[gnome-taquin/arnaudb/wip/gtk4: 93/108] GtkOverlay is not subclassable anymore.

[Arnaud B. <arnaudb src gnome org>]

commit 9830eb39aae3fdc6527f9eba366a5318ee2336a6
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Sat Apr 18 16:04:52 2020 +0200

    GtkOverlay is not subclassable anymore.

 data/ui/overlayed-list.ui | 78 +++++++++++++++++++++++++----------------------
 src/overlayed-list.vala   |  5 ++-
 2 files changed, 45 insertions(+), 38 deletions(-)
---
diff --git a/data/ui/overlayed-list.ui b/data/ui/overlayed-list.ui
index 5dd7cdb..239cf2a 100644
--- a/data/ui/overlayed-list.ui
+++ b/data/ui/overlayed-list.ui
@@ -17,52 +17,56 @@
 -->
 <interface>
   <requires lib="gtk+" version="3.99"/>
-  <template class="OverlayedList" parent="GtkOverlay">
-    <property name="expand">True</property>
-    <style>
-      <class name="overlayed-list"/>
-      <class name="vertical"/>
-    </style>
+  <template class="OverlayedList" parent="GtkWidget">
     <child>
-      <object class="GtkScrolledWindow" id="scrolled">
+      <object class="GtkOverlay">
         <property name="expand">True</property>
-        <property name="hscrollbar-policy">never</property>
-        <property name="max-content-height">300</property>
-        <property name="propagate-natural-width">True</property>
-        <property name="propagate-natural-height">True</property>
-        <child>
-          <object class="GtkListBox" id="main_list_box">
-            <signal name="selected-rows-changed" handler="on_selection_changed"/>
-          </object>
-        </child>
-      </object>
-    </child>
-    <child type="overlay">
-      <object class="GtkBox" id="edit_mode_box">
-        <property name="visible">False</property>
-        <property name="halign">center</property>
-        <property name="valign">end</property>
-        <property name="width-request">200</property>
         <style>
-          <class name="linked"/>
-          <class name="linked-circular"/>
+          <class name="overlayed-list"/>
+          <class name="vertical"/>
         </style>
         <child>
-          <object class="GtkToggleButton" id="leave_edit_mode_button">
-            <property name="hexpand">True</property>
-            <property name="focus-on-click">False</property>
-            <style>
-              <class name="left-on-ltr"/>
-            </style>
+          <object class="GtkScrolledWindow" id="scrolled">
+            <property name="expand">True</property>
+            <property name="hscrollbar-policy">never</property>
+            <property name="max-content-height">300</property>
+            <property name="propagate-natural-width">True</property>
+            <property name="propagate-natural-height">True</property>
+            <child>
+              <object class="GtkListBox" id="main_list_box">
+                <signal name="selected-rows-changed" handler="on_selection_changed"/>
+              </object>
+            </child>
           </object>
         </child>
-        <child>
-          <object class="GtkToggleButton" id="enter_edit_mode_button">
-            <property name="hexpand">True</property>
-            <property name="focus-on-click">False</property>
+        <child type="overlay">
+          <object class="GtkBox" id="edit_mode_box">
+            <property name="visible">False</property>
+            <property name="halign">center</property>
+            <property name="valign">end</property>
+            <property name="width-request">200</property>
             <style>
-              <class name="right-on-ltr"/>
+              <class name="linked"/>
+              <class name="linked-circular"/>
             </style>
+            <child>
+              <object class="GtkToggleButton" id="leave_edit_mode_button">
+                <property name="hexpand">True</property>
+                <property name="focus-on-click">False</property>
+                <style>
+                  <class name="left-on-ltr"/>
+                </style>
+              </object>
+            </child>
+            <child>
+              <object class="GtkToggleButton" id="enter_edit_mode_button">
+                <property name="hexpand">True</property>
+                <property name="focus-on-click">False</property>
+                <style>
+                  <class name="right-on-ltr"/>
+                </style>
+              </object>
+            </child>
           </object>
         </child>
       </object>
diff --git a/src/overlayed-list.vala b/src/overlayed-list.vala
index ad834c5..31f7afd 100644
--- a/src/overlayed-list.vala
+++ b/src/overlayed-list.vala
@@ -18,7 +18,7 @@
 using Gtk;
 
 [GtkTemplate (ui = "/org/gnome/Taquin/ui/overlayed-list.ui")]
-private abstract class OverlayedList : Overlay, AdaptativeWidget
+private abstract class OverlayedList : Widget, AdaptativeWidget
 {
     [GtkChild] protected ListBox        main_list_box;
                private   StyleContext   main_list_box_context;
@@ -33,6 +33,9 @@ private abstract class OverlayedList : Overlay, AdaptativeWidget
 
     construct
     {
+        BinLayout layout = new BinLayout ();
+        set_layout_manager (layout);
+
         main_list_box_context = main_list_box.get_style_context ();
         main_context = get_style_context ();
         connect_handlers ();