+sub setup_is_action_bar {
+  my ($tmpl_var)              = @_;
+  my $form                    = $::form;
+  my $change_never            = $::instance_conf->get_is_changeable == 0;
+  my $change_on_same_day_only = $::instance_conf->get_is_changeable == 2 && ($form->current_date(\%::myconfig) ne $form->{gldate});
+  my $payments_balanced       = ($::form->{oldtotalpaid} == 0);
+  my $has_storno              = ($::form->{storno} && !$::form->{storno_id});
+  my $may_edit_create         = $::auth->assert('invoice_edit', 1);
+  my $factur_x_enabled        = $tmpl_var->{invoice_obj} && $tmpl_var->{invoice_obj}->customer->create_zugferd_invoices_for_this_customer;
+  my ($is_linked_bank_transaction, $warn_unlinked_delivery_order);
+    if ($::form->{id}
+        && SL::DB::Default->get->payments_changeable != 0
+        && SL::DB::Manager::BankTransactionAccTrans->find_by(ar_id => $::form->{id})) {
+
+      $is_linked_bank_transaction = 1;
+    }
+  if ($::instance_conf->get_warn_no_delivery_order_for_invoice && !$form->{id}) {
+    $warn_unlinked_delivery_order = 1 unless $form->{convert_from_do_ids};
+  }
+  for my $bar ($::request->layout->get('actionbar')) {
+    $bar->add(
+      action => [
+        t8('Update'),
+        submit    => [ '#form', { action => "update" } ],
+        disabled  => !$may_edit_create ? t8('You must not change this invoice.')
+                   : $form->{locked}   ? t8('The billing period has already been locked.')
+                   :                     undef,
+        id        => 'update_button',
+        accesskey => 'enter',
+      ],
+
+      combobox => [
+        action => [
+          t8('Post'),
+          submit   => [ '#form', { action => "post" } ],
+          checks   => [ 'kivi.validate_form' ],
+          confirm  => t8('The invoice is not linked with a sales delivery order. Post anyway?') x !!$warn_unlinked_delivery_order,
+          disabled => !$may_edit_create                         ? t8('You must not change this invoice.')
+                    : $form->{locked}                           ? t8('The billing period has already been locked.')
+                    : $form->{storno}                           ? t8('A canceled invoice cannot be posted.')
+                    : ($form->{id} && $change_never)            ? t8('Changing invoices has been disabled in the configuration.')
+                    : ($form->{id} && $change_on_same_day_only) ? t8('Invoices can only be changed on the day they are posted.')
+                    : $is_linked_bank_transaction               ? t8('This transaction is linked with a bank transaction. Please undo and redo the bank transaction booking if needed.')
+                    :                                             undef,
+        ],
+        action => [
+          t8('Post Payment'),
+          submit   => [ '#form', { action => "post_payment" } ],
+          checks   => [ 'kivi.validate_form' ],
+          disabled => !$may_edit_create           ? t8('You must not change this invoice.')
+                    : !$form->{id}                ? t8('This invoice has not been posted yet.')
+                    : $is_linked_bank_transaction ? t8('This transaction is linked with a bank transaction. Please undo and redo the bank transaction booking if needed.')
+                    :                               undef,
+          only_if  => $form->{type} ne "invoice_for_advance_payment",
+        ],
+        action => [ t8('Mark as paid'),
+          submit   => [ '#form', { action => "mark_as_paid" } ],
+          confirm  => t8('This will remove the invoice from showing as unpaid even if the unpaid amount does not match the amount. Proceed?'),
+          disabled => !$may_edit_create ? t8('You must not change this invoice.')
+                    : !$form->{id}      ? t8('This invoice has not been posted yet.')
+                    :                     undef,
+          only_if  => $::instance_conf->get_is_show_mark_as_paid && $form->{type} ne "invoice_for_advance_payment",
+        ],
+      ], # end of combobox "Post"
+
+      combobox => [
+        action => [ t8('Storno'),
+          submit   => [ '#form', { action => "storno" } ],
+          confirm  => t8('Do you really want to cancel this invoice?'),
+          checks   => [ 'kivi.validate_form' ],
+          disabled => !$may_edit_create   ? t8('You must not change this invoice.')
+                    : !$form->{id}        ? t8('This invoice has not been posted yet.')
+                    : $form->{storno}     ? t8('Cannot storno storno invoice!')
+                    : $form->{locked}     ? t8('The billing period has already been locked.')
+                    : !$payments_balanced ? t8('Cancelling is disallowed. Either undo or balance the current payments until the open amount matches the invoice amount')
+                    : undef,
+        ],
+        action => [ t8('Delete'),
+          submit   => [ '#form', { action => "delete" } ],
+          confirm  => t8('Do you really want to delete this object?'),
+          checks   => [ 'kivi.validate_form' ],
+          disabled => !$may_edit_create        ? t8('You must not change this invoice.')
+                    : !$form->{id}             ? t8('This invoice has not been posted yet.')
+                    : $form->{locked}          ? t8('The billing period has already been locked.')
+                    : $change_never            ? t8('Changing invoices has been disabled in the configuration.')
