... which is not yet used for anything.
It could be used to describe textual paths for attaching plug-in menu items.
Strings are only path local, not necessarily globally unique, and may be
left empty for separators and for groups that should be transparent to
path identification.
It may also be empty for certain sub-menus, such as those that group effects
according to the changeable criteria in Preferences.
... Except a few where project or plugin manager state or preferences are
needed to compute the items, so evaluation is delayed, often inside lambdas
Comment "Delayed evaluation" wherever there are exceptions
... There are now four immediate subclasses (SharedItem and Computed Item,
which are final, and SingleItem and GroupItem, which are abstract), which may
serve future purposes more general than menu items. There are further
subclasses specific to menu management.
The former concrete class GroupItem is renamed TransparentGroupItem.
Also allows direct construction of items in lists from shared pointers.
* Calculate loudness for short or silent selections as well.
In case of selections shorter than 400ms (one momentary loudness block),
take what we have got and divide only be the actual length.
Abort loudness normalization silently if the selected audio is all
silent.
* Fix loudness effect bug when selection includes a gap.
If the selected audio in a track contained a gap between two clips,
an incorrect amount of samples was processed.
... This caused visible anomalies, for instance when dragging the stereo track
separator between channels. Numbers from one channel used to be drawn over
the ruler of the opposite channel.
... which forces us to be more explicit about just what parts of the Ruler
state are used in it (when we construct it) and be sure they don't modify it
... on the way to making them not (direct) member functions of Ruler.
Hoist the choice of font and destination label array out of them, and
group other outputs into an argument.
... Move some fields used only during formatting into a temporary structure.
(And fixing a minor problem with uninitialized variables in case of logarithmic
scale, which made it unpredictable how Plot Spectrum with logarithmic
frequencely axis formatted numbers.)
... and also draw the zeroes if in range, taking precedence over the extreme
values (which might be positive dB values when zoomed out or scrolled).
See comments 10 and 11 in the bug report.
