[four-in-a-row/KaKnife/four-in-a-row-vala: 55/65] made GameBoardView not a singleton

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 35d3187254482ece304c5557ada3b48957ad8209
Author: Jacob Humphrey <jacob ryan humphrey gmail com>
Date:   Sat Dec 15 05:20:11 2018 -0600

    made GameBoardView not a singleton

 src/four-in-a-row.vala   | 31 ++++++++++++++++---------------
 src/game-board-view.vala | 15 +++++----------
 src/main.vala            |  3 ---
 src/prefs.vala           |  7 ++-----
 4 files changed, 23 insertions(+), 33 deletions(-)
---
diff --git a/src/four-in-a-row.vala b/src/four-in-a-row.vala
index a2994d0..e905458 100644
--- a/src/four-in-a-row.vala
+++ b/src/four-in-a-row.vala
@@ -32,6 +32,7 @@ class FourInARow : Gtk.Application {
     public PlayerID who_starts;
     PrefsBox? prefsbox = null;
     Scorebox scorebox;
+    GameBoardView game_board_view;
     /**
      * socre:
      *
@@ -84,7 +85,7 @@ class FourInARow : Gtk.Application {
 
         clear_board();
         set_status_message(null);
-        GameBoardView.instance.draw_all();
+        game_board_view.draw_all();
 
         move_cursor(column);
         gameover = false;
@@ -177,7 +178,7 @@ class FourInARow : Gtk.Application {
         do {
             done = (r1 == r2 && c1 == c2);
             Board.instance.set(r1, c1, (Tile) tile);
-            GameBoardView.instance.draw_tile(r1, c1);
+            game_board_view.draw_tile(r1, c1);
             if (r1 != r2)
                 r1 += d_row;
             if (c1 != c2)
@@ -205,8 +206,8 @@ class FourInARow : Gtk.Application {
     protected override void activate() {
         if (!window.is_visible()) {
             window.show_all();
-            GameBoardView.instance.refresh_pixmaps();
-            GameBoardView.instance.draw_all();
+            game_board_view.refresh_pixmaps();
+            game_board_view.draw_all();
             scorebox.update(score);       /* update visible player descriptions */
             prompt_player();
             game_reset();
@@ -368,7 +369,6 @@ class FourInARow : Gtk.Application {
         score[PlayerID.NOBODY] = 0;
 
         who_starts = PlayerID.PLAYER2;     /* This gets reversed immediately. */
-
         clear_board();
     }
 
@@ -407,7 +407,7 @@ class FourInARow : Gtk.Application {
         Tile tile = player == PlayerID.PLAYER1 ? Tile.PLAYER1 : Tile.PLAYER2;
 
         Board.instance.set(r, c, tile);
-        GameBoardView.instance.draw_tile(r, c);
+        game_board_view.draw_tile(r, c);
 
         column = column_moveto = c;
         row = row_dropto = r;
@@ -417,21 +417,21 @@ class FourInARow : Gtk.Application {
         Tile tile = player == PLAYER1 ? Tile.PLAYER1 : Tile.PLAYER2;
 
         Board.instance.set(row, column, Tile.CLEAR);
-        GameBoardView.instance.draw_tile(row, column);
+        game_board_view.draw_tile(row, column);
 
         row++;
         Board.instance.set(row, column, tile);
-        GameBoardView.instance.draw_tile(row, column);
+        game_board_view.draw_tile(row, column);
     }
 
     public void move(int c) {
         Board.instance.set(0, column, Tile.CLEAR);
-        GameBoardView.instance.draw_tile(0, column);
+        game_board_view.draw_tile(0, column);
 
         column = c;
         Board.instance.set(0, c, player == PlayerID.PLAYER1 ? Tile.PLAYER1 : Tile.PLAYER2);
 
-        GameBoardView.instance.draw_tile(0, c);
+        game_board_view.draw_tile(0, c);
     }
 
     public void move_cursor(int c) {
@@ -619,7 +619,7 @@ class FourInARow : Gtk.Application {
         move_cursor(c);
 
