxGridTableView;
ACanvas: TcxCanvas; AViewInfo: TcxCustomGridIndicatorItemViewInfo;
var ADone: Boolean);
var
AIndicatorViewInfo: TcxGridIndicatorRowItemViewInfo;
ATextRect: TRect;
AFont: TFont;
AFontTextColor, AColor: TColor;
begin
AFont := ACanvas.Font;
AColor := clBtnFace;
AFontTextColor := clWindowText;
if (AViewInfo is TcxGridIndicatorHeaderItemViewInfo) then
begin
ATextRect := AViewInfo.Bounds;
InflateRect(ATextRect, -1, -1);

Sender.LookAndFeelPainter.DrawHeader(ACanvas, AViewInfo.Bounds,
ATextRect, [], cxBordersAll, cxbsNormal, taCenter, vaCenter,
False, False, 'NO',AFont, AFontTextColor, AColor);
ADone := True;
end;
if not (AViewInfo is TcxGridIndicatorRowItemViewInfo) then
Exit;
ATextRect := AViewInfo.ContentBounds;
AIndicatorViewInfo := AViewInfo as TcxGridIndicatorRowItemViewInfo;
InflateRect(ATextRect, -1, -1);

if AIndicatorViewInfo.GridRecord.Selected then
AFont.Style := ACanvas.Font.Style + [fsBold]
else
AFont.Style := ACanvas.Font.Style - [fsBold];

Sender.LookAndFeelPainter.DrawHeader(ACanvas, AViewInfo.ContentBounds,
ATextRect, [], [bBottom, bLeft, bRight], cxbsNormal, taCenter, vaCenter,
False, False, IntToStr(AIndicatorViewInfo.GridRecord.Index + 1),
AFont, AFontTextColor, AColor);
ADone := True;
// ASender.LookAndFeelPainter.DrawIndicatorImage(ACanvas, ATextRect,
// AIndicatorViewInfo.IndicatorKind);

end;

procedure ShowLineNo(c: TcxGridDBTableView);
begin
c.OptionsView.Indicator := True;
c.OptionsView.IndicatorWidth := 40;
c.OnCustomDrawIndicatorCell := TMyCxGrid.DrawIndicatorCell;
end;