unit uViewContenido;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, uViewBase, cxStyles, ComCtrls, ToolWin, ActnList, cxCustomData,
  cxGraphics, cxFilter, cxData, cxDataStorage, cxEdit, DB, cxDBData,
  uDADataTable, cxGridLevel, cxClasses, cxControls, cxGridCustomView,
  cxGridCustomTableView, cxGridTableView, cxGridDBTableView, ImgList,
  PngImageList, cxGrid;

type
  IViewContenido = interface(IViewBase)
  ['{AF7F3CD1-3CD1-4F87-A4B4-FCB1320104F7}']
  end;

  TfrViewContenido = class(TfrViewBase, IViewContenido)
    ActionListContenido: TActionList;
    cxGrid: TcxGrid;
    cxGridView: TcxGridDBTableView;
    cxGridLevel: TcxGridLevel;
    DADataSource: TDADataSource;
    actAnadir: TAction;
    actEliminar: TAction;
    actSubir: TAction;
    actBajar: TAction;
    ContenidoImageList: TPngImageList;
    ToolBar1: TToolBar;
    cxStyleRepository: TcxStyleRepository;
    cxStyleEven: TcxStyle;
    cxStyleOdd: TcxStyle;
    cxStyleSelection: TcxStyle;
    procedure actAnadirExecute(Sender: TObject);
    procedure actEliminarExecute(Sender: TObject);
    procedure actEliminarUpdate(Sender: TObject);
    procedure actSubirUpdate(Sender: TObject);
    procedure actBajarExecute(Sender: TObject);
    procedure actBajarUpdate(Sender: TObject);
    procedure actSubirExecute(Sender: TObject);
  private
  protected
  public
  end;

implementation

uses uBizImportesDetalleBase, uDAInterfaces;

{$R *.dfm}

procedure TfrViewContenido.actAnadirExecute(Sender: TObject);
begin
  inherited;
  if Assigned(DADataSource.DataTable) then
    DADataSource.DataTable.Insert
end;

procedure TfrViewContenido.actEliminarExecute(Sender: TObject);
begin
  inherited;
  if Assigned(DADataSource.DataTable) then
    DADataSource.DataTable.Delete;
end;

procedure TfrViewContenido.actEliminarUpdate(Sender: TObject);
begin
  if Assigned(DADataSource.DataTable) then
    (Sender as TAction).Enabled := (not DADataSource.DataTable.IsEmpty)
  else
    (Sender as TAction).Enabled := False;
end;

procedure TfrViewContenido.actSubirUpdate(Sender: TObject);
begin
  inherited;
  if Assigned(cxGridView.Controller.FocusedRow) then
    (Sender as TAction).Enabled := not (cxGridView.Controller.FocusedRow.IsFirst)
  else
    (Sender as TAction).Enabled := False;
end;

procedure TfrViewContenido.actBajarExecute(Sender: TObject);
var
  AField : TDAField;
begin
  inherited;
  if Assigned(DADataSource.DataTable) then
  begin
    AField := DADataSource.DataTable.FindField(fld_POSICION);
    // Por si el registro está recién insertado y la posición todavía
    // no ha sido asignada.
    if (AField.AsInteger < 0) then
      DADataSource.DataTable.Post;

    IntercambiarPosiciones(DADataSource.DataTable, AField.AsInteger, AField.AsInteger + 1);
  end;
end;

procedure TfrViewContenido.actBajarUpdate(Sender: TObject);
begin
  inherited;
  if Assigned(cxGridView.Controller.FocusedRow) then
    (Sender as TAction).Enabled := not (cxGridView.Controller.FocusedRow.IsLast)
  else
    (Sender as TAction).Enabled := False;
end;

procedure TfrViewContenido.actSubirExecute(Sender: TObject);
var
  AField : TDAField;
begin
  inherited;
  if Assigned(DADataSource.DataTable) then
  begin
    AField := DADataSource.DataTable.FindField(fld_POSICION);
    // Por si el registro está recién insertado y la posición todavía
    // no ha sido asignada.
    if (AField.AsInteger < 0) then
      DADataSource.DataTable.Post;

    IntercambiarPosiciones(DADataSource.DataTable, AField.AsInteger, AField.AsInteger - 1);
  end;
end;

end.