[gnome-sudoku] Revert "Remove some dead code"

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 12170a699f32aa5abfa6404e290e3e17e843ed66
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat Dec 26 14:27:42 2020 -0600

    Revert "Remove some dead code"
    
    This reverts commit 9ff45bc4b352b377c3ca1c3b09373947cd7e5552.
    
    It's dead because I removed the code that connects the signal
    handler....

 src/gnome-sudoku.vala | 38 ++++++++++++++++++++++++++++++++++++++
 1 file changed, 38 insertions(+)
---
diff --git a/src/gnome-sudoku.vala b/src/gnome-sudoku.vala
index 8760e4c5..bba966c8 100644
--- a/src/gnome-sudoku.vala
+++ b/src/gnome-sudoku.vala
@@ -498,6 +498,44 @@ public class Sudoku : Gtk.Application
                                );
     }
 
+#if 0
+    // Unused?
+    private bool draw_cb ()
+    {
+        return check_layout_change ();
+    }
+
+    private bool check_layout_change ()
+    {
+        var layout = main_squeezer.visible_child;
+        if (! (layout is AspectFrame))
+            return false;
+        var changed = layout != previous_layout;
+        if (changed)
+            set_layout ((AspectFrame) layout);
+        return changed;
+    }
+
+    private void set_layout (AspectFrame new_layout)
+    {
+        if (new_layout == frame_h)
+        {
+            controls_box.halign = Align.END;
+            controls_box.orientation = Orientation.VERTICAL;
+            game_box.orientation = Orientation.HORIZONTAL;
+        }
+        else
+        {
+            controls_box.halign = Align.CENTER;
+            controls_box.orientation = Orientation.VERTICAL;
+            game_box.orientation = Orientation.VERTICAL;
+        }
+        previous_layout.remove (game_box);
+        new_layout.add (game_box);
+        previous_layout = new_layout;
+    }
+#endif
+
     public static int main (string[] args)
     {
         return new Sudoku ().run (args);