[gnome-boxes/improve-storage-management-ux: 4/7] preferences, memory-row: Add label for when spin_button can't be changed

[Felipe Borges <felipeborges src gnome org>]

commit 43a89939b6ef97919da56a4b53eeb0159b025c6d
Author: Felipe Borges <felipeborges gnome org>
Date:   Mon Dec 13 15:59:43 2021 +0100

    preferences, memory-row: Add label for when spin_button can't be changed
    
    There are scenarios when the spin_button of a memory row cannot be
    used. For example, during the "import" of a disk or when running
    a disk that wasn't created by Boxes.

 data/ui/preferences/memory-row.ui | 22 +++++++++++++++++-----
 src/preferences/memory-row.vala   |  4 ++++
 2 files changed, 21 insertions(+), 5 deletions(-)
---
diff --git a/data/ui/preferences/memory-row.ui b/data/ui/preferences/memory-row.ui
index c6f3265c..29ff20b3 100644
--- a/data/ui/preferences/memory-row.ui
+++ b/data/ui/preferences/memory-row.ui
@@ -5,12 +5,24 @@
     <property name="activatable">False</property>
 
     <child>
-      <object class="GtkSpinButton" id="spin_button">
+      <object class="GtkStack" id="stack">
         <property name="visible">True</property>
-        <property name="can_focus">True</property>
-        <property name="valign">center</property>
-        <signal name="input" handler="on_spin_button_input"/>
-        <signal name="output" handler="on_spin_button_output"/>
+
+        <child>
+          <object class="GtkSpinButton" id="spin_button">
+            <property name="visible">True</property>
+            <property name="can_focus">True</property>
+            <property name="valign">center</property>
+            <signal name="input" handler="on_spin_button_input"/>
+            <signal name="output" handler="on_spin_button_output"/>
+          </object>
+        </child>
+
+        <child>
+          <object class="GtkLabel" id="used_label">
+            <property name="visible">True</property>
+          </object>
+        </child>
       </object>
     </child>
   </template>
diff --git a/src/preferences/memory-row.vala b/src/preferences/memory-row.vala
index 7ccbef6b..de3872e5 100644
--- a/src/preferences/memory-row.vala
+++ b/src/preferences/memory-row.vala
@@ -2,6 +2,10 @@
 
 [GtkTemplate (ui = "/org/gnome/Boxes/ui/preferences/memory-row.ui")]
 private class Boxes.MemoryRow : Hdy.ActionRow {
+    [GtkChild]
+    protected unowned Gtk.Stack stack;
+    [GtkChild]
+    protected unowned Gtk.Label used_label;
     [GtkChild]
     public unowned Gtk.SpinButton spin_button;