Question

Hi does anyone know if it is possible to display a picture as a background to a string grid, Or is anyone aware of any free Grid component that can do this.

Thanks

colin

Answer 1

You could use a TDrawGrid (or a TStringGrid), which supports owner-drawing, and do

procedure TForm1.FormCreate(Sender: TObject);
begin
  FBg := TBitmap.Create;
  FBg.LoadFromFile('C:\Users\Andreas Rejbrand\Pictures\Sample.bmp');
end;

where FBg is a TBitmap (in the form class, for instance), and then do

procedure TForm1.StringGrid1DrawCell(Sender: TObject; ACol, ARow: Integer;
  Rect: TRect; State: TGridDrawState);
var
  r: TRect;
begin
  if not (Sender is TStringGrid) then Exit;
  BitBlt(TStringGrid(Sender).Canvas.Handle,
         Rect.Left,
         Rect.Top,
         Rect.Right - Rect.Left,
         Rect.Bottom - Rect.Top,
         FBg.Canvas.Handle,
         Rect.Left,
         Rect.Top,
         SRCCOPY);
  if gdSelected in State then
    InvertRect(TStringGrid(Sender).Canvas.Handle, Rect);
  r := Rect;
  TStringGrid(Sender).Canvas.Brush.Style := bsClear;
  DrawText(TStringGrid(Sender).Canvas.Handle,
           TStringGrid(Sender).Cells[ACol, ARow],
           length(TStringGrid(Sender).Cells[ACol, ARow]),
           r,
           DT_SINGLELINE or DT_VCENTER or DT_END_ELLIPSIS);
end;