Create and Destroy objects at runtime

J.C. ArteagaJ.C. Arteaga
edited 3:19AM in FastReport 4.0
I need to create some objects (tfrxMemoview) for every record in the report, then number of objects may vary from one record to another. I am using the followin code in the MasterDataOnbeforeprint event:
procedure MasterData1OnBeforePrint(Sender: TfrxComponent);
var
  s : string;
  i : integer;
  dLeft,dWidth : double;                                    
begin
  if <Cheques."POS"> = 'S' then
  begin
    picLogoS.DataField := 'LogoBanco';  
    picLogoI.Datafield := 'Logo';                                                                                         
  end
  else            
  begin
    picLogoI.DataField := 'LogoBanco';  
    picLogoS.Datafield := 'Logo';                                                                                         
  end;
  ChequesSimbolo.left := 653.86;                                                                                
  dWidth := ChequesSimbolo.width / 2;        
  dLeft := ChequesSimbolo.left + dwidth;
  ChequesSimbolo.Left := dLeft - ChequesSimbolo.width - (Length(<Cheques."MONTOSTR">) * dWidth);                                                                                            
  for i:= Length(<Cheques."MONTOSTR">) downto 1 do
  begin
    s := Copy(<Cheques."MONTOSTR">,i,1);
    with TfrxMemoView.Create(MasterData1) do
    begin
      Memo.text := s;
      Left := dLeft;
      AutoWidth := false;                                                     
      width := dWidth;
      Color := ChequesSimbolo.color;
      Font := chequesSimbolo.font;        
      Height := ChequesSimbolo.Height;
      Top := ChequesSimbolo.Top;                                                              
      HAlign := haCenter;
      VAlign := vaCenter;
    end;
    if i > 1 then                                       
      dLeft := dLeft - dWidth;  
  end;
  ChequesSimbolo.left := dleft - ChequesSimbolo.Width;                                                                
  frmSombra.left := ChequesSimbolo.left;                                                                                     
end;

It's work fine, however I need to destroy them for the next record, because some records needs less objects than others.

How can I do that?
Should I change my code?

Thanks in advance.

J.C. Arteaga
ARTESOFT

Comments

  • gordkgordk St.Catherines On. Canada.
    edited 3:19AM
    instead of continually creating why not just put the memoview in the design and control its visibility and content and position
  • J.C. ArteagaJ.C. Arteaga
    edited 3:19AM
    Finally I did it creating an array:
    var
  aMemos : array[1..10] of TfrxMemoView;
  aLiteral : array[1..10] of TfrxMemoView;

procedure MasterData1OnBeforePrint(Sender: TfrxComponent);
var
  s : string;
  i : integer;
  dLeft,dWidth : double;
begin
  if <Cheques."POS"> = 'S' then
  begin
    picLogoS.DataField := 'LogoBanco';  
    picLogoI.Datafield := 'Logo';                                                                                         
  end
  else            
  begin
    picLogoI.DataField := 'LogoBanco';  
    picLogoS.Datafield := 'Logo';                                                                                         
  end;
  ChequesSimbolo.left := 653.86;                                                                                
  dWidth := ChequesSimbolo.width / 2;        
  dLeft := ChequesSimbolo.left + dwidth;
  ChequesSimbolo.Left := dLeft - ChequesSimbolo.width - (Length(<Cheques."MONTOSTR">) * dWidth);                                                                                            
  for i:= Length(<Cheques."MONTOSTR">) downto 1 do
  begin
    s := Copy(<Cheques."MONTOSTR">,i,1);
    aMemos[i] := TfrxMemoView.Create(MasterData1);                                   
    with aMemos[i] do
    begin
      Memo.text := s;
      Left := dLeft;
      AutoWidth := false;                                                     
      width := dWidth;
      Color := ChequesSimbolo.color;
      Font := chequesSimbolo.font;        
      Height := ChequesSimbolo.Height;
      Top := ChequesSimbolo.Top;                                                              
      HAlign := haCenter;
      VAlign := vaCenter;
    end;
    aLiteral[i] := TfrxMemoView.Create(MasterData1);                                             
    with aLiteral[i] do
    begin
      Memo.Text := Literal(s);                                                          
      Left := dLeft;
      AutoWidth := false;                                                     
      width := dWidth;
      Color := frmSombra.color;
      Font := frmSombra.font;        
      Height := frmSombra.Height;
      Top := frmSombra.Top;                                                              
      HAlign := haCenter;
      VAlign := vaCenter;
    end;              
    if i > 1 then                                       
      dLeft := dLeft - dWidth;  
  end;
  ChequesSimbolo.left := dleft - ChequesSimbolo.Width;                                                                
  frmSombra.left := ChequesSimbolo.left;                                                                                     
end;

procedure MasterData1OnAfterPrint(Sender: TfrxComponent);
var
   i : integer;                                        
begin
 for i:= Length(<Cheques."MONTOSTR">) downto 1 do
 begin             
   aMemos[i].free;
   aLiteral[i].free;
 end;                
end;
    Thank you

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