unit uViewArticulo;

interface

uses
  Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
  Dialogs, uViewBase, ExtCtrls, StdCtrls, Buttons, DB, uDADataTable,
  DBCtrls, Grids, DBGrids, uBizArticulos, Mask, ComCtrls, uCustomView,
  JvComponent, JvFormAutoSize, cxControls, cxContainer, cxEdit, cxTextEdit,
  cxDBEdit, dxLayoutControl, cxCheckBox, PngSpeedButton, cxImage, ActnList,
  ImgList, PngImageList, cxGraphics, cxMaskEdit, cxDropDownEdit,
  uFamiliasController, uViewDatosYSeleccionProveedor, cxSpinEdit, cxCurrencyEdit,
  uArticulosController, uDAInterfaces;

type
  IViewArticulo = interface(IViewBase)
  ['{65206152-786D-47AE-A037-5EF480BC056C}']
    function GetArticulo: IBizArticulo;
    procedure SetArticulo(const Value: IBizArticulo);
    property Articulo: IBizArticulo read GetArticulo write SetArticulo;

    function GetController : IArticulosController;
    procedure SetController (const Value : IArticulosController);
    property Controller : IArticulosController read GetController write SetController;
  end;

  TfrViewArticulo = class(TfrViewBase, IViewArticulo)
    dsViewArticulo: TDADataSource;
    dxLayoutControlArticuloGroup_Root: TdxLayoutGroup;
    dxLayoutControlArticulo: TdxLayoutControl;
    dxLayoutControlArticuloGroup1: TdxLayoutGroup;
    dxLayoutControlArticuloItem3: TdxLayoutItem;
    eReferencia: TcxDBTextEdit;
    dxLayoutControlArticuloItem8: TdxLayoutItem;
    eDescripcion: TcxDBTextEdit;
    dxLayoutControlArticuloGroup2: TdxLayoutGroup;
    dxLayoutControlArticuloItem1: TdxLayoutItem;
    eNoComisionable: TcxDBCheckBox;
    dxLayoutControlArticuloGroup4: TdxLayoutGroup;
    OpenDialog1: TOpenDialog;
    SmallImages: TPngImageList;
    ActionList1: TActionList;
    actAnadir: TAction;
    actEliminar: TAction;
    dxLayoutControlArticuloItem2: TdxLayoutItem;
    PngSpeedButton2: TPngSpeedButton;
    dxLayoutControlArticuloItem5: TdxLayoutItem;
    PngSpeedButton1: TPngSpeedButton;
    dxLayoutControlArticuloGroup3: TdxLayoutGroup;
    dxLayoutControlArticuloGroup7: TdxLayoutGroup;
    eImagen: TcxImage;
    dxLayoutControlArticuloItem6: TdxLayoutItem;
    dxLayoutControlArticuloGroup5: TdxLayoutGroup;
    dxLayoutControlArticuloItem4: TdxLayoutItem;
    cbFamilia: TcxDBComboBox;
    dxLayoutControlArticuloGroup6: TdxLayoutGroup;
    dxLayoutControlArticuloItem14: TdxLayoutItem;
    frViewDatosYSeleccionProveedor1: TfrViewDatosYSeleccionProveedor;
    dxLayoutControlArticuloItem15: TdxLayoutItem;
    eReferenciaProv: TcxDBTextEdit;
    dxLayoutControlArticuloItem16: TdxLayoutItem;
    ePrecioCoste: TcxDBCurrencyEdit;
    dxLayoutControlArticuloItem17: TdxLayoutItem;
    eDescuento: TcxDBSpinEdit;
    dxLayoutControlArticuloItem18: TdxLayoutItem;
    ePrecioNeto: TcxDBCurrencyEdit;
    dxLayoutControlArticuloItem19: TdxLayoutItem;
    ePrecioPorte: TcxDBCurrencyEdit;
    dxLayoutControlArticuloGroup11: TdxLayoutGroup;
    dxLayoutControlArticuloGroup12: TdxLayoutGroup;
    dxLayoutControlArticuloItem7: TdxLayoutItem;
    cbNoInventariable: TcxDBCheckBox;
    dxLayoutControlArticuloGroup8: TdxLayoutGroup;
    dxLayoutControlArticuloItem9: TdxLayoutItem;
    ePrecioPVP: TcxDBCurrencyEdit;
    procedure actEliminarExecute(Sender: TObject);
    procedure actAnadirExecute(Sender: TObject);
    procedure cbFamiliaPropertiesInitPopup(Sender: TObject);
    procedure CustomViewCreate(Sender: TObject);
    procedure CustomViewDestroy(Sender: TObject);
    procedure cbFamiliaPropertiesValidate(Sender: TObject;
      var DisplayValue: Variant; var ErrorText: TCaption; var Error: Boolean);
    procedure CustomViewShow(Sender: TObject);
    procedure PrecioCosteChanged(Sender: TObject);
    procedure DescuentoChanged(Sender: TObject);
    procedure PrecioPVPChanged(Sender: TObject);

