Changes

  def choose(self, widget):

  def choose(self, widget):

    chooser = ObjectChooser(parent=self, what_filter=mime.GENERIC_TYPE_AUDIO)

    chooser = ObjectChooser(parent=self, what_filter=mime.GENERIC_TYPE_AUDIO)

    result = chooser.run()

    result = chooser.run()

    if result == gtk.RESPONSE_ACCEPT:

    if result == gtk.RESPONSE_ACCEPT:

      self.jobject = chooser.get_selected_object()

      self.jobject = chooser.get_selected_object()

      self.path = str(self.jobject.get_file_path())

      self.path = str(self.jobject.get_file_path())

    else:

    else:

      self.jobject = None

      self.jobject = None

      self.path1 = "0"

      self.path = "0"

=== Random observations: ===

=== Random observations: ===

# I exclude Sugar 0.82 for two reasons (which means, unfortunately, "no user soundfiles for 0.82"):

# I exclude Sugar 0.82 for two reasons (which means, unfortunately, "no user soundfiles for 0.82"):

#* its version of Object Chooser does not allow filtering for the audio mime type;

#* its version of Object Chooser does not allow filtering for the audio mime type;

#* Sugar 0.82's Csound (5.08) - or more specifically its version of libsndfile - does not handle ogg vorbis soundfiles, the type that the Record activity creates. Record is the most likely/accessible means that children would use to create their own soundfiles. (The whole idea behind using Object Chooser here is to select user files that have been placed in the Journal [as Record does by default] for performance in FileMix.)

#* Sugar 0.82's Csound (5.08) - or more specifically its version of libsndfile - does not handle ogg vorbis soundfiles, the type that the Record activity (later versions) creates. Record is the most likely/accessible means that children would use to create their own soundfiles. (The whole idea behind using Object Chooser here is to select user files that have been placed in the Journal [as Record does by default] for performance in FileMix.)

#* In addition, earlier versions of Record (<v64 or so) create ogg SPEEX soundfiles; even the recent versions of Csound (actually, libsndfile) do not handle this (lo-fi) format.

#* In addition, '''earlier''' versions of Record (<v76, except for v61-64) create ogg '''speex''' soundfiles; even the recent versions of Csound (actually, libsndfile) do not handle this (lo-fi) format. (Unfortunately, ''no'' versions of Record [as of 12/10] produce any audio, ''except'' ogg speex, in Sugar > 0.84.)

# self.path stores the soundfile name (complete path); self.jobject stores the object itself. This is key to being able (in Csound) to locate and load the selected soundfile. self.path is then a channel opened to send the named soundfile to Csound.

# self.path stores the soundfile name (complete path); self.jobject stores the object itself. This is key to being able (in Csound) to locate and load the selected soundfile. self.path is then a channel opened to send the named soundfile to Csound.

# If the user closes the Object Chooser box instead of clicking on a sound object, the result is not accepted, and self.path reverts to "0" - which is a flag (in Csound) to revert to the default soundfile included in FileMix.

# If the user closes the Object Chooser box instead of clicking on a sound object, the result is not accepted, and self.path reverts to "0" - which is a flag (in Csound) to revert to the default soundfile included in FileMix.

# The str() cast for self.path converts the filename to the usual path format readable by Csound (this too is required). It is dbus string object... maybe we need to this type cast in sugar-toolkit code (though in most cases this casting should happen implicitly).

# The str() cast for self.path converts the filename to the usual path format readable by Csound (this too is required). Otherwise, the file_path is a dbus string object; maybe we need to cast this type in sugar-toolkit code (though in most cases this casting should happen implicitly).

 

The above code is included in FileMix-4.xo, in filemix.py (where there are 4 Object Chooser methods triggered by 4 callback buttons). Source for this activity has been made visible online.

''Art Hunkins and Aleksey Lim''

''Art Hunkins and Aleksey Lim''