Free the audio device when not in focus

We free the audio device and stop the csound performance
when not visible and start it again when in focus. This
allows to have several instances on one machine.
Commented out to printouts in the svgcard.

1 files changed, 20 insertions, 1 deletions

diff --git a/activity.py b/activity.py
index bb8c101..849f87a 100755
--- a/activity.py
+++ b/activity.py
@@ -95,9 +95,13 @@ class MemorizeActivity(Activity):
         
         self.show_all()
         
+        # connect to the in/out events of the memorize activity
+        self.connect('focus_in_event', self._focus_in)
+        self.connect('focus_out_event', self._focus_out)
+        self.connect('destroy', self._cleanup_cb)
+
         # Get the Presence Service
         self.pservice = presenceservice.get_instance()
-        bus = dbus.Bus()
         name, path = self.pservice.get_preferred_connection()
         self.tp_conn_name = name
         self.tp_conn_path = path
@@ -270,3 +274,18 @@ class MemorizeActivity(Activity):
         else:
             _logger.debug("buddy left - _buddy_left_cb: %s", buddy.props.nick)
             self.game.rem_buddy(buddy)
+
+    def _focus_in(self, event, data=None):
+        if self.game.sound == 1:
+            self.game.cs.start()
+            _logger.debug(" Memorize is visible: start csound server. ")
+        
+    def _focus_out(self, event, data=None):
+        if self.game.sound == 1:
+            self.game.cs.pause()
+            _logger.debug(" Memorize is invisible: pause csound server. ")
+        
+    def _cleanup_cb(self, data=None):
+        if self.game.sound == 1:
+            self.game.cs.quit()        
+            _logger.debug(" Memorize closes: close csound server. ")