... for functions in final classes.
override is like const -- it's not necessary, but it helps the compiler to
catch mistakes.
There may be some overriding functions not explicitly declared virtual and I did
not identify such cases, in which I might also add override.
... Should have no effect on generated code, except perhaps some slight faster
virtual function calls. Mostly useful as documentation of design intent.
Tried to mark every one of our classes that inherits from another, or is a
base for others, or has abstract virtual functions, and a few others besides.
This fixes the problem on GTK where the text was unreadable when
using a "dark" theme.
And fixes the double display of the real tooltip and the tip panel
being displayed at the same time on GTK and OSX. It seems that
the "disabling/reenabling" of tooltips doesn't take affect right
away anymore...maybe it never did.
... SpectrogramSettings does that instead, and Preferences or View Settings
are the user interface for changing it.
Handle invalidation of spectrogram pixel cache for scale type changes,
just as for other changes of settings. No more
TrackArtist::InvalidateSpectrumCache().
View type of track now switches to Spectrum when applying or OKing the
View Settings... dialog and the Spectrogram page is open (and for now
it is still the only page)
Simplify the partial copying of wave and spectrum caches. Use memcpy for speed.
Don't memcpy out of the caches into temporary buffers for TrackArtist,
just pass
pointers.
More vectors in the cache classes, fewer deletes.
Pulled big loop, and its body, out of the spectrogram routine into functions.
Zooming-in of spectrograms (or other view changes that invalidate the
whole pixel cache of the WaveClip) used to do at least one opening and
closing of a block file for each column of pixels. With this change,
open each block file not more than once for each repopulation of the
cache.
Improved speed may be more noticeable on less powerful computers, or when
the audio file is in a slower storage device.
