[nautilus/wip/toolbar-start-end: 6/6] toolbar: Use GtkRevealer for sidebar button

[António Fernandes <antoniof src gnome org>]

commit 2acb93f50b830c71bbfb174e5c178badce0473fc
Author: Christopher Davis <christopherdavis gnome org>
Date:   Fri Jul 29 23:45:07 2022 -0400

    toolbar: Use GtkRevealer for sidebar button
    
    Since we don't need to deal with the automatic spacing from
    GtkHeaderBar, we can take advantage of GtkRevealer to get
    a smooth transition for the button's visibility. This also
    gets rid of a flicker and warning from GTK.

 src/resources/ui/nautilus-toolbar.ui | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)
---
diff --git a/src/resources/ui/nautilus-toolbar.ui b/src/resources/ui/nautilus-toolbar.ui
index b5f150f08..9e4bf64e8 100644
--- a/src/resources/ui/nautilus-toolbar.ui
+++ b/src/resources/ui/nautilus-toolbar.ui
@@ -120,11 +120,16 @@
         <child type="start">
           <object class="GtkBox">
             <child>
-              <object class="GtkToggleButton" id="show_sidebar_button">
-                <property name="visible" bind-source="NautilusToolbar" bind-property="show-sidebar-button" 
bind-flags="bidirectional|sync-create"/>
-                <property name="active" bind-source="NautilusToolbar" bind-property="sidebar-button-active" 
bind-flags="bidirectional|sync-create"/>
-                <property name="tooltip-text" translatable="yes">Show sidebar</property>
-                <property name="icon-name">sidebar-show-symbolic</property>
+              <object class="GtkRevealer">
+                <property name="reveal-child" bind-source="NautilusToolbar" 
bind-property="show-sidebar-button" bind-flags="bidirectional|sync-create"/>
+                <property name="transition-type">slide-right</property>
+                <property name="child">
+                  <object class="GtkToggleButton" id="show_sidebar_button">
+                    <property name="active" bind-source="NautilusToolbar" 
bind-property="sidebar-button-active" bind-flags="bidirectional|sync-create"/>
+                    <property name="tooltip-text" translatable="yes">Show sidebar</property>
+                    <property name="icon-name">sidebar-show-symbolic</property>
+                  </object>
+                </property>
               </object>
             </child>
             <child>