[pitivi: 3/6] ui/previewer: use signals instead of set_sync_handler to connect to the bus.

[Edward Hervey <edwardrv src gnome org>]

commit 64399370ba824d5a4c53545a70943662958847e6
Author: Alessandro Decina <alessandro d gmail com>
Date:   Fri Sep 10 15:51:40 2010 +0200

    ui/previewer: use signals instead of set_sync_handler to connect to the bus.

 pitivi/ui/previewer.py |   19 ++++++++++---------
 1 files changed, 10 insertions(+), 9 deletions(-)
---
diff --git a/pitivi/ui/previewer.py b/pitivi/ui/previewer.py
index a82988f..97c2e1e 100644
--- a/pitivi/ui/previewer.py
+++ b/pitivi/ui/previewer.py
@@ -386,7 +386,6 @@ class RandomAccessVideoPreviewer(RandomAccessPreviewer):
 
     def _startThumbnail(self, timestamp):
         RandomAccessPreviewer._startThumbnail(self, timestamp)
-        self.log("timestamp : %s", gst.TIME_ARGS(timestamp))
         self.videopipeline.seek(1.0,
             gst.FORMAT_TIME, gst.SEEK_FLAG_FLUSH | gst.SEEK_FLAG_ACCURATE,
             gst.SEEK_TYPE_SET, timestamp,
@@ -427,7 +426,10 @@ class RandomAccessAudioPreviewer(RandomAccessPreviewer):
             conv : self.audioSink,
             self.audioSink : None})
         bus = self.audioPipeline.get_bus()
-        bus.set_sync_handler(self._bus_message)
+        bus.add_signal_watch()
+        bus.connect("message::segment-done", self._busMessageSegmentDoneCb)
+        bus.connect("message::error", self._busMessageErrorCb)
+
         self._audio_cur = None
         self.audioPipeline.set_state(gst.STATE_PAUSED)
 
@@ -438,14 +440,13 @@ class RandomAccessAudioPreviewer(RandomAccessPreviewer):
         # for audio files, we need to know the duration the segment spans
         return time - (time % self.tdur), self.tdur
 
-    def _bus_message(self, bus, message):
-        if message.type == gst.MESSAGE_SEGMENT_DONE:
-            self._finishWaveform()
+    def _busMessageSegmentDoneCb(self, bus, message):
+        self.debug("segment done")
+        self._finishWaveform()
 
-        elif message.type == gst.MESSAGE_ERROR:
-            error, debug = message.parse_error()
-            # FIXME: do something intelligent here
-            print "Event bus error:", str(error), str(debug)
+    def _busMessageErrorCb(self, bus, message):
+        error, debug = message.parse_error()
+        print "Event bus error:", str(error), str(debug)
 
         return gst.BUS_PASS