public void deleteForm() {
    final Object itemId = view.getTable().getValue();

    if (itemId != null) {
      ConfirmDialog.Listener konfirmDialogListener =
          new ConfirmDialog.Listener() {
            @Override
            public void onClose(ConfirmDialog dialog) {
              if (dialog.isConfirmed()) {
                // Confirmed to continue
                try {
                  model.getsMerkJpaService().removeObject(model.getItemHeader());

                  model.getBeanItemContainerHeader().removeItem(itemId);

                  view.getTable().refreshRowCache();
                  view.setDisplay();
                  Notification.show("Delete Sukses", Notification.TYPE_TRAY_NOTIFICATION);
                } catch (Exception ex) {
                  Notification.show("Error Delete!!", Notification.TYPE_TRAY_NOTIFICATION);
                }
              } else {
                // User did not confirm
              }
              view.getTable().focus();
            }
          };

      final ConfirmDialog d =
          ConfirmDialog.show(
              view.getUI(),
              "Konfirmasi Hapus",
              "Yakin akan hapus data?",
              "Oke Delete..",
              "Cancel",
              konfirmDialogListener);

      final ShortcutListener enter =
          new ShortcutListener("Oke", KeyCode.ENTER, null) {
            @Override
            public void handleAction(Object sender, Object target) {
              d.close();
            }
          };

      d.setStyleName("dialog");
      d.getOkButton().setStyleName("small");
      d.getCancelButton().setStyleName("small");
      d.focus();

    } else {
      Notification.show("Tidak ada yang dipilih!!!", Notification.TYPE_TRAY_NOTIFICATION);
    }
  }
  public int discardForm() {
    ConfirmDialog discardDialog =
        ConfirmDialog.show(
            view.getUI(),
            "Konfirmasi Discard",
            "Yakin keluar mode editing(discard)?",
            "Yes",
            "No",
            new ConfirmDialog.Listener() {
              public void onClose(ConfirmDialog dialog) {
                if (dialog.isConfirmed()) {
                  // Confirmed to continue
                  try {
                    // 1. form discard
                    model.getBinderHeader().discard();
                    model.setOperationStatus(EnumOperationStatus.OPEN.getStrCode());
                    view.setFormButtonAndTextState();
                    // 2. focust ke table
                    view.getTable().focus();

                  } catch (Exception ex) {
                    Notification.show(
                        "Terjadi Kesalahan Discard", Notification.TYPE_TRAY_NOTIFICATION);
                  }
                  view.closeWindowForm();
                } else {
                  view.focustIdOrDesc();
                }
              }
            });
    discardDialog.setStyleName("dialog");
    discardDialog.getOkButton().setStyleName("small");
    discardDialog.getCancelButton().setStyleName("small");
    // Jangan lupa
    discardDialog.focus();

    return 0;
  }
  @Override
  public void buttonClick(ClickEvent event) {
    // TODO Auto-generated method stub
    // Antisipasi
    if (model.getOperationStatus() == null)
      model.setOperationStatus(EnumOperationStatus.OPEN.getStrCode());
    if (model.getOperationStatus().equals(""))
      model.setOperationStatus(EnumOperationStatus.OPEN.getStrCode());

    if (event.getButton() == view.getBtnNewForm()) {
      addItem();
      view.showWindowForm();
    } else if (event.getButton() == view.getBtnEditForm()) {
      view.showWindowForm();
    } else if (event.getButton() == view.getBtnDeleteForm()) {
      deleteForm();
    } else if (event.getButton() == view.getBtnSaveForm()) {
      ConfirmDialog commitDialog =
          ConfirmDialog.show(
              view.getUI(),
              "Konfirmasi Simpan",
              "Simpan Data?",
              "Save",
              "No",
              new ConfirmDialog.Listener() {
                public void onClose(ConfirmDialog dialog) {
                  if (dialog.isConfirmed()) {
                    // Confirmed to continue
                    try {
                      if (model
                          .getOperationStatus()
                          .equals(EnumOperationStatus.ADDING.getStrCode())) {
                        if (insertAndValidateForm() == 0) {
                          view.getTable().focus();
                          view.closeWindowForm();
                        } else {
                          view.focustIdOrDesc();
                        }
                      } else if (model
                          .getOperationStatus()
                          .equals(EnumOperationStatus.EDITING.getStrCode())) {
                        if (updateAndValidateForm() == 0) {
                          view.getTable().focus();
                          view.closeWindowForm();
                        } else {
                          view.focustIdOrDesc();
                        }
                      }

                    } catch (Exception ex) {
                      Notification.show("Terjadi Kesalahan Simpan");
                    }

                  } else {
                    view.focustIdOrDesc();
                  }
                }
              });
      commitDialog.setStyleName("dialog");
      commitDialog.getOkButton().setStyleName("small");
      commitDialog.getCancelButton().setStyleName("small");
      // Jangan lupa
      commitDialog.focus();

    } else if (event.getButton() == view.getBtnCancelForm()) {
      if (model.getOperationStatus().equals(EnumOperationStatus.ADDING.getStrCode())) {
        discardForm();
      } else if (model.getOperationStatus().equals(EnumOperationStatus.ADDING.getStrCode())
          || model.getOperationStatus().equals(EnumOperationStatus.EDITING.getStrCode())) {
        if (view.getFormLayout().isVisible()) {
          discardForm();
        }
      } else {
        view.getTable().focus();
      }

      //			discardForm(operationStatus);
    } else if (event.getButton() == view.getBtnSearch()) {
      searchForm();
    } else if (event.getButton() == view.getBtnPrint()) {
      printForm();
    } else if (event.getButton() == view.getBtnHelp()) {
      helpForm();
    } else if (event.getButton() == view.getBtnUtility()) {
      view.showWindowUtility();
    }
    // Tidak semua akan di refresh container nya >> Jadi refresh container tidak bisa di taruh
    // disini

  }