[gnome-control-center] network/ce: Provide error tooltip in connection editor

[Robert Ancell <rancell src gnome org>]

commit 0fbe2ada5aec4d6d188038ce514ac57a8a2806cf
Author: Christian Glombek <lorbus fedoraproject org>
Date:   Mon Jun 20 13:46:30 2022 +0200

    network/ce: Provide error tooltip in connection editor
    
    Pass through localized libnm error messages as tooltips
    to the apply button. That way, users can easily identify
    configuration errors.

 panels/network/connection-editor/net-connection-editor.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/panels/network/connection-editor/net-connection-editor.c 
b/panels/network/connection-editor/net-connection-editor.c
index ac02a786e..bf623ead3 100644
--- a/panels/network/connection-editor/net-connection-editor.c
+++ b/panels/network/connection-editor/net-connection-editor.c
@@ -343,6 +343,7 @@ static void
 validate (NetConnectionEditor *self)
 {
         gboolean valid = FALSE;
+        g_autofree gchar *apply_tooltip = NULL;
         gint i;
 
         if (!editor_is_initialized (self))
@@ -356,15 +357,20 @@ validate (NetConnectionEditor *self)
                 if (!ce_page_validate (page, self->connection, &error)) {
                         valid = FALSE;
                         if (error) {
-                                g_debug ("Invalid setting %s: %s", ce_page_get_title (page), error->message);
+                                apply_tooltip = g_strdup_printf (_("Invalid setting %s: %s"), 
ce_page_get_title (page), error->message);
+                                g_debug ("%s", apply_tooltip);
                         } else {
-                                g_debug ("Invalid setting %s", ce_page_get_title (page));
+                                apply_tooltip = g_strdup_printf (_("Invalid setting %s"), ce_page_get_title 
(page));
+                                g_debug ("%s", apply_tooltip);
                         }
                 }
         }
 
         update_sensitivity (self);
 done:
+        if (apply_tooltip != NULL)
+                gtk_widget_set_tooltip_text(GTK_WIDGET (self->apply_button), apply_tooltip);
+
         gtk_widget_set_sensitive (GTK_WIDGET (self->apply_button), valid && self->is_changed);
 }