[gnome-sudoku] Make Back button in new game screen insensitive while generating puzzle

[Parin Porecha <parinporecha src gnome org>]

commit b1e67c9938f8805bb20aba88ec03f3f85897fd02
Author: Parin Porecha <parinporecha gmail com>
Date:   Mon Aug 18 20:04:57 2014 +0200

    Make Back button in new game screen insensitive while generating puzzle

 src/gnome-sudoku.vala |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/src/gnome-sudoku.vala b/src/gnome-sudoku.vala
index c27542c..7d1880c 100644
--- a/src/gnome-sudoku.vala
+++ b/src/gnome-sudoku.vala
@@ -297,9 +297,12 @@ public class Sudoku : Gtk.Application
         // Following line converts those ints to their DifficultyCategory
         var selected_difficulty = (DifficultyCategory) difficulty.get_int32 ();
 
+        back_button.sensitive = false;
+
         SudokuGenerator.generate_boards_async.begin (1, selected_difficulty, (obj, res) => {
             try {
                 var gen_boards = SudokuGenerator.generate_boards_async.end (res);
+                back_button.sensitive = true;
                 start_game (gen_boards[0]);
             } catch (ThreadError e) {
                 error ("Thread error: %s", e.message);