unit uEditorDBBase;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, uEditorItem, ImgList, PngImageList, StdActns, ActnList, TBX,
  TB2Item, TB2Dock, TB2Toolbar, ComCtrls, JvExControls, JvComponent,
  JvNavigationPane, DB, uDADataTable, uEditorBase, JvFormAutoSize,
  uDAScriptingProvider, uDACDSDataTable, AppEvnts, uCustomView, uViewBase,
  JvAppStorage, JvAppRegistryStorage, JvFormPlacement,
  pngimage, ExtCtrls, dxLayoutLookAndFeels, JvComponentBase;

type
  IEditorDBBase = interface(IEditorBase)
  ['{497AE4CE-D061-4F75-A29A-320F8565FF54}']
  end;

  TfEditorDBBase = class(TfEditorBase, IEditorDBBase)
    dsDataTable: TDADataSource;
    procedure actRefrescarExecute(Sender: TObject);
    procedure actAnteriorExecute(Sender: TObject);
    procedure actSiguienteExecute(Sender: TObject);
    procedure actAnteriorUpdate(Sender: TObject);
    procedure actSiguienteUpdate(Sender: TObject);
    procedure actRefrescarUpdate(Sender: TObject);
    procedure actCancelarCambiosExecute(Sender: TObject);
    procedure actGuardarExecute(Sender: TObject);
    procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean); virtual;
    procedure actEliminarExecute(Sender: TObject);
    procedure actEliminarUpdate(Sender: TObject);
    procedure actModificarUpdate(Sender: TObject);
    procedure actPrevisualizarUpdate(Sender: TObject);
    procedure actImprimirUpdate(Sender: TObject);
  protected
    FApplyUpdates: Boolean;
    function GetModified: Boolean; override;
  published
    constructor Create(AOwner: TComponent); override;
  end;

var
  fEditorDBBase: TfEditorDBBase;

implementation

uses uExceptions, uDataTableUtils, uBizInformesBase,
  uDAInterfaces, uBizImportesDetalleBase;

{$R *.dfm}

procedure TfEditorDBBase.actRefrescarExecute(Sender: TObject);
var
  ACursor: TCursor;
  ABookmark : TBookmark;
begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
  begin
    if (dsDataTable.DataTable.IsEmpty) or (not ModifiedQuery) then
      Exit; // No continuar con el refresco

    ABookmark := dsDataTable.DataTable.GetBookMark;
//    dsDataTable.DataTable.DisableControls;  <- No descomentar

    ACursor := Screen.Cursor;
    Screen.Cursor := crHourGlass;
    try
      dsDataTable.DataTable.Refresh;

      if dsDataTable.DataTable.Dataset.BookmarkValid(ABookmark) then
        dsDataTable.DataTable.GotoBookmark(ABookmark);
    finally
      dsDataTable.DataTable.FreeBookmark(ABookmark);
//      dsDataTable.DataTable.EnableControls;   <- No descomentar
      Screen.Cursor := ACursor;
    end;
  end;
end;

procedure TfEditorDBBase.actAnteriorExecute(Sender: TObject);
begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
  begin
    if (not ModifiedQuery) then
      Exit;

    dsDataTable.DataTable.Prior;
  end;
end;

procedure TfEditorDBBase.actSiguienteExecute(Sender: TObject);
begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
  begin
    if (not ModifiedQuery) then
      Exit;

    dsDataTable.DataTable.Next;
  end;
end;

procedure TfEditorDBBase.actAnteriorUpdate(Sender: TObject);
begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
    (Sender as TAction).Enabled := not dsDataTable.DataTable.BOF
  else
    (Sender as TAction).Enabled := False;
end;

procedure TfEditorDBBase.actSiguienteUpdate(Sender: TObject);
begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
    (Sender as TAction).Enabled := not dsDataTable.DataTable.EOF
  else
    (Sender as TAction).Enabled := False;
end;

