+$form = new Form('invoiceForm');
+// Hidden control for invoice id.
+$form->addInput(array('type'=>'hidden','name'=>'id','value'=>$cl_invoice_id));
+// invoiceForm only contains controls for "Mark paid" block below invoice table.
+if ($user->isPluginEnabled('ps')) {
+ $mark_paid_action_options = array('1'=>$i18n->get('dropdown.paid'),'2'=>$i18n->get('dropdown.not_paid'));
+ $form->addInput(array('type'=>'combobox',
+ 'name'=>'mark_paid_action_options',
+ 'data'=>$mark_paid_action_options,
+ 'value'=>$cl_mark_paid_action_option));
+ $form->addInput(array('type'=>'submit','name'=>'btn_mark_paid','value'=>$i18n->get('button.submit')));
+}
+
+if ($request->isPost()) {
+ if ($request->getParameter('btn_mark_paid')) {
+ // User clicked the "Mark paid" button to mark all invoice items either paid or not paid.
+
+ // Determine user action.
+ $mark_paid = $request->getParameter('mark_paid_action_options') == 1 ? true : false;
+ ttInvoiceHelper::markPaid($cl_invoice_id, $mark_paid);
+
+ // Re-display this form.
+ header('Location: invoice_view.php?id='.$cl_invoice_id);
+ exit();
+ }
+}
+
+$smarty->assign('forms', array($form->getName()=>$form->toArray()));
+$smarty->assign('invoice_id', $cl_invoice_id);