This splits apart the actual signal handler from the work that needs to be done
to update the GUI in response to a tempo map change. This allows us to do the
visual update when we are manipulating the thread-local write copy of the map
during e.g. a drag operation.
This commit leaves two issues outstanding:
1. unclear/ugly semantics for drag operations that reset the GUI thread's tempo map to the writable copy
2. undo/redo for the tempo map
These will be addressed in future commits
Major changes: do not delete and recreate markers and curves for every tempo map
change, attach tempo curves directly to their (preceding) tempo marker, notable
cleanup of TempoCurve class to remove unnecessary members.
More tweaks expected since algorithm for matching markers and tempo map
points is not correct yet.
TempoMap::use() merely returns the current per-thread tempo map
pointer; if a change is signalled, we should force an update
of the per-thread ptr via TempoMap::fetch()
After beginning an edit operation with TempoMap::write_copy(), the tempoPoint and meterPoint objects
referenced by markers are incorrect, since they refer to the original map, not the copy we are working
on. Fix this with Editor::reassociate_metric_markers()
Some instances requiring this fix may still remain
Copyright-holder and year information is extracted from git log.
git history begins in 2005. So (C) from 1998..2005 is lost. Also some
(C) assignment of commits where the committer didn't use --author.
Separate Snap from Grid. Lots of naming changes.
Multiple simultaneous snap options allowed. Grid is one of the possible Snap options.
Grid uses the same data as the rulers. Replace complicated tempo_lines with simple grid_lines.
The Grid is zoom-scale-sensitive along with the rulers. If you are zoomed out, grid becomes coarser.
Generated by tools/f2s. Some hand-editing will be required in a few places to fix up comments related to timecode
and video in order to keep the legible
