[gnome-mahjongg/arnaudb/wip/gtk4: 15/23] Adapt to Button API.

[Arnaud B. <arnaudb src gnome org>]

commit fef1a032a786ae368fd661472316b0e45d150274
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Fri Mar 27 19:41:25 2020 +0100

    Adapt to Button API.

 src/gnome-mahjongg.vala | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)
---
diff --git a/src/gnome-mahjongg.vala b/src/gnome-mahjongg.vala
index 1bdd0fd..7f1a448 100644
--- a/src/gnome-mahjongg.vala
+++ b/src/gnome-mahjongg.vala
@@ -112,24 +112,24 @@ public class Mahjongg : Gtk.Application
         var hbox = new Gtk.Box (Gtk.Orientation.HORIZONTAL, 0);
         hbox.get_style_context ().add_class ("linked");
 
-        var undo_button = new Gtk.Button.from_icon_name ("edit-undo-symbolic", Gtk.IconSize.BUTTON);
+        var undo_button = new Gtk.Button.from_icon_name ("edit-undo-symbolic");
         undo_button.valign = Gtk.Align.CENTER;
         undo_button.action_name = "app.undo";
         undo_button.set_tooltip_text (_("Undo your last move"));
         hbox.add (undo_button);
 
-        var redo_button = new Gtk.Button.from_icon_name ("edit-redo-symbolic", Gtk.IconSize.BUTTON);
+        var redo_button = new Gtk.Button.from_icon_name ("edit-redo-symbolic");
         redo_button.valign = Gtk.Align.CENTER;
         redo_button.action_name = "app.redo";
         redo_button.set_tooltip_text (_("Redo your last move"));
         hbox.add (redo_button);
 
-        var hint_button = new Gtk.Button.from_icon_name ("dialog-question-symbolic", Gtk.IconSize.BUTTON);
+        var hint_button = new Gtk.Button.from_icon_name ("dialog-question-symbolic");
         hint_button.valign = Gtk.Align.CENTER;
         hint_button.action_name = "app.hint";
         hint_button.set_tooltip_text (_("Receive a hint for your next move"));
 
-        pause_button = new Gtk.Button.from_icon_name ("media-playback-pause-symbolic", Gtk.IconSize.BUTTON);
+        pause_button = new Gtk.Button.from_icon_name ("media-playback-pause-symbolic");
         pause_button.valign = Gtk.Align.CENTER;
         pause_button.action_name = "app.pause";
         pause_button.set_tooltip_text (_("Pause the game"));
@@ -627,15 +627,14 @@ public class Mahjongg : Gtk.Application
         game_view.game.set_hint (null, null);
         game_view.game.selected_tile = null;
 
-        var pause_image = (Gtk.Image) pause_button.image;
         if (game_view.game.paused)
         {
-            pause_image.icon_name = "media-playback-start-symbolic";
+            pause_button.icon_name = "media-playback-start-symbolic";
             pause_button.set_tooltip_text (_("Unpause the game"));
         }
         else
         {
-            pause_image.icon_name = "media-playback-pause-symbolic";
+            pause_button.icon_name = "media-playback-pause-symbolic";
             pause_button.set_tooltip_text (_("Pause the game"));
         }
 
@@ -713,8 +712,7 @@ public class Mahjongg : Gtk.Application
         tick_cb ();
 
         /* Reset the pause button in case it was set to resume */
-        var pause_image = (Gtk.Image) pause_button.image;
-        pause_image.icon_name = "media-playback-pause-symbolic";
+        pause_button.icon_name = "media-playback-pause-symbolic";
     }
 
     private void tick_cb ()