procedure TfEditorDBBase.actRefrescarUpdate(Sender: TObject);
begin
  inherited;
  if Assigned(dsDataTable.DataTable) and
    (not (dsDataTable.DataTable.State = dsInsert)) then
    (Sender as TAction).Enabled := not (dsDataTable.DataTable.Fetching or
                                        dsDataTable.DataTable.Opening or
                                        dsDataTable.DataTable.Closing)
  else
    (Sender as TAction).Enabled := False;
end;

procedure TfEditorDBBase.actCancelarCambiosExecute(Sender: TObject);
var
  dtDetails : TList;
  i : integer;
  ABookmark : TBookmark;
  ACursor : TCursor;
  AParche : IParche;
begin
  inherited;

  AParche := NIL;

  if Assigned(dsDataTable.DataTable) then
  begin
    ABookmark := dsDataTable.DataTable.GetBookMark;
    dsDataTable.DataTable.DisableControls;
//    dsDataTable.DataTable.DisableEventHandlers;  <- No descomentar

    ACursor := Screen.Cursor;
    Screen.Cursor := crHourGlass;

    { No lo pongo en try..finally para ver posibles errores }
    //try
      dsDataTable.DataTable.Cancel;

      dtDetails := dsDataTable.DataTable.GetDetailDataTables;
      for i := 0 to dtDetails.Count - 1 do
      begin
        (TDADataTable(dtDetails.Items[i])).Cancel;

        { PARCHE **********************************
           OJO: Está pensado para que sólo una de las tablas detalle
           soporte el interfaz de IParche }
        if not Assigned(AParche) and
          Supports((TDADataTable(dtDetails.Items[i])), IParche, AParche) then
          AParche.DesactivarEventos;
      end;

      dsDataTable.DataTable.CancelUpdates;

      { Comprobar si el bookmark no es válido cuando estamos cancelando la
        inserción de una fila nueva.
        CUIDADO!! Si no es válido salta una excepción. NO devuelve false!!!}
      try
        if (Assigned(ABookmark)) and
           (dsDataTable.DataTable.Dataset.BookmarkValid(ABookmark)) then
            dsDataTable.DataTable.GotoBookmark(ABookmark);
      except
      end;

      { PARCHE ********************************** }
      if Assigned(AParche) then
      begin
        AParche.ActivarEventos;
        AParche.Refrescar;
        AParche := NIL;
      end;

    //finally
      dsDataTable.DataTable.EnableControls;
      dsDataTable.DataTable.FreeBookmark(ABookmark);
//      dsDataTable.DataTable.EnableEventHandlers; <- No descomentar
      Screen.Cursor := ACursor;
    //end;
  end;
end;

procedure TfEditorDBBase.actGuardarExecute(Sender: TObject);
var
  dtDetails : TList;
  i : integer;

  ABookmark : TBookmark;

begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
  begin
    if dsDataTable.DataTable.Editing then
      dsDataTable.DataTable.Post;

    dtDetails := dsDataTable.DataTable.GetDetailDataTables;
    for i := 0 to dtDetails.Count - 1 do
      if (TDADataTable(dtDetails.Items[i])).Editing then
        (TDADataTable(dtDetails.Items[i])).Post;

//Esta parte se quitará cuando cambien los detalles de facturas, se tiene que
//volver a hacer el post de la tabla maestro porque los eventos de calculo de
//importe total de los detalles cambian el campo base imponible entre otros de
//la cabecera y luego no se hace post esto provoca que se queden deltas perdidos
//y un pete que te cagas al dar a guardar sin salir del campo importe.
    if dsDataTable.DataTable.Editing then
      dsDataTable.DataTable.Post;

    if FApplyUpdates then
    begin
//       ABookmark := dsDataTable.DataTable.GetBookMark;
       try
         dsDataTable.DataTable.ApplyUpdates;
//         if dsDataTable.DataTable.Dataset.BookmarkValid(ABookmark) then
//            dsDataTable.DataTable.GotoBookmark(ABookmark);
       finally
//         dsDataTable.DataTable.FreeBookmark(ABookmark);
       end;
    end;

