[gnome-tetravex/arnaudb/wip/gtk4: 17/32] Adapt to MenuButton API.

[Arnaud B. <arnaudb src gnome org>]

commit 09a50ada1c10a2d6afae70de678b36af73495691
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Fri Feb 21 04:24:11 2020 +0100

    Adapt to MenuButton API.

 src/gnome-tetravex.vala | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)
---
diff --git a/src/gnome-tetravex.vala b/src/gnome-tetravex.vala
index 3fa7075..20cded9 100644
--- a/src/gnome-tetravex.vala
+++ b/src/gnome-tetravex.vala
@@ -328,7 +328,7 @@ private class Tetravex : Gtk.Application
         Builder menu_builder = new Builder.from_resource ("/org/gnome/Tetravex/app-menu.ui");
         MenuModel appmenu = (MenuModel) menu_builder.get_object ("app-menu");
         hamburger_button = new MenuButton ();
-        hamburger_button.set_image (new Image.from_icon_name ("open-menu-symbolic", IconSize.BUTTON));
+        hamburger_button.set_icon_name ("open-menu-symbolic");
         ((Widget) hamburger_button).set_focus_on_click (false);
         hamburger_button.valign = Align.CENTER;
         hamburger_button.show ();
@@ -887,7 +887,7 @@ private class Tetravex : Gtk.Application
 
             if (response != ResponseType.ACCEPT)
                 return;
-            hamburger_button.set_active (false);
+            hamburger_button.popdown ();
         }
         settings.set_int (KEY_GRID_SIZE, size);
         action.set_state (variant);
@@ -1013,7 +1013,10 @@ private class Tetravex : Gtk.Application
 
     private void hamburger_cb ()
     {
-        hamburger_button.active = !hamburger_button.active;
+        if (hamburger_button.popover.visible)   // TODO hackish
+            hamburger_button.popdown ();
+        else
+            hamburger_button.popup ();
     }
 
     private void help_cb ()