[gnome-mines/arnaudb/wip/gtk4: 30/36] Adapt to Widget CSS API.

[Arnaud B. <arnaudb src gnome org>]

commit 4229cdf164e2d02affd64f3a5457ded3f3f16cd9
Author: Arnaud Bonatti <arnaud bonatti gmail com>
Date:   Thu Apr 16 13:01:49 2020 +0200

    Adapt to Widget CSS API.

 src/minefield-view.vala        | 46 +++++++++++++++++++++---------------------
 src/theme-selector-dialog.vala |  2 +-
 src/tile.vala                  | 12 +----------
 3 files changed, 25 insertions(+), 35 deletions(-)
---
diff --git a/src/minefield-view.vala b/src/minefield-view.vala
index 0804f60..947508a 100644
--- a/src/minefield-view.vala
+++ b/src/minefield-view.vala
@@ -158,7 +158,7 @@ public class MinefieldView : Gtk.Grid
         can_focus = true;
         hexpand = true;
         vexpand = true;
-        get_style_context ().add_class ("minefield");
+        add_css_class ("minefield");
 
         selected = new Position ();
         selected.set_x.connect ((x) => { return x; });
@@ -181,8 +181,8 @@ public class MinefieldView : Gtk.Grid
                 SignalHandler.disconnect_by_func (_minefield, null, this);
             }
             _minefield = value;
-            get_style_context ().remove_class ("explodedField");
-            get_style_context ().remove_class ("completedField");
+            remove_css_class ("explodedField");
+            remove_css_class ("completedField");
             mines = new Tile[_minefield.width, _minefield.height];
             forall ((child) => { remove (child); });
             for (int i = 0; i < _minefield.width; i++)
@@ -248,7 +248,7 @@ public class MinefieldView : Gtk.Grid
         }
 
         keyboard_cursor.is_set = false;
-        mines[keyboard_cursor.x,keyboard_cursor.y].remove_class ("cursor");
+        mines[keyboard_cursor.x,keyboard_cursor.y].remove_css_class ("cursor");
         keyboard_cursor.position = {selected.x, selected.y};
     }
 
@@ -293,7 +293,7 @@ public class MinefieldView : Gtk.Grid
 
     private void explode_cb (Minefield minefield)
     {
-        get_style_context  ().add_class ("explodedField");
+        add_css_class ("explodedField");
         /* Show the mines that we missed or the flags that were wrong */
         for (var x = 0; x < minefield.width; x++)
             for (var y = 0; y < minefield.height; y++)
@@ -305,7 +305,7 @@ public class MinefieldView : Gtk.Grid
 
     private void complete_cb (Minefield minefield)
     {
-        get_style_context  ().add_class ("completedField");
+        add_css_class ("completedField");
     }
 
     public override void measure (Gtk.Orientation orientation, int for_size, out int minimum, out int 
natural, out int minimum_baseline, out int natural_baseline)
@@ -353,17 +353,17 @@ public class MinefieldView : Gtk.Grid
             /* Draw explosion if have uncovered a mine */
             if (minefield.has_mine (x, y))
             {
-                mines[x,y].add_class ("exploded");
+                mines[x,y].add_css_class ("exploded");
             }
             /* Indicate the number of mines around this location */
             else
             {
                 var n = minefield.get_n_adjacent_mines (x, y);
-                mines[x,y].remove_class ("maybe");
-                mines[x,y].remove_class ("flag");
-                mines[x,y].add_class ("count");
+                mines[x,y].remove_css_class ("maybe");
+                mines[x,y].remove_css_class ("flag");
+                mines[x,y].add_css_class ("count");
                 if (n > 0)
-                    mines[x,y].add_class (@"surrounded-by-$n-mines");
+                    mines[x,y].add_css_class (@"surrounded-by-$n-mines");
             }
         }
         else
@@ -374,16 +374,16 @@ public class MinefieldView : Gtk.Grid
             /* Draw flags on uncleared locations */
             if (minefield.get_flag (x, y) == FlagType.FLAG)
             {
-                mines[x,y].add_class ("flag");
+                mines[x,y].add_css_class ("flag");
                 /* Cross out incorrect flags */
                 if (minefield.exploded && !minefield.has_mine (x, y))
                 {
-                    mines[x,y].add_class ("incorrect");
+                    mines[x,y].add_css_class ("incorrect");
                 }
             }
             else if (minefield.exploded && minefield.has_mine (x, y))
             {
-                mines[x,y].add_class ("mine");
+                mines[x,y].add_css_class ("mine");
             }
 
