Expand or Collapse Groups in code

How does one collapse all or expand all groups in a report preview with code? I have a report in a frxpreview 'form' and I want to emulate the context menu popup functionality available to collapse or expand all groups in the 'regular' report preview.

Thanks,

Dennis

Comments

  • gpigpi
    edited 6:33AM
    procedure TForm1.Button1Click(Sender: TObject);
    var
      l: TList;
      i: Integer;
      c: TfrxComponent;
    begin
      Preview.Lock;
      l := Report.AllObjects;
      for i := 0 to l.Count - 1 do
      begin
        c := l[i];
        if (c is TfrxGroupHeader) and TfrxGroupHeader(c).DrillDown then
          TfrxGroupHeader(c).ExpandDrillDown := True;
      end;
      Report.DrillState.Clear;
      Preview.RefreshReport;
    end;
    
    procedure TForm1.Button2Click(Sender: TObject);
    var
      l: TList;
      i: Integer;
      c: TfrxComponent;
    begin
      Preview.Lock;
      l := Report.AllObjects;
      for i := 0 to l.Count - 1 do
      begin
        c := l[i];
        if (c is TfrxGroupHeader) and TfrxGroupHeader(c).DrillDown then
          TfrxGroupHeader(c).ExpandDrillDown := False;
      end;
      Report.DrillState.Clear;
      Preview.RefreshReport;
      Preview.SetPosition(0,0);
    end;
    
  • edited 6:33AM
    Thanks, 'gpi'. Just what I needed.

    Cheers,

    Dennis
  • edited July 2014
    Can anyone give me the Pascal equilvalenbt of this code??

    gpi wrote: »
    procedure TForm1.Button1Click(Sender: TObject);
    var
      l: TList;
      i: Integer;
      c: TfrxComponent;
    begin
      Preview.Lock;
      l := Report.AllObjects;
      for i := 0 to l.Count - 1 do
      begin
        c := l[i];
        if (c is TfrxGroupHeader) and TfrxGroupHeader(c).DrillDown then
          TfrxGroupHeader(c).ExpandDrillDown := True;
      end;
      Report.DrillState.Clear;
      Preview.RefreshReport;
    end;
    
    procedure TForm1.Button2Click(Sender: TObject);
    var
      l: TList;
      i: Integer;
      c: TfrxComponent;
    begin
      Preview.Lock;
      l := Report.AllObjects;
      for i := 0 to l.Count - 1 do
      begin
        c := l[i];
        if (c is TfrxGroupHeader) and TfrxGroupHeader(c).DrillDown then
          TfrxGroupHeader(c).ExpandDrillDown := False;
      end;
      Report.DrillState.Clear;
      Preview.RefreshReport;
      Preview.SetPosition(0,0);
    end;
    

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