Is it possible to determine if the text in a dbEdit is longer than what is visible?

Question

On some forms I have dbEdits that sometimes aren't wide enough to show all the text their fields may contain. For them I have the following code:

procedure Tgm12edLots.dbeLotNameMouseEnter(Sender: TObject);
begin
  with dbeLotName do begin
    ShowHint := True;
    Hint := Text;
  end;
end;

I'd like to avoid the hint showing if all the text is visible, but I don't how to test for that condition.

Thanks for any tips/suggestions!

Answer 1

I think this should work...

function CanShowAllText(Edit: TDBEdit):Boolean;
var
    TextWidth:Integer;
    VisibleWidth: Integer;
    Bitmap: TBitmap;
const
//This could be worked out but without delphi I can't remember all that goes into it.
    BordersAndMarginsWidthEtc = 4;
begin
    Bitmap := TBitmap.Create;
    try
        Bitmap.Canvas.Font.Assign(Edit.Font);
        TextWidth := Bitmap.Canvas.TextWidth(Edit.Text);
        VisibleWidth := Edit.Width - BordersAndMarginsWidthEtc;
        Result := TextWidth < VisibleWidth;
    finally
        Bitmap.Free;
    end;
end;