  private
    procedure CargarImagen;
    procedure DesactivarEventos;
    procedure ActivarEventos;


  protected
    FFamiliasController: IFamiliasController;
    FController: IArticulosController;
    FArticulo: IBizArticulo;
    FImagenModificada: Boolean;
    function GetArticulo: IBizArticulo;
    procedure SetArticulo(const Value: IBizArticulo); virtual;
    function GetController : IArticulosController;
    procedure SetController (const Value : IArticulosController);
    procedure OnProveedorChanged(Sender: TObject);

  public
    function GetModified: Boolean; override;
    procedure SetModified(const Value: Boolean); override;
    property Articulo: IBizArticulo read GetArticulo write SetArticulo;
    property Controller : IArticulosController read GetController write SetController;
  end;

implementation

uses uDataModuleArticulos, uSistemaFunc, schArticulosClient_Intf, uBizFamilias, uBizContactos;

{$R *.dfm}


{ TfrViewArticulos }

{
******************************* TfrViewArticulos ********************************
}

procedure TfrViewArticulo.actAnadirExecute(Sender: TObject);
var
  aAux : String;
begin
  eImagen.LoadFromFile;
  if Assigned(eImagen.Picture) then
  begin
    ShowHourglassCursor;
    try
      aAux := DarFicheroJPGTemporal;
      eImagen.Picture.SaveToFile(aAux);
      FController.PonerImagen(Articulo, aAux);
      FImagenModificada := True;
    finally
      DeleteFile(aAux);
      HideHourglassCursor;
    end;
  end;
end;

procedure TfrViewArticulo.actEliminarExecute(Sender: TObject);
begin
  inherited;
  eImagen.Clear;
  FController.QuitarImagen(Articulo);
  FImagenModificada := True;  
end;

procedure TfrViewArticulo.ActivarEventos;
begin
  ePrecioCoste.Properties.OnEditValueChanged := PrecioCosteChanged;
  eDescuento.Properties.OnEditValueChanged := DescuentoChanged;
  ePrecioPVP.Properties.OnEditValueChanged := PrecioPVPChanged;
end;

procedure TfrViewArticulo.CargarImagen;
var
  aAux : String;
begin
  if FArticulo.HayImagen then
  begin
    ShowHourglassCursor;
    try
      aAux := DarFicheroJPGTemporal;
      Articulo.DataTable.FieldByName(fld_ArticulosIMAGEN).SaveToFile(aAux);
      try
        eImagen.Picture.LoadFromFile(aAux);
      except
        on EInvalidGraphic do
          ShowMessage('error de imagen en el articulo');
      end;
    finally
      DeleteFile(aAux);
      HideHourglassCursor;
    end;
  end;
end;

procedure TfrViewArticulo.cbFamiliaPropertiesInitPopup(Sender: TObject);
begin
  inherited;
  with cbFamilia.Properties.Items do
  begin
    BeginUpdate;
    try
      Clear;
      AddStrings(FFamiliasController.DarListaFamilias);
    finally
      EndUpdate;
    end;
  end;
end;

procedure TfrViewArticulo.cbFamiliaPropertiesValidate(Sender: TObject;
  var DisplayValue: Variant; var ErrorText: TCaption; var Error: Boolean);
var
  AFamilias : IBizFamilia;
begin
  inherited;
  with (Sender as TcxDBComboBox) do
  begin
    if (Length(DisplayValue) > 0) and (DisplayValue <> FArticulo.FAMILIA) then
      if Properties.LookupItems.IndexOf(DisplayValue) < 0 then
      begin
        Properties.LookupItems.BeginUpdate;
        AFamilias := FFamiliasController.BuscarTodos;
        AFamilias.DataTable.Active := True;
        try
          FFamiliasController.Anadir(AFamilias);
          AFamilias.DESCRIPCION := DisplayValue;
          FFamiliasController.Guardar(AFamilias);
          Properties.LookupItems.Add(DisplayValue);
        finally
          Properties.LookupItems.EndUpdate;
          AFamilias := NIL;
        end;
      end;
  end;
end;

procedure TfrViewArticulo.CustomViewCreate(Sender: TObject);
begin
  inherited;
  FImagenModificada := False;
  FFamiliasController := TFamiliasController.Create;
end;

procedure TfrViewArticulo.CustomViewDestroy(Sender: TObject);
begin
  FFamiliasController := Nil;
  ePrecioCoste.Properties.OnEditValueChanged := Nil;
  eDescuento.Properties.OnEditValueChanged := Nil;
  inherited;
end;

procedure TfrViewArticulo.CustomViewShow(Sender: TObject);
begin
  inherited;
  ActivarEventos;
end;

procedure TfrViewArticulo.DesactivarEventos;
begin
//  eProveedor.Properties.OnEditValueChanged := OnProveedorChange;
  ePrecioCoste.Properties.OnEditValueChanged := PrecioCosteChanged;
  eDescuento.Properties.OnEditValueChanged := DescuentoChanged;
  ePrecioPVP.Properties.OnEditValueChanged := PrecioPVPChanged;
end;

