This removes all of the OnDemand code embedded throughout
the main codebase. Individual files related specifically
to OD have been left in place, but removed from the build.
... TrackPanelAx now sends an event to the project when track focus changes,
and TrackPanel listens for it.
TrackPanel also initializes TrackPanelAx with a callback to do the details of
rectangle calculation.
... and updating of them is accomplished privately in implementation files,
reducing intrusions into TrackPanel and ProjectWindow
This removes #include-s from TrackInfo.cpp, leaving dependency cycles better
than previously
... As when recording starts or stops, or the Tools button has changed, or
scrolling has changed the results of hit-test.
This reduces TrackPanel's intrusions into other code, including ProjectHistory.
Also for AdornedRulerPanel, which shares the base class CellularPanel
... Just one low-level function for each that simply sets; just one high-level
function for each that also pushes notifications; and to make that work,
toolbars need some rewriting to avoid recursion when the notifications they
post come back to them.
... except Experimental.h, but see preceding commit.
This is especially important in the header files.
Be sure there are no quiet changes of meaning when a header file is included
in a different context, not having seen Audacity.h. Rather include Audacity.h
even if redundantly.
Also, in some header files, move more inside the include-guard #ifdef-#endif
pair.
... Reimplement the ESC key handling in TrackPanel and time ruler on all
operating systems so that it does not rely on the focused window, but instead
uses the application-wide event filter.
This includes reversion of 9491605cfc8a7d60117365884fd494996b5ebbaf
... except Audacity.h; and in no others.
Do so even if Experimental.h gets multiply included, as in both the .h and
.cpp files.
This makes it easier to do a text scan to be sure there are no unintended quiet
changes of meaning because of omission of Experimental.h when the flag is
an enabled one.
Also move inclusions of Experimental.h earlier.
Also don't require Experimental.h to be preceded by Audacity.h to define
EXPERIMENTAL_MIDI_OUT correctly.
... instead define new base classes in src/commands that those other
windows can inherit. The classes have nothing but a virtual destructor. This
lets CommandManager use dynamic_cast to detect the special windows.
See commits cbfde23 and 68e4bf6 which added the #include directives
