[gnome-sudoku/arnaudb/wip/gtk4: 39/47] Adapt to Container disparition.

[Arnaud B. <arnaudb src gnome org>]

commit 77d63b2d292e87870596e241951bcb869a28f979
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Wed Aug 5 19:07:29 2020 +0200

    Adapt to Container disparition.

 src/number-picker.vala |  4 ++--
 src/print-dialog.vala  |  2 +-
 src/sudoku-view.vala   | 14 +++++++++-----
 3 files changed, 12 insertions(+), 8 deletions(-)
---
diff --git a/src/number-picker.vala b/src/number-picker.vala
index e98c77b..07bc108 100644
--- a/src/number-picker.vala
+++ b/src/number-picker.vala
@@ -53,7 +53,7 @@ private class NumberPicker : Grid
                 label.margin_end    = earmark ? 16 : 8;
                 label.margin_top    = earmark ?  0 : 4;
                 label.margin_bottom = earmark ?  8 : 4;
-                button.add (label);
+                button.set_child (label);
 
                 if (!earmark)
                     button.clicked.connect (() => {
@@ -81,7 +81,7 @@ private class NumberPicker : Grid
 
             var label = new Label ("<big>%s</big>".printf (_("Clear")));
             label.use_markup = true;
-            clear_button.add (label);
+            clear_button.set_child (label);
 
             clear_button.clicked.connect (() => {
                 number_picked (0);
diff --git a/src/print-dialog.vala b/src/print-dialog.vala
index 2c4a05d..509c6b6 100644
--- a/src/print-dialog.vala
+++ b/src/print-dialog.vala
@@ -60,7 +60,7 @@ public class PrintDialog : Dialog
 
         spinner = new Spinner ();
         revealer = new Revealer ();
-        revealer.add (spinner);
+        revealer.set_child (spinner);
         revealer.valign = Align.CENTER;
         ((HeaderBar) get_header_bar ()).pack_end (revealer);
 
diff --git a/src/sudoku-view.vala b/src/sudoku-view.vala
index e49f817..c8761af 100644
--- a/src/sudoku-view.vala
+++ b/src/sudoku-view.vala
@@ -202,7 +202,7 @@ private class SudokuCellView : Widget
         number_picker.set_clear_button_visibility (value != 0);
 
         popover = new Popover ();
-        popover.add (number_picker);
+        popover.set_child (number_picker);
         popover.set_autohide (false);
         popover.position = PositionType.BOTTOM;
         popover.set_parent (this);
@@ -226,7 +226,7 @@ private class SudokuCellView : Widget
         create_earmark_picker ();
 
         earmark_popover = new Popover ();
-        earmark_popover.add (earmark_picker);
+        earmark_popover.set_child (earmark_picker);
         earmark_popover.set_autohide (false);
         earmark_popover.position = PositionType.BOTTOM;
         earmark_popover.set_parent (this);
@@ -538,14 +538,18 @@ public class SudokuView : Widget
         frame.insert_after (this, /* insert first */ null);
 
         overlay = new Overlay ();
-        frame.add (overlay);
+        frame.set_child (overlay);
 
         drawing = new DrawingArea ();
         drawing.visible = false;
         drawing.set_draw_func (draw_board);
 
         if (grid != null)
-            overlay.remove (grid);
+        {
+            grid.unparent ();
+            grid.destroy ();
+            overlay.set_child (null);
+        }
 
         this.game = game;
         this.game.paused_changed.connect(() => {
@@ -629,7 +633,7 @@ public class SudokuView : Widget
         }
 
         overlay.add_overlay (drawing);
-        overlay.add (grid);
+        overlay.set_child (grid);
     }
 
     private void update_highlights ()