+                    : $change_on_same_day_only ? t8('Invoices can only be changed on the day they are posted.')
+                    : $has_storno              ? t8('Can only delete the "Storno zu" part of the cancellation pair.')
+                    :                            undef,
+        ],
+      ], # end of combobox "Storno"
+
+      'separator',
+
+      combobox => [
+        action => [ t8('Workflow') ],
+        action => [
+          t8('Use As New'),
+          submit   => [ '#form', { action => "use_as_new" } ],
+          checks   => [ 'kivi.validate_form' ],
+          disabled => !$may_edit_create ? t8('You must not change this invoice.')
+                    : !$form->{id}      ? t8('This invoice has not been posted yet.')
+                    :                     undef,
+        ],
+        action => [
+          t8('Credit Note'),
+          submit   => [ '#form', { action => "credit_note" } ],
+          checks   => [ 'kivi.validate_form' ],
+          disabled => !$may_edit_create              ? t8('You must not change this invoice.')
+                    : $form->{type} eq "credit_note" ? t8('Credit notes cannot be converted into other credit notes.')
+                    : !$form->{id}                   ? t8('This invoice has not been posted yet.')
+                    : $form->{storno}                ? t8('A canceled invoice cannot be used. Please undo the cancellation first.')
+                    :                                  undef,
+        ],
+        action => [
+          t8('Sales Order'),
+          submit   => [ '#form', { action => "order" } ],
+          checks   => [ 'kivi.validate_form' ],
+          disabled => !$form->{id} ? t8('This invoice has not been posted yet.') : undef,
+        ],
+      ], # end of combobox "Workflow"
+
+      combobox => [
+        action => [ t8('Export') ],
+        action => [
+          ($form->{id} ? t8('Print') : t8('Preview')),
+          call     => [ 'kivi.SalesPurchase.show_print_dialog', $form->{id} ? 'print' : 'preview' ],
+          checks   => [ 'kivi.validate_form' ],
+          disabled => !$may_edit_create               ? t8('You must not print this invoice.')
+                    : !$form->{id} && $form->{locked} ? t8('The billing period has already been locked.')
+                    :                                   undef,
+        ],
+        action => [ t8('Print and Post'),
+          call     => [ 'kivi.SalesPurchase.show_print_dialog', 'print_and_post' ],
+          checks   => [ 'kivi.validate_form' ],
+          confirm  => t8('The invoice is not linked with a sales delivery order. Post anyway?') x !!$warn_unlinked_delivery_order,
+          disabled => !$may_edit_create                         ? t8('You must not change this invoice.')
+                    : $form->{locked}                           ? t8('The billing period has already been locked.')
+                    : $form->{storno}                           ? t8('A canceled invoice cannot be posted.')
+                    : ($form->{id} && $change_never)            ? t8('Changing invoices has been disabled in the configuration.')
+                    : ($form->{id} && $change_on_same_day_only) ? t8('Invoices can only be changed on the day they are posted.')
+                    : $is_linked_bank_transaction               ? t8('This transaction is linked with a bank transaction. Please undo and redo the bank transaction booking if needed.')
+                    :                                             undef,
+        ],
+        action => [ t8('E Mail'),
+          call     => [ 'kivi.SalesPurchase.show_email_dialog' ],
+          checks   => [ 'kivi.validate_form' ],
+          disabled => !$may_edit_create       ? t8('You must not print this invoice.')
+                    : !$form->{id}            ? t8('This invoice has not been posted yet.')
+                    : $form->{postal_invoice} ? t8('This customer wants a postal invoices.')
+                    :                     undef,
+        ],
+        action => [ t8('Factur-X/ZUGFeRD'),
+          submit   => [ '#form', { action => "download_factur_x_xml" } ],
+          checks   => [ 'kivi.validate_form' ],
+          disabled => !$may_edit_create  ? t8('You must not print this invoice.')
+                    : !$form->{id}       ? t8('This invoice has not been posted yet.')
+                    : !$factur_x_enabled ? t8('Creating Factur-X/ZUGFeRD invoices is not enabled for this customer.')
+                    :                      undef,
+        ],
+      ], # end of combobox "Export"
+
+      combobox => [
+        action => [ t8('more') ],
+        action => [
+          t8('History'),
+          call     => [ 'set_history_window', $form->{id} * 1, 'glid' ],
+          disabled => !$form->{id} ? t8('This invoice has not been posted yet.') : undef,
+        ],
+        action => [
+          t8('Follow-Up'),
+          call     => [ 'follow_up_window' ],
+          disabled => !$form->{id} ? t8('This invoice has not been posted yet.') : undef,
+        ],
+        action => [
+          t8('Drafts'),
+          call     => [ 'kivi.Draft.popup', 'is', 'invoice', $form->{draft_id}, $form->{draft_description} ],
+          disabled => !$may_edit_create ? t8('You must not change this invoice.')
+                    :  $form->{id}      ? t8('This invoice has already been posted.')
+                    : $form->{locked}   ? t8('The billing period has already been locked.')
+                    :                     undef,
+        ],
+      ], # end of combobox "more"
+    );
+  }
+  $::request->layout->add_javascripts('kivi.Validator.js');
+}
+