Stringgridのセル内複数行表示の色つけについて (ID：45770)

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procedure TForm1.FormCreate(Sender: TObject);
begin
     StringGrid1.Cells[1,1] := 'Ａ父Ｂと11母22'#13#10'妹33'#13#10'44弟'#13#10;  //最後改行あり
     StringGrid1.Cells[2,1] := '父'#13#10'11母22'#13#10'妹';                    //最後改行なし
     StringGrid1.Cells[3,1] := '父'#13#10'母';
     StringGrid1.Cells[4,1] := '父母';
     StringGrid1.ColWidths[1] := 100;
     StringGrid1.RowHeights[1] := 50;
end;

var
    Keys: array[0..3] of String = ('父','母','妹','弟');
    FontColors: array[0..3] of TColor = (clRed,clBlue,clGreen,clYellow);

procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;
  Rect: TRect; State: TGridDrawState);
var
    I,J,K: Integer;
    S1: String;
    DefaultColor: TColor;
    Text: String;
    BRect: TRect;
begin

if not ( gdFixed in state ) then
    begin

DefaultColor := StringGrid1.Font.Color;
      StringGrid1.Canvas.Brush.Color := StringGrid1.Color;
      StringGrid1.Canvas.FillRect(Rect);
      Text := StringGrid1.Cells[ACol,ARow]; //全体文字
      BRect := Rect;
      I := 1;
      while (I < Length (Text)) do
      begin
        K := -1;
        for J := Low ( Keys ) to High ( Keys ) do
        begin
          if Copy(Text,I,Length(Keys[J])) = Keys[J] then K := J;
        end;
        if ( K <> -1 ) then
        begin
          StringGrid1.Canvas.Font.Color := FontColors[K];
          StringGrid1.Canvas.TextRect(BRect,BRect.Left,BRect.Top,Keys[K]);
          StringGrid1.Canvas.Font.Color := DefaultColor;
          BRect.Left := BRect.Left + StringGrid1.Canvas.TextWidth(Keys[K]);
          I := I + Length (keys[K]);
        end
        else
        begin
          if ( Copy(Text,I,2) = #13#10 ) then
          begin
            BRect.Left := Rect.Left;
            BRect.Top  := BRect.Top + StringGrid1.Canvas.TextHeight('A'); //A は適当
            Inc(I);
          end
          else
          begin
            S1 := Copy(Text,I,1);
            StringGrid1.Canvas.TextRect(BRect,BRect.Left,BRect.Top,S1);
            BRect.Left := BRect.Left + StringGrid1.Canvas.TextWidth(S1);
          end;
          Inc(I);
        end;
      end;

StringGrid1.Canvas.Font.Color := DefaultColor;
    end;

end;

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