gcc can recognize various regexps in comments. Since C++17 provides
[[fallthrough]], using /* fallthrough */ consistently seems
appropriate until we switch to C++17.
see also https://gcc.gnu.org/onlinedocs/gcc/Warning-Options.html
The singleton ActionModel provides a Gtk::Treestore of all actions known to
ardour.
To be used for example by surface control editors to implement action bindings.
This is to be used sparingly because the pattern is dynamically
created every time. Mainly for the benefit of some Mixbus
widgets -- compared to ArdourButton::convex_pattern
Previously the action-manager only called ::abort() when
an action could no be found. This add a further restriction
that the expected class must match.
eg. LV2 externalUI windows are not managed by ardour; Ardour cannot
intercept mapped() or delete_event() signals and hence also not
create a visibility-tracker.
First call to WindowProxy::toggle() creates the window, and the 2nd call
crashed since 6ca8ec5141, due to missing vistracker.
e.g. externalUI plugin windows, the processor-box uses WindowProxy
for all plugin-UIs incl. externalUIs.
This fixes inconsistent WM::Proxy state when a window is destroyed
Specifically "session-options-editor" when the session is unloaded;
previously "toggle-session-options-editor" was never unset.
Without this, the visibility tracker will report that the window is not visible at startup, and
this overrides the XML _visible property which denotes that the window should be made visible
Changing a tooltip resets the timeout. In one particular case,
while rolling, AudioClock::set() is calling set_tooltip() at a rate
faster than the tooltip timeout and prevents tooltip from showing at all
(even if there is no actual change to the tooltip text).
Alas, there is no trivial fix for this UI side and there may be other
such cases. A central check is more than practical.