    Modified := False;
  end;
end;

function TfEditorDBBase.GetModified: Boolean;
var
  dtDetails : TList;
  i : integer;
  bCambiado : Boolean;
begin
  bCambiado := False;
  if Assigned(dsDataTable.DataTable) then
  begin
    bCambiado := (dsDataTable.DataTable.State = dsEdit);

    if FApplyUpdates then
       if (not bCambiado) then
          bCambiado := DeltaValuesAreDifferent(dsDataTable.DataTable.Delta);

    if (not bCambiado) then
    begin
      dtDetails := dsDataTable.DataTable.GetDetailDataTables;
      for i := 0 to dtDetails.Count - 1 do
      begin
        bCambiado := bCambiado or ((TDADataTable(dtDetails.Items[i])).State = dsEdit);

        if FApplyUpdates then
           if (not bCambiado) then
              bCambiado := bCambiado or (DeltaValuesAreDifferent((TDADataTable(dtDetails.Items[i])).Delta));

        if bCambiado then
          Break;
      end;
    end;
  end;

  if (not bCambiado) then
    bCambiado := inherited GetModified;

  Result := bCambiado;
end;

procedure TfEditorDBBase.FormCloseQuery(Sender: TObject;
  var CanClose: Boolean);
begin
  { Para resetear el estado de la tabla en el caso de hacer un insert
    sin meter ningún dato. }
  if Assigned(dsDataTable.DataTable) and (not Modified) then
    dsDataTable.DataTable.Cancel;
  inherited;
end;

procedure TfEditorDBBase.actEliminarExecute(Sender: TObject);
var
  aObj : IApplyUpdateFailedException;
  ACursor: TCursor;
begin
  inherited;
  ACursor := Screen.Cursor;
  Screen.Cursor := crHourGlass;
  try
    if dsDataTable.DataTable.State in dsEditModes then
      dsDataTable.DataTable.Cancel;
    dsDataTable.DataTable.Delete;
    try
    
      if FApplyUpdates then
         dsDataTable.DataTable.ApplyUpdates;

      Modified := False;
    except
      on E: EDAApplyUpdateFailed do
      begin
        dsDataTable.DataTable.CancelUpdates;
        actRefrescar.Execute;        
        if Supports(dsDataTable.DataTable, IApplyUpdateFailedException, aObj) then
          aObj.ShowApplyUpdateFailed(E);
      end
      else
        raise; // Generic exception
    end;
  finally
    Screen.Cursor := ACursor;
  end;
end;

procedure TfEditorDBBase.actEliminarUpdate(Sender: TObject);
begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
    (Sender as TAction).Enabled := (not dsDataTable.DataTable.IsEmpty)
      and not (dsDataTable.DataTable.State = dsInsert)
  else
    (Sender as TAction).Enabled := False;
end;

procedure TfEditorDBBase.actModificarUpdate(Sender: TObject);
begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
    (Sender as TAction).Enabled := (not dsDataTable.DataTable.IsEmpty)
  else
    (Sender as TAction).Enabled := False;
end;

procedure TfEditorDBBase.actPrevisualizarUpdate(Sender: TObject);
begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
    (Sender as TAction).Enabled := (not dsDataTable.DataTable.IsEmpty)
  else
    (Sender as TAction).Enabled := False;
end;

procedure TfEditorDBBase.actImprimirUpdate(Sender: TObject);
begin
  inherited;
  if Assigned(dsDataTable.DataTable) then
    (Sender as TAction).Enabled := (not dsDataTable.DataTable.IsEmpty)
  else
    (Sender as TAction).Enabled := False;
end;

constructor TfEditorDBBase.Create(AOwner: TComponent);
begin
  inherited;
  FApplyUpdates := True;
end;

end.