Don't let users post negative invoices. (#166864)

Pop up an error dialog and prevent the post.



git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@13304 57a11ea4-9604-0410-9ed3-97b8803252fd

ChangeLog

@@ -53,6 +53,10 @@
 	  - Prefer QUERY_AND and QUERY_OR over NAND, NOR, XOR
 	  - Don't randomly generate a gnc_numeric with a 0 denominator.
 
+	* src/business/business-gnome/dialog-invoice.c:
+	  Don't let users post negative invoices.  (#166864)
+	  Pop up an error dialog and prevent the post.
+
 2006-02-18  Derek Atkins  <derek@ihtfp.com>
 
 	* intl-scm/xgettext.scm: remove the absolute path from filenames

src/business/business-gnome/dialog-invoice.c

@@ -610,6 +610,20 @@ gnc_invoice_window_postCB (GtkWidget *widget, gpointer data)
     return;
   }
 
+  /* Make sure that the invoice has a positive balance */
+  if (gnc_numeric_negative_p(gncInvoiceGetTotal(invoice))) {
+    gnc_error_dialog(iw_get_window(iw),
+		     _("You may not post an invoice with a negative total value."));
+    return;
+  }
+
+  if (iw->total_cash_label &&
+      gnc_numeric_negative_p(gncInvoiceGetTotalOf(invoice, GNC_PAYMENT_CASH))) {
+    gnc_error_dialog(iw_get_window(iw),
+		     _("You may not post an expense voucher with a negative total cash value."));
+    return;
+  }
+
   /* Ok, we can post this invoice.  Ask for verification, set the due date,
    * post date, and posted account
    */