gtk: manually implement gtk_print_operation_get_error

Author: lucab

gtk/src/lib.rs

@@ -99,6 +99,7 @@ mod pad_action_entry;
 #[cfg(any(feature = "v3_22", feature = "dox"))]
 mod pad_controller;
 mod page_range;
+mod print_operation;
 mod print_settings;
 mod radio_button;
 mod radio_menu_item;

gtk/src/print_operation.rs

@@ -0,0 +1,21 @@
+// Take a look at the license at the top of the repository in the LICENSE file.
+
+use crate::PrintOperation;
+use glib::translate::*;
+use std::ptr;
+
+impl PrintOperation {
+    #[doc(alias = "gtk_print_operation_get_error")]
+    #[doc(alias = "get_error")]
+    pub fn error(&self) -> Option<glib::Error> {
+        unsafe {
+            let mut error = ptr::null_mut();
+            ffi::gtk_print_operation_get_error(self.to_glib_none().0, &mut error);
+            if error.is_null() {
+                None
+            } else {
+                Some(from_glib_full(error))
+            }
+        }
+    }
+}