Re: [Protux-devel] Question about MustuxDrawable

[Luciano Giordana]

> MustuxDrawable is implemented as a QWidget, but shouldn't QCanvas be a
> better choice?

firt QT implementations was using Canvas. That fit a lot for mustache (score 
editing) but not for audio drawing,specially because of the zoom issues..
also, MustuxWidget has other purposes than simply drawing. It is a concept not 
a drawarea only. thats why we prefer qwidget as base class

anyway, save that for mustache. it will help a lot..

>
>  It has almost the same possibilities as QWidget but is better designed for
> drawing multiple items on it.
> Benefits are speed and memory usage as well as ohters. I coded allready
> some bits, but protux classes has to be updated a lot to make use of
> QCanvas, so I'd like to know first what you think about it.
> I made the Classes MustuxCanvasView and MustuxCanvas which is then a
> replacement for MustuxWidget and MustuxDrawableRegion in the classes which
> paint directly to the canvas (formerly widget) like Track, CursorManager,
> AudioClip, etc.
>
> Of course, an RFC for this ;-)
>
> Some notes for ALSA stuff, the docs are updated, so I found out for example
> that 2 streams can be easily synced with the "pcm_link(capture_handle,
> playback_handle) for example.
>
> Another note: It isn't clear how Track, TrackPanel interacts with
> eachother. This is especially true in regard to the update routines, which
> repaints the tracks, trackpanels, etc.
>
>
> Thanks, and waiting for your answer,
>
> Remon
>
>
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-- 
Best Regards
--
Luciano Giordana
Free Software Developer / Musician
Project Protux : Professional Audio Tools for GNU/Linux
http://www.nongnu.org/protux
Portalcon Software Livre - Americana - SP - http://www.portalcon.com.br