Report designer in mdi child mode

Comments

• AlexTZ

  November 2006 edited 4:06AM

  You can run only one instance of FastReport designer. It's by design.
• ccy

  November 2006 edited 4:06AM

  Will this behavior be enhanced in next version? It doesn't seems a good design in term of OO. I can create more than one instance of designer in Report Builder and it works fine.
  
  Another problem I found out is we can't open 2 preview windows at the same time in Fast Report. Is this the same problem too?
• AlexTZ

  November 2006 edited 4:06AM

  This is impossible now due to docking behavior.
  Regarding preview: one TfrxReport can open one preview window. If you need 2 - use 2 TfrxReport.
• ccy

  November 2006 edited November 2006

  Even if each TfrxReport may open a preview window. But it will cause problem in some unexpected situation due to the DatasetList found in the following procedure in unit frxClass:

  function frxFindDataSet(DataSet: TfrxDataSet; const Name: String;
    Owner: TComponent): TfrxDataSet;
  var
    i: Integer;
    ds: TfrxDataSet;
  begin
    Result := DataSet;
    if Name = '' then
    begin
      Result := nil;
      Exit;
    end;
    if Owner = nil then Exit;
    DatasetList.Lock;
    for i := 0 to DatasetList.Count - 1 do
    begin
      ds := DatasetList[i];
      if AnsiCompareText(ds.UserName, Name) = 0 then
        if not ((Owner is TfrxReport) and (ds.Owner is TfrxReport) and
          (ds.Owner <> Owner)) then
        begin
          Result := DatasetList[i];
          break;
        end;
    end;
    DatasetList.Unlock;
  end;
  

  
  If we have multi instance of TfrxReport but those DataSet store in DataSetList has same UserName, the report output won't get display correctly. I am not sure you able to figure out what's wrong with this singleton design. If you don't, I will provide an example to illustrate this.