[iagno/arnaudb/wip/gtk4: 13/54] Adapt to DrawingArea API.

[Arnaud B. <arnaudb src gnome org>]

commit e2eaed234e08535a2dddffde573a32a471dba772
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Fri Feb 14 07:02:33 2020 +0100

    Adapt to DrawingArea API.

 src/history-button.vala | 8 ++++----
 src/reversi-view.vala   | 7 +++----
 2 files changed, 7 insertions(+), 8 deletions(-)
---
diff --git a/src/history-button.vala b/src/history-button.vala
index f71dd87..5b45703 100644
--- a/src/history-button.vala
+++ b/src/history-button.vala
@@ -36,7 +36,7 @@ private class HistoryButton : MenuButton, AdaptativeWidget
     construct
     {
         drawing.size_allocate.connect (on_drawing_size_allocate);
-        drawing.draw.connect (update_drawing);
+        drawing.set_draw_func (update_drawing);
         theme_manager.theme_changed.connect (() => {
                 if (!drawing_configured)
                     return;
@@ -112,17 +112,17 @@ private class HistoryButton : MenuButton, AdaptativeWidget
         tiles_pattern = new Cairo.Pattern.for_surface (surface);
     }
 
-    private bool update_drawing (Cairo.Context cr)
+    private void update_drawing (Gtk.DrawingArea _drawing, Cairo.Context cr, int width, int height)
     {
         if (!drawing_configured)
-            return false;
+            return;
 
         if (tiles_pattern == null)
             init_pattern (cr);
 
         draw_arrow (cr);
         draw_piece (cr);
-        return true;
+        return;
     }
 
     private const double arrow_margin_top = 3.0;
diff --git a/src/reversi-view.vala b/src/reversi-view.vala
index 4c9f2d1..7e2b7fc 100644
--- a/src/reversi-view.vala
+++ b/src/reversi-view.vala
@@ -170,6 +170,7 @@ private class ReversiView : Gtk.DrawingArea
 
         init_mouse ();
         init_keyboard ();
+        set_draw_func (draw);
         size_allocate.connect (on_size_allocate);
 
         theme_manager.theme_changed.connect (() => {
@@ -261,10 +262,10 @@ private class ReversiView : Gtk.DrawingArea
         }
     }
 
-    protected override bool draw (Cairo.Context cr)
+    private void draw (Gtk.DrawingArea _this, Cairo.Context cr, int width, int height)
     {
         if (!game_is_set)
-            return false;
+            return;
 
         if (board_pattern == null || tiles_pattern == null || render_size != tile_size)
             init_patterns (cr);
@@ -291,8 +292,6 @@ private class ReversiView : Gtk.DrawingArea
             draw_playables (cr);
         else
             draw_overture_playables (cr);
-
-        return false;
     }
 
     private inline void init_patterns (Cairo.Context cr)