[gnome-control-center] user-account: Use a stack in user-icon to keep the same size

[Felipe Borges <felipeborges src gnome org>]

commit 92e99f677fcfe6b56d9f324a11f4f7fbf999523c
Author: Felipe Borges <felipeborges gnome org>
Date:   Sun Feb 12 14:51:50 2017 +0100

    user-account: Use a stack in user-icon to keep the same size
    
    This fixes the undesired jumps (resizes) while switching between
    "Your Account" and any other account.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=778458

 panels/user-accounts/data/user-accounts-dialog.ui |   13 +------------
 panels/user-accounts/um-user-panel.c              |    8 ++++----
 2 files changed, 5 insertions(+), 16 deletions(-)
---
diff --git a/panels/user-accounts/data/user-accounts-dialog.ui 
b/panels/user-accounts/data/user-accounts-dialog.ui
index 0b88b9c..5507d05 100644
--- a/panels/user-accounts/data/user-accounts-dialog.ui
+++ b/panels/user-accounts/data/user-accounts-dialog.ui
@@ -291,9 +291,8 @@
                   </packing>
                 </child>
                 <child>
-                  <object class="GtkBox">
+                  <object class="GtkStack" id="user-icon">
                     <property name="visible">True</property>
-                    <property name="orientation">GTK_ORIENTATION_HORIZONTAL</property>
                     <property name="halign">GTK_ALIGN_END</property>
                     <child>
                       <object class="UmUserImage" id="user-icon-image">
@@ -307,11 +306,6 @@
                           </object>
                         </child>
                       </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">1</property>
-                      </packing>
                     </child>
                     <child>
                       <object class="GtkToggleButton" id="user-icon-button">
@@ -332,11 +326,6 @@
                           </object>
                         </child>
                       </object>
-                      <packing>
-                        <property name="expand">False</property>
-                        <property name="fill">False</property>
-                        <property name="position">2</property>
-                      </packing>
                     </child>
                   </object>
                   <packing>
diff --git a/panels/user-accounts/um-user-panel.c b/panels/user-accounts/um-user-panel.c
index f1bba72..0a88a45 100644
--- a/panels/user-accounts/um-user-panel.c
+++ b/panels/user-accounts/um-user-panel.c
@@ -1269,8 +1269,8 @@ on_permission_changed (GPermission *permission,
         }
 
         if (is_authorized || self_selected) {
-                gtk_widget_show (get_widget (d, "user-icon-button"));
-                gtk_widget_hide (get_widget (d, "user-icon-image"));
+                gtk_stack_set_visible_child (GTK_STACK (get_widget (d, "user-icon")),
+                                             get_widget (d, "user-icon-button"));
 
                 gtk_widget_set_sensitive (get_widget (d, "account-language-button"), TRUE);
                 remove_unlock_tooltip (get_widget (d, "account-language-button"));
@@ -1285,8 +1285,8 @@ on_permission_changed (GPermission *permission,
                 remove_unlock_tooltip (get_widget (d, "last-login-button"));
         }
         else {
-                gtk_widget_hide (get_widget (d, "user-icon-button"));
-                gtk_widget_show (get_widget (d, "user-icon-image"));
+                gtk_stack_set_visible_child (GTK_STACK (get_widget (d, "user-icon")),
+                                             get_widget (d, "user-icon-image"));
 
                 gtk_widget_set_sensitive (get_widget (d, "account-language-button"), FALSE);
                 add_unlock_tooltip (get_widget (d, "account-language-button"));