[gnome-tetravex] Disable pause button before game has started

[Michael Catanzaro <mcatanzaro src gnome org>]

commit c197193a3a4ae1a149ed0d03cbdb84f0f7ce4411
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Sat Feb 15 12:18:09 2014 -0600

    Disable pause button before game has started
    
    https://bugzilla.gnome.org/show_bug.cgi?id=724221

 src/gnome-tetravex.vala |   11 ++++++-----
 src/puzzle-view.vala    |    4 ++++
 2 files changed, 10 insertions(+), 5 deletions(-)
---
diff --git a/src/gnome-tetravex.vala b/src/gnome-tetravex.vala
index 5adce94..8d394d4 100644
--- a/src/gnome-tetravex.vala
+++ b/src/gnome-tetravex.vala
@@ -208,6 +208,11 @@ public class Tetravex : Gtk.Application
 
     private void new_game ()
     {
+        var pause = lookup_action ("pause") as SimpleAction;
+        pause.change_state (false);
+        pause.set_enabled (false);
+        new_game_solve_stack.set_visible_child_name ("solve");
+
         if (puzzle != null)
             SignalHandler.disconnect_by_func (puzzle, null, this);
 
@@ -215,14 +220,10 @@ public class Tetravex : Gtk.Application
         puzzle = new Puzzle (size);
         puzzle.tick.connect (tick_cb);
         puzzle.solved.connect (solved_cb);
+        puzzle.tile_moved.connect (() => pause.set_enabled (true));
         view.puzzle = puzzle;
         tick_cb ();
 
-        var pause = lookup_action ("pause") as SimpleAction;
-        pause.change_state (false);
-        pause.set_enabled (true);
-        new_game_solve_stack.set_visible_child_name ("solve");
-
         update_button_states ();
     }
 
diff --git a/src/puzzle-view.vala b/src/puzzle-view.vala
index 96ab5a4..f3ae683 100644
--- a/src/puzzle-view.vala
+++ b/src/puzzle-view.vala
@@ -92,6 +92,9 @@ public class PuzzleView : Gtk.DrawingArea
     private Timer animation_timer;
     private uint animation_timeout = 0;
 
+    /* Emitted when a tile is moved */
+    public signal void tile_moved ();
+
     public PuzzleView ()
     {
         set_events (Gdk.EventMask.EXPOSURE_MASK | Gdk.EventMask.BUTTON_PRESS_MASK | 
Gdk.EventMask.POINTER_MOTION_MASK | Gdk.EventMask.BUTTON_RELEASE_MASK);
@@ -229,6 +232,7 @@ public class PuzzleView : Gtk.DrawingArea
     private void tile_moved_cb (Puzzle puzzle, Tile tile, uint x, uint y)
     {
         move_tile_to_location (tiles.lookup (tile), x, y, 0.2);
+        tile_moved ();
     }
     
     public override bool configure_event (Gdk.EventConfigure event)