Any chance of some sort of summary on what's done and what remains
to be done with the control rulers?  Or a discussion about it, if
the situation isn't clear.

As far as I can see at the moment, you can show a velocity ruler
and any number of controller rulers, but the controller rulers are
all the same and I don't see any way to determine which controller
they edit.  And there's this "Add Control Ruler..." that doesn't
seem to do anything.  What is the intended structure or workflow?

Some other points for discussion:

 -- We also need a tempo editor; how good are our chances of
    making a control ruler subclass work as a tempo editor in
    the main view?  Tempo is not an "events in a segment" affair,
    but there's a reasonably straightforward API in Composition
    for querying and setting it.

 -- The bar-chart thing is not always quite as satisfactory for
    controllers as for e.g. velocity.  Controllers are far more
    likely to have small values (and particularly zero) which
    I guess don't show up so well, and they may also be centred
    on 128 (like pan etc).  Any thoughts?  Are controllers with
    the value zero actually visible?

 -- How to deal with things like remembering which rulers are
    visible, in the (likely) case that the user wants the same
    set each time a particular editor is invoked?

 -- A big nice feature would be the ability to set a series of
    control values along drawn lines or curves.  In or out of
    scope for 1.0?


Chris



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