Erik Sandberg wrote:
Hi,
Here's my plan on how to front-port music streams to the 2.9 branch.
1. Implement classes Dispatcher, Stream_event, Listener (move modules from my
thesis fork)
2. Add dispatchers event_source_, and possibly events_below_, to Context
class.
3. Make Context::try_music send stream events to the event_source_.
4. Refactor certain iterators (apply-context, time-scaled-music), so that all
music events are sent to bottom contexts.
5. Refactor commands such as lyricsto, to eliminate busy-playing-event etc.
6. There should now be no dependency on the try_music return value, so it
should be safe to make Translator_group::try_music an event handler.
7. Add stream events for CreateContext, ChangeContext, Prepare, OneTimeStep,
SetProperty, etc. These are quite easy to implement.
8. Various cleanups; e.g., remove the unneeded Score_context class.
Comments?
I'd start with 4. because they're independent from the rest, and we can
readily test the rest of those.
--
Han-Wen Nienhuys - [EMAIL PROTECTED] - http://www.xs4all.nl/~hanwen
LilyPond Software Design
-- Code for Music Notation
http://www.lilypond-design.com
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