         }
@@ -403,26 +403,26 @@ public class MinefieldView : Gtk.Grid
             if (minefield.n_flags >= minefield.n_mines && use_question_marks)
             {
                 minefield.set_flag (x, y, FlagType.MAYBE);
-                mines[x,y].add_class ("maybe");
+                mines[x,y].add_css_class ("maybe");
             }
             else
             {
                 minefield.set_flag (x, y, FlagType.FLAG);
-                mines[x,y].add_class ("flag");
+                mines[x,y].add_css_class ("flag");
             }
             break;
 
         case FlagType.MAYBE:
-            mines[x,y].remove_class ("maybe");
+            mines[x,y].remove_css_class ("maybe");
             minefield.set_flag (x, y, FlagType.NONE);
             break;
 
         case FlagType.FLAG:
-            mines[x,y].remove_class ("flag");
+            mines[x,y].remove_css_class ("flag");
             if (use_question_marks)
             {
                 minefield.set_flag (x, y, FlagType.MAYBE);
-                mines[x,y].add_class ("maybe");
+                mines[x,y].add_css_class ("maybe");
             }
             else
             {
@@ -452,7 +452,7 @@ public class MinefieldView : Gtk.Grid
 
         var x = keyboard_cursor.x;
         var y = keyboard_cursor.y;
-        mines[keyboard_cursor.x,keyboard_cursor.y].remove_class ("cursor");
+        mines[keyboard_cursor.x,keyboard_cursor.y].remove_css_class ("cursor");
 
         switch (keyval)
         {
@@ -507,20 +507,20 @@ public class MinefieldView : Gtk.Grid
 
         if (x == keyboard_cursor.x && y == keyboard_cursor.y)
         {
-            mines[keyboard_cursor.x,keyboard_cursor.y].add_class ("cursor");
+            mines[keyboard_cursor.x,keyboard_cursor.y].add_css_class ("cursor");
             return true;
         }
 
         if (!keyboard_cursor.is_set)
         {
             keyboard_cursor.is_set = true;
-            mines[keyboard_cursor.x,keyboard_cursor.y].add_class ("cursor");
+            mines[keyboard_cursor.x,keyboard_cursor.y].add_css_class ("cursor");
             return true;
         }
 
         keyboard_cursor.position = { (int) (x % _minefield.width), (int) (y % _minefield.height)};
 
-        mines[keyboard_cursor.x,keyboard_cursor.y].add_class ("cursor");
+        mines[keyboard_cursor.x,keyboard_cursor.y].add_css_class ("cursor");
         if (selected.is_set)
             selected.position = {keyboard_cursor.x, keyboard_cursor.y};
 
diff --git a/src/theme-selector-dialog.vala b/src/theme-selector-dialog.vala
index 55a336f..5c6b703 100644
--- a/src/theme-selector-dialog.vala
+++ b/src/theme-selector-dialog.vala
@@ -123,7 +123,7 @@ public class ThemeSelectorDialog : Gtk.Dialog
 
         buttons_holder.add (previous);
         buttons_holder.add (next);
-        buttons_holder.get_style_context ().add_class ("linked");
+        buttons_holder.add_css_class ("linked");
         headerbar.pack_start (buttons_holder);
 
         var themes = list_themes ();
diff --git a/src/tile.vala b/src/tile.vala
index adca644..690e42c 100644
--- a/src/tile.vala
+++ b/src/tile.vala
@@ -19,7 +19,7 @@ public class Tile : Gtk.Button
     construct
     {
         can_focus = false;
-        add_class ("tile");
+        add_css_class ("tile");
 
         _gesture = new Gtk.GestureLongPress ();
         _gesture.pressed.connect((x, y) =>
@@ -49,14 +49,4 @@ public class Tile : Gtk.Button
         });
         add_controller (_click_controller);
     }
-
-    public void add_class (string style_class)
-    {
-        get_style_context ().add_class (style_class);
-    }
-
-    public void remove_class (string style_class)
-    {
-        get_style_context ().remove_class (style_class);
-    }
 }