         Board.instance.set(r, c, Tile.CLEAR);
-        GameBoardView.instance.draw_tile(r, c);
+        game_board_view.draw_tile(r, c);
 
         if (Prefs.instance.get_n_human_players() == 1 && !is_player_human()) {
             if (moves > 0) {
@@ -631,7 +631,7 @@ class FourInARow : Gtk.Application {
                 swap_player();
                 move_cursor(c);
                 Board.instance.set(r, c, Tile.CLEAR);
-                GameBoardView.instance.draw_tile(r, c);
+                game_board_view.draw_tile(r, c);
             }
         }
     }
@@ -704,6 +704,7 @@ class FourInARow : Gtk.Application {
 
     protected override void startup() {
         base.startup();
+
         scorebox = new Scorebox(this);
         Gtk.AspectFrame frame;
         GLib.Menu app_menu, section;
@@ -723,7 +724,7 @@ class FourInARow : Gtk.Application {
         Gtk.StyleContext.add_provider_for_screen(Gdk.Screen.get_default(),
                                                  css_provider,
                                                  Gtk.STYLE_PROVIDER_PRIORITY_APPLICATION);
-
+        game_board_view = new GameBoardView();
         builder = new Gtk.Builder.from_file(Config.DATA_DIRECTORY + "/four-in-a-row.ui");
 
         window = builder.get_object("fiar-window") as Gtk.ApplicationWindow;
@@ -749,8 +750,8 @@ class FourInARow : Gtk.Application {
 
         frame = builder.get_object("frame") as Gtk.AspectFrame;
 
-        frame.add(GameBoardView.instance);
-        GameBoardView.instance.column_clicked.connect(column_clicked_cb);
+        frame.add(game_board_view);
+        game_board_view.column_clicked.connect(column_clicked_cb);
         window.key_press_event.connect(on_key_press);
 
         hint_action.set_enabled(false);
diff --git a/src/game-board-view.vala b/src/game-board-view.vala
index e6480d5..4b056e2 100644
--- a/src/game-board-view.vala
+++ b/src/game-board-view.vala
@@ -29,17 +29,8 @@ class GameBoardView : Gtk.DrawingArea {
     /* scaled pixbufs */
     Gdk.Pixbuf pb_tileset;
     Gdk.Pixbuf pb_bground;
-    //public Gtk.DrawingArea drawarea;
-
-    static Once<GameBoardView> _instance;
-    public static GameBoardView instance {
-        get {
-            return _instance.once(() => {return new GameBoardView();});
-        }
-    }
 
     public GameBoardView() {
-        Object();
         /* set a min size to avoid pathological behavior of gtk when scaling down */
         set_size_request(350, 350);
         halign = Gtk.Align.FILL;
@@ -48,6 +39,10 @@ class GameBoardView : Gtk.DrawingArea {
         events = Gdk.EventMask.EXPOSURE_MASK |
                           Gdk.EventMask.BUTTON_PRESS_MASK |
                           Gdk.EventMask.BUTTON_RELEASE_MASK;
+        Prefs.instance.notify["theme_id"].connect(() =>{
+            change_theme();
+        });
+        load_pixmaps();
     }
 
     public int get_column(int xpos) {
@@ -95,7 +90,7 @@ class GameBoardView : Gtk.DrawingArea {
             return false;
 
         refresh_pixmaps();
-        instance.draw_all();
+        draw_all();
         return true;
     }
 
diff --git a/src/main.vala b/src/main.vala
index ce796ce..d110db2 100644
--- a/src/main.vala
+++ b/src/main.vala
@@ -98,9 +98,6 @@ public int main(string[] argv) {
 
     application.game_init();
 
-    if (!GameBoardView.instance.load_pixmaps())
-        return 1;
-
     var app_retval = application.run(argv);
 
     return app_retval;
diff --git a/src/prefs.vala b/src/prefs.vala
index c390324..8706dda 100644
--- a/src/prefs.vala
+++ b/src/prefs.vala
@@ -59,9 +59,6 @@ class Prefs : Object {
         level[PlayerID.PLAYER1] = sane_player_level(level[PlayerID.PLAYER1]);
         level[PlayerID.PLAYER2] = sane_player_level(level[PlayerID.PLAYER2]);
         theme_id = sane_theme_id(theme_id);
-        notify["theme_id"].connect(() =>{
-            GameBoardView.instance.change_theme();
-        });
     }
 
     static int sane_theme_id(int val) {
@@ -84,8 +81,8 @@ class Prefs : Object {
             int val = sane_theme_id(settings.get_int("theme-id"));
             if (val != theme_id) {
                  theme_id = val;
-                if (!GameBoardView.instance.change_theme())
-                    return;
+                //if (!GameBoardView.instance.change_theme())
+                    //return;
                 theme_changed(theme_id);
             }
         }