procedure TfrViewArticulo.DescuentoChanged(Sender: TObject);
var
  APrecioCoste: Double;
  AAumento: Double;
begin
  APrecioCoste := 0;
  AAumento := 0;

  if eDescuento.EditModified then
  begin
    if not varIsNull(ePrecioCoste.DataBinding.Field.AsFloat) then
       APrecioCoste := ePrecioCoste.DataBinding.Field.AsFloat;

    if not varIsNull(eDescuento.DataBinding.Field.AsFloat) then
       AAumento := ((100 - eDescuento.DataBinding.Field.AsFloat)/100);

    DesactivarEventos;
    try
      ePrecioPVP.DataBinding.DataSource.Edit;
      ePrecioPVP.DataBinding.Field.AsFloat := APrecioCoste/AAumento;
    finally
      ActivarEventos;
    end;
  end;
end;

function TfrViewArticulo.GetArticulo: IBizArticulo;
begin
  Result := FArticulo;
end;

function TfrViewArticulo.GetController: IArticulosController;
begin
  Result := FController;
end;

function TfrViewArticulo.GetModified: Boolean;
begin
  Result := inherited GetModified;
  //COMPROBAMOS SI EN LA VISTA HA HABIDO CAMBIOS EN LA IMAGEN
  if not Result then
     Result := Result or FImagenModificada;
end;

procedure TfrViewArticulo.OnProveedorChanged(Sender: TObject);
begin
  if Assigned(FArticulo) then
  begin
    FArticulo.Edit;
    FArticulo.ID_PROVEEDOR := frViewDatosYSeleccionProveedor1.Proveedor.ID;
    FArticulo.DESCUENTO := frViewDatosYSeleccionProveedor1.Proveedor.DESCUENTO;
  end;
end;

procedure TfrViewArticulo.PrecioCosteChanged(Sender: TObject);
var
  APrecioCoste: Double;
  AAumento: Double;
begin
  APrecioCoste := 0;
  AAumento := 0;

  if ePrecioCoste.EditModified then
  begin
    if not varIsNull(ePrecioCoste.DataBinding.Field.AsFloat) then
       APrecioCoste := ePrecioCoste.DataBinding.Field.AsFloat;

    if not varIsNull(eDescuento.DataBinding.Field.AsFloat) then
       AAumento := ((100 - eDescuento.DataBinding.Field.AsFloat)/100);

    DesactivarEventos;
    try
      ePrecioPVP.DataBinding.DataSource.Edit;
      ePrecioPVP.DataBinding.Field.AsFloat := APrecioCoste/AAumento;
    finally
      ActivarEventos;
    end;
  end;
end;

procedure TfrViewArticulo.PrecioPVPChanged(Sender: TObject);
var
  APrecioCoste: Double;
  APrecioPVP: Double;
  AAumento : Double;
begin
  APrecioCoste := 0;
  APrecioPVP := 0;
  AAumento := 0;

  if ePrecioPVP.EditModified then
  begin
    if not varIsNull(ePrecioPVP.EditValue) then
       APrecioPVP := ePrecioPVP.EditValue;

    if not varIsNull(eDescuento.DataBinding.Field.AsFloat) then
       AAumento := (100 - eDescuento.DataBinding.Field.AsFloat);

    DesactivarEventos;
    try
      ePrecioCoste.DataBinding.DataSource.Edit;
      ePrecioCoste.DataBinding.Field.AsFloat := ((APrecioPVP*AAumento) / 100);
    finally
      ActivarEventos;
    end;
  end;

{/*

  if Assigned(FController) then
     FController.CalcularPrecioNeto(FArticulo);
}
end;

procedure TfrViewArticulo.SetArticulo(const Value: IBizArticulo);
begin
  FArticulo := Value;
  frViewDatosYSeleccionProveedor1.OnProveedorChanged := NIL;

  if Assigned(FArticulo) then
  begin
    dsViewArticulo.DataTable := FArticulo.DataTable;
    frViewDatosYSeleccionProveedor1.Controller := FController.ProveedoresController;
    frViewDatosYSeleccionProveedor1.Proveedor := (FController.ProveedoresController.Buscar(FArticulo.ID_PROVEEDOR) as IBizProveedor);
    frViewDatosYSeleccionProveedor1.OnProveedorChanged := OnProveedorChanged;

    CargarImagen;
  end
  else begin
    dsViewArticulo.DataTable := NIL;
    FArticulo := NIL;
    eImagen.Clear;
  end;
end;

procedure TfrViewArticulo.SetController(const Value: IArticulosController);
begin
  FController := Value;
end;

procedure TfrViewArticulo.SetModified(const Value: Boolean);
begin
  inherited;
  if not Value then
     FImagenModificada := False;